A carbon capture system

Abstract

The utility model provides a kind of carbon capture system, comprising: absorption tower, for receiving processing gas, inside spray for with processing gas and the absorbent solution of reaction;Absorbent storage tank, by solution delivery pipe and absorption tower intercommunication, to receive the absorbent solution after processing gas and reaction in absorption tower;Gas stripping gas storage tank, by gas stripping gas delivery pipe and absorbent storage tank intercommunication, to the absorbent solution in absorbent storage tank with gas stripping gas delivery gas stripping gas, to utilize gas stripping gas and the oxygen gas stripping of absorbent solution in absorbent storage tank;And gas stripping gas stripping tank, by gas receiving pipe and absorbent storage tank intercommunication, by gas output pipe and gas stripping gas storage tank intercommunication, to receive the mixed gas containing gas stripping gas from absorbent storage tank and export, and after gas stripping gas stripping processing gas is delivered to gas stripping gas storage tank.The present application helps to reduce the oxidation degradation reaction occurred in absorbent solution desorption process.

Description

Technical Field

[0001] This utility model relates to the field of carbon capture technology, and in particular to a carbon capture system. Background Technology

[0002] Carbon capture is the process of capturing carbon dioxide from gases and then storing or utilizing it, with the aim of reducing carbon dioxide emissions. Common carbon capture systems are mainly used in the treatment of industrial flue gas. The general process flow is as follows: pretreated flue gas is fed into an absorption tower through a flue, where the absorbent reacts with the carbon dioxide in the flue gas. The rich absorbent solution, having absorbed the carbon dioxide, is then sent to a regeneration tower, where it is heated to release carbon dioxide, which is then subsequently stored or utilized. The lean absorbent solution, after releasing the carbon dioxide, is returned to the absorption tower for recycling.

[0003] However, during the reaction between the absorbent and flue gas within the absorption tower, a certain amount of oxygen dissolves into the absorbent. Furthermore, current technologies typically use high-temperature steam to heat the rich absorbent solution to release carbon dioxide, creating a high-temperature environment within the desorption tower. When the oxygen-laden rich absorbent solution enters the desorption tower for desorption, the oxygen reacts with the rich absorbent solution at high temperatures, causing an oxidation and degradation reaction. This reduces the absorbent's ability to absorb carbon dioxide and shortens its effective cycle life. This is one of the reasons for the high cost of carbon capture absorbents. Utility Model Content

[0004] One objective of this invention is to provide a carbon capture system capable of solving any of the aforementioned problems.

[0005] Specifically, this invention provides a carbon capture system, comprising: An absorption tower is used to receive and process gases, and its interior is sprayed with an absorbent solution to react with the gas. An absorbent storage tank is connected to the absorption tower via a solution delivery pipe, thereby receiving the absorbent solution that has reacted with the treated gas in the absorption tower; A stripping gas storage tank is connected to the absorbent storage tank via a stripping gas delivery pipe, thereby supplying stripping gas to the absorbent solution in the absorbent storage tank to extract oxygen from the absorbent solution. The gas stripping purification tank is connected to the absorbent storage tank via a gas receiving pipe and to the gas stripping gas storage tank via a gas output pipe, thereby receiving the mixed gas containing gas stripping gas flowing out of the absorbent storage tank and transporting the gas purified by the gas stripping gas to the gas stripping gas storage tank.

[0006] Optionally, the absorbent storage tank is provided with a first partition plate, thereby dividing the internal space of the absorbent storage tank into a first space and a second space; A first communication area is provided between the first partition plate and the inner bottom wall of the absorbent storage tank, so that the first space and the second space are connected. The connection point between the solution delivery pipe and the absorbent storage tank is located on the top wall of the first space, and the connection point between the gas receiving pipe and the absorbent storage tank is located on the top wall of the second space. The gas lift delivery pipe extends into the second space to deliver gas lift gas to the absorbent solution located in the second space, and the gas lift gas output position in the second space is higher than the highest point of the first connecting area.

