Carbon dioxide capture and regeneration system

Abstract

The application provides a carbon dioxide capturing and regenerating system, which comprises a capturing device and a regenerating device which are connected, and the capturing device comprises: a first base body provided with a capturing cavity; a first inlet arranged at the lower end of the first base body and communicated with the capturing cavity; a first plate heat exchange structure arranged in the capturing cavity to cool flue gas; a liquid distribution structure arranged in the capturing cavity and above the first plate heat exchange structure to input capturing liquid into the capturing cavity; a second plate heat exchange structure arranged in the capturing cavity and between the liquid distribution structure and the first plate heat exchange structure to cool flue gas and capturing liquid; an isolation structure arranged in the capturing cavity and between the second plate heat exchange structure and the first plate heat exchange structure to isolate saturated liquid and the first plate heat exchange structure; and a first outlet arranged at the lower end of the first base body. The technical scheme of the application can effectively solve the problem of low carbon dioxide capturing rate in flue gas in the related art.

Description

Technical Field

[0001] The present invention relates to the technical field of carbon dioxide processing, and in particular to a carbon dioxide capture and regeneration system. Background Art

[0002] Carbon dioxide (CO2) is one of the main components of greenhouse gases that cause global warming. Therefore, capturing and recycling emitted carbon dioxide has the dual benefits of environmental protection and energy conservation. There are many technical routes for carbon capture, among which the amine absorption method is widely used in thermal power units.

[0003] In the carbon dioxide capture and regeneration system, after the capture agent liquid enters the absorption tower, it will react with the carbon dioxide in the flue gas and then absorb the carbon dioxide in the flue gas to form a saturated liquid. This process is a heat-generating process. When the temperature in the absorption tower is high, it will be unfavorable for the absorption of carbon dioxide in the flue gas, resulting in a low carbon dioxide capture rate. Summary of the Invention

[0004] The main purpose of the present invention is to provide a carbon dioxide capture and regeneration system to solve the problem of low capture rate of carbon dioxide in flue gas in the related art.

[0005] To achieve the above-mentioned objectives, the present invention provides a carbon dioxide capture and regeneration system, comprising a capture device and a regeneration device which are connected to each other, the capture device comprising: a first substrate having a capture chamber; a first inlet arranged at the lower end of the first substrate and connected to the capture chamber to introduce flue gas into the capture chamber; a first plate heat exchange structure arranged in the capture chamber to cool the flue gas; a liquid distribution structure arranged in the capture chamber and located above the first plate heat exchange structure to input a capture liquid into the capture chamber, the capture liquid being able to capture carbon dioxide in the flue gas and form a saturated liquid; a second plate heat exchange structure arranged in the capture chamber and located between the liquid distribution structure and the first plate heat exchange structure to cool the flue gas and the capture liquid; an isolation structure arranged in the capture chamber and located between the second plate heat exchange structure and the first plate heat exchange structure to isolate the saturated liquid from the first plate heat exchange structure; and a first outlet arranged at the lower end of the first substrate to discharge the saturated liquid.

[0006] Furthermore, the isolation structure includes a collecting member and a guide member, the upper end of the guide member is connected to the collecting member, the lower end of the guide member is a free end and is located below the first plate heat exchange structure, and the saturated liquid flows to the first outlet through the collecting member and the guide member.

[0007] Furthermore, the collecting member includes a water bucket, the guide member includes a guide pipe, the upper end of the guide pipe is connected to the lower end of the water bucket, the lower end of the guide pipe forms the lower end of the guide member, and the first plate heat exchange structure includes a plurality of first heat exchange plates extending in the vertical direction, and the plurality of first heat exchange plates are arranged at intervals on the outer periphery of the guide pipe along the circumferential direction of the guide pipe, and each first heat exchange plate has a first flow channel for circulating the cooling medium.

