Recovery device

Abstract

The application provides a recycling device. The recycling device comprises a shell having a recycling cavity, an air inlet and an air outlet, the air inlet being communicated with the air outlet through the recycling cavity, and the air inlet being located below the air outlet; a spraying assembly arranged in the recycling cavity, the spraying assembly comprising at least two spraying structures arranged oppositely, and a washing space for washing the gas to be washed being formed around the at least two spraying structures; wherein the spraying assembly is at least two groups, the at least two groups of spraying assemblies are arranged at intervals along the height direction of the shell, the spraying structures in at least one group of spraying assemblies have water mist nozzles for spraying water mist into the washing space, the spraying structures in at least another group of spraying assemblies have water curtain nozzles for spraying water curtain into the washing space, and the water mist nozzles are located below the water curtain nozzles. The application effectively solves the problem of poor recycling effect of the recycling device for recycling amine in the prior art.

Description

Technical Field

[0001] This invention relates to the field of amine recovery technology, and more specifically, to a recovery device. Background Technology

[0002] Currently, carbon dioxide capture technology, as an emerging technology developed in recent years, can be used to remove carbon dioxide from industrial exhaust gases, thereby reducing carbon emissions during industrial production processes.

[0003] In existing technologies, chemical absorption, which utilizes the chemical reaction between chemical reagents and carbon dioxide to capture carbon dioxide, is the most mature technology for carbon dioxide capture. Amine-based carbon dioxide capture technology, using amine solutions as absorbents, is the primary method. However, amines are low-density, low-boiling-point, and high-vapor-pressure volatiles. A significant problem with amine-based carbon dioxide capture technology is that some of the absorbent (amine) is lost with the flue gas. The main pollutants emitted by amine-based carbon dioxide chemical absorption systems are amines entrained in the flue gas, volatile gaseous amines, and tiny amine droplets existing in aerosol form. Among these, the tiny amine droplets in aerosol form are formed by the condensation of gaseous amine vapor components in the amine absorbent and are also the main form of amine escape. To avoid economic losses and environmental pollution caused by amine escape, existing technologies are improving the recovery towers used for flue gas purification, such as by adding spray devices and water washing devices to remove the aforementioned escaped amines from the flue gas as much as possible.

[0004] However, conventional spraying methods cannot ensure that the sprayed liquid can make stable collisions with the tiny amine droplets in aerosol form and carry away the amine, resulting in poor recovery efficiency. Summary of the Invention

[0005] The main objective of this invention is to provide a recovery device to solve the problem of poor recovery efficiency in existing amine recovery devices.

[0006] To achieve the above objectives, the present invention provides a recycling device, comprising: a housing having a recycling chamber, an air inlet, and an air outlet, wherein the air inlet is connected to the air outlet through the recycling chamber and is located below the air outlet; and a spray assembly disposed within the recycling chamber, the spray assembly comprising at least two oppositely arranged spray structures, the at least two spray structures surrounding each other to form a washing space for washing the gas to be washed; wherein the spray assembly comprises at least two sets, the at least two sets of spray assemblies being spaced apart along the height direction of the housing, the spray structures in at least one set of spray assemblies having water mist nozzles for spraying water mist into the washing space, and the spray structures in at least another set of spray assemblies having water curtain nozzles for spraying a water curtain into the washing space, the water mist nozzles being located below the water curtain nozzles.

[0007] Furthermore, the recycling device also includes: a liquid supply structure connected to the spray structure, the liquid supply structure being used to supply washing liquid to the spray structure; wherein, there are at least two liquid supply structures, and at least two liquid supply structures are arranged in a one-to-one correspondence with at least two spray components, and the types of washing liquid supplied by the at least two liquid supply structures are different.

[0008] Furthermore, the spray assembly for spraying water mist is a first spray assembly, and the spray assembly for spraying water curtain is a second spray assembly. The first spray assembly is located below the second spray assembly. The spraying direction of the spraying structure of the first spray assembly is set at a first angle A with the flow direction of the gas to be washed. The first angle A satisfies: 90°≤A≤180°.

[0009] Furthermore, the recovery device also includes a tubular guide structure disposed between the spray assembly and the air inlet. The tubular guide structure includes an interconnected air collection section and a guide section. The air collection section is located below the guide section, and the inner diameter of the air collection section gradually decreases along the direction from the air inlet to the air outlet.

[0010] Furthermore, there is a flow gap H between the end of the gas collection section away from the guide section and the wall of the recovery chamber, and the flow gap H satisfies: 1cm≤H≤5cm.

[0011] Furthermore, the projections of each spray structure onto the tubular guide structure are all located within the air collection section of the tubular guide structure.

