Absorption tower with absorbent phase splitting function

Abstract

The application discloses an absorption tower with absorbent phase separation function, which comprises a tower body, a liquid collecting assembly, a first flow stabilizing assembly, a rich phase solution outlet and a lean phase solution outlet, wherein the tower body is provided with 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 is used for collecting the absorbent falling from the absorption cavity and conveying the absorbent to the middle part of the phase separation cavity; the first flow stabilizing assembly comprises a first flow stabilizing member and a second flow stabilizing member, and the first flow stabilizing member and the second flow stabilizing member are arranged oppositely to guide the absorbent entering the phase separation cavity to diffuse in the horizontal direction; the rich phase solution outlet is used for pumping and discharging the rich phase solution in the phase separation cavity, and the lean phase solution outlet is used for pumping and discharging the lean phase solution in the phase separation cavity. The application can reduce the floor area of the equipment, reduce the disturbance intensity of the solution in the phase separation cavity, improve the separation effect of the rich phase and the lean phase, reduce the rich liquid amount entering the regeneration stage and reduce the energy consumption.

Description

Technical Field

[0001] The present invention belongs to the technical field of carbon capture, and in particular relates to an absorption tower with an absorbent phase separation function. Background Art

[0002] In carbon capture systems, the traditional organic alcohol amine chemical absorption method has high regeneration energy consumption and operating costs during application. One of the main reasons is that in the existing carbon dioxide capture process, the rich liquid after the absorbent is loaded with carbon dioxide must be sent to the regeneration tower for heating and regeneration. Since the proportion of water in the absorbent is relatively 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%).

[0003] In the related art, in phase-change carbon dioxide capture technology, the rich liquid formed after the phase-change absorbent absorbs carbon dioxide can be automatically concentrated and pre-treated before entering the regeneration tower, and separated 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 the 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 arranged in the absorption tower, the solution disturbance intensity in the phase separation chamber is large, which is not conducive to the stratification of the rich phase solution and the lean phase solution in the phase separation chamber. Summary of the Invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, an embodiment of the present invention proposes an absorption tower with an absorbent phase separation function, which reduces the footprint of the equipment, reduces the disturbance intensity of the solution in the phase separation chamber, improves the separation effect of the rich phase and the lean phase, reduces the amount of rich liquid entering the regeneration stage, and reduces energy consumption.

[0006] An absorption tower with an absorbent phase separation function according to an embodiment of the present invention includes:

[0007] A tower body, wherein the tower body has an absorption chamber and a phase separation chamber arranged in sequence from top to bottom;

[0008] a liquid collecting assembly, the liquid collecting assembly being located at the top of the phase separation chamber and having a first liquid drain port located in the middle of the phase separation chamber, the liquid collecting assembly being used to collect the absorbent falling from the absorption chamber and transport it to the middle of the phase separation chamber;

[0009] a first flow stabilizing component, the first flow stabilizing component being arranged in the middle of the phase separation chamber, the first flow stabilizing component comprising a first flow stabilizing member and a second flow stabilizing member, the first flow stabilizing member being arranged below the first liquid discharge port, the second flow stabilizing member being arranged above the first liquid discharge port, the first flow stabilizing member and the second flow stabilizing member being arranged vertically opposite to each other to guide the absorbent entering the phase separation chamber to diffuse in a horizontal direction;

[0010] A rich phase solution outlet and a lean phase solution outlet are provided on the side wall of the tower body and are connected to the phase separation cavity. The rich phase solution outlet is provided below the first flow stabilizing component to pump out the rich phase solution in the phase separation cavity. The lean phase solution outlet is provided above the first flow stabilizing component to pump out the lean phase solution in the phase separation cavity.

[0011] The absorption tower in the embodiment of the present invention integrates the phase separation function, which reduces the floor space occupied by the phase separator when it is arranged separately, and can directly phase-separate the rich liquid after absorbing carbon dioxide in the phase separation chamber, 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 from being circulated and transported between the absorption tower and the phase separator, thereby reducing energy consumption. At the same time, the embodiment of the present invention is provided with a liquid collecting component, so that the rich liquid collected by the liquid collecting component can be directly transported to the middle of the phase separation chamber, and the first flow stabilizing member and the second flow stabilizing member of the first flow stabilizing member can be used to stabilize the rich liquid flowing into the phase separation chamber, avoiding large disturbances of the rich liquid in the phase separation chamber in the vertical direction, and causing the rich liquid entering the phase separation chamber to diffuse horizontally in the middle of the phase separation chamber and gradually phase and layer, thereby reducing the proportion of the rich phase solution and reducing the energy consumption in the regeneration stage.

[0012] In some embodiments, the liquid collecting component includes a first plate and a first tube connected to each other, the circumferential edge of the first plate is connected to the inner wall of the tower body, and a liquid collecting cavity is formed above the first plate, one end of the first tube is connected to the liquid collecting cavity, and the other end of the first tube is a first drain port, and the absorbent in the liquid collecting cavity flows into the phase separation cavity along the first tube.

