apparatus for burning fuel at high pressure and high temperature

专利摘要:
APPLIANCE FOR COMBUSTING A HIGH PRESSURE AND HIGH TEMPERATURE FUEL AND ASSOCIATED SYSTEM. It is a combustion apparatus (220) comprising a mixing arrangement (250) for mixing a carbonaceous fuel with enriched oxygen and a working fluid to form a fuel mixture (250A). A combustion chamber (222) is at least partially defined by the porous perimeter sweating member, at least partially surrounded by a pressure containment member. The combustion chamber (222) has longitudinally spaced inlet and outlet portions. The fuel mixture is received by the inlet portion (222A) for combustion inside the combustion chamber at a combustion temperature to form a combustion product. The combustion chamber (222) additionally directs the combustion product longitudinally towards the outlet portion (222B). The porous transpiration member (230) is configured to direct a transpiration substance substantially uniformly around it, around the perimeter of it that defines the combustion chamber (222) and longitudinally between the inlet portions (222A) and outlet (222B), towards the combustion chamber (222) to buffer the interaction between the combustion product and the porous transpiration member (230). The systems (...).
公开号:BR112013004960B1
申请号:R112013004960-0
申请日:2011-08-30
公开日:2020-12-01
发明作者:Miles R. Palmer；Rodney John Allam；Glenn William Brown Jr.；Jeremy Eron Fetvedt
申请人:Palmer Labs, Llc；8 Rivers Capital, Llc；
IPC主号:

专利说明:

