A single column carbon dioxide intensifier absorption device

Abstract

This invention relates to a single-tower carbon dioxide absorption device for enhanced efficiency, comprising an absorption tower and a collection unit. The collection unit includes a spray assembly, a liquid inlet pipe, and a liquid-holding layer. The spray assembly is located inside the absorption tower, and the liquid inlet pipe is connected to the spray assembly to supply absorbent. The spray assembly is positioned above the liquid-holding layer. The liquid-holding layer includes a liquid-holding plate on the inner wall of the absorption tower. The liquid-holding plate has multiple liquid inlets along the radial direction of the absorption tower, and each liquid inlet has a liquid-holding element below it, which is installed on the lower end face of the liquid-holding plate. The multiple liquid-holding elements face the same direction. An air passage is formed between two adjacent liquid-holding elements, and the air passage is connected to the liquid inlet. The air inlet of the air passage is partially or completely offset from the liquid inlet. This invention can optimize the absorption of carbon dioxide by addressing common problems such as the low concentration of carbon dioxide in flue gas from coal-fired power plants and the high energy consumption and low efficiency of packed towers in existing demonstration projects, resulting in a high and stable carbon dioxide absorption rate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of carbon dioxide absorption, in particular to a single-tower carbon dioxide synergistic absorption device. BACKGROUND

[0002] Due to the influence of wind, light, water distribution, time and season, the new energy power generation system has instability, which has a great influence on the stable operation of the power grid. Therefore, coal-fired power generation will also play a "bottom" role in stable energy supply in the future. The coal-fired power plant that provides protection for stable supply will carry out carbon capture process. This technology is recognized as an effective way and only choice for reducing carbon emissions of coal-fired power generation enterprises. The post-combustion capture technology is widely concerned due to its small modification range for existing power generation equipment and wide adaptation to flue gas conditions.

[0003] The mainstream technology of post-combustion capture technology is amine decarburization technology. The absorption tower part mainly uses baffle, regular packing or bulk packing tower to achieve it. The baffle is widely used in the chemical industry and has good removal effect, but the carbon dioxide concentration in the main gas source is high. The regular packing has good flue gas conditions, but it is generally suitable for tower diameters below 0.8m. At present, there is no enlargement to low-concentration carbon dioxide flue gas capture in coal-fired power generation enterprises. The bulk packing has good adaptation conditions, but different packings have obvious influence on the absorption efficiency of the tower body.

[0004] The present application mainly aims at the common problems of low-concentration carbon dioxide in flue gas of coal-fired power generation enterprises and high energy consumption and low efficiency of existing demonstration project packing tower, optimizes various tower advantages and disadvantages, and proposes a single-tower carbon dioxide synergistic absorption device with high and stable carbon dioxide absorption rate. SUMMARY

[0005] The present application provides a single-tower carbon dioxide synergistic absorption device, which optimizes the common problems of low-concentration carbon dioxide in flue gas of coal-fired power generation enterprises and high energy consumption and low efficiency of existing demonstration project packing tower, and has high and stable carbon dioxide absorption rate.

[0006] To achieve the above purpose, the present application adopts the following technical scheme:

[0007] A single-tower carbon dioxide synergistic absorption device, comprising an absorption tower and a capture unit, wherein the capture unit comprises a spraying assembly, a liquid inlet pipe and a liquid holding layer;

[0008] The spraying assembly is arranged in the absorption tower, the liquid inlet pipe is connected with the spraying assembly and used for supplying absorption liquid to the spraying assembly, and the spraying assembly is arranged above the liquid holding layer.

[0009] The liquid holding layer comprises a liquid holding plate arranged on the inner side wall of the absorption tower, a plurality of liquid passing openings are arranged on the liquid holding plate along the radial direction of the absorption tower, a liquid holding piece is arranged below each liquid passing opening, the liquid holding piece is mounted on the lower end surface of the liquid holding plate, and the plurality of liquid holding pieces are arranged in the same direction;

[0010] An air passing channel is formed between two adjacent liquid holding pieces, the air passing channel is communicated with the liquid passing opening, and the air inlet of the air passing channel is partially or completely arranged in a staggered manner with the liquid passing opening.

