Adsorption column with finned tube and tail gas recovery system

Abstract

The utility model discloses an adsorption column with finned tubes and a polycrystalline silicon tail gas recovery system, and relates to the technical field of tail gas recovery. The finned tube comprises a finned tube main body, a heat-conducting winding belt is wound outside the finned tube main body, and a first heat-conducting fin is arranged on the outer surface of the winding belt. The adsorption column with the finned tube comprises an adsorption column body, a heat exchange half tube is spirally arranged outside the adsorption column body, a finned coil is spirally arranged in the adsorption column body, a finned tube body is vertically arranged in the adsorption column body and is distributed around the finned coil, and the adsorption column body is filled with an adsorbent and heat conduction gas. The adsorption column body is provided with a temperature and pressure detection mechanism for detecting the internal environment temperature and pressure, and is also provided with a circulating mechanism for uniformly mixing heat-conducting gas. The polycrystalline silicon tail gas recovery system comprises an adsorption column with a finned tube. According to the finned tube, the adsorption column with the finned tube and the polycrystalline silicon tail gas recovery system, the heat exchange efficiency is improved through the first fins and the second fins, and the tail gas treatment effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tail gas recovery, in particular to a finned tube, an adsorption column with the finned tube and a tail gas recovery system. Background Art

[0002] In the production of polysilicon, the trichlorosilane synthesis process and the reduction process will produce a large amount of tail gas. It is estimated that for every 1kg of polysilicon product produced, 40kg of tail gas will be produced, and its main components are: hydrogen (H2), hydrogen chloride (HCL), dichlorosilane (SiH2CL2), trichlorosilane (SiHCL3), silicon tetrachloride (SiCL4), etc. Polysilicon tail gas is not only an effective raw material gas or an intermediate product, but also a substance that is extremely harmful to the environment. If it is only discharged after treatment, a large amount of waste liquid and waste gas will be generated, and a huge waste of resources will be caused. How to effectively separate and recycle these components and turn waste into treasure is a problem that must be solved in the production of polysilicon.

[0003] In the tail gas recovery system of the polysilicon device, the adsorption column is an extremely critical equipment, which is used to absorb the residual HCL and chlorosilane in the hydrogen to obtain high-purity hydrogen. After the adsorption work, the adsorbent in the adsorption column needs to be regenerated to solve the cost problem, and the adsorbent regeneration requires heating. The existing adsorbent heating generally uses a heat exchange tube with a heat source to heat the adsorbent, but the heating efficiency relying solely on the heat conduction of the heat exchange tube is low, which affects the adsorbent regeneration.

[0004] Therefore, the prior art needs to be improved. Utility Model Content

[0005] The technical problem to be solved by the utility model is that the heating efficiency of heat conduction relying on heat exchange tubes in the prior art is low, which affects the regeneration of adsorbent. The utility model aims to provide a finned tube, an adsorption column with finned tubes and an exhaust gas recovery system, which adopt corresponding technical means and have the advantages of high heat exchange efficiency, good adsorption effect, reliability and durability.

[0006] The utility model is realized by the following technical solutions:

[0007] In a first aspect, the utility model provides a fin tube, comprising a fin tube body, the exterior of the fin tube body being wound with a heat-conductive tape, and the outer surface of the tape being provided with a heat-conductive first fin.

[0008] Furthermore, in the present invention, the above-mentioned winding tape is tightly wound around the outer surface of the fin tube body.

[0009] In the second aspect, the utility model also provides an adsorption column with finned tubes, which includes the above-mentioned finned tubes and an adsorption column body, the outer spiral of the adsorption column body is provided with a heat exchange half-tube, the inner spiral of the adsorption column body is provided with a fin coil, the fin tube body is vertically arranged inside the adsorption column body and distributed around the fin coil, the interior of the adsorption column body is filled with adsorbent and heat-conducting gas, the adsorption column body is provided with a temperature and pressure detection mechanism for detecting the internal ambient temperature and pressure, and the adsorption column body is also provided with a circulation mechanism for mixing the heat-conducting gas evenly.

[0010] Furthermore, in the present invention, the fin coil comprises a coil body, the coil body is provided with a hollow tube sleeve, and the outer surface of the hollow tube sleeve is provided with a second fin.

