Solution recovery device

Abstract

The invention provides a solution recovery device. A shell of the solution recovery device is provided with a recovery cavity, an air inlet part and an air outlet part, the air inlet part is communicated with the air outlet part through the recovery cavity, and the air inlet part is located below the air outlet part; the washing structure is arranged in the recovery cavity and located between the gas inlet part and the gas outlet part, the washing structure is provided with a gas inlet, a washing cavity and a gas outlet, and gas entering the washing cavity from the gas inlet is discharged from the gas outlet after being washed by washing liquid; the guiding structures are arranged in the recycling cavity and located between the washing structure and the air inlet part, the multiple guiding structures are arranged at intervals in the preset direction, and a guiding channel is defined by the guiding structures and at least part of the cavity wall of the recycling cavity; a guide channel is formed between every two adjacent guide structures in a surrounding mode. Wherein the air inlet part is communicated with the air inlet through a guide channel, and the guide channel is arranged in a broken line shape; or the guide channel is arranged in a wave shape. The problem that in the prior art, a recycling device for recycling amine is poor in recycling effect is effectively solved.

Description

Technical Field

[0001] The invention relates to the technical field of amine recovery, and in particular to a solution recovery device. Background Art

[0002] At present, carbon dioxide capture technology, as an emerging technology developed in recent years, can be used to remove carbon dioxide from industrial exhaust gas to reduce carbon emissions in industrial production processes.

[0003] In the prior art, the chemical absorption method that uses the chemical reaction between chemical reagents and carbon dioxide to capture carbon dioxide is the most mature technology for capturing carbon dioxide, and the amine-based carbon dioxide capture technology using amine solution as absorbent is the main method of carbon dioxide capture technology. However, amine is a volatile substance with low density, low boiling point and high vapor pressure. An important problem of the amine-based carbon dioxide capture technology is that part of the absorbent (amine) will be lost with the escape of flue gas, and the main pollutants emitted by the amine-based carbon dioxide chemical absorption system are actually amines entrained in the flue gas, gaseous amines based on volatility, and tiny amine droplets in the form of aerosols; among them, the tiny amine droplets in the form of aerosols are formed by the condensation of the gas phase amine vapor components in the amine absorbent, and are also the main form of amine escape. In order to avoid the economic loss and environmental pollution caused by amine escape, the recovery tower used for purifying flue gas is being improved in the prior art, such as by adding a spray device and a water washing device to remove the above-mentioned escaped amines in the flue gas as much as possible.

[0004] However, conventional water washing methods are unable to fully recover the escaped amines. After water washing, the amine concentration in the flue gas is still higher than 50ppm, which is much higher than the emission standard (the factory boundary limit standard in my country is 5mg / m3). Summary of the invention

[0005] The main purpose of the present invention is to provide a solution recovery device to solve the problem that the recovery effect of the solution recovery device used for recovering amine in the prior art is poor.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a solution recovery device, comprising: a shell, having a recovery chamber, an air inlet and an air outlet, the air inlet is connected with the air outlet through the recovery chamber, and the air inlet is located below the air outlet; a washing structure, arranged in the recovery chamber and located between the air inlet and the air outlet, the washing structure having an air inlet, a washing chamber and an air outlet, the air inlet is connected with the air outlet through the washing chamber, the air outlet is connected with the air outlet, the washing chamber is used to contain washing liquid, and the gas entering the washing chamber from the air inlet is discharged from the air outlet after being washed by the washing liquid; a guide structure, arranged in the recovery chamber and located between the washing structure and the air inlet, there are multiple guide structures, the multiple guide structures are arranged at intervals along a preset direction, and a guide channel is formed around the guide structure and at least part of the cavity wall of the recovery chamber; and / or, a guide channel is formed around two adjacent guide structures; wherein the air inlet is connected with the air inlet through the guide channel, and the guide channel is arranged in a zigzag shape; or, the guide channel is arranged in a wavy shape.

[0007] Furthermore, there are at least two washing structures, and the at least two washing structures are arranged at intervals along the height direction of the shell. The washing chambers of the at least two washing structures contain different types of washing liquids.