BACKGROUND OF THE REVELATION REVELATION FIELD
[0001] The present disclosure relates to devices and systems for the combustion of a carbonaceous fuel with oxygen at high pressure and high temperature to produce combustion products that are oxidized with an excess of oxygen or that contain reducing components and have zero content of oxygen. One application in particular would be for the generation of energy, such as electricity, through the use of a working fluid to transfer the energy generated through the high efficiency combustion of a fuel. In particular, such devices and systems may use carbon dioxide or steam as the working fluid. In another aspect, the devices and systems can be used to generate a gas that contains hydrogen and / or carbon monoxide. DESCRIPTION OF RELATED TECHNIQUE
[0002] It is estimated that fossil fuels will continue to supply the largest volume of the world's electrical power needs for the next 100 years as sources of non-carbon power are developed and employed. Known methods of power generation through combustion of fossil fuels and / or adequate biomass, however, are plagued by rising energy costs and increased production of carbon dioxide (CO2) and other emissions. Global warming is increasingly seen as a potentially catastrophic consequence of increased carbon emissions by developed and developing nations. The solar and wind forces do not seem to be able to replace fossil fuel combustion in the short term and the nuclear force has dangers associated with both the proliferation and the elimination of nuclear debris.
[0003] Conventional provisions for power production from fossil fuels or suitable biomass are now increasingly burdened with a need for high pressure CO2 capture for delivery to sequestration sites. This need has proved difficult to satisfy, however, since the present technology provides only very low thermal efficiencies for even the best CO2 capture projects. In addition, the capital costs of obtaining CO2 capture are high and can therefore result in significantly higher electricity costs compared to systems that emit CO2 into the atmosphere. Consequently, there is an ever greater need in the art for devices and methods for high-efficiency power generation with a reduction in CO2 emissions and / or improved ease in capturing and sequestering produced CO2.
[0004] Oxy-fuel combustion of carbonaceous fuels involves the separation of substantially pure oxygen from the air (or otherwise provides such substantially pure oxygen for use in the combustion process) and uses oxygen as a combustion medium to produce products combustion systems that are substantially nitrogen-free and comprise carbon dioxide and water vapor. Today's air and oxy-fuel combustion engines operate at limited temperatures and pressures to prevent damage from over-temperature to the combustion walls and / or other system components, such as turbine blades. Limiting the operating temperature and / or pressure can, in some cases, undesirably prolong the combustion process and / or require a relatively high combustion volume. Other than that, the combustion process, combustion design and / or downstream exhaust gas processing provisions may also be undesirably dependent on the type of fuel used for the process. Additionally, due to the large volumes of flue gases applied to conventional boiler systems in the current technique and the escape of these gases into the atmosphere, the current methods of removing pollutants from exhaust chimney gases and proposed oxy-fuel combustion systems are highly dependent on the detailed design of the plant and the exact type of fuel burned at the plant. Each type of fuel has a contrasting chemical composition and quantity of pollutants. Therefore, the current technique undesirably requires that the exhaust gas purifying systems or oxy-fuel combustion modifications for each plant are custom designed specifically to accommodate a particular type of fuel with a particular chemical composition.
[0005] The current coal technique, as an example, generally uses a single very large combustor equipped with vertical tubular walls or helically configured tubular walls in which steam at high pressure is generated and superheated in a separate superheater section. The oversize combustion can experience significant heat loss and, in general, is subject to damage, as well as scaling of the burners, radiating and convective heat transfer surfaces and other components among coal ash, slag and corrosive components such as SOX , HCl, NOX, etc. in flue gases depending on the particular coal used. Such exemplary disadvantages may require the entire plant to be closed for repair or replacement of corroded or damaged parts and / or other components at periodic intervals and may therefore result in less plant availability and undesirable difficulties in compensating for lost plant emissions during idle times. SUMMARY OF THE REVELATION
[0006] The above needs and other needs are addressed by aspects of the present disclosure which, according to a particular aspect, provide an apparatus, such as a combustion apparatus that includes a mixing arrangement configured to mix a carbonaceous fuel with enriched oxygen and a working fluid to form a fuel mixture. A combustion arrangement defines a combustion chamber that has an inlet portion separated longitudinally from an opposite outlet portion, wherein the inlet portion is configured to receive the fuel mixture for combustion within the combustion chamber at a combustion temperature to form a combustion product. The combustion chamber is further configured to direct the combustion product longitudinally towards the outlet portion. The combustion arrangement comprises a pressure containment member and a porous perimetric transpiration member which at least partially defines the combustion chamber and which is at least partially surrounded by the pressure containment member. The porous sweat member is configured to substantially uniformly direct a sweating substance through it towards the combustion chamber in such a way that the sweating substance is directed to flow helically around its perimeter and longitudinally between the portion inlet and outlet portion to buffer the interaction between the combustion product and the porous sweat member. In some cases, the flow of the transpiration substance can be directed into the combustion chamber by the porous transpiration member in a substantially uniform manner around its perimeter and longitudinally between the inlet and the outlet portion in such a way that the perspiration substance is directed to flow substantially tangentially to the perimeter of the porous transpiration member and helically around it. Otherwise, the transpiration substance can be introduced into the combustion chamber to obtain a desired outlet temperature of the combustion product. A transformation apparatus can be configured to receive the combustion product in which the transformation apparatus is responsive to the combustion product to transform thermal energy associated with it into kinetic energy.
[0007] In another respect, the combustion of oxy-fuel from carbonaceous fuels (and / or hydrocarbonaceous fuels) may also involve the separation of substantially pure oxygen from the air (or otherwise supply such substantially pure oxygen) and its use in accordance with combustion process to produce combustion products that are substantially nitrogen-free and that comprise carbon dioxide and water vapor. The carbon dioxide-rich combustion product (after cooling and water condensation) can then be made available for subsequent commercial use such as for improved oil recovery or improved natural gas production or disposal at a geologically suitable sequestration site ( after compression and purification). The operation of a high pressure oxy-fuel power production system can also allow the carbon dioxide derived from the fuel to be produced at a high pressure, which results in power savings by reducing or eliminating the need to pressurize the dioxide of carbon. In addition, the high pressure operation can allow the purified products of combustion to be used directly in a force cycle, when mixed with a suitably heated working fluid such as CO2 or steam. The operation of the high pressure power system can also lead to reduced volumetric fluid flow rates in the power cycle, which results in smaller equipment and lower capital costs. The high-pressure oxy-fuel combustion with temperature control supply is another important aspect. The regulation of a suitable fluid such as a product of combustion of gas or carbon dioxide or liquid water or steam (such as from a recycling stream) through a wall / space of the combustion chamber cooled by transpiration and also protected can serve to control the combustion temperature. The flow of the sweating substance through the combustion chamber walls can also serve to eliminate damage to and / or accumulate in the chamber walls due to heating or ash or shock effects from liquid slag. Therefore, an efficient high temperature and high pressure combustor is provided that can be adapted to burn a variety of gaseous, liquid or solid fuels or a mixture of fuels to suit various needs as part of a power system that can operate at a significantly higher efficiency and lower capital costs than the present technology. In some cases, the combustion can be operated to produce a combustion product that comprises hydrogen and carbon monoxide to be made available for later needs other than power production.
[0008] In a still further aspect, the present disclosure generally provides methods and devices associated with a high-temperature, high-efficiency oxy-fuel combustor protected from breathable fluids for use, for example, in power generation, as as in combination with a force cycle by use or CO2 and / or H2O as a working fluid. In such an application, the combustion can be operated in an oxidation mode whereby the combustion products produced with it contain an oxygen concentration in the range between about 500 ppm and about 3 molar% and a concentration of carbon monoxide below about 50 ppm, preferably below about 10 molar ppm. In another aspect, the combustion can be operated in a reduction mode whereby the combustion products produced thereby have an almost zero oxygen concentration and the combustion products contain a concentration of CO and H2. The reduction mode operation can be configured to maximize the production of H2 and CO and to minimize the consumption of O2. The operation reduction mode can be beneficial not only for power production, but also for the production of H2 or H2 + CO synthesis gas. In particular aspects, the operating pressure can be in the range between about 4 MPa (40 bar) and about 50 MPa (500 bar) and, preferably, at least 80 MPa (80 bar) and the temperature of the combustion product it can generally be in the range between about 400 ° C and about 3,500 ° C.
[0009] In aspects involving the production of force, the portion of a working fluid is introduced into the combustor together with a fuel and an oxidizer (ie enriched oxygen) for combustion in such a way that the high pressure fluid stream and high temperature (combustion product) is produced which comprises the working fluid and combustion products. The working fluid can be introduced through the perspiration protected walls of the combustion chamber and / or through additional injection points around the combustion chamber. The working fluid, after the combustion process and mixing with the combustion products through perspiration, can have a temperature in a suitable range (ie, low enough) for direct introduction into a power generation device such as a turbine. In such circumstances, the total amount of working fluid introduced into the combustor as a diluent for combustion products, can be adjusted to provide an outlet temperature for the total working fluid stream that leaves the combustion having the temperature and temperature. adequate pressure for the start of operation of the power turbine. Advantageously, the fluid stream can be maintained at a relatively high pressure during expansion in the turbine in such a way that the pressure ratio for the turbine (i.e., the pressure ratio at the input to the pressure at the turbine outlet) is less than about 12. The fluid stream can also be further processed to separate the components from the fluid stream where such processing may include passing the fluid stream through a heat exchanger. In particular, the expanded working fluid (at least a portion of which can be recycled from the fluid stream) can be passed through the same heat exchanger to heat the working fluid to high pressure prior to its introduction into the combustor . In certain aspects, the disclosure provides a high-pressure oxy-fuel combustor for power production systems that can produce power at high efficiency at a low capital cost and can also produce substantially pure CO2 at a pipeline pressure for commercial use or kidnapping. CO2 can also be recycled in the power generation system.
[00010] In other respects, the revealed combustion systems and methods can be configured to use a wide variety of fuel sources. For example, the high-efficiency combustor according to the disclosure can use gaseous fuels (for example, natural gas or gases derived from coal), liquids (for example, hydrocarbons, bitumen) and / or solids (for example, coal, lignite , petroleum coke). Even other fuels, as described elsewhere in this document, can be used such as algae, biomass, or any other suitable organic combustible materials.
[00011] In other respects, the methods and systems of the present disclosure, when combined with force systems with CO2 capture at a pipeline pressure, may be useful in that the combined system can exceed the best efficiency of power stations current carbon-powered steam cycle systems that do not provide CO2 capture. Such current power stations can provide, at most, for example, about 45% efficiency (L.H.V.) with 4.3 centimeters of mercury condenser pressure through the use of bituminous coal. Aspects of the present system can exceed this efficiency, for example, while delivering CO2 at a pressure of 20,000 Kpa (200 bar).
[00012] In yet another aspect, the present disclosure may provide the ability to reduce the physical size and capital cost of a power generation system compared to technologies that use a similar fuel. Therefore, the methods and systems of the present disclosure can contribute to or significantly facilitate otherwise reduced construction costs associated with power generation systems and the relatively high efficiency of certain system combinations can lead to reduced electricity production costs or energy as well as reduced use of fossil fuels.
[00013] In one aspect in particular, the present disclosure is directed to a method of generating force that incorporates the use of a working fluid such as CO2 and / or H2O. In some ways, the method may comprise introducing compressed and heated CO2 and / or superheated steam into a fuel combustion. Preferably, CO2 and / or steam can be introduced into a combustor that operates at a pressure of at least about 8,000 Kpa (80 bar). CO2 and / or H2O can be introduced into the combustor in two or more separate locations. Part of the CO2 and / or H2O can be mixed with O2 and solid, liquid, gaseous or supercritical fuel so that the combustion temperature inside the combustion chamber can be determined based on the desired design value for the combustion. The rest of the heated CO2 and / or superheated steam is then introduced into the combustion chamber to cool the combustion products by directly mixing it to obtain a desired total output fluid temperature between about 400 ° C and about 3,500 ° C, which may be required by the power production system. Under such conditions, CO2 and / or H2O may mix with combustion gases that result from combustion of the fuel with an oxidizer such as oxygen to a purity greater than 85 mol%, to produce a fluid stream comprising CO2 and / or H2O at the desired temperature. In particular aspects, the outlet fluid current temperature can be in the range of between about 400 ° C and about 3,500 ° C. In other respects, the output fluid stream can be expanded by the turbine to generate power (that is, to generate electricity through the energy transmitted to the turbine).
[00014] In certain aspects, it may be useful to heat the working fluid to an even higher temperature before being introduced into the combustion. For example, CO2 and / or H2O can be heated to a temperature of at least about 200 ° C to about 700 ° C prior to introduction into the combustor. In other respects, CO2 and / or H2O can be heated to a temperature between about 700 ° C and about 1,000 ° C prior to introduction into the combustion. In some respects, such heating can be done by using a heat exchanger arrangement. As further disclosed in this document, the same heat exchanger can be used to cool the fluid stream that leaves the power generation turbine.
[00015] Similarly, the combustion can be usefully operated at a higher pressure to produce a working fluid capable of obtaining very high efficiency in a production of a force cycle. For example, the combustor and the introduced portion of the CO2 and / or H2O working fluid can be pressurized to at least about 20,000 Kpa (200 bar). In other respects, the pressure can be between about 20,000 Kpa (200 bar) and about 50,000 Kpa (500 bar).
[00016] In certain respects, the portion of the working fluid introduced into the combustor can be a recycled stream of substantially pure CO2 so that any water content in the working fluid originates from the fuel. It is obvious that CO2 from an external source can be used as a working fluid.
[00017] The stream of fluid leaving the combustor can comprise the working fluid CO2 and / or H2O as well as one or more other components such as combustion products derived from the fuel or the combustion process. The outgoing fluid stream can contain components such as H2O, SO2, SO3, NO, NO2, Hg, HCl plus excess oxygen in the range between about 300 ppm and about 3 mol%. In other respects, the outgoing fluid stream can contain at least varying fractions of H2 and CO and have substantially zero O2 content.
[00018] The combustion may comprise an inlet nozzle arrangement through which the fuel plus oxygen plus a portion of the working fluid is introduced into the combustion and where combustion is initiated and happens in a stable manner, in either an oxidation or a reduction mode, over a desired fuel flow range that is normally between about 50% and about 100% of the project's capacity. In certain aspects, the operating pressure can be above about 15,000 Kpa (150 bar) and, at this pressure, oxygen can be introduced as a mixture of a single phase with CO2 and a fuel such as natural gas or a liquid such as a hydrocarbon distillate to obtain the required adiabatic flame temperature. If the CO2 at this high pressure is at a temperature below about 100 ° C, the density of the CO2 is high enough to be used to support a significant fraction of pulverized coal to form a slurry, where the slurry can, then, be pumped by a high pressure pump to a required pressure and combustion flow in a pipe and to a mixing point where the supercritical mixture of CO2 and oxygen is added to obtain a necessary adiabatic flame temperature in the combustion. Pre-mixed fuel, CO2 and diluting oxygen should, desirably, be at a combined temperature that is below the system's auto-ignition temperature. The temperature of the CO2 stream can be adjusted to meet this criterion. The inlet nozzle may comprise an arrangement of holes in an injection plate, each of which will produce a fine stream of fluid that results in rapid heat and combustion transfer, thereby producing a stable combustion zone. The orifice sizes can range from about 0.5 mm to about 3 mm in diameter.