[0011] Furthermore, in the utility model, a tube support is provided in the adsorption column body, and the tube support is connected to the fin tube body.

[0012] Furthermore, in the utility model, the above-mentioned circulation mechanism includes a gas outlet pipe and a gas inlet pipe, the port of the gas inlet pipe is located at the lower part of the adsorption column body, the gas outlet pipe is connected to an inner tube whose port is located at the upper part of the adsorption column body, and the gas outlet pipe and the gas inlet pipe are both connected to an organic pump.

[0013] Furthermore, in the utility model, the top of the adsorption column body is provided with an adsorbent filling port and a product gas outlet, the bottom of the adsorption column body is provided with an adsorbent unloading port and a product gas inlet, and the bottom center of the adsorption column body is provided with a drain port.

[0014] Furthermore, in the present invention, the tube inlet of the heat exchange half tube is located at the lower side of the tube outlet of the heat exchange half tube.

[0015] Furthermore, in the present invention, the temperature and pressure detection mechanism includes a thermometer and a pressure gauge, and the thermometer and the pressure gauge are connected to the adsorption column body.

[0016] In a third aspect, the utility model also provides an exhaust gas recovery system, which includes the above-mentioned adsorption column with finned tubes.

[0017] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0018] The utility model provides a fin tube, which has three parts: a fin tube body, a winding belt and a first fin. The winding belt with a heat conduction function is wound on the fin tube body in turns, and then the first fin is fixed on the winding belt. The first fin has a larger area, which enhances the heat conduction capacity, promotes the regeneration of the adsorbent, and is beneficial to the exhaust gas treatment. In addition, since the first fin is not directly fixedly connected to the fin tube body, the welding stress concentration damage caused by the direct welding of the first fin and the fin tube body and the stress concentration damage caused by the temperature difference during operation are avoided, which significantly improves the service life of the fin tube.

[0019] The utility model also provides an adsorption column with finned tubes, wherein the vertical finned tubes and the spiral finned coils are installed inside the adsorption column body, and the heat exchange half-tube is installed outside the adsorption column body. The finned tubes, the finned coils and the heat exchange half-tubes provide heat sources from both inside and outside the adsorption column body, thereby improving the heat exchange efficiency of the adsorbent. In addition, the finned tubes are provided with first fins, and the finned coils are provided with second fins, which greatly increases the heat exchange area, thereby further improving the heat exchange efficiency, thereby reducing the time for adsorbent regeneration and improving the regeneration efficiency.

[0020] The utility model also provides a tail gas recovery system, which can be used for tail gas recovery in polysilicon production. Adopting an adsorption column with finned tubes as a tail gas treatment site, improving the heat transfer efficiency of the adsorption column, will improve the utilization rate of the adsorbent, help increase the tail gas treatment volume, and improve the purity of the hydrogen after treatment. The utility model is not only used for tail gas recovery systems, but also can be used for waste gas purification in the pharmaceutical industry, or for removing SO2, nitrogen oxides and chlorine in industrial waste gas, improving the heat transfer efficiency of the adsorption equipment, improving the utilization rate of the adsorbent, and increasing the waste gas treatment volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present utility model, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0022] Figure 1 This is a structural schematic diagram of an adsorption column with finned tubes of the utility model;

[0023] Figure 2 It is a schematic diagram of the structure of the fin tube of the utility model;

[0024] Figure 3 It is a schematic diagram of the structure of the fin coil of the utility model;

[0025] Figure 4 It is a schematic structural diagram of the hollow tube sleeve and the second fin of the utility model.

[0026] Markings and corresponding parts names in the attached drawings: 1-adsorbent discharge port, 2-thermometer, 3-heat exchange half tube, 4-fin tube body, 401-winding belt, 402-first fin, 5-tube outlet, 6-lifting ear, 7-adsorbent filling port, 8-product gas outlet, 9-tube support, 10-pressure gauge, 11-inner tube, 12-fin coil, 1201-hollow tube sleeve, 1202-second fin, 13-adsorption column body, 14-tube inlet, 15-gas outlet pipe, 16-gas inlet pipe, 17-product gas inlet, 18-coil fixing part, 19-drain port, 20-support skirt. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with embodiments and drawings. The schematic implementation manner of the utility model and its description are only used to explain the utility model and are not intended to limit the utility model.

[0028] The following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. 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.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0030] In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance. In the description of the embodiments of the present utility model, "multiple" means at least 2.

[0031] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0032] Example 1

[0033] Please refer to Figure 2 As shown, a fin tube provided by Example 1 of the utility model is mainly composed of three parts: a fin tube body 4, a winding band 401 and a first fin 402. The fin tube body 4 is a round tube made of stainless steel or carbon steel, and is used to transport fluid with a cold source or a heat source.

[0034] Furthermore, the winding tape 401 is a strip of carbon steel or stainless steel, and the winding tape 401 is wound around the outside of the fin tube body 4, and two adjacent circles or turns of the winding tape 401 are close to each other (or may not be abutted in other embodiments), so that the winding tape 401 covers the entire outer surface of the fin tube body 4. The first fin 402 is a rectangular sheet, and the extension direction of the first fin 402 is parallel to the extension direction of the fin tube body 4. The first fin 402 and the winding tape 401 are fixedly connected, and the fixed connection method can be selected by welding.

[0035] It should be noted that in this embodiment, one fin tube body 4 is equipped with six first fins 402 (four, five, seven or more fins may be installed in other embodiments), and the six first fins 402 are evenly distributed around the fin tube body 4, which has a good heat dissipation effect.

[0036] The working principle of the fin tube in this embodiment is as follows:

[0037] The first fin 402 has a large area, which enhances the ability of heat conduction and heat dissipation, promotes the regeneration of the adsorbent, and is beneficial to the exhaust gas treatment. In addition, since the first fin 402 is not directly fixedly connected to the fin tube body 4, the welding stress concentration damage caused by the direct welding of the first fin 402 and the fin tube body 4 and the stress concentration damage caused by the temperature difference during operation are avoided, which significantly improves the service life of the fin tube. Even if the connection between the first fin 402 and the winding belt 401 is broken or cracked, it will not affect the fin tube body 4, and avoid causing the fin tube body 4 to leak. The winding belt 401 is not welded to the fin tube body 4, avoiding damage to the fin tube body 4 during manufacturing. Since the welding stress and temperature difference stress are eliminated, the wall thickness of the fin tube body 4 can be reduced, the material procurement cost of the fin tube body 4 can be reduced, and the manufacturing cost of the adsorption column can be greatly reduced. The manufacturing difficulty of welding the first fin 402 and the winding belt 401 is much lower than that of directly welding the fin to the surface of the heat exchange tube, which reduces the manufacturing cost of the fin tube, and thus greatly reduces the manufacturing cost of the adsorption column.

[0038] Example 2

[0039] This embodiment provides an adsorption column with finned tubes, which uses the finned tubes in Example 1. The adsorption column with finned tubes is the main place for exhaust gas purification. Figure 1As shown, it is mainly composed of five parts: an adsorption column body 13, a heat exchange half tube 3, a fin coil 12, a temperature and pressure detection mechanism and a circulation mechanism.

[0040] Further, combined with Figure 1 As shown, the adsorption column body 13 is in the shape of a tower tank, and the adsorption column body 13 is placed vertically. A support skirt 20 is installed at the bottom of the adsorption column body 13 and is lifted off the ground. The adsorption column body 13 is filled with an adsorbent (such as activated carbon, molecular sieve, activated alumina, silica gel, etc.) and a heat-conducting gas (exhaust gas). Figure 1 and Figure 3 As shown, the finned coil 12 is installed in the adsorption column body 13 in a spiral form, the upper end of the finned coil 12 extends from the top of the adsorption column body 13, and the lower end of the finned coil 12 extends from the bottom of the adsorption column body 13. The fluid with the heat source is transported through the finned coil 12, and the heat is released in the adsorption column body 13. The heat is transferred to the heat-conducting gas, and then transferred to the adsorbent through the heat-conducting gas, which promotes the regeneration of the adsorbent.