[0008] Furthermore, at least two washing structures include a first washing structure and a second washing structure, the first washing structure is located below the second washing structure, and the solution recovery device also includes: a first connecting structure, which is arranged at the air inlet of the first washing structure, and the first washing chamber of the first washing structure is connected with the recovery chamber through the first connecting structure, and the first connecting structure has an air collecting part and a connecting part, at least part of the connecting part is located in the first washing chamber, and the air collecting part is located outside the first washing chamber; wherein, along the direction from the air outlet to the air inlet, the inner diameter of the air collecting part gradually increases to form a conical structure, and the end of the air collecting part away from the first washing structure is in contact with the cavity wall of the recovery chamber.

[0009] Furthermore, the connecting portion is tubular and includes a first tubular structure, a second tubular structure and a third tubular structure that are interconnected. The first tubular structure is connected to the third tubular structure through the second tubular structure, and one end of the first tubular structure away from the second tubular structure is connected to the conical structure, and one end of the third tubular structure away from the second tubular structure is located below the liquid level of the washing liquid in the first washing chamber; wherein the second tubular structure is located above the liquid level of the washing liquid in the first washing chamber.

[0010] Furthermore, the solution recovery device also includes: a stirring member rotatably disposed in the second washing chamber of the second washing structure; a driving device drivingly connected to the stirring member, and the driving device drives the stirring member to rotate to stir the washing liquid in the second washing chamber.

[0011] Furthermore, the solution recovery device also includes a second connecting structure for connecting the first washing structure and the second washing structure, the second connecting structure includes a first pipe segment, a second pipe segment and a third pipe segment that are connected to each other, the second pipe segment is located between the first pipe segment and the third pipe segment, one end of the first pipe segment away from the third pipe segment is connected to the first washing chamber of the first washing structure, and one end of the third pipe segment away from the first pipe segment is located in the washing liquid of the second washing structure; wherein the second pipe segment is penetrated through the second washing structure, and the second pipe segment is located above the liquid level of the washing liquid of the second washing structure.

[0012] Further, along the gas flow direction in the second connecting structure, the inner diameter of at least part of the first pipe section gradually decreases to form a reduced diameter section.

[0013] Furthermore, the guide structure is a wavy plate, and two adjacent guide structures are arranged around each other with their plate surfaces facing each other to form a guide channel; wherein, in one guide structure, there is a first angle A between its two adjacent bending sections, and the first angle A satisfies: 60°≤A≤90°.

[0014] Further, there is a height difference H between the lower end surface of the guide structure and the air inlet portion, and the height difference H satisfies: 40cm≤H≤100cm.

[0015] Furthermore, the shell also has a liquid outlet connected to the recovery chamber, and the liquid outlet is arranged 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 a side away from the recovery chamber.

[0016] According to the technical solution of the present invention, the housing of the solution recovery device has a recovery chamber, an air inlet and an air outlet, the air inlet is connected to the air outlet through the recovery chamber, the air inlet is located below the air outlet, the washing structure is arranged in the recovery chamber and is located between the air inlet and the air outlet, the washing structure has an air inlet, a washing chamber and an air outlet, the air inlet is connected to the air outlet through the washing chamber, the air outlet is connected to the air outlet, the washing chamber is used to contain washing liquid, the gas entering the washing chamber from the air inlet is discharged from the air outlet after being washed by the washing liquid, the guide structure is arranged in the recovery chamber and is located between the washing structure and the air inlet, there are multiple guide structures, the multiple guide structures are arranged at intervals along a preset direction, and a guide channel is formed around the guide structure and at least part of the cavity wall of the recovery chamber; and / or, a guide channel is formed around two adjacent guide structures. Wherein, the air inlet is connected to the air inlet through the guide channel, the guide channel is arranged in a broken line shape; or, the guide channel is arranged in a wave shape. In this way, after the flue gas enters the recovery chamber through the air inlet, it must first flow into the guide channel. Since the guide channel is arranged in a broken line or wave shape, the amine droplets entrained in the flue gas can collide with the inner wall of the guide channel, and the larger amine droplets will directly adhere to the inner wall of the guide channel and flow down, and the smaller amine droplets will merge with each other and form larger amine droplets, that is, the flue gas will complete the primary recovery of amine in the guide channel, and the flue gas with greatly reduced amine content after recovery will flow into the washing chamber of the washing structure through the air inlet and perform secondary recovery of amine under the washing of the washing liquid, further reducing the amine content in the flue gas, thereby solving the problem of poor recovery effect of the solution recovery device for recovering amine in the prior art. At the same time, the recovered amine can be reused for a second time, thereby reducing the recovery cost of carbon dioxide. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 The overall structural schematic diagram of an embodiment of a solution recovery device according to the present invention is shown.

