Spiral absorber

Abstract

The present application relates to the field of gas absorption, and provides a spiral absorber, comprising: a shell for containing absorption medium, the shell being provided with an absorption medium inlet and an absorption medium outlet; a heat exchange pipe comprising a heat exchange spiral section, the heat exchange spiral section being spirally arranged in the shell along the axial direction of the shell, the heat exchange pipe being used for the circulation of cooling medium; a gas distribution unit arranged in sequence with the heat exchange spiral section along the axial direction of the shell, the gas distribution unit being used for being connected with a gas source providing the medium to be absorbed, the gas distribution unit being provided with a gas distribution hole; and a gas supplement unit connected with the gas distribution unit and extending towards the direction of the heat exchange spiral section of the heat exchange pipe, the gas supplement unit being provided with a plurality of gas supplement holes along the extending direction of the gas supplement unit. Through the plurality of gas supplement holes of the gas supplement unit, gas is supplemented at different positions respectively, which can not only increase the contact area of the medium to be absorbed and the absorption medium, but also reduce the problem that the contact area of the medium to be absorbed and the absorption medium is reduced due to the merging of bubbles into large bubbles during the rising of the bubbles, thereby improving the mass transfer efficiency.

Description

Technical Field

[0001] This invention relates to the field of gas absorption technology, and more particularly to a spiral absorber. Background Technology

[0002] Absorbers are needed in fields such as HVAC, energy utilization, food and pharmaceuticals, and petrochemicals. The principle of an absorber is to use a solution to absorb gas, achieving the capture, separation, or removal of one or more components. For example, in absorption refrigeration and heat pump systems, absorbers are used to absorb the gaseous working fluid and the solution, thus completing the entire solution cycle and achieving heat-driven, high-efficiency refrigeration and heating; in carbon capture and storage systems, absorbers are used to absorb carbon dioxide from flue gas into an amine working fluid, achieving efficient carbon dioxide capture; and in air dehumidification systems, absorbers are used to absorb water vapor from the air into a dehumidification solution, achieving moisture removal and air humidity control.

[0003] Unlike traditional heat exchangers, absorbers involve both heat and mass transfer processes simultaneously: during absorption, one or more components from the absorbable medium (usually a gas) migrate into the absorbant medium (usually a liquid), which is the mass transfer process. This mass transfer process is often accompanied by heat transfer, and since most absorption processes are exothermic, a cooling medium is needed to ensure the continuous operation of the absorption process, which is the heat transfer process. Both heat and mass transfer processes require sufficient contact area between the absorbant and absorbable media, and the mass transfer area required for absorption is often larger than the heat transfer area. Therefore, absorbers are often larger than heat exchangers with the same heat exchange capacity, resulting in bulky equipment, large liquid storage capacity, and high cost, severely limiting and hindering the practical application of absorbers.

[0004] To increase the contact area between the absorbent medium and the absorbent medium, i.e., the gas-liquid contact area, bubbling absorbers have been provided in related technologies. The main improvement method for bubbling absorbers is to enhance gas distribution, that is, to break the absorbent medium into small bubbles and evenly distribute them in the absorbent medium using a gas distribution device. However, the inventors have found that bubbling absorbers in related technologies have at least the following drawbacks: On the one hand, since all the absorbent medium is injected from the bottom of the absorber, the number of bubbles formed by the gas distribution device is enormous. As the gas and liquid flow, the dense small bubbles will re-aggregate into large bubbles or even gas columns, forming slug flows, plug flows, annular flows, etc., with a large specific surface area, leading to deterioration of heat and mass transfer; on the other hand, the inlet section of the absorbent medium experiences severe disturbance, forming turbulence, thus the heat and mass transfer efficiency in the front section of the absorber is high. However, as the gas and liquid flow gradually stabilizes, laminar flow is formed, thus the heat and mass transfer in the middle and rear sections of the absorber deteriorates. Summary of the Invention

[0005] This invention provides a spiral absorber to solve or improve the defect in related technologies where bubbles in bubbling absorbers tend to converge during their ascent, leading to deterioration of heat and mass transfer, thereby improving heat and mass transfer efficiency.

[0006] This invention provides a spiral absorber, comprising:

[0007] A housing for containing an absorbent medium, the housing having an absorbent medium inlet and an absorbent medium outlet;

[0008] A heat exchange tube, the heat exchange tube including a heat exchange spiral section, the heat exchange spiral section being spirally arranged inside the shell along the axial direction of the shell, the heat exchange tube being used for the flow of cooling medium;

[0009] A gas distribution unit is provided, wherein the gas distribution unit and the heat exchange spiral section are arranged sequentially along the axial direction of the shell, the gas distribution unit is used to connect to the gas source that provides the medium to be absorbed, and the gas distribution unit is provided with gas distribution holes.

[0010] The gas supply unit is connected to the gas distribution unit and extends in the direction of the heat exchange spiral section of the heat exchange tube. The gas supply unit is provided with multiple gas supply holes along its own extension direction.

[0011] According to a spiral absorber provided by the present invention, the number of heat exchange tubes is multiple, wherein at least two of the heat exchange spiral segments have the same diameter, and the heat exchange spiral segments with the same diameter are arranged in parallel to each other.

[0012] According to a spiral absorber provided by the present invention, there are multiple heat exchange tubes, wherein the diameter of a portion of the heat exchange spiral segments is larger than the diameter of another portion of the heat exchange spiral segments, and the heat exchange spiral segments with larger diameters are fitted outside the heat exchange spiral segments with smaller diameters.

[0013] According to a spiral absorber provided by the present invention, the housing has three independent chambers arranged sequentially along the axial direction of the housing. The gas distribution unit, the gas replenishment unit and the heat exchange spiral section are all located in the middle chamber of the three chambers. The absorption medium inlet and the absorption medium outlet are both connected to the middle chamber.

[0014] The two ends of the heat exchange spiral section are respectively connected to the chambers located at both ends of the three chambers. The shell is provided with a cooling medium inlet and a cooling medium outlet, and the cooling medium inlet and the cooling medium outlet are respectively connected to the chambers located at both ends.

[0015] According to a spiral absorber provided by the present invention, the housing includes a cylindrical body, a pair of end caps and a pair of sealing plates. The pair of end caps are respectively sealed at both ends of the cylindrical body, the pair of sealing plates are disposed in the cylindrical body and there is a gap between the pair of sealing plates, the pair of end caps are respectively provided with a cooling medium inlet and a cooling medium outlet, and the chambers are formed between the pair of sealing plates and between the sealing plates and the end caps.

[0016] According to a spiral absorber provided by the present invention, the gas distribution unit includes a gas distribution plate, the gas distribution plate is connected to the inner wall of the housing, the gas distribution hole is disposed on the gas distribution plate, the housing is provided with an air inlet, the air inlet is disposed on the side of the gas distribution plate away from the heat exchange spiral section, and is used to introduce the medium to be absorbed into the side of the gas distribution plate away from the heat exchange spiral section.

[0017] According to a spiral absorber provided by the present invention, the gas replenishment unit includes a gas replenishment pipe, one end of which is connected to the gas distribution unit, the other end of which is closed and extends toward the location of the heat exchange tube, and the gas replenishment hole is provided on the pipe wall of the gas replenishment pipe.

[0018] According to a spiral absorber provided by the present invention, at least a portion of the air supply pipe has a curved axis.

[0019] According to a spiral absorber provided by the present invention, the gas supply pipe includes a spirally arranged gas supply spiral section;

[0020] The gas supply spiral section of the gas supply pipe and the heat exchange spiral section of the heat exchange pipe have the same diameter and are arranged parallel to each other. Alternatively, the diameter of the gas supply spiral section of the gas supply pipe is greater than or less than the diameter of the heat exchange spiral section of the heat exchange pipe. The gas supply spiral section of the gas supply pipe is fitted onto the outside or inside of the heat exchange spiral section of the heat exchange pipe.

[0021] According to a spiral absorber provided by the present invention, the number of gas supply pipes is multiple, and at least some of the gas supply pipes are straight pipes.

[0022] According to a spiral absorber provided by the present invention, the orifice size of the gas replenishment hole at the end of the gas replenishment unit near the inlet of the absorption medium is larger than the orifice size of the gas replenishment hole at the end of the gas replenishment unit near the outlet of the absorption medium.

[0023] And / or, the number of air supply holes at the end of the air supply unit near the inlet of the absorption medium is greater than the number of air supply holes at the end of the air supply unit near the outlet of the absorption medium.

[0024] The spiral absorber provided by this invention allows the absorption medium to be introduced into the shell through the absorption medium inlet. After absorbing the medium to be absorbed within the shell, the absorption medium is discharged from the absorption medium outlet. The heat exchange tubes are used for the flow of cooling medium, and the heat exchange spiral section of the heat exchange tubes is disposed within the shell to cool the absorption medium. The spiral arrangement of the heat exchange spiral section increases the contact area between the heat exchange spiral section and the absorption medium, thereby improving the cooling effect on the absorption medium.

[0025] The gas source introduces the medium to be absorbed into the gas distribution unit. Some of the medium to be absorbed in the gas distribution unit is discharged from the gas distribution hole into the shell to form bubbles, which are then absorbed by the absorption medium, thereby increasing the mass transfer area between the absorption medium and the medium to be absorbed and enhancing mass transfer.

[0026] The remaining absorbable medium enters the gas replenishment unit, runs along the gas replenishment unit, and is discharged from each gas replenishment hole of the gas replenishment unit. By replenishing gas at different locations through multiple gas replenishment holes distributed along the extension direction of the gas replenishment unit, the contact area between the absorbable medium and the absorbent medium can be increased, and the problem of the contact area between the absorbable medium and the absorbent medium being reduced due to the merging of bubbles into large bubbles during the rising process can be reduced, thereby improving the mass transfer efficiency.

[0027] In addition, the air replenishment unit replenishes air at different locations through multiple air replenishment holes. Under the stirring effect of the airflow injected from the air distribution holes at various locations, the absorption medium inside the shell is basically in a turbulent state. This not only enables the medium to be absorbed to dissolve quickly into the absorption medium, but also accelerates the heat exchange efficiency between the absorption medium and the cooling medium, reducing the problem of mass and heat transfer deterioration under laminar flow conditions. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of the spiral absorber provided in some embodiments of the present invention;

[0030] Figure 2 These are provided in some embodiments of the present invention. Figure 1 Sectional view AA shown in the view;

[0031] Figure 3 These are provided in some embodiments of the present invention. Figure 2 A magnified view of point I in the view shown;

[0032] Figure 4This is an exploded structural diagram of a spiral absorber provided in some embodiments of the present invention.

[0033] Figure label:

[0034] 1. Shell; 101. Absorbent medium inlet; 102. Absorbent medium outlet; 103. Cylinder; 104. End cap; 105. Sealing plate; 106. Chamber; 107. Air inlet; 108. Cooling medium outlet; 109. Cooling medium inlet; 2. Heat exchange tube; 201. Heat exchange spiral section; 202. Heat exchange connection section; 3. Air distribution plate; 301. Air distribution hole; 4. Straight pipe; 5. Air replenishment spiral section; 6. Air replenishment connection section; 7. Air replenishment hole. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0036] The following is combined with Figures 1 to 4 The spiral absorber provided in the embodiments of the present invention is described.

[0037] Specifically, the spiral absorber includes a shell 1, a heat exchange tube 2, a gas distribution unit, and a gas replenishment unit.

[0038] The housing 1 is used to contain the absorbent medium. The housing 1 is provided with an absorbent medium inlet 101 for the absorbent medium to enter and an absorbent medium outlet 102 for the absorbent medium to exit. The absorbent medium inlet 101 and the absorbent medium outlet 102 are respectively located near both ends of the housing 1.