[0007] Optionally, the absorbent storage tank is further provided with a second partition plate, which is disposed in the second space and arranged opposite to the first partition plate, thereby dividing the second space into two parts: one part located on the side of the second partition plate facing the first partition plate and the other part located on the side away from the first partition plate. A second communication area is provided between the second partition plate and the inner top wall of the absorbent storage tank, so that the portions of the second space located on both sides of the second partition plate are connected. The air extraction outlet in the second space is located between the first partition plate and the second partition plate.

[0008] Optionally, a first demisting device is provided at the top of the second space, so that the gas lift-up flow in the absorbent storage tank passes through the first demisting device before flowing to the gas receiving pipe.

[0009] Optionally, the first partition plate and / or the second partition plate are plate-like structures that zigzag along the longitudinal direction.

[0010] Optionally, a return gas pipe is also provided between the absorption tower and the absorbent storage tank. The connection between the return gas pipe and the absorbent storage tank is located on the top wall of the first space. The return gas pipe is used to return a portion of the gas carried by the absorbent solution from the absorption tower back to the absorption tower.

[0011] Optionally, the gas stripping and purification tank is equipped with a second demister, so that the gas in the gas stripping and purification tank passes through the second demister before flowing to the gas output pipe.

[0012] Optionally, the gas stripping storage tank is equipped with a third demister, so that the gas in the gas stripping storage tank passes through the third demister before flowing to the gas stripping delivery pipe.

[0013] Optionally, the gas stripping storage tank is equipped with filter packing material inside. The filter packing material is located between the connection between the gas output pipe and the gas stripping storage tank and the third demister, so that the gas passes through the filter packing material before flowing to the third demister.

[0014] Optionally, the carbon capture system also includes: Desorption tower; and The lean-rich liquid heat exchanger is connected to the absorbent storage tank via a first input pipe and to the desorption tower via a first output pipe, thereby receiving the absorbent solution after gas stripping treatment and conveying it to the desorption tower. It is also connected to the desorption tower via a second input pipe and to the absorption tower via a second output pipe, thereby receiving the absorbent solution after desorption treatment and conveying it to the absorption tower, and enabling heat exchange between the absorbent solution after gas stripping treatment and the absorbent solution after desorption treatment.

[0015] This invention's carbon capture system connects the absorbent storage tank and the absorption tower via a solution delivery pipe, the stripping gas storage tank and the absorbent storage tank via a stripping gas delivery pipe, the stripping gas purification tank and the absorbent storage tank via a gas receiving pipe, and the stripping gas purification tank and the stripping gas storage tank via a gas output pipe. For absorbent solutions that need to be transported to the desorption tower for desorption, stripping treatment can be performed first in the absorbent storage tank. This involves using stripping gas from the storage tank to remove some oxygen from the absorbent solution, thereby reducing the oxygen content in the absorbent solution transported to the desorption tower. This helps reduce the oxidative degradation reactions that occur during the flow of the absorbent solution to the desorption tower and during desorption within the desorption tower, allowing the absorbent solution to maintain a good carbon dioxide absorption capacity for a longer period. This helps extend the effective cycle life of the absorbent solution, thereby reducing the frequency of absorbent solution replacement and lowering the cost of using the absorbent solution. Simultaneously, it also helps reduce the oxygen impurity content in the carbon dioxide product gas produced by the desorption tower, paving the way for the application of carbon dioxide products. In addition, the mixed gas containing stripping gas flowing out of the absorbent storage tank can be purified in the stripping gas purification tank before being transported to the stripping gas storage tank, thereby realizing the recycling of stripping gas.

