• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:

    公开号:SU932999A3
    申请号:SU792804599
    申请日:1979-08-17
    公开日:1982-05-30
    发明作者:Бухнер Хайнрих
    申请人:Клекнер-Хумбольдт-Дойтц Аг (Фирма)；
    IPC主号:
    专利说明:

    It is made from the injector to the calcining chamber, the gas collector, the layer of the corresponding calcined material, the exhaust gas collector, the bypass channel and back to the injector. Fuel is injected into the firing chamber and cold air from the cooling zone is introduced as combustion air. As a result of the intensive circulation of the gas, a very uniform fire is formed over the entire cross section and ahts 21. However, in striving to more and more furnace nodes, it turned out that when an injector was installed to maintain the circulation of gas, in each firing zone particular, consist in large constructions. On the other hand, with the help of these injectors in the burning zone, only insufficient pressure drops of about 78 mm water can be created in large furnaces, so that in large furnaces for the circulation of hot gas kinetic energy is no longer can be created using injectors. Therefore, the capacity of these furnaces is no more than 126 tato. The purpose of the invention is to reduce energy consumption and increase efficiency. This goal is achieved by the fact that in a furnace for heat treatment of a material, mainly limestone, dolomite or magnesite, containing a mine with a preheating zone, a roasting zone with a gas supply and a gas outlet, and the mine is made with holes in it, and cooling device with combustion chamber, gas supply device for creating circulation of hot gas and gas duct for removal of exhaust gases, gas supply device is designed as a cooled blower and installed outside echi mine vent between boiling chamber and combustion, the latter is connected with gas inlet pipe boiling chamber, a gas outlet and a gas inlet connected conductive camera conductive us interconnected through openings in the shaft walls ke. In addition, it is advisable to provide the furnace with a cooling system in the form of a closed circulation circuit with a cooler, to which the blower is connected, and the cooler is designed as a honeycomb or tubular heat exchanger. The presence of an optimally controlled gas transfer device directly in the hot gas cycle creates, without difficulty in the burning zone, a pressure drop of about 300 mm Hg, so that much larger quantities of gas per unit of time can be supplied to the material to be calcined (sinter). A cooled blower can easily transfer hot gas with a temperature of about 1200 in a cycle between the gas extraction device and the firing device. Expensive constructions for the installation of injectors at the mine can be excluded, so that the total capital investment for the furnace can be reduced. By installing a cooled blower in the hot circulation channel between the gas outlet chamber and the firing chamber, a particularly compact furnace design is achieved. The connection of the blower with the cooler entering the cooling system in the form of a closed circulation loop offers the advantage that the highly efficient coolant is supplied to the blower in a closed circuit, so that an exact temperature setting on the blower and the details of the blower cannot be achieved. undesirable high temperatures. On the other hand, volatile and sticky particles in hot gases crystallize directly. In the relatively cold parts, the blowers are again fed into the bulk mass as solid constituents. The sticking of the blower does not occur even with a very high content of harmful volatile components in hot gases. In this way, the safety and reliability of the blower and, thereby, of the entire furnace is achieved. The cooling system cooler serves as a heat exchanger for combustible materials supplied to the calcining chamber. As a consequence, optimal use of the heat removed by the blower and, in particular, in the oil-heated firing chambers is achieved, since the fuel is heated, more rapid evaporation is achieved in the firing chamber and thereby burning without ignition lag. FIG. Figure 1 shows a flow furnace for technical processing of a material with a partial cut with a cooled blower inserted into the hot gas circuit of the burning zone; in fig. 2 - cooled blower longitudinal section. Furnace 1 contains a shaft 2 with a heating zone V, two lower burning zones B and B and a cooling zone N, Square Mine 2 has gas collecting chambers 3 located on both sides of the shaft, of which gas collecting chamber 3 is a feeding basin and the gaseous chamber represents the gas discharge chamber. Between these two chambers, the wall 6 of the shaft 6, which is made with through-tops from 5 for gas, passes. Inside the shaft, the calcining material 7 is moved from top to bottom in the form of a dense column of calcining material. The gas supply chamber 3 is connected to the