[0013] The first plate in the embodiment of the present invention can realize the separation of the absorption chamber and the phase separation chamber, preventing the rich liquid falling from the absorption chamber from directly falling on the solution surface in the phase separation chamber, resulting in a decrease in the quality of the lean phase solution separated out; 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. The use of the first tube in the embodiment of the present invention can guide the rich liquid in the liquid collecting chamber to flow to the middle of the phase separation chamber, so that the rich liquid diffuses in the middle area of ​​the phase separation chamber (the area where the mixed solution is located), reducing the disturbance to the area where the lean phase solution and the area where the rich phase solution are located, and improving the effect and efficiency of phase separation.

[0014] In some embodiments, there are multiple first tubes, and the multiple first tubes are arranged in parallel and at intervals in the phase separation cavity. The first liquid discharge port of each first tube is correspondingly provided with the first flow stabilizing component.

[0015] The cross-sectional size of the phase separation chamber in the embodiment of the present invention is relatively large. 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, so that the rich liquid in the liquid collecting chamber is dispersed at different positions in the middle area of ​​the phase separation chamber through the multiple first tubes, thereby improving the stability of the phase separation and stratification of the solution in the phase separation chamber.

[0016] In some embodiments, the first flow stabilizing member includes a second plate, a middle portion of the second plate corresponds to the first liquid discharge port, and a circumferential edge of the second plate extends away from the first tube and is tilted upward.

[0017] The second plate in the embodiment of the present invention blocks and guides the rich liquid entering the phase separation chamber through the first liquid discharge port, reduces the disturbance intensity of the solution below the second plate, and at the same time guides the rich liquid in a direction away from the first tube, and makes the rich liquid flow obliquely upward, and uses the second flow stabilizer to further guide the rich liquid, reduces the disturbance intensity of the solution above the second flow stabilizer, and makes the rich liquid diffuse in a roughly horizontal direction between the first flow stabilizer and the second flow stabilizer, which can improve the phase separation effect and efficiency.

[0018] In some embodiments, the second flow stabilizer includes a third plate, which is arranged opposite to the second plate in the vertical direction, and the third plate is sleeved on the first tube. The circumferential edge of the third plate extends away from the first tube, and 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.

[0019] The third plate in the embodiment of the present invention further guides and stabilizes the rich liquid after being 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 substantially horizontal direction.

[0020] In some embodiments, the third plate has a first annular segment, a second annular segment, and a third annular segment arranged in sequence in a direction away from the first tube, the first annular segment is inclined upward from a side close to the first tube to a side away from the first tube, and the third annular segment is inclined downward from a side close to the first tube to a side away from the first tube.

[0021] In the embodiment of the present invention, the third plate is designed in sections. The first annular section can reduce the flow resistance of the rich liquid, so that the rich liquid flowing into the phase separation chamber can diffuse in the horizontal direction as quickly as possible. The second annular section smoothly transitions and connects between the first annular section and the third annular section, 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 diffuse as much as possible in the middle area of ​​the phase separation chamber during horizontal diffusion, thereby causing the liquid level in the middle area to rise steadily as a whole, reducing the disturbance to the lean phase solution in the upper layer of the phase separation chamber, and avoiding boiling of the lean phase solution in the upper layer of the phase separation chamber.

[0022] In some embodiments, the second plate has a plurality of first diverter grooves, the plurality of first diverter grooves are spaced apart along the circumference of the second plate, the first diverter grooves extend in a direction away from the first tube, and the cross-sectional size of the first diverter grooves gradually increases from an end close to the first tube to an end away from the first tube;

[0023] And / or, the third plate has a plurality of second diverter grooves, the plurality of second diverter grooves are spaced apart along the circumference of the third plate, the second diverter grooves extend in a direction away from the first tube, and the cross-sectional size of the second diverter grooves gradually increases from an end close to the first tube to an end away from the first tube;

[0024] And / or, the first flow stabilizing assembly further includes a first frame, the first frame is connected to the tower body, and the first flow stabilizing member and the second flow stabilizing member are connected to the first frame;

[0025] and / or, the second plate is hemispherical or frustum-shaped;

[0026] And / or, it also includes an overflow trough, which is arranged on the side wall of the phase separation chamber, the overflow trough is 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 chamber overflows into the overflow trough and is discharged through the lean phase solution outlet.

[0027] The arrangement of the first diverter groove and the second diverter groove on the second plate and the third plate in the embodiment of the present invention can divert the rich liquid between the second plate and the third plate, so that part of the rich liquid can flow out through the first diverter groove and the second diverter groove. In addition, during the flow of the rich liquid between the second plate and the third plate, the solution with a relatively rich phase can flow to the bottom of the second plate through the first diverter groove, and the solution with a relatively poor phase can flow to the top of the third plate through the second diverter groove. In the embodiment of the present invention, the rich liquid entering the phase separation cavity can diffuse and separate faster, reducing the amount of rich liquid after drainage through the third plate, and improving the uniformity of the distribution of the rich liquid in the middle area of ​​the phase separation cavity.

[0028] The overflow tank of the embodiment of the present invention can allow the lean phase solution to overflow into the overflow tank and then be pumped out, thereby reducing the disturbance of the lean phase solution to the solution in the phase separation chamber during pumping, making the liquid level in the phase separation chamber more stable.