[0016] The above and other objects, advantages and features of this utility model will become more apparent to those skilled in the art from the following detailed description of specific embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0017] The following sections will describe some specific embodiments of the present invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings: Figure 1 This is a schematic diagram of a carbon capture system according to an embodiment of the present invention; Figure 2 This is a schematic diagram of an absorbent storage tank in a carbon capture system according to an embodiment of the present invention; Figure 3 This is a schematic diagram of a gas stripping and purification tank in a carbon capture system according to an embodiment of the present invention; Figure 4 This is a schematic diagram of a stripping gas storage tank in a carbon capture system according to an embodiment of the present invention. Detailed Implementation

[0018] Those skilled in the art should understand that the embodiments described below are merely some embodiments of the present invention, and not all embodiments of the present invention. These embodiments are intended to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Based on the embodiments provided by the present invention, all other embodiments obtained by those skilled in the art without creative effort should still fall within the scope of protection of the present invention.

[0019] In the description of this embodiment, 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", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model.

[0020] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can also refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] like Figure 1As shown, in one embodiment, the carbon capture system includes an absorption tower 100, an absorbent storage tank 200, a stripping gas storage tank 300, a stripping gas purification tank 400, a desorption tower 500, and a lean-rich liquid heat exchanger 600. The absorption tower 100 receives the gas to be processed, and its interior is sprayed with an absorbent solution for reacting with the gas. The absorbent storage tank 200 is connected to the absorption tower 100 via a solution delivery pipe 11, thereby receiving the absorbent solution from the absorption tower 100 after reaction with the gas to be processed. The stripping gas storage tank 300 is connected to the absorbent storage tank 200 via a stripping gas delivery pipe 12, thereby supplying stripping gas to the absorbent solution in the absorbent storage tank 200 to extract oxygen from the absorbent solution in the absorbent storage tank 200 using the stripping gas. The gas stripping purification tank 400 is connected to the absorbent storage tank 200 through the gas receiving pipe 13 and to the gas stripping storage tank 300 through the gas output pipe 14, thereby receiving the mixed gas containing gas stripping gas flowing out from the absorbent storage tank 200 and transporting the gas after gas stripping purification treatment to the gas stripping storage tank 300.

[0022] The lean-rich liquid heat exchanger 600 is connected to the absorbent storage tank 200 via a first inlet pipe 21 and to the desorption tower 500 via a first outlet pipe 22, thereby receiving the absorbent solution after stripping gas treatment and conveying it to the desorption tower 500. It is also connected to the desorption tower 500 via a second inlet pipe 23 and to the absorption tower 100 via a second outlet pipe 24, thereby receiving the desorbed absorbent solution and conveying it to the absorption tower 100. This process enables heat exchange between the stripped absorbent solution and the desorbed absorbent solution.

[0023] Reference Figure 1 As shown, specifically, the absorption tower 100 is equipped with a spraying device for spraying the absorbent solution. When the treated gas, such as pretreated flue gas, enters the absorption tower 100, it reacts with the absorbent solution sprayed inside the absorption tower 100, thereby removing carbon dioxide from the treated gas. Furthermore, the absorbent solution after reacting with the treated gas is collected inside the absorption tower 100 and transported to the absorbent storage tank 200 via the solution delivery pipe 11.

[0024] In the absorbent storage tank 200, the stripping gas (such as nitrogen) in the stripping gas storage tank 300 is transported to the absorbent solution via the stripping gas delivery pipe 12, thereby extracting dissolved oxygen from the absorbent solution through stripping. The mixed gas containing the stripping gas then flows into the stripping gas purification tank 400 via the gas receiving pipe 13. In the stripping gas purification tank 400, the mixed gas undergoes stripping gas purification treatment. Specifically, during the stripping treatment of the absorbent solution, in addition to oxygen, a portion of carbon dioxide is also stripped. In one embodiment, the stripping gas purification tank 400 can be used to remove oxygen from the mixed gas. Or, in another embodiment, the stripping gas purification tank 400 can be used to remove carbon dioxide from the mixed gas. The purified gas is then transported to the stripping gas storage tank 300, thereby achieving the recycling of the stripping gas.

[0025] Reference Figure 1 As shown, further, the oxygen content of the absorbent solution in the absorbent storage tank 200 decreases after air stripping. The air-stripped absorbent solution flows into the lean-rich liquid heat exchanger 600 via the first inlet pipe 21, and then enters the desorption tower 500 from the lean-rich liquid heat exchanger 600 via the first outlet pipe 22. In the desorption tower 500, the carbon dioxide absorbed by the absorbent solution is desorbed and can be used or stored later. The desorbed absorbent solution flows into the lean-rich liquid heat exchanger 600 via the second inlet pipe 23, and then is transported to the absorption tower 100 via the second outlet pipe 24, and then sprayed back into the absorption tower 100, realizing the recycling of the absorbent solution. In addition, the absorbent solution flowing into the lean-rich liquid heat exchanger 600 via the first inlet pipe 21 and the absorbent solution flowing into the lean-rich liquid heat exchanger 600 via the second inlet pipe 23 flow in two isolated flow paths in the lean-rich liquid heat exchanger 600, and achieve heat exchange.

[0026] In this embodiment, the absorbent storage tank 200 and the absorption tower 100 are connected by a solution delivery pipe 11, the stripping gas storage tank 300 and the absorbent storage tank 200 are connected by a stripping gas delivery pipe 12, the stripping gas purification tank 400 and the absorbent storage tank 200 are connected by a gas receiving pipe 13, and the stripping gas purification tank 400 and the stripping gas storage tank 300 are connected by a gas output pipe 14. For the absorbent solution that needs to be transported to the desorption tower 500 for desorption, stripping treatment can be performed first in the absorbent storage tank 200. That is, the stripping gas in the stripping gas storage tank 300 is used to remove some of the oxygen from the absorbent solution, thereby reducing the oxygen content in the absorbent solution transported to the desorption tower 500. This helps to reduce the oxidative degradation reactions that occur in the absorbent solution during its flow to and within the desorption tower 500, thus allowing the absorbent solution to maintain a good carbon dioxide absorption capacity for a longer period. This extends the effective cycle life of the absorbent solution, reduces the frequency of replacement, and lowers its operating costs. Simultaneously, it also helps to reduce the oxygen impurity content in the carbon dioxide product gas produced by the desorption tower 500, paving the way for its application. Furthermore, the mixed gas containing stripped gas flowing out of the absorbent storage tank 200 can undergo stripped gas purification in the stripped gas purification tank 400 before being transported to the stripped gas storage tank 300, thereby achieving the recycling of the stripped gas.

[0027] It should be noted that in some other embodiments, the absorbent storage tank and the desorption tower can be directly connected, allowing the absorbent solution after air stripping to be directly transported to the desorption tower. That is, a lean-rich solution heat exchanger is not installed. In other words, the absorbent storage tank and the desorption tower are directly or indirectly connected to transport the absorbent solution after air stripping to the desorption tower.

[0028] like Figure 1 and Figure 2 As shown, in one embodiment, the absorbent storage tank 200 is provided with a first partition plate 210, thereby dividing the internal space of the absorbent storage tank 200 into a first space 201 and a second space 202. A first communication area is provided between the first partition plate 210 and the inner bottom wall of the absorbent storage tank 200, so that the first space 201 and the second space 202 are connected. The connection position of the solution delivery pipe 11 and the absorbent storage tank 200 is located on the top wall of the first space 201. The connection position of the gas receiving pipe 13 and the absorbent storage tank 200 is located on the top wall of the second space 202. The gas lifting gas delivery pipe 12 extends into the second space 202 to deliver gas lifting gas to the absorbent solution located in the second space 202, and the gas lifting gas output position in the second space 202 is higher than the highest point of the first communication area.

[0029] Reference Figure 1 and Figure 2 As shown, specifically, the first partition plate 210 is in sealed contact with the inner top wall and inner side wall of the absorbent storage tank 200, and the bottom side of the first partition plate 210 is spaced from the inner bottom wall of the absorbent storage tank 200, thereby forming a first communicating region. The absorbent solution entering the first space 201 from the top wall of the first space 201 enters the second space 202 from the first communicating region.

[0030] The gas lifting gas delivery pipe 12 delivers gas lifting gas into the second space 202. After the gas lifting gas lifts the absorbent solution, it rises and flows together with the extracted oxygen, flows out of the absorbent storage tank 200 from the top wall of the second space 202, and enters the gas receiving pipe 13.

[0031] By setting the first partition plate 210, the stripped gas and oxygen in the second space 202 are blocked by the first partition plate 210. On the one hand, this helps to prevent the stripped gas and oxygen from entering the first space 201 and then flowing into the absorption tower 100. On the other hand, it allows some of the stripped gas and oxygen to collide with the first partition plate 210 during their upward flow, thereby blocking the liquid carried by the gas and reducing the liquid entrained in the gas entering the gas receiving pipe 13.

[0032] like Figure 1 and Figure 2 As shown, the absorbent storage tank 200 also includes a second partition plate 220. The second partition plate 220 is disposed within the second space 202 and arranged opposite to the first partition plate 210, thereby dividing the second space 202 into two parts: one on the side of the second partition plate 220 facing the first partition plate 210, and the other on the side facing away from the first partition plate 210. A second communication area is provided between the second partition plate 220 and the inner top wall of the absorbent storage tank 200, connecting the portions of the second space 202 located on both sides of the second partition plate 220. The gas extraction outlet within the second space 202 is located between the first partition plate 210 and the second partition plate 220.

[0033] Reference Figure 1 and Figure 2 As shown, the second partition plate 220 is in sealed contact with the inner bottom wall and inner side wall of the absorbent storage tank 200, and the top side of the second partition plate 220 is spaced from the inner top wall of the absorbent storage tank 200, thereby forming a second communicating region. The absorbent solution entering the first space 201 from the top wall of the first space 201 enters the portion of the second space 202 located between the first partition plate 210 and the second partition plate 220 from the first communicating region, and then enters the portion of the second space 202 located on the side of the second partition plate 220 opposite to the first partition plate 210 from the second communicating region.

[0034] The outlet of the absorbent storage tank 200, which is used to output the absorbent solution after air stripping treatment, is located at the bottom of the side wall or bottom wall of the absorbent storage tank 200 on the side of the second partition plate 220 opposite to the first partition plate 210. That is, the connection point between the first input pipeline 21 and the absorbent storage tank 200 is located at the bottom of the side wall or bottom wall of the absorbent storage tank 200 on the side of the second partition plate 220 opposite to the first partition plate 210.

[0035] The airlift output position within the second space 202 is located between the first partition plate 210 and the second partition plate 220. That is, the airlift delivery pipe 12 extends into the second space 202 between the first partition plate 210 and the second partition plate 220.

[0036] In this embodiment, by providing a first partition plate 210 and a second partition plate 220 inside the absorbent storage tank 200, a first connecting area is provided between the first partition plate 210 and the inner bottom wall of the absorbent storage tank 200, and a second connecting area is provided between the second partition plate 220 and the inner top wall of the absorbent storage tank 200, a tortuous flow channel is formed inside the absorbent storage tank 200, which prolongs the flow path of the absorbent solution and helps to increase the reaction time between the gas-lifted gas and the absorbent solution, thereby obtaining a more complete oxygen-lifting effect.

[0037] like Figure 1 and Figure 2 As shown, a first demister 230 is installed at the top of the second space 202, so that the gas lifter in the absorbent storage tank 200 passes through the first demister 230 before flowing to the gas receiving pipe 13. Specifically, the first demister 230 divides the second space 202 into upper and lower parts, with the gas lifter output located in the lower part. This ensures that the gas lifter and the extracted oxygen must pass through the first demister 230 before flowing to the gas receiving pipe 13, thereby removing absorbent droplets carried in the gas and reducing absorbent waste.

[0038] like Figure 1 and Figure 2 As shown, a return gas pipe 15 is also provided between the absorption tower 100 and the absorbent storage tank 200. The connection between the return gas pipe 15 and the absorbent storage tank 200 is located on the top wall of the first space 201. The return gas pipe 15 is used to return a portion of the gas carried by the absorbent solution from the absorption tower 100 back to the absorption tower 100. Specifically, the processed gas in the absorption tower 100 enters the absorbent storage tank 200 along with the absorbent solution. Then, the return gas pipe 15 can be used to draw the processed gas that has entered the absorbent storage tank 200 back into the absorption tower 100. Moreover, because of the presence of the first partition plate 210, the return gas pipe 15 will not draw away the gas stripping gas, and the gas receiving pipe 13 will not draw away the processed gas, which helps to avoid waste of gas stripping gas and avoid contamination of the gas stripping gas.

[0039] Although not shown in the figure, in one embodiment, the first partition plate and / or the second partition plate are plate-like structures that zigzag along the longitudinal direction, such as wavy plate-like structures or sawtooth plate-like structures. The above-mentioned structure helps to increase the probability of collision between the gas and the first partition plate and the second partition plate during the upward flow of the gas lifter, thereby blocking the liquid carried by the gas and reducing the liquid entrained in the gas entering the gas receiving pipe.

[0040] like Figure 1 and Figure 3 As shown, the gas extraction and purification tank 400 is equipped with a second demister 410, so that the gas in the gas extraction and purification tank 400 passes through the second demister 410 before flowing to the gas output pipe 14. Specifically, the connection point between the gas receiving pipe 13 and the gas extraction and purification tank 400 is located on the side of the gas extraction and purification tank 400 near the bottom, and the connection point between the gas output pipe 14 and the gas extraction and purification tank 400 is located at the top of the gas extraction and purification tank 400. The gas extraction and purification tank 400 can use a solvent to perform gas extraction and purification treatment on the gas from the gas receiving pipe 13, such as using a solvent that covers the connection point between the gas receiving pipe 13 and the gas extraction and purification tank 400. Alternatively, it can use a solid reagent to perform gas extraction and purification treatment on the gas from the gas receiving pipe 13. Before flowing to the gas output pipe 14, the gas purified by the gas stripping process passes through the second demister 410. The second demister 410 can remove liquid droplets or solid particles carried in the gas, thereby preventing the gas stripping gas from carrying liquid droplets or solid particles to the gas stripping gas storage tank 300 and then to the absorbent solution, which would contaminate the absorbent solution.

[0041] like Figures 1 to 4 As shown, a third demister 310 is provided inside the stripped gas storage tank 300, so that the stripped gas flowing into the storage tank 300 via the gas output pipe 14 passes through the third demister 310 before flowing into the stripped gas delivery pipe 12. The connection point between the gas output pipe 14 and the storage tank 300 is located on the side of the storage tank 300 near the bottom, and the connection point between the stripped gas delivery pipe 12 and the storage tank 300 is located at the top of the storage tank 300. The third demister 310 can reduce the amount of droplets and particles entrained in the stripped gas flowing into the delivery pipe 12, improve the quality of the stripped gas, and avoid contamination of the absorbent solution.

[0042] like Figures 1 to 4As shown, the stripped gas storage tank 300 is further equipped with a filter media 320. The filter media 320 is positioned between the connection point of the gas output pipe 14 and the stripped gas storage tank 300 and the third demister 310, allowing the gas to pass through the filter media 320 before flowing to the third demister 310. In other words, the gas flowing from the stripped gas storage tank 300 to the stripped gas delivery pipe 12 first passes through the filter media 320 (such as structured packing or wire mesh packing), initially filtering out some droplets and particles. The third demister 310 then further filters out some droplets and particles, improving the purification effect on the stripped gas.

[0043] It should be noted that the gas storage tank 300 can be used to further purify the gas from the gas purification tank 400, such as by placing solid reagents for gas purification in the gas storage tank 300 or filling it with solvents that cover the gas output pipe 14. For example, carbon dioxide can be removed from the mixed gas containing the gas first in the gas purification tank 400, and then oxygen can be removed from the mixed gas containing the gas first in the gas storage tank 300.

[0044] Therefore, those skilled in the art should recognize that although many exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications conforming to the principles of the present invention can be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all such other variations or modifications.

Claims

1. A carbon capture system, characterized in that, include: An absorption tower is used to receive and process gases, and its interior is sprayed with an absorbent solution to react with the gas. An absorbent storage tank is connected to the absorption tower via a solution delivery pipe, thereby receiving the absorbent solution that has reacted with the treated gas in the absorption tower; The gas extraction gas storage tank is connected to the absorbent storage tank via a gas extraction gas delivery pipe, thereby delivering gas extraction gas to the absorbent solution in the absorbent storage tank to extract oxygen gas from the absorbent solution in the absorbent storage tank using the gas extraction gas. and The gas stripping purification tank is connected to the absorbent storage tank via a gas receiving pipe and to the gas stripping gas storage tank via a gas output pipe, thereby receiving the mixed gas containing gas stripping gas flowing out of the absorbent storage tank and transporting the gas purified by the gas stripping gas to the gas stripping gas storage tank.

2. The carbon capture system according to claim 1, characterized in that... The absorbent storage tank is provided with a first partition plate, thereby dividing the internal space of the absorbent storage tank into a first space and a second space; A first communication area is provided between the first partition plate and the inner bottom wall of the absorbent storage tank, so that the first space and the second space are connected. The connection point between the solution delivery pipe and the absorbent storage tank is located on the top wall of the first space, and the connection point between the gas receiving pipe and the absorbent storage tank is located on the top wall of the second space. The gas lift delivery pipe extends into the second space to deliver gas lift gas to the absorbent solution located in the second space, and the gas lift gas output position in the second space is higher than the highest point of the first connecting area.

3. The carbon capture system according to claim 2, characterized in that... The absorbent storage tank is also provided with a second partition plate, which is arranged in the second space and opposite to the first partition plate, thereby dividing the second space into two parts: one part located on the side of the second partition plate facing the first partition plate and the other part located on the side away from the first partition plate. A second communication area is provided between the second partition plate and the inner top wall of the absorbent storage tank, so that the portions of the second space located on both sides of the second partition plate are connected. The air extraction outlet in the second space is located between the first partition plate and the second partition plate.

4. The carbon capture system according to claim 3, characterized in that... A first demisting device is provided at the top of the second space, so that the gas lift-up flow in the absorbent storage tank passes through the first demisting device before flowing to the gas receiving pipe.

5. The carbon capture system according to claim 3, characterized in that... The first partition plate and / or the second partition plate are plate-like structures that zigzag along the longitudinal direction.

6. The carbon capture system according to claim 3, characterized in that... A return gas pipe is also provided between the absorption tower and the absorbent storage tank. The connection between the return gas pipe and the absorbent storage tank is located on the top wall of the first space. The return gas pipe is used to return a portion of the gas carried by the absorbent solution from the absorption tower back to the absorption tower.

7. The carbon capture system according to claim 1, characterized in that... The gas extraction and purification tank is equipped with a second demister, so that the gas in the gas extraction and purification tank passes through the second demister before flowing to the gas output pipe.

8. The carbon capture system according to claim 7, characterized in that... The gas stripping storage tank is equipped with a third demister, so that the gas in the gas stripping storage tank passes through the third demister before flowing to the gas stripping delivery pipe.

9. The carbon capture system according to claim 8, characterized in that... The gas stripping storage tank is equipped with filter packing material inside. The filter packing material is located between the connection between the gas output pipe and the gas stripping storage tank and the third demister, so that the gas passes through the filter packing material before flowing to the third demister.

10. The carbon capture system according to claim 1, characterized in that, Also includes: Desorption tower; and The lean-rich liquid heat exchanger is connected to the absorbent storage tank via a first input pipe and to the desorption tower via a first output pipe, thereby receiving the absorbent solution after gas stripping treatment and conveying it to the desorption tower. It is also connected to the desorption tower via a second input pipe and to the absorption tower via a second output pipe, thereby receiving the absorbent solution after desorption treatment and conveying it to the absorption tower, and enabling heat exchange between the absorbent solution after gas stripping treatment and the absorbent solution after desorption treatment.

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