An absorption tower

Abstract

The application provides an absorption tower, comprising: a tower body, an absorption section being arranged in the tower body; a first gas inlet being arranged at the bottom of the tower body; a gas outlet being arranged at the top of the tower body; a gas inlet pipe comprising a main pipe body and branch pipes, the main pipe body being communicated with the first gas inlet, the first end of the branch pipes being connected with the main pipe body, and the second end of the branch pipes being connected with the tower body and being correspondingly arranged with the absorption section; and gas is distributed to the branch pipes through the main pipe body and is correspondingly arranged with the absorption section through the second end of the branch pipes, so that the problem of uneven distribution of gas-liquid two-phase in the filler layer in the related art is effectively solved.

Description

Technical Field

[0001] This invention relates to the fields of chemical and environmental protection technologies, and more specifically, to an absorption tower. Background Technology

[0002] Currently, liquid is added from the top of the absorption tower, sprayed onto the packing material by a liquid distributor, and flows down along the voids within the packing. Gas is introduced from the bottom of the tower, distributed by a gas distributor, and flows counter-currently through the voids of the packing layer, allowing for close contact and mass transfer between the gas and liquid phases. As the liquid flows down the packing layer, it tends to concentrate towards the tower wall, causing the liquid flow rate near the wall to gradually increase. This phenomenon is called the wall flow effect. The wall flow effect causes uneven distribution of the gas and liquid phases within the packing layer, thus reducing mass transfer efficiency and affecting the quality of the finished product. Summary of the Invention

[0003] The main objective of this invention is to provide a solution to the problem of uneven distribution of gas and liquid phases in the packing layer due to wall flow phenomena in related technologies.

[0004] To achieve the above objectives, the present invention provides an absorption tower, comprising: a tower body, wherein an absorption section is disposed within the tower body; a first air inlet disposed at the bottom of the tower body; an air outlet disposed at the top of the tower body; and an air inlet pipe, comprising a main pipe and a branch pipe, wherein the main pipe is connected to the first air inlet, the first end of the branch pipe is connected to the main pipe, and the second end of the branch pipe is connected to the tower body and is disposed corresponding to the absorption section.

[0005] Furthermore, the tower body is provided with multiple second air inlets in the circumferential direction, and the multiple second air inlets are provided in correspondence with the absorption section. The second end of the branch pipe is connected to the multiple second air inlets.

[0006] Furthermore, multiple second air inlets are arranged in an array to form multiple hole groups, which are spaced apart along the height of the tower. Each hole group includes multiple second air inlets, wherein the difference in the number of second air inlets in two adjacent hole groups is 1.

[0007] Furthermore, the branch pipe includes a pipe section and an enclosure. The enclosure is located on the outside of the tower body and is correspondingly arranged with the absorption section. A receiving cavity is formed between the enclosure and the tower body. The second air inlet connects the receiving cavity and the interior of the tower body.

[0008] Furthermore, the diameter a of the main pipe and the diameter b of the pipe segment satisfy the following condition: 2.5 ≤ a / b ≤ 4.

[0009] Furthermore, a first liquid inlet is provided on the side wall of the tower body, and the first liquid inlet is located above the absorption section.

[0010] Furthermore, the absorption tower also includes a gas distributor, which is located at the bottom of the tower body and connected to the first air inlet. The height of the gas distributor gradually decreases from the direction closest to the first air inlet to the direction furthest from the first air inlet.

[0011] Furthermore, the absorption tower also includes a first collector disposed inside the tower body and below the absorption section, the first collector including a first filter membrane.

[0012] Furthermore, the absorption tower also includes a second inlet and a second collector. The second inlet is located at the top of the tower body, and the second collector is located below the second inlet and above the first inlet. The second collector includes a second filter membrane.

[0013] Furthermore, the absorption tower also includes a packing structure, which is disposed inside the absorption tower and located in the absorption section.