[0012] Furthermore, the shell also has a liquid outlet communicating with the recovery chamber, which is located on the bottom wall of the recovery chamber; wherein, the bottom wall of the recovery chamber is an arc-shaped surface, and the arc-shaped surface protrudes toward the side away from the recovery chamber.

[0013] Furthermore, the recovery device also includes a filter structure disposed between the air inlet and the liquid outlet, the filter structure being used to filter the liquid flowing toward the liquid outlet.

[0014] Furthermore, the recycling device also includes: a drive unit; a cleaning structure movably mounted on the filter structure; wherein the drive unit is driven to the cleaning structure via a screw and nut mechanism, so as to clean the filter structure when the drive unit drives the cleaning structure to reciprocate in a preset direction.

[0015] Furthermore, the recovery device also includes: a control module; a detection device, installed at the liquid outlet, used to detect the liquid flow rate at the liquid outlet; wherein, the control module is connected to both the detection device and the drive device, and the control module controls at least one of the rotational speed or direction of the drive device according to the detection value of the detection device.

[0016] According to the technical solution of this invention, the housing of the recovery device has a recovery chamber, an air inlet, and an air outlet. The air inlet communicates with the air outlet through the recovery chamber and is located below the air outlet. A spray assembly is disposed within the recovery chamber, and the spray assembly includes at least two opposing spray structures, which surround each other to form a washing space for washing the gas to be washed. There are at least two sets of spray assemblies, spaced apart along the height direction of the housing. At least one set of spray assemblies has a water mist nozzle for spraying water mist into the washing space, and at least another set of spray assemblies has a water curtain nozzle for spraying a water curtain into the washing space, with the water mist nozzle located below the water curtain nozzle. In this way, during the operation of the recovery device, the high-temperature flue gas introduced into the recovery chamber through the air inlet can spontaneously flow to the air outlet. Since the water mist nozzle is located below the water curtain nozzle, the tiny amine droplets entrained in the high-temperature flue gas can first collide with the denser and smaller atomized washing liquid. The larger tiny amine droplets absorb the washing liquid, and their volume increases further before falling under the action of gravity. The smaller tiny amine droplets also increase in volume after absorbing the washing liquid, thereby increasing the intensity of their collision with the water curtain washing liquid sprayed from the water curtain nozzle. This ensures that most of the tiny amine droplets in the flue gas can be recovered, thus solving the problem of poor recovery effect in existing amine recovery devices. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0018] Figure 1 A schematic diagram of the overall structure of an embodiment of the recycling device according to the present invention is shown.

[0019] The above figures include the following reference numerals:

[0020] 10. Shell; 11. Recovery chamber; 12. Air inlet; 13. Air outlet; 14. Liquid outlet;

[0021] 20. Spray assembly; 21. Spray structure; 22. Washing space; 23. First spray assembly; 24. Second spray assembly;

[0022] 30. Tubular guide structure; 31. Gas collection section; 32. Guide section;

[0023] 40. Filter structure; 50. Drive unit; 60. Cleaning structure; 70. Detection device. Detailed Implementation

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0026] In this invention, unless otherwise stated, directional terms such as "up" and "down" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" are generally used in relation to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0027] To address the problem of poor recovery efficiency in existing amine recovery devices, this application provides a recovery device.

[0028] like Figure 1 As shown, the recovery device includes: a housing 10 having a recovery chamber 11, an air inlet 12, and an air outlet 13, the air inlet 12 communicating with the air outlet 13 through the recovery chamber 11, and the air inlet 12 being located below the air outlet 13; a spray assembly 20 disposed within the recovery chamber 11, the spray assembly 20 including at least two oppositely arranged spray structures 21, the at least two spray structures 21 surrounding each other to form a washing space 22 for washing the gas to be washed. The spray assembly 20 is provided in at least two sets, the at least two sets of spray assemblies 20 being spaced apart along the height direction of the housing 10; at least one set of spray assemblies 20 has spray structures 21 with water mist nozzles for spraying water mist into the washing space 22, and at least another set of spray assemblies 20 has spray structures 21 with water curtain nozzles for spraying a water curtain into the washing space 22, the water mist nozzles being located below the water curtain nozzles.

