Thermal desorption type adsorption tank

Abstract

The utility model relates to a thermal desorption type adsorption tank, which is provided with a support and a tank body, a heat exchange device is arranged in the tank body, the heat exchange device comprises an upper end plate, a lower end plate and two heat exchange mechanisms, the upper end plate and the lower end plate are in one-to-one correspondence with carbon discharge pipes, a plurality of carbon inlet holes are arranged on the upper end plate and the lower end plate, two heat exchange areas are arranged in the tank body, and the two heat exchange areas are communicated with the carbon discharge pipes. The heat exchange mechanism comprises first heat exchange pipelines, second heat exchange pipelines and connecting heat exchange pipelines, each first heat exchange pipeline, each second heat exchange pipeline and each connecting heat exchange pipeline comprise a plurality of heat exchange pipes arranged in parallel, upper bent pipes and lower bent pipes, each upper bent pipe is erected above the corresponding charcoal inlet hole in the upper end plate, and each lower bent pipe is erected above the corresponding charcoal inlet hole in the lower end plate. And the lower bent pipes are erected below the corresponding carbon inlet holes in the lower end plate, the first heat exchange pipelines on the heat exchange mechanisms are adjacently arranged, and every two adjacent first heat exchange pipelines are arranged between the oppositely-arranged second heat exchange pipelines. The device is ingenious in structure, convenient and practical.

Description

Technical Field

[0001] This utility model relates to the field of adsorption tanks, and in particular to a thermal desorption adsorption tank. Background Technology

[0002] An adsorption tank is a device that uses adsorbent materials to remove impurities from fluids. Its basic principle is that the adsorbent material has a high effective surface area, enabling it to adsorb target substances in the fluid, thereby improving the fluid's purity. An adsorption tank typically consists of a cylindrical tank with an adsorbent lining its inner wall, inlet and outlet pipes, an outlet pipe, and a washing pipe. When pollutants flow into the adsorption tank through the inlet, they are adsorbed onto the surface of the adsorbent inside the tank, thus being effectively removed. After a period of time, the adsorbent surface becomes saturated and needs to be regenerated or replaced.

[0003] The adsorption tanks in oil and gas recovery units are filled with adsorbents such as activated carbon and resin. At least two tanks are typically configured, alternating between adsorption and desorption / regeneration to ensure continuous operation of the adsorption process. Online desorption technology currently generally employs ambient temperature vacuum desorption, using a high-vacuum screw pump to evacuate the adsorption tank. The oil and gas adsorbed in the adsorbent are vaporized and desorbed under negative pressure, thus achieving regