Absorption tower having absorbent phase separation function

Abstract

An absorption tower (100) having an absorbent phase separation function. The absorption tower (100) having an absorbent phase separation function comprises a tower body (1), a liquid collection assembly (2), a first flow stabilization assembly (3), a rich-phase solution outlet (13) and a lean-phase solution outlet (14), wherein the tower body (1) has an absorption cavity (11) and a phase separation cavity (12) which are sequentially arranged from top to bottom; the liquid collection assembly (2) is located at the top of the phase separation cavity (12), and is configured to collect an absorbent falling from the absorption cavity (11) and convey same to the middle of the phase separation cavity (12); the first flow stabilization assembly (3) comprises a first flow stabilization member (31) and a second flow stabilization member (32), the first flow stabilization member (31) and the second flow stabilization member (32) being arranged vertically opposite each other so as to guide the absorbent entering the phase separation cavity (12) to diffuse in a horizontal direction; and the rich-phase solution outlet (13) is configured to pump out a rich-phase solution located in the phase separation cavity (12), and the lean-phase solution outlet (14) is configured to pump out a lean-phase solution in the phase separation cavity (12).

Description

Absorption tower with absorbent phase separation function

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese Patent Application No. 2024109968030, filed in China on July 24, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure belongs to the field of carbon capture technology, specifically relating to an absorption tower with absorbent phase separation function. Background Technology

[0004] In carbon capture systems, traditional organic alcohol amine chemical absorption methods have high regeneration energy consumption and operating costs. One of the main reasons is that in existing carbon dioxide capture processes, the rich liquid after the absorbent is loaded with carbon dioxide needs to be sent to a regeneration tower for heating and regeneration. However, since the proportion of water in the absorbent is high (generally more than 70%), the heating and volatilization of water during the high-temperature desorption of carbon dioxide will consume a large amount of energy (about more than 50%).

[0005] In related technologies, in phase change carbon dioxide capture technology, the rich liquid formed after the phase change absorbent absorbs carbon dioxide can be automatically concentrated and pretreated before entering the regeneration tower, separating into a carbon dioxide-rich phase solution and a carbon dioxide-lean phase solution. By desorbing the carbon dioxide-rich phase solution, the total liquid volume entering the regeneration tower is reduced, which can significantly reduce regeneration heat consumption and capture costs. However, the phase separator is set up separately, which occupies a large area and is not conducive to site planning and equipment layout. The rich liquid needs to circulate between the absorption tower and the phase separator, consuming energy. When the phase separator is placed inside the absorption tower, the solution disturbance intensity in the phase separation chamber is large, which is not conducive to the separation of the rich phase solution and the lean phase solution in the phase separation chamber. Summary of the Invention

[0006] The embodiments disclosed herein are intended to at least partially address one of the technical problems in the related art.

[0007] Therefore, embodiments of this disclosure propose an absorption tower with absorbent phase separation function, which reduces the equipment footprint, reduces the disturbance intensity of the solution in the phase separation chamber, improves the separation effect of rich and poor phases, reduces the amount of rich liquid entering the regeneration stage, and reduces energy consumption.

[0008] An absorption tower with absorbent phase separation function according to an embodiment of this disclosure includes:

[0009] The tower body has an absorption cavity and a phase separation cavity arranged sequentially from top to bottom;

[0010] A liquid collection assembly is located at the top of the phase separation chamber. The liquid collection assembly has a first drain port located in the middle of the phase separation chamber. The liquid collection assembly is used to collect the absorbent falling from the absorption chamber and transport it to the middle of the phase separation chamber.

[0011] The first flow stabilizing component is located in the middle of the phase separation cavity. The first flow stabilizing component includes a first flow stabilizing element and a second flow stabilizing element. The first flow stabilizing element is located below the first drain port, and the second flow stabilizing element is located above the first drain port. The first flow stabilizing element and the second flow stabilizing element are arranged opposite each other to guide the absorbent entering the phase separation cavity to diffuse in the horizontal direction.

[0012] The rich phase solution outlet and the lean phase solution outlet are located on the side wall of the tower body and communicate with the phase separation chamber. The rich phase solution outlet is located below the first flow stabilizing component to pump out the rich phase solution located in the phase separation chamber, and the lean phase solution outlet is located above the first flow stabilizing component to pump out the lean phase solution located in the phase separation chamber.

[0013] The absorption tower of this embodiment integrates a phase separation function, reducing the floor space required for a separate phase separator. It allows the rich liquid after carbon dioxide absorption to directly separate within the phase separation chamber, enabling the separated rich phase solution to flow to the regeneration stage for regeneration. This allows the separated lean phase solution to be directly reused, avoiding the need for the rich liquid to be transferred between the absorption tower and the phase separator, thus reducing energy consumption. Furthermore, the liquid collection assembly in this embodiment allows the collected rich liquid to be directly transported to the center of the phase separation chamber. The first and second flow stabilizers of the first flow stabilizing assembly stabilize the flow of the rich liquid into the phase separation chamber, preventing significant vertical disturbances. This allows the rich liquid entering the phase separation chamber to diffuse horizontally in the center and gradually separate into phases and layers, thereby reducing the proportion of the rich phase solution and lowering energy consumption in the regeneration stage.

[0014] In some embodiments, the liquid collection assembly includes a first plate and a first pipe connected to each other. The circumferential edge of the first plate is connected to the inner wall of the tower body and a liquid collection cavity is formed above the first plate. One end of the first pipe is connected to the liquid collection cavity, and the other end of the first pipe is a first drain port. The absorbent in the liquid collection cavity flows into the phase separation cavity along the first pipe.

