Gas-liquid mixed absorber

Abstract

The invention relates to the field of gas absorption, and provides a gas-liquid mixed absorber which comprises a shell, three cavities are sequentially arranged in the shell, the cavities located at the two ends are provided with an absorption medium inlet and an absorption medium outlet respectively, and the cavity located in the middle is provided with a cooling medium inlet and a cooling medium outlet; the communicating pipe penetrates through the cavity located in the middle, and the two ends of the communicating pipe communicate with the cavities located at the two ends correspondingly; the gas distribution unit is arranged in the cavity provided with the absorption medium inlet, the gas distribution unit is used for being connected with a gas source, and gas distribution holes are formed in the gas distribution unit; and the mixing unit is arranged in the communicating pipe and is used for prolonging the passing time of the absorbing medium and the medium to be absorbed in the communicating pipe. Through the mixing unit arranged in the communicating pipe, the passing duration of the absorption medium and the to-be-absorbed medium in the communicating pipe can be prolonged, so that the mutual contact duration of the absorption medium and the to-be-absorbed medium can be prolonged, the absorption medium fully absorbs the to-be-absorbed medium, and the mass transfer effect is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of gas absorption, and in particular to a gas-liquid mixed absorber. Background Art

[0002] Absorbers are needed in the fields of HVAC, energy utilization, food and medicine, petrochemicals, etc. The principle of absorbers is to use solutions to absorb gases to achieve the capture, separation or removal of one or more components. For example: in absorption refrigeration and heat pump systems, absorbers are used to absorb gas working fluids and solutions, thereby completing the entire solution cycle and achieving heat-driven efficient refrigeration and heating; in carbon capture and storage systems, absorbers are used to absorb carbon dioxide in flue gas into amine working fluids to achieve efficient capture of carbon dioxide; in air dehumidification systems, absorbers are used to absorb water vapor in the air into dehumidification solutions to achieve moisture removal and air humidity control.

[0003] Different from traditional heat exchangers, absorbers have both heat transfer and mass transfer processes: during the absorption process, one or several components in the medium to be absorbed (usually gas) migrate to the absorption medium (usually liquid), which is a mass transfer process; this mass transfer process is often accompanied by heat transfer, and most absorption processes are exothermic processes, so it is necessary to introduce a cooling medium for cooling to ensure the continuation of the absorption process, which is a heat transfer process. Whether it is a heat transfer process or a mass transfer process, it is necessary to have sufficient contact area between the absorption medium and the medium to be absorbed, and the mass transfer area required for the absorption process is often larger than the heat transfer area. Therefore, absorbers are often larger than heat exchangers with the same heat exchange power, which results in large equipment size, large liquid storage volume, and high cost, which seriously limits and hinders the practical application of absorbers.

[0004] In order to increase the contact area between the absorption medium and the medium to be absorbed, that is, the gas-liquid contact area, a bubbling absorber is provided in the related art. The improvement method of the bubbling absorber is mainly to strengthen the gas distribution, that is, the medium to be absorbed is broken into small bubbles by the gas distribution device and evenly distributed in the absorption medium. However, the inventors found that the bubbling absorber in the related art has at least the following defects: since all the medium to be absorbed is injected from the bottom of the absorber, the number of bubbles formed by the gas distribution device is huge, and with the flow of gas and liquid, the dense small bubbles will re-converge into large bubbles or even gas columns, forming a slug flow or annular flow, and the specific surface area of ​​the slug flow or annular flow increases, resulting in deterioration of heat and mass transfer. Summary of the invention

[0005] The present invention provides a gas-liquid mixing absorber, which is used to solve the defect that the specific surface area of ​​the slug flow or the annular flow in the absorber in the prior art increases, resulting in deterioration of heat and mass transfer, and improve the heat and mass transfer effect.

