• 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:
    feeding system for use in a sedimentation vessel and method for optimizing the concentration of the feed paste in a sedimentation vessel. a feeding system is used in the sedimentation vessel. the feeding system includes an inlet to receive a quantity of feed paste to a drain to deliver the feed paste to the separation zone within the sedimentation vessel. the feed paste includes a mixture of solids and liquids that are to be separated in the separation zone within the sedimentation vessel. a compressed air pump is used to cycle at least a portion of separated solids or separated liquids in the separation zone and return them to the supply system. this returned portion mixes with the feed paste and can work to dilute the feed paste to an ideal concentration for separation. in addition, food packaging chemicals can be mixed with the feed paste before or after mixing the feed paste with the returned portion of the separated products.
    公开号:BR112012010753B1
    申请号:R112012010753-4
    申请日:2010-09-20
    公开日:2020-09-24
    发明作者:Philip Lake；Mark Crozier；Jeffery H. Easton
    申请人:Westech Engineering, Inc.；Paste Thick Ventures Llc；
    IPC主号:
    专利说明:

    [0001] The current realization generally refers to sedimentation vessels used to separate solids and liquids. More specifically, the current realization concerns a new type of feed well (feedwell) or feeding system in the sedimentation vessel. Historic:
    [0002] Many commercial facilities use water or liquid for, or as part of, their process. Often the liquid contains several solids or particles. It is often necessary or desirable to separate solids from liquids. One type of structure used to separate solids from liquids is a sedimentation vessel.
    [0003] Sedimentation vessels are routinely used to separate solids and liquids in industry. Sometimes, the name “thickener” or “clarifier” is used to describe sedimentation vessels. In sedimentation vessels, liquids and solids are separated from each other by gravity as described by Stokes Law. Such sedimentation vessels are generally used in several different applications.
    [0004] Typically, solids and liquids are in the form of paste and are inserted into a sedimentation vessel through a feed well (sometimes known as a “feedwell”). In some situations, it is desirable to dilute or concentrate the paste. However, a better system, method and / or apparatus for diluting / concentrating the paste would be desirable. Brief summary of the invention:
    [0005] A feeding system for use in a sedimentation vessel is disclosed. The feed system includes an inlet to receive a quantity of feed paste and a drain to deliver the feed paste to a separation zone within the sedimentation vessel. The feed paste is composed of a mixture of solids and liquids, which are separated from each other in the separation zone. The feed system also includes an air transport pump that conveys at least a portion of the separated liquids or separated solids from the separation zone back to the feed system in such a way that the portion is mixed with the feed paste. In some embodiments, the portion returned by the air transport pump is liquid, while in other embodiments, the returned portion is solid. The returned portion dilutes or concentrates the feed paste to a concentration that is ideal for separation. In some embodiments, chemical food wrappers are mixed with the feed paste before mixing the feed paste with the portion. The portion is mixed with the feed paste in the middle of the inlet and outlet of the feed system. The amount of the portion mixed with the feed paste can be modified by adjusting the air transport pump.
    [0006] The supply system may include a supply well. Inside the feed pit there may be one or more deflectors. The feed slurry can enter the feed well in such a way that a rotation to the right or left is created inside the feed well. The deflector can only be a deflector with a deep width. In other embodiments, the feed system also includes a feed tube that enters the sedimentation vessel below the level of the spill / liquid. Other embodiments are built in which the feeding system includes a feeding tube that enters the sedimentation vessel from above. The supply system can also include an external well that has an inlet. Additional designs are designed in which the feed system includes a drop box feed tube.
    [0007] Current achievements also teach a method for optimizing the concentration of the slurry in the sedimentation vessel to separate solids from liquids. The method includes receiving a quantity of feedstock, where the feedstock includes a mixture of solids and liquids. The method also includes passing the feed paste through a feed system that includes an inlet to receive the feed paste and a drain to deliver the feed paste to a separation zone within the sedimentation vessel. The method includes separating the feed paste into solids and liquids within the separation and pumping zone, by means of an air transport pump, of at least a portion of the separated solids or separated liquids in the separation zone to the feed system such that the portion is mixed with the feed paste. In other embodiments, the method includes adding chemical food conditioners to the feed paste before, during or after mixing the feed paste with the portion.
    [0008] Current achievements relate to a positive method of optimizing the concentration of the feed material in the feed well, feed tube, feed chute and other feed systems, using a compressed air pump (s). One of the characteristics of these achievements is that a device for pumping compressed air delivers paste or clarified liquid to the feeding system in order to adjust the concentration of the feed stream and to improve the conditioning of the food and the execution of sedimentation.
    [0009] The current design may require a portion of overflowing clarified liquid (effluent) or slurry from inside the sedimentation vessel, or the vessel's effluent collection scheme and use of a compressed air pump (s) to deliver this portion of the liquid to one or more of the vessel-related feeding systems to provide adjustment of the concentration of the feed paste. Brief description of the drawings:
    [0010] The order in which the characteristics and advantages already mentioned and others are obtained will be easily understood, a more detailed description of the invention will be offered as a reference to specific realizations that are illustrated in the attached drawings. It should be understood that these drawings show only typical embodiments of the invention and therefore should not be considered as limiting the extent of the invention. The invention will be described and explained with specificity and additional detail using the attached drawings in which: Figure 1 is a partially cropped view, perspective of a sedimentation vessel. Figure 2A is a view of the upper plane of a realization of a food well according to the current realization that can be used in conjunction with the sedimentation vessel of Figure 1. Figure 2B is a cross-sectional view of the realization of Figure 2A. Figure 3A is a view of the upper plane of a realization of a food well according to the current realizations that can be used in conjunction with the sedimentation vessel of Figure 1. Figure 3B is a cross-sectional view of the realization of Figure 3A. Figure 4A is a cross-sectional view of a realization of a food well according to the current realizations that can be used in conjunction with the sedimentation vessel of Figure 1. Figure 4B is a cross-sectional view of the realization of Figure 4A. Figure 5 is a cross-sectional view of another embodiment of a sedimentation vessel including a feeding system. Figure 6 is a cross-sectional view of another embodiment of a sedimentation vessel including a feeding system. Figure 7 is a cross-sectional view of another embodiment of a sedimentation vessel including a feeding system. Figure 8 is a cross-sectional view of another embodiment of a sedimentation vessel including a feeding system. Figure 9 is a cross-sectional view of another embodiment of a sedimentation vessel including a feeding system. Detailed Description:
    [0011] The achievements of the current invention will be better understood by reference to the drawings, where similar parts have equal numbers. It will be readily understood that the components of the current invention, as described and illustrated in general in the Figures here, can be arranged and designed in a variety of different configurations. Thus, the following more detailed description of the realizations of the current invention, as represented in the Figures, is not intended to limit the scope of the invention, as claimed, but only representative of the realizations of the invention.
    [0012] Referring to Figure 1, a perspective view of a sedimentation vessel 10 is illustrated. The sedimentation vessel 10 can be known as a thickener or clarifier. It should be mentioned that the configuration of the sedimentation vessel 10 is provided for illustrative reasons. Those skilled in the art will appreciate that there are a variety of different configurations that can be used for the sedimentation vessel 10.
    [0013] As suggested by the name, the settling vessel 10 is designed to separate solid particles or materials from a liquid. Such a separation process occurs through the Stokes Law, where the solids sit at the bottom of the sedimentation vessel 10 while the clarified liquid is extracted from the top of the vessel 10. The sedimentation vessel 10 includes a separation chamber 14, which in the Figure 1 is illustrated as a cylindrical unit. Other configurations are possible. The volume inside the chamber 10 includes the separation zone 18, which is a zone where the separation by gravity of the solids and liquids occurs. When settling the solids at the bottom of the chamber 14, scrapers 22 can be used to scrape the solids from the bottom of the chamber 14 into a collection unit 26. Although the scrapers 22 are illustrated, scraper arms or other characteristics and / or methods ( including a steep cone without scrapers) to collect the solids deposited at the bottom of the chamber 14 can also be used.
    [0014] The liquid in chamber 14 will generally be collected near or on top of chamber 14. Specifically, a spillway 30 can be used in such a way that the liquid can overflow from the spillway 30 (which can be a triangular spillway) and be captured in a chute 34 Again, the exact way to collect the clarified liquid from chamber 14 may vary according to the specific embodiment. Other settings and / or collection methods can be used.
    [0015] In carrying out Figure 1, a walkway 40 can be placed above chamber 14 to allow repair, maintenance and / or access to the sedimentation vessel 10. One or more controls 44 can be added to the sedimentation vessel 10. Controls 44 can be used to control and / or track the rate of rise or "upward flow" speed of the feed slurry. The rate of rise (or upward flow speed) is the rate at which the liquid in the slurry, when entering chamber 14, flows up and out of chamber 14 via a spillway 30. If the upward flow rate is less than the settling speed (the speed at which the solids in the paste settle at the bottom of chamber 14) of the solids, the process it can be a continuous process. Controls 44 can also control and / or monitor the amount and / or concentration of feed paste 10 and / or other factors. Controls 44 can also be placed in such a way that the process inside chamber 14 don't be continuous . Other embodiments can be designed in which the process within the chamber 14 is a continuous process. In a continuous process the quantities entering the vessel 10 continuously and the quantities leaving the vessel 10 are essentially the same.
    [0016] Controls 44 can be designed to control and / or regulate the addition of other chemicals, which are designed as "food conditioning chemicals" 45. Such chemicals 45 can include flocculation chemicals, coagulation chemicals, conditioning chemicals, etc. These chemicals can be added to the feed stream to improve the process of separating solids and liquids, and the dilution of chemicals used for conditioning, coagulation and flocculation can provide better kinetic reactions, chemical efficiency and better solids settlement characteristics. can be added by means of an apparatus 48 (such as one or more supply lines or other similar characteristics). Food-conditioning chemicals 45 can mix in feed well 68, or be added upstream from the feed well, downstream from the food well or anywhere else (or multiple places), if desired. m or more instruments 50 can be used to track conditions within separation zone 18. For example, controls 44 may include one or more controls 44a that allow for changing the amount and / or rate of addition of food-conditioning chemicals. Controls may include one or more controls 44b that regulate and / or track the rate at which the paste is fed into the feed system. Such controls can control a pump (not shown) and / or a motor (not shown) that changes the amount and / or rate of paste that is fed into the feed system. (The speed or flow of the paste mass that is inserted can increase or decrease, if desired) Controls 44b can regulate and / or monitor the concentration (up or down) of the paste by diluting it with more liquid or concentrating it the one with more solids. Controls 44b can also control the inlet and outlet of the supply system. One or more controls 44c that control the operation and placement of the air transport pump (described below) can also be included. Thus, by adjusting the controls 44, the upward flow speed, the settlement speed and / or other separation variables can be changed, influenced and / or monitored.
    [0017] In the embodiment of Figure 1, the sedimentation vessel 10 includes a feeding system 60. The feeding system 60 can be designed to insert the mixture of solids and liquids into the separation zone 18. There are a variety of different types of feeding systems 60. Figure 1 shows a feed system 60 that includes a feed tube 64 that delivers the mixture of solid and liquid (or paste) to the feed well 68. One or more external wells 76 (or other collection / storage structure ) can be used as part of the feed system 60.
    [0018] The feed paste can be inserted into the feed system 60 via an inlet 54. Inlet 54 can be any structure capable of receiving a quantity of feed paste and / or insert the feed paste into the feed system 60. The inlet 54 can be placed in a feed tube 64, feed well 68 or other feed structure (such as an external well 76). In the realization of Figure 1, the inlet 54 is placed in an external well 76.
    [0019] The feed system 60 also includes a drain 56 that allows the amount of feed paste to exit the feed system 60 towards the sedimentation vessel 10. In the embodiment of Figure 1, the drain 56 can be an open bottom of a well 68. Other types of drains can be used. In addition to this, other embodiments can be constructed in which (optional) ports 72 and / or gates (not shown) in the food well allow the low density liquid from the outside of the food well to flow in. The inner slurry can generally be at a specific gravity greater than the liquid outside the feed well, and so the gradient density can work to force the lower density liquid through the ports, the air transport pump (as described below) ) used in this embodiment can be used to increase the density differential to increase the flow of liquid through the ports. Other methods have been employed using the speed of the feed stream to cause the addition of the outside liquid in an ejector "jet pump" arrangement. Other methods have included the use of mechanically driven pumping devices such as centrifugal flow pumps, radial or longitudinal.