[0015] In this embodiment, the first plate can separate the absorption chamber and the phase separation chamber, preventing the rich liquid falling from the absorption chamber from directly landing on the surface of the solution in the phase separation chamber, which would lead to a decrease in the quality of the separated lean phase solution. In addition, the solution in the phase separation chamber is divided into lean phase solution, mixed solution and rich phase solution in the vertical direction. In this embodiment, the first tube can guide the rich liquid in the collection chamber to flow to the middle of the phase separation chamber, so that the rich liquid diffuses in the middle region of the phase separation chamber (the region where the mixed solution is located), reducing the disturbance to the regions where the lean phase solution is located and the regions where the rich phase solution is located, and improving the phase separation effect and efficiency.

[0016] In some embodiments, there are multiple first tubes, which are arranged in parallel and spaced apart in the phase separation cavity, and each first tube is provided with a first flow stabilizing component at its first drain port.

[0017] In this embodiment, the phase separation cavity has a large cross-sectional size. By arranging multiple first tubes, the liquid flow rate of a single first tube can be reduced, thereby reducing the disturbance intensity of the solution at the corresponding position. This allows the rich liquid in the collection cavity to be dispersed at different positions in the middle region of the phase separation cavity through multiple first tubes, improving the stability of the phase separation and stratification of the solution in the phase separation cavity.

[0018] In some embodiments, the first flow stabilizer includes a second plate, the middle portion of which corresponds to the first drain port, and the circumferential edge of the second plate extends away from the first pipe and is inclined upward.

[0019] In this embodiment, the second plate blocks and guides the rich liquid entering the phase separation chamber through the first drain port, reducing the disturbance intensity to the solution below the second plate. At the same time, it guides the rich liquid away from the first pipe and causes the rich liquid to flow upward at an angle. The second flow stabilizer further guides the rich liquid, reducing the disturbance intensity to the solution above the second flow stabilizer. This allows the rich liquid to diffuse in a roughly horizontal direction between the first and second flow stabilizers, thereby improving the phase separation effect and efficiency.

[0020] In some embodiments, the second current stabilizer includes a third plate, which is disposed opposite to the second plate in the vertical direction. The third plate is sleeved on the first tube, and the circumferential edge of the third plate extends away from the first tube. The distance between the circumferential edge of the third plate and the first tube in the horizontal direction is greater than the distance between the circumferential edge of the second plate and the first tube in the horizontal direction.

[0021] In this embodiment, the third plate further guides and stabilizes the flow of the rich liquid after it has been guided and redirected by the second plate, reducing the kinetic energy of the rich liquid and allowing the rich liquid between the second and third plates to gradually stabilize and diffuse in a generally horizontal direction.

[0022] In some embodiments, the third plate has a first annular section, a second annular section, and a third annular section arranged sequentially in a direction away from the first tube. The first annular section is inclined upward from the side closer to the first tube to the side away from the first tube, and the third annular section is inclined downward from the side closer to the first tube to the side away from the first tube.

[0023] In this embodiment, the third plate is designed in segments. The first annular segment reduces the flow resistance of the rich liquid, allowing the rich liquid flowing into the phase separation cavity to spread horizontally as quickly as possible. The second annular segment smoothly transitions between the first and third annular segments, guiding the rich liquid downwards. At this time, the kinetic energy of the rich liquid in the vertical direction is reduced, and the rich liquid can spread as much as possible in the middle region of the phase separation cavity when it spreads horizontally. This promotes a steady rise in the overall liquid level in the middle region, which can reduce the disturbance to the upper lean phase solution in the phase separation cavity and prevent the upper lean phase solution in the phase separation cavity from boiling.

[0024] In some embodiments, the second plate has a plurality of first diversion channels, the plurality of first diversion channels are arranged circumferentially spaced along the second plate, the first diversion channels extend in a direction away from the first pipe, and the cross-sectional dimensions of the first diversion channels gradually increase from the end closer to the first pipe to the end away from the first pipe.

[0025] And / or, the third plate has a plurality of second diversion channels, the plurality of second diversion channels are arranged at circumferential intervals along the third plate, the second diversion channels extend in a direction away from the first pipe, and the cross-sectional dimensions of the second diversion channels gradually increase from the end closer to the first pipe to the end away from the first pipe.

[0026] And / or, the first current stabilizing component further includes a first frame, the first frame being connected to the tower body, and the first current stabilizing element and the second current stabilizing element being connected to the first frame;

[0027] And / or, the second plate is hemispherical or frustum-shaped;

[0028] And / or, it also includes an overflow trough, which is disposed on the side wall of the phase separation cavity and located above the first flow stabilizing component. The lean phase solution outlet is connected to the overflow trough, and the lean phase solution in the phase separation cavity overflows into the overflow trough and is discharged through the lean phase solution outlet.

[0029] The first and second diversion channels on the second and third plates in this embodiment can divert the rich liquid between the second and third plates, allowing some of the rich liquid to flow out through the first and second diversion channels. In addition, during the flow of the rich liquid between the second and third plates, the solution with a richer phase can flow down to the second plate through the first diversion channel, and the solution with a poorer phase can flow up to the third plate through the second diversion channel. In this embodiment, the rich liquid entering the phase separation cavity can diffuse and separate more quickly, reducing the amount of rich liquid after being guided by the third plate and improving the uniformity of the distribution of the rich liquid in the middle region of the phase separation cavity.