[0029] Applying the technical solution of this embodiment, the housing of the recycling device has a recycling chamber 11, an air inlet 12, and an air outlet 13. The air inlet 12 communicates with the air outlet 13 through the recycling chamber 11 and is located below the air outlet 13. A spray assembly 20 is disposed in the recycling chamber 11. The spray assembly 20 includes at least two oppositely arranged spray structures 21, which surround each other to form a washing space 22 for washing the gas to be washed. There are at least two sets of spray assemblies 20, which are spaced apart along the height direction of the housing. At least one set of spray structures 21 has a water mist nozzle for spraying water mist into the washing space, and at least another set of spray structures 21 has a water curtain nozzle for spraying a water curtain into the washing space. The water mist nozzle is located below the water curtain nozzle. In this way, during the operation of the recovery device, the high-temperature flue gas introduced into the recovery chamber 11 through the air inlet 12 can spontaneously flow to the air outlet 13. Since the water mist nozzle is located below the water curtain nozzle, the tiny amine droplets entrained in the high-temperature flue gas can first collide with the denser and smaller-volume mist washing liquid. The larger-volume tiny amine droplets absorb the washing liquid, and their volume increases further before falling under the action of gravity. The smaller-volume tiny amine droplets also increase in volume after absorbing the washing liquid, thereby increasing the intensity of their collision with the water curtain washing liquid sprayed by the water curtain nozzle. This ensures that most of the tiny amine droplets in the flue gas can be recovered, thus solving the problem of poor recovery effect of existing amine recovery devices.

[0030] In this embodiment, there are four sets of spray components 20, with two sets of spray components 20 arranged opposite to the other two sets of spray components 20 to form a washing space 22.

[0031] In this embodiment, a set of spray components 20 is provided with multiple spray structures 21. The spray structures 21 in two sets of spray components 20 that are arranged opposite each other actually form a spray layer. That is, multiple spray layers are actually formed in the recovery chamber 11. The spray layers capture amine droplets in the flue gas layer by layer to maximize the recovery rate of amine.

[0032] Specifically, the two sets of spray components 20 simultaneously spray washing liquid into the washing space 22, which can further increase the density of the washing liquid in the washing space 22, so as to ensure that the amine droplets can have a stable collision with the washing liquid.

[0033] Specifically, the water curtain nozzle can spray a water curtain to further ensure that all amine droplets can collide with the washing liquid.

[0034] It should be noted that the difference between a water mist nozzle and a water curtain nozzle lies in their nozzle structure, which is relatively conventional and will not be elaborated upon here.

[0035] Optionally, the recovery device further includes a liquid supply structure connected to the spray structure 21, which supplies washing liquid to the spray structure 21. There are at least two liquid supply structures, each corresponding to one of the at least two spray components 20, and the types of washing liquid supplied by the at least two liquid supply structures are different. In this way, by supplying liquid through multiple liquid supply structures, the multiple spray components 20 can spray different types of washing liquid, further improving the amine recovery efficiency.

[0036] In this embodiment, there are two liquid supply structures, one of which is connected to two oppositely arranged spray components 20.

[0037] Specifically, the specific structure of the liquid supply system will not be elaborated here; it can be formed by a simple combination of a tank, pipelines, and a water pump.

[0038] Specifically, the washing liquid can be water or different types of acidic solutions.

[0039] In this embodiment, the spray assembly 20 for spraying water mist is the first spray assembly 23, and the spray assembly 20 for spraying water curtain is the second spray assembly 24. The first spray assembly 23 is located below the second spray assembly 24. The spraying direction of the spray structure 21 of the first spray assembly 23 is set at a first angle A with the flow direction of the gas to be washed, where the first angle A satisfies: 90°≤A≤180°. This arrangement ensures that the spraying direction of the mist-like washing liquid is at an obtuse angle with the flow direction of the flue gas, allowing for a more intense collision between the mist spray and the amine droplets in the flue gas. Simultaneously, this arrangement also slows down the flow velocity of the flue gas through the mist spray, further ensuring that all amine droplets collide with the washing liquid.

[0040] like Figure 1 As shown, the recovery device also includes a tubular guide structure 30, which is disposed between the spray assembly 20 and the air inlet 12. The tubular guide structure 30 includes an interconnected gas collecting section 31 and a guide section 32. The gas collecting section 31 is located below the guide section 32, and its inner diameter gradually decreases along the direction from the air inlet 12 to the air outlet 13. In this way, the tubular guide structure 30 can effectively collect the flue gas and correct its flow direction, thereby further increasing the intensity of the collision between the flue gas and the washing liquid.

[0041] In this embodiment, the guide section 32 is a vertical pipe section.

[0042] In this embodiment, the gas collection section 31 is a cone-shaped gas collection hood.