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

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

[0021] 20. Washing structure; 21. Air inlet; 22. Washing chamber; 23. Air outlet;

[0022] 30. Guide structure; 31. Guide channel;

[0023] 40. first connecting structure; 41. gas collecting part; 42. connecting part; 421. first tubular structure; 422. second tubular structure; 423. third tubular structure;

[0024] 50. stirring element;

[0025] 60. Driving device;

[0026] 70. Second connecting structure; 71. First pipe section; 711. Reduced diameter section; 72. Second pipe section; 73. Third pipe section. DETAILED DESCRIPTION

[0027] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0028] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0029] In the present invention, unless otherwise specified, the directional words used, such as "up" and "down", usually refer to the directions shown in the drawings, or to the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention.

[0030] In order to solve the problem that the solution recovery device for recovering amine in the prior art has a poor recovery effect, the present application provides a solution recovery device.

[0031] like Figure 1As shown, the solution recovery device includes a housing 10, a washing structure 20, i.e., a guide structure 30. 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. The washing structure 20 is arranged in the recovery chamber 11 and between the air inlet 12 and the air outlet 13. The washing structure 20 has an air inlet 21, a washing chamber 22, and an air outlet 23. The air inlet 21 is connected to the air outlet 23 through the washing chamber 22, and the air outlet 23 is connected to the air outlet 13. The washing chamber 22 is used to contain washing liquid. The gas entering the washing chamber 22 from the air inlet 21 is washed by the washing liquid and then discharged from the air outlet 23. The guide structure 30 is arranged in the recovery chamber 11 and between the washing structure 20 and the air inlet 21. There are multiple guide structures 30, and the multiple guide structures 30 are arranged at intervals along a preset direction. A guide channel 31 is formed around the guide structure 30 and at least part of the cavity wall of the recovery chamber 11; and / or, a guide channel 31 is formed around two adjacent guide structures 30. The air inlet 12 is connected to the air inlet 21 through the guide channel 31, and the guide channel 31 is arranged in a folded line shape; or, the guide channel 31 is arranged in a wave shape.

[0032] The technical solution of this embodiment is applied, and the housing 10 of the solution recovery device 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, the air inlet 12 is located below the air outlet 13, the washing structure 20 is arranged in the recovery chamber 11 and is located between the air inlet 12 and the air outlet 13, the washing structure 20 has an air inlet 21, a washing chamber 22 and an air outlet 23, the air inlet 21 is connected to the air outlet 23 through the washing chamber 22, and the air outlet 23 is connected to the air outlet 13. The washing chamber 22 is used to contain washing liquid. The gas entering the washing chamber 22 from the air inlet 21 is washed by the washing liquid and then discharged from the air outlet 23. The guide structure 30 is arranged in the recovery chamber 11 and is located between the washing structure 20 and the air inlet 12. There are multiple guide structures 30, and the multiple guide structures 30 are arranged at intervals along a preset direction. A guide channel 31 is formed around the guide structure 30 and at least part of the cavity wall of the recovery chamber 11; and / or, a guide channel 31 is formed around two adjacent guide structures 30. The air inlet 12 is connected to the air inlet 21 through the guide channel 31, and the guide channel 31 is arranged in a folded line shape; or, the guide channel 31 is arranged in a wave shape. In this way, after the flue gas enters the recovery chamber 11 through the air inlet 12, it needs to flow into the guide channel 31 first. Since the guide channel 31 is arranged in a broken line or wave shape, the amine droplets entrained in the flue gas can collide with the inner wall of the guide channel 31, and the larger amine droplets will directly adhere to the inner wall of the guide channel 31 and flow down, and the smaller amine droplets will merge with each other and form larger amine droplets, that is, the flue gas will complete the primary recovery of amine in the guide channel 31, and the flue gas with greatly reduced amine content after recovery will flow into the washing chamber 22 of the washing structure 20 through the air inlet 21 and perform the secondary recovery of amine under the washing of the washing liquid, further reducing the amine content in the flue gas, thereby solving the problem of poor recovery effect of the solution recovery device for recovering amine in the prior art. At the same time, the recovered amine can be reused for a second time, thereby reducing the recovery cost of carbon dioxide.