[0029] In some embodiments, a second flow stabilizing component is further included, wherein the second flow stabilizing component includes:

[0030] a fourth plate, the fourth plate being disposed in the phase separation chamber and below the first flow stabilizing component, the fourth plate dividing the phase separation chamber into a first chamber above the fourth plate and a second chamber below the fourth plate, the rich phase solution outlet being in communication with the second chamber;

[0031] Multiple second tubes are connected to the fourth plate, one end of the second tube is connected to the first chamber, the other end of the second tube is a second drainage port, the second drainage port is located in the second chamber, and the height of the second drainage port in the vertical direction is lower than the rich phase solution outlet.

[0032] The setting of the second flow stabilizing component in the embodiment of the present invention can make the rich phase solution flow into the second chamber first and then be pumped out from the rich phase solution outlet, while making the rich phase solution on the same horizontal plane at the bottom of the first chamber enter the second chamber more evenly and consistently, avoiding the large disturbance in the area close to the rich phase solution pumping outlet due to the pumping of the rich phase solution, and avoiding the rich phase solution in the area far from the rich phase solution pumping outlet from being unable to converge to the rich phase solution pumping outlet in time, affecting the uniformity of the distribution of the rich phase solution in the phase separation cavity and the pumping effect.

[0033] In some embodiments, a connecting hole is provided on the fourth plate, and the connecting hole is used to connect the first chamber and the second chamber.

[0034] The connecting holes in the embodiment of the present invention can connect the first chamber and the second chamber, thereby preventing the rich-phase solution from not being able to fill the second chamber and improving the pumping effect. 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 aperture of the connecting holes should not be too large to avoid causing large disturbances to the solution in the first chamber when the rich-phase solution is pumped out due to the setting of the connecting holes.

[0035] In some embodiments, a gap is formed between the circumferential edge of the fourth plate and the inner wall of the phase separation chamber;

[0036] Or, the sum of the flow areas of the communicating holes on the fourth plate is less than 1 / 50 of the sum of the flow areas of all the second tubes;

[0037] Alternatively, there are multiple communicating holes, and the flow area of ​​each communicating hole is proportional to the distance between the communicating hole and the rich phase solution outlet;

[0038] Alternatively, there are multiple phase-rich solution outlets, and the multiple phase-rich solution outlets are arranged at intervals along the circumference of the phase separation chamber.

[0039] In the embodiment of the present invention, a gap can be set between the fourth plate and the inner wall of the phase separation chamber, so that the second chamber can be filled with the rich phase solution through the gap between the fourth plate and the inner wall of the phase separation chamber; in the embodiment of the present invention, the sum of the flow areas of the connecting holes on the fourth plate is limited, which can reduce the disturbance to the solution in the first chamber. When multiple connecting holes are provided, the flow areas of different connecting holes are constrained, so that the rich phase solutions on the same horizontal plane in the first chamber can flow downward more evenly and consistently. The embodiment of the present invention can also improve the pumping efficiency of the rich phase solution by providing multiple rich phase solution outlets, so that the phase separation effect of the solutions at different positions in the phase separation chamber is smoother and more consistent. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic structural diagram of an absorption tower with absorbent phase separation function according to an embodiment of the present invention.

[0041] Figure 2 Schematic diagram of the arrangement structure of the first flow stabilizing component (excluding the first frame) and the second flow stabilizing component according to an embodiment of the present invention.

[0042] Figure 3 Schematic diagram of the structure of the first flow stabilizing component according to an embodiment of the present invention.

[0043] Figure 4 2 is a schematic structural diagram of a second flow stabilizing component according to an embodiment of the present invention.

[0044] Reference numerals:

[0045] 100. Absorption tower with absorbent phase separation function;

[0046] 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;

[0047] 2. Liquid collection assembly; 21. First plate; 22. First tube; 23. Liquid collection chamber; 24. First liquid discharge port;

[0048] 3. First flow stabilizing component; 31. First flow stabilizing member; 311. First diverter groove; 32. Second flow stabilizing member; 321. First annular section; 322. Second annular section; 323. Third annular section; 234. Second diverter groove; 33. First frame;

[0049] 4. Overflow trough;

[0050] 5. Second flow stabilizing component; 51. Fourth plate; 511. Connecting hole; 52. Second tube; 521. Second liquid discharge port. DETAILED DESCRIPTION

[0051] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0052] The following is based on Figures 1-4 The absorption tower 100 with absorbent phase separation function according to an embodiment of the present invention is described in detail.

[0053] like Figure 1 and Figure 2 As shown, an absorption tower 100 with an absorbent phase separation function according to an embodiment of the present invention includes a tower body 1, a liquid collecting component 2, and a first flow stabilizing component 3. The tower body 1 has an absorption chamber 11 and a phase separation chamber 12 arranged from top to bottom. The absorbent used in the embodiment of the present invention is a phase change absorbent. The absorbent enters the absorption chamber 11 from the top of the tower body 1 and is fully in 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.

[0054] The liquid collection assembly 2 is located at the top of the phase separation chamber 12 and has a first liquid drain port 24 located in the middle of the phase separation chamber 12. The liquid collection assembly 2 is used to collect the absorbent that falls from the absorption chamber 11 and transport it to the middle of the phase separation chamber 12. The absorbent that falls on 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. The rich phase solution after phase separation is then sent to the subsequent regeneration tower for regeneration, and the lean phase solution can be directly recycled.

[0055] It should be understood that the absorption tower in the embodiment of the present invention integrates the 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 phase-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 from being circulated and transported between the absorption tower and the phase separator, thereby reducing energy consumption.

[0056] The first flow stabilizing component 3 is arranged in the middle of the phase separation chamber 12. The first flow stabilizing component 3 includes a first flow stabilizing member 31 and a second flow stabilizing member 32. The first flow stabilizing member 31 is arranged below the first liquid discharge port 24, and the second flow stabilizing member 32 is arranged above the first liquid discharge port 24. The first flow stabilizing member 31 and the second flow stabilizing member 32 are arranged opposite to each other up and down to guide the absorbent entering the phase separation chamber 12 to diffuse in the horizontal direction.

[0057] The absorption tower of an embodiment of the present invention also 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 arranged on the side wall of the tower body 1 and are connected to the phase separation chamber 12. The rich phase solution outlet 13 is arranged below the first flow stabilizing component 3 to pump out the rich phase solution in the phase separation chamber 12, and the lean phase solution outlet 14 is arranged above the first flow stabilizing component 3 to pump out the lean phase solution in the phase separation chamber 12.

[0058] In the embodiment of the present invention, the liquid collecting component 2 is set up so that the rich liquid collected by the liquid collecting component 2 can be directly transported to the middle of the phase separation chamber 12. The first flow stabilizing member 31 and the second flow stabilizing member 32 of the first flow stabilizing member 3 can stabilize the flow of the rich liquid flowing into the phase separation chamber 12, thereby avoiding large disturbances of the rich liquid in the phase separation chamber 12 in the vertical direction, and causing 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.

[0059] like Figure 1 and Figure 2 As shown, in some embodiments, the liquid collecting component 2 includes a first plate 21 and a first tube 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 collecting cavity 23 is formed above the first plate 21, one end of the first tube 22 is connected to the liquid collecting cavity 23, and the other end of the first tube 22 is a first drain port 24, and the absorbent in the liquid collecting cavity 23 flows into the phase separation cavity 12 along the first tube 22.

[0060] It should be noted that the first plate 21 in the embodiment of the present invention can realize the separation of the absorption chamber 11 and the phase separation chamber 12, thereby preventing the rich liquid falling from the absorption chamber 11 from falling directly on the solution surface in the phase separation chamber 12, resulting in a decrease in the quality of the lean phase solution separated out; in addition, the solution in the phase separation chamber 12 is a lean phase solution, a mixed solution and a rich phase solution in the vertical direction. The first tube 22 in the embodiment of the present invention can guide the rich liquid in the liquid collecting chamber 23 to flow to the middle part of the phase separation chamber 12, so that the rich liquid diffuses in the middle area of ​​the phase separation chamber 12 (the area where the mixed solution is located), reducing the disturbance to the area where the lean phase solution and the area where the rich phase solution are located, and improving the effect and efficiency of the phase separation.

[0061] like Figure 1 and Figure 2 As shown, in some embodiments, there are multiple first tubes 22, and the multiple first tubes 22 are arranged in parallel and at intervals in the phase separation cavity 12, and a first flow stabilizing component 3 is correspondingly provided at the first liquid discharge port 24 of each first tube 22.

[0062] 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 according to the cross-sectional size of the tower body 1 and the rich liquid flow rate.

[0063] Optionally, the inner cavity cross-section of the tower body 1 is rectangular, and the cross-sections of the absorption chamber 11 and the phase-separation chamber 12 are also rectangular. The length of the absorption chamber 11 and the phase-separation chamber 12 can reach 16,000 mm, and the width can reach 12,000 mm. At this time, 4-16 first tubes 22 can be set, and the diameter of a single first tube 22 is 300 mm to 1,000 mm. For example, when the number of first tubes 22 is 4, the diameter of the first tube 22 can be 800 mm, 850 mm, 900 mm, 984 mm or 1,000 mm. For another example, when the number of first tubes 22 is 10, the diameter of the first tube 22 is 400 mm, 450 mm or 500 mm.

[0064] The cross-sectional size of the phase separation chamber 12 in the embodiment of the present invention is relatively large. 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, so that the rich liquid in the liquid collecting chamber 23 is dispersed at different positions in the middle area of ​​the phase separation chamber 12 through multiple first tubes 22, thereby improving the stability of the phase separation and stratification of the solution in the phase separation chamber 12.

[0065] like Figure 3 As shown, in some embodiments, the first flow stabilizer 31 includes a second plate, the middle portion of the second plate corresponds to the first liquid discharge port 24, and the circumferential edge of the second plate extends away from the first tube 22 and is tilted upward.