[0006] The present invention provides a gas-liquid mixed absorber, comprising:

[0007] The shell has three chambers arranged in sequence and independent of each other, the chambers at the two ends are respectively provided with an absorption medium inlet and an absorption medium outlet, and the chamber in the middle is provided with a cooling medium inlet and a cooling medium outlet;

[0008] A connecting pipe passes through the chamber located in the middle, and both ends of the connecting pipe are respectively connected to the chambers located at both ends;

[0009] An air distribution unit is disposed in the chamber provided with the absorption medium inlet, the air distribution unit is used to be connected to an air source providing the medium to be absorbed, and the air distribution unit is provided with air distribution holes;

[0010] The mixing unit is arranged in the connecting pipe and is used to increase the passage time of the absorption medium and the medium to be absorbed in the connecting pipe.

[0011] According to a gas-liquid mixing absorber provided by the present invention, the mixing unit includes a multi-porous structure.

[0012] According to a gas-liquid mixing absorber provided by the present invention, the multi-porous channel structure includes a mesh structure, a filamentary structure, a porous foam structure or a particle filler.

[0013] According to a gas-liquid mixing absorber provided by the present invention, the mixing unit comprises a spiral plate, which is spirally arranged in the connecting pipe along the axial direction of the connecting pipe, and the outer peripheral edge of the spiral plate abuts against the inner wall of the connecting pipe.

[0014] According to a gas-liquid mixing absorber provided by the present invention, the mixing unit includes a plate group, the plate group includes a plurality of plates, the plurality of plates are radially distributed, and the plates abut against the inner wall of the connecting pipe.

[0015] According to a gas-liquid mixing absorber provided by the present invention, there are multiple plate groups, the multiple plate groups are arranged in sequence along the axial direction of the connecting pipe, and the plates between two adjacent plate groups are arranged in a staggered manner.

[0016] According to a gas-liquid mixing absorber provided by the present invention, the mixing unit includes a plurality of baffles, each of the baffles is connected to the inner wall of the connecting pipe, each of the baffles is provided with a through hole, and the through holes of two adjacent baffles are arranged in an alternating manner.

[0017] According to a gas-liquid mixed absorber provided by the present invention, the air distribution unit includes an air distribution plate, the air distribution plate is connected to the inner wall of the chamber provided with the absorption medium inlet, there is a distance between the air distribution plate and the chamber located in the middle, the air distribution holes are arranged on the air distribution plate, the air distribution plate divides the chamber provided with the absorption medium inlet into an air inlet chamber and a liquid inlet chamber, the absorption medium inlet is connected to the liquid inlet chamber, and the air inlet chamber is provided with an air inlet.

[0018] According to a gas-liquid mixing absorber provided by the present invention, the number of the connecting pipes is plural, and the number of the air distribution holes is plural.

[0019] A gas-liquid mixed absorber provided according to the present invention further comprises a plurality of air guide tubes, one end of each of the air guide tubes is connected to the corresponding air distribution holes, and the other end of each of the air guide tubes extends into the corresponding connecting tubes.

[0020] The gas-liquid mixing absorber provided by the present invention introduces the absorption medium into the corresponding chamber through the absorption medium inlet, and the absorption medium in the chamber enters the connecting pipe. In addition, the gas source introduces the medium to be absorbed into the gas distribution unit, and the medium to be absorbed in the gas distribution unit is discharged from the gas distribution holes to form bubbles, and the bubbles enter the connecting pipe to mix with the absorption medium.

[0021] The mixing unit provided in the connecting pipe can increase the passage time of the absorption medium and the medium to be absorbed in the connecting pipe, so that the contact time between the absorption medium and the medium to be absorbed can be extended, so that the absorption medium can fully absorb the medium to be absorbed, and the mass transfer effect can be improved. In addition, the passage time of the absorption medium can also be increased, so that the absorption medium and the cooling medium can be fully contacted for heat exchange, so that the heat exchange process can be carried out more completely, the heat transfer effect can be improved, and the problem of deterioration of mass transfer and heat transfer can be reduced. After absorbing the medium to be absorbed, the absorption medium is discharged from the connecting pipe to another chamber, and finally discharged from the gas-liquid mixed absorber through the absorption medium outlet.