[00019] The walls of the combustion chamber can be aligned with a layer of porous material through which a second part of the diluent stream CO2 and / or H2O flows and flows. The fluid flow through this porous transpiration layer and, optionally, through additional provisions, is configured to obtain the required total outlet temperature of the outlet fluid stream between about 400 ° C and about 3,500 ° C. This flow can also serve to cool the transpiration member to a temperature below the maximum permitted operating temperature of the material that forms the transpiration member. The perspiration substance, such as the CO2 and / or H2O diluent stream, can also serve to prevent shock from any liquid or solid ash materials or other contaminants in the fuel that can corrode, clog or otherwise damage the walls. In such circumstances, it may be desirable to use a material for the sweat member with reasonable (low) thermal conductivity so that the incident radiated heat can be conducted radially out through the porous sweat member and then be intercepted by the transfer of convective heat from the surfaces of the porous layer structure to the fluid that passes radially through the transpiration layer. Such a configuration may allow the subsequent part of the diluent stream directed through the sweat member to be heated to a temperature in the range of between about 500 ° C and about 1,000 ° C while simultaneously maintaining the temperature of the porous sweat member within the range design of the material used for it. Suitable materials for the porous transpiration member may include, for example, porous ceramic, refractory metal fiber materials, cylindrical sections with a drilled hole and / or layers of sintered metal or sintered metal powders. A second function of the sweat member may be to ensure a substantially balanced radially inward flow of sweating diluent substances, as well as longitudinally along the combustion to obtain a good mixture between the secondary part of the diluent stream and the combustion product while promoting balanced axial flow along the length of the combustion chamber. A third function of the sweat member is to obtain a diluent fluid velocity radially inward to provide a buffer for or otherwise trap solid particles and / or liquid ash or other contaminants within the combustion products from the impact with the surface of the perspiration layer and causing blockage or other damage. Such a factor can only be of importance, for example, when combustion of a fuel such as coal that has a residual inert non-combustible residue. The internal wall of the combustion pressure vessel surrounding the transpiration member can also be isolated to isolate the second high temperature diluent stream within the combustion.
[00020] Coal or other fuels with a non-combustible residue can be introduced into the combustor as a slurry in water or, preferably, the slurry in liquid CO2. The liquid portion of the slurry leaves the force system at a temperature close to room and at the lowest pressure in the force cycle. The difference in enthalpy per mole between the slurry inlet condition and the gas outlet condition, in such circumstances, can be about 10 kcal / gm-mol for H2O and about 2.78 kcal / gm-mol for CO2, which gives a significantly high efficiency for a CO2 slurry fluid. Little additional energy is required in a high pressure CO2 force cycle as the working fluid to produce CO2 liquid at temperatures in the range of about -30 ° C to about 10 ° C.
[00021] The combustion temperature of fuels, generally solids such as coal, which produces non-combustible waste, is preferably in the range of about 1,800 ° C to about 3,000 ° C. Under such conditions, the ashes or other contaminants will be in the form of droplets of liquid slag that originate from the fuel particles in the fuel slurry feed. These liquid slag droplets must be collected efficiently to avoid contamination of the power turbine or other downstream processes. Removal can be achieved, for example, by using cyclonic separators, shock separators or tinted refabricated granular filter bases arranged in an annular configuration or combinations thereof. In particular aspects, the droplets can be removed from the high temperature working fluid stream by a series of cyclonic separators. To obtain efficient removal, there are preferably at least 2 and preferably 3 cyclonic separators in series. Removal efficiency can be improved by a number of factors. For example, the removal temperature can be adjusted to ensure that the slag viscosity is low enough to remove a free draining liquid slag from the separators. It may sometimes be necessary to perform slag removal at an intermediate temperature between the combustion temperature and the final temperature of the outlet fluid stream. In such cases, the final outlet temperature of the outlet fluid stream can be obtained by mixing a portion of the recycled working fluid (the transpiration substance) directly with the fluid stream exiting the slag removal system. The diameter of cyclonic separators should desirably be relatively small (that is, in the range of between about 20 cm and about 50 cm in diameter), while the diameter of the droplet droplets should be large enough to provide good separation efficiency. . Such conditions can be achieved, for example, by grinding the fuel coal to obtain a high fraction of> 50 microns in particle diameter. The coal is preferably particulate between about 50 microns and about 100 microns in average particle diameter, which can result in a minimum fraction of slag particles below a diameter of 10 microns being present in the fluid flow of exit job. In some cases, cyclonic separators can be followed by an annular filter placed immediately upstream of the turbine.
[00022] In particular aspects, a residence time for combustion products in the system can be in the range of 0.2 seconds to 2 seconds for natural gas and 0.4 seconds to 4 seconds for bituminous coal.
[00023] The stream of fluid leaving the combustor can exhibit a variety of different characteristics. For example, the fluid stream may comprise an oxidizing fluid. In this way, the fluid stream can comprise one or more components that can be quickly oxidized (for example, combusted) by the addition of an oxidizer (for example, O2). In some respects, the fluid stream may be a reducing fluid which comprises comprising one or more components selected from the group consisting of H2, CO, CH4, H2S and combinations thereof. The operation of the system in the reduction mode will generally be similar to the oxidation mode except that the proportion of the secondary diluent will be progressively reduced as a fraction of fuel converted to H2 + CO increases. It may also be necessary to increase the average residence time for combustion products progressively to a range between about 2.5 seconds and about 4.5 seconds for combustible natural gas as the conversion to H2 + CO increases to the maximum and between about 6 seconds and about 10 seconds for a bituminous coal.
[00024] The above and other aspects, therefore, solve the identified needs and provide advantages as detailed otherwise in this document. BRIEF DESCRIPTION OF THE DRAWINGS
[00025] Having therefore described the disclosure in general terms, reference will be made to the accompanying drawings, which are not necessarily drawn to scale and in which: Figure 1 is a schematic illustration of a combustion device cooled by transpiration according to with certain aspects of the present revelation; Figure 1A is a schematic illustration of a combustion temperature profile along the length of the combustion chamber in accordance with certain aspects of the present disclosure; Figure 2 is a schematic illustration of an exemplary cross section of a sweat member wall in a combustion apparatus in accordance with certain aspects of the present disclosure; Figure 2A is a schematic illustration of an exemplary cross section of a sweat limb wall in a combustion device, according to certain aspects of the present disclosure, made perpendicular to the longitudinal geometric axis of the same and illustrating a pore / perforation to provide a helical flow of a transpiration fluid; Figure 2B is a schematic illustration of an exemplary cross section of a sweat member wall in a combustion apparatus in accordance with certain aspects of the present disclosure that illustrates an angular pore / perforation configuration to facilitate a helical flow of a fluid from perspiration; Figure 2C is a schematic illustration of an exemplary cross section of a sweat member wall in a combustion apparatus in accordance with certain aspects of the present disclosure that illustrates fused longitudinal strips of the sweat member to facilitate a helical flow of a fluid from perspiration; Figure 2D is a schematic illustration of a shield structure configured to be arranged / inserted in relation to the transpiration member shown in Figure 2C in accordance with certain aspects of the present disclosure to facilitate a helical flow of a transpiration fluid; Figure 2E is a schematic illustration of a helical flow of a transpiration fluid within a combustion chamber of a combustion apparatus in accordance with certain aspects of the present disclosure; Figure 2F is a schematic illustration of a Coanda effect that can be implanted to facilitate a helical flow of a transpiration fluid within a combustion chamber of a combustion apparatus in accordance with certain aspects of the present disclosure; Figure 2G is a schematic illustration of opposite helical flows arranged in series of a transpiration fluid within a combustion chamber of a combustion apparatus in accordance with certain aspects of the present disclosure; Figures 3A and 3B schematically illustrate a heat assembly process for a transpiration member assembly of a combustion apparatus in accordance with certain aspects of the present disclosure; Figure 4 schematically illustrates a combustion product contaminant removal apparatus in accordance with certain aspects of the present disclosure; Figure 5 is a schematic plot showing ash particle trajectories as a function of average particle size and sweat flow rates in accordance with certain aspects of the present disclosure; and Figure 6 is a schematic of an adaptive power generation system in accordance with certain aspects of the present disclosure. DETAILED DESCRIPTION OF THE REVELATION
[00026] The present disclosure will now be more fully described hereinafter with reference to the accompanying drawings in which some, but not all aspects of the disclosure are shown. In fact, this disclosure can be incorporated in many different ways and should not be construed as limited to the aspects presented in this document; instead, these aspects are provided in such a way that this disclosure will satisfy applicable legal needs. Similar numbers refer to similar elements throughout the invention.
[00027] An aspect of a combustion apparatus capable of operating with a solid fuel according to the present disclosure is illustrated schematically in Figure 1, the combustion apparatus being, in general, indicated by the number 220. In this example, the combustion apparatus 220 it can be configured to combust a particulate solid such as coal to form a combustion product although any other suitable combustible organic material as disclosed herein can also be used as a fuel. The combustion chamber 222 can be defined by a transpiration member 230 which is configured to direct the transpiration substance such as a transpiration fluid through it in the combustion chamber 222 (i.e., to facilitate transpiration cooling and / or to buffer the interaction between the combustion product and the sweating member 230). One skilled in the art will appreciate that the sweat member 230 can be substantially cylindrical in order to define a substantially cylindrical combustion chamber 222 that has an inlet portion 222A and an opposite outlet portion 222B. Sweat member 230 can be at least partially surrounded by a pressure containment member 338. Inlet portion 222A of combustion chamber 222 can be configured to receive the fuel mixture from a generally indicated mixing arrangement number 250. According to particular aspects, the fuel mixture is combusted inside the combustion chamber 222 at a particular combustion temperature to form a combustion product in which the combustion chamber 222 is further configured to direct the product combustion towards outlet portion 222B. A heat removal device 350 (see, for example, Figure 2) can be associated with the pressure containment member 338 and configured to control its temperature. In particular situations, the heat removal device 350 may comprise a heat transfer jacket at least partially defined by a wall 336 opposite the pressure retaining member 338 in which a liquid can be circulated in the water circulation liners 337 defined between both. In one aspect, the circulating liquid can be water.
[00028] The mixing arrangement 250 is configured to mix a carbonaceous fuel 254 with enriched oxygen 242 and a working fluid 236 to form a fuel mixture 200. Carbonaceous fuel 254 can be supplied in the form of a solid carbonaceous fuel, a carbonaceous liquid fuel and / or carbonaceous gaseous fuel. The enriched oxygen 242 may be oxygen that has a molar purity greater than about 85%. The enriched oxygen 242 can be fed, for example, by any air separation system / technique known in the art such as, for example, a cryogenic air separation process or an oxygen separation membrane oxygen separation process high temperature (from the air) can be implanted. The working fluid 236 can be carbon dioxide and / or water. In cases where the carbonaceous fuel 254 is a particulate solid, such as pulverized coal 254A, the mixing arrangement 250 can be further configured to mix the particulate carbonaceous solid fuel 254A with a fluidizing substance 255. According to one aspect, the solid fuel particulate carbonaceous 254A can have an average particle size of between about 50 microns and about 200 microns. According to yet another aspect, the fluidizing substance 255 can comprise water and / or liquid CO2 which has a density between about 450 kg / m3 and about 1,100 kg / m3. More particularly, the fluidizing substance 255 can cooperate with the particulate carbonaceous solid fuel 254A to form a slurry 250A which has, for example, between about 25% by weight and about 95% by weight of the particulate solid carbonaceous fuel 254A or, in other cases, between about 25% by weight and about 60% by weight of particulate carbonaceous solid fuel 254A. Although oxygen 242 is shown in Figure 2 as being mixed with fuel 254 and working fluid 236 prior to introduction into combustion chamber 222, one skilled in the art will appreciate that, in some cases, oxygen 242 can be introduced separately into the combustion chamber 222, as needed or desired.
[00029] The mixing arrangement 250, in some respects, may comprise, for example, an arrangement of separate injection nozzles (not shown) arranged around an end wall 223 of the sweat member 230 associated with the inlet portion 222A of the cylindrical combustion chamber 222. Injection of the fuel / fuel mixture into the combustion chamber 222 in this way can provide, for example, a large surface area of the injected fuel mixture inlet stream which can, in turn, facilitate rapid heat transfer to the inlet stream of injected fuel mixture by irradiation. The temperature of the injected fuel mixture can therefore be increased rapidly to the ignition temperature of the fuel (ie, of the carbon particles) and can therefore result in compact combustion. The injection speed of the fuel mixture can be in the range, for example, from about 10 m / sec to about 40 m / sec, although these values depend on many factors such as the configuration of the injection nozzles in particular. Such an injection arrangement can take many different forms. For example, the injection arrangement may comprise an arrangement of orifices, for example, in the range of about 0.5 mm to about 3 mm in diameter, in which the injected fuel would be injected through it at a speed of about 10 m / s and about 40 m / s.
[00030] Such "direct injection" of the fuel / fuel mixture through generally straight, linear and / or unobstructed passages directly into the combustion chamber 222 can, for example, reduce wear, corrosion and / or particulate accumulation, particularly in cases where the fuel includes solid components (ie, a slurry of coal in a partial oxidation combustor (POX)). In some cases, however, it may be advantageous for the fuel / fuel mixture to deviate from the straight uniform flow once inside the combustion chamber 222. For example, it may be advantageous in some ways to make the fuel / fuel mixture be rotated or otherwise disturbed from the uniform straight flow in order, for example, to promote fuel / fuel mixture which therefore results in a more efficient combustion process.
[00031] In other respects, the mixing arrangement 250 may be remote from or otherwise separated from the combustion chamber 222. For example, in some respects, the mixing arrangement 250 may be configured to direct the fuel mixture 200 for a burner device 300 which extends in the combustion chamber 222 through the pressure containment member 338 and the transpiration member 230. The burner device 300 can be configured to introduce the fuel / fuel mixture into the combustion chamber 222 in a substantially uniform straight flow similar to the "direct injection" arrangement. That is, the burner device 300 can be configured to receive the fuel / fuel mixture from the mixing arrangement 250 and to direct a substantially uniform linear flow of the fuel / fuel mixture into the inlet portion 222A of the combustion chamber 222 However, in some cases (that is, the use of a fuel that does not include solid particulates), the burner device 300 may include appropriate provisions to cause or otherwise induce the fuel / fuel mixture to be spun or be rotated when directed in the combustion chamber 222 as will be appreciated by one skilled in the art. That is, the burner device 300 can be configured to be rotated or otherwise disturbed from the uniform straight flow of the fuel / fuel mixture after it is introduced into the combustion chamber 222. In some respects, the burner device 300 can be configured to receive the fuel / fuel mixture from the mixing arrangement 250 and to direct the fuel / fuel mixture in the inlet portion 222A of the combustion chamber 222 while inducing a swirl of the fuel / fuel mixture directed into the chamber combustion device 222. More particularly, the burner device 300 can be configured to induce eddy of the fuel / fuel mixture after the fuel / fuel mixture leaves the combustion chamber 222.
[00032] As shown more particularly shown in Figure 2, the combustion chamber 222 is defined by the transpiration member 230 which can be at least partially surrounded by a pressure containment member 338. In some cases, the pressure containment member 338 can be additionally at least partially surrounded by a heat transfer jacket 336 in which the heat transfer jacket 336 cooperates with the pressure containment member 338 to define one or more channels 337 between them through which a flow of low pressure water can be circulated. Through an evaporation mechanism, the circulated water can therefore be used to control and / or maintain a selected temperature of the pressure containment member 338, for example, in a range between about 100 ° C and about 250 ° Ç. In some aspects, an insulating layer 339 can be arranged between the sweat member 230 and the pressure containment member 338.
[00033] In some cases, sweat member 230 may comprise, for example, an external sweat member 331 and an internal sweat member 332, internal sweat member 332 being disposed opposite the outer sweat member 331 of the pressure containment 338 and defining the combustion chamber 222. The external sweat member 331 can be comprised of any suitable high temperature resistant material such as, for example, steel and steel alloys including stainless steel and nickel alloys. In some cases, the external transpiration member 331 can be configured to define first transpiration fluid supply passages 333A that extend through it from the surface of the same adjacent the insulation layer 339 to the surface of the same adjacent to the limb of internal sweating 332. The first sweating fluid supply passages 333A may, in some cases, correspond to second sweating fluid supply passages 333B defined by the pressure containment member 338, the heat transfer jacket 336 and / or through insulation layer 339. The first and second transpiration fluid supply passages 333A, 333B can therefore be configured to cooperate to direct a transpiration substance such as a transpiration fluid 210 through it to the internal transpiration member 332. In some cases as shown, for example, in Figure 1, sweating fluid 210 can comprise the working fluid 236 and can be obtained from the same source associated with it. The first and second transpiration fluid supply passages 333A, 333B can be isolated, as needed, to deliver transpiration fluid 210 (i.e., CO2) in sufficient supply and at a sufficient pressure such that the sweat 210 is directed through the internal sweat member 332 and into the combustion chamber 222. Such measurements involving sweat member 230 and associated sweat fluid 210 as disclosed herein may allow the combustion device 220 to operate at relatively high pressure and relatively high temperatures disclosed otherwise in this document.