[0008] Furthermore, the first heat exchange plate is a rectangular plate structure and has a first inlet and a first outlet connected to the first flow channel. The cooling medium enters the first flow channel from the first inlet and is discharged to the outside of the first heat exchange plate from the first outlet. The first inlet is located at the first corner and the first outlet is located at the second corner, wherein the first corner is the corner of the first heat exchange plate close to the top and close to the outside, and the second corner is the corner of the first heat exchange plate close to the bottom and close to the inside.

[0009] Furthermore, a plurality of air holes are provided through the water bucket, and a plurality of water retaining parts are provided corresponding to the plurality of air holes. The water retaining parts include an air pipe, a hollow bracket and a water retaining cap. The water retaining cap is connected to the upper end of the air pipe through the hollow bracket, and the lower end of the air pipe is connected to the corresponding air holes.

[0010] Furthermore, the second plate heat exchange structure includes a plurality of second heat exchange plates extending in the vertical direction, the plurality of second heat exchange plates are spaced apart in the transverse direction, and each second heat exchange plate has a second flow channel for circulating the cooling medium.

[0011] Furthermore, the second heat exchange plate has a second inlet and a second outlet connected to the second flow channel. The cooling medium enters the second flow channel from the second inlet and is discharged to the outside of the second heat exchange plate from the second outlet. The second heat exchange plate includes a scraper structure rotatably arranged at the second outlet, and the scraper structure can rotate under the drive of the cooling medium.

[0012] Furthermore, the second heat exchange plate also includes an outlet pipe arranged at the second outlet, and a scraper structure is arranged in the outlet pipe. The scraper structure includes a rotating rod, a connecting rod, a water wheel and a scraper. The rotating rod extends along the axial direction of the outlet pipe and is rotatably arranged. The water wheel is arranged at one end of the rotating rod and can rotate under the action of the cooling medium to drive the rotating rod to rotate. The scraper is arranged close to the inner surface of the outlet pipe, and the connecting rod is connected between the rotating rod and the scraper.

[0013] Furthermore, the regeneration device includes a second base and a third plate heat exchange structure, the second base has a regeneration chamber, the regeneration device includes a second inlet and a second outlet, the second inlet is arranged at the upper end of the second base and is connected to the regeneration chamber to introduce saturated liquid into the regeneration chamber, the third plate heat exchange structure is arranged in the regeneration chamber and can heat the saturated liquid so that the saturated liquid becomes a capture liquid, and the second outlet is arranged at the lower end of the second base and is connected to the regeneration chamber to discharge the capture liquid from the regeneration chamber.

[0014] Furthermore, the regeneration device also includes a fourth plate heat exchange structure, which is located above the third plate heat exchange structure. The fourth plate heat exchange structure can heat the saturated liquid, and the outlet of the third plate heat exchange structure is connected to the inlet of the fourth plate heat exchange structure.

[0015] Applying the technical solution of the present invention, the carbon dioxide capture and regeneration system includes a capture device for capturing carbon dioxide in flue gas and a regeneration device for releasing carbon dioxide again. The first inlet is arranged at the lower end of the first substrate and is connected to the capture chamber to introduce flue gas into the capture chamber. The flue gas flows upward from the lower end of the capture chamber. The first plate heat exchange structure is arranged in the capture chamber. The flue gas will pass through the first plate heat exchange structure during the upward flow. The first plate heat exchange structure can perform preliminary cooling of the flue gas, thereby reducing the temperature of the flue gas itself. The liquid distribution structure is arranged in the capture chamber and is located above the first plate heat exchange structure to input capture liquid into the capture chamber. The capture liquid flows toward the lower end of the capture chamber. The capture liquid can capture carbon dioxide in the flue gas and form a saturated liquid to complete the capture of carbon dioxide in the flue gas. The second plate heat exchange structure is arranged in the capture chamber and is located between the liquid distribution structure and the first plate heat exchange structure to complete the capture of carbon dioxide in the flue gas. The flue gas and the capture liquid are cooled, and the second plate heat exchange structure can perform secondary cooling on the flue gas and the capture liquid to achieve a higher capture rate of carbon dioxide in the flue gas. Through the cooperation of the first plate heat exchange structure and the second plate heat exchange structure, the former alone reduces the temperature of the flue gas, while the latter reduces the temperature of the flue gas and the capture liquid, thereby keeping the temperatures of the flue gas and the capture liquid relatively low, thereby ensuring the absorption of carbon dioxide by the capture liquid. The isolation structure is arranged in the capture chamber and located between the second plate heat exchange structure and the first plate heat exchange structure to isolate the saturated liquid from the first plate heat exchange structure, so that the saturated liquid does not need to flow through the first plate heat exchange structure, thereby avoiding the first plate heat exchange structure from cooling the saturated liquid again, thereby enabling the first plate heat exchange structure to sufficiently cool the flue gas and avoiding waste of the cooling capacity of the first plate heat exchange structure. The first outlet is arranged at the lower end of the first base and discharges the saturated liquid. Therefore, the technical solution of the present application can effectively solve the problem of low capture rate of carbon dioxide in flue gas in the related art. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 A schematic cross-sectional view of a capture device according to an embodiment of a carbon dioxide capture and regeneration system of the present invention is shown;