[0014] The present invention comprises a tower body with an absorption section inside; a first air inlet located at the bottom of the tower body; an air outlet located at the top of the tower body; and an air inlet pipe including a main pipe and branch pipes. The main pipe is connected to the first air inlet, the first end of the branch pipe is connected to the main pipe, and the second end of the branch pipe is connected to the tower body and correspondingly positioned to the absorption section. By providing an absorption section inside the tower body, the internal packing material can come into contact with the gas and liquid, allowing the components in the gas to be absorbed by the liquid. The branch pipes of the air inlet pipe ensure that the gas is evenly distributed to various positions within the absorption section inside the tower body, guaranteeing uniform contact between the gas and the absorbent liquid. This, combined with the introduction of the gas to be treated through the first air inlet and the discharge of the treated gas through the air outlet, effectively solves the problem of uneven distribution of the gas and liquid phases in the packing layer in related technologies. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0016] Figure 1 A three-dimensional structural schematic diagram of an embodiment of the absorption tower according to the present invention is shown;

[0017] Figure 2 It shows Figure 1 A cross-sectional schematic diagram of the absorption tower;

[0018] Figure 3 It shows Figure 1 A schematic diagram of the exploded structure of the absorption tower;

[0019] Figure 4 It shows Figure 1A three-dimensional structural diagram of the gas distributor of the absorption tower;

[0020] Figure 5 It shows Figure 4 A cross-sectional schematic diagram of a gas distributor.

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

[0022] 10. Tower body; 11. Absorption section; 12. Second air inlet; 13. First liquid inlet; 20. First air inlet; 30. Air outlet; 40. Air inlet pipe; 41. Main body; 42. Branch pipe; 421. Pipe section; 422. Enclosure; 423. Receiving cavity; 50. Gas distributor; 61. First collector; 62. Second liquid inlet; 63. Second collector; 64. Packing structure. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. 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.

[0024] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0025] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0026] like Figures 1 to 3 As shown, in this embodiment, in order to achieve the above objective, the present invention provides an absorption tower comprising: a tower body 10, wherein an absorption section 11 is provided inside; a first air inlet 20, disposed at the bottom of the tower body 10; an air outlet 30, disposed at the top of the tower body 10; and an air inlet pipe 40, comprising a main pipe 41 and a branch pipe 42, wherein the main pipe 41 is connected to the first air inlet 20, the first end of the branch pipe 42 is connected to the main pipe 41, and the second end of the branch pipe 42 is connected to the tower body 10 and is correspondingly disposed with respect to the absorption section 11.

[0027] Applying the technical solution of this invention, an absorption section is provided inside the tower body 10; a first air inlet 20 is located at the bottom of the tower body 10; an air outlet 30 is located at the top of the tower body 10; the air inlet pipe 40 includes a main pipe 41 and a branch pipe 42, the main pipe 41 is connected to the first air inlet 20, the first end of the branch pipe 42 is connected to the main pipe 41, and the second end of the branch pipe 42 is connected to the tower body 10 and correspondingly arranged with the absorption section 11. By providing an absorption section 11 inside the tower body 10, the internal packing material can come into contact with the gas and liquid, allowing the components in the gas to be absorbed by the liquid. By setting the branch pipe 42 of the air inlet pipe 40, the gas is evenly distributed to various positions inside the absorption section 11 of the tower body 10, ensuring that the gas is evenly contacted with the absorbent liquid in the absorption section 11. This, combined with the introduction of the gas to be treated through the first air inlet 20 and the discharge of the treated gas through the air outlet 30, effectively solves the problem of uneven distribution of the gas and liquid phases in the packing layer in related technologies.

[0028] Specifically, this design effectively increases the contact area between the gas and the absorbent, thereby enhancing the absorption effect. It is suitable for waste gas treatment in industries such as chemical, power, and metallurgy, and is particularly effective when treating industrial waste gas containing large amounts of harmful gases. By implementing this design, the residence time of the gas in the absorption tower is extended, improving the capture efficiency of harmful gases, reducing emission concentrations, and effectively alleviating environmental pollution problems. It demonstrates its superiority, especially in applications in densely industrialized areas such as chemical industrial parks, large power plants, and steel mills.

[0029] like Figures 1 to 3 As shown, in this embodiment, the tower body 10 is provided with a plurality of second air inlets 12 in the circumferential direction. The plurality of second air inlets 12 are correspondingly arranged with the absorption section 11, and the second end of the branch pipe 42 is connected to the plurality of second air inlets 12. By providing a plurality of second air inlets 12 and correspondingly arranging them with the absorption section 11, the gas is made to enter the absorption section 11 evenly through the branch pipe 42 and the second air inlets 12, thereby improving the gas-liquid contact efficiency.

[0030] It should be noted that this multi-point air intake design (multiple second air inlets 12) allows for a more uniform gas distribution throughout the absorption section 11, avoiding the low absorption efficiency caused by uneven gas distribution in traditional single-point air intake. This design is particularly suitable for treating high-concentration, high-flow-rate waste gases, such as tail gas treatment in the petrochemical industry. In the petrochemical industry, this design can significantly improve the removal rate of harmful gases such as sulfur dioxide and nitrogen oxides in tail gas, reducing the environmental impact of production. Simultaneously, due to the more uniform gas distribution, the operational stability of the absorption tower is improved, reducing maintenance costs and increasing overall economic efficiency.

[0031] like Figures 1 to 3 As shown, in this embodiment, multiple second air inlets 12 are arranged in an array to form multiple hole groups. These hole groups are spaced apart along the height direction of the tower body 10. Each hole group includes multiple second air inlets 12, wherein the difference in the number of second air inlets 12 between two adjacent hole groups is 1. The multiple second air inlets 12 are arranged in an array to form multiple hole groups, meaning that second air inlets 12 at the same height are grouped into the same hole group. Each hole group is spaced apart along the height direction of the tower body 10, ensuring that the gas enters the interior through the hole group and contacts the liquid uniformly. Furthermore, due to the different widths of the tower body 10, the number of second air inlets 12 within each hole group increases sequentially from narrowest to widest within the tower body 10.

[0032] Specifically, this design with multiple gradually varying second air inlets (12) can adjust the air intake according to pressure changes during gas ascent, ensuring uniform gas distribution within the absorption tower. This is suitable for treating waste gases with significant pressure fluctuations, such as those used in flue gas desulfurization and denitrification in the power industry. In the power industry, flue gas pressure fluctuations often lead to a decline in the performance of traditional absorption towers. However, this solution's absorption tower can adjust the number of air inlets in real time according to pressure changes, effectively stabilizing the absorption process and improving the efficiency and reliability of flue gas treatment. Particularly in large power facilities such as coal-fired power plants and gas-fired power plants, it can significantly reduce harmful gas emissions and protect the atmospheric environment.

[0033] like Figures 1 to 3 As shown, in this embodiment, the branch pipe 42 includes a pipe section 421 and an enclosing portion 422. The enclosing portion 422 surrounds the outside of the tower body 10 and is correspondingly arranged with the absorption section 11. A receiving cavity 423 is formed between the enclosing portion 422 and the tower body 10. The second air inlet 12 connects the receiving cavity 423 and the interior of the tower body 10. To ensure the uniformity of gas distribution, the enclosing portion 422 is provided on the outside of the tower body 10 and is correspondingly arranged with the absorption section 11 to ensure uniform internal gas distribution. The receiving cavity 423 formed between the enclosing portion 422 and the tower body 10 accommodates the gas, and with the help of multiple hole groups, the gas distribution is made more uniform.

[0034] Specifically, this structure ensures that the gas is pre-distributed within the containment cavity 423 before entering the absorption section 11, improving the contact efficiency between the gas and the absorbent. It is particularly suitable for applications requiring high-efficiency absorption, such as the purification of hazardous gases in the pharmaceutical industry. In the pharmaceutical industry, there are many types of hazardous gases, which often contain high concentrations of organic solvents.

[0035] The absorption tower in this solution can be designed with specific absorbents for different harmful gases. By pre-distributing the absorbent to increase the contact area between the absorbent and the gas, the purification efficiency is greatly improved, ensuring the cleanliness of the production environment and reducing the potential health threat of harmful substances to workers.

[0036] like Figures 1 to 3 As shown, in this embodiment, the diameter a of the main pipe 41 and the diameter b of the pipe segment 421 satisfy the following condition: 2.5 ≤ a / b ≤ 4. The configuration of the main pipe and the pipe segment 421 determines whether the gas can be evenly distributed after entering. Therefore, the diameters of the main pipe and the pipe segment 421 need to be strictly set to ensure reasonable gas flow rate and pressure distribution, and to avoid operational problems caused by uneven gas distribution or excessive flow rate due to the main pipe and the pipe segment 421 being too large or too small.

[0037] It should be noted that by precisely controlling the diameter ratio of the main pipe 41 to the branch pipe 42, gas flow can be optimized, resistance reduced, and the processing capacity and energy efficiency of the absorption tower improved. This method is suitable for various industrial waste gas treatment systems, such as the purification of acidic gases in the steel industry. In the steel industry, the purification of acidic gases is a major challenge in the production process. By adjusting the diameter ratio of the main pipe 41 to the branch pipe 42, the resistance to gas flow can be effectively reduced, the processing capacity of the absorption tower improved, and energy consumption and production costs reduced. This has a significant effect on enhancing the environmental image and economic benefits of steel enterprises.

[0038] like Figures 1 to 3 As shown, in this embodiment, a first liquid inlet 13 is provided on the side wall of the tower body 10, and the first liquid inlet 13 is located above the absorption section 11. The liquid inlet is used to introduce absorbent liquid. The first liquid inlet 13 is located above the absorption section 11, so that the absorbent liquid flows downward from the top of the tower and comes into countercurrent contact with the rising gas below, thereby improving the absorption efficiency.

[0039] Specifically, this design allows the absorbent to be sprayed directly onto the area through which the gas flows, enhancing the absorption effect. It is suitable for treating waste gases containing water-soluble harmful gases, such as those from the papermaking industry. In the papermaking industry, waste gases often contain large amounts of water-soluble harmful gases, such as hydrogen sulfide and ammonia. Precise spraying through the first inlet 13 effectively captures these harmful gases. Furthermore, the placement of the first inlet 13 avoids absorbent waste, improves resource utilization, and reduces operating costs.

[0040] like Figure 1 , Figure 4 as well as Figure 5 As shown, in this embodiment, the absorption tower also includes a gas distributor 50. The gas distributor 50 is disposed at the bottom of the tower body 10 and communicates with the first liquid inlet 13. The height of the gas distributor 50 gradually decreases from near the first liquid inlet 13 to away from the first liquid inlet 13. The distributor is disposed at the bottom of the tower body 10 to ensure uniform distribution of the introduced gas, prevent eddies or deflection of the gas when entering the tower body 10, and improve the uniform contact of the gas in the absorption section 11.

[0041] Specifically, the design of this gas distributor 50 enables a uniform airflow distribution when the gas enters the tower 10, avoiding insufficient absorption caused by excessively rapid local airflow. It is particularly suitable for treating exhaust gases containing particulate matter, such as dust control in the cement industry. In the cement industry, the concentration of particulate matter in exhaust gases is high. The optimized design of the gas distributor 50 ensures smoother gas flow, prevents particulate matter deposition, reduces equipment maintenance frequency, and improves the absorption efficiency of harmful gases. This contributes to enhancing the environmental friendliness of cement plants and reducing the impact on the lives of surrounding residents.

[0042] like Figures 1 to 3 As shown, in this embodiment, the absorption tower further includes a first collector 61, which is disposed inside the tower body 10 and below the absorption section 11. The first collector 61 includes a first filter membrane. The first collector 61 is disposed below the absorption section 11 and is used to collect the absorbent liquid. The filter membrane ensures that the absorbent liquid is free of impurities, improves the absorption effect, and only allows gas to pass through the filter membrane, while liquid cannot pass through the filter membrane.