[0011] Preferably, the liquid holding piece comprises a first connecting plate, a second connecting plate and a guide plate, the first connecting plate is connected with the lower end surface of the liquid holding plate, the first connecting plate, the second connecting plate and the guide plate are sequentially connected to form a hook-shaped structure, and the projection of the liquid passing opening on the second connecting plate is partially or completely located in the second connecting plate.

[0012] Preferably, the guide plate is arranged in an upwardly inclined manner.

[0013] Preferably, the liquid holding layer has multiple layers, the arrangement modes of the liquid holding pieces in the adjacent two liquid holding layers are opposite, and the liquid passing openings of the adjacent two liquid holding layers and the air inlets of the air passing channels are partially or completely arranged in a staggered manner.

[0014] Preferably, the trapping unit further comprises a flow guiding unit, and the flow guiding unit is arranged below the trapping unit.

[0015] The flow guiding unit comprises a plurality of flow guiding plates, the plurality of flow guiding plates are sequentially sleeved from large to small, and a flow guiding gap is formed between the adjacent two flow guiding plates to communicate the space above the flow guiding unit and the space below the flow guiding unit.

[0016] Preferably, the flow guiding plate is a spherical structure with an upward opening and a downward opening, the centers of the flow guiding plates are arranged on the same vertical line, and the centers of the flow guiding plates arranged from large to small in diameter are arranged from top to bottom on the vertical line.

[0017] Preferably, the trapping unit further comprises a liquid recycling unit, and the liquid recycling unit comprises a ring-shaped liquid storage tank and a circulating pump.

[0018] The ring-shaped liquid storage tank is provided with a ring-shaped liquid storage cavity, the upper end surface of the ring-shaped liquid storage tank is provided with a ring-shaped opening, the ring-shaped opening is communicated with the ring-shaped liquid storage cavity, and the outer side wall of the ring-shaped liquid storage tank is connected with the inner side wall of the absorption tower.

[0019] The liquid inlet of the circulating pump is communicated with the ring-shaped liquid storage cavity, and the liquid outlet of the circulating pump is communicated with the spraying assembly.

[0020] Preferably, the liquid recycling unit further comprises a cover, which is arranged on the through hole at the center of the annular liquid storage tank to cover the through hole.

[0021] The upper side wall of the through hole at the center of the annular liquid storage tank is provided with a plurality of air vents in communication with the annular liquid storage cavity, and the plurality of air vents are uniformly distributed in the circumferential direction.

[0022] A plurality of connecting ribs are arranged radially on the annular opening, the lower end of the flow guide plate passes through the annular opening and is located in the annular liquid storage cavity, and the flow guide plate is connected with the connecting ribs.

[0023] Preferably, the larger the inner diameter of the flow guide plate is, the farther the lower end surface of the lower end of the flow guide plate located in the annular liquid storage cavity is from the annular opening.

[0024] Preferably, the trapping unit has a plurality of trapping units arranged in the absorption tower from top to bottom.

[0025] Compared with the prior art, the beneficial effects of the present application are:

[0026] The spray assembly in the trapping unit is used for spraying the absorption liquid downward, and the absorption liquid forms an absorption liquid layer on the liquid holding plate. By arranging the liquid holding members, an air passage in communication with the liquid passage is formed between adjacent two liquid holding members. The flue gas first enters the air passage, and when the flue gas passes through the air passage, the absorption liquid also flows downward along the air passage. The flue gas first passes through the flowing absorption liquid, and then the flue gas passes through the absorption liquid layer, so that the flue gas and the absorption liquid fully react. Compared with a single liquid passage, the contact time of the flue gas and the absorption liquid in the liquid holding layer is prolonged. Moreover, the air inlet of the air passage is arranged in a staggered manner with the liquid passage, which further prolongs the contact time of the flue gas and the absorption liquid in the liquid holding layer, so that the carbon dioxide can be fully absorbed and the absorption is stable and efficient. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the following specific embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0028] Figure 1 The device of the embodiment in the present application is schematically shown Figure 1 (Single trapping unit);

[0029] Figure 2 The liquid holding member of the embodiment in the present application is schematically shown Figure 1 ;

[0030] Figure 3 This is a schematic diagram of the liquid-holding component in an embodiment of the present invention. Figure 2 ;

[0031] Figure 4 This is a top-bottom sectional view of the annular liquid storage tank and the guide plate in an embodiment of the present invention;

[0032] Figure 5 This is a schematic diagram of the overall device in an embodiment of the present invention. Figure 2 (Multiple capture units).