[0041] It should be noted that, combined with Figure 3 and Figure 4 As shown, the finned coil 12 is mainly composed of three parts: a coil body, a hollow tube sleeve 1201 and a second fin 1202, all of which are preferably made of metal materials with good thermal conductivity. The hollow tube sleeve 1201 is a sleeve form adapted to the outer diameter and bending degree of the coil body, and the second fin 1202 is a circular fin fixedly welded on the hollow tube sleeve 1201. A hollow tube sleeve 1201 has a second fin 1202, and then multiple hollow tube sleeves 1201 are sequentially sleeved on the coil body to form a finned coil 12. Relying on the hollow tube sleeve 1201 and the second fin 1202, the coil body in the prior art can be directly modified, reducing the application cost and improving the heat dissipation effect.

[0042] In some implementations of this embodiment, Figure 1 As shown, there are four or more fin tubes, which are evenly distributed around the fin coil 12, and the fin tubes are vertically installed inside the adsorption column body 13. The bottom end of the fin tube body 4 passes through the bottom of the adsorption column body 13. The fin tubes transport fluid with a heat source, release heat in the adsorption column body 13, and the heat is transferred to the heat-conducting gas and the adsorbent, and is transferred to the adsorbent through the heat-conducting gas, promoting the regeneration of the adsorbent.

[0043] It should be noted that if Figure 1Four layers of horizontal tube supports 9 are installed inside the adsorption column body 13. The four layers of tube supports 9 are arranged in sequence from top to bottom in the adsorption column body 13. The tube supports 9 are plates. The tube supports 9 are connected to the fin tube body 4 so that the fin tube body 4 can remain in a vertical state. In addition, four vertical coil fixings 18 are installed in the adsorption column body 13. The coil fixings 18 are connected to the fin coil 12. The coil fixings 18 are made of angle steel or channel steel, which are used to fix the fin coil 12 and support the weight.

[0044] In some implementations of this embodiment, Figure 1 As shown, the circulation mechanism includes a gas outlet pipe 15 and a gas inlet pipe 16. The gas outlet pipe 15 is installed at the lower right corner of the adsorption column body 13, and the gas inlet pipe 16 is installed at the lower right corner of the adsorption column body 13. One end of the gas outlet pipe 15 extending into the adsorption column body 13 is connected to the inner tube 11, and the inner tube 11 extends vertically upward. The port of the inner tube 11 is located at the top of the adsorption column body 13. Since the gas outlet pipe 15 and the gas inlet pipe 16 are both connected to an organic pump, the organic pump draws the heat-conducting gas in the adsorption column body 13 from the gas outlet pipe 15 and then sends it in from the gas inlet pipe 16, so as to promote the circulation of the heat-conducting gas in the adsorption column body 13, so that the heat-conducting gases with different temperature differences are evenly mixed, which is conducive to heating the adsorbent.

[0045] Furthermore, the temperature and pressure detection mechanism includes a thermometer 2 and a pressure gauge 10, which are used to detect the temperature and pressure in the adsorption column body 13. The thermometer 2 is fixedly mounted on the left outer wall of the adsorption column body 13, and the temperature monitoring probe is deeply inserted into the adsorption column body 13. The pressure gauge 10 is mounted on the right outer wall of the adsorption column body 13, and the probe of the pressure gauge 10 is deeply inserted into the adsorption column body 13. Through the thermometer 2 and the pressure gauge 10, the reaction temperature and pressure in the adsorption column body 13 can be known, which is convenient for control.

[0046] In some implementations of this embodiment, the heat exchange half tube 3 is spirally arranged around the outer wall of the adsorption column body 13, and the heat exchange half tube 3 has a tube inlet 14 and a tube outlet 5. The tube inlet 14 is located below the tube outlet 5. A fluid with a heat source or a cold source is introduced from the tube inlet 14, and the fluid heats the internal environment of the adsorption column body 13.

[0047] In some implementations of the present embodiment, the top of the adsorption column body 13 is provided with an adsorbent filling port 7 and a product gas outlet 8, and the adsorbent is added through the adsorbent filling port 7, and the purified hydrogen is collected through the product gas outlet 8. The bottom of the adsorption column body 13 is provided with an adsorbent discharge port 1 and a product gas inlet 17, and the adsorbent discharge port 1 is used to pour out the adsorbent after use, which is convenient for replacement, and the product gas inlet 17 is connected to the tail gas delivery pipeline, and the tail gas to be purified can be sent into the interior of the adsorption column body 13. The bottom of the adsorption column body 13 is a concave arc surface, and a drain port 19 is provided at the center of the bottom. The drain port 19 is located at the lowest point of the concave arc surface, which is convenient for discharging all the residual adsorbent and other impurities. The drain port 19, the product gas inlet 17, the product gas outlet 8, etc. are all equipped with valves.