[0039] The heat exchange tube 2 includes a heat exchange spiral section 201. The heat exchange spiral section 201 of the heat exchange tube 2 is spirally arranged within the shell 1 along the axial direction. The heat exchange tube 2 is used for the flow of the cooling medium. It should be noted that the axial direction of the shell 1 is also the flow direction of the absorption medium within the shell 1. It should also be noted that the heat exchange tube 2 can exchange heat with the absorption medium within the shell 1 using methods such as co-current heat exchange, counter-current heat exchange, mixed-flow heat exchange, or cross-flow heat exchange.

[0040] The gas distribution unit is housed within the casing 1, and the gas distribution unit and the heat exchange spiral section 201 are arranged sequentially along the axial direction of the casing 1. The gas distribution unit is used to connect to the gas source providing the absorbent medium, and the gas distribution unit is provided with gas distribution holes 301. (Reference) Figure 2As shown, during use, the axial direction of the shell 1 is set vertically, the absorption medium inlet 101 is set near the bottom of the shell 1, the absorption medium outlet 102 is set near the top of the shell 1, and the air distribution unit is set below the heat exchange spiral section 201.

[0041] The gas supply unit is connected to the gas distribution unit, and the gas supply unit extends in the direction of the heat exchange spiral section 201 of the heat exchange tube 2. The gas supply unit is provided with multiple gas supply holes 7 along its own extension direction.

[0042] The spiral absorber provided in this embodiment of the invention allows the absorption medium to be introduced into the shell 1 through the absorption medium inlet 101. After absorbing the medium to be absorbed within the shell 1, the absorption medium is discharged from the absorption medium outlet 102. The heat exchange tube 2 is used for the flow of cooling medium, and the heat exchange spiral section 201 of the heat exchange tube 2 is disposed within the shell 1 to cool the absorption medium. The spiral structure of the heat exchange spiral section 201 extends the path of the heat exchange tube 2 within the shell, thereby increasing the contact area between the heat exchange spiral section 201 and the absorption medium, and improving the cooling effect on the absorption medium.

[0043] The gas source introduces the medium to be absorbed into the gas distribution unit. Part of the medium to be absorbed in the gas distribution unit is discharged from the gas distribution hole 301 into the shell 1 to form bubbles and be absorbed by the absorption medium, thereby increasing the mass transfer area between the absorption medium and the medium to be absorbed and enhancing mass transfer.

[0044] The remaining absorbable medium enters the gas replenishment unit, runs along the gas replenishment unit, and is discharged from each gas replenishment hole 7 of the gas replenishment unit. By replenishing gas at different positions through multiple gas replenishment holes 7 distributed along the extension direction of the gas replenishment unit, the contact area between the absorbable medium and the absorbent medium can be increased, and the problem of the contact area between the absorbable medium and the absorbent medium being reduced due to the merging of bubbles into large bubbles during the rising process can be reduced, thereby improving the mass transfer efficiency.

[0045] In addition, the air replenishment unit replenishes air at different locations through multiple air replenishment holes 7. Under the stirring effect of the airflow injected by the air distribution holes 301 at each location, the absorption medium inside the shell 1 is basically in a turbulent state. This can not only make the medium to be absorbed dissolve quickly in the absorption medium, but also accelerate the heat exchange efficiency between the absorption medium and the cooling medium, and reduce the problem of mass and heat transfer deterioration under laminar flow conditions.

[0046] refer to Figure 4 As shown, in some embodiments provided by the present invention, there are multiple heat exchange tubes 2, wherein at least two heat exchange spiral segments 201 have the same diameter, and the heat exchange spiral segments 201 with the same diameter are arranged in parallel to each other, that is, the spiral helix angle and pitch of the heat exchange spiral segments 201 with the same diameter are the same, and the heat exchange spiral segments 201 with the same diameter are arranged sequentially along the axial direction of the shell.

[0047] In this embodiment, by simultaneously conveying the cooling medium through multiple heat exchange tubes 2, the flow rate of the cooling medium flowing through the shell 1 can be increased, and the heat exchange area within the shell 1 can be increased, thereby improving the cooling effect on the absorption medium. By arranging the heat exchange spiral segments 201 of the same diameter in parallel, that is, by sequentially arranging the heat exchange spiral segments 201 of the same diameter along the axial direction of the shell 1, the axial space of the shell 1 can be fully utilized, increasing the number of heat exchange tubes 2 along the axial direction of the shell 1 and improving the heat exchange efficiency.