    [0020] As already mentioned, a variety of different feeding systems are possible. For example, the feed system may include a food dispenser, feed tube and / or a feed chute. Such structures can be used instead of or in addition to the feed pit. All of these feeding systems can be used in sedimentation vessels including thickeners and clarifiers. Any structure capable of inserting the feed paste into the feed chamber 14 can be used. These devices accept a suspension of incoming feed stream or paste composed of liquids and solids (particles) and deliver this feed stream to the sedimentation vessel. These structures also dissipate the speed and impulse of the supply current. The insertion of the food in the separation zone as well as the concentration of the feeding well of the sedimentation vessel can be important in the execution of the process of the sedimentation apparatus. The feeding system can play an important role in the conditioning, coagulation and flocculation of particles and liquid chemistry in the feed stream. In some executions of the process, the chemical conditioning, coagulation and flocculation are improved by adjusting the food flow that enters an ideal concentration. As already mentioned, the dilution of the chemicals used for conditioning, coagulation and flocculation can provide improvements in the kinetic reaction, chemical efficiency and solid settlement characteristics.
    [0021] As explained in this document, the slurry 84 includes a mixture of solids and liquids. The purpose of the sedimentation vessel 10 is to separate this paste into individual parts, namely, to separate most solids and liquids. Therefore, most solids 80 will settle to the bottom of the separation zone 18 and the liquid that still has solids 806 will rise above the vessel 10. The separation process can be continuous when the rate of elevation or flow rate ascending 84 in vessel 10 is less than the settling speed of most solids 80 contained in feed slurry 84.
    [0022] Figures 2A and 2B represent the realization of a feeding system 260 according to the current realizations. Figure 2A is a plan view of a food well embodiment 260 that can be used in conjunction with the food well system 60 of Figure 1. Figure 2B is a cross-sectional view of the realization of Figure 2A (as shown in Figure 2A). shown in Figure 2A). In fact, the feed system 260 illustrated in Figure 2A can replace the feed system 60 in Figure 1. As can be seen in Figure 2A, the feed system 260 includes a feed well 268 which is provided by a feed tube 264. The feed system 150 may further include an air transport pump 270. Figure 2A is illustrated empty (for clarity) while Figure 2B is illustrated filled with paste being separated.
    [0023] One of the advantages of a 270 air transport pump is that this technology does not require any moving parts in the process of the wet section of the pump. Compressed air pumps are used considerably in water and wastewater treatment applications and achieve their pumping ability by injecting air through a diffuser towards the vessel with an open side or bottom. Many different air diffusers have been used successfully in pumping compressed air, with the small difference of air bubbles created with the potential to clog / not clog. For current achievements, all types of air transport pumps are considered and vary only by their pumping capacity and overall configuration. The air drawn from the diffuser mixes with the liquid contained in the pump chamber, lowering the apparent density of the material. The original liquid that now has a higher density outside the vessel distributes a pressure because of this gradient gravity and creates a positive flow, because of the pressure differential of the material contained in the adjacent vessel, the discharge can be at a level greater or less than the level of the surrounding vessels. Variable flow of air supplied to the device's diffuser manipulates the apparent density of the internal liquid allowing the creation of a variable discharge head as required to control the flow through the device
    [0024] The air transport pump described in this document is designed to be configured in different ways. Single or multiple pumps with single or multiple suction points. The depth and location of the compressed air pump (s) can be within the margins of the vessel well or connected to the effluent collection scheme outside the well. A positive way to control the flow of air to the air transport pump 270 can be used to provide control at the rate of flow pumped.
    [0025] As explained in this document, the current embodiment can use a portion 284 from within the sedimentation vessel 10 (or more specifically the separation zone 18) and use the compressed air pump (s) to deliver this portion of liquid to one or more of the vessel-related feeding systems to provide adjustment to the concentration of the feed paste. The portion 284 that is illustrated coming out of the pump 270 can be (1) clarified liquid that overflowed 86 (effluent) or (2) paste settling 284 (which is a mixture of solids and liquids) or even (3) paste concentrated in the smaller potion of the separation chamber 14 ("concentrated paste”). Of course, it is also possible to take the portion 284 of the effluent collection scheme of vessel 10 (as of the liquid that overflowed from the spillway 30 (illustrated in Figure 1) or the solids scraped by the arms 22 (illustrated in Figure 1), or some other portion of the collection scheme for vessel 10) The air transport pump 270 includes an inlet that is placed to collect portion 284 and allow it to be pumped by pump 270.
    [0026] The portion 284 can be inserted again into the feed well 260 between the inlet 54 (Figure 1) and the drain 56 (Figure 1). Inserting portion 284 into feed slurry 84 can have significant advantages. For example, portion 284 can function to dilute slurry 84. More specifically, the concentration of slurry 84 can be adjusted depending on the insertion of portion 284. This adjustment of concentration of slurry 84 can be adapted to provide better separation and / or ideal. Obviously, the exact concentration of the paste that is desired will depend on the specific realization (eg the components being separated, the flow rate, the mass flow, the amount and rate of paste is inserted, etc.). Professionals in this art will be able to adjust the conditions and variables related to the separation to provide ideal results. A control loop with density instruments (such as those found in controls 44 in Figure 1) can be used additionally to control the dilution / seeding flow rate caused by the insertion of portion 284. In addition, the seed transport pump air 270 and / or other controls 44 can be designed in such a way that the amount of portion 284 that is mixed with slurry 84 can be varied or adjusted if necessary. The addition of chemical conditioners 45 can also be used to adjust the separation characteristics, if necessary.
    [0027] In addition to providing dilution liquid to obtain a concentration in the ideal feed well, the air transport pump arrangement 270 can be configured to provide additional recirculation of seed solids 80 to increase concentration to an ideal level when moving solids 80 previously seated from the separation zone 18 in the sedimentation vessel 10 to a slurry 84. Thus, in some embodiments, the portion 284 inserted back into the slurry 84 can be clarified liquid (separated) while in other embodiments, the portion 284 reinserted may be some of the 80 settled solids.
    [0028] The volume of liquids and solids pumped back into the feed system will depend primarily on the original pulp concentration and flow rate. The concentration of food 84 can vary from a very low concentration of 500ppm to a very high concentration of 45% solids by weight. The concentration of the portion being pumped into the feeding system will depend on the need for sowing or dilution. In the event that sowing is required, the concentration of the paste will be between 1% -30% solids by weight. When dilution is required the reach of the portion concentration will begin at food concentration 84 to clean liquor that does not contain solids. The flow rate of portion 284 being pumped into the feed system may vary as the feed parameters of the feed flow rate and concentration vary. The flow rate of portion 284 varies by changing the air flow rate to the air pump which varies the density in the air pump chamber or by changing the elevation of the air pump outlet to influence the pressure difference leading to flow rate.