[0030] The overflow tank in this embodiment allows the lean phase solution to overflow into the overflow tank and then be pumped out, reducing the disturbance to the solution in the phase separation chamber during the pumping out of the lean phase solution and making the liquid level in the phase separation chamber more stable.

[0031] In some embodiments, a second current stabilizing component is further included, the second current stabilizing component comprising:

[0032] The fourth plate is disposed in the phase separation cavity and is located below the first current stabilizing component. The fourth plate divides the phase separation cavity into a first chamber located above the fourth plate and a second chamber located below the fourth plate. The rich phase solution outlet is connected to the second chamber.

[0033] Multiple second tubes are connected to the fourth plate. One end of each second tube is connected to the first chamber, and the other end of each second tube is a second drain outlet located inside the second chamber. The vertical height of the second drain outlet is lower than that of the rich phase solution outlet.

[0034] The second flow stabilizing component in this embodiment allows the rich phase solution to flow into the second chamber first and then be discharged from the rich phase solution outlet. At the same time, it makes the rich phase solution at the bottom of the first chamber, which is on the same horizontal plane, enter the second chamber more uniformly and consistently. This avoids large disturbances in the area close to the rich phase solution outlet due to the discharge of the rich phase solution, and also prevents the rich phase solution in the area far from the rich phase solution outlet from failing to converge to the rich phase solution outlet in time, thus affecting the uniformity of the distribution of the rich phase solution in the phase separation chamber and the discharge effect.

[0035] In some embodiments, the fourth plate is provided with a connecting hole for connecting the first chamber and the second chamber.

[0036] The connecting holes in this embodiment can connect the first chamber and the second chamber, preventing the rich phase solution from failing to fill the second chamber and improving the pumping effect. Furthermore, the main function of the connecting holes is not to allow the rich phase solution in the first chamber to flow into the second chamber through the connecting holes. Therefore, the number and diameter of the connecting holes should not be too large to avoid causing significant disturbance to the solution in the first chamber during the pumping of the rich phase solution due to the setting of the connecting holes.

[0037] In some embodiments, there is a gap between the circumferential edge of the fourth plate and the inner wall of the phase separation cavity;

[0038] Alternatively, the sum of the flow areas of the connecting holes on the fourth plate is less than 1 / 50 of the sum of the flow areas of all the second pipes.

[0039] Alternatively, the number of the connecting holes may be multiple, and the flow area of ​​the connecting holes may be proportional to the distance of the connecting holes from the outlet of the rich phase solution;

[0040] Alternatively, there may be multiple rich phase solution outlets, which are arranged at circumferential intervals along the phase separation cavity.

[0041] In this embodiment, a gap can be provided between the fourth plate and the inner wall of the phase separation chamber, allowing the second chamber to be filled with a rich-phase solution. In this embodiment, limiting the sum of the flow areas of the connecting holes on the fourth plate reduces disturbance to the solution in the first chamber. When multiple connecting holes are provided, constraining the flow areas of different connecting holes allows the rich-phase solution at the same horizontal plane in the first chamber to flow more uniformly downwards. This embodiment can also improve the pumping efficiency of the rich-phase solution by providing multiple rich-phase solution outlets, resulting in a more stable and consistent phase separation effect at different locations within the phase separation chamber. Attached Figure Description

[0042] Figure 1 is a schematic diagram of the structure of an absorption tower with absorbent phase separation function according to an embodiment of the present disclosure.

[0043] Figure 2 is a schematic diagram of the arrangement structure of the first current stabilizing component (with the first frame removed) and the second current stabilizing component according to an embodiment of the present disclosure.

[0044] Figure 3 is a schematic diagram of the structure of the first current stabilizing component according to an embodiment of the present disclosure.

[0045] Figure 4 is a schematic diagram of the structure of the second current stabilizing component according to an embodiment of the present disclosure.

[0046] Reference numerals: 100. Absorption tower with absorbent phase separation function; 1. Tower body; 11. Absorption chamber; 12. Phase separation chamber; 121. First chamber; 122. Second chamber; 13. Rich phase solution outlet; 14. Lean phase solution outlet; 2. Liquid collection assembly; 21. First plate; 22. First pipe; 23. Liquid collection chamber; 24. First drain outlet; 3. First flow stabilizing assembly; 31. First flow stabilizing element; 311. First diversion channel; 32. Second flow stabilizing element; 321. First annular section; 322. Second annular section; 323. Third annular section; 234. Second diversion channel; 33. First frame; 4. Overflow channel; 5. Second flow stabilizing assembly; 51. Fourth plate; 511. Connecting hole; 52. Second pipe; 521. Second drain outlet. Detailed Implementation

[0047] Embodiments of this disclosure are described in detail below, with examples of these embodiments illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this disclosure, and should not be construed as limiting it.

[0048] The absorption tower 100 with absorbent phase separation function according to an embodiment of the present disclosure will be described in detail below based on Figures 1-4.

[0049] As shown in Figures 1 and 2, the absorption tower 100 with absorbent phase separation function according to the embodiment of this disclosure includes a tower body 1, a liquid collection assembly 2, and a first flow stabilizing assembly 3. The tower body 1 has an absorption chamber 11 and a phase separation chamber 12 arranged sequentially from top to bottom. The absorbent used in the embodiment of this disclosure is a phase change absorbent. The absorbent enters the absorption chamber 11 from the top of the tower body 1 and comes into full contact with the flue gas in the packing layer in the absorption chamber 11, so that the absorbent absorbs carbon dioxide and forms a rich liquid.

[0050] The liquid collection assembly 2 is located at the top of the phase separation chamber 12. The liquid collection assembly 2 has a first drain port 24 located in the middle of the phase separation chamber 12. The liquid collection assembly 2 is used to collect the absorbent falling from the absorption chamber 11 and transport it to the middle of the phase separation chamber 12. The absorbent falling onto the liquid collection assembly 2 has absorbed carbon dioxide and formed a rich liquid. The rich liquid will be transported to the phase separation chamber 12 for phase separation, and the phase-separated rich phase solution will be sent to a subsequent regeneration tower for regeneration. The lean phase solution can be directly recycled.

[0051] It should be understood that the absorption tower of this embodiment integrates a phase separation function, which reduces the floor space occupied by the phase separator when it is arranged separately, and enables the rich liquid after absorbing carbon dioxide to be directly separated in the phase separation chamber 12, so that the rich phase solution after phase separation flows to the regeneration stage for regeneration, and the lean phase solution after phase separation can be directly reused, avoiding the rich liquid to be transferred between the absorption tower and the phase separator, thus reducing energy consumption.

[0052] The first flow stabilizing component 3 is located in the middle of the phase separation chamber 12. The first flow stabilizing component 3 includes a first flow stabilizing element 31 and a second flow stabilizing element 32. The first flow stabilizing element 31 is located below the first drain port 24, and the second flow stabilizing element 32 is located above the first drain port 24. The first flow stabilizing element 31 and the second flow stabilizing element 32 are arranged opposite each other to guide the absorbent entering the phase separation chamber 12 to diffuse in the horizontal direction.

[0053] The absorption tower of this embodiment further includes a rich phase solution outlet 13 and a lean phase solution outlet 14. The rich phase solution outlet 13 and the lean phase solution outlet 14 are disposed on the side wall of the tower body 1 and communicate with the phase separation chamber 12. The rich phase solution outlet 13 is disposed below the first flow stabilizing component 3 to pump out the rich phase solution located in the phase separation chamber 12, and the lean phase solution outlet 14 is disposed above the first flow stabilizing component 3 to pump out the lean phase solution located in the phase separation chamber 12.

[0054] In this embodiment, the liquid collection assembly 2 is configured to directly transport the rich liquid collected by the liquid collection assembly 2 to the middle of the phase separation chamber 12. The first flow stabilizer 31 and the second flow stabilizer 32 of the first flow stabilizing assembly 3 can stabilize the flow of the rich liquid flowing into the phase separation chamber 12, avoiding large disturbances in the vertical direction of the rich liquid in the phase separation chamber 12. This allows the rich liquid entering the phase separation chamber 12 to diffuse horizontally in the middle of the phase separation chamber 12 and gradually separate into phases and layers, thereby reducing the proportion of the rich phase solution and reducing the energy consumption in the regeneration stage.

[0055] As shown in Figures 1 and 2, in some embodiments, the liquid collection assembly 2 includes a first plate 21 and a first pipe 22 connected to each other. The circumferential edge of the first plate 21 is connected to the inner wall of the tower body 1, and a liquid collection cavity 23 is formed above the first plate 21. One end of the first pipe 22 is connected to the liquid collection cavity 23, and the other end of the first pipe 22 is a first drain port 24. The absorbent in the liquid collection cavity 23 flows into the phase separation cavity 12 along the first pipe 22.

[0056] It should be noted that the first plate 21 in this embodiment can separate the absorption chamber 11 and the phase separation chamber 12, preventing the rich liquid falling from the absorption chamber 11 from directly landing on the surface of the solution in the phase separation chamber 12, which would lead to a decrease in the quality of the separated lean phase solution. In addition, the solution in the phase separation chamber 12 consists of lean phase solution, mixed solution and rich phase solution in the vertical direction. In this embodiment, the first pipe 22 can guide the rich liquid in the collection chamber 23 to flow to the middle of the phase separation chamber 12, thereby allowing the rich liquid to diffuse in the middle region of the phase separation chamber 12 (the region where the mixed solution is located), reducing the disturbance to the region where the lean phase solution is located and the region where the rich phase solution is located, and improving the phase separation effect and efficiency.

[0057] As shown in Figures 1 and 2, in some embodiments, there are multiple first tubes 22, which are arranged in parallel and spaced apart in the phase separation cavity 12, and a first flow stabilizing component 3 is provided at the first drain port 24 of each first tube 22.

[0058] The number of first tubes 22 can be 2-20, specifically 2, 4, 5, 7, 10, 15, 18, or 20. The flow area of ​​a single first tube 22 and the number of first tubes 22 are determined based on the cross-sectional dimensions of the tower body 1 and the rich liquid flow rate.

[0059] In some embodiments, the inner cavity of the tower body 1 has a rectangular cross-section, and the cross-sections of the absorption cavity 11 and the phase separation cavity 12 are also rectangular. The length of the absorption cavity 11 and the phase separation cavity 12 can reach 16000mm and the width can reach 12000mm. At this time, 4-16 first tubes 22 can be set, and the diameter of a single first tube 22 is 300mm to 1000mm. For example, when the number of first tubes 22 is 4, the diameter of the first tube 22 can be 800mm, 850mm, 900mm, 984mm or 1000mm. For another example, when the number of first tubes 22 is 10, the diameter of the first tube 22 is 400mm, 450mm or 500mm.

[0060] In this embodiment, the phase separation cavity 12 has a large cross-sectional size. By arranging multiple first tubes 22, the liquid flow rate of a single first tube 22 can be reduced, thereby reducing the disturbance intensity of the solution at the corresponding position. This allows the rich liquid in the liquid collection cavity 23 to be dispersed at different positions in the middle region of the phase separation cavity 12 through multiple first tubes 22, thereby improving the stability of the phase separation and stratification of the solution in the phase separation cavity 12.

[0061] As shown in Figure 3, in some embodiments, the first flow stabilizer 31 includes a second plate, the middle part of which corresponds to the first drain port 24, and the circumferential edge of the second plate extends away from the first pipe 22 and is inclined upward.

[0062] The circumferential edge of the second plate is annular, and the circumferential edge of the second plate is coaxially arranged with the first tube 22. When the rich liquid flowing out of the first tube 22 falls onto the second plate, it can be blocked by the second plate to reduce its kinetic energy. At this time, the rich liquid is in the middle region of the solution in the phase separation chamber 12, and its kinetic energy can be reduced by the existing solution in the phase separation chamber 12.

[0063] In some embodiments, the second plate is approximately hemispherical or approximately frustum-shaped, forming an approximately hemispherical shell structure or an approximately frustum-shaped shell structure.

[0064] In this embodiment, the second plate blocks and guides the rich liquid entering the phase separation chamber 12 through the first drain port 24, reducing the disturbance intensity to the solution below the second plate. At the same time, it guides the rich liquid away from the first pipe 22 and causes the rich liquid to flow upward at an angle. The second flow stabilizer 32 further guides the rich liquid, reducing the disturbance intensity to the solution above the second flow stabilizer 32. This allows the rich liquid to diffuse in a roughly horizontal direction between the first flow stabilizer 31 and the second flow stabilizer 32, thereby improving the phase separation effect and efficiency.

[0065] As shown in Figure 3, in some embodiments, the second flow stabilizer 32 includes a third plate, which is arranged opposite to the second plate in the vertical direction. The third plate is sleeved on the first tube 22, and the circumferential edge of the third plate extends away from the first tube 22. The distance between the circumferential edge of the third plate and the first tube 22 in the horizontal direction is greater than the distance between the circumferential edge of the second plate and the first tube 22 in the horizontal direction.

[0066] In other words, in this embodiment of the present disclosure, the third plate further guides and stabilizes the flow of the rich liquid after it has been guided and redirected by the second plate, reduces the kinetic energy of the rich liquid, and allows the rich liquid between the second and third plates to gradually become stable and diffuse in a roughly horizontal direction.

[0067] As shown in Figure 3, in some embodiments, the third plate has a first annular section 321, a second annular section 322, and a third annular section 323 arranged sequentially in a direction away from the first pipe 22. The first annular section 321 is inclined upward from the side closer to the first pipe 22 to the side away from the first pipe 22, and the third annular section 323 is inclined downward from the side closer to the first pipe 22 to the side away from the first pipe 22.

[0068] In this embodiment, the third plate is designed in segments. The first annular segment 321 can reduce the flow resistance of the rich liquid, allowing the rich liquid flowing into the phase separation cavity 12 to spread horizontally as quickly as possible. The second annular segment 322 smoothly transitions between the first annular segment 321 and the third annular segment 323, guiding the rich liquid to flow downward. At this time, the kinetic energy of the rich liquid in the vertical direction is reduced, and the rich liquid can spread as much as possible in the middle region of the phase separation cavity 12 when it spreads horizontally, causing the liquid level in the middle region to rise steadily as a whole. This can reduce the disturbance to the upper lean phase solution of the phase separation cavity 12 and prevent the upper lean phase solution of the phase separation cavity 12 from boiling.

[0069] Both the first annular segment 321 and the third annular segment 323 are frustoconical in shape.

[0070] In some embodiments, the angle between the first annular section 321 and the horizontal plane is 30° to 60°, for example, 30°, 33°, 42°, 45°, 47°, 51°, 53.8°, 58.3° or 60°. When the angle between the first annular section 321 and the horizontal plane is less than 30°, it is easy to cause the overall structure of the third plate to be too large, and the distance between the circumferential edge of the third plate and the first pipe 22 to be too large, which affects the distribution of the rich liquid and is not conducive to the diffusion of the rich liquid to the top of the third plate. When the angle between the first annular section 321 and the horizontal plane is greater than 60°, it is easy to cause the flow resistance of the rich liquid to be too large, which is not conducive to the diffusion of the rich liquid and makes it difficult for the rich liquid to flow in the first pipe 22.

[0071] The angle between the third annular section 323 and the horizontal plane is 10° to 25°. For example, the angle between the third annular section 323 and the horizontal plane is 10°, 11°, 13°, 17°, 20°, 24.6° or 25°. When the angle between the third annular section 323 and the horizontal plane is less than 10°, the rich liquid that diffuses to the outer side of the third plate in the horizontal direction tends to surge upward, which can easily cause a large disturbance to the upper layer solution of the phase separation chamber 12. When the angle between the third annular section 323 and the horizontal plane is greater than 25°, it affects the diffusion of the rich liquid in the horizontal direction, which can easily cause a disturbance to the lower layer solution of the phase separation chamber 12 and is not conducive to the phase separation of the rich liquid.

[0072] In some embodiments, as shown in FIG3, the second plate has a plurality of first diversion channels 311, the plurality of first diversion channels 311 being arranged at circumferential intervals along the second plate, the first diversion channels 311 extending in a direction away from the first pipe 22, and the cross-sectional dimensions of the first diversion channels 311 gradually increasing from the end closer to the first pipe 22 to the end away from the first pipe 22.

[0073] As shown in Figure 3, the third plate has a plurality of second diversion channels 234, which are arranged at intervals along the circumference of the third plate. The second diversion channels 234 extend in a direction away from the first pipe 22, and the cross-sectional dimensions of the second diversion channels 234 gradually increase from the end closer to the first pipe 22 to the end away from the first pipe 22.

