Regeneration tower structure and carbon capture system with same

Abstract

The invention provides a regeneration tower structure and a carbon capture system with the regeneration tower structure, the regeneration tower structure comprises a tower body, the tower body is internally provided with a reaction cavity and a separation cavity which are communicated with each other, and the reaction cavity is used for introducing flue gas; the spraying assembly is arranged in the reaction cavity, and the spraying assembly is used for spraying reaction liquid which is subjected to chemical reaction with the flue gas so as to obtain a gas-liquid mixture; the separation membrane group is arranged in the separation cavity, the separation membrane group comprises a plurality of membrane bodies, the plurality of membrane bodies are arranged at intervals in the length direction of the separation cavity, and after a gas-liquid mixture in the reaction cavity sequentially flows through the membrane bodies, gas and liquid in the gas-liquid mixture are separated through the membrane bodies. The problems that in the prior art, an absorption tower and a regeneration tower operate independently, an operation system is complex, and the installation space is occupied are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of regeneration towers, and in particular to a regeneration tower structure and a carbon capture system having the same. Background Art

[0002] In the carbon capture system, the absorption tower and the regeneration tower are connected in series. The main function of the absorption tower is to capture carbon dioxide in the flue gas using chemical absorbents. During the absorption process, the carbon dioxide in the flue gas reacts chemically with the absorbent to form a rich liquid. After that, the rich liquid containing carbon dioxide is sent to the regeneration tower, where the carbon dioxide is purified and the absorbent is regenerated.

[0003] However, in the above-mentioned configuration, the absorption tower and the regeneration tower need to be separately arranged, which not only occupies the installation space, but also increases the complexity of the operating system. Summary of the invention

[0004] The main purpose of the present invention is to provide a regeneration tower structure and a carbon capture system having the same, so as to solve the problem in the prior art that the absorption tower and the regeneration tower are operated independently, the operating system is complex and occupies installation space.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a regeneration tower structure is provided, comprising: a tower body, a reaction chamber and a separation chamber interconnected with each other are arranged in the tower body, the reaction chamber is used to introduce flue gas; a spray assembly is arranged in the reaction chamber, the spray assembly is used to spray a reaction liquid that chemically reacts with the flue gas to obtain a gas-liquid mixture; a separation membrane group is arranged in the separation chamber, the separation membrane group comprises a plurality of membrane bodies, the plurality of membrane bodies are spaced apart along the length direction of the separation chamber, after the gas-liquid mixture in the reaction chamber flows through each membrane body in turn, the gas and liquid in the gas-liquid mixture are separated by the membrane body.

[0006] Furthermore, the separation membrane group also includes: a support frame, which is sleeved on the membrane body, the support frame extends along the circumferential direction of the membrane body, and the support frame is connected to the inner wall surface of the separation chamber; there are multiple support frames, and the multiple support frames are arranged one-to-one with the multiple membrane bodies.

[0007] Furthermore, a mounting groove is provided on the inner wall surface of the separation chamber, and at least a part of the support frame is embedded in the mounting groove; wherein the support frame can be elastically arranged.

[0008] Furthermore, the separation membrane group also includes: an elastic support, which is a mesh structure, the membrane body is arranged on the elastic support and connected to the elastic support, the membrane body is supported by the elastic support, and the circumferential end surface of the elastic support is connected to the inner wall surface of the separation chamber.

[0009] Furthermore, the elastic support includes: a first elastic support and a second elastic support, and the membrane body is arranged between the first elastic support and the second elastic support; the separation membrane group also includes: a support frame, which is mounted on the first elastic support and the second elastic support, and the support frame is respectively connected to the first elastic support and the second elastic support, and the support frame can be flexibly arranged.

[0010] Furthermore, each membrane body is arranged to be inclined in the same direction; each membrane body comprises a first membrane end and a second membrane end, and the second membrane end is closer to the reaction chamber than the first membrane end.

[0011] Furthermore, the regeneration tower structure also includes: a water receiving tray, which is arranged in the separation chamber and located below the second membrane end of the membrane body, and the water receiving tray extends from the inner wall surface of the separation chamber toward the middle of the separation chamber.