    [0029] In carrying out Figures 2A and 2B, the feed system 260 (and more specifically the feed well 268) can include a chute 274. The air transport pump 270 includes a pump chamber 278 that has an inlet 282a that can be open suction end 282. Air is pumped through a diffuser 280 to chamber 278. Because the pump chamber 278 has an open end, the paste (composed of solids and liquids) also enters chamber 278. The air entrained by the diffuser mixes with the material contained in the pump chamber 278 reducing the apparent density of the material. The original liquid now with higher density outside the pump chamber 278 distributes a pressure differential because of this density gradient and "pumps" the contained material (dilution / seeding liquid) from the surrounding vessel. (This material is the 284 portion that is inserted back into slurry 84. The material pumped into the channel 274. Thus, the level 284 (height) of the material in the channel 274 (Ex. after passing through the air transport pump 270) is higher than the original level 286. The material in the chute 274 can then drain back into the feed well and then pass into the separation zone 18 for separation.The level of the material in the separation zone 18 is illustrated by the number 288. The chute 274, which is also known as the food dilution chute, can be used to provide adequate dwell time for the dilution flow to loosen entrained air bubbles in the dilution liquid before being inserted with the food into the feed well 260. Other structures capable of lengthening the residence time (like other type of vase with open surface) can be used. The delivery of the air transport pump is not necessarily at a height higher than that of the surface of the food well 288, the delivery point can be below the water surface 288. The advantage of a delivery point below is that the flow resistance is reduced and thus allows a higher dilution / seeding flow rate (pump efficiency).
    [0030] Figures 3A and 3B represent another embodiment of a 360 feed system for use with a sedimentation vessel 10. Figure 3A is a plan view of the realization of a 360 feed well that can be used in conjunction with the well system. supply 60 of Figure 1. Figure 3B is a cross-sectional view of the realization of Figure 3A (as shown in Figure 3A). Figure 3A is empty (for clarity) while Figure 3B is illustrated full of the paste being separated. This feed system 360 is a feed well 368 that is provided by a feed tube 264. Again, this feed well 368 can be used instead of feed well 68 illustrated in Figure 1. Feed well 368 is also similar to feed well 268 mentioned previously. The feed well 368 is different from what has been described above because it does not include a chute 274. (the other components of the pump may be similar to what has been described before). The interior 380 of the feed well 368 includes one or more baffles 382 for mixing the feed paste in the separation zone 18. The baffles 382 can be angled or flattened, or even have some other configuration. The baffles 382 shown in Figures 3A and 3B are angled baffles. The purpose of deflectors 382 within feed well 368 is to assist in dissipating energy and mixing dilution liquid and feed paste into feed well 368.
    [0031] It should be mentioned that some achievements can be constructed in which there is a "right hand" inlet of food in feed pit 368. This right hand inlet causes a rotation to the left when viewed from above (as illustrated by arrow 388). specific left rotation provides an upward angular thrust of the feed slurry within the feed well which increases the holding efficiency of the feed slurry and facilitates the mixing of the dilution liquid with the slurry entering a mixing zone within the feed Additional chemical injection points can be placed within this mixing zone of dilution liquid and incoming food. More achievements can be designed in which the entry of food into the food well creates a rotation to the left (when viewed) Even more achievements can be designed in which the paste mixes in the chamber without creating a defined rotation in any direction.
    [0032] The operation of the 360 well is similar to what has been described above. A portion 284 (not seen in Figures 3A and 3B) will be taken from the separation zone (or other portions of vessel 10) and reinserted to feed paste 84. Portion 284 mixes with feed paste 84 thus adjusting the concentration of the feed paste 84. In some embodiments, food conditioning chemicals 45 (not seen in Figure 1) can be inserted and mixed with feed paste 84 at the same time as portion 284 is mixed. In other embodiments, the food conditioning chemicals 45 are mixed with the slurry 84 before portion 284 is added to slurry 84.
    [0033] Figures 4A and 4B represent another type of feeding system 460 for use with the sedimentation vessel. Figure 4A is a plan view of the realization of a food well 460 that can be used in conjunction with the food well system 60 of Figure 1. Figure 4B is a cross-sectional view of the realization of Figure 4A (as indicated in Figure 4A). Figure 4A is illustrated empty (for the sake of clarity) while Figure 4B is illustrated full of paste being separated. The feed system 460 includes a feed well 468 that can be used as part of the sedimentation vessel 10 in Figure 1. Feed well 468 is similar to the embodiment described above as feed well 368. Feed well 468 can be used in conjunction with the 270 air transport pump which is similar to what has already been described above. However, the feed well 468 of Figure 4A and 4B includes one or more blown deflectors 482 added to the interior 480 of the feed well 468. One reason for having one or more blown deflectors 482 inside the food well is to aid in energy dispersion and mixing the dilution liquid and feed paste into the feed well.
    [0034] A single flared deflector 482 is seen in Figures 4A and 4B. As can be seen in these Figures, the deflector width 481 is set. This means that the width 481 of the baffle 482 reduces around the circumference of the round feed well 468. The deflected deflector 482 can extend completely around the interior 480 of the feed pit 468 or not. As seen in Figure 4A, the baffle 468 ends before extending completely around (Ex. 360 °) the interior 480 of the feed well 468. As seen in Figure 4A, the deflected baffle 482 can help to create a left rotation (when viewed from above) in the feed pit 468 (as illustrated by arrow 388). This specific left rotation produces an upward angular impulse of the feed slurry within the feed well which increases the holding efficiency of the feed slurry and facilitates the mixing of the dilution liquid with the slurry entering a mixing zone within the feed well. Other achievements can be designed to produce a rotation to the right (when viewed from above)
    [0035] The operation of the feed well 460 is similar to what has already been described above. A portion 284 (not seen in Figures 4A and 4B) will be taken from the separation zone (or other portions of vessel 10) and will be re-inserted into feed paste 84. Portion 284 mixes with feed paste 84 thus adjusting the concentration of the feed paste
    [0036] As mentioned above, the feeding system used in current achievements can have a variety of different configurations. Figure 5 shows a sedimentation vessel 10 with a 560 feeding system. Figure 5 is a cross-sectional view similar to that seen in Figures 2B, 3B and 4B. However, in Figure 5, the chamber 14 as well as the feeding system 560 are illustrated. Figure 5 shows a vessel 10 filled with paste being separated. Figure 5 teaches a feeding system that includes a feeding tube located at the top 550. This feeding tube 550 is seen at the top together with the sedimentation vessel 10. The feeding tube 550 is placed above (Ex. Placed above the vessel 10. In other embodiments, the feed tube located at the top 550 can simply be placed above the liquid level in the sedimentation vessel 10. When the feed paste leaves tube 550, it will enter feed well 568. As described above, the tube 550 and the feed well 568 are part of the feed system 560. As with the previous embodiments, the feed paste will pass through the feed tube 550 to the feed well 568 and will exit the feed well 568 (through of any resource) to the separation zone 18 where the solids and liquids will be separated In the realization of Figure 5, the paste leaves the feed well 568 through an opening in the bottom 569 of the feed well 568. (In some res achievements, the bottom of the feed pit 568 can be removed completely, thus allowing the paste to enter zone 18). The liquid (effluent) can be accumulated after passing over the spillway 30 (which can be a triangular spillway or not). In Figure 5, liquid can be accumulated in the trough 30 after passing over the spillway 30. Although not visible in Figure 5, a mechanism for scraping and / or gathering the solids from the bottom of the chamber 14 can also be used.