[0033] Optionally, the shell 10 is a cylindrical structure with a polygonal cross section, and the preset direction is the length direction or the width direction of the shell 10 .

[0034] Optionally, the shell 10 is a cylindrical structure with a circular cross-section, and the preset direction is the radial direction of the shell 10 .

[0035] In this embodiment, the washing structure 20 is actually arranged at the top of the recovery chamber 11, so that the staff can climb to the top of the shell 10 and inspect the washing structure 20 or add washing liquid into the washing structure 20 through the inspection port arranged at the top of the shell 10.

[0036] Specifically, since the air inlet 12 is located below the air outlet 13, the high-temperature flue gas flowing into the recovery chamber 11 through the air inlet 12 can spontaneously flow to the air outlet 13, further reducing the operating cost of the solution recovery device.

[0037] Optionally, there are at least two washing structures 20, and at least two washing structures 20 are arranged at intervals along the height direction of the housing 10, and the washing liquids contained in the washing chambers 22 of at least two washing structures 20 are of different types. In this way, the above arrangement can, on the one hand, wash the flue gas multiple times through multiple washing structures 20, further reducing the amine content in the flue gas; on the other hand, due to the different types of washing liquids in the multiple washing structures 20, the amine recovery amount of multiple washings can be further increased, thereby comprehensively improving the recovery reliability of the solution recovery device.

[0038] In this embodiment, there are two washing structures 20 , and the two washing structures 20 are arranged at intervals along the height direction of the housing 10 .

[0039] It should be noted that the number of the washing structures 20 is not limited thereto, and can be adjusted according to working conditions and usage requirements. Optionally, the number of the washing structures 20 is three, four, five, six, or more.

[0040] Optionally, the washing liquid can be water or an acidic solution. Specifically, in the actual washing process, the flue gas can be initially washed with water to remove a large amount of impurities in the flue gas while recovering part of the amines. In the subsequent secondary washing process, an acidic solution can be used for washing to specifically remove the amines in the flue gas. At the same time, compared with the acidic solution washing liquid, the price of water is cheaper. Considering that there are many impurities in the flue gas, if the acidic solution is directly used for washing, the consumption of the acidic solution is very large, and there is a possibility that it will be contaminated by impurities in the flue gas and become unusable. Therefore, a combination of water washing and acidic solution washing is adopted to reduce the cost of amine recovery while ensuring that most of the amines in the flue gas can be recovered to the greatest extent.

[0041] like Figure 1As shown, at least two washing structures 20 include a first washing structure and a second washing structure, the first washing structure is located below the second washing structure, and the solution recovery device also includes a first connecting structure 40, the first connecting structure 40 is arranged at the air inlet 21 of the first washing structure, the first washing chamber of the first washing structure is connected with the recovery chamber 11 through the first connecting structure 40, the first connecting structure 40 has a gas collecting part 41 and a connecting part 42, at least part of the connecting part 42 is located in the first washing chamber, and the gas collecting part 41 is located outside the first washing chamber. Among them, along the direction from the air outlet 13 to the air inlet 12, the inner diameter of the gas collecting part 41 gradually increases to form a conical structure, and the end of the gas collecting part 41 away from the first washing structure contacts the cavity wall of the recovery chamber 11. In this way, the gas collecting part 41 can fully collect the flue gas flowing out through the guide channel 31, on the one hand, ensuring that all the flue gas can flow into the washing structure 20; on the other hand, during the flow of the flue gas, as the inner diameter of the gas collecting part 41 gradually decreases, the flue gas flow rate gradually increases, thereby increasing the flow rate of the flue gas when it flows into the washing chamber 22, ensuring that the collision between the flue gas and the washing liquid is more intense. At the same time, because the end of the gas collecting part 41 away from the first washing structure contacts the cavity wall of the recovery cavity 11, the flue gas cannot flow from the gap between the two into the relatively closed space formed by the two.

[0042] In this embodiment, the conical gas collecting portion 41 is actually a gas collecting hood.