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Absorption tower; 2. Collection unit; 21. Spray assembly; 22. Liquid inlet pipe; 23. Liquid holding layer; 231. Liquid holding plate; 232. Liquid holding component; 2321. First connecting plate; 2322. Second connecting plate; 2323. Guide plate; 233. Liquid inlet; 234. Ventilation channel; 235. Liquid storage tank; 24. Flow guiding unit; 241. Flow guiding plate; 242. Flow guiding gap; 25. Liquid reuse unit; 251. Annular liquid storage tank; 2511. Annular liquid storage cavity; 2512. Ventilation hole; 252. Circulation pump; 253. Cover; 254. Connecting rib; 26. Liquid outlet pipe. Detailed Implementation

[0035] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] like Figures 1-5 As shown, this embodiment of the invention provides a single-tower carbon dioxide enhancement absorption device, including an absorption tower 1 and a collection unit 2. There are multiple collection units 2, which are evenly arranged from bottom to top on the absorption tower 1. The collection units 2 are used to absorb carbon dioxide in flue gas. Depending on the concentration of carbon dioxide in the flue gas, multiple collection units 2 can be used simultaneously or some collection units 2 can be turned off to achieve full absorption of carbon dioxide in the flue gas.

[0039] Specifically, a single collection unit 2 includes a spray assembly 21, an inlet pipe 22, and a liquid holding layer 23. The spray assembly 21 is located inside the absorption tower 1, and the inlet pipe 22 is connected to the spray assembly 21 to supply absorbent to the spray assembly 21. The spray assembly 21 is located above the liquid holding layer 23, and the absorbent forms an absorbent layer when it passes through the liquid holding layer 23. Specifically, the liquid holding layer 23 includes a liquid holding plate 231 located on the inner wall of the absorption tower 1. The liquid holding plate 231 has multiple liquid inlets 233 along the radial direction of the absorption tower 1, so that the absorbent above the liquid holding plate 231 can only flow downward through the liquid inlets 233. The flue gas flows upward and will inevitably pass through the absorbent layer formed on the upper surface of the liquid holding plate 231, thereby forming a bubbling effect, so that the flue gas can fully contact the absorbent and fully absorb carbon dioxide.

[0040] Each liquid inlet 233 is equipped with a liquid holding member 232 below it, meaning the number of liquid holding members 232 is the same as the number of liquid inlets 233. The liquid holding members 232 are installed on the lower end face of the liquid holding plate 231. Multiple liquid holding members 232 within the same liquid holding layer 23 face the same direction, and an air passage 234 is formed between two adjacent liquid holding members 232. The air passage 234 is connected to the liquid inlet 233, so that the flue gas enters the air passage 234 and flows out from the liquid inlet 233 to the top of the liquid holding layer 23. During the process of the flue gas passing through the air passage 234, the absorbent liquid passes through the liquid inlet 233 and flows downward along the air passage 234. The flue gas from bottom to top will first pass through the flowing absorbent liquid, and then the flue gas passes through the absorbent liquid layer, so that... The flue gas and absorbent react fully, and the air inlet and liquid outlet 233 of the ventilation channel 234 are partially or completely offset. Partial offset means that the air inlet and liquid outlet 233 overlap in the vertical projection, while complete offset means that they do not overlap in the vertical direction. This arrangement of the air inlet and liquid outlet 233, compared to a single vertical liquid outlet 233, means that the absorption channel formed by the liquid outlet 233 and the ventilation channel 234 for the flow of absorbent and flue gas is not a vertical channel, but can be curved or zigzag. This prolongs the contact time between the flue gas and absorbent in the liquid holding layer 23, enabling sufficient and stable absorption of carbon dioxide.

[0041] Specifically, with Figure 1 The multiple liquid inlets 233 are evenly arranged from left to right, and the cross-section of the liquid inlets 233 can be rectangular, conical or other shapes; specifically, the spray assembly 21 includes a mounting frame and multiple nozzles, the multiple nozzles are evenly arranged on the mounting frame, and the liquid inlet pipe 22 is connected to the nozzles. The mounting frame can adopt the structure of the existing mounting frame in the absorption tower 1, and the arrangement of the multiple nozzles on the mounting frame can also be the same as the existing technology.