[0043] Specifically, the first collector 61 can effectively collect and filter residual harmful substances, protect equipment, and extend its service life. It is suitable for treating waste gas containing high concentrations of harmful substances, such as organic waste gas treatment in the electronics industry. In the electronics industry, waste gas contains a large amount of organic solvents. The first collector 61 can effectively block and capture these organic substances, preventing them from causing pollution and damage to downstream equipment. At the same time, the design of the first filter membrane can be adjusted according to the composition of the waste gas, improving the collector's targeting and filtration efficiency, ensuring the continuous and stable operation of the electronics factory, and playing an important role in improving product quality and production safety.

[0044] like Figures 1 to 3 As shown, in this embodiment, the absorption tower also includes a second inlet 62 and a second collector 63. The second inlet 62 is located at the top of the tower body 10, and the second collector 63 is located below the second inlet 62 and above the first inlet 13. The second collector 63 includes a second filter membrane.

[0045] Specifically, the second collector 63 can further purify the gas, ensuring the cleanliness of the emitted gas. It is suitable for applications with strict emission standards, such as VOCs emission control in the pharmaceutical industry. In the pharmaceutical industry, VOCs (volatile organic compounds) emission control is extremely stringent. The second collector 63 can perform secondary purification of the gas, ensuring that the VOCs concentration in the emitted gas is lower than the national standard, thus avoiding environmental penalties. At the same time, the selection of the second filter membrane can be optimized according to the type of VOCs, improving purification efficiency.

[0046] like Figures 1 to 3 As shown, in this embodiment, the absorption tower also includes a packing structure 64, which is disposed inside the absorption tower and located in the absorption section 11. The packing structure 64 is disposed within the absorption section 11 to provide a surface area for gas-liquid contact, promoting the absorption of components in the gas by the liquid.

[0047] Specifically, the packing structure 64 increases the contact area between the gas and the absorbent, improving absorption efficiency. Simultaneously, the selection and design of the packing can be optimized for different waste gas components, making it suitable for various industrial waste gas treatments, such as those in the petrochemical, power, metallurgical, pharmaceutical, and cement industries. It effectively reduces harmful gas emissions, protects the environment, and meets the requirements of green production. Through customized packing structure 64 design, the absorption tower can select the most suitable packing type and structure based on the specific waste gas characteristics of an industry. For example, activated carbon packing is used in the petrochemical industry, and limestone packing is used in the power industry. This effectively improves the treatment efficiency and adaptability of the absorption tower, reduces harmful gas pollution to the atmosphere, and has a positive significance for promoting green production and achieving sustainable development goals.

[0048] like Figures 1 to 3 As shown, in this embodiment, the flue gas is diverted to form a first diversion pipe, a second diversion pipe, and a main pipe. The main pipe enters from the bottom of the tower, and the first and second diversion pipes enter the interior of the tower body 10 from both sides of the tower body 10, respectively, and are located at both ends of the packing structure 64. That is, the flue gas is directly blown in, which can avoid the wall flow phenomenon at the packing structure 64 of the tower body 10.

[0049] Specifically, by uniformly distributing the flue gas, the gas-liquid contact area is maximized, thereby improving pollutant removal efficiency. Specially designed diversion pipes and distributors reduce gas flow non-uniformity, lower system pressure drop, and improve overall performance. Reducing wall flow helps lower unnecessary energy consumption during system operation because smoother gas flow reduces pressure loss. Enhanced system stability: Uniform flue gas distribution reduces excessive load in localized areas, thus enhancing the long-term stability and reliability of the system. Avoiding uneven corrosion and wear caused by wall flow helps extend the service life of the absorption tower and related equipment components.