[0066] 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 area of ​​the solution in the phase separation chamber 12, and its kinetic energy can be reduced by using the existing solution in the phase separation chamber 12.

[0067] Optionally, the second plate is approximately hemispherical or approximately frustoconical, forming an approximately hemispherical shell structure or an approximately frustoconical shell structure.

[0068] The second plate in the embodiment of the present invention blocks and guides the rich liquid entering the phase separation chamber 12 through the first drain port 24, reduces the disturbance intensity of the solution below the second plate, and at the same time guides the rich liquid in a direction away from the first tube 22, and makes the rich liquid flow obliquely upward, and further guides the rich liquid by using the second flow stabilizer 32, reduces the disturbance intensity of the solution above the second flow stabilizer 32, and makes the rich liquid diffuse in a roughly horizontal direction between the first flow stabilizer 31 and the second flow stabilizer 32, which can improve the phase separation effect and efficiency.

[0069] like Figure 3 As shown, in some embodiments, the second flow stabilizer 32 includes a third plate, which is arranged opposite to the second plate in the vertical direction, and the third plate is sleeved on the first tube 22. The circumferential edge of the third plate extends away from the first tube 22, and 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.

[0070] That is, the third plate in the embodiment of the present invention further guides and stabilizes the rich liquid after being 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.

[0071] like Figure 3 As shown, in some embodiments, the third plate has a first annular segment 321, a second annular segment 322 and a third annular segment 323 arranged in sequence along a direction away from the first tube 22, the first annular segment 321 is inclined upward from a side close to the first tube 22 to a side away from the first tube 22, and the third annular segment 323 is inclined downward from a side close to the first tube 22 to a side away from the first tube 22.

[0072] In the embodiment of the present invention, the third plate is designed in sections, and the first annular section 321 can reduce the flow resistance of the rich liquid, so that the rich liquid flowing into the phase separation chamber 12 can diffuse in the horizontal direction as quickly as possible. The second annular section 322 smoothly transitions and connects between the first annular section 321 and the third annular section 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 diffuse as much as possible in the middle area of ​​the phase separation chamber 12 during horizontal diffusion, thereby causing the liquid level in the middle area to rise steadily as a whole, thereby reducing the disturbance to the lean phase solution in the upper layer of the phase separation chamber 12 and avoiding boiling of the lean phase solution in the upper layer of the phase separation chamber 12.

[0073] The first annular section 321 and the third annular section 323 are both truncated cone-shaped.

[0074] Optionally, the angle between the first annular segment 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 segment 321 and the horizontal plane is less than 30°, the overall structure of the third plate may be too large, and the distance between the circumferential edge of the third plate and the first tube 22 may be too large, affecting the distribution of the rich liquid and hindering the rich liquid from diffusing upward from the third plate. When the angle between the first annular segment 321 and the horizontal plane is greater than 60°, the flow resistance of the rich liquid may be too large, hindering the diffusion of the rich liquid and causing difficulty in the flow of the rich liquid in the first tube 22.

[0075] The angle between the third annular segment 323 and the horizontal plane is 10° to 25°. For example, the angle between the third annular segment 323 and the horizontal plane is 10°, 11°, 13°, 17°, 20°, 24.6° or 25°. When the angle between the third annular segment 323 and the horizontal plane is less than 10°, the rich liquid diffused to the outer side in the horizontal direction of the third plate is likely to surge upward, which is likely to cause a large disturbance to the upper solution of the phase separation cavity 12. When the angle between the third annular segment 323 and the horizontal plane is greater than 25°, the horizontal diffusion of the rich liquid is affected, which is likely to cause a disturbance to the lower solution of the phase separation cavity 12, which is not conducive to the phase separation of the rich liquid.

[0076] In some embodiments, as Figure 3 As shown, the second plate has a plurality of first diverter grooves 311, which are arranged at intervals along the circumference of the second plate. The first diverter grooves 311 extend in a direction away from the first tube 22, and the cross-sectional size of the first diverter grooves 311 gradually increases from the end close to the first tube 22 to the end away from the first tube 22.

[0077] like Figure 3 As shown, the third plate has a plurality of second diverter grooves 234, which are arranged at intervals along the circumference of the third plate. The second diverter grooves 234 extend in a direction away from the first tube 22, and the cross-sectional size of the second diverter grooves 234 gradually increases from the end close to the first tube 22 to the end away from the first tube 22.

[0078] The arrangement of the first diverter groove 311 and the second diverter groove 234 on the second plate and the third plate in the embodiment of the present invention can divert the rich liquid between the second plate and the third plate, so that part of the rich liquid can flow out through the first diverter groove 311 and the second diverter groove 234. In addition, during the flow of the rich liquid between the second plate and the third plate, the solution with a relatively rich phase can flow to the bottom of the second plate through the first diverter groove 311, and the solution with a relatively poor phase can flow to the top of the third plate through the second diverter groove 234. In the embodiment of the present invention, the rich liquid entering the phase separation cavity 12 can diffuse and separate faster, reducing the amount of rich liquid after drainage through the third plate, and improving the uniformity of the distribution of the rich liquid in the middle area of ​​the phase separation cavity 12.