[0048] Of course, heat exchanger 2 is not limited to the above configuration; for example, refer to... Figure 4 As shown, in other embodiments provided by the present invention, there are multiple heat exchange tubes 2, wherein the diameter of a portion of the heat exchange spiral segments 201 is larger than the diameter of another portion of the heat exchange spiral segments 201, and the heat exchange spiral segments 201 with larger diameters are fitted outside the heat exchange spiral segments 201 with smaller diameters.

[0049] In this embodiment, by simultaneously conveying the cooling medium through multiple heat exchange tubes 2, the flow rate of the cooling medium flowing through the shell 1 can be increased, and the heat exchange area within the shell 1 can be increased, thereby improving the cooling effect on the absorption medium. By sequentially assembling heat exchange spiral segments 201 of different diameters from the inside out, that is, sequentially assembling heat exchange spiral segments 201 of different diameters along the transverse direction of the shell 1, the transverse space of the shell 1 can be fully utilized, increasing the number of heat exchange tubes 2 in the transverse direction of the shell 1 and improving heat exchange efficiency. Of course, this embodiment can be used in conjunction with the previous embodiment.

[0050] refer to Figure 2 As shown, in some embodiments provided by the present invention, the housing 1 has three independent chambers 106 arranged sequentially along the axial direction of the housing 1. The gas distribution unit, the gas replenishment unit, and the heat exchange spiral section 201 are all located in the middle chamber 106 of the three chambers 106, and the absorption medium inlet 101 and the absorption medium outlet 102 are both connected to the middle chamber 106.

[0051] The two ends of the heat exchange spiral section 201 are respectively connected to the two chambers 106 located at the two ends of the three chambers 106. The shell 1 is provided with a cooling medium inlet 109 and a cooling medium outlet 108, which are respectively connected to the two chambers 106 located at the two ends.

[0052] During operation, cooling medium is introduced through cooling medium inlet 109 and enters the chamber 106 at the first end of the shell 1. The cooling medium in the chamber 106 at the first end of the shell 1 then enters each heat exchange tube 2 and, after exchanging heat with the absorption medium, enters the chamber 106 at the second end of the shell 1. Finally, it is discharged from the cooling medium outlet 108.

[0053] With this configuration, cooling medium can be introduced into all heat exchange tubes 2 through a single cooling medium inlet 109, and the cooling medium discharged from all heat exchange tubes 2 can be discharged through a single cooling medium outlet 108. This makes the spiral absorber simple and compact in structure, and easy to connect to the cooling medium supply device.

[0054] refer to Figure 2 and Figure 4 As shown, in some embodiments provided by the present invention, the housing 1 includes a cylindrical body 103, a pair of end caps 104 and a pair of end plates 105.

[0055] A pair of end caps 104 are respectively sealed at both ends of the cylinder 103, and a pair of end plates 105 are disposed inside the cylinder 103, with a gap between them. Each pair of end caps 104 has a cooling medium inlet 109 and a cooling medium outlet 108. The spaces between the end plates 105 and between the end plates 105 and the end caps 104 respectively form corresponding chambers 106. Specifically, the gas distribution unit, the gas replenishment unit, the heat exchange spiral section 201, the absorption medium inlet 101, and the absorption medium outlet 102 are all disposed between the pair of end plates 105. This arrangement results in a simple heat exchanger structure and low manufacturing difficulty.

[0056] Optionally, the cylinder 103 and the end cap 104 can be welded or threaded together. The cylinder 103 and the end cap 105 can also be welded or threaded together.

[0057] refer to Figure 2 and Figure 4 As shown, optionally, the heat exchange tube 2 also includes a heat exchange connection section 202. The two ends of the heat exchange spiral section 201 of the heat exchange tube 2 are respectively connected to the corresponding heat exchange connection section 202, and the heat exchange connection sections 202 at both ends of the heat exchange spiral section 201 pass through a pair of end caps 105 and are respectively connected to a pair of end caps 104.