[0042] Specifically, the liquid holding component 232 includes a first connecting plate 2321, a second connecting plate 2322, and a guide plate 2323. The first connecting plate 2321 is connected to the lower end face of the liquid holding plate 231. The first connecting plate 2321, the second connecting plate 2322, and the guide plate 2323 are connected in sequence to form a hook-shaped structure, thereby forming a liquid storage tank 235, which can temporarily store absorbent liquid and increase the residence time of some absorbent liquid in the absorption channel formed by the liquid inlet 233 and the air passage 234, so as to fully react with carbon dioxide in the flue gas. The reaction fully utilizes the absorbent liquid; moreover, the projection of the liquid inlet 233 on the second connecting plate 2322 is partially or entirely located within the second connecting plate 2322, causing the air inlet of the ventilation channel 234 to be partially or entirely misaligned with the liquid inlet 233. This allows the flue gas to enter the ventilation channel 234 along the guide plate 241, sequentially contacting the absorbent liquid within the ventilation channel 234 and the absorbent liquid in the storage tank 235, and finally passing through the absorbent liquid layer formed on the liquid holding plate 231 via the air inlet, ensuring sufficient carbon dioxide absorption. Specifically, in this embodiment, as... Figure 1 As shown, the first connecting plate 2321 is vertically arranged, and the second connecting plate 2322 is horizontally arranged. Preferably, the guide plate 2323 is inclined upward, that is, the angle between it and the second connecting plate 2322 is an obtuse angle, so that the flue gas enters the ventilation channel 234 along the guide plate 2323. The flue gas will collide with the adjacent first connecting plate 2321, which will reduce the flow velocity of the flue gas, thereby making the residence time of the flue gas in the ventilation channel 234 longer and reacting more fully with the absorbent liquid inside.

[0043] Specifically, such as Figures 2-3 As shown, in order to ensure that all the flue gas enters the ventilation channel 234, the two ends of the liquid inlet 233 penetrate through the two ends of the liquid holding plate 231. Correspondingly, both ends of the liquid holding member 232 are connected to the inner wall of the absorption tower 1. That is, the two ends of the first connecting plate 2321, the second connecting plate 2322 and the guide plate 2323 are all connected to the inner wall of the absorption tower 1. The ventilation channel 234 is surrounded by two adjacent liquid holding members 232 and the inner wall of the absorption tower 1, so that all the flue gas can enter from the ventilation channel 234 and then be discharged from the liquid inlet 233 into the upper area.

[0044] Furthermore, to ensure more thorough absorption of carbon dioxide in the flue gas, the liquid-holding layer 23 within the collection unit 2 has multiple layers. Specifically, the liquid-holding elements 232 within adjacent liquid-holding layers 23 are arranged in opposite ways, causing the liquid inlets 233 of adjacent liquid-holding layers 23 to be partially or completely offset from the air inlets of the ventilation channels 234. There is a transition space between the two liquid-holding layers 23, lengthening the flow path of the flue gas from the liquid inlet 233 of the lower liquid-holding layer 23 to the air inlet of the ventilation channel 234 of the upper liquid-holding layer 23. In other words, the flow path within the transition space is lengthened, and absorbent liquid also flows downwards within the transition space. This increases the contact time between the flue gas and the absorbent liquid within the transition space, resulting in better absorption. Multiple liquid-holding layers 23 also enable multiple rectification of the flue gas, improving its uniformity and further enhancing carbon dioxide removal efficiency. In this embodiment, there are two liquid-holding layers 23. Of course, the number of liquid-holding layers 23 can be determined by the user based on specific application requirements.

[0045] Furthermore, in order to ensure that the flue gas is evenly distributed within the absorption tower 1 before flowing into the liquid holding layer 23, a flow guiding unit 24 is provided in the collection unit 2. The flow guiding unit 24 is located below the collection unit 2. Specifically, the flow guiding unit 24 includes multiple flow guiding plates 241, which are arranged sequentially from large to small. A flow guiding gap 242 is formed between two adjacent flow guiding plates 241, connecting the space above and below the flow guiding unit 24. Moreover, the inlet width of each flow guiding gap 242 is equal in the radial direction. Before the flue gas flows into the liquid holding layer 23 through each flow guiding gap 242, the flue gas is evenly distributed within the absorption tower 1, so that the flue gas can enter the liquid holding layer 23 evenly, resulting in a higher carbon dioxide removal efficiency in the flue gas. Preferably, the guide plate 241 is a spherical structure with openings at the top and bottom. The centers of the spheres of each guide plate 241 are located on the same vertical line, and the centers of the spheres of each guide plate 241 arranged from large to small are set from top to bottom on the vertical line. With this arrangement, the outlet of the guide gap 242 is larger than the inlet compared to the guide plates 241 being set with the same center. As a result, the area of ​​flue gas distribution from the outlet of the guide gap 242 is larger. Moreover, the outlet of the guide plate 241 closer to the inner wall of the absorption tower 1 is more biased towards the inner wall of the absorption tower 1. The flue gas exiting from the outlet of the guide gap 242 will completely cover the cross-section of the absorption tower 1, thereby making the flue gas distribution in the area below the liquid holding layer 23 more uniform.