[0043] Optionally, a flow gap H is provided between the end of the gas collecting section 31 furthest from the guide section 32 and the wall of the recovery chamber 11, wherein the flow gap H satisfies: 1cm ≤ H ≤ 5cm. This allows the washing liquid and amine droplets falling onto the tubular guide structure 30 to flow along the outer surface of the gas collecting section 31 and through the flow gap to the area below the tubular guide structure 30, thus preventing the accumulation of washing liquid and amine droplets between the tubular guide structure 30 and the wall of the recovery chamber 11. Simultaneously, this arrangement ensures that the size of the flow gap H is appropriate, guaranteeing smooth flow of washing liquid and amine droplets while preventing flue gas from flowing out through the flow gap H.

[0044] Specifically, the area above the flow gap is actually a spray structure 21. In fact, even if two spray components 20 are arranged opposite each other, the sprayed washing liquid is difficult to spray between two adjacent spray structures 21 due to the structure of the spray structure 21. If the flue gas flows out through the flow gap, it will most likely flow along the gap between multiple spray structures 21. At this time, this part of the flue gas cannot be sprayed. The above-mentioned arrangement of the flow gap H ensures that most of the flow gap H can be filled with washing liquid and amine droplets to prevent the flue gas from flowing out through the flow gap.

[0045] In this embodiment, the projections of each spray structure 21 onto the tubular guide structure 30 are all located within the gas collection section 31 of the tubular guide structure 30. Thus, along the height direction of the casing, the flue gas flowing out after being guided by the tubular guide structure 30 can be staggered from the spray structures 21, preventing the flue gas from carrying amine droplets that flow between the spray structures 21 and thus preventing those amine droplets from being sprayed, further improving the recovery effect of the recovery device.

[0046] In this embodiment, the housing 10 also has a liquid outlet 14 communicating with the recovery chamber 11, and the liquid outlet 14 is disposed on the bottom wall of the recovery chamber 11. The bottom wall of the recovery chamber 11 is an arc-shaped surface, protruding towards the side away from the recovery chamber 11. In this way, the bottom wall of the recovery chamber 11 can effectively form a guiding surface to guide the amine droplets and washing liquid flowing onto the bottom wall of the recovery chamber 11 to spontaneously flow towards the liquid outlet 14 and eventually out, thereby simplifying the structure of the recovery device.

[0047] In this embodiment, the recovery device further includes a filter structure 40, which is disposed between the air inlet 12 and the liquid outlet 14. The filter structure 40 is used to filter the liquid flowing towards the liquid outlet 14. In this way, as the amine droplets and washing liquid flow towards the bottom wall of the recovery chamber 11, the filter structure 40 can filter impurities in the amine droplets and washing liquid to prevent impurities from flowing with the amine droplets and washing liquid into subsequent devices and causing damage to them.

[0048] Optionally, the filter structure 40 is a filter screen.

[0049] In this embodiment, the recovery device further includes a drive device 50 and a cleaning structure 60, the cleaning structure 60 being movably mounted on the filter structure 40. The drive device 50 is connected to the cleaning structure 60 via a lead screw and nut mechanism, so that the filter structure 40 is cleaned when the drive device 50 drives the cleaning structure 60 to reciprocate in a preset direction. This arrangement prevents impurities from clogging the filter structure 40 and affecting the flow of amine droplets and washing liquid. Simultaneously, the drive device 50 can automatically drive the cleaning structure 60 to move, achieving automated cleaning of the filter structure 40 by the cleaning structure 60.

[0050] In this embodiment, the cleaning structure 60 is a cleaning steel brush.

[0051] Optionally, the drive device 50 is a servo motor, and the drive device 50 is connected to the cleaning structure 60 through a lead screw and nut mechanism to drive the cleaning structure 60 to move.

[0052] In this embodiment, the recycling device further includes a control module and a detection device 70. The detection device 70 is located at the liquid outlet 14 and is used to detect the liquid flow rate at the liquid outlet 14. The control module is connected to both the detection device 70 and the drive device 50. The control module controls at least one of the rotational speed or direction of the drive device 50 based on the detection value from the detection device 70. Thus, the control module can automatically control the movement of the drive device 50 based on the detection value from the detection device 70, thereby achieving automatic and timely cleaning of the cleaning structure 60 and improving the intelligence level of the recycling device.

[0053] In this embodiment, the detection device 70 is a flow sensor.