[0022] The cooling medium is introduced into the chamber located in the middle through the cooling medium inlet. The cooling medium surrounds the outside of the connecting pipe and can absorb the heat of the connecting pipe, thereby cooling the absorption medium in the connecting pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 is a schematic structural diagram of a gas-liquid mixed absorber provided in some embodiments of the present invention;

[0025] Figure 2 Some embodiments of the present invention provide Figure 1 AA cross-sectional view of the gas-liquid mixed absorber shown;

[0026] Figure 3 Some embodiments of the present invention provide Figure 1 A left side view of the gas-liquid mixed absorber shown;

[0027] Figure 4 Some embodiments of the present invention provide Figure 3 BB cross-sectional view of the gas-liquid mixed absorber shown

[0028] Figure 5 Some embodiments of the present invention provide Figure 4 a perspective schematic diagram of the view shown;

[0029] Figure 6 is a schematic structural diagram of a first mixing unit provided in some embodiments of the present invention;

[0030] Figure 7 is a schematic structural diagram of a second mixing unit provided in some embodiments of the present invention;

[0031] Figure 8 is a schematic structural diagram of a third mixing unit provided in some embodiments of the present invention;

[0032] Fig. 9 is a schematic structural diagram of a fourth mixing unit provided in some embodiments of the present invention;

[0033] Fig.10 is a schematic structural diagram of a fifth mixing unit provided in some embodiments of the present invention;

[0034] Fig.11 is a schematic structural diagram of a sixth mixing unit provided in some embodiments of the present invention;

[0035] Fig.12 is a schematic structural diagram of a seventh mixing unit provided in some embodiments of the present invention.

[0036] Reference numerals:

[0037] 1. Shell; 101. Chamber; 102. Absorption medium inlet; 103. Absorption medium outlet; 104. Cooling medium inlet; 105. Cooling medium outlet; 106. Cylinder; 107. End cap; 108. Closing plate; 109. Air inlet; 2. Connecting pipe; 3. Mixing unit; 301. Mesh structure; 302. Filamentary structure; 303. Porous foam structure; 304. Granular filler; 305. Spiral plate; 306. Plate; 307. Baffle; 308. Through hole; 4. Air distribution plate; 5. Air guide pipe. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] Combine the following Figures 1 to 12 A gas-liquid mixed absorber provided in an embodiment of the present invention is described.

[0040] Specifically, the gas-liquid mixed absorber includes a shell 1 , a connecting pipe 2 , a gas distribution unit and a mixing unit 3 .

[0041] The housing 1 has three chambers 101 arranged in sequence and independent of each other. The chambers 101 at both ends are provided with an absorption medium inlet 102 and an absorption medium outlet 103. The chamber 101 in the middle is provided with a cooling medium inlet 104 and a cooling medium outlet 105.

[0042] refer to Figure 4 and Figure 5 As shown, the connecting pipe 2 passes through the chamber 101 located in the middle, and both ends of the connecting pipe 2 are respectively connected to the chambers 101 located at both ends.

[0043] The air distribution unit is disposed in a chamber 101 provided with an absorption medium inlet 102, and is used to be connected to an air source providing the medium to be absorbed, and is provided with air distribution holes.

[0044] The mixing unit 3 is disposed in the connecting pipe 2 , and the mixing unit 3 is used to increase the passage time of the absorption medium and the medium to be absorbed in the connecting pipe 2 .

[0045] In the gas-liquid hybrid absorber provided in the embodiment of the present invention, the absorption medium is introduced into the corresponding chamber 101 through the absorption medium inlet 102, and the absorption medium in the chamber 101 enters the connecting pipe 2. In addition, the gas source introduces the medium to be absorbed into the gas distribution unit, and the medium to be absorbed in the gas distribution unit is discharged from the gas distribution holes to form bubbles, and the bubbles enter the connecting pipe 2 to mix with the absorption medium.