[00034] In this respect, the internal perspiration member 332 can be comprised of, for example, a porous ceramic material, a perforated material, a laminated material, a porous material comprised of fibers randomly oriented in two dimensions and ordered in the third dimension or any other suitable material or combinations thereof which exhibits the necessary characteristics thereof as disclosed herein, namely multiple flow passages or pores or other suitable openings 335 for receiving and directing the transpiration fluid through the internal transpiration member 332. Examples non-limiting porous ceramics and other materials suitable for such perspiration cooling systems include aluminum oxide, zirconium oxide, transformation-strengthened zirconium, copper, molybdenum, tungsten, copper-infiltrated tungsten, tungsten-coated molybdenum, tungsten-coated copper , several high-t nickel alloys temperature, and materials coated with or covered with rhenium. Suitable material sources include, for example, CoorsTek, Inc., (Golden, CO) (zirconium); UltraMet Advanced Materials Solutions (Pacoima, CA) (refractory metal coatings); Osram Sylvania (Danvers, MA) (tungsten / copper); and MarkeTech International, Inc. (Port Townsend, WA) (tungsten). Examples of perforated materials suitable for such transpiration cooling systems include all of the above materials and suppliers (where perforated termination structures can be obtained, for example, by perforating an initially non-porous structure using methods known in the manufacturing technique ). Examples of suitable laminated materials include all of the above materials and suppliers (where laminated termination structures can be obtained, for example, by laminating non-porous or partially porous structures in such a way as to obtain the desired final porosity using known methods manufacturing technique).
[00035] In still further aspects, the internal perspiration member 332 can extend from the inlet portion 222A to the exit portion 222B of the perspiration member 230. In some cases, the perforated / porous structure of the internal perspiration member 332 may extend substantially completely (axially) from the inlet portion 222A to the outlet portion 222B such that the transpiration fluid 210 is directed, substantially, the entire length of the combustion chamber 222. That is, substantially, the entire member of internal perspiration 332 can be configured with a perforated / porous structure such that substantially the entire length of the combustion chamber 222 is cooled by perspiration. More particularly, in some respects, the cumulative perforation / pore area can be substantially equal to the surface area of the internal sweat member 332. That is, the ratio of the pore area to the total wall area (% porosity) can be in the order of, for example, 50%. In still other aspects, the pores / perforations may be separated at an appropriate density in such a way that substantially uniform distribution of the transpiration substance from the internal transpiration member 332 in the combustion chamber 222 is obtained (i.e., without "dead spots" where the flow or presence of transpiration substance 210 is missing). In one example, the internal sweat member 332 may include a pore / perforation arrangement in the order of 250 x 250 by 6.45 square centimeters, in order to provide about 9,689 pores / cm2 with such pores / perforations being separated by about 0.1 mm (about 0.004 inch). One skilled in the art will appreciate that, in the meantime, the configuration of the pore arrangement can be varied as appropriate, in order to be adaptable to other system configuration parameters or to obtain a desired result such as, for example, a pressure drop against flow rate desired by the sweating member 230. In an additional example, the pore arrangement can vary in size from about 10 x 10 by 6.45 square centimeters to about 10,000 x 10,000 by 6.45 square centimeters, with percentages porosity ranging from about 10% to about 80%.
[00036] Figures 3A and 3B illustrate that in an aspect of a combustion device 220, the structure that defines the combustion chamber 222 can be formed through an adjustment with "hot" interference between the transpiration member 230 and the surrounding structure such as pressure containment member 338 or insulation layer 339 disposed between sweat member 230 and pressure containment member 338. For example, when relatively "cold", sweat member 230 can be sized to be smaller, radially and / or axially, in relation to the surrounding pressure retaining member 338. Thus, when inserted into the pressure retaining member 338, a radial and / or axial gap may be present between both (see, for example, Figure 3A). Naturally, such dimensional differences can facilitate the insertion of the sweat member 230 into the pressure containment member 338. However, when heated, for example, towards the operating temperature, the sweat member 230 can be configured to expand radially and / or axially to reduce or eliminate the noticed intervals (see, for example, Figure 3B). In doing so, an axial and / or radial interference fit can be formed between the sweat member 230 and the pressure containment member 338. In cases involving a sweat member 230 with an outer sweat member 331 and a limb internal sweat 332, such interference fit can put the internal sweat member 332 under compression. In this way, suitable fragile materials resistant to high temperature such as a porous ceramic can be used to form the internal perspiration member 332.
[00037] With the internal sweat member 332 configured, the sweat substance 210 may comprise, for example, carbon dioxide (i.e., from the same source as the working fluid 236) directed through the internal sweat member 332 of such so that the sweat substance 210 forms a buffer layer 231 (i.e., a "vapor wall") immediately adjacent to the internal sweat member 332 within the combustion chamber 222, where the buffer layer 231 can be configured to buffer the interaction between the internal sweat member 332 and the liquefied non-combustible elements and heat associated with the combustion product. That is, in some cases, the transpiration fluid 210 may be delivered through the internal transpiration member 332, for example, at least at the pressure inside the combustion chamber 222 at which the flow rate of the transpiration fluid 210 (i.e. , CO2 stream) in the combustion chamber 222 is sufficient for the transpiration fluid 210 to mix with and cool the combustion products to form a mixture of outlet fluid at a temperature sufficient in relation to the need to enter the subsequent downstream process ( (ie, a turbine may require an inlet temperature of, for example, about 1,225 ° C), but where the outlet fluid mixing temperature remains high enough to keep droplets of dross or other contaminants in the fuel in a fluid or liquid state. The liquid state of the non-combustible elements of the fuel can facilitate, for example, the separation of such contaminants from the combustion product in liquid form, preferably in a low viscosity form of free flow that will be more difficult to obstruct or otherwise damage any system removal system implanted for such separation. In practice, such needs may depend on several factors such as the type of solid carbonaceous fuel (ie, coal) employed and the particular characteristics of the slag formed in the combustion process. That is, the combustion temperature within the combustion chamber 222 is preferably such that any non-combustible elements in the carbonaceous fuel are liquefied within the combustion product.
[00038] In particular aspects, the porous internal transpiration member 332 is therefore configured to direct the fluid / transpiration substance in the combustion chamber 222 in a radially inward manner to form a fluid barrier wall or buffer layer 231 around the surface of the internal transpiration member 332 that defines the combustion chamber 222 (see, for example, Figure 2). In a particular aspect, the porous internal transpiration member 332 is therefore configured to direct the transpiration fluid in the combustion chamber 222 in such a way that the transpiration substance 210 enters the combustion chamber 222 at a substantially right angle ( 90 °) in relation to the internal surface of the internal sweating member 332. Among other advantages, the introduction of sweating substance 210 at a substantially right angle to the internal sweating member 332 can facilitate or otherwise improve the effect of directing the liquid or solid droplets of slag or other contaminants or vortexes of hot combustion fluid out of the internal surface of the internal sweating member 332. Reducing, minimizing or preventing another form of contact between the liquid or solid droplets of slag and the member internal sweating agent 332 can, for example, prevent the coalescence of such contaminants in droplets or ma larger crossings, which is known to happen by the contact between droplets / particles and solid walls and which can cause damage to the internal sweating member 332. The introduction of sweating substance 210 at a substantially right angle to the internal sweating member 332 it can therefore facilitate or otherwise improve the prevention of the formation of combustion fluid vortexes close to the internal transpiration member 332 with speed or moment to collide with and potentially damage the internal transpiration member 332.
[00039] As previously revealed, it may be advantageous, in other cases, to induce eddy or other disturbance to the uniform straight flow in the fuel / fuel mixture with the fuel / fuel mixture being directed in the combustion chamber 222. By obtaining such a disturbance flow after the fuel / fuel mixture has been delivered to the combustion chamber 222, disadvantages associated with nozzles or other burner devices or delivery devices used to cause such a flow disturbance before the fuel / fuel mixture is delivered to the fuel chamber combustion 222 can be avoided or minimized. However, one skilled in the art will appreciate that in some cases such as post-introduction of the fuel / fuel mixture it may sometimes be necessary and / or desired in conjunction with such disruptive fuel / fuel mixture delivery devices pre-introduction flow.
[00040] Thus, in some aspects of the present disclosure, at least the internal transpiration member 332 can be configured to substantially uniformly direct the transpiration fluid 210 through it towards the combustion chamber 222 such that the fluid sweat 210 is directed to flow helically (see, for example, Figure 2E) around perimeter 221 (see, for example, Figure 2A) thereon and longitudinally between inlet portion 222A and outlet portion 222B, to form the fluid barrier wall or buffer layer 231 around the surface of the internal sweat member 332 to buffer the interaction between the sweat member 332 and the combustion products and / or the fuel mixture. More particularly, in some aspects, at least the internal transpiration member 332 is configured to direct the transpiration fluid 210 through it and into the combustion chamber 222, substantially uniformly around the perimeter 221 thereof and longitudinally between the portion inlet 222A and outlet portion 222B such that the transpiration fluid 210 is directed to flow substantially tangent to the perimeter 221 of the internal transpiration member 332 and helically (i.e., in a spiral or coil shape) around the even as shown, for example, in Figures 2A and 2E. For example, the pores / perforations 335 defined by the internal transpiration member 332 can be arched or angled when they are extended between the external surface and the internal surface of the same (see, for example, Figure 2A) in order to direct the fluid from transpiration 210 flowing through it substantially tangentially to or otherwise along the perimeter 221 of the combustion chamber 222.
[00041] In another example, pores along longitudinal strips of the internal transpiration member 332 can be fused / closed in order to facilitate the transpiration fluid 210 to flow through it substantially tangentially to or otherwise along the perimeter 221 of combustion chamber 222 (see, for example, Figure 2C). In other cases, other than to or instead of fusing the longitudinal strips of the internal sweat member 332, the shield structure 224 (i.e., a metal or ceramic shield arrangement) can be arranged / inserted in relation to the member internal sweat surface 332 as shown, for example, in Figure 2C, in order to block porous wall surfaces in particular to prevent radial flow through it without blocking other surfaces that facilitate the flow of sweating fluid 210 substantially tangentially to or otherwise along the perimeter 221 of the combustion chamber 222 (see, for example, Figures 2C and 2D). Although the structure 224 or the melting process can be configured to direct the transpiration fluid 210 substantially tangentially to or otherwise along the perimeter 221 of the combustion chamber 222, since the flow of the same interacts with the flow combustion, the sum vector of the flow will become substantially helical. One skilled in the art, however, will appreciate that there may be many other ways in which it is possible to configure the internal transpiration member 332 to obtain the flow of the transpiration fluid 210 substantially tangentially or otherwise along the perimeter 221 of the combustion chamber 222.
[00042] In yet another example, the pores / perforations 335 can be configured to give a Coanda effect to the transpiration fluid 210 (see, for example, Figure 2F) directed through it in order to direct the transpiration fluid 210 that flows through it substantially tangentially to or otherwise along the perimeter 221 of the combustion chamber 222. In such circumstances, the flow of the fuel / fuel mixture and / or the combustion products from the inlet portion 222A towards to the outlet portion 222B can cause the flow of the transpiration fluid 210 to be directed longitudinally in a similar manner towards the outlet portion 222B to thereby effect the helical or spiral flow of the transpiration fluid 210 through the chamber combustion 222. In such circumstances, the pores / perforations 335 defined by the internal transpiration member 332 may extend through it substantially perpendicular to the geometrical axis longitudinal richness of combustion chamber 222 as shown, for example, in Figure 2. However, in other cases, pores / perforations 335 can be angled towards outlet portion 222B (see, for example, Figure 2B) to promote the helical / spiral flow of the sweating fluid 210 and / or mixing with the fuel / combustion products mixture or the pores / perforations 335 can be angled towards the inlet portion 222A (not shown) to otherwise affect the interaction between the transpiration fluid 210 and the fuel mixture and / or the combustion products (i.e., promoting mixing or controlling the rate of combustion). Consequently, such manipulation of the flow of the fuel / combustion product mixture through the combustion chamber 222 can provide desired effects on and control the combustion characteristics and / or kinetics during the combustion process, in some cases, without a physical device. that otherwise affects the substantially straight and uniform flow of the fuel / fuel mixture in the combustion chamber 222. Such an arrangement, namely the absence of physical devices to affect the flow of the fuel / combustion products, may otherwise be advantageous, for example, in the elimination of accumulation sites for particulates contained in the fuel mixture and / or in the combustion products as will be appreciated by one skilled in the art.
[00043] When manipulating the flow of the fuel / combustion products mixture in order to check or otherwise induce a swirl of it inside the combustion chamber 222, the burner device 300 and / or the transpiration member 230 can be configured in different layouts. For example, in one aspect, the burner device 300 can be configured to receive the fuel / fuel mixture from the mixing arrangement 250 and to direct the fuel / fuel mixture in the inlet portion 222A of the combustion chamber 222 in a direction of flow generally opposite to the helical flow of the transpiration fluid 210. In another aspect, the burner device 300 can be configured to receive the fuel / fuel mixture from the mixing arrangement 250 and to direct the fuel / fuel mixture at the inlet portion 222A of the combustion chamber 222 in a direction consistent with (i.e., in the same direction as) the helical flow of the transpiration fluid 210. In yet another aspect, the burner device 300 can be configured to receive the fuel / fuel mixture from the mixing arrangement 250 and to direct the substantially uniform linear flow of the fuel / mixture fuel in the inlet portion 222A of the combustion chamber 222, wherein the helical flow of the transpiration fluid 210 is configured to induce eddy of the fuel / fuel mixture and / or the combustion products within the combustion chamber 222.
[00044] Each such provision may have a separate purpose and / or effect. For example, directing the flow of the fuel / fuel mixture in a direction opposite to the helical flow of the transpiration fluid 210 may slow down or stop the eddy induced in the fuel / fuel mixture due to friction between the opposing flows. Thus, combustion of the fuel / fuel mixture can also be slowed down. Conversely, if the fuel / fuel mixture is directed in the same direction as the helical flow of the transpiration fluid 210, the eddy of the fuel / fuel mixture and / or the combustion products can be improved, which possibly shortens the time required for substantially complete combustion of the fuel / fuel mixture or otherwise increases the proportion of the fuel / fuel mixture combusted during (ie, increases the rate of exhaustion of the fuel). Directing the fuel / fuel mixture in a substantially uniform linear flow can be advantageous, for example, when the fuel / fuel mixture includes solids or other particulates as previously revealed, since the flow is not impeded by mechanical devices and in that the desired swirl of the same can then be induced by the helical flow of the transpiration fluid 210 to improve its combustion.
[00045] Consequently, such effects can, in some respects, be combined to improve the efficiency of the combustion apparatus 220. For example, as shown in Figure 2E, the combustion chamber 222 may include a combustion section 244A arranged towards the portion inlet 222A and an afterburner section 244B arranged towards outlet portion 222B, where the transpiration member 230 can be configured such that the helical flow of the transpiration fluid 210 over the afterburner section 244B is opposed to the helical flow of transpiration 210 over the combustion section 244A in order to reverse the induced eddy of the combustion product in the post-combustion section 244B with respect to the induced eddy of the fuel / fuel mixture in the combustion section 244A. In such circumstances, the fuel / fuel mixture can be directed in the combustion section 244A of the combustion chamber 222 in the same direction as the helical flow of the transpiration fluid 210 in order to improve its combustion as previously discussed. The reversal of the helical flow direction of the transpiration fluid 210 in the post-combustion section 244B can, for example, effect a "whirlwind" in the combustion products by increasing the local shear and thereby improving the mixture of the combustion products . In doing so, combustion products can be mixed faster and more completely into the outlet flow stream of outlet portion 222B in order to provide a more homogeneous outlet flow stream from combustion apparatus 220.