[0018] Figure 2 Shown Figure 1 An enlarged schematic diagram of the capture device at A;

[0019] Figure 3 Shown Figure 1 A schematic cross-sectional view of a partial structure of a second heat exchange plate of a capture device;

[0020] Figure 4 Shown Figure 1 Schematic cross-sectional view of the regeneration device of the carbon dioxide capture and regeneration system.

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

[0022] 1. Capture device; 2. Regeneration device;

[0023] 10. First substrate; 11. Capturing chamber;

[0024] 20. First import;

[0025] 30. First plate heat exchange structure; 31. First heat exchange plate;

[0026] 40. Liquid distribution structure;

[0027] 50. Second plate heat exchange structure; 51. Second heat exchange plate; 511. Outlet pipe; 52. Second flow channel; 53. Scraper structure; 531. Rotating rod; 532. Connecting rod; 533. Water wheel; 534. Scraper;

[0028] 60. Isolation structure; 61. Collecting element; 611. Water bucket; 612. Air hole; 613. Water retaining element; 6131. ​​Air pipe; 6132. Hollow bracket; 6134. Water retaining cap; 62. Flow guide; 621. Flow guide pipe;

[0029] 70. First Exit;

[0030] 80. Second substrate; 81. Regeneration chamber;

[0031] 90. The third plate heat exchange structure;

[0032] 100, second import;

[0033] 110, Second Exit;

[0034] 120. The fourth plate heat exchange structure. DETAILED DESCRIPTION

[0035] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0037] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments can have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0038] like Figures 1 to 3As shown, the present application provides a carbon dioxide capture and regeneration system. An embodiment of the carbon dioxide capture and regeneration system of the present application includes a capture device 1 and a regeneration device 2 that are connected and arranged in communication. The capture device 1 includes: a first base 10, a first inlet 20, a first plate heat exchange structure 30, a liquid distribution structure 40, a second plate heat exchange structure 50, an isolation structure 60, and a first outlet 70; the first base 10 has a capture chamber 11; the first inlet 20 is arranged at the lower end of the first base 10 and is connected to the capture chamber 11 to allow flue gas to enter the capture chamber 11; the first plate heat exchange structure 30 is arranged in the capture chamber 11 to cool the flue gas. ; The liquid distribution structure 40 is arranged in the capture chamber 11 and is located above the first plate heat exchange structure 30 to input the capture liquid into the capture chamber 11 to capture the carbon dioxide in the flue gas and form a saturated liquid; the second plate heat exchange structure 50 is arranged in the capture chamber 11 and is located between the liquid distribution structure 40 and the first plate heat exchange structure 30 to cool the flue gas and the capture liquid; the isolation structure 60 is arranged in the capture chamber 11 and is located between the second plate heat exchange structure 50 and the first plate heat exchange structure 30 to isolate the saturated liquid and the first plate heat exchange structure 30; the first outlet 70 is arranged at the lower end of the first base 10 and discharges the saturated liquid.