[0074] The arrangement of the first diversion groove 311 and the second diversion groove 234 on the second and third plates in this embodiment enables the diversion of the rich liquid between the second and third plates, allowing some of the rich liquid to flow out through the first diversion groove 311 and the second diversion groove 234. Furthermore, during the flow of the rich liquid between the second and third plates, the solution with a predominantly rich phase can flow down to the second plate through the first diversion groove 311, while the solution with a predominantly poor phase can flow up to the third plate through the second diversion groove 234. In this embodiment, the rich liquid entering the phase separation cavity 12 can diffuse and separate more quickly, reducing the amount of rich liquid after being guided by the third plate and improving the uniformity of the distribution of the rich liquid in the middle region of the phase separation cavity 12.

[0075] In some embodiments, multiple through holes can be provided on the second plate and the third plate. The flow area of ​​the through holes is proportional to the distance of the through holes from the first pipe 22, and the effect obtained is similar to that obtained by the diversion channel.

[0076] In some embodiments, as shown in FIG1, the first flow stabilizing assembly 3 further includes a first frame 33, which is connected to the tower body 1. The first flow stabilizer 31 and the second flow stabilizer 32 are connected to the first frame 33. It should be understood that both the first flow stabilizer 31 and the second flow stabilizer 32 will bear a certain impact force from the rich liquid. Therefore, by arranging the first frame 33 inside the tower body 1 and fixing the first flow stabilizer 31 and the second flow stabilizer 32 to the first frame 33, the impact force borne by the first flow stabilizer 31 and the second flow stabilizer 32 can be transferred to the tower body 1, thereby improving the structural stability of the first flow stabilizing assembly 3.

[0077] For example, the first frame 33 includes multiple support beams, the two ends of which are connected and fixed to support seats provided on the inner wall of the phase separation cavity 12. The first current stabilizer 31 and the second current stabilizer 32 are welded and fixed to the support beams or fixed by bolts.

[0078] In some embodiments, as shown in Figures 1 and 2, the absorption tower 100 with absorbent phase separation function further includes an overflow tank 4. The overflow tank 4 is disposed on the side wall of the phase separation chamber 12 and is located above the first flow stabilizing component 3. The lean phase solution outlet 14 is connected to the overflow tank 4. The lean phase solution in the phase separation chamber 12 overflows into the overflow tank 4 and is discharged through the lean phase solution outlet 14.

[0079] The overflow tank 4 in this embodiment allows the lean phase solution to overflow into the overflow tank 4 and then be pumped out, reducing the disturbance to the solution in the phase separation chamber 12 when the lean phase solution is pumped out, and making the liquid level in the phase separation chamber 12 more stable.

[0080] The overflow trough 4 can be a section provided along the circumferential sidewall of the phase separation cavity 12, or it can be a closed annular overflow trough 4 provided along the circumferential sidewall of the phase separation cavity 12.

[0081] In some embodiments, there may be one or more lean phase solution outlets 14, for example, there may be two, three or five lean phase solution outlets 14.

[0082] In some embodiments, as shown in Figures 1, 2 and 4, the absorber tower 100 with absorbent phase separation function further includes a second flow stabilizing component 5. The second flow stabilizing component 5 includes a fourth plate 51 and a plurality of second pipes 52. The fourth plate 51 is disposed in the phase separation chamber 12 and is located below the first flow stabilizing component 3. The fourth plate 51 divides the phase separation chamber 12 into a first chamber 121 located above the fourth plate 51 and a second chamber 122 located below the fourth plate 51. The rich phase solution outlet 13 is connected to the second chamber 122.

[0083] Multiple second tubes 52 are connected to the fourth plate 51. One end of the second tube 52 is connected to the first chamber 121, and the other end of the second tube 52 is the second drain port 521. The second drain port 521 is located inside the second chamber 122, and the height of the second drain port 521 in the vertical direction is lower than that of the rich phase solution outlet 13.

[0084] It should be understood that most or all of the rich phase solution flowing into the second chamber 122 originates from the first chamber 121 and flows into the second chamber 122 through the second pipe 52. Since the rich phase solution outlet 13 is located above the second drain port 521, the pumping out of the rich phase solution in the second chamber 122 will not disturb the solution in the first chamber 121. This solves the problem of draining the rich phase solution in the ultra-large cross-section phase separation chamber 12, making the solution in the phase separation chamber 12 more stable and improving the phase separation effect and efficiency.

[0085] The number of second tubes 52 can be 4 to 40. Specifically, the number of second tubes 52 can be 4, 7, 10, 13, 19, 21, 24, 28, 36 or 40.

[0086] Multiple second tubes 52 are arranged in a rectangular array or a circular array.

[0087] The second flow stabilizing component 5 of this embodiment allows the rich phase solution to flow into the second chamber 122 first and then be discharged from the rich phase solution outlet 13. At the same time, it makes the rich phase solution at the bottom of the first chamber 121, which is on the same horizontal plane, enter the second chamber 122 more uniformly and consistently. This avoids large disturbances in the area close to the rich phase solution outlet due to the discharge of the rich phase solution, and also prevents the rich phase solution in the area far from the rich phase solution outlet from failing to converge to the rich phase solution outlet in time, thus affecting the uniformity of the distribution of the rich phase solution in the phase separation chamber 12 and the effect of the discharge.

[0088] As shown in Figure 4, in some embodiments, the fourth plate 51 is provided with a connecting hole 511, which is used to connect the first chamber 121 and the second chamber 122.