firing chamber 8, into which the burner 9 enters. The flue gas chamber k in the upper part has an outlet screw 10 to which the bypass channel 11 is connected, which on one side enters the firing chamber 8. In the bypass channel 11, a transport blower 12 provided with a coolant is placed to maintain a closed circuit of hot gas in the burning zone Bj. In the particular case, a branch from the fresh air pipeline 1 can be connected to the return duct 11, through which hot air from the cooling zone K is fed into the firing chamber 8 as combustion air. The firing chamber 8, the burner 9 and the transport blower 12 placed in the bypass channel 11 are located outside the mine. The transport blower 12 is connected to a cooling device 14 located outside the shaft by means of a closed cooling system guide system. The coolant is supplied to the hot air blower 12 through the pipeline .15 and the return to the air cooler 1b is carried out via the pipeline 17. The pipes 15 and 17 contain the measuring and adjustment devices necessary for controlling the circulation of the cooling medium, namely: each inlet pipe 15 and return pipe 17 through pressure relay 18 and high-speed thermal valve 19. Then pipe 15 and 17 have a flow rate meter 20 for coolant, which rye are designed as diaphragm measuring device with a differential pressure meter mano. In order to quickly turn off the coolant supply, a pneumatic valve 21 is placed in the pipe 15. A equalizing tank 22 is placed in the coolant discharge pipe 17 at the highest point of the circulation circuit to level the change in the volume of coolant and a filling and watering equipment is placed in front of the coolant pump 23 coolant tank 2. The honeycomb or tubular cooler 1b is air cooled and equipped with an adjustable cooling fan 25. The constructive implementation of the cooler in the form of a tubular or cellular heat exchanger is particularly advantageous when heating of the fuel is not required, as, for example, with coal-dust. Cooling of the coolant in this case occurs preferably in the right direction and with the aid of an air-blown cooler. The cooled blower 12 comprises shaft 26 and wheels 27. Both shaft 26 and wheel 27 are hollow. A hollow cylinder 28 is coaxially arranged in the hollow shaft 2b of the blower at a distance from the hollow shaft. The hollow cylinder is connected through a fixed distribution head 29 to the fixed pipes 15 and 17 FOR coolant, which in turn, with the cooler 16, form a closed cooling circuit facilities. The distributor head is surrounded by a sealing cover. In the hollow wheel 27 of the blower 27, which is also made at the outer end of each blade 30, the wheels are arranged in the form of a ribbon of a meander, guides 31 of sheet metal, to which from the annular space 32. between the hollow shaft 2b and the hollow cylinder 28, coolant is supplied through a conduit 33 in the blower wheel. Due to this, the blower wheels, where high temperatures are to be expected, achieve optimum heat removal through an increased supply of coolant. The inner space of the fan wheel 27 of the blower 27 is connected to the hollow cylinder 28 through the connecting channel 3 which is located in the hub 35 of the wheel 27 of the blower. At the lower end there is a device for the continuous removal of burnt material and nozzles 36 for cold air entering the cooling zone. The annular space 32 through which the coolant is supplied, and the hollow cylinder 28 through which the coolant is withdrawn, in combination with the fixed distribution head 29, provide the optimum direction of the coolant with minimum 1 hydraulic resistance. By placing the coolant guide devices of the cooling piping in the hollow shaft and the wheel of the blower, optimal circulation of the coolant is achieved, in particular, at the thermally loaded parts of the blower. The furnace for heat treatment of the material works as follows. The hot gases formed in the firing chamber 8 flow from the firing chamber into the gas collecting chamber 3 and through the gas holes 5 in the shaft wall 6 across the direction of movement of the calcined material into a densely poured layer of calcined material, go to another to the side of the poured material through the gas holes 5 into the exhaust chamber t and there they are collected. From the gas collection chamber, hot gas through the bypass holes 10 is sucked into the discharge channel 11 by means of transport Blower 12, which for this purpose is located directly in a stream of hot ha with a temperature of 800-1200. The transport blower 12 delivers hot gas into the firing chamber 8, into which combustible substances are introduced through the heating pad 9, which are burned there in an atmosphere enriched with oxygen of heated fresh air. Thus, kinetic energy is supplied to the hot gas circuit in each burning zone, necessary for repeated circulation of hot gases in the burning zone, while the blower in each of the burning zones makes it possible to set an exact differential pressure of at least 350 mm Hg . This creates an intense gas circulation with a large transmission volume, so that the amount of heat necessary for optimal calcination can always be supplied so that the flares can be burned to the material being located in the burning zone, even with a large throughput of the material to be burned. To prevent the gases of mine 2 from going upwards in the vertical direction, a sealing zone is placed between each calcining zone B and B. 2. This prevents the passage of hot gas into the overlying calcining zone or heating zone. Falling from the burning zone to the cooling zone K, the burning material in it is cooled by means of cold air entering through the BZ nozzles to the appropriate temperature of further processing and is discharged. The cold air heated in the cooling zone transfers the heat obtained from the material to be burned in the calcining chamber 8 as combustion air. A portion of the hot gases formed in the calcining zones 8 / and B are removed from the calcination zones and fed through channels not shown in detail in the kiln 1 to the starting material in the preheat zone to heat it. Transport blower 12 through the distribution head 29 is connected to a cooling device I, which is made as described above. The cooling of the blower is carried out with a cooling agent, preferably a heat-resistant organic or inorganic liquid, which has a lower boiling point and circulates in a closed circuit. Due to this measure, a relatively high heat dissipation is achieved at a relatively low fluid temperature and thus improved cooling of individual parts of the blower, due to which, in particular, temperature peaks can be removed on the details of the blower. In addition, the cross sections of coolant pipelines can be chosen so small that even in difficult parts of the blower, cooling fluid channels can be laid. Due to the coolant circuit, expensive high-performance coolants can be used, since the coolant should not be continuously replenished.
    The coolant may be heat resistant heat transfer oil, in particular silicone oil, whereby the advantage is achieved that with a coolant of a conventional commercial type the desired operating temperature of 100 C is reached. It is advisable that the coolant operating temperature be set to 200 and preferably between 200 and 220 ° C, for which, in fixed pipelines of the cooling device 1, appropriate control devices are installed, such as a pressure relay 18, a thermo-vent 19 and a rhythm 20 flow rate.
    Due to this, there is an immediate reliable cooling cycle control system that immediately indicates an increase in temperature and / or interference in the passage of coolant so that immediate countermeasures can be taken immediately. This ensures that all the blower parts that are in the compressed gas flow (approximately 8001200) of the bypass channel 11 are so cooled that their temperature is guaranteed to be below the maximum thermal loads of the material used. On the other hand, by means of the parts that are maximally heated in hot gas, the blowers volatile from burning material harmful, alkaline or sulfur compounds, which are prone to sticking, suddenly cool down and crystallize from combustible gases so that blowers or blowers on the blades cannot form, and the precipitators can not form on the blower or on the blades of the blower. negative effects on the blower characteristics or excessive load on the bearings of the blower. Due to the use of cooled with heat-transfer oil in a closed
    The circulation of the blower directly in the circulation circuit of the hot gas in the burning zone of the shaft furnace heated by the through flow, firstly, it is possible to create a high pressure drop in each burning zone and thereby create a constantly high kinetic energy for the circulation of the hot gas, second, shaft furnaces with double throughput are possible in comparison with the through-flow shaft furnaces equipped so far with injectors.
    权利要求:
    Claims (3)
    [1]
    1. Furnace for heat treatment of lumpy or fine-grained material, predominantly lime, dolomite or magnesite, containing a mine with a preheating zone, a burning zone with gas supply and exhaust chambers, with the mine
    It has openings and a cooling zone, a burner with a combustion chamber, a gas supply device for creating hot gas circulation and a gas flue for exhaust gas, which, in order to reduce energy consumption and increase efficiency, the gas supply device made in the form of a cooled blower and installed outside the furnace at the shaft between the gas outlet chamber and the combustion chamber, the latter being connected to the gas supply pipe by a pipeline. the chamber, and the gas outlet and gas supply chambers are interconnected through openings in the wall of the shaft.
    [2]
    2. Furnace according to claim 1, different from the fact that it is equipped with a cooling system in the form of a closed circulation circuit with a cooler, to which the blower is connected.
    [3]
    3. The furnace according to claim 1, which differs from that the cooler is made in the form of a honeycomb or tubular heat exchanger.
    Sources of information taken into account in the examination
    1. Patent of Germany No.
    cl. 31 a 1 1/08, published 19b5.
    2. The patent of Germany No. 1588057, cl. 42 D 1/15, published. 1972.
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    同族专利:
    公开号 | 公开日
    DE2960351D1|1981-08-20|
    EP0008667A1|1980-03-19|
    AT67T|1981-05-15|
    US4252521A|1981-02-24|
    JPS5531298A|1980-03-05|
    EP0008667B1|1981-05-13|
    DE2836162A1|1980-02-28|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US1653217A|1927-12-20|Combustion turbine |
    US1713237A|1928-01-11|1929-05-14|Pacific Abrasive Supply Compan|Drier|
    US2345067A|1939-08-17|1944-03-28|Osann Bernhard|Method of and apparatus for operating shaft furnaces for roasting and the like|
    US2369795A|1941-11-17|1945-02-20|Andre P E Planiol|Gaseous fluid turbine or the like|
    US2393963A|1944-09-22|1946-02-05|Adolph L Berger|Turbine wheel|
    US2455313A|1945-02-19|1948-11-30|Irving B Osofsky|Heat exchanging airplane propeller|
    US2778601A|1951-05-28|1957-01-22|Ernst R G Eckert|Fluid cooled turbine blade construction|
    US2883151A|1954-01-26|1959-04-21|Curtiss Wright Corp|Turbine cooling system|
    US2948521A|1956-07-14|1960-08-09|Roechlingsche Eisen & Stahl|Process and apparatus for heating a cross stream shaft furnace in view of heating solid materials, particularly for the calcination of limestone|
    DE1034090B|1956-07-14|1958-07-10|Roechlingsche Eisen & Stahl|Cross-flow heated shaft furnace for heating bulk material, especially for burning limestone|
    US2952441A|1956-12-10|1960-09-13|Int Harvester Co|Cooling construction for gas turbine blades|
    DE1241041B|1961-12-27|1967-05-24|Kloeckner Humboldt Deutz Ag|Cross-flow furnace for burning lime, dolomite or the like.|
    DE1197798B|1963-10-12|1965-07-29|Sofim Saar Saarofenbau Fuer In|Process for burning limestone and device for carrying out the process|
    US3311344A|1964-12-08|1967-03-28|John V Yost|Turbine wheel|
    FR1440786A|1965-04-21|1966-06-03|Sofim Saar Saarofenbau Fuer In|Method for firing limestone and device for carrying out this process|
    GB1187251A|1967-09-08|1970-04-08|Gas Council|Improvements in or relating to Cooling Systems for Rotary Machines|
    US3544096A|1968-05-22|1970-12-01|Kloeckner Humboldt Deutz Ag|Cross-current blast furnace|
    US3936220A|1974-08-26|1976-02-03|Controls Southeast, Inc.|Jacket construction for fluid-circulating pumps|DE3209836C2|1982-03-18|1988-12-29|Dolomitwerke Gmbh, 5603 Wuelfrath, De|
    JPH0543227Y2|1987-12-21|1993-10-29|
    CN101745783B|2009-12-14|2011-07-20|成都天保重型装备股份有限公司|Manufacturing technology of furnace body of calcining furnace|
    CN102092968B|2011-01-07|2012-06-27|重庆京庆重型机械股份有限公司|Lime smoldering furnace|
    CN102627418B|2012-04-26|2013-08-21|石家庄新华能源环保科技股份有限公司|Compound lime kiln|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE19782836162|DE2836162A1|1978-08-18|1978-08-18|OVEN FOR HEAT TREATMENT FROM MOST PIECE TO FINE GRAIN|
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