    [0037] As with previous embodiments, the supply system 560 of Figure 5 includes an air transport pump 270 that has an open end 282 at the bottom of the pump chamber 278. This open end is submerged below liquid level 586. Consequently, air from the diffuser 280 enters the pump chamber 278 and raises the portion 284 so that it can mix with the feed paste 84 (via conduit 590) in the feed tube 550 before inserting the feed paste in the feed well 568.
    [0038] It should be mentioned that food packaging chemicals can be used with any of the embodiments, including Figure 5. Food packaging chemicals can be added to feed well 568, chamber 14, feed tube 550, etc. . if desired. In other embodiments, food conditioning chemicals can be injected into the stream of pumped liquid ensuring delivery of previously diluted chemicals to the feed stream with at least a dilution rate between 0.2% and 5% of the feed stream rate onwards .
    [0039] Figure 6 is another embodiment of a sedimentation vessel 10 that incorporates current achievements. Figure 6 is an embodiment of a feeding system 660 that is similar to what has already been described in Figure 5. Consequently, for the sake of brevity, much of the previous description will not be repeated. Figure 6 is a cross-sectional view similar to that seen in Figures 2B, 3B and 4B. However, in Figure 6 the chamber 14, as well as the feeding system 660 are illustrated. Figure 6 shows vessel 10 filled with paste being separated. The feeding system 660 includes a feeding tube located at the top 550, a feeding well 568 and an air transport pump 270. The feeding system 660 is different from what is seen above in that it includes a feeding tube to the box drop 662. Specifically, after passing through the feed tube 550 (and mixing with the materials inserted by means of the air transport pump 270), the feed paste will pass through the feed tube to the drop box 662 before being inserted to the 668 feed pit. This 662 dropbox feed tube can be advantageous in some applications. After entering feed well 668, the slurry will leave feed well 668 through an opening in the bottom 668 of feed well 668 and enter separation zone 18 where solids and liquids will be separated.
    [0040] The operation of the 660 food well is similar to what has already been mentioned above. A portion 284 will be taken from the separation zone (or other portions of the vessel 10) and will be inserted back into feed slurry 84 in the drop box 661 or near it. The portion 284 is mixed with the slurry 84 thus adjusting the concentration of the slurry.
    [0041] Figure 7 is another embodiment of a sedimentation vessel 10 that incorporates current achievements. Figure 7 is an embodiment of a feeding system 760 that is similar to what has already been described in Figure 5. Consequently, for the sake of brevity, much of the previous description will not be repeated. Figure 7 is a cross-sectional view similar to that seen in Figures 2B, 3B and 4B. However, in Figure 7 the chamber 14, as well as the feeding system 760 are illustrated. Figure 7 shows vessel 10 filled with paste being separated. The feed system 760 includes a feed tube located at the top 550, a feed well 568 and an air transport pump 270. However, contrary to previous achievements, the feed tube 550 is submerged below the liquid level 786 in the separation zone 18. In other words, the supply system 760 includes a supply tube 550 located below the spillway 30 through which the separation liquid leaves the separation zone. The air transport pump 270 (as described above) will pump portion 284 (not shown in Figure 7) so that it can mix with the feed paste (via a 590 conduit) in the feed tube 550 before inserting the feed paste to the feed well 568.
    [0042] Figure 8 is another embodiment of a sedimentation vessel 10 that incorporates current achievements. Figure 8 is an embodiment of a feeding system 860 that is similar to what has already been described in Figure 5. Consequently, for the sake of brevity, much of the previous description will not be repeated. Figure 8 is a cross-sectional view similar to that seen in Figures 2B, 3B and 4B. However, in Figure 8 the chamber 14, as well as the feeding system 860 are illustrated. Figure 8 shows vessel 10 filled with paste being separated. The supply system 860 includes a supply pipe located at the top 550, a supply well 568 and an air transport pump 270. However, contrary to previous achievements, the air transport pump 270 is placed outside the chamber 14 Specifically, after the clarified liquid 86 passes over the spillway 30, it can exit the chamber 14. The liquid level of the chamber 14 is illustrated by the level 886. As it passes through the spillway 30, the liquid 86 is placed in the vessel. retention 890. Vessel 890 is outside chamber 14 and / or separation zone 18. The level of liquid in or near vessel 890 is represented by level 887. Air transport pump 270 can also be placed in or near the vessel 890. The air transport pump 270 will create a pressure differential that will pump the portion of liquid 86 out of vessel 890 towards the compressed air pump (s) 270 so that it can mix with the feed paste ( through conduit 590) in the feed tube 550 before inserting the feed paste into the feed well 568. The liquid remaining in vessel 890 can then be extracted and used if desired
    [0043] The embodiment shown in Figure 8 works in which the clarified liquid 86 is the portion 284 which is mixed with the slurry 84 to achieve dilution of the slurry 84. Current achievements can be designed in which the air transport pump 270 pumps the concentrated slurry separated into the smaller portion of the separation chamber 14 and used as portion 284 which is mixed with the paste. This concept can be known as seeding the paste with separate solids. Such recirculation of seed solids 80 can increase the concentration of solids in the paste to an ideal level.
    [0044] Figure 9 is another embodiment of a sedimentation vessel 10 that incorporates current achievements. Figure 9 is a cross-sectional view similar to that seen in Figures 2B, 3B and 4B. However, in Figure 9 the chamber 14, as well as the feeding system 960 are illustrated. Figure 9 shows vessel 10 filled with paste being separated. The feed system 960 includes a feed pipe located at the top 550, a feed well 568 and an air transport pump 270. The level of liquid (feed paste) in chamber 14 is represented by the number 986. As with the embodiment shown in Figure 8, the air transport pump 270 is stored inside vessel 890 which is outside chamber 14. In some embodiments of Figure 9, the feed paste, including solids and liquids, can enter vessel 890 through from passage 988. The level of feed slurry 84 (or perhaps the clarified liquid) in vessel 890 is represented by the number 987 and can be equal to level 986. The air transport pump 270 will pump the liquid and / or slurry out from vessel 890 towards the air transport pump so that it can mix with the feed paste (via conduit 590) in feed tube 550 before inserting the feed paste into feed well 568. In other embodiments , the achievement illustrated in Figure 9 could be used with a submerged feed tube, or another feeding system. Referring to all of the Figures in general, current embodiments also teach a method for optimizing the concentration of feed slurry 84 in the sedimentation vessel 10. The method involves obtaining a feeding system, such as the feeding systems described in this document. A quantity of feed paste 84 is also obtained, the feed paste being composed of a mixture of solids 80 and liquids 86. The feed paste is inserted into the separation zone 18 which is inside the sedimentation vessel 10. In this zone 18 , solids 90 are separated from liquid 86. More specifically, solids settle to the bottom of zone 18 and liquid 86 rises to the top. A 270 air transport pump is also added. The air transport pump 270 is used to pump at least a portion 284 of the slurry to settle, the solids separated or liquid separated from the separation zone 18 towards the feed system in such a way that the portion 284 is mixed with the feed paste 84. In some embodiments, the feed system includes a feed well where the method includes adding the feed paste to the feed well in such a way that a leftward rotation is created within the sedimentation vessel. In other embodiments, the interior of the feed pit includes one or more deflectors, where the method includes contacting the feed paste with the deflectors. The method may further include the step of adding chemical food conditioners 14 to the feed slurry 84 before mixing the feed slurry 84 with portion 284.
    [0045] Current realization can be accomplished in another specific way without departing from the essential structure, method and characteristics described extensively in this document and the claims. The achievements described must be considered representative in every respect, not restrictive. The extent of the invention is therefore indicated by the attached claims, rather than by continuous description. All changes that come within the meaning and scope of equivalence of the claims must be accepted to the fullest extent.
    权利要求:
    Claims (20)
    [0001]
    Feeding system (60, 260, 360, 460, 560, 760, 860, 960) for use in a sedimentation vessel (10), the feeding system (60, 260, 360, 460, 560, 760, 860, 960) FEATURED by the fact that it comprises: an inlet (54) for receiving a quantity of feedstock (84), wherein the feedstock (84) comprises a mixture of solids and liquids; a drain (56) for delivering the feed paste (84) to a separation zone (18) within the sedimentation vessel (10), in which some of the solids (80) in the feed paste (84) settle producing an amount of settled solids (80) and separated liquids; and an air transport pump (270) which transports at least a portion of separated solids and / or liquid separated from the separation zone (18) into the supply system (60, 260, 360, 460, 560, 760, 860, 960) in such a way that the portion mixes with the feed paste (84).
    [0002]
    Feeding system (60, 260, 360, 460, 560, 760, 860, 960), according to claim 1, CHARACTERIZED by the fact that the air transport pump (270) comprises an inlet (282a) that is positioned for collect the portion from the separated liquid.
    [0003]
    Feeding system (60, 260, 360, 460, 560, 760, 860, 960), according to claim 1, CHARACTERIZED by the fact that it comprises an apparatus (48) that mixes chemical food conditioners (45) inside the paste supply (84).
    [0004]
    Feeding system (60, 260, 360, 460, 560, 760, 860, 960), according to claim 1, CHARACTERIZED by the fact that the feeding system (60, 260, 360, 460, 560, 760, 860, 960) comprise a feed well (60, 268, 368, 468, 568, 668).
    [0005]
    Feeding system (60, 260, 360, 460, 560, 760, 860, 960), according to claim 4, CHARACTERIZED by the fact that the feed well (60, 268, 368, 468, 568, 668) comprises a trough (34, 274).
    [0006]
    Feeding system (60, 260, 360, 460, 560, 760, 860, 960), according to claim 4, CHARACTERIZED by the fact that the inside of the food well (60, 268, 368, 468, 568, 668) comprise one or more deflectors (382).
    [0007]
    Feeding system (60, 260, 360, 460, 560, 760, 860, 960), according to claim 6, CHARACTERIZED by the fact that the feed paste (84) enters the feed well (60, 268, 368, 468, 568, 668) in such a way that an anti-clockwise rotation is created inside the feed well (60, 268, 368, 468, 568, 668).
    [0008]
    Feeding system (60, 260, 360, 460, 560, 760, 860, 960), according to claim 7, CHARACTERIZED by the fact that there is only one deflector (482) with the set width (481).
    [0009]
    Feeding system (60, 260, 360, 460, 560, 760, 860, 960), according to claim 6, CHARACTERIZED by the fact that the feed paste (84) enters the feed well (60, 268, 368, 468, 568, 668) in such a way that it creates a clockwise rotation inside the feed well (60, 268, 368, 468, 568, 668).
    [0010]
    Feeding system (60, 260, 360, 460, 560, 760, 860, 960), according to claim 1, CHARACTERIZED by the fact that the feeding system (60, 260, 360, 460, 560, 760, 860, 960) comprises a supply pipe (264) which is below a spillway (30) through which the separated liquid leaves the separation zone (18).
    [0011]
    Feeding system (60, 260, 360, 460, 560, 760, 860, 960), according to claim 1, CHARACTERIZED by the fact that the feeding system (60, 260, 360, 460, 560, 760, 860, 960) comprise a supply tube (550) which is positioned above the sedimentation vessel (10).
    [0012]
    Feeding system (60, 260, 360, 460, 560, 760, 860, 960), according to claim 1, CHARACTERIZED by the fact that the feeding system (60, 260, 360, 460, 560, 760, 860, 960) comprises an external well (76) comprising an inlet (54).
    [0013]
    Feeding system (60, 260, 360, 460, 560, 760, 860, 960), according to claim 1, CHARACTERIZED by the fact that the feeding system (60, 260, 360, 460, 560, 760, 860, 960) comprise a drop tube supply pipe (662).