[0012] Furthermore, the water receiving tray includes a connecting side and an avoidance side, and the inner wall surface of the separation chamber includes a first wall segment and a second wall segment; the connecting side is connected to the first wall segment, the avoidance side is opposite to the second wall segment and is arranged at an interval, and a passing space for the gas-liquid mixture to pass through is arranged between the avoidance side and the second wall segment.

[0013] Furthermore, a drainage channel is provided on the tower body; the drainage channel is arranged at the bottom of the separation chamber, the water inlet of the drainage channel is opposite to the water receiving tray, and the water in the water receiving tray is discharged through the drainage channel; a control valve is also provided on the drainage channel, and the on and off of the drainage channel is controlled by the control valve.

[0014] According to another aspect of the present invention, a carbon capture system is provided, comprising a regeneration tower structure, wherein the regeneration tower structure is the above-mentioned regeneration tower structure.

[0015] The technical solution of the present invention is applied, and the regeneration tower structure includes a tower body, a spray assembly and a separation membrane group. The tower body is provided with a reaction chamber and a separation chamber that are interconnected, and the reaction chamber is used to introduce flue gas; the spray assembly is arranged in the reaction chamber, and the spray assembly is used to spray the reaction liquid that chemically reacts with the flue gas to obtain a gas-liquid mixture; the separation membrane group is arranged in the separation chamber, and the separation membrane group includes a plurality of membrane bodies, and the plurality of membrane bodies are arranged at intervals along the length direction of the separation chamber. After the gas-liquid mixture in the reaction chamber flows through each membrane body in turn, the gas and liquid in the gas-liquid mixture are separated by the membrane body. This arrangement integrates the absorption process of carbon dioxide and the process of separating carbon dioxide from the mixed liquid in the same tower body, and there is no need to separately set up a series-connected absorption tower and regeneration tower, which greatly reduces the occupied space, and at the same time saves the transmission structure between the two tower bodies, making the overall control simpler. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 A structural schematic diagram showing an embodiment of a regeneration tower structure according to the present invention is shown;

[0018] Figure 2 A schematic structural diagram of a separation membrane group according to a regeneration tower structure of the present invention is shown;

[0019] Figure 3 A top view of a separation membrane group according to a regeneration tower structure of the present invention is shown;

[0020] Figure 4 The schematic diagram of the installation of the separation membrane group in the regeneration tower structure according to the present invention is shown.

[0021] The above drawings include the following reference numerals:

[0022] 1. Tower body; 10. Reaction chamber; 11. Separation chamber; 2. Spray assembly; 3. Separation membrane group; 30. Membrane body; 31. Support frame; 110. Installation groove; 32. Elastic bracket; 321. First elastic bracket; 322. Second elastic bracket; 301. First membrane end; 302. Second membrane end; 4. Water receiving tray; 40. Connection side; 41. Avoidance side; 12. Drainage channel; 120. Control valve; 13. Air outlet channel. DETAILED DESCRIPTION

[0023] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0024] As mentioned in the background technology, in the existing carbon capture system, the absorption tower and the regeneration tower are two independent tower bodies. Carbon dioxide is absorbed in the absorption tower, and the absorbed liquid is transported to the regeneration tower for purifying the carbon dioxide in the liquid. However, such an arrangement requires the establishment of a series system between the absorption tower and the regeneration tower to independently control the two, which increases the complexity of the operating system. In addition, the absorption tower and the regeneration tower are both large in size, and the series arrangement of the two tower bodies occupies a large installation space. Therefore, in view of the above technical problems, the present invention provides a regeneration tower structure, wherein a tower body is provided with a reaction chamber 10 and a separation chamber 11 which are interconnected, the reaction chamber 10 is used to introduce flue gas, and a spray assembly 2 is provided in the reaction chamber 10, the spray assembly 2 reacts chemically with the introduced flue gas to remove toxic gases such as sulfides and nitrides in the flue gas, and the mixture after the reaction includes carbon dioxide and water vapor; further, a separation membrane group 3 is provided in the separation chamber 11, and the separation membrane group 3 includes a plurality of membrane bodies 30 arranged at intervals, and in the process of the gas-liquid mixture flowing through each membrane body 30, each membrane body 30 absorbs the liquid in the gas-liquid mixture, and carbon dioxide passes through each membrane body 30 and continues to flow upward, and is finally discharged through the gas outlet channel 13 at the top of the tower body 1 to obtain pure carbon dioxide gas. By integrating the reaction process and the separation process in the same tower body, the occupied space is reduced, the operating system is simplified, and the control of the entire carbon dioxide extraction process is made simpler and more convenient.