[0079] Optionally, a plurality of through holes may be provided on the second plate and the third plate, and the flow area of ​​the through holes is proportional to the distance between the through holes and the first tube 22 , and the effect achieved is similar to that achieved by the diverter groove.

[0080] In some embodiments, as Figure 1 As shown, the first flow stabilizing assembly 3 further includes a first frame 33, which is connected to the tower body 1, and a first flow stabilizing member 31 and a second flow stabilizing member 32 are connected to the first frame 33. It should be understood that the first flow stabilizing member 31 and the second flow stabilizing member 32 will both withstand a certain impact force from the rich liquid. Therefore, by arranging the first frame 33 within the tower body 1 and fixing the first flow stabilizing member 31 and the second flow stabilizing member 32 to the first frame 33, the impact force borne by the first flow stabilizing member 31 and the second flow stabilizing member 32 can be transmitted to the tower body 1, thereby improving the structural stability of the first flow stabilizing assembly 3.

[0081] For example, the first frame 33 includes a plurality of support beams, both ends of which are fixedly connected to support seats provided on the inner wall of the phase separation chamber 12. The first flow stabilizer 31 and the second flow stabilizer 32 are fixedly welded to the support beams or fixedly connected by bolts.

[0082] In some embodiments, as Figure 1 and Figure 2 As shown, the absorption tower 100 with absorbent phase separation function also includes an overflow trough 4, which is arranged on the side wall of the phase separation chamber 12, and the overflow trough 4 is located above the first flow stabilization component 3. The lean phase solution outlet 14 is connected to the overflow trough 4, and the lean phase solution in the phase separation chamber 12 overflows into the overflow trough 4 and is discharged through the lean phase solution outlet 14.

[0083] The setting of the overflow tank 4 in the embodiment of the present invention allows the lean phase solution to overflow into the overflow tank 4 and then be pumped out, reducing the disturbance of the lean phase solution to the solution in the phase separation chamber 12 during the pumping, making the liquid level in the phase separation chamber 12 more stable.

[0084] The overflow groove 4 may be a section provided along the circumferential side wall of the phase separation cavity 12 , or may be a closed ring-shaped overflow groove 4 provided along the circumferential side wall of the phase separation cavity 12 .

[0085] Furthermore, there may be one or more lean solution outlets 14 , for example, there may be 2, 3 or 5 lean solution outlets 14 .

[0086] In some embodiments, as Figure 1 、 Figure 2 and Figure 4 As shown, the absorption tower 100 with absorbent phase separation function also includes a second flow stabilizing component 5, the second flow stabilizing component 5 includes a fourth plate 51 and a plurality of second tubes 52, the fourth plate 51 is arranged in the phase separation chamber 12, and the fourth plate 51 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, and the rich phase solution outlet 13 is connected to the second chamber 122.

[0087] 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 a second drainage port 521. The second drainage port 521 is located in the second chamber 122, and the vertical height of the second drainage port 521 is lower than the rich phase solution outlet 13.

[0088] It should be understood that most or all of the rich phase solution flowing into the second chamber 122 flows from the first chamber 121 through the second tube 52 into the second chamber 122. Since the rich phase solution outlet 13 is located above the second drain port 521, when the rich phase solution in the second chamber 122 is pumped out, it will not cause disturbance to the solution in the first chamber 121, thereby solving the drainage problem of the rich phase solution in the phase separation cavity 12 with an ultra-large cross-section, making the solution in the phase separation cavity 12 more stable, and improving the effect and efficiency of phase separation.

[0089] The number of the second tubes 52 may be 4-40. Specifically, the number of the second tubes 52 is 4, 7, 10, 13, 19, 21, 24, 28, 36 or 40.

[0090] The plurality of second tubes 52 are arranged in a rectangular array or a circular array.

[0091] The setting of the second flow stabilizing component 5 of the embodiment of the present invention can make the rich phase solution flow into the second chamber 122 first, and then be pumped out from the rich phase solution outlet 13, while making the rich phase solution on the same horizontal plane at the bottom of the first chamber 121 enter the second chamber 122 more evenly and consistently, avoiding the large disturbance in the area close to the rich phase solution pumping port due to the pumping of the rich phase solution, and avoiding the rich phase solution in the area far from the rich phase solution pumping port from being unable to converge to the rich phase solution pumping port in time, affecting the uniformity of the distribution of the rich phase solution in the phase separation cavity 12 and the pumping effect.

[0092] like Figure 4 As shown, further, a communication hole 511 is provided on the fourth plate 51 , and the communication hole 511 is used to connect the first chamber 121 and the second chamber 122 .

[0093] The connecting hole 511 of the embodiment of the present invention can connect the first chamber 121 and the second chamber 122, thereby preventing the rich phase solution from not being able to fill the second chamber 122, thereby improving the pumping effect, and 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 aperture of the connecting holes 511 should not be too large to avoid the setting of the connecting holes 511, which may cause a large disturbance to the solution in the first chamber 121 when the rich phase solution is pumped out.

[0094] The communication hole 511 is arranged at a region of the fourth plate 51 away from the rich-phase solution outlet 13 .