[0039] The technical solution of this embodiment is applied, and the carbon dioxide capture and regeneration system includes a capture device 1 for capturing carbon dioxide in flue gas and a regeneration device 2 for releasing carbon dioxide again. The first inlet 20 is arranged at the lower end of the first base 10 and is connected to the capture chamber 11 to allow flue gas to enter the capture chamber 11. The flue gas flows upward from the lower end of the capture chamber 11. The first plate heat exchange structure 30 is arranged in the capture chamber 11. The flue gas passes through the first plate heat exchange structure 30 during the upward flow. The first plate heat exchange structure 30 can preliminarily cool the flue gas, thereby reducing the temperature of the flue gas itself. The liquid distribution structure 40 is arranged in the capture chamber 11 and is located above the first plate heat exchange structure 30 to input the capture liquid into the capture chamber 11. The capture liquid flows toward the lower end of the capture chamber 11. The capture liquid can capture carbon dioxide in the flue gas and form a saturated liquid to complete the capture of carbon dioxide in the flue gas. The second plate heat exchange structure 50 is arranged in the capture chamber 11 and is located between the liquid distribution structure 40 and the first plate heat exchange structure 30. The second plate heat exchange structure 50 can cool the flue gas and the capture liquid for a second time, so that the capture rate of carbon dioxide in the flue gas is higher. Through the cooperation of the first plate heat exchange structure 30 and the second plate heat exchange structure 50, the former reduces the temperature of the flue gas alone, and the latter reduces the temperature of the flue gas and the capture liquid, so that the temperature of the flue gas and the capture liquid are relatively low, thereby ensuring the absorption of carbon dioxide by the capture liquid. The isolation structure 60 is arranged in the capture chamber 11 and is located between the second plate heat exchange structure 50 and the first plate heat exchange structure 30 to isolate the saturated liquid and the first plate heat exchange structure 30, so that the saturated liquid does not need to flow through the first plate heat exchange structure 30, thereby avoiding the first plate heat exchange structure 30 to cool the saturated liquid again, so that the first plate heat exchange structure 30 can cool the flue gas sufficiently, avoiding the waste of the cooling capacity of the first plate heat exchange structure 30. The first outlet 70 is arranged at the lower end of the first base 10 and discharges the saturated liquid. Therefore, the technical solution of this embodiment can effectively solve the problem of low capture rate of carbon dioxide in flue gas in the related art.

[0040] It should be noted that, in this embodiment, the liquid distribution structure 40 includes a plurality of nozzles, which can spray the capture liquid into the capture chamber 11 .

[0041] like Figure 1As shown, the isolation structure 60 includes a collecting member 61 and a flow guide 62. The upper end of the flow guide 62 is connected to the collecting member 61, and the lower end of the flow guide 62 is a free end and is located below the first plate heat exchange structure 30. The saturated liquid flows through the collecting member 61 and the flow guide 62 to the first outlet 70. Specifically, the collecting member 61 is used to collect the saturated liquid after flowing through the second plate heat exchange structure 50. The flow guide 62 can guide the saturated liquid collected by the collecting member 61 to the first outlet 70, so that the saturated liquid can be discharged to the outside of the capture chamber 11 through the first outlet 70.

[0042] like Figure 1 As shown, the collecting member 61 includes a hopper 611, and the flow guide 62 includes a flow guide tube 621. The upper end of the flow guide tube 621 is connected to the lower end of the hopper 611, and the lower end of the flow guide tube 621 forms the lower end of the flow guide 62. The first plate heat exchange structure 30 includes multiple first heat exchange plates 31 extending vertically. The multiple first heat exchange plates 31 are spaced apart along the circumference of the flow guide tube 621. Each first heat exchange plate 31 has a first flow channel for circulating the cooling medium. Specifically, the hopper 611 and flow guide tube 621 have the advantages of simple structure and low cost. The gap between two adjacent first heat exchange plates 31 allows flue gas to flow through, allowing the flue gas to exchange heat with the cooling medium flowing within the first heat exchange plates 31, thereby achieving a cooling effect on the flue gas. The multiple first heat exchange plates 31 arranged around the flow guide tube 621 effectively isolate the first heat exchange plates 31 from the saturated liquid.