[0046] Furthermore, to avoid waste of absorbent and reduce energy consumption of the carbon capture system, achieving energy conservation and carbon reduction, the capture unit 2 also includes a liquid reuse unit 25. The liquid reuse unit 25 includes an annular storage tank 251 and a circulating pump 252. The annular storage tank 251 is located below the flow guiding unit 24. The annular storage tank 251 has an annular storage cavity 2511, and an annular opening on its upper surface, which communicates with the annular storage cavity 2511. The outer wall of the annular storage tank 251 is connected to the inner wall of the absorption tower 1. The inlet of the circulating pump 252 is connected to the annular storage... The liquid chamber 2511 is connected, and the outlet of the circulation pump 252 is connected to the spray assembly 21. Thus, most of the absorbent flowing from top to bottom will enter the annular storage chamber 2511 through the annular opening. Then, the absorbent in the annular storage chamber 2511 will enter the spray assembly 21 again through the circulation pump 252 for spraying again, and be recycled. Furthermore, the outlet of the circulation pump 252 is also connected to a drain pipe. After the absorbent has been circulated for a certain period of time, it can be discharged through the circulation pump 252 into the outlet pipe 26, and then new absorbent can be introduced through the inlet pipe 22 for recycling.

[0047] Preferably, the bottom of the annular liquid storage chamber 2511 adopts an outer bottom and an inner top structure, that is, the bottom of the chamber includes an annular horizontal bottom and an upwardly inclined annular bottom, which are connected together, so that the absorbent liquid can quickly gather on the horizontal bottom and be driven by the circulation pump 252 for circulation.

[0048] Furthermore, to further avoid waste of the absorbent liquid, the liquid reuse unit 25 also includes a cap 253. The cap 253 has a spherical structure. Specifically, the cap 253 is located on the through hole at the center of the annular liquid storage tank 251, used to seal the through hole, so that almost all of the absorbent liquid can enter the annular liquid storage cavity 2511, avoiding waste. Moreover, the upper side wall of the through hole at the center of the annular liquid storage tank 251 has multiple vent holes 2512 communicating with the annular liquid storage cavity 2511. The multiple vent holes 2512 are evenly distributed circumferentially, allowing flue gas to enter the annular liquid storage cavity 2511 from the vent holes 2512, forming an initial uniform distribution. When the flue gas flows upward, it will contact and react with the absorbent liquid entering the annular outlet cavity, absorbing the carbon dioxide from the flue gas. Specifically, as... Figure 4 As shown, multiple connecting ribs 254 are radially arranged on the annular opening to strengthen the annular liquid storage tank 251; and the lower end of the guide plate 241 passes through the annular opening and is located inside the annular liquid storage cavity 2511. The guide plate 241 is connected to the connecting ribs 254 to fix the multiple guide plates 241.

[0049] Preferably, to further ensure that the flue gas is evenly distributed in the area below the liquid holding layer 23, the lower end face of the guide plate 241 with a larger inner diameter is located further away from the annular opening at the lower end of the annular liquid storage cavity 2511. That is, the lower end of the guide plate 241 decreases in length from the outside to the inside. Since the flow area of ​​the guide gap 242 closer to the inner wall of the absorption tower 1 is larger and the resistance is smaller, the flue gas will enter the guide gap 242 with less resistance. Thus, most of the flue gas will be in the guide gap 242 closer to the inner wall of the absorption tower 1. 2. Flow: The amount of flue gas flowing in the guide gap 242 near the center will be relatively small. In order to meet the principle of uniform resistance distribution, the guide plate 241 is set in a way that the length gradually increases from the center to the side wall, thereby appropriately increasing the resistance at the inlet of each guide gap 242, so that the resistance at the inlet of each guide gap 242 is basically equal, so that the flue gas is evenly distributed in the gaps between the guide plates 241, and thus can further make the flue gas evenly distributed in the area below the liquid holding layer 23.