[0095] It should be understood that the solution flowing into the second chamber 122 through the connecting hole 511 accounts for a very small proportion of the total amount of the 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 a large disturbance to the solution in the first chamber 121, and will not affect the phase separation of the solution in the first chamber 121.

[0096] Optionally, the sum of the flow areas of the communicating holes 511 on the fourth plate 51 is less than 1 / 50 of the sum of the flow areas of all the second tubes 52. For example, the sum of the flow areas of the communicating 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 tubes 52. This ensures that the gas in the second chamber 122 can enter the first chamber 121 through the communicating holes 511, so that the second chamber 122 can be filled with the rich phase solution as much as possible, thereby improving the pumping efficiency.

[0097] Optionally, there is a gap between the circumferential edge of the fourth plate 51 and the inner wall of the phase separation chamber 12, and the gap can be used to fill the second chamber 122 with rich liquid as much as possible. When the rich phase solution in 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 chamber 12, the disturbance to the solution in the phase separation chamber 12 is small because it is close to the side wall of the phase separation chamber 12.

[0098] When assembling the fourth plate 51 , there is no need to seal the circumferential edge of the fourth plate 51 and the inner wall of the phase separation chamber 12 , which reduces the difficulty and cost of installation.

[0099] Furthermore, there are multiple communicating holes 511, and the flow area of ​​each communicating hole 511 is proportional to the distance between the communicating hole 511 and the rich-phase solution outlet 13. In other words, to increase the flow rate of the rich-phase solution from the first chamber 121 to the second chamber 122, multiple communicating holes 511 can be provided, and the flow area of ​​each communicating hole 511 can be proportional to the distance between the communicating hole 511 and the rich-phase solution outlet 13. In other words, the closer the communicating hole 511 is to the rich-phase solution outlet 13, the smaller the flow area of ​​the communicating hole 511, and the farther the communicating hole 511 is from the rich-phase solution outlet 13, the larger the flow area of ​​the communicating hole 511.

[0100] The number of communicating holes 511 can be 4-20, and the diameter of the communicating holes 511 can be 20-200 mm. For example, the diameters of the communicating holes 511 can be any one or more combinations of 20 mm, 30 mm, 36 mm, 45 mm, 70 mm, 85 mm, 105 mm, 134 mm, 178 mm, 189 mm, and 200 mm. When using multiple communicating holes 511 with different diameters, the closer the communicating holes 511 are to the rich-phase solution outlet 13, the smaller their diameters are, and the farther the communicating holes 511 are from the rich-phase solution outlet 13, the larger their diameters are.

[0101] In the embodiment of the present invention, constraining the sum of the flow areas of the communication holes 511 on the fourth plate 51 can reduce disturbances to the solution in the first chamber 121. When multiple communication holes 511 are provided, constraining the flow areas of different communication holes 511 can ensure that the rich phase solution on the same horizontal surface in the first chamber 121 flows downward more uniformly.

[0102] At this time, not only the flow rate requirement of the rich phase solution flowing from the first chamber 121 to the second chamber 122 is met, but also the rich solution flowing from the connecting holes 511 at different positions on the same horizontal plane in the first chamber 121 to the second chamber 122 can be relatively uniform.

[0103] Optionally, there are multiple phase-rich solution outlets 13 , and the multiple phase-rich solution outlets 13 are arranged at intervals along the circumference of the phase separation chamber 12 .

[0104] The embodiment of the present application can also improve the extraction efficiency of the rich phase solution by setting multiple rich phase solution outlets 13, and make the solution phase separation effect at different positions in the phase separation cavity 12 more stable and better consistent.

[0105] The number of rich phase solution outlets 13 can be 2, 3, 4, 6 or 8. When multiple rich phase solution outlets 13 are arranged in the circumferential direction of the second chamber 122, the liquid level in the second chamber 122 can be better balanced, thereby improving the extraction effect, and the flow rate in the second pipe 52 at different positions can also be consistent.

[0106] Through the above structure, the embodiment of the present application can make the proportion of the lean phase solution in the rich liquid during phase separation higher, which is 5-15% higher than that in the phase separator in the related art, reduces the amount of rich phase solution flowing to the regeneration stage, reduces energy consumption, and at the same time, the phase separation efficiency of the embodiment of the present application is further improved, which can reduce the total amount of circulating absorbent solution in the entire system.

[0107] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0108] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0109] In the present application, unless specifically defined otherwise, the terms "mounting", "connected", "connecting", "fixed", "fixedly connected", "connection", "fixedly connected", "connected", "fixed", and the like should be construed broadly, for example, can be fixed connection, can be detachable connection, or integral; can be mechanical connection, can be electrical connection or communication with each other; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically defined. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0110] In the present application, unless specifically defined otherwise, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "on", "above" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The first feature "under", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0111] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in the specification and the features of different embodiments or examples without contradiction.