[0043] like Figure 1 As shown, the first heat exchange plate 31 is a rectangular plate-shaped structure having a first inlet and a first outlet connected to the first flow channel. The cooling medium enters the first flow channel through the first inlet and is discharged to the outside of the first heat exchange plate 31 through the first outlet. The first inlet is located at the first corner, and the first outlet is located at the second corner. The first corner is the corner of the first heat exchange plate 31 close to the top and the outside, and the second corner is the corner of the first heat exchange plate 31 close to the bottom and the inside. It should be noted that "close to the inside" refers to the direction close to the guide tube 621, and "close to the outside" refers to the direction away from the guide tube 621. This configuration ensures that the cooling medium has a sufficiently long path through the first flow channel, thereby allowing the cooling medium to exchange heat with the flue gas for a sufficient period of time, thereby ensuring a cooling effect on the flue gas.

[0044] like Figure 1 as well as Figure 2As shown, a plurality of air holes 612 are provided through the hopper 611, and a plurality of water retaining members 613 are provided corresponding to the air holes 612. The water retaining members 613 include an air pipe 6131, a hollow bracket 6132, and a water retaining cap 6133. The water retaining cap 6133 is connected to the upper end of the air pipe 6131 through the hollow bracket 6132, and the lower end of the air pipe 6131 is connected to the corresponding air holes 612. Specifically, the air holes 612 are used to pass flue gas, so that the cooled flue gas can reach the top of the hopper 611. The water retaining members 613 can block the saturated liquid, preventing the saturated liquid from passing through the air holes 612 and reaching the area of ​​the first plate heat exchange structure 30.

[0045] like Figure 1 As shown, the second plate heat exchange structure 50 includes multiple second heat exchange plates 51 extending vertically. These plates 51 are spaced apart transversely, and each plate 51 has a second flow channel 52 for circulating the cooling medium. Specifically, a gap is provided between adjacent second heat exchange plates 51, allowing flue gas and captured liquid to pass through, thereby cooling the flue gas and captured liquid. The multiple second heat exchange plates 51 can effectively cool the flue gas and captured liquid.

[0046] like Figure 1 As shown, the second heat exchange plate 51 has a second inlet and a second outlet connected to the second flow channel 52. The cooling medium enters the second flow channel 52 through the second inlet and is discharged to the outside of the second heat exchange plate 51 through the second outlet. The second heat exchange plate 51 includes a scraper structure 53 rotatably disposed at the second outlet. The scraper structure 53 can rotate under the drive of the cooling medium. Specifically, in this embodiment, the cooling medium is relatively low-temperature water. Ordinary water may contain a high content of substances such as calcium carbonate. When the second heat exchange plate 51 is performing heat exchange, the water temperature increases due to the heat exchange, resulting in a high precipitation rate of substances such as calcium carbonate in the water, thereby forming scale at the second outlet. The accumulation of scale can easily block the second outlet, which may cause blockage of the second flow channel 52. The scraper structure can scrape off the scale, thereby preventing blockage of the second flow channel 52. In addition, in this embodiment, the first heat exchange plate 31 also has a similar structure.

[0047] like Figure 3As shown, the second heat exchange plate 51 also includes an outlet pipe 511 arranged at the second outlet, and a scraper structure 53 is arranged in the outlet pipe 511. The scraper structure 53 includes a rotating rod 531, a connecting rod 532, a water wheel 533 and a scraper 534. The rotating rod 531 extends along the axial direction of the outlet pipe 511 and is rotatably arranged. The water wheel 533 is arranged at one end of the rotating rod 531 and can rotate under the action of the cooling medium to drive the rotating rod 531 to rotate. The scraper 534 is arranged close to the inner surface of the outlet pipe 511, and the connecting rod 532 is connected between the rotating rod 531 and the scraper 534.