[0089] The connecting hole 511 in this embodiment can connect the first chamber 121 and the second chamber 122, preventing the rich phase solution from failing to fill the second chamber 122 and improving the pumping effect. Furthermore, the main function of the connecting hole 511 is not to allow the rich phase solution in the first chamber 121 to flow into the second chamber 122 through the connecting hole 511. Therefore, the number and diameter of the connecting holes 511 should not be too large to avoid causing significant disturbance to the solution in the first chamber 121 during the pumping of the rich phase solution due to the setting of the connecting holes 511.

[0090] The connecting hole 511 is located in the area of ​​the fourth plate 51 away from the rich phase solution outlet 13.

[0091] It should be understood that the amount of solution flowing into the second chamber 122 through the connecting hole 511 is very small compared to the total amount of solution flowing into the second chamber 122 from the first chamber 121, and the solution flowing directly into the second chamber 122 through the connecting hole 511 will not cause significant disturbance to the solution in the first chamber 121, and will not affect the phase separation of the solution in the first chamber 121.

[0092] In some embodiments, the sum of the flow areas of the connecting holes 511 on the fourth plate 51 is less than 1 / 50 of the sum of the flow areas of all the second pipes 52. For example, the sum of the flow areas of the connecting holes 511 on the fourth plate 51 is 1 / 50, 1 / 65, 1 / 76, 1 / 85, 1 / 91, 1 / 100, or 1 / 200 of the sum of the flow areas of all the second pipes 52. This ensures that the gas in the second chamber 122 can enter the first chamber 121 through the connecting holes 511, allowing the second chamber 122 to be filled with the rich-phase solution as much as possible, thereby improving the pumping efficiency.

[0093] In some embodiments, there is a gap between the circumferential edge of the fourth plate 51 and the inner wall of the phase separation cavity 12. This gap can be used to fill the second chamber 122 with the rich liquid as much as possible. When the rich phase solution of the first chamber 121 flows to the second chamber 122 through the gap between the circumferential edge of the fourth plate 51 and the inner wall of the phase separation cavity 12, the disturbance to the solution in the phase separation cavity 12 is small because it is close to the side wall of the phase separation cavity 12.

[0094] When assembling the fourth plate 51, it is not necessary to seal the circumferential edge of the fourth plate 51 with the inner wall of the phase separation cavity 12, which reduces the difficulty and cost of installation.

[0095] In some embodiments, the number of connecting holes 511 is multiple, and the flow area of ​​the connecting holes 511 is proportional to the distance of the connecting hole 511 from the rich phase solution outlet 13. That is, in order to increase the flow rate of the rich phase solution from the first chamber 121 to the second chamber 122, multiple connecting holes 511 can be provided, and the flow area of ​​the connecting holes 511 can be proportional to the distance of the connecting hole from the rich phase solution outlet 13. In other words, the closer the connecting hole 511 is to the rich phase solution outlet 13, the smaller the flow area of ​​the connecting hole 511; and the farther the connecting hole 511 is from the rich phase solution outlet 13, the larger the flow area of ​​the connecting hole 511.

[0096] The number of connecting holes 511 can be 4-20, and the diameter of the connecting holes 511 can be 20-200mm. For example, the diameter of multiple connecting holes 511 can be any one or more combinations of 20mm, 30mm, 36mm, 45mm, 70mm, 85mm, 105mm, 134mm, 178mm, 189mm, and 200mm. When multiple connecting holes 511 with different diameters are used, the diameter of the connecting holes 511 closer to the rich phase solution outlet 13 is smaller, and the diameter of the connecting holes 511 farther away from the rich phase solution outlet 13 is larger.

[0097] In this embodiment, constraining the sum of the flow areas of the connecting holes 511 on the fourth plate 51 can reduce disturbance to the solution in the first chamber 121. When multiple connecting holes 511 are provided, constraining the flow areas of different connecting holes 511 can make the rich phase solution in the first chamber 121, which is on the same horizontal plane, flow downward more uniformly.

[0098] At this time, not only is the flow rate requirement of the rich phase solution flowing from the first chamber 121 to the second chamber 122 met, but the flow of the rich liquid into the second chamber 122 through the connecting holes 511 at different positions on the same horizontal plane in the first chamber 121 is also relatively uniform.

[0099] In some embodiments, there are multiple rich phase solution outlets 13, which are arranged at circumferential intervals along the phase separation cavity 12.

[0100] This embodiment of the present disclosure can also improve the pumping efficiency of the rich phase solution by setting multiple rich phase solution outlets 13, so that the phase separation effect of the solution at different positions in the phase separation chamber 12 is more stable and more consistent.

[0101] The number of rich phase solution outlets 13 can be 2, 3, 4, 6, or 8. When multiple rich phase solution outlets 13 are set around the second chamber 122, the liquid level in the second chamber 122 can be better balanced, thereby improving the pumping effect and ensuring that the flow rate in the second pipe 52 at different positions tends to be consistent.

[0102] The present invention, through the above-described structural configuration, enables a higher proportion of lean phase solution in the rich solution, increasing the proportion of lean phase solution separated by the phase separator in related technologies by 5-15%. This reduces the amount of rich phase solution flowing to the regeneration stage, thereby reducing energy consumption. Furthermore, the phase separation efficiency of the present invention is further improved, which can reduce the total amount of absorbent solution circulating in the entire system.

[0103] In the description of this disclosure, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0104] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0105] In this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0106] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0107] In this disclosure, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0108] Although embodiments of the present disclosure have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present disclosure.