[0046] The mixing unit 3 disposed in the connecting pipe 2 can increase the passage time of the absorption medium and the medium to be absorbed in the connecting pipe 2, so that the contact time between the absorption medium and the medium to be absorbed can be extended, so that the absorption medium can fully absorb the medium to be absorbed, and the mass transfer effect can be improved. In addition, the passage time of the absorption medium can also be increased, and the heat exchange time between the absorption medium and the cooling medium can be extended, and the heat transfer effect can be improved, thereby reducing the problem of deterioration of mass transfer and heat transfer. After absorbing the medium to be absorbed, the absorption medium is discharged from the connecting pipe 2 to another chamber 101, and finally discharged from the gas-liquid mixed absorber through the absorption medium outlet 103.

[0047] The cooling medium is introduced into the chamber 101 located in the middle through the cooling medium inlet 104. The cooling medium is surrounded by the outer side of the connecting pipe 2 and can absorb the heat of the connecting pipe 2, thereby cooling the absorption medium in the connecting pipe 2. It should be noted that the absorption medium in the connecting pipe 2 and the cooling medium in the chamber 101 can be heat exchanged in the form of parallel flow heat exchange, counter flow heat exchange, mixed flow heat exchange or cross flow heat exchange.

[0048] In some embodiments provided by the present invention, the shell 1 includes a cylinder 106 , a pair of sealing heads 107 and a pair of sealing plates 108 .

[0049] A pair of sealing heads 107 are respectively sealed at both ends of the cylinder 106 to form a cavity structure, a pair of sealing plates 108 are arranged in the cavity structure, and there is a distance between the pair of sealing plates 108. The pair of sealing plates 108 and the sealing plates 108 and the sealing heads 107 respectively form corresponding chambers 101. The connecting pipe 2 is arranged between the pair of sealing plates 108, and the two ends of the connecting pipe 2 pass through the pair of sealing plates 108 respectively.

[0050] In some embodiments provided by the present invention, the mixing unit 3 includes a multi-porous structure. By arranging a multi-porous structure in the connecting tube 2, when the absorption medium and the medium to be absorbed circulate in the multi-porous structure, the pores of the multi-porous structure can limit the size of the bubbles discharged by the air distribution unit, reduce the problem of small-sized bubbles converging into large-sized bubbles, and the medium to be absorbed contacts the absorption medium in the form of small-sized bubbles, so that there is a larger contact area between the two, thereby improving the mass transfer efficiency. In addition, the flow channel in the multi-porous structure is curved and changeable, so that the flow direction of the absorption medium is always changing, thereby achieving the effect of stirring the absorption medium and the medium to be absorbed. In addition, the multi-porous structure is arranged inside the connecting tube 2 and contacts the inner wall of the connecting tube 2, so that part of the heat of the absorption medium can be transferred to the multi-porous structure, and then transferred from the multi-porous structure to the tube wall of the connecting tube 2, thereby increasing the heat exchange area and enhancing the heat transfer effect.

[0051] refer to Figure 6 As shown, optionally, the multi-porous structure includes a mesh structure 301. The mesh structure 301 can divide the bubbles, thereby dividing the bubbles into smaller bubbles, thereby increasing the contact area between the absorption medium and the medium to be absorbed.

[0052] Further, the mesh structure 301 is wound into a columnar structure and extends into the connecting pipe 2. Alternatively, the number of the mesh structure 301 is multiple layers, and the multiple layers of mesh structure 301 are sequentially arranged along the axial direction of the connecting pipe 2. Alternatively, the number of the mesh structure 301 is multiple layers, and the multiple layers of mesh structure 301 are sequentially arranged along the diameter direction of the connecting pipe 2.