[0048] like Figure 4 As shown, the regeneration device 2 includes a second base 80 and a third plate heat exchange structure 90. The second base 80 has a regeneration chamber 81. The regeneration device 2 includes a second inlet 100 and a second outlet 110. The second inlet 100 is disposed at the upper end of the second base 80 and communicates with the regeneration chamber 81 to introduce saturated liquid into the regeneration chamber 81. The third plate heat exchange structure 90 is disposed in the regeneration chamber 81 and is capable of heating the saturated liquid to convert it into a capture liquid. The second outlet 110 is disposed at the lower end of the second base 80 and communicates with the regeneration chamber 81 to discharge the capture liquid from the regeneration chamber 81. Specifically, the third plate heat exchange structure 90 is capable of heating the saturated liquid, thereby releasing carbon dioxide in the saturated liquid, which in turn converts the saturated liquid into a capture liquid, thereby achieving recycling of the saturated liquid and the capture liquid.

[0049] like Figure 4 As shown, the regeneration device 2 further includes a fourth plate heat exchange structure 120, which is located above the third plate heat exchange structure 90. The fourth plate heat exchange structure 120 is capable of heating the saturated liquid, and the outlet of the third plate heat exchange structure 90 is connected to the inlet of the fourth plate heat exchange structure 120. Specifically, the third plate heat exchange structure 90 and the fourth plate heat exchange structure 120 both utilize a heating medium flowing through them to heat the saturated liquid. The energy of the heating medium is high when flowing through the third plate heat exchange structure 90, while the energy of the heating medium is low when flowing through the fourth plate heat exchange structure 120. This configuration enables the fourth plate heat exchange structure 120 to first preheat the saturated liquid using the heating medium with low energy, and then pass the saturated liquid through the third plate heat exchange structure 90, thereby better releasing carbon dioxide, thereby achieving full release of carbon dioxide and making maximum use of the energy contained in the heating medium.

[0050] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0051] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0052] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0053] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A carbon dioxide capture and regeneration system, comprising a capture device (1) and a regeneration device (2) connected to each other, characterized in that: The capture device (1) comprises: A first substrate (10) having a capture cavity (11); A first inlet (20) is provided at the lower end of the first base body (10) and is in communication with the collecting chamber (11) so as to introduce smoke into the collecting chamber (11); A first plate-type heat exchange structure (30) is arranged in the collection chamber (11) to cool the flue gas; a liquid distribution structure (40) disposed in the capture chamber (11) and located above the first plate-type heat exchange structure (30) to input a capture liquid into the capture chamber (11), wherein the capture liquid is capable of capturing carbon dioxide in the flue gas and forming a saturated liquid; a second plate heat exchange structure (50) disposed in the collection chamber (11) and located between the liquid distribution structure (40) and the first plate heat exchange structure (30) to cool the flue gas and the collection liquid; an isolation structure (60) disposed in the capture chamber (11) and located between the second plate heat exchange structure (50) and the first plate heat exchange structure (30) to isolate the saturated liquid from the first plate heat exchange structure (30); a first outlet (70), provided at the lower end of the first substrate (10) and configured to discharge the saturated liquid; The isolation structure (60) comprises a collecting member (61) and a flow guide member (62); the upper end of the flow guide member (62) is in communication with the collecting member (61); the lower end of the flow guide member (62) is a free end and is located below the first plate heat exchange structure (30); the saturated liquid flows to the first outlet (70) via the collecting member (61) and the flow guide member (62); The collecting member (61) includes a water bucket (611), the flow guide member (62) includes a flow guide pipe (621), the upper end of the flow guide pipe (621) is communicated with the lower end of the water bucket (611), and the lower end of the flow guide pipe (621) forms the lower end of the flow guide member (62), the first plate heat exchange structure (30) includes a plurality of first heat exchange plates (31) extending in a vertical direction, the plurality of first heat exchange plates (31) are arranged at intervals on the outer periphery of the flow guide pipe (621) along the circumferential direction of the flow guide pipe (621), and each of the first heat exchange plates (31) has a first flow passage for circulating a cooling medium; The water bucket (611) is provided with a plurality of air holes (612) extending therethrough, and a plurality of water retaining members (613) are provided in a one-to-one correspondence with the plurality of air holes (612); The regeneration device (2) comprises a second base (80), a third plate heat exchange structure (90) and a fourth plate heat exchange structure (120), wherein the fourth plate heat exchange structure (120) is located above the third plate heat exchange structure (90), and the fourth plate heat exchange structure (120) is capable of heating the saturated liquid, and the outlet of the third plate heat exchange structure (90) is connected to the inlet of the fourth plate heat exchange structure (120).