[00046] In additional aspects, the transpiration member 230 can be configured in such a way that the helical flow of the transpiration fluid 210 is alternately reversed along at least one section of it so as to alternately reverse the induced eddy of the fuel / fuel mixture and / or combustion products between inlet portion 222A and outlet portion 222B. Such an alternating helical flow section opposite to the transpiration fluid 210 may, for example, increase local turbulence and therefore increase the fuel / fuel mixture and / or combustion products mixture. In some cases, for example, to further increase such local turbulence to induce other changes in dynamics, combustion kinetics and / or the flow path within or through the combustion chamber 222, the transpiration member 230 may additionally include at least one transpiration port 246 (see, for example, Figure 2G) extending through it where at least one transpiration port 246 can be configured to direct an additional linear flow of transpiration fluid 210 into the fuel / fuel mixture and / or in combustion products so as to possibly affect fluid characteristics as well as dynamics and kinetics of combustion. In some respects, a properly configured jet of transpiration fluid directed through at least one laterally extending transpiration port 246 may be sufficient to branch the flow into the combustion chamber 222 or otherwise make the flow " about "around the perspiration fluid jet, which allows the flow to be formatted along the length of the combustion chamber 222. Where more than one of such perspiration ports 246 are used, the perspiration ports 246 can be separated, angular and / or longitudinally in relation to the combustion chamber 222 in order, for example, to move regions of higher temperature combustion to other sectors within the combustion chamber 222 (that is, to avoid localized heating or overheating of certain sectors of the combustion chamber 222) or induce mixing between different combustion regions that have different temperatures.
[00047] In some cases, the external sweat member 331, the pressure containment member 338, the heat transfer jacket 336 and / or the insulation layer 339 can be configured, either individually or in combination, to provide a "collector" effect (i.e., to provide a substantially uniformly distributed supply) in relation to the delivery of the transpiration substance / fluid 210 to and through the internal transpiration member 332 and into the combustion chamber 222. That is, a substantially uniform (in terms of flow rate, pressure or any other appropriate and appropriate measurement) of the transpiration substance 210 in the combustion chamber 222 can be obtained by the configuration of the external transpiration member 331, the pressure containment member 338, the liner heat transfer 336 and / or insulation layer 339 to provide a uniform supply of sweat 210 to the internal sweat member 332 or the supply All of the transpiration substance 210 around the outer surface of the internal transpiration member 332 can be particularly customized and configured in such a way that the substantially uniform distribution of the transpiration substance 210 inside, around or along the combustion chamber 222 is obtained . Such substantially uniform distribution and supply of the transpiration substance 210 in the combustion chamber 222 can minimize or prevent the formation of hot combustion fluid vortices, since such hot combustion fluid vortices can be formed otherwise through the interaction between the flow of non-uniform sweating fluid and the flow of combustion fluid and such vortices can, in turn, collide with and potentially damage the internal sweating member 332. In some respects, the uniformity of the distribution of the sweating substance 210 within combustion chamber 222 is desirable in at least one local manner or frame of reference. That is, over relatively long distances along the combustion chamber 222, the uniformity of the flow of the substance / transpiration fluid 210 may vary, but it may be desirable and / or necessary for the flow to vary smoothly to avoid discontinuities in the flow profile that can be conducive to the formation of potentially harmful vortexes.
[00048] The surface of the internal sweat member 332 is also heated by combustion products. Thus, the porous internal perspiration member 332 can be configured to have adequate thermal conductivity in such a way that the transpiration fluid 210 that passes through the internal perspiration member 332 is heated while the porous internal perspiration member 332 is simultaneously cooled, which results in the surface temperature of the internal transpiration member 332 that defines the combustion chamber 222, for example, between about 200 ° C to about 700 ° C (and, in some cases, up to about 1,000 ° C ) in the region with the highest combustion temperature. The fluid barrier wall or buffer layer 231 formed by the transpiration fluid 210 in cooperation with the internal transpiration member 332, therefore, buffers interaction between the internal transpiration member 332 and the high temperature combustion products and the slag or other contaminating particles and thus buffer the internal sweat member 332 from contact, encrustation, or other damage. In addition, the transpiration fluid 210 introduced into the combustion chamber 222 through the internal transpiration member 332 in such a way as to regulate an outflow mixture of the transpiration fluid 210 and combustion products around the outlet portion 222B of the combustion chamber 222 at a temperature of about 400 ° C to about 3,500 ° C.
[00049] One skilled in the art will appreciate that the reference to a mixture of the transpiration fluid 210 and combustion products around the outlet portion 222B of the combustion chamber 222 at a temperature of about 400 ° C at about 3,500 ° C does not necessarily indicate that the temperature of the outlet mixture reaches the maximum at the outlet of the outlet portion 222B of the combustion chamber 222. In practice, the temperature of the combustion will always reach a much higher temperature somewhere along the length between the inlet portion 222A and the outlet portion 222B of the combustion chamber 222 as illustrated schematically, for example, in Figure 1A (with a relative temperature plotted along the y axis and a relative position along the combustion between the input portion and the output portion plotted along the geometric axis x). In general, it may be desirable to obtain a temperature high enough to complete the combustion process in the combustion chamber 222 quickly enough so that the reaction is complete before the outlet mixture leaves the combustion chamber 222. After the temperature peak temperature is obtained inside the combustion chamber 222, the temperature of the outlet mixture may, in some cases, drop due to the dilution of the substance / transpiration fluid 210.
[00050] According to certain aspects, a transpiration fluid 210 suitable for implantation in a combustion device 220 as disclosed herein can include any appropriate fluid capable of being supplied in a flow of sufficient quantity and pressure through the internal transpiration member 332 to form the fluid barrier wall / buffer layer 231 and capable of diluting the combustion products to produce a suitable final outlet temperature of the working fluid / combustion outlet stream. In some aspects, CO2 can be a suitable transpiration fluid 210 in which the fluid barrier / buffer layer formed therewith can demonstrate good thermal insulation properties as well as desirable UV light and visible light absorption properties. If implanted, CO2 is used as a supercritical fluid. Other examples of a suitable transpiration fluid include, for example, H2O or cooled combustion product gases recycled from downstream processes. Some fuels can be used as transpiration fluids during the start of the combustion apparatus to obtain, for example, appropriate operating temperatures and pressures in the combustion chamber 222 before injecting the fuel source used during operation. Some fuels can also be used as the transpiration fluid to adjust or maintain the operating temperatures and pressures of the combustion apparatus 220 during switching between fuel sources such as when switching from coal to biomass as the fuel source. In some ways, two or more perspiration fluids can be used. The transpiration fluid 210 can be optimized for the temperature and pressure conditions of the combustion chamber 222 where the transpiration fluid 210 forms the fluid barrier / buffer layer 231.
[00051] Aspects of the present disclosure for providing apparatus and methods for producing power such as electrical power through the use of a high efficiency fuel combustion device 220 and an associated working fluid 236. Working fluid 236 is introduced to the combustion apparatus 220 together with an appropriate fuel 254 and an oxidizer 242 and any associated materials that may also be useful for efficient combustion. In particular aspects, the deployment of a combustion device 220 configured to operate at relatively high temperatures (for example, in the range of about 1,300 ° C to about 5,000 ° C), the working fluid 236 can facilitate temperature moderation of a fluid stream leaving the combustion apparatus 220 so that the fluid stream can be used for extracting energy from it for power generation purposes.
[00052] In certain aspects, a transpiration-cooled combustion apparatus 220 can be implanted in a power generation system that uses a circulating working fluid 236 that comprises, for example, predominantly CO2 and / or H2O. In one aspect in particular, the working fluid 236 entering the combustion apparatus 220 preferably substantially comprises only CO2. In the combustion apparatus 220 operating under oxidizing conditions, the working fluid CO2 236 can be mixed with one or more components of fuel 254, an oxidizer 242 and any products of the fuel combustion process. Therefore, the working fluid 236 directed towards the outlet portion 222B of and exiting the combustion apparatus 220, which can also be referred to herein as an outlet fluid stream can comprise, as shown in Figure 1, predominantly CO2 (in cases where the working fluid is predominantly CO2) together with smaller amounts of other materials such as H2O, O2, N2, argon, SO2, SO3, NO, NO2, HCl, Hg and traces of other components that may be products of the combustion process (for example, particulates or contaminants such as ash or liquefied ash). See element 150 in Figure 1. The operation of the combustion device 220 under conditions of reduction can result in an output fluid stream with a different list of possible components including CO2, H2O, H2, CO, NH3, H2S, COS, HCl , N2 and argon as shown in element 175 in Figure 1. As discussed in further detail in this document, the combustion process associated with the combustion apparatus 220 can be controlled in such a way that the nature of the outlet fluid stream can be reduced or oxidant, in which any case can provide particular benefits.
[00053] In particular aspects, the combustion apparatus 220 can be configured as a high-efficiency combustion device cooled by transpiration capable of providing relatively complete combustion of a fuel 254 at a relatively high operating temperature, for example, in the range of about from 1,300 ° C to about 5,000 ° C. Such combustion apparatus 220 may, in some cases, implant one or more cooling fluids and / or one or more transpiration fluids 210. In addition to combustion apparatus 220, additional components can also be implanted. For example, an air separation unit can be provided to separate N2 and O2 and a fuel injector device can be provided to receive O2 from the air separation unit and combine O2 with CO2 and / or H2O and a fuel stream which comprises a gas, a liquid, a supercritical fluid or a particulate combustible liquid slurry in a high density CO2 fluid.
[00054] In another aspect, the transpiration-cooled combustion apparatus 220 may include a fuel injector for injecting a pressurized fuel stream into the combustion chamber 222 of the combustion apparatus 220, wherein the fuel stream may comprise a processed carbonaceous fuel 254 , a fluidizing medium 255 (which may comprise working fluid 236 as discussed in this document) and oxygen 242. Oxygen (enriched) 242 and CO2 working fluid 236 can be combined as a homogeneous supercritical mixture. The amount of oxygen present can be sufficient to burn the fuel and produce combustion products that have a desired composition. The combustion apparatus 220 may also include a combustion chamber 222 configured as a high pressure and high temperature combustion volume to receive the fuel stream as well as a transpiration fluid 210 that enters the combustion volume through the walls of a limb. porous transpiration 230 that defines the combustion chamber 222. The transpiration fluid feed rate 210 can be used to control an inlet temperature of the exhaust portion / turbine portion of the combustion apparatus to a desired value and / or to cool the sweat member 230 to a temperature compatible with the material that forms sweat member 230. Sweat fluid 210 directed through sweat member 230 provides a fluid / buffer layer on the surface of sweat member 230 that defines the sweat member combustion 222, in which the fluid / buffer layer can prevent ash particles or liquid slag that results from a certain c fuel ombustão interact with the exposed walls of the transpiration member 230.
[00055] Aspects of a high-efficiency combustion device can also be configured to operate with a variety of fuel sources that include, for example, varying degrees and types of coal, wood, oil, fuel oil, natural gas, fuel gas based on coal, tar sand tar, bitumen, biofuel, biomass, algae and residues of graduated combustible solid waste. In particular, a charcoal powder or particulate solid can be used. Although an exemplary coal burning combustion apparatus 220 is disclosed herein, one skilled in the art will appreciate that the fuel used in the combustion apparatus 220 is not limited to a specific grade of coal. In addition, due to the high pressures and high temperatures maintained by the oxygen-fueled combustion apparatus disclosed in this document, a wide variety of fuel types can be deployed that include coal, bitumen (which includes bitumen derived from tar sands), tar, asphalt, used tires, fuel oil, diesel, gasoline, jet fuel (JP-5, JP-4), natural gas, gases derived from the gasification or pyrolysis of hydrocarbonaceous material, ethanol, solid and liquid biofuels, biomass, algae and debris or processed solid waste. All such fuels are properly processed to allow injection into the combustion chamber 222 at sufficient rates and pressures above the pressure within the combustion chamber 222. Such fuels can be in liquid form, slurry, gel, or slurry and appropriate viscosity at room temperature or at elevated temperatures (for example, between about 38 ° C to about 425 ° C). Any solid combustible materials are ground or crushed or otherwise processed to reduce particle sizes as appropriate. A slurry or slurry fluidization medium can be added, as needed, to obtain a suitable shape and to meet flow requirements for high pressure pumping. Of course, a fluidization medium may not be necessary depending on the shape of the fuel (ie, liquid or gas). Similarly, the circulating working fluid can be used as the fluidizing medium in some aspects.
[00056] In some respects, combustion chamber 222 is configured to withstand a combustion temperature of about 1,300 ° C to about 5,000 ° C. The combustion chamber 222 can be further configured in such a way that the fuel stream (and working fluid 236) can be injected or otherwise introduced into the combustion chamber 222 at a pressure greater than that in which combustion occurs. Where a coal particulate is the carbonaceous fuel, the coal particles can become liquid slurry in a supercritical CO2 fluid or water, formed by a mixture of liquid CO2 or water with the ground solid fuel to form a pumpable slurry. In such circumstances, liquid CO2 can have a density, for example, in the range of about 450 kg / m3 to about 1,100 kg / m3 and the mass fraction of solid fuel can be in the range of about 25% to about 95% (for example, between about 25% by weight and about 55% by weight). Optionally, an amount of O2 can be mixed with the carbon / CO2 slurry sufficient to burn the coal to produce the desired composition of the combustion products. Optionally, the O2 can be injected separately into the combustion chamber 222. The combustion apparatus 220 may include a pressure containment member 338 that at least partially surrounds the transpiration member 230 that defines the combustion chamber 230 in which an insulating member 339 can be arranged between the pressure containment member 338 and the sweat member 230. In some cases, a heat removal device 350 such as a jacketed water cooling system that defines circulating water sleeves 337 can be engaged when pressure containment member 338 (i.e., external to the pressure containment member 338 that forms the "housing" of the combustion apparatus 220). The transpiration fluid 210 implanted in connection with the transpiration member 230 of the combustion apparatus 220 can be, for example, CO2 mixed with smaller amounts of H2O and / or an inert gas such as N2 or argon. The sweat member 230 may comprise, for example, a porous metal, a ceramic, a composite matrix, a layered collector, any other suitable structure or combinations thereof. In some aspects, combustion within the combustion chamber 222 can produce a stream of high pressure, high temperature outlet fluid that can subsequently be directed to a power generating apparatus such as a turbine for expansion therefrom.
[00057] Regarding the aspects of the apparatus illustrated in Figure 1, the combustion apparatus 220 can be configured to receive oxygen 242 at a pressure of about 35.5 MPa (355 bar). In addition, particulate solid fuel (for example, pulverized coal) 254 and fluidizing fluid (for example, liquid CO2) 255 can also be received at a pressure of about 35.5 MPa (355 bar). Similarly, the working fluid (eg heated, high pressure, possibly recycled, CO2 fluid) 236 can be supplied at a pressure of about 35.5 MPa (355 bar) and a temperature of around 835 ° Ç. According to aspects of the present disclosure, however, the fuel mixture (fuel, fluidization fluid, oxygen and working fluid) can be received at the inlet portion 222A of the combustion chamber 222 at a pressure of about 4 MPa (40 bar) to about 50 MPa (500 bar). The relatively high pressures deployed by the aspects of the combustion apparatus 220 as disclosed herein can function to concentrate the energy produced thereby to a relatively high intensity in a minimal volume, which essentially results in a relatively high energy density. The relatively high energy density allows processing downstream of this energy to be carried out in a more efficient manner than at lower pressures and therefore provides a viability factor for the technology. Aspects of the present disclosure can therefore provide an energy density higher by orders of magnitude than existing power plants (ie, 10 to 100 times). The higher energy density increases the efficiency of the process, but also reduces the cost of the equipment needed to implement the transformation from thermal energy to electricity by reducing the size and mass of the equipment and, therefore, the cost of the equipment.
[00058] When implanted, the CO2 fluidization fluid 255 which is a liquid at any pressure between the triple pressure point of CO2 and the critical pressure of CO2 is mixed with the pulverized coal fuel 254 to form a mixture in the proportion of about 55% CO2 and about 45% coal pulverized by mass or other fraction of mass such that the resulting slurry can be pumped by a suitable pump (such as a slurry fluid) into the combustion chamber 222 in the perceived pressure about 35.5 MPa (355 bar). In some respects, CO2 and pulverized coal can be mixed before pumping at a pressure of about 1.3 MPa (13 bar). The O2 stream 242 is mixed with the recycle CO2 working fluid stream 236 and this combination is then mixed with the pulverized coal / CO2 slurry to form a single fluid mix. The O2 to coal ratio can be selected to be sufficient to completely burn the coal with an additional 1% excess O2. In another aspect, the amount of O2 can be selected to allow one portion of the coal to be substantially completely oxidized while another portion is only partially oxidized which results in a fluid mixture that is reducing and that includes some H2 + CO + CH4. In such a way, a two-stage expansion of the combustion products can be implemented as needed or desired with some injection of O2 and reheating between the first and second stages. In addition, since the fuel (coal) is only partially oxidized in the first stage (ie a first combustion chamber at a temperature of about 400 ° C to about 1,000 ° C), any non-combustible elements in the carbonaceous fuel that leaves the first stage are formed as solid particles within the combustion products. After filtering the solid particles, for example, by vortex and / or spark plug filters, the carbonaceous fuel can then be substantially completely oxidized in the second stage (ie a second combustion chamber) in order to produce a temperature final product of combustion from about 1,300 ° C to about 3,500 ° C.