[0048] Furthermore, a lifting ear 6 is installed on each of the left and right sides of the adsorption column body 13 , and the adsorption column body 13 can be easily moved through the lifting ear 6 .

[0049] The working principle of the adsorption column with finned tubes in this embodiment is as follows:

[0050] The tail gas to be purified is sent into the interior of the adsorption column body 13 through the product gas inlet 17, and the fluid is sent into the interior of the heat exchange half tube 3, the fin tube and the fin coil 12. The fluid is transported from bottom to top in the heat exchange half tube 3, the fin tube and the fin coil 12. The fluid exchanges heat with the heat-conducting gas and the adsorbent through the wall surface of the adsorption column body 13, the first fin 402 and the second fin 1202, thereby heating the adsorbent. After adsorption, the hydrogen is recovered through the product gas outlet 8, and when the adsorbent is regenerated, it needs to be heated first and then cooled. The temperature of the heated adsorbent must reach the regeneration temperature, and the temperature of the cooled adsorbent is at or below normal temperature. During regeneration, the harmful gas discharged by the adsorbent is recovered by backblowing. During adsorption, the tail gas enters the adsorption column body 13, the harmful substances are adsorbed by the adsorbent, the hydrogen rises, and is recovered and discharged through the product gas outlet 8, and the hydrogen is collected for the production of polysilicon. The modular hollow tube sleeve 1201 and the second fin 1202 are closely arranged on the outer surface of the coil body, and the heat exchange performance of the finned coil 12 is much higher than that of the bare tube coil. The finned tube and the finned coil 12 are used in combination, and the comprehensive heat exchange performance is better. The gas in the adsorption column body 13 circulates in and out through the gas outlet pipe 15 and the gas inlet pipe 16, and the internal gas circulates when the adsorption column body 13 is heated and cooled, so that the temperature in the adsorption column body 13 is more uniform, and the work efficiency is improved.

[0051] Example 3

[0052] This embodiment provides a polysilicon tail gas recovery system, which uses the adsorption column with finned tubes in Example 2, and also includes a hydrogen storage tank, which is connected to a delivery pipeline, which is further connected to the product gas outlet 8. The tail gas delivery pipe is connected to the product gas inlet 17.

[0053] The working principle of the polysilicon tail gas recovery system of this embodiment is as follows:

[0054] Adsorption columns with finned tubes are used as tail gas treatment sites to improve the heat transfer efficiency of the adsorption columns, which will increase the utilization rate of the adsorbent, help increase the tail gas treatment volume, and improve the purity of the hydrogen after treatment. The utility model is not only used in tail gas recovery systems, but also can be used for waste gas purification in the pharmaceutical industry, or for removing SO2, nitrogen oxides and chlorine from industrial waste gas, improving the heat transfer efficiency of the adsorption equipment, improving the utilization rate of the adsorbent, and increasing the waste gas treatment volume.