[0025] Please refer to Figures 1 to 4 The present invention provides a regeneration tower structure, comprising: a tower body 1, wherein a reaction chamber 10 and a separation chamber 11 are interconnected, wherein the reaction chamber 10 is used to introduce flue gas; a spray assembly 2, which is arranged in the reaction chamber 10, and is used to spray a reaction liquid that chemically reacts with the flue gas to obtain a gas-liquid mixture; a separation membrane group 3, which is arranged in the separation chamber 11, and the separation membrane group 3 includes a plurality of membrane bodies 30, wherein the plurality of membrane bodies 30 are spaced apart along the length direction of the separation chamber 11, and after the gas-liquid mixture in the reaction chamber 10 flows through each membrane body 30 in turn, the gas and liquid in the gas-liquid mixture are separated by the membrane body 30.

[0026] The regeneration tower structure provided by the present invention comprises a tower body 1, a spray assembly 2 and a separation membrane group 3. The tower body 1 is provided with a reaction chamber 10 and a separation chamber 11 which are interconnected. The reaction chamber 10 is used to introduce flue gas. The spray assembly 2 is provided in the reaction chamber 10. The spray assembly 2 is used to spray the reaction liquid which reacts chemically with the flue gas to obtain a gas-liquid mixture. The separation membrane group 3 is provided in the separation chamber 11. The separation membrane group 3 comprises a plurality of membrane bodies 30. The plurality of membrane bodies 30 are arranged at intervals along the length direction of the separation chamber 11. After the gas-liquid mixture in the reaction chamber 10 flows through each membrane body 30 in sequence, the gas and liquid in the gas-liquid mixture are separated by the membrane body 30. This arrangement integrates the absorption process of carbon dioxide and the separation process of carbon dioxide from the mixed liquid in the same tower body, and there is no need to separately set up a series-connected absorption tower and a regeneration tower, which greatly reduces the occupied space. At the same time, the transmission structure between the two tower bodies is omitted, making the overall control simpler.

[0027] The regeneration tower structure of the present invention, by providing a plurality of membrane bodies 30, can filter carbon dioxide and liquid step by step as the gas-liquid mixture gradually flows upward, thereby improving the purity of carbon dioxide.

[0028] In the present invention, the membrane body 30 includes a polyvinylamine material and a polyvinyl alcohol material, or the membrane body 30 includes a MOFs (metal organic framework)-based mixed matrix membrane.

[0029] Specifically, Figure 3 As shown, the separation membrane group 3 further includes: a support frame 31, which is sleeved on the membrane body 30, the support frame 31 extends along the circumferential direction of the membrane body 30, and the support frame 31 is connected to the inner wall surface of the separation chamber 11; there are multiple support frames 31, and the multiple support frames 31 are arranged one-to-one with the multiple membrane bodies 30. By sleeved on the membrane body 30, the membrane body 30 is conveniently installed in the separation chamber 11.

[0030] Furthermore, if Figure 4 As shown, a mounting groove 110 is provided on the inner wall surface of the separation chamber 11, and at least a portion of the support frame 31 is embedded in the mounting groove 110; wherein the support frame 31 can be elastically provided. In this way, during the installation process, the elastic deformation of the support frame 31 enables it to be embedded in the mounting groove 110, so that the membrane body 30 can be installed more stably.

[0031] In the embodiments provided by the present invention, Figure 2 and 3As shown, the separation membrane group 3 further includes: an elastic support 32, which is a mesh structure, and the membrane body 30 is arranged on and connected to the elastic support 32. The membrane body 30 is supported by the elastic support 32, and the circumferential end surface of the elastic support 32 is connected to the inner wall surface of the separation chamber 11. The membrane body 30 is supported by the elastic support 32, so that the membrane body 30 is always kept in an expanded state. The elastic support 32 can also limit the membrane body 30. When the membrane body 30 is deformed by the impact force of the mixture or the pressure inside the separation chamber 11, the membrane body 30 can be constrained by the elastic support 32.