[0050] The technical solution of this embodiment, by setting an absorption section 11 inside the tower body 10 and adopting an air inlet structure of main pipe 41 and branch pipe 42, enables more uniform gas distribution when entering the absorption tower, thereby improving absorption efficiency. Simultaneously, by adjusting the diameter ratio of the main pipe 41 to the branch pipe 42, gas flow can be optimized, resistance reduced, and the absorption effect further enhanced. Furthermore, the gas distributor 50, first collector 61, and second collector 63 effectively filter and collect residual substances, protecting the equipment and extending its service life. The overall design improves the operating efficiency and safety of the absorption tower, offering significant benefits to environmental protection and industrial production.

[0051] Overall, the absorption tower in this solution, through optimization of the inlet structure, gas distribution, absorbent spraying, collector design, and packing structure, significantly improves absorption efficiency, reduces equipment resistance, and extends service life. It is suitable for treating various industrial waste gases, especially those with high concentrations, high flow rates, and large pressure fluctuations. Furthermore, its design is highly flexible, allowing for customized adjustments to meet the specific characteristics of waste gases from different industries, satisfying stringent environmental emission standards. This is of great significance for promoting green industrial transformation and protecting the ecological environment.

[0052] Furthermore, through rational design, this absorption tower can reduce operating costs and improve economic efficiency, representing a significant innovation in the field of industrial waste gas treatment. This innovative design not only reduces the initial investment and operating costs of environmental protection facilities for enterprises but also creates greater green economic benefits for enterprises by improving waste gas treatment efficiency and reducing energy consumption. It also makes a positive contribution to achieving global environmental governance goals.

[0053] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0054] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0055] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0056] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An absorption column, characterized by include: The tower body (10) is provided with an absorption section (11). The first air inlet (20) is located at the bottom of the tower body (10); An air outlet (30) is located at the top of the tower body (10); The air inlet pipe (40) includes a main body (41) and a branch pipe (42). The main body (41) is connected to the first air inlet (20). The first end of the branch pipe (42) is connected to the main body (41), and the second end of the branch pipe (42) is connected to the tower body (10) and is correspondingly arranged with the absorption section (11). The tower body (10) is provided with a plurality of second air inlets (12) in the circumferential direction. The plurality of second air inlets (12) are provided in correspondence with the absorption section (11). The second end of the branch pipe (42) is connected to the plurality of second air inlets (12). The branch pipe (42) includes a pipe section (421) and an enclosure (422). The enclosure (422) surrounds the outside of the tower body (10) and is correspondingly arranged with the absorption section (11). A receiving cavity (423) is formed between the enclosure (422) and the tower body (10). The second air inlet (12) connects the receiving cavity (423) and the interior of the tower body (10).

2. The absorption column of claim 1, wherein, Multiple second air inlets (12) are arranged in an array to form multiple hole groups, which are spaced apart along the height direction of the tower body (10). Each hole group includes multiple second air inlets (12), wherein the difference in the number of second air inlets (12) in two adjacent hole groups is 1.

3. The absorption column of claim 1, wherein, The diameter a of the main body (41) and the diameter b of the pipe segment (421) satisfy the following condition: 2.5 ≤ a / b ≤ 4.

4. The absorption column of claim 1, wherein, The tower body (10) is provided with a first liquid inlet (13) on its side wall, and the first liquid inlet (13) is located above the absorption section (11).

5. The absorption column of claim 1, wherein, The absorption tower also includes a gas distributor (50), which is located at the bottom of the tower body (10) and communicates with the first air inlet (20). The height of the gas distributor (50) gradually decreases from the direction close to the first air inlet (20) to the direction far away from the first air inlet (20).

6. The absorption column of claim 1, wherein, The absorption tower also includes a first collector (61), which is disposed inside the tower body (10) and below the absorption section (11), and the first collector (61) includes a first filter membrane.

7. The absorption column of claim 4, wherein The absorption tower also includes a second inlet (62) and a second collector (63). The second inlet (62) is located at the top of the tower body (10), and the second collector (63) is located below the second inlet (62) and above the first inlet (13). The second collector (63) includes a second filter membrane.

8. The absorption column of claim 1, wherein, The absorption tower also includes a packing structure (64), which is disposed inside the absorption tower and located at the absorption section (11).

Images