    [0014]
    Feeding system (60, 260, 360, 460, 560, 760, 860, 960), according to claim 1, CHARACTERIZED by the fact that the portion is mixed with the feed paste (84) between the inlet (54) and the drain (84).
    [0015]
    Feeding system (60, 260, 360, 460, 560, 760, 860, 960), according to claim 1, CHARACTERIZED by the fact that the amount of the portion mixed with the feed paste (84) can be adjusted.
    [0016]
    Method for optimizing the concentration of the feed paste (84) in a feed system for use in a sedimentation vessel (10) as defined in any one of claims 1 to 15, CHARACTERIZED by understanding the steps of: receiving an amount of feedstock (84), wherein the feedstock (84) comprises a mixture of solids and liquids; passing the feed paste (84) through a feeding system (60, 260, 360, 460, 560, 760, 860, 960) comprising: an inlet (54) for receiving the quantity of feedstock (84); and a drain (56) to deliver the feed paste (84) to an area separator (18) inside the sedimentation vessel (10), allowing some of the solids (80) of the feed paste (84) settle within the se-Method zone to optimize the concentration of the feed paste (84) in a feed system for use in a sedimentation vessel (10) as defined in any of claims 1 to 15, CHARACTERIZED by understanding the steps of: receiving an amount of feedstock (84), wherein the feedstock (84) comprises a mixture of solids and liquids; passing the feed paste (84) through a feeding system (60, 260, 360, 460, 560, 760, 860, 960) comprising: an inlet (54) for receiving the quantity of feedstock (84); and a drain (56) to deliver the feed paste (84) to an area separator (18) inside the sedimentation vessel (10), allowing some of the solids (80) of the feed paste (84) settle within the se-Method zone to optimize the concentration of the feed paste (84) in a feed system for use in a sedimentation vessel (10) as defined in any of claims 1 to 15, CHARACTERIZED by understanding the steps of: receiving an amount of feedstock (84), wherein the feedstock (84) comprises a mixture of solids and liquids; passing the feed paste (84) through a feeding system (60, 260, 360, 460, 560, 760, 860, 960) comprising: an inlet (54) for receiving the quantity of feedstock (84); and a drain (56) to deliver the feed paste (84) to an area separator (18) inside the sedimentation vessel (10), allowing some the solids (80) of the feed paste (84) settle within the separation zone (18) producing an amount of settled solids (80) and an amount of separated liquids; and pump, by means of an air transport pump (270), at least a portion of settled solids and / or separated liquid from the separation zone (18) into the supply system (60, 260, 360, 460, 560, 760, 860, 960) in such a way that the portion mixes with the feed paste (84).
    [0017]
    Method, according to claim 16, CHARACTERIZED by the fact that the portion dilutes the feed paste (84) to a concentration that is optimal for separation.
    [0018]
    Method according to claim 16, CHARACTERIZED in that it additionally comprises the step of adding the feed paste (84) to a feed well (60, 268, 368, 468, 568, 668) in such a way that a rotation counterclockwise is created inside the feed well (60, 268, 368, 468, 568, 668).
    [0019]
    Method according to claim 16, CHARACTERIZED by the fact that it additionally comprises the step of contacting the feed paste (84) with one or more deflectors (382, 482) arranged inside the feed pit (60, 268, 368 , 468, 568, 668).
    [0020]
    Method, according to claim 16, CHARACTERIZED by the fact that it additionally comprises the step of adding food packaging chemicals (45).
    类似技术:
    公开号 | 公开日 | 专利标题
    BR112012010753B1|2020-09-24|FEEDING SYSTEM FOR USE IN A SEDIMENTATION POT AND METHOD FOR OPTIMIZING THE CONCENTRATION OF THE FOOD PASTE IN A SEDIMENTATION POT
    US6193070B1|2001-02-27|Apparatus for separating solids drilling fluids
    KR101654508B1|2016-09-05|Wastewater pressurized uprising apparatus combined inclined settling tank
    KR100919367B1|2009-09-29|Flotation device using high efficiency tank for dissolving a gases into liquids
    CA2665780C|2013-08-20|Thickener and method for thickening
    RU2583268C1|2016-05-10|Gas-liquid separator
    KR101334950B1|2013-11-29|Sewage and wastewater treatment apparatus
    KR20160050044A|2016-05-10|Gas flotation tank
    US5091083A|1992-02-25|Flotation separation system
    JP5619379B2|2014-11-05|Solid-liquid separator
    AU2009246040A1|2009-11-19|Apparatus and method for mechanical deaeration
    BR112012013862B1|2020-11-10|feeding structure for use with a sedimentation container
    WO2013067343A1|2013-05-10|Flotation cell vortex stabilizer
    US5242600A|1993-09-07|Wastewater separation system
    US20190291025A1|2019-09-26|Apparatus and method for treating slurries
    CN110127815A|2019-08-16|A kind of gun barrel being provided with central tube
    US2672982A|1954-03-23|Solids retention apparatus for streams
    JP2010194383A|2010-09-09|Screen device
    KR980008278A|1998-04-30|Wastewater Recovery Separator
    NL7906484A|1980-03-27|DEVICE FOR PURIFYING POLLUTANT POLLUTANTS.