[0112] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and cannot be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. An absorption tower with absorbent phase separation function, characterized in that, include: A tower body, wherein the tower body has an absorption chamber and a phase separation chamber arranged in sequence from top to bottom; a liquid collecting assembly, the liquid collecting assembly being located at the top of the phase separation chamber and having a first liquid drain port located in the middle of the phase separation chamber, the liquid collecting assembly being used to collect the absorbent falling from the absorption chamber and transport it to the middle of the phase separation chamber; a first flow stabilizing component, the first flow stabilizing component being arranged in the middle of the phase separation chamber, the first flow stabilizing component comprising a first flow stabilizing member and a second flow stabilizing member, the first flow stabilizing member being arranged below the first liquid discharge port, the second flow stabilizing member being arranged above the first liquid discharge port, the first flow stabilizing member and the second flow stabilizing member being arranged vertically opposite to each other to guide the absorbent entering the phase separation chamber to diffuse in a horizontal direction; A rich phase solution outlet and a lean phase solution outlet, the rich phase solution outlet and the lean phase solution outlet being provided on the side wall of the tower body and being in communication with the phase separation cavity, the rich phase solution outlet being provided below the first flow stabilizing component to pump out the rich phase solution in the phase separation cavity, and the lean phase solution outlet being provided above the first flow stabilizing component to pump out the lean phase solution in the phase separation cavity; The liquid collecting assembly includes a first plate and a first tube connected to each other, the first flow stabilizing member includes a second plate, the middle portion of the second plate corresponds to the first liquid discharge port, and the circumferential edge of the second plate extends away from the first tube and is arranged to be inclined upward; The second flow stabilizer includes a third plate, the third plate being arranged opposite to the second plate in a vertical direction, the third plate being sleeved on the first tube, the circumferential edge of the third plate extending in a direction away from the first tube, and the horizontal distance between the circumferential edge of the third plate and the first tube being greater than the horizontal distance between the circumferential edge of the second plate and the first tube; The third plate includes a first annular section, a second annular section, and a third annular section sequentially arranged in a direction away from the first tube, the first annular section being inclined upward from a side close to the first tube to a side away from the first tube, and the third annular section being inclined downward from a side close to the first tube to a side away from the first tube; The second plate has a plurality of first diverter grooves, and / or the third plate has a plurality of second diverter grooves; Also included is a second flow stabilizing component, the second flow stabilizing component comprising: A fourth plate is arranged in the phase separation chamber, and the fourth plate is located below the first flow stabilizing component. The fourth plate divides the phase separation chamber 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 connected to the second chamber.

2. The absorption tower with absorbent phase separation function according to claim 1, characterized in that: The circumferential edge of the first plate is connected to the inner wall of the tower body, and a liquid collecting cavity is formed above the first plate. One end of the first tube is connected to the liquid collecting cavity, and the other end of the first tube is a first liquid discharge port. The absorbent in the liquid collecting cavity flows into the phase separation cavity along the first tube.

3. The absorption tower with absorbent phase separation function according to claim 2, characterized in that: There are multiple first tubes, and the multiple first tubes are arranged in parallel and at intervals in the phase separation cavity. The first liquid discharge port of each first tube is correspondingly provided with the first flow stabilizing component.

4. The absorption tower with absorbent phase separation function according to claim 1, characterized in that: A plurality of first diverter grooves are spaced apart along the circumference of the second plate, the first diverter grooves extend in a direction away from the first tube, and a cross-sectional size of the first diverter grooves gradually increases from an end close to the first tube to an end away from the first tube; A plurality of second diverter grooves are spaced apart along the circumference of the third plate, the second diverter grooves extend in a direction away from the first tube, and a cross-sectional size of the second diverter grooves gradually increases from an end close to the first tube to an end away from the first tube; And / or, the first flow stabilizing assembly further includes a first frame, the first frame is connected to the tower body, and the first flow stabilizing member and the second flow stabilizing member are connected to the first frame; and / or, the second plate is hemispherical or frustum-shaped; And / or, it also includes an overflow trough, which is arranged on the side wall of the phase separation chamber, the overflow trough is 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 chamber overflows into the overflow trough and is discharged through the lean phase solution outlet.

5. The absorption tower with absorbent phase separation function according to any one of claims 1 to 4, characterized in that: The second flow stabilizing component further includes: A plurality of second tubes are connected to the fourth plate, one end of the second tube is connected to the first chamber, the other end of the second tube is a second drainage port, the second drainage port is located in the second chamber, and the height of the second drainage port in the vertical direction is lower than the rich phase solution outlet.

6. The absorption tower with absorbent phase separation function according to claim 5, characterized in that: A communication hole is provided on the fourth plate, and the communication hole is used to connect the first chamber and the second chamber.

7. The absorption tower with absorbent phase separation function according to claim 6, characterized in that: There is a gap between the circumferential edge of the fourth plate and the inner wall of the phase separation chamber; Or, the sum of the flow areas of the communicating holes on the fourth plate is less than 1 / 50 of the sum of the flow areas of all the second tubes; Alternatively, there are multiple communicating holes, and the flow area of ​​each communicating hole is proportional to the distance between the communicating hole and the rich phase solution outlet; Alternatively, there are multiple phase-rich solution outlets, and the multiple phase-rich solution outlets are arranged at intervals along the circumference of the phase separation chamber.

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