[0058] During operation, the cooling medium enters the first end cap 104 through the cooling medium inlet 109. The cooling medium inside the first end cap 104 then passes through the heat exchange connection section 202 at the first end of the heat exchange spiral section 201 and enters the heat exchange spiral section 201. The cooling medium discharged from the heat exchange spiral section 201 passes through the heat exchange connection section 202 at the second end of the heat exchange spiral section 201 and enters the second end cap 104, finally exiting through the cooling medium outlet 108 on the second end cap 104.

[0059] In some embodiments of the present invention, the gas distribution unit includes a gas distribution plate 3. The gas distribution plate 3 is connected to the inner wall of the housing 1, and gas distribution holes 301 are provided on the gas distribution plate 3. The housing 1 is provided with an air inlet 107 for the medium to be absorbed to enter. The air inlet 107 is located on the side of the gas distribution plate 3 away from the heat exchange spiral section 201, and is used to introduce the medium to be absorbed into the side of the gas distribution plate 3 away from the heat exchange spiral section 201. With this configuration, the structure of the gas distribution plate is simple, and multiple gas distribution holes can be provided on the gas distribution plate to achieve uniform gas distribution.

[0060] During use, the medium to be absorbed is introduced through the air inlet 107. The medium enters the side of the air distribution plate 3 away from the spiral heat exchange section, and then is discharged through the air distribution holes 301 of the air distribution plate 3 to achieve the effect of air distribution.

[0061] refer to Figure 2 As shown, further, an air inlet chamber is formed between the side of the air distribution plate 3 away from the heat exchange spiral section 201 and the corresponding sealing plate 105. The air inlet 107 is connected to the air inlet chamber, that is, the medium to be absorbed is introduced through the air inlet 107 into the air inlet chamber, and the medium to be absorbed in the air inlet chamber is discharged from the air distribution hole 301 into the side of the air distribution plate 3 near the heat exchange spiral section 201. The heat exchange connecting section 202 passes through the air distribution plate 3, the air inlet chamber and the sealing plate 105 in sequence and is connected to the interior of the corresponding end cap 104.

[0062] In some embodiments provided by the present invention, the gas replenishment unit includes a gas replenishment pipe. One side of the gas replenishment pipe is connected to the gas replenishment unit, and the other end of the gas replenishment pipe is closed and extends in the direction of the heat exchange tube 2. The pipe wall of the gas replenishment pipe is provided with gas replenishment holes 7. With this configuration, the structure of the gas replenishment pipe is simple.

[0063] In some embodiments provided by the present invention, at least a portion of the gas supply pipe has a curved axis. This configuration extends the path length of the gas supply pipe within the housing 1, thereby increasing the gas supply range of the gas supply pipe. This, in turn, improves mass transfer efficiency and increases the disturbance range of the absorption medium within the housing 1, causing the absorption medium within the housing 1 to be in a turbulent state, thus improving heat and mass transfer efficiency.

[0064] refer to Figures 2-4 As shown, in some embodiments provided by the present invention, the air supply pipe includes a spirally arranged air supply spiral section 5.

[0065] Optionally, the gas supply spiral section 5 of the gas supply pipe and the heat exchange spiral section 201 of the heat exchange pipe 2 have the same diameter and are arranged parallel to each other.

[0066] Alternatively, the diameter of the gas supply spiral section 5 of the gas supply pipe is greater than or less than the diameter of the heat exchange spiral section 201 of the heat exchange tube 2, and the gas supply spiral section 5 of the gas supply pipe is fitted on the outside or inside of the heat exchange spiral section 201 of the heat exchange tube 2.

[0067] This configuration, where the gas supply spiral section 5 and the heat exchange spiral section 201 are arranged in parallel or nested inside and outside, can make full use of the internal space of the shell 1.

[0068] refer to Figure 3 As shown, optionally, the air supply pipe also includes an air supply connection section 6. The end of the air supply spiral section 5 near the air distribution plate 3 is connected to the air supply connection section. The air supply connection section 6 passes through the air distribution plate 3 and communicates with the air intake chamber.