[00059] In additional aspects, the amount of CO2 present in the combustion chamber 222 through the fuel mixture is selected to be sufficient to obtain the combustion temperature (adiabatic or otherwise) of about 2,400 ° C, although the temperature combustion can be in the range of about 1,300 ° C to about 5,000 ° C. The O2 fuel mixture + heated carbon slurry + heated recycling CO2 is supplied, in one aspect, at a resulting temperature below the auto-ignition temperature of that fuel mixture. To obtain the indicated conditions, the solid carbonaceous fuel (for example, coal) is preferably supplied at an average particle size of about 50 microns to about 200 microns, for example, by grinding the solid coal in a coal mill. Such a grinding process can be carried out on a machine configured to provide a minimum particle mass fraction below about 50 microns. In this way, any non-combustible elements that are liquefied to form the droplets of liquid slag in the combustion process can be larger than about 10 microns in diameter. In some respects, the fuel mixture comprising the slurry of CO2 + O2 + pulverized coal at a temperature of about 400 ° C can be directed in the combustion chamber 222 at a pressure of about 35.5 MPa (355 bar ), where the net combustion pressure within the combustion chamber 222 can be about 35.4 MPa (354 bar). The temperature inside the combustion chamber 222 can range from about 1,300 ° C to about 5,000 ° C and, in some preferred aspects, only a single combustion stage is implanted.
[00060] In an example of a 220 combustion device as disclosed in this document, a 500 MW net electric power system can be configured to operate with CH4 fuel at an efficiency (based on lower heating value) of about 58% under the following conditions: Combustion pressure: 350 atm Fuel insertion: 862 MW Fuel flow: 17.2 kg / second Oxygen flow: 69.5 kg / second CH4 and O2 are mixed at 155 kg / second of fluid CO2 and fuel working to produce the output fluid stream comprising CO2, H2O and some excess O2 at an adiabatic temperature of 2,400 ° C. The combustion chamber can have an internal diameter of about 1 m and a length of about 5 m. A flow of 395 kg / second of CO2 at a temperature of about 600 ° C is directed to the sweat member which can be about 2.5 cm thick and is directed through the sweat member. This CO2 is heated convectively from the heat conducted through the sweat member that originates from the irradiation of combustion within the combustion chamber to the sweat member.
[00061] Around the internal surface of the same that defines the combustion chamber, the surface temperature of the transpiration member can be about 1,000 ° C, while the output fluid stream of 636.7 kg / second can be at a temperature of about 1,350 ° C. In such circumstances, the average residence time for combustion and dilution of combustion products is about 1.25 seconds. In addition, the average inward radial velocity for the transpiration fluid entering the combustion chamber through the transpiration member is approximately 0.15 m / s.
[00062] The amendment to the example for a coal-fired combustion apparatus results in a configuration with an average residence time for combustion and dilution of the combustion products in the combustion chamber of about 2.0 seconds and a combustion chamber length of about 8 m with an internal diameter of about 1 m. The net efficiency of the system with CO2 as the dilution fluid (transpiration) is therefore about 54% (based on the lowest heating value). In such circumstances, the speed radially into the transpiration fluid can be about 0.07 m / s. Under such conditions, Figure 5 shows a schematic trajectory of a 50 micron diameter liquid slag particle projected radially outward at about 50 m / s towards the transpiration member from a distance of 1 mm from the same. As illustrated, the particle would reach a minimum of 0.19 mm from the sweat member before being transported in the outflow fluid stream by the sweat fluid flow through the sweat member. In such circumstances, the flow of sweat fluid through the sweat member effectively buffers the interaction between the sweat member and the liquid slag particles that result from the combustion process.
[00063] The aspects of the revealed combustion apparatus can be implanted in suitable power production systems by using associated methods as will be appreciated by one skilled in the art. For example, such a power generation system may comprise one or more injectors to supply fuel (and optionally a fluidizing medium), an oxidizer and a CO2 working fluid; a perspiration-cooled combustion apparatus as disclosed herein that has at least one combustion stage to combust the fuel mixture and provides an outlet fluid stream. A transformation apparatus (see, for example, element 500 in Figure 6) can be configured to receive the output fluid stream (combustion products and working fluid) and to be responsive to the output fluid stream to transform associated energy at the same time in kinetic energy, in which the transformation apparatus can be, for example, a force producing turbine that has an inlet and an outlet and in which the force is produced as the output fluid stream expands. More particularly, the turbine can be configured to maintain the outlet fluid stream at a desired pressure ratio between the inlet and the outlet. A generating device (see, for example, element 550 in Figure 6) can also be provided to transform the turbine's kinetic energy into electricity. That is, the outlet fluid stream can be expanded from high pressure to low pressure to produce shaft force which can then be converted to electrical force. A heat exchanger can be provided for cooling the outlet fluid stream from the outlet turbine outlet and for heating the CO2 working fluid entering the combustion apparatus. One or more devices can also be provided to separate the stream of outlet fluid leaving the heat exchanger into pure CO2 and one or more additional components for recovery or disposal. Such a system may also comprise one or more devices for compressing the purified CO2 and for delivering at least a portion of the CO2 separated from the outlet fluid stream into a pressurized pipeline while the remaining portion is recycled as the working fluid is heated by the exchanger. of heat. One skilled in the art, however, will appreciate that although the present disclosure involves direct implantation of the outlet fluid stream, in some cases, the relatively high temperature of the outlet fluid stream can be implanted indirectly. That is, the outlet fluid stream can be directed to a heat exchanger where the thermal energy associated with it is used to heat a second stream of working fluid and the second stream of heated fluid is then directed for a transformer device (for example, a turbine) to generate power. Additionally, one skilled in the art will appreciate that many other such provisions may be within the scope of the present disclosure.
[00064] In particular aspects of the development, the composition of the carbonaceous fuel is such that non-combustible elements (ie contaminants) can be included in it and remain present in the combustion products / outlet fluid stream after the process of combustion. This may be the case where the carbonaceous fuel is a solid such as coal. In these respects, direct implantation of the outlet fluid stream may result in the accumulation of such non-combustible elements in or other damage to the subsequent transformation apparatus (turbine) if the outlet fluid stream is channeled directly to it. One skilled in the art will also appreciate that such non-combustible elements may not necessarily be present when implanting other forms of carbonaceous fuel such as a liquid or gas (ie, natural gas). Consequently, in aspects that implant a source of solid carbonaceous fuel and a direct interaction between the outlet fluid stream and the transformation apparatus, the power system (combustion apparatus and transformation apparatus) may additionally include a separator apparatus disposed between the combustion apparatus and transformation apparatus. In such circumstances, the separator apparatus may be configured to substantially remove liquefied non-combustible elements from the combustion products / outlet fluid stream received therewith before the combustion products / outlet fluid stream are directed to the transformation apparatus. In addition, in aspects that implant a separating device, the revealed perspiration substance can be introduced both upstream and downstream of the separating device. More particularly, the transpiration substance can be introduced into the combustion chamber first through the transpiration member and upstream of the separating apparatus in order to regulate a mixture of the transpirating substance and combustion products entering the separating apparatus above a temperature liquidation of non-combustible elements. Subsequent to the separator, a perspiration delivery device (see, for example, element 475 in Figure 6) can be configured to deliver the perspiration substance to the combustion products that come out of the separator and that have the non-combustible elements liquefied substantially removed therefrom to regulate a mixture of the sweat substance and the combustion products that enter the processing apparatus at a temperature of about 400 ° C to about 3,500 ° C.
[00065] As previously discussed, aspects of the combustion apparatus may include the ability to obtain the combustion temperature that causes the non-combustible elements in the solid carbonaceous fuel to be liquefied during the combustion process. In such circumstances, provisions for removing the liquefied incombustible elements can be applied such as, for example, a separator apparatus 340 such as a cyclonic separator as shown in Figure 4. Generally, aspects such as a cyclonic separator implanted by the present disclosure may comprise a plurality of centrifugal separator devices arranged in series 100 including an inlet centrifugal separator device 100A configured to receive the combustion products / outlet fluid stream and the liquefied incombustible elements associated therewith and an output centrifugal separator device 100B configured for exhaust the combustion products / outlet fluid stream that has the liquefied non-combustible elements substantially removed from it. Each centrifugal separator device 100 includes a plurality of centrifugal separator elements or cyclones 1 arranged operatively in parallel around a central collection pipe 2, wherein each centrifugal separator / cyclone element 2 is configured to remove at least a portion of the liquefied non-combustible elements. of the combustion products / outlet fluid stream and to direct the removed portion of the liquefied incombustible elements to a reservoir 20. Such a separator apparatus 340 can be configured to operate at a high pressure and thus can additionally comprise a pressure-containing housing 125 configured to house the centrifugal separator devices and the reservoir. According to such aspects, the pressure-containing housing 125 may be an extension of the pressure containment member 338 which also surrounds the combustion apparatus 220 or the pressure-containing housing 125 may be a separate member capable of engaging the pressure containment member pressure 338 associated with the combustion apparatus 220. In any case, due to the high temperature experienced by the separating apparatus 340 through the outlet fluid stream, the pressure-containing housing 125 may also include a heat dispersion system such as a transfer jacket of heat that has a liquid circulating in it (not shown) operationally coupled to it to remove heat from it. In some aspects, a heat recovery device (not shown) can be operationally engaged with the heat transfer jacket, where the heat recovery device can be configured to receive the liquid circulated in the heat transfer jacket and to recover thermal energy of that liquid.
[00066] More particularly, the separating apparatus (slag removal) 340 shown in Figure 4 is configured to be arranged in series with the combustion apparatus 220 around the outlet portion 222B thereof to receive the stream of outlet fluid / products combustion. The flow of outgoing fluid cooled by transpiration from the combustion apparatus 220 with the liquid droplet droplets (non-combustible elements) in it is directed to enter a central collector supply 2A of the centrifugal inlet separator device 100A through a conical reducer 10. In In one aspect, the separating apparatus 340 may include three centrifugal separating devices 100A, 100B, 100C (although one skilled in the art will appreciate that such a separating apparatus may include one, two, three or more centrifugal separating devices as needed or desired). In this case, the three centrifugal separator devices 100A, 100B, 100C arranged operationally in series provide a 3-stage cyclonic separation unit. Each centrifugal separating device includes, for example, a plurality of centrifugal separating elements (cyclones 1) arranged around the circumference of the corresponding central collecting pipe 2. The central collecting provisions 2A and the central collecting pipes 2 of the incoming centrifugal separating device 100A and the medial centrifugal separator device 100C are each sealed at the outlet end thereof. In such cases, the output fluid stream is directed in branch channels 11 that correspond to each of the centrifugal separator elements (cyclones 1) of the respective centrifugal separator device 100. The branch channels 11 are configured to engage the inlet end of the respective cyclone 1 to form a tangential inlet to it (which causes, for example, the stream of outgoing fluid entering cyclone 1 to interact with the wall of cyclone 1 in a spiral flow). The outlet channel 3 of each cyclone 1 is then routed to the inlet portion of the central collection tube 2 of the respective centrifugal separator device 100. In the centrifugal outlet separator device 100B, the outlet fluid stream (which has the non-combustible elements) substantially separated from it) is directed from the central collection tube of the centrifugal outlet separator device 100B and through a collection tube 12 and an outlet nozzle 5 such that the "clean" outlet fluid stream can then be directed for a subsequent process such as that associated with the transformation apparatus. An exemplary three-stage cyclonic separation arrangement, therefore, allows slag removal to reduce to, for example, below 5 ppm per mass in the outlet fluid stream.
[00067] At each stage of the separating apparatus 340, the separated liquid slag is directed from each of the cyclones 1 through the outlet tubes 4 that extend towards a reservoir 20. The separated liquid slag is then directed in a or pipe 14 extending from the reservoir 20 and the housing containing pressure 125 for removal and / or recovery of components therefrom. In obtaining the slag removal, the liquid slag can be directed through a section cooled by water 6 or, otherwise, through a section that has a high pressure cooled water connection, in which the interaction with the water makes with the liquid slag to solidify and / or granulate. The mixture of solidified slag and water can then be separated into a container (collection supply) 7 in a mixture of slag / water fluid that can be removed via a suitable valve 9 while any residual gas can be removed via a separate line 8.
[00068] Since the separator apparatus 340 is deployed in conjunction with the relatively high temperature outlet fluid stream (i.e., at a temperature sufficient to maintain the non-combustible elements in liquid form with a relatively low viscosity), it can be it is desirable, in some cases, that the surfaces of the separating apparatus 340 exposed to one of the combustion products / fluid outlet stream and the liquefied non-combustible elements associated therewith are comprised of a material configured to have at least one among a high temperature resistance , high resistance to corrosion and low thermal conductivity. Examples of such materials may include zirconium oxide and aluminum oxide although such examples are not intended to be limiting in any way. Thus, in certain aspects, the separator apparatus 340 is configured to substantially remove the liquefied non-combustible elements from the combustion products / outlet fluid stream and to maintain the non-combustible elements in a low-viscosity liquid form at least until they are removed from the reservoir. 20.
[00069] Thus, as revealed in this document, the slag separation in cases of a solid carbonaceous fuel can be obtained in a single unit (separator device 340) that can, in some cases, be readily extracted from the system for maintenance and inspection . However, such an aspect can additionally provide advantages as shown in Figure 6, whereby the system can be readily configured to implement a "flex fuel" approach in operation in relation to the availability of a particular fuel source. For example, the single unit of the separator apparatus 340 can be installed in the system between the combustion apparatus 220 and the transformation apparatus (turbine) 500, when the combustion apparatus 220 used a solid carbonaceous fuel as the fuel source. When it is desirable to switch to a source of liquid or carbonaceous gaseous fuel, the separator unit 340 can be removed from the system (i.e., it may not be necessary as previously discussed) in such a way that the outlet fluid stream from the combustion apparatus 220 can be removed. be directed directly to the transformation apparatus 500. The system can therefore also be ready to change to deploy the separator unit 340 if the availability of subsequent fuel imposes a source of solid carbonaceous fuel.
[00070] Many modifications and other aspects of the disclosure presented in this document will come to the mind of a person skilled in the art to which this disclosure forms part that has the benefit of the teachings presented in the previous descriptions and accompanying drawings. For example, in some aspects, only a portion of the total flow of the sweating substance / fluid 210 to and through the internal sweat member 332 and in the combustion chamber 222 may be required to provide the helical flow of the sweating fluid within the chamber combustion 222. In one case, for example, up to about 90% of the total mass of the transpiration fluid flow 210 entering the combustion chamber 222 can be implanted to supply or induce helical flow while maintaining sufficient radial fluid flow sweat 210 in the combustion chamber 222 to prevent solid or liquid particles or contaminants from colliding with the walls of the internal transpiration member 332 that define the combustion chamber 222.
[00071] Additionally, in some aspects, the combustion apparatus 220 can be configured and arranged as a partial oxidation device, for example, by using solid fuel slurry (i.e., coal). In such circumstances, the partial oxidation combustion apparatus 220 can be configured to have an operating temperature of, for example, up to about 1,600 ° C or, in other cases, in the range of about 1,400 ° C to about 1,500 ° C, where the burning of carbon in the fuel must be below about 2% and, preferably, below 1%. In these cases, the relatively lower operating temperature facilitates the production of H2 and CO by minimizing its combustion while facilitating a relatively high carbon conversion rate and usable heat.
[00072] In other respects, the combustion apparatus 220 can be configured to operate at a relatively high outlet temperature of about 5,000 ° C or more which can be associated, for example, with an adiabatic flame temperature or other sufficient temperature to facilitate dissociation of gases from gases. For example, CO2 significantly disassociates above about 1,600 ° C.
[00073] In still other aspects, the burner device 300 can be configured and arranged in such a way that there is no premixing of the carbonaceous fuel and the diffuser CO2 component upstream of it. Otherwise, O2 can also be introduced into the burner tip, for example, through a separate set of nozzles or with a concentric annular ring that surrounds the injection nozzle (s). In such circumstances, a diffusion flame can be obtained for carbonaceous fuels with a high H2 content. To obtain very high temperatures in the burner device 300, preheating of the fuel, oxygen, and / or any thinners may also be necessary.
[00074] Therefore, it should be understood that the disclosure should not be limited to the specific aspects disclosed and that modifications and other aspects are intended to be included in the scope of the attached claims. Although specific terms are used in this document, they are used only in a descriptive and generic sense and not for the purpose of limitation.