[0043] like Figure 1 As shown, the connecting portion 42 is tubular and includes a first tubular structure 421, a second tubular structure 422 and a third tubular structure 423 that are interconnected. The first tubular structure 421 is connected to the third tubular structure 423 through the second tubular structure 422. The end of the first tubular structure 421 away from the second tubular structure 422 is connected to the conical structure, and the end of the third tubular structure 423 away from the second tubular structure 422 is located below the liquid level of the washing liquid in the first washing chamber. Among them, the second tubular structure 422 is located above the liquid level of the washing liquid in the first washing chamber. In this way, the above-mentioned setting of the connecting portion 42 actually forms a U-shaped tube structure while ensuring that the smoke can flow into the washing chamber 22 to prevent the washing liquid in the washing chamber 22 from flowing back into the recovery chamber 11, thereby improving the washing reliability of the washing structure 20.

[0044] like Figure 1As shown, the solution recovery device also includes a stirring member 50 and a driving device 60. The stirring member 50 is rotatably arranged in the second washing chamber of the second washing structure. The driving device 60 is connected to the stirring member 50, and the driving device 60 drives the stirring member 50 to rotate to stir the washing liquid in the second washing chamber. In this way, since the amine content in the flue gas after washing by the first washing structure is already low, the driving device 60 drives the stirring member 50 to rotate, which can further increase the intensity of the collision between the flue gas and the washing liquid, thereby allowing the amine in the flue gas to be recovered more thoroughly.

[0045] Optionally, the stirring member 50 is an impeller.

[0046] Optionally, the driving device 60 is a servo motor.

[0047] like Figure 1 As shown, the solution recovery device also includes a second connecting structure 70 for connecting the first washing structure and the second washing structure. The second connecting structure 70 includes a first pipe segment 71, a second pipe segment 72 and a third pipe segment 73 that are interconnected. The second pipe segment 72 is located between the first pipe segment 71 and the third pipe segment 73. The end of the first pipe segment 71 away from the third pipe segment 73 is connected to the first washing chamber of the first washing structure, and the end of the third pipe segment 73 away from the first pipe segment 71 is located in the washing liquid of the second washing structure. Among them, the second pipe segment 72 is penetrated on the second washing structure, and the second pipe segment 72 is located above the liquid level of the washing liquid of the second washing structure. In this way, the second connecting structure 70 can form a U-shaped pipe structure while realizing the connection between the first washing structure and the second washing structure to avoid the backflow of the washing liquid in the second washing structure, thereby improving the washing reliability of the second washing structure.

[0048] Optionally, the solution recovery device further includes a control module and a detection device, the detection device is arranged in the second pipe section 72 for detecting the amine content in the flue gas in the second pipe section 72, the control module is connected to both the detection device and the drive device 60, when the detection device detects that the amine content in the second pipe section 72 is greater than or equal to the first preset value, the control module controls the drive device 60 to operate, so as to stir the washing liquid in the second washing structure to form a vortex, thereby fully recovering the amine in the flue gas. In this way, the above arrangement can further reduce the operating cost of the solution recovery device.

[0049] like Figure 1 As shown, along the gas flow direction in the second connecting structure 70, the inner diameter of at least part of the first pipe section 71 gradually decreases to form a reduced diameter section 711. In this way, the reduced diameter section 711 can further increase the flow rate of the flue gas, thereby increasing the intensity of the collision between the flue gas and the washing liquid in the second washing structure.

[0050] Optionally, the guide structure 30 is a wavy plate, and the plate surfaces of two adjacent guide structures 30 facing each other surround each other to form a guide channel 31. Among them, in a guide structure 30, there is a first angle A between its two adjacent bending sections, and the first angle A satisfies: 60°≤A≤90°. In this way, the above-mentioned setting makes the structure of the guide structure 30 simpler, easier to process and realize, and on the other hand, makes the value of the first angle A between the two adjacent bending sections more appropriate, so as to ensure that the flue gas can collide with the inner wall of the guide channel 31 sufficiently when flowing through the guide channel 31, thereby ensuring that the primary recovery of the solution recovery device is more reliable and thorough.

[0051] Optionally, there is a height difference H between the lower end surface of the guide structure 30 and the air inlet 12, and the height difference H satisfies: 40cm≤H≤100cm. In this way, the above arrangement ensures that the flue gas flowing into the guide channel 31 has a sufficiently large flow rate to increase the intensity of the collision between the flue gas and the inner wall of the guide channel 31, and further increase the amine recovery amount in the primary recovery process of the flue gas.