[0032] Preferably, the elastic bracket 32 ​​includes: a first elastic bracket 321 and a second elastic bracket 322, and the membrane body 30 is arranged between the first elastic bracket 321 and the second elastic bracket 322; the separation membrane group 3 also includes: a support frame 31, which is sleeved on the first elastic bracket 321 and the second elastic bracket 322, and the support frame 31 is connected to the first elastic bracket 321 and the second elastic bracket 322 respectively, and the support frame 31 can be elastically arranged. Through the clamping of the membrane body 30 by the first elastic bracket 321 and the second elastic bracket 322, the membrane body 30 is kept in an unfolded state, so that the contact area with the gas-liquid mixture is in the optimal effect, and deformation of the membrane body 30 is avoided. The first elastic bracket 321 and the second elastic bracket 322 are connected by the support frame 31, so as to further stabilize the membrane body 30 between the first elastic bracket 321 and the second elastic bracket 322.

[0033] The surfaces of the first elastic bracket 321 , the second elastic bracket 322 and the support frame 31 are respectively provided with anti-corrosion coatings.

[0034] In the specific implementation process, each membrane body 30 is arranged to be tilted in the same direction; each membrane body 30 includes a first membrane end 301 and a second membrane end 302, and the second membrane end 302 is closer to the reaction chamber 10 than the first membrane end 301. In this arrangement, after the membrane body 30 absorbs liquid, the liquid can flow to the same end along the tilt direction of the membrane body 30.

[0035] In order to facilitate the confluence of the liquid absorbed by each membrane body 30, the regeneration tower structure also includes: a water receiving tray 4, which is arranged in the separation chamber 11 and located below the second membrane end 302 of the membrane body 30, and the water receiving tray 4 extends from the inner wall surface of the separation chamber 11 toward the middle of the separation chamber 11.

[0036] The water receiving tray 4 includes a connecting side surface 40 and an avoiding side surface 41, and the inner wall surface of the separation chamber 11 includes a first wall surface segment and a second wall surface segment; the connecting side surface 40 is connected to the first wall surface segment, the avoiding side surface 41 is opposite to the second wall surface segment and is arranged at intervals, and a passing space for the gas-liquid mixture to pass through is arranged between the avoiding side surface 41 and the second wall surface segment. This arrangement avoids the water receiving tray 4 from blocking the flow of the gas-liquid mixture in the reaction chamber 10, so that the gas-liquid mixture in the reaction chamber 10 can flow into the separation chamber 11 through the passing space.

[0037] In the present application, a drainage channel 12 is also provided on the tower body 1; the drainage channel 12 is provided at the bottom of the separation chamber 11, the water inlet of the drainage channel 12 is opposite to the water receiving tray 4, and the water in the water receiving tray 4 is discharged through the drainage channel 12; the drainage channel 12 is also provided with a control valve 120, and the on-off of the drainage channel 12 is controlled by the control valve 120. Preferably, the water receiving tray 4 is arranged obliquely, and the connecting side surface 40 of the water receiving tray 4 is arranged close to the reaction chamber 10 relative to the avoiding side surface 41, so that the liquid in the water receiving tray 4 can flow into the drainage channel 12 along the water receiving tray 4 and be discharged.

[0038] The present invention further provides a carbon capture system, comprising a regeneration tower structure, wherein the regeneration tower structure is the regeneration tower structure of the above embodiment.

[0039] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0040] The regeneration tower structure provided by the present invention comprises a tower body 1, a spray assembly 2 and a separation membrane group 3. The tower body 1 is provided with a reaction chamber 10 and a separation chamber 11 which are interconnected. The reaction chamber 10 is used to introduce flue gas. The spray assembly 2 is provided in the reaction chamber 10. The spray assembly 2 is used to spray the reaction liquid which reacts chemically with the flue gas to obtain a gas-liquid mixture. The separation membrane group 3 is provided in the separation chamber 11. The separation membrane group 3 comprises a plurality of membrane bodies 30. The plurality of membrane bodies 30 are arranged at intervals along the length direction of the separation chamber 11. After the gas-liquid mixture in the reaction chamber 10 flows through each membrane body 30 in sequence, the gas and liquid in the gas-liquid mixture are separated by the membrane body 30. This arrangement integrates the absorption process of carbon dioxide and the separation process of carbon dioxide from the mixed liquid in the same tower body, and there is no need to separately set up a series-connected absorption tower and a regeneration tower, which greatly reduces the occupied space. At the same time, the transmission structure between the two tower bodies is omitted, making the overall control simpler.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A regeneration tower structure, characterized in that: include: A tower body (1), wherein a reaction chamber (10) and a separation chamber (11) which are interconnected are arranged in the tower body (1), and the reaction chamber (10) is used to pass flue gas; A spray component (2) is arranged in the reaction chamber (10), and the spray component (2) is used to spray a reaction liquid that undergoes a chemical reaction with the flue gas to obtain a gas-liquid mixture; A separation membrane group (3) is arranged in the separation chamber (11), and the separation membrane group (3) includes a plurality of membrane bodies (30). The plurality of membrane bodies (30) are arranged at intervals along the length direction of the separation chamber (11). After the gas-liquid mixture in the reaction chamber (10) flows through each of the membrane bodies (30) in sequence, the gas and liquid in the gas-liquid mixture are separated by the membrane bodies (30).