[0069] In some embodiments provided by the present invention, there are multiple air supply tubes, and at least some of the air supply tubes are straight tubes 4. This configuration simplifies the structure of the air supply tubes.

[0070] Optionally, refer to Figure 2 and Figure 4 As shown, there are at least two heat exchange spiral sections 201, which are sequentially assembled from the inside to the outside. The innermost heat exchange spiral section 201 has a straight pipe 4 for gas replenishment inside, and a straight pipe 4 for gas replenishment is also provided between two adjacent heat exchange spiral sections 201.

[0071] Furthermore, a plurality of straight pipes 4 for gas replenishment are provided between two adjacent heat exchange spiral sections 201, and the plurality of straight pipes 4 are distributed circumferentially along the heat exchange spiral section 201.

[0072] Furthermore, the diameter of the straight pipe 4 located inside the innermost heat exchange spiral section 201 is larger than the diameter of the straight pipe 4 located between two adjacent heat exchange spiral sections 201, wherein the straight pipe 4 located inside the innermost heat exchange spiral section 201 has multiple air inlet holes 7 distributed circumferentially. This arrangement can make full use of the internal space of the innermost heat exchange spiral section 201.

[0073] In some embodiments provided by the invention, the orifice size of the gas replenishment hole 7 at the end of the gas replenishment unit near the absorbent medium inlet 101 is larger than the orifice size of the gas replenishment hole 7 at the end of the gas replenishment unit near the absorbent medium outlet 102. Since the time required for gas to travel from the gas replenishment hole 7 at the end of the gas replenishment unit near the absorbent medium outlet 102 to the absorbent medium outlet 102 is shorter, the contact time between the absorbent medium and the medium to be absorbed is shorter. In this embodiment, by reducing the orifice size of the gas replenishment hole 7 at the end of the gas replenishment unit near the absorbent medium outlet 102, the amount of gas discharged from the exhaust hole at the end of the gas replenishment unit near the absorbent medium outlet 102 can be reduced, thereby reducing the problem of gas not being absorbed by the absorbent medium.

[0074] In some embodiments of the invention, the number of air supply holes 7 at the end of the air supply unit near the absorbent medium inlet 101 is greater than the number of air supply holes 7 at the end of the air supply unit near the absorbent medium outlet 102. Because the time required for gas to travel from the air supply holes 7 at the end of the air supply unit near the absorbent medium outlet 102 to the absorbent medium outlet 102 is shorter after discharge, the contact time between the absorbent medium and the medium to be absorbed is shorter. In this embodiment, by reducing the number of air supply holes 7 at the end of the air supply unit near the absorbent medium outlet 102, the amount of gas discharged from the exhaust holes at that end of the air supply unit near the absorbent medium outlet 102 can be reduced, thus reducing the problem of gas not being absorbed by the absorbent medium.

[0075] In some embodiments provided by the present invention, the air supply hole 7 is a round hole, a star-shaped hole, or a polygonal hole. The air distribution hole 301 is a round hole, a star-shaped hole, or a polygonal hole.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A spiral absorber, characterized in that, include: The housing (1) is used to contain the absorption medium, and the housing (1) is provided with an absorption medium inlet (101) and an absorption medium outlet (102). The heat exchange tube (2) includes a heat exchange spiral section (201), which is spirally arranged inside the shell (1) along the axial direction of the shell (1). The heat exchange tube (2) is used to supply cooling medium for circulation. The gas distribution unit and the heat exchange spiral section (201) are arranged sequentially along the axial direction of the shell (1). The gas distribution unit is used to connect with the gas source that provides the medium to be absorbed. The gas distribution unit is provided with gas distribution holes (301). The gas replenishment unit is connected to the gas distribution unit and extends in the direction of the heat exchange spiral section (201) of the heat exchange tube (2). The gas replenishment unit is provided with multiple gas replenishment holes (7) along its own extension direction. Part of the medium to be absorbed in the gas distribution unit is discharged from the gas distribution hole (301) into the shell (1) to form bubbles and be absorbed by the absorption medium. The remaining medium to be absorbed enters the gas replenishment unit, runs along the gas replenishment unit, and is discharged from each gas replenishment hole (7) of the gas replenishment unit. The gas replenishment unit includes a gas replenishment pipe, one end of which is connected to the gas distribution unit, and the other end of which is closed and extends toward the heat exchange tube (2). The gas replenishment hole (7) is provided on the pipe wall of the gas replenishment pipe. The orifice size of the air replenishment hole (7) at the end of the air replenishment unit near the inlet (101) of the absorption medium is larger than the orifice size of the air replenishment hole (7) at the end of the air replenishment unit near the outlet (102) of the absorption medium.