[0109] All embodiments disclosed herein can be executed individually or in combination with other embodiments, and are all considered to be within the scope of protection claimed by this disclosure.

Claims

1. An absorption column having absorbent phase splitting function, characterized by, The application relates to a tower body, a liquid collecting assembly, a first flow stabilizing assembly, a rich phase solution outlet and a lean phase solution outlet. The tower body has an absorption cavity and a phase separation cavity arranged in sequence from top to bottom. The liquid collecting assembly is arranged at the top of the phase separation cavity and has a first liquid outlet arranged at the middle of the phase separation cavity and used for collecting the absorbent falling from the absorption cavity and conveying the absorbent to the middle of the phase separation cavity. The first flow stabilizing assembly is arranged at the middle of the phase separation cavity and comprises a first flow stabilizing piece arranged below the first liquid outlet and a second flow stabilizing piece arranged above the first liquid outlet. The rich phase solution outlet is arranged below the first flow stabilizing assembly and used for pumping the rich phase solution in the phase separation cavity.

2. The absorber column with absorbent phase splitting function according to claim 1, characterized in that, The second flow stabilizing piece is arranged above the first flow stabilizing assembly and used for pumping the lean phase solution in the phase separation cavity.

3. The absorber column with absorbent phase splitting function according to claim 2, characterized in that, The liquid collecting assembly comprises a first plate and a first pipe connected with each other.

4. The absorber column with absorbent split function according to any one of claims 1 to 3, characterized in that, The circumferential edge of the first plate is connected with the inner wall of the tower body and forms a liquid collecting cavity above the first plate.

5. The absorber column with absorbent phase splitting function according to claim 4, characterized in that, One end of the first pipe is connected with the liquid collecting cavity, and the other end of the first pipe is the first liquid outlet.

6. The absorber column with absorbent split function according to claim 5, characterized in that, The absorbent in the liquid collecting cavity flows into the phase separation cavity along the first pipe.

7. The absorber column with absorbent phase splitting function according to claim 6, characterized in that, The first pipe is arranged in parallel and spaced apart in the phase separation cavity. The first flow stabilizing piece comprises a second plate. The middle of the second plate corresponds to the first liquid outlet. The circumferential edge of the second plate extends away from the first pipe and is arranged in an upward inclination. The second flow stabilizing piece comprises a third plate. The third plate is arranged in the vertical direction opposite to the second plate. The third plate is sleeved on the first pipe. The circumferential edge of the third plate extends away from the first pipe. The distance between the circumferential edge of the third plate and the first pipe in the horizontal direction is greater than the distance between the circumferential edge of the second plate and the first pipe in the horizontal direction. The third plate has a first annular section, a second annular section and a third annular section arranged in sequence away from the first pipe. The first annular section is arranged in an upward inclination from the side close to the first pipe to the side away from the first pipe. The third annular section is arranged in a downward inclination from the side close to the first pipe to the side away from the first pipe. The second plate has a plurality of first flow dividing grooves arranged in the circumferential direction of the second plate. The first flow dividing grooves extend away from the first pipe. The cross-sectional size of the first flow dividing grooves gradually increases from the side close to the first pipe to the side away from the first pipe. And / or, the third plate has a plurality of second flow distribution grooves, the plurality of second flow distribution grooves are arranged at intervals along the circumference of the third plate, the second flow distribution grooves extend in a direction away from the first pipe, and the cross-sectional dimension of the second flow distribution grooves gradually increases from one end close to the first pipe to one end away from the first pipe; And / or, the first flow stabilizing assembly further comprises a first frame body, the first frame body is connected to the tower body, and the first flow stabilizing member and the second flow stabilizing member are connected to the first frame body; And / or, the second plate is in a semispherical shape or a frustum shape; And / or, further comprising an overflow groove, the overflow groove is arranged on the side wall of the phase separation cavity, the overflow groove is located above the first flow stabilizing assembly, and the lean phase solution outlet is in communication with the overflow groove, so that the lean phase solution in the phase separation cavity overflows into the overflow groove and is discharged through the lean phase solution outlet.

8. The absorber column with absorbent split function according to any one of claims 1 to 7, characterized in that, Further comprising a second flow stabilizing assembly, the second flow stabilizing assembly comprises: A fourth plate, the fourth plate is arranged in the phase separation cavity, and the fourth plate is located below the first flow stabilizing assembly, the fourth plate divides the phase separation cavity into a first chamber located above the fourth plate and a second chamber located below the fourth plate, and the rich phase solution outlet is in communication with the second chamber; A plurality of second pipes, the plurality of second pipes are connected to the fourth plate, one end of the second pipe is in communication with the first chamber, and the other end of the second pipe is a second liquid outlet, the second liquid outlet is located in the second chamber, and the height of the second liquid outlet in the vertical direction is lower than that of the rich phase solution outlet.

9. The absorber column with absorbent phase splitting function according to claim 8, characterized in that, The fourth plate is provided with a communication hole for communicating the first chamber and the second chamber.

10. The absorber column with absorbent phase splitting function according to claim 9, characterized in that, The gap between the circumferential edge of the fourth plate and the inner wall of the phase separation cavity; Or, the sum of the flow areas of the communication holes on the fourth plate is less than 1 / 50 of the sum of the flow areas of all the second pipes; Or, the number of the communication holes is multiple, and the flow area of the communication hole is proportional to the distance of the communication hole from the rich phase solution outlet; Or, the number of the rich phase solution outlets is multiple, and the plurality of rich phase solution outlets are arranged at intervals along the circumference of the phase separation cavity.

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