[0052] Specifically, the air intake portion 12 is actually an air intake pipe, and an extension direction of the air intake pipe forms a second angle B with an extension direction of the guide channel 31 , and the second angle B is 90°.

[0053] Specifically, during the rising process of the smoke in the recovery chamber 11 (i.e., during the process of flowing from the air inlet 12 to the air outlet 13), the air pressure and the flow rate gradually decrease. The height difference between the lower end surface of the guide structure 30 and the air inlet 12 is actually formed by the guide structure 30 and the cavity wall of the recovery chamber 11 to form an airflow buffer cavity of a relatively suitable volume. The smoke will first fill the airflow buffer cavity due to the setting of the flow direction, and because the air inlet 12 is the smoke inlet end, the pressure in the airflow buffer cavity is relatively high, and the airflow velocity flowing into the guide channel 31 is relatively high, so that a sufficiently intense collision can occur between the inner wall of the guide channel 31.

[0054] In this embodiment, the housing 10 further has a liquid outlet 14 in communication 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, and the arc-shaped surface protrudes toward a side away from the recovery chamber 11. In this way, the amine solution on the bottom wall of the flow recovery chamber 11 can spontaneously flow toward the liquid outlet 14, and then flow into the subsequent recovery structure to achieve the reuse of the amine.

[0055] Specifically, the liquid outlet 14 is a tubular structure and is disposed at the center of the bottom wall of the recovery chamber 11 .

[0056] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0057] The shell of the solution recovery device has a recovery chamber, an air inlet and an air outlet. The air inlet is connected to the air outlet through the recovery chamber, and the air inlet is located below the air outlet. The washing structure is arranged in the recovery chamber and is located between the air inlet and the air outlet. The washing structure has an air inlet, a washing chamber and an air outlet. The air inlet is connected to the air outlet through the washing chamber, and the air outlet is connected to the air outlet. The washing chamber is used to contain washing liquid. The gas entering the washing chamber from the air inlet is washed by the washing liquid and then discharged from the air outlet. The guide structure is arranged in the recovery chamber and is located between the washing structure and the air inlet. There are multiple guide structures, and the multiple guide structures are arranged at intervals along a preset direction. A guide channel is formed around the guide structure and at least part of the cavity wall of the recovery chamber; and / or a guide channel is formed around two adjacent guide structures. Wherein, the air inlet is connected to the air inlet through the guide channel, and the guide channel is arranged in a broken line shape; or, the guide channel is arranged in a wave shape. In this way, after the flue gas enters the recovery chamber through the air inlet, it must first flow into the guide channel. Since the guide channel is arranged in a broken line or wave shape, the amine droplets entrained in the flue gas can collide with the inner wall of the guide channel, and the larger amine droplets will directly adhere to the inner wall of the guide channel and flow down, and the smaller amine droplets will merge with each other and form larger amine droplets, that is, the flue gas will complete the primary recovery of amine in the guide channel, and the flue gas with greatly reduced amine content after recovery will flow into the washing chamber of the washing structure through the air inlet and perform secondary recovery of amine under the washing of the washing liquid, further reducing the amine content in the flue gas, thereby solving the problem of poor recovery effect of the solution recovery device for recovering amine in the prior art. At the same time, the recovered amine can be reused for a second time, thereby reducing the recovery cost of carbon dioxide.

[0058] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0059] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0060] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A solution recovery device, characterized in that: include: The housing (10) comprises a recovery chamber (11), an air inlet (12) and an air outlet (13), wherein 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 washing structure (20) is arranged in the recovery chamber (11) and between the air inlet (12) and the air outlet (13); the washing structure (20) comprises an air inlet (21), a washing chamber (22) and an air outlet (23); the air inlet (21) is connected to the air outlet (23) through the washing chamber (22); the air outlet (23) is connected to the air outlet (13); the washing chamber (22) is used to contain washing liquid; the gas entering the washing chamber (22) from the air inlet (21) is washed by the washing liquid and then discharged from the air outlet (23); A guide structure (30) is arranged in the recovery chamber (11) and between the washing structure (20) and the air inlet (12); the guide structure (30) is multiple, and the multiple guide structures (30) are arranged at intervals along a preset direction; a guide channel (31) is formed between the guide structure (30) and at least part of the cavity wall of the recovery chamber (11); and / or the guide channel (31) is formed between two adjacent guide structures (30); Wherein, the air inlet portion (12) is connected to the air inlet (21) through the guide channel (31), and the guide channel (31) is arranged in a folded line shape; or, the guide channel (31) is arranged in a wave shape.