[0055] In summary, the utility model provides a fin tube, which includes a fin tube body 4, the outside of the fin tube body 4 is wound with a heat-conducting tape 401, and the outer surface of the tape 401 is provided with a heat-conducting first fin 402. The above two adjacent turns of the tape 401 abut against each other. The utility model also provides an adsorption column with fin tubes, which includes the above-mentioned fin tube, and also includes an adsorption column body 13, the outer spiral of the adsorption column body 13 is provided with a heat exchange half tube 3, the inner spiral of the adsorption column body 13 is provided with a fin coil 12, the fin tube body 4 is vertically arranged inside the adsorption column body 13 and distributed around the fin coil 12, the interior of the adsorption column body 13 is filled with adsorbent and heat-conducting gas, the adsorption column body 13 is provided with a temperature and pressure detection mechanism for detecting the internal ambient temperature and pressure, and the adsorption column body 13 is also provided with a circulation mechanism for mixing the heat-conducting gas evenly. The finned coil 12 includes a coil body, the coil body is provided with a hollow tube sleeve 1201, and the outer surface of the hollow tube sleeve 1201 is provided with a second fin 1202. A tube support 9 is provided in the adsorption column body 13, and the tube support 9 is connected to the finned tube body 4. Four vertical coil fixings 18 are installed in the adsorption column body 13, and the coil fixings 18 are connected to the finned coil 12. The circulation mechanism includes a gas outlet pipe 15 and a gas inlet pipe 16, the port of the gas inlet pipe 16 is located at the lower part of the adsorption column body 13, the gas outlet pipe 15 is connected to the inner pipe 11 whose port is located at the upper part of the adsorption column body 13, and the gas outlet pipe 15 and the gas inlet pipe 16 are both connected to an organic pump. The top of the adsorption column body 13 is provided with an adsorbent filling port 7 and a product gas outlet 8, the bottom of the adsorption column body 13 is provided with an adsorbent discharge port 1 and a product gas inlet 17, and the bottom center of the adsorption column body 13 is provided with a drain port 19. The tube inlet 14 is located at the lower side of the tube outlet 5. The temperature and pressure detection mechanism includes a thermometer 2 and a pressure gauge 10, and the thermometer 2 and the pressure gauge 10 are connected to the adsorption column body 13. The utility model also provides an exhaust gas recovery system, which includes the above-mentioned adsorption column with finned tubes.

[0056] Therefore, the finned tube, adsorption column with finned tube and polysilicon tail gas recovery system provided by the embodiments of the utility model have the advantages of high heat exchange efficiency and good adsorption effect.

[0057] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only the specific implementation method of the utility model and is not used to limit the protection scope of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. An adsorption column with finned tubes, characterized in that: The invention comprises a fin tube, wherein the fin tube comprises a fin tube body (4), the outside of the fin tube body (4) is wound with a heat-conducting tape (401), the outer surface of the tape (401) is provided with a heat-conducting first fin (402), and the tape (401) is tightly wound around the outer surface of the fin tube body (4), and further comprises an adsorption column body (13), the outer spiral of the adsorption column body (13) is provided with a heat exchange half tube (3), the inner spiral of the adsorption column body (13) is provided with a fin coil (12), the fin tube body (4) is vertically arranged inside the adsorption column body (13) and distributed around the fin coil (12), the interior of the adsorption column body (13) is filled with an adsorbent and a heat-conducting gas, the adsorption column body (13) is provided with a temperature and pressure detection mechanism for detecting the internal environment temperature and pressure, and the adsorption column body (13) is also provided with a circulation mechanism for mixing the heat-conducting gas evenly.

2. The adsorption column with finned tubes according to claim 1, characterized in that: The finned coil (12) comprises a coil body, the coil body is provided with a hollow tube sleeve (1201), and the outer surface of the hollow tube sleeve (1201) is provided with a second fin (1202).

3. The adsorption column with finned tubes according to claim 2, characterized in that: A tube support (9) is provided in the adsorption column body (13), and the tube support (9) is connected to the fin tube body (4).

4. The adsorption column with finned tubes according to claim 1, characterized in that: The circulation mechanism comprises a gas outlet pipe (15) and a gas inlet pipe (16), the port of the gas inlet pipe (16) being located at the lower part of the adsorption column body (13), the gas outlet pipe (15) being connected to an inner pipe (11) having a port located at the upper part of the adsorption column body (13), and the gas outlet pipe (15) and the gas inlet pipe (16) being both connected to an organic pump.

5. The adsorption column with finned tubes according to claim 1, characterized in that: The top of the adsorption column body (13) is provided with an adsorbent filling port (7) and a product gas outlet (8), the bottom of the adsorption column body (13) is provided with an adsorbent discharge port (1) and a product gas inlet (17), and the bottom center of the adsorption column body (13) is provided with a drain port (18).

6. The adsorption column with finned tubes according to claim 1, characterized in that: The tube inlet (14) of the heat exchange half tube (3) is located at the lower side of the tube outlet (5) of the heat exchange half tube (3).

7. The adsorption column with finned tubes according to claim 1, characterized in that: The temperature and pressure detection mechanism comprises a thermometer (2) and a pressure gauge (10), and the thermometer (2) and the pressure gauge (10) are connected to the adsorption column body (13).

8. A tail gas recovery system, characterized in that: The invention comprises an adsorption column with finned tubes as described in any one of claims 1 to 7.

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