2. The regeneration tower structure according to claim 1, characterized in that: The separation membrane group (3) further comprises: A support frame (31) is sleeved on the membrane body (30), the support frame (31) extends along the circumferential direction of the membrane body (30), and the support frame (31) is connected to the inner wall surface of the separation chamber (11); There are a plurality of the support frames (31), and the plurality of the support frames (31) are arranged in a one-to-one correspondence with the plurality of the membrane bodies (30).

3. The regeneration tower structure according to claim 2, characterized in that: An installation groove (110) is provided on the inner wall surface of the separation chamber (11), and at least a portion of the support frame (31) is embedded in the installation groove (110); Wherein, the support frame (31) can be elastically arranged.

4. The regeneration tower structure according to claim 1, characterized in that: The separation membrane group (3) further comprises: An elastic support (32), wherein the elastic support (32) is a mesh structure, the membrane body (30) is arranged on the elastic support (32) and connected to the elastic support (32), the membrane body (30) is supported by the elastic support (32), and the circumferential end surface of the elastic support (32) is connected to the inner wall surface of the separation chamber (11).

5. The regeneration tower structure according to claim 4, characterized in that: The elastic support (32) comprises: a first elastic support (321) and a second elastic support (322), and the membrane body (30) is arranged between the first elastic support (321) and the second elastic support (322); the separation membrane group (3) also comprises: A support frame (31) is sleeved on the first elastic bracket (321) and the second elastic bracket (322); the support frame (31) is connected to the first elastic bracket (321) and the second elastic bracket (322) respectively; and the support frame (31) can be elastically arranged.

6. The regeneration tower structure according to claim 1, characterized in that: Each of the membrane bodies (30) is arranged to be inclined in the same direction; Each of the membrane bodies (30) comprises a first membrane end (301) and a second membrane end (302), wherein the second membrane end (302) is closer to the reaction chamber (10) than the first membrane end (301).

7. The regeneration tower structure according to claim 6, characterized in that: The regeneration tower structure also includes: A water receiving tray (4) is arranged in the separation chamber (11) and is located below the second membrane end (302) of the membrane body (30). The water receiving tray (4) extends from the inner wall surface of the separation chamber (11) toward the middle of the separation chamber (11).

8. The regeneration tower structure according to claim 7, characterized in that: The water receiving tray (4) comprises a connecting side surface (40) and a avoiding side surface (41), and the inner wall surface of the separation chamber (11) comprises a first wall surface segment and a second wall surface segment; The connecting side surface (40) is connected to the first wall segment, the avoiding side surface (41) is opposite to the second wall segment and is arranged at a distance, and a passing space for a gas-liquid mixture to pass through is arranged between the avoiding side surface (41) and the second wall segment.

9. The regeneration tower structure according to claim 7, characterized in that: The tower body (1) is also provided with a drainage channel (12); The drainage channel (12) is arranged at the bottom of the separation chamber (11), the water inlet of the drainage channel (12) is opposite to the water receiving tray (4), and the water in the water receiving tray (4) is discharged through the drainage channel (12); The drainage channel (12) is also provided with a control valve (120), and the on-off of the drainage channel (12) is controlled by the control valve (120).

10. A carbon capture system, comprising a regeneration tower structure, characterized in that: The regeneration tower structure is the regeneration tower structure according to any one of claims 1 to 9.

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