[0053] Of course, the multi-porous structure is not limited to the above-mentioned mesh structure 301. Figure 7 As shown, in other embodiments provided by the present invention, the multi-porous structure may also include a filamentous structure 302. The filamentous structure 302 can divide the bubbles into smaller bubbles, thereby increasing the contact area between the absorption medium and the medium to be absorbed.

[0054] Optionally, the filament structure 302 is formed by weaving thin wires, which can be referred to as steel wool. The thin wires can be metal wires or non-metal wires.

[0055] Of course, the multi-porous structure is not limited to the filamentary structure 302. Figure 8 As shown, in other embodiments provided by the present invention, the multi-porous channel structure may also include a porous foam structure 303. Optionally, the porous foam structure 303 may be a foam metal. Of course, the material of the porous foam structure 303 may also be plastic.

[0056] Of course, the multi-porous channel structure is not limited to the above-mentioned porous foam structure 303. Fig. 9As shown, in other embodiments provided by the present invention, the multi-porous structure includes a particle filler 304, that is, the particle filler 304 is filled in the connecting tube 2, and the gaps between the particle fillers 304 form channels for the absorption medium and the medium to be absorbed to pass through. The material of the particle filler 304 can be selected according to needs.

[0057] Furthermore, any two or three of the mesh structure 301 , the filament structure 302 , the porous foam structure 303 and the particle filler 304 may be disposed in the connecting pipe 2 at the same time.

[0058] Of course, the mixing unit 3 is not limited to the above-mentioned multi-porous structure. Fig.10 As shown, in some embodiments provided by the present invention, the mixing unit 3 includes a spiral plate. The spiral plate 305 is spirally arranged in the connecting pipe 2 along the axial direction of the connecting pipe 2, and the outer peripheral edge of the spiral plate 305 abuts against the inner wall of the connecting pipe 2.

[0059] During use, under the guidance of the spiral plate 305, the absorption medium and the medium to be absorbed in the connecting tube 2 move in a spiral motion. This can, on the one hand, form a stirring effect on the absorption medium and the medium to be absorbed, thereby improving the efficiency of the absorption medium in absorbing the medium to be absorbed and putting the absorption medium in a turbulent state. On the other hand, it extends the travel path of the absorption medium and the medium to be absorbed, thereby increasing the contact time between the two, so that the absorption medium can more fully absorb the medium to be absorbed.

[0060] In addition, the spiral plate 305 is arranged inside the connecting tube 2 and contacts the inner wall of the connecting tube 2, so part of the heat of the absorption medium can be transferred to the spiral plate 305, and then transferred to the tube wall of the connecting tube 2 by the spiral plate 305, thereby increasing the heat exchange area and enhancing the heat transfer effect.

[0061] Of course, the mixing unit 3 is not limited to the above-mentioned spiral plate 305. For example, Fig.11 As shown, in other embodiments provided by the present invention, the mixing unit 3 includes a plate group. The plate group includes a plurality of plates 306, and the plurality of plates 306 are radially distributed, and the plates 306 are against the inner wall of the connecting pipe 2.

[0062] The bubbles can be divided by a plurality of plates 306, so that the bubbles are divided into smaller bubbles, thereby increasing the contact area between the absorption medium and the medium to be absorbed. In addition, the plates 306 are arranged inside the connecting tube 2 and contact the inner wall of the connecting tube 2, so that part of the heat of the absorption medium can be transferred to the plates 306, and then transferred from the plates 306 to the tube wall of the connecting tube 2, thereby increasing the heat exchange area and enhancing the heat transfer effect.

[0063] refer to Fig.11As shown, further, there are multiple plate groups, and the multiple plate groups are arranged in sequence along the axial direction of the connecting pipe 2, and the plates 306 between two adjacent plate groups are arranged in a staggered manner.

[0064] So set up, refer to Fig.11 As shown, in the flow direction of the absorption medium, the bubbles passing between two adjacent plates 306 of the upstream plate group can be divided by the plates 306 of the downstream plate group, that is, by staggering the plates 306 of the two adjacent groups, the bubble division effect can be improved, thereby increasing the contact area between the absorption medium and the medium to be absorbed, and improving the mass transfer effect.

[0065] Of course, the form of the mixing unit 3 is not limited to the above-mentioned plate group, for example, Fig.12 As shown, in some embodiments provided by the present invention, the mixing unit 3 includes a plurality of baffles 307, each baffle 307 is connected to the inner wall of the connecting pipe 2, each baffle 307 is provided with a through hole 308, and the through holes 308 of two adjacent baffles 307 are arranged in an alternating manner.

[0066] With such arrangement, under the action of the baffle 307, the absorption medium moves along a curved path in the connecting pipe 2. This can, on the one hand, form a stirring and mixing effect on the absorption medium and the medium to be absorbed, thereby improving the efficiency of the absorption medium in absorbing the medium to be absorbed and making the absorption medium in a turbulent state. On the other hand, it extends the travel path of the absorption medium and the medium to be absorbed, so that the contact time between the two is increased, so that the absorption medium can more fully absorb the medium to be absorbed. In addition, during the travel, the bubbles collide with the baffle 307, causing the bubbles to decompose into small bubbles, thereby increasing the contact area between the absorption medium and the medium to be absorbed and improving the mass transfer effect. In addition, the baffle 307 is arranged inside the connecting pipe 2 and contacts the inner wall of the connecting pipe 2, so that part of the heat of the absorption medium can be transferred to the baffle 307, and then transferred to the tube wall of the connecting pipe 2 by the baffle 307, thereby increasing the heat exchange area and enhancing the heat transfer effect.

[0067] Optionally, a plurality of through holes 308 are provided on the baffle plate 307 , and the through holes 308 between two adjacent baffle plates 307 are arranged in a staggered manner.

[0068] In some embodiments provided by the present invention, the air distribution unit includes an air distribution plate 4. The air distribution plate 4 is connected to the inner wall of the chamber 101 provided with the absorption medium inlet 102, and there is a distance between the air distribution plate 4 and the chamber 101 located in the middle. The air distribution holes are arranged on the air distribution plate 4, and the air distribution plate 4 divides the chamber 101 provided with the absorption medium inlet 102 into an air inlet chamber and a liquid inlet chamber, the absorption medium inlet 102 is connected with the liquid inlet chamber, and the air inlet chamber is provided with an air inlet 109.

[0069] During use, the absorption medium enters the liquid inlet cavity from the absorption medium inlet 102, and the absorption medium in the liquid inlet cavity enters the connecting pipe 2. The medium to be absorbed enters the air inlet cavity from the air inlet 109, and the gas in the air inlet cavity is discharged through the air distribution holes of the air distribution plate 4, and enters the connecting pipe 2 through the liquid inlet cavity.

[0070] In this way, the air inlet cavity and the liquid inlet cavity are both arranged in the shell 1, so that the structure of the gas-liquid mixing absorber is compact.

[0071] Specifically, refer to Figure 2 or Figure 4 As shown, the air distribution plate 4 is arranged between the corresponding sealing plate 108 and the sealing head 107, the space between the air distribution plate 4 and the sealing plate 108 constitutes a liquid inlet cavity, and the absorption medium inlet 102 is arranged between the air distribution plate 4 and the sealing plate 108. The space between the air distribution plate 4 and the sealing head 107 constitutes an air inlet cavity, and the air inlet 109 is arranged on the sealing head 107.

[0072] In some embodiments provided by the present invention, there are multiple connecting pipes 2 and multiple air distribution holes. Such an arrangement can improve the mass transfer and heat transfer efficiency of the gas-liquid hybrid absorber.