2. The solution recovery device according to claim 1, characterized in that: There are at least two washing structures (20), and at least two of the washing structures (20) are arranged at intervals along the height direction of the shell (10). The washing liquids contained in the washing chambers (22) of at least two of the washing structures (20) are of different types.

3. The solution recovery device according to claim 2, characterized in that: The at least two washing structures (20) include a first washing structure and a second washing structure, wherein the first washing structure is located below the second washing structure, and the solution recovery device further includes: a first connecting structure (40) arranged at the air inlet (21) of the first washing structure, wherein the first washing chamber of the first washing structure is connected with the recovery chamber (11) via the first connecting structure (40), the first connecting structure (40) comprising an air collecting portion (41) and a connecting portion (42), at least a portion of the connecting portion (42) being located in the first washing chamber, and the air collecting portion (41) being located outside the first washing chamber; In which, along the direction from the air outlet (13) to the air inlet (12), the inner diameter of the air collecting section (41) gradually increases to form a conical structure, and the end of the air collecting section (41) away from the first washing structure is in contact with the cavity wall of the recovery cavity (11).

4. The solution recovery device according to claim 3, characterized in that: The connecting portion (42) is tubular and comprises a first tubular structure (421), a second tubular structure (422) and a third tubular structure (423) which are interconnected; the first tubular structure (421) is connected to the third tubular structure (423) via the second tubular structure (422); an end of the first tubular structure (421) away from the second tubular structure (422) is connected to the cone structure; an end of the third tubular structure (423) away from the second tubular structure (422) is located below the liquid level of the washing liquid in the first washing chamber; Wherein, the second tubular structure (422) is located above the liquid level of the washing liquid in the first washing chamber.

5. The solution recovery device according to claim 3, characterized in that: The solution recovery device also includes: a stirring member (50) rotatably disposed in the second washing chamber of the second washing structure; The driving device (60) is drivingly connected to the stirring member (50), and the driving device (60) drives the stirring member (50) to rotate so as to stir the washing liquid in the second washing chamber.

6. The solution recovery device according to claim 3, characterized in that: The solution recovery device further comprises a second connecting structure (70) for connecting the first washing structure and the second washing structure, the second connecting structure (70) comprising a first pipe section (71), a second pipe section (72) and a third pipe section (73) which are connected to each other, the second pipe section (72) being located between the first pipe section (71) and the third pipe section (73), one end of the first pipe section (71) away from the third pipe section (73) being connected to the first washing chamber of the first washing structure, and one end of the third pipe section (73) away from the first pipe section (71) being located in the washing liquid of the second washing structure; Wherein, the second pipe section (72) is passed through the second washing structure, and the second pipe section (72) is located above the liquid level of the washing liquid in the second washing structure.

7. The solution recovery device according to claim 6, characterized in that: Along the gas flow direction in the second connecting structure (70), the inner diameter of at least part of the first pipe section (71) gradually decreases to form a reduced diameter section (711).

8. The solution recovery device according to claim 1, characterized in that: The guide structure (30) is a corrugated plate, and the plate surfaces of two adjacent guide structures (30) facing each other surround each other to form the guide channel (31); Wherein, in one of the guide structures (30), a first angle A is provided between two adjacent bending sections, and the first angle A satisfies: 60°≤A≤90°.

9. The solution recovery device according to claim 8, characterized in that: There is a height difference H between the lower end surface of the guide structure (30) and the air inlet portion (12), and the height difference H satisfies: 40cm≤H≤100cm.

10. The solution recovery device according to claim 1, characterized in that: The housing (10) further comprises a liquid outlet (14) which is in communication with the recovery chamber (11); the liquid outlet (14) is arranged on the bottom wall of the recovery chamber (11); Wherein, the bottom wall of the recovery chamber (11) is an arc-shaped surface, and the arc-shaped surface is convex toward a side away from the recovery chamber (11).

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