[0054] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects:

[0055] The housing of the recovery device has a recovery chamber, an air inlet, and an air outlet. The air inlet communicates with the air outlet through the recovery chamber and is located below the air outlet. A spray assembly is disposed within the recovery chamber and includes at least two opposing spray structures, which surround each other to form a washing space for washing the gas to be washed. There are at least two sets of spray assemblies, spaced apart along the height of the housing. At least one set of spray assemblies has a water mist nozzle for spraying water mist into the washing space, and at least another set of spray assemblies has a water curtain nozzle for spraying a water curtain into the washing space, with the water mist nozzle located below the water curtain nozzle. In this way, during the operation of the recovery device, the high-temperature flue gas introduced into the recovery chamber through the air inlet can spontaneously flow to the air outlet. Since the water mist nozzle is located below the water curtain nozzle, the tiny amine droplets entrained in the high-temperature flue gas can first collide with the denser and smaller atomized washing liquid. The larger tiny amine droplets absorb the washing liquid, and their volume increases further before falling under the action of gravity. The smaller tiny amine droplets also increase in volume after absorbing the washing liquid, thereby increasing the intensity of their collision with the water curtain washing liquid sprayed from the water curtain nozzle. This ensures that most of the tiny amine droplets in the flue gas can be recovered, thus solving the problem of poor recovery effect in existing amine recovery devices.

[0056] Obviously, the embodiments described above are merely some, not all, embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

[0057] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0058] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0059] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A recycling device, characterized in that, include: The housing (10) has a recovery chamber (11), an air inlet (12) and an air outlet (13). The air inlet (12) is connected to the air outlet (13) through the recovery chamber (11), and the air inlet (12) is located below the air outlet (13). A spray assembly (20) is disposed in the recovery chamber (11). The spray assembly (20) includes at least two oppositely disposed spray structures (21), and the at least two spray structures (21) surround each other to form a washing space (22) for washing the gas to be washed. The spray assembly (20) is at least two sets, and the at least two sets of spray assemblies (20) are spaced apart along the height direction of the housing (10). The spray structure (21) in at least one set of spray assemblies (20) has a water mist nozzle for spraying water mist into the washing space (22), and the spray structure (21) in at least another set of spray assemblies (20) has a water curtain nozzle for spraying a water curtain into the washing space (22). The water mist nozzle is located below the water curtain nozzle. The recycling device further includes a tubular guide structure (30) disposed between the spray assembly (20) and the air inlet (12). The tubular guide structure (30) includes an interconnected gas collecting section (31) and a guide section (32). The gas collecting section (31) is located below the guide section (32). Along the direction from the air inlet (12) to the air outlet (13), the inner diameter of the gas collecting section (31) gradually decreases. The projection of each spray structure (21) onto the tubular guide structure (30) is located within the air collection section (31) of the tubular guide structure (30).

2. The recycling device according to claim 1, characterized in that, The recycling device also includes: A liquid supply structure is connected to the spray structure (21), and the liquid supply structure is used to supply washing liquid to the spray structure (21); The liquid supply structure is at least two, and the at least two liquid supply structures are arranged in a one-to-one correspondence with the at least two spray components (20). The types of washing liquid supplied by the at least two liquid supply structures are different.

3. The recycling device according to claim 2, characterized in that, The spray assembly (20) for spraying water mist is the first spray assembly (23), and the spray assembly (20) for spraying water curtain is the second spray assembly (24). The first spray assembly (23) is located below the second spray assembly (24). The spraying direction of the spraying structure (21) of the first spray assembly (23) is set at a first angle A with the flow direction of the gas to be washed. The first angle A satisfies: 90°≤A≤180°.

4. The recycling device according to claim 1, characterized in that, The gas collecting section (31) has a flow gap H between the end away from the guide section (32) and the wall of the recovery chamber (11), and the flow gap H satisfies: 1cm≤H≤5cm.

5. The recycling device according to claim 1, characterized in that, The housing (10) also has a liquid outlet (14) communicating with the recovery chamber (11), and the liquid outlet (14) is disposed on the bottom wall of the recovery chamber (11); The bottom wall of the recovery chamber (11) is an arc-shaped surface, which protrudes toward the side away from the recovery chamber (11).

6. The recycling device according to claim 5, characterized in that, The recycling device also includes: A filter structure (40) is disposed between the air inlet (12) and the liquid outlet (14), and the filter structure (40) is used to filter the liquid flowing to the liquid outlet (14).

7. The recycling device according to claim 6, characterized in that, The recycling device also includes: Drive unit (50); A cleaning structure (60) is movably disposed on the filter structure (40); The drive device (50) is connected to the cleaning structure (60) via a screw and nut mechanism to clean the filter structure (40) when the drive device (50) drives the cleaning structure (60) to reciprocate in a preset direction.

8. The recycling device according to claim 7, characterized in that, The recycling device also includes: Control module; A detection device (70) is provided at the liquid outlet (14), and the detection device (70) is used to detect the liquid flow rate at the liquid outlet (14); The control module is connected to both the detection device (70) and the drive device (50). The control module controls at least one of the rotational speed or direction of the drive device (50) based on the detection value of the detection device (70).

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