2. The spiral absorber according to claim 1, characterized in that, The number of heat exchange tubes (2) is multiple, of which at least two heat exchange spiral segments (201) have the same diameter, and the heat exchange spiral segments (201) with the same diameter are arranged in parallel to each other.

3. The spiral absorber according to claim 1, characterized in that, The number of heat exchange tubes (2) is multiple, of which a portion of the heat exchange spiral segments (201) has a larger diameter than another portion of the heat exchange spiral segments (201), and the larger diameter heat exchange spiral segments (201) are fitted outside the smaller diameter heat exchange spiral segments (201).

4. The spiral absorber according to claim 1, characterized in that, The housing (1) has three independent chambers arranged sequentially along the axial direction of the housing (1). The gas distribution unit, the gas replenishment unit and the heat exchange spiral section (201) are all located in the middle chamber (106) of the three chambers (106). The absorption medium inlet (101) and the absorption medium outlet (102) are both connected to the middle chamber (106). The two ends of the heat exchange spiral section (201) are respectively connected to the two chambers (106) located at both ends of the three chambers (106). The shell (1) is provided with a cooling medium inlet (109) and a cooling medium outlet (108). The cooling medium inlet (109) and the cooling medium outlet (108) are respectively connected to the two chambers (106) located at both ends.

5. The spiral absorber according to claim 4, characterized in that, The housing (1) includes a cylindrical body (103), a pair of end caps (104) and a pair of sealing plates (105). The pair of end caps (104) are respectively sealed at both ends of the cylindrical body (103). The pair of sealing plates (105) are disposed inside the cylindrical body (103) and there is a gap between the pair of sealing plates (105). The pair of end caps (104) are respectively provided with the cooling medium inlet (109) and the cooling medium outlet (108). The pair of sealing plates (105) and the sealing plates (105) and the end caps (104) respectively form the corresponding chambers (106).

6. The spiral absorber according to any one of claims 1-5, characterized in that, The gas distribution unit includes a gas distribution plate (3), which is connected to the inner wall of the housing (1). The gas distribution hole (301) is provided on the gas distribution plate (3). The housing (1) is provided with an air inlet (107), which is located on the side of the gas distribution plate (3) away from the heat exchange spiral section (201) and is used to introduce the medium to be absorbed into the side of the gas distribution plate (3) away from the heat exchange spiral section (201).

7. The spiral absorber according to claim 1, characterized in that, At least a portion of the air supply pipe has a curved axis.

8. The spiral absorber according to claim 7, characterized in that, The air supply pipe includes a spirally arranged air supply spiral section (5); The gas supply spiral section (5) of the gas supply pipe and the heat exchange spiral section (201) of the heat exchange pipe (2) have the same diameter and are arranged parallel to each other. Alternatively, the diameter of the gas supply spiral section (5) of the gas supply pipe is greater than or less than the diameter of the heat exchange spiral section (201) of the heat exchange pipe (2). The gas supply spiral section (5) of the gas supply pipe is fitted on the outside or inside of the heat exchange spiral section (201) of the heat exchange pipe (2).

9. The spiral absorber according to claim 1, characterized in that, The number of the air supply pipes is multiple, and at least some of the air supply pipes are straight pipes (4).

10. The spiral absorber according to any one of claims 1-5, characterized in that, The number of air replenishing holes (7) on the end of the air replenishing unit near the inlet (101) of the absorption medium is greater than the number of air replenishing holes (7) on the end of the air replenishing unit near the outlet (102) of the absorption medium.

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