权利要求:
Claims (12)
[0001]
1. Apparatus for burning a fuel at high pressure and high temperature (220) characterized by comprising: a mixing arrangement (250) configured to mix one among a solid carbonaceous fuel, a liquid carbonaceous fuel and a carbonaceous gas with enriched oxygen and a working fluid to form a fuel mixture, the oxygen enriched being oxygen having a molar purity greater than about 85% and the working fluid comprising carbon dioxide and / or water; and a combustion arrangement (220) defining a combustion chamber (222) that has an inlet portion (222A) longitudinally spaced from an opposite outlet portion (222B), the inlet portion (222A) being configured to receiving the fuel mixture for combustion inside the combustion chamber (222) at a pressure between about 4 Mpa (40 bar) to about 50 Mpa (500 bar) and at a combustion temperature to form a combustion product , in which the combustion chamber (222) is further configured to direct the combustion product longitudinally towards the outlet portion (222B), the combustion arrangement (220) comprising: a pressure containment member (338) ; a porous perimetric transpiration member (230) which at least partially defines the combustion chamber (222) and which is at least partially surrounded by the pressure retaining member (338), in which the porous transpiration member (230) is configured to direct a transpiration substance (210) through it to flow in the combustion chamber (222), substantially uniform around its perimeter and longitudinally entering the inlet portion (222A) and the outlet portion (222B), of so that the transpiration substance is directed to flow substantially tangentially to the perimeter of the porous transpiration member (230) and helically over it, to buffer the interaction between the combustion product and the porous transpiration member (230), the substance sweating system comprising carbon dioxide and / or water; and a burner device (300) configured to receive the fuel mixture from the mixing arrangement (250) and to direct a substantially uniform linear flow of the fuel mixture into the inlet portion (222A) of the combustion chamber (222), in which the helical flow of the sweating substance is configured to induce a swirl of the fuel mixture within the combustion chamber (222), and in which the porous sweating member (230) is configured so that the helical flow of the transpiration substance is alternately reversed over at least one section thereof, so as to alternately reverse the induced eddy of one of the fuel mixture and the combustion product between the inlet portion (222A) and the outlet portion (222B).
[0002]
2. Apparatus according to claim 1, characterized by the fact that the mixing arrangement (250) is additionally configured to mix the carbonaceous fuel, which comprises a particulate solid carbonaceous fuel, with a fluidizing substance (255) which comprises a between water and liquid CO2 to form a liquid paste.
[0003]
3. Apparatus according to claim 1 or 2, characterized by the fact that the burner device (300) is configured to induce the fuel mixture to swirl by exiting the fuel mixture into the combustion chamber (222).
[0004]
Apparatus according to any one of claims 1 to 3, characterized in that the porous sweating member (230) is configured to direct the sweating substance through it in such a way that the sweating substance received in the chamber combustion (222) forms an outlet mixture with the combustion product to regulate a temperature around the outlet portion (222B) of the combustion chamber (222), in particular, where the porous sweat member is configured to direct carbon dioxide through it as the transpiration substance and to form a buffering layer with the transpiration substance immediately adjacent to the porous transpiration member (230) within the combustion chamber (222) to buffer interaction between the transpiration member ( 230) porous and liquefied incombustible contaminants and heat associated with the combustion product.
[0005]
Apparatus according to any one of claims 1 to 4, characterized by the fact that the porous sweating member (230) is configured to impart a Coanda effect to the sweating substance directed through it and into the combustion (222) in order to direct the transpiration substance to flow substantially tangentially to the perimeter of the porous transpiration member (222), in particular, in which the combustion chamber (222) includes a combustion section arranged towards the inlet portion (244A) and an afterburner section (244B) arranged towards the outlet portion (222B) and in which the porous transpiration member (230) is configured in such a way that the helical flow of the transpiration substance through the post-combustion section is opposed to the helical flow of the transpiration substance through the combustion section to reverse the induced eddy of the combustion product in the post-combustion section in relation to the network mill-induced fuel mixture in the combustion section.
[0006]
Apparatus according to any one of claims 1 to 5, characterized in that the porous transpiration member (230) additionally includes at least one transpiration port (246) extending through it, the at least one being at least one transpiration port is configured to direct an additional linear flow of the transpiration substance into one of the fuel mixture and the combustion product in order to affect its flow characteristics.
[0007]
Apparatus according to any one of claims 1 to 6, characterized in that it further comprises a heat removal device (350) associated with the pressure containment member (338) and configured to control its temperature, the heat removal device (350) comprises a heat transfer jacket that has a liquid circulated therein.
[0008]
Apparatus according to any one of claims 1 to 7, characterized in that the porous transpiration member (230) is additionally configured to define pores (335), the porous transpiration member (230) additionally having a cumulative pore area substantially equal to a surface area of the porous transpiration member (230) that defines the pores (355), optionally with the pores (355) spaced apart and substantially evenly distributed around the transpiration member ( 230) porous and between the inlet (222A) and outlet (222B) portions thereof.
[0009]
Apparatus according to any one of claims 1 to 8, characterized in that it additionally comprises a transformation apparatus (500) configured to receive the combustion product from the combustion chamber (222), the transformation apparatus ( 500) is responsive to the combustion product to transform the energy associated with it into kinetic energy, in particular, where the carbonaceous fuel is a solid and the system additionally comprises a separator device (340) disposed between the combustion arrangement (220 ) and the transformation apparatus (500), the separator apparatus (340) being configured to substantially remove liquefied incombustible contaminants from the combustion product received through it before the combustion product is directed to the transformation apparatus (500), in particular, in which the transpiration substance is configured to be introduced into the combustion chamber via the porous transpiration member , which is configured to direct the transpiration substance to the combustion chamber (222) in order to form a mixture with the combustion product entering the separator apparatus (340) to regulate the mixture at a temperature above a temperature of liquefaction of incombustible contaminants, in particular, further comprising a transpiration substance delivery device (475) subsequently disposed to the separator apparatus (340) and configured to deliver the transpiration substance to the combustion product that has the liquefied incombustible contaminants substantially removed thereof in order to regulate a temperature of the mixture of the transpiration substance and the combustion product entering the transformation apparatus (500), in particular, wherein the separator apparatus (340) additionally comprises a plurality of centrifugal separator devices (100) arranged in series, with each centrifugal separator device having a plurality of centrifugal separator elements (1) operably arranged in parallel, and in which the liquefied incombustible contaminants removed from the combustion product by the separator apparatus (340) are removably collected in a reservoir (20) associated with the apparatus separator (340), in particular, in which the transformation apparatus (500) comprises one of a turbine device configured to be responsive to the combustion product in order to transform the associated energy into kinetic energy and a generator device configured to turn kinetic energy into electricity.
[0010]
Apparatus according to any one of claims 1 to 9, characterized in that the porous transpiration member (230) is configured to direct the transpiration fluid into the combustion chamber (222) at a substantially angle straight in relation to it.
[0011]
Apparatus according to any one of claims 1 to 10, characterized in that the mixing arrangement (250) is configured to receive the transpiration substance also directed through the porous transpiration member (230), such as the fluid of work directed in the combustion chamber (222) and that forms the fuel mixture with the carbonaceous fuel and the enriched oxygen.
[0012]
Apparatus according to any one of claims 1 to 11, characterized in that it additionally comprises at least one source of transpiration substance configured to supply the transpiration substance to at least one of the mixing arrangement (250) as the work and the sweating member (230) as the sweating substance.