[0073] Furthermore, the gas-liquid hybrid absorber further includes a plurality of air guide tubes 5. One end of the air guide tube 5 is connected to the corresponding air distribution hole, and the other end of the air guide tube 5 extends into the corresponding connecting tube 2. With such a configuration, the medium to be absorbed can be evenly distributed to each connecting tube 2, thereby enhancing the mass transfer effect and reducing the problem that the medium to be absorbed is concentrated into one or some connecting tubes 2, resulting in the absorption medium being unable to absorb the concentrated medium to be absorbed.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A gas-liquid mixed absorber, characterized in that: include: A shell (1) is provided with three chambers (101) arranged in sequence and independent of each other, the chambers (101) at the two ends are respectively provided with an absorption medium inlet (102) and an absorption medium outlet (103), and the chamber (101) at the middle is provided with a cooling medium inlet (104) and a cooling medium outlet (105); A connecting pipe (2) passes through the chamber (101) located in the middle, and two ends of the connecting pipe (2) are respectively connected to the chambers (101) located at the two ends; an air distribution unit, arranged in the chamber (101) provided with the absorption medium inlet (102), the air distribution unit being used to be connected to an air source providing the medium to be absorbed, and the air distribution unit being provided with air distribution holes; The mixing unit (3) is arranged in the connecting pipe (2) and is used to increase the passage time of the absorption medium and the medium to be absorbed in the connecting pipe (2).

2. The gas-liquid mixed absorber according to claim 1, characterized in that: The mixing unit (3) comprises a multi-porous structure.

3. The gas-liquid mixed absorber according to claim 2, characterized in that: The multi-porous structure includes a mesh structure (301), a filamentous structure (302), a porous foam structure (303) or a particle filler (304).

4. The gas-liquid mixed absorber according to claim 1, characterized in that: The mixing unit (3) comprises a spiral plate (305) which is spirally arranged in the connecting tube (2) along the axial direction of the connecting tube (2), and the outer peripheral edge of the spiral plate (305) abuts against the inner wall of the connecting tube (2).

5. The gas-liquid mixed absorber according to claim 1, characterized in that: The mixing unit (3) comprises a plate group, wherein the plate group comprises a plurality of plates (306), the plurality of plates (306) are radially distributed, and the plates (306) abut against the inner wall of the connecting pipe (2).

6. The gas-liquid mixed absorber according to claim 5, characterized in that: There are a plurality of plate groups, and the plurality of plate groups are arranged in sequence along the axial direction of the connecting pipe (2), and the plates (306) between two adjacent plate groups are arranged in a staggered manner.

7. The gas-liquid mixed absorber according to claim 1, characterized in that: The mixing unit (3) comprises a plurality of baffles (307), each of the baffles (307) being connected to the inner wall of the connecting pipe (2), each of the baffles (307) being provided with a through hole (308), and the through holes (308) of two adjacent baffles (307) being arranged in a staggered manner.

8. The gas-liquid mixed absorber according to any one of claims 1 to 7, characterized in that: The air distribution unit comprises an air distribution plate (4), the air distribution plate (4) being connected to the inner wall of the chamber (101) provided with the absorption medium inlet (102), a distance being provided between the air distribution plate (4) and the chamber (101) located in the middle, the air distribution holes being provided on the air distribution plate (4), the air distribution plate (4) dividing the chamber (101) provided with the absorption medium inlet (102) into an air inlet chamber and a liquid inlet chamber, the absorption medium inlet (102) being connected to the liquid inlet chamber, and the air inlet chamber being provided with an air inlet (109).

9. The gas-liquid mixed absorber according to claim 8, characterized in that: The number of the connecting pipes (2) is multiple, and the number of the air distribution holes is multiple.

10. The gas-liquid mixed absorber according to claim 9, characterized in that: It also comprises a plurality of air guide tubes (5), one end of each of the air guide tubes (5) being connected to the corresponding air distribution hole and the other end of each of the air guide tubes (5) extending into the corresponding connecting tube (2).

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