[0050] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A single-tower carbon dioxide enhancement absorption device, characterized in that, It includes an absorption tower and a collection unit, wherein the collection unit includes a spray assembly, a liquid inlet pipe and a liquid holding layer; The spray assembly is located inside the absorption tower, and the liquid inlet pipe is connected to the spray assembly to supply the spray assembly with absorbent liquid. The spray assembly is located above the liquid holding layer. The liquid holding layer includes a liquid holding plate disposed on the inner side wall of the absorption tower. The liquid holding plate is provided with multiple liquid inlets along the radial direction of the absorption tower. Each liquid inlet is provided with a liquid holding element below it. The liquid holding element is installed on the lower end face of the liquid holding plate, and the multiple liquid holding elements face the same direction. A ventilation channel is formed between two adjacent liquid holding components. The ventilation channel is connected to the liquid inlet, and the air inlet of the ventilation channel is partially or completely offset from the liquid inlet. The liquid holding component includes a first connecting plate, a second connecting plate, and a guide plate. The lower end faces of the first connecting plate and the liquid holding plate are connected. The first connecting plate, the second connecting plate, and the guide plate are connected in sequence to form a hook-shaped structure. The projection of the liquid inlet on the second connecting plate is located within the second connecting plate.

2. The single-tower carbon dioxide enhancement absorption device according to claim 1, characterized in that, The guide plate is set at an angle.

3. The single-tower carbon dioxide enhancement absorption device according to claim 1, characterized in that, The liquid holding layer has multiple layers, and the liquid holding elements in two adjacent liquid holding layers are arranged in opposite ways, so that the liquid inlet of the two adjacent liquid holding layers is partially or completely misaligned with the air inlet of the ventilation channel.

4. The single-tower carbon dioxide enhancement absorption device according to claim 1, characterized in that, The collection unit further includes a flow guiding unit, which is disposed below the collection unit; The flow guiding unit includes multiple flow guiding plates, which are nested in descending order of size, and a flow guiding gap is formed between two adjacent flow guiding plates to connect the space above and below the flow guiding unit.

5. The single-tower carbon dioxide enhancement absorption device according to claim 4, characterized in that, The guide plate is a spherical structure with openings at the top and bottom. The centers of the spheres of each guide plate are located on the same vertical line, and the centers of the spheres of each guide plate, arranged from large to small inner diameter, are set from top to bottom on the vertical line.

6. The single-tower carbon dioxide enhancement absorption device according to claim 4, characterized in that, The collection unit further includes a liquid reuse unit, which includes an annular storage tank and a circulation pump. The annular storage tank is located below the flow guiding unit. The annular liquid storage tank is provided with an annular liquid storage cavity, and the upper end face of the annular liquid storage tank is provided with an annular opening, which communicates with the annular liquid storage cavity. The outer wall of the annular liquid storage tank is connected to the inner wall of the absorption tower. The inlet of the circulating pump is connected to the annular storage chamber, and the outlet of the circulating pump is connected to the spray assembly.

7. The single-tower carbon dioxide enhancement absorption device according to claim 6, characterized in that, The liquid recycling unit also includes a cap, which is disposed on a through hole at the center of the annular liquid storage tank and is used to seal the through hole. The upper sidewall of the through hole at the center of the annular liquid storage tank is provided with a plurality of vent holes communicating with the annular liquid storage cavity, and the plurality of vent holes are evenly distributed circumferentially. The annular opening is provided with multiple connecting ribs radially. The lower end of the guide plate passes through the annular opening and is located in the annular liquid storage cavity. The guide plate is connected to the connecting ribs.

8. The single-tower carbon dioxide enhancement absorption device according to claim 7, characterized in that, The larger the inner diameter of the guide plate, the farther the lower end face of the guide plate at the lower end of the annular liquid storage cavity is from the annular opening.

9. The single-tower carbon dioxide enhancement absorption device according to claim 1, characterized in that, There are multiple trapping units, which are arranged from top to bottom in the absorption tower.

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