类似技术:

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公开号 | 公开日 | 专利标题

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BR112013004960B1|2020-12-01|apparatus for burning fuel at high pressure and high temperature

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ES2733083T3|2019-11-27|Apparatus and method for burning a fuel at high pressure and high temperature, and associated system and device

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US9068743B2|2015-06-30|Apparatus for combusting a fuel at high pressure and high temperature, and associated system

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KR20180100447A|2018-09-10|System and method for high efficiency power generation using a carbon dioxide circulating working fluid

同族专利:

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公开号 | 公开日

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JP2013536917A|2013-09-26|

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CN103201562A|2013-07-10|

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US20120073261A1|2012-03-29|

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MX2013002317A|2013-07-29|

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CA2809820A1|2012-03-08|

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EA201792016A2|2018-01-31|

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PL2612075T3|2020-01-31|

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AU2011296148B2|2015-07-09|

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US8986002B2|2015-03-24|

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WO2012030820A3|2013-04-04|

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EA201300308A1|2013-09-30|

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BR112013004960A2|2016-08-16|

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MX346964B|2017-04-07|

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TW201730479A|2017-09-01|

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JP5923505B2|2016-05-24|

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KR102007264B1|2019-08-05|

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CA2809820C|2019-01-15|

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ES2745132T3|2020-02-27|

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EP2612075B1|2019-06-12|

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EA029299B1|2018-03-30|

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KR101906330B1|2018-10-10|

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ZA201301520B|2015-09-30|

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WO2012030820A2|2012-03-08|

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EA034410B1|2020-02-05|

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US20150198331A1|2015-07-16|

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KR20180112874A|2018-10-12|

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TWI588413B|2017-06-21|

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TWI680258B|2019-12-21|

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EA201792016A3|2018-04-30|

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EP2612075A2|2013-07-10|

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KR20130099078A|2013-09-05|

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AU2011296148A1|2013-04-18|

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CN103201562B|2016-02-10|

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TW201217708A|2012-05-01|

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法律状态:
2018-12-26| B06F| Objections, documents and/or translations needed after an examination request according art. 34 industrial property law|

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2019-11-19| B06U| Preliminary requirement: requests with searches performed by other patent offices: suspension of the patent application procedure|

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2020-09-01| B09A| Decision: intention to grant|

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2020-12-01| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 30/08/2011, OBSERVADAS AS CONDICOES LEGAIS. |

优先权:

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申请号 | 申请日 | 专利标题

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US12/872,364|US9068743B2|2009-02-26|2010-08-31|Apparatus for combusting a fuel at high pressure and high temperature, and associated system|

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PCT/US2011/049727|WO2012030820A2|2010-08-31|2011-08-30|Apparatus for combusting a fuel at high pressure and high temperature, and associated system|

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