    US2966268A|1960-12-27|Method and apparatus for removing sediment
    FR2483799A1|1981-12-11|Lamellar flow decantation plant to clarify treated waste water etc. - has simplified, more compact construction for given treatment capacity
    JP2006198571A|2006-08-03|Precipitator
    CN214050614U|2021-08-27|Sludge treatment separation tower
    WO2018173772A1|2018-09-27|Sludge blanket type sludge condensing device, method for operating sludge blanket type sludge condensing device, and flow straightener
    同族专利:
    公开号 | 公开日
    BR112012010753A2|2016-03-29|
    CA2779608C|2013-06-11|
    TR201205676T1|2013-01-21|
    RU2012123022A|2013-12-10|
    CL2012001173A1|2012-09-14|
    CA2779608A1|2011-05-12|
    WO2011056305A1|2011-05-12|
    US8123955B2|2012-02-28|
    US20110100931A1|2011-05-05|
    MA34121B1|2013-04-03|
    ZA201203240B|2013-07-31|
    AU2010315785B2|2013-08-22|
    MX2012005241A|2012-10-01|
    AU2010315785A1|2012-05-31|
    PE20130532A1|2013-05-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3532218A|1967-07-11|1970-10-06|American Cyanamid Co|Apparatus for flocculating and thickening|
    US3473665A|1968-07-31|1969-10-21|Union Tank Car Co|Flow control means for water treating apparatus|
    GB1309737A|1969-07-05|1973-03-14|Kearney T J|Dispersal of materials in liquids|
    US4376045A|1981-05-11|1983-03-08|Ecodyne Corporation|Liquid treatment apparatus|
    US5147556A|1988-11-17|1992-09-15|Supaflo Pty. Limited|Thickener|
    US5389250A|1991-09-26|1995-02-14|Baker Hughes Incorporated|Self diluting feedwell for thickener dilution|
    US5944995A|1998-01-26|1999-08-31|Baker Hughes Incorporated|Clarifier feedwell|
    AU2003200823B2|2002-03-05|2008-09-18|Flsmidth A/S|Self diluting feedwell including a vertical eduction mechanism and method of dilution employing same|
    US6869534B2|2002-05-05|2005-03-22|Brentwood Industries, Inc.|Sludge digestion methods and apparatus|
    AUPS217702A0|2002-05-07|2002-06-06|Outokumpu Oyj|Dilution apparatus for a thickener|
    TWI376354B|2003-12-03|2012-11-11|Miike Tekkosho Kk|An apparatus for smashing organic substance particles|
    US7547396B2|2006-10-25|2009-06-16|Flsmidth Technology A/S|Thickener/clarifier feedwell assembly with froth dissipation|
    US7988865B2|2009-12-04|2011-08-02|Flsmidth A/S|Feedwell dilution system for thickeners in oil sands|US8440087B2|2007-12-04|2013-05-14|Delkor Pty., Ltd|Thickeners having self-diluting feedwell|
    WO2011035364A1|2009-09-22|2011-03-31|Water SolutionsPty Ltd|Separator|
    CA2714735C|2010-09-14|2014-01-14|Suncor Energy Inc.|Settler with overflow recycle|
    CA2729457C|2011-01-27|2013-08-06|Fort Hills Energy L.P.|Process for integration of paraffinic froth treatment hub and a bitumen ore mining and extraction facility|
    CA2906715C|2011-02-25|2016-07-26|Fort Hills Energy L.P.|Process for treating high paraffin diluted bitumen|
    CA2733342C|2011-03-01|2016-08-02|Fort Hills Energy L.P.|Process and unit for solvent recovery from solvent diluted tailings derived from bitumen froth treatment|
    CA2806588C|2011-03-04|2014-12-23|Fort Hills Energy L.P.|Process for solvent addition to bitumen froth with in-line mixing and conditioning stages|
    CA2735311C|2011-03-22|2013-09-24|Fort Hills Energy L.P.|Process for direct steam injection heating of oil sands bitumen froth|
    CA2805804C|2011-04-28|2014-07-08|Fort Hills Energy L.P.|Process and tsru with inlet with multiple nozzle configuration for distribution of solvent diluted tailings|
    CA2857702C|2011-05-04|2015-07-07|Fort Hills Energy L.P.|Process for operating a bitumen froth treatment operation in turndown mode|
    CA2832269C|2011-05-18|2017-10-17|Fort Hills Energy L.P.|Temperature control of bitumen froth treatment process with trim heating of solvent streams|
    US10040004B2|2014-09-25|2018-08-07|ClearCove Systems, Inc.|Method for mixing industrial waste water within a gravity settling tank|
    US10040697B2|2015-09-11|2018-08-07|ClearCove Systems, Inc.|Method for mixing industrial waste water within a gravity settling tank|
    SE1751419A1|2017-11-17|2019-04-23|Valmet Oy|Green liquor clarification using sedimentation tank during white liquor preparation|
    AT522689B1|2020-06-15|2021-01-15|Andritz Delkor Pty Ltd|DEVICE AND METHOD FOR SEPARATING A SUSPENSION|
    法律状态:
    2018-04-10| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2018-12-04| B06T| Formal requirements before examination [chapter 6.20 patent gazette]|Free format text: O DEPOSITANTE DEVE RESPONDER A EXIGENCIA FORMULADA NESTE PARECER POR MEIO DO SERVICO DE CODIGO 206 EM ATE 60 (SESSENTA) DIAS, A PARTIR DA DATA DE PUBLICACAO NA RPI, SOB PENA DO ARQUIVAMENTO DO PEDIDO, DE ACORDO COM O ART. 34 DA LPI.PUBLIQUE-SE A EXIGENCIA (6.20). |
    2019-05-14| B07A| Application suspended after technical examination (opinion) [chapter 7.1 patent gazette]|
    2019-08-20| B06G| Technical and formal requirements: other requirements [chapter 6.7 patent gazette]|Free format text: NA PETICAO DE MANIFESTACAO A CIENCIA DE PARECER (PETICAO NO 870190077760, DE 12/08/2019) FORAM APRESENTADAS 20 REIVINDICACOES. CONTUDO, NA OCASIAO DO PEDIDO DE EXAME (PETICAO NO 020120078795, DE 22/08/2012) FOI RECOLHIDA A TAXA RELATIVA AO EXAME DAS 19 REIVINDICACOES.CONFORME A IN INPI/DIRPA NO 03 DE 30/09/2016, O DEPOSITANTE DEVERA COMPLEMENTAR A RETRIBUICAO RELATIVA AO PEDIDO DE EXAME DO PRESENTE PEDIDO, DE ACORDO COM TABELA VIGENTE, REFERENTE A(S) GUIA(S) DE RECOLHIMENTO 0000921205659012 (PETICAO NO 020120078795, DE 22/08/2012).PUBLIQUE-SE A EXIGENCIA (6.7). |
    2020-03-31| B06A| Patent application procedure suspended [chapter 6.1 patent gazette]|
    2020-09-01| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2020-09-24| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 10 (DEZ) ANOS CONTADOS A PARTIR DE 24/09/2020, OBSERVADAS AS CONDICOES LEGAIS. |
    2022-02-01| B25A| Requested transfer of rights approved|Owner name: WESTECH ENGINEERING, INC. (US) |
    2022-02-08| B25G| Requested change of headquarter approved|Owner name: WESTECH ENGINEERING, INC. (US) |
    优先权:
    申请号 | 申请日 | 专利标题
    US12/613.131|2009-11-05|
    US12/613,131|US8123955B2|2009-11-05|2009-11-05|Method of optimizing feed concentration in a sedimentation vessel|
    PCT/US2010/049442|WO2011056305A1|2009-11-05|2010-09-20|Method of optimizing feed concentration in a sedimentation vessel|
    [返回顶部]