2. The carbon dioxide capture and regeneration system according to claim 1, characterized in that: The first heat exchange plate (31) is a rectangular plate-shaped structure and has a first inlet and a first outlet communicated with the first flow channel. The cooling medium enters the first flow channel from the first inlet and is discharged to the outside of the first heat exchange plate (31) from the first outlet. The first inlet is located at a first corner, and the first outlet is located at a second corner. The first corner is the corner of the first heat exchange plate (31) close to the top and the outside, and the second corner is the corner of the first heat exchange plate (31) close to the bottom and the inside.

3. The carbon dioxide capture and regeneration system according to claim 1, characterized in that: The water retaining member (613) comprises an air passage (6131), a hollow bracket (6132) and a water retaining cap (6133); the water retaining cap (6133) is connected to the upper end of the air passage (6131) via the hollow bracket (6132); and the lower end of the air passage (6131) is in communication with the corresponding air hole (612).

4. The carbon dioxide capture and regeneration system according to any one of claims 1 to 3, characterized in that: The second plate heat exchange structure (50) comprises a plurality of second heat exchange plates (51) extending in the vertical direction, the plurality of second heat exchange plates (51) being arranged at intervals in the transverse direction, and each second heat exchange plate (51) having a second flow passage (52) for circulating the cooling medium.

5. The carbon dioxide capture and regeneration system according to claim 4, characterized in that: The second heat exchange plate (51) has a second inlet and a second outlet communicated with the second flow channel (52); the cooling medium enters the second flow channel (52) from the second inlet and is discharged to the outside of the second heat exchange plate (51) from the second outlet; the second heat exchange plate (51) includes a scraper structure (53) rotatably arranged at the second outlet; the scraper structure (53) is rotatable under the drive of the cooling medium.

6. The carbon dioxide capture and regeneration system according to claim 5, characterized in that: The second heat exchange plate (51) further includes an outlet pipe (511) arranged at the second outlet, the scraper structure (53) is arranged in the outlet pipe (511), and the scraper structure (53) includes a rotating rod (531), a connecting rod (532), a water wheel (533) and a scraper (534). The rotating rod (531) extends along the axial direction of the outlet pipe (511) and is rotatably arranged. The water wheel (533) is arranged at one end of the rotating rod (531) and can rotate under the action of the cooling medium to drive the rotating rod (531) to rotate. The scraper (534) is arranged close to the inner surface of the outlet pipe (511), and the connecting rod (532) is connected between the rotating rod (531) and the scraper (534).

7. The carbon dioxide capture and regeneration system according to any one of claims 1 to 3, characterized in that: The second base (80) has a regeneration chamber (81), and the regeneration device (2) includes a second inlet (100) and a second outlet (110). The second inlet (100) is arranged at the upper end of the second base (80) and communicates with the regeneration chamber (81) to allow the saturated liquid to be introduced into the regeneration chamber (81). The third plate heat exchange structure (90) is arranged in the regeneration chamber (81) and is capable of heating the saturated liquid so that the saturated liquid becomes the captured liquid. The second outlet (110) is arranged at the lower end of the second base (80) and communicates with the regeneration chamber (81) to discharge the captured liquid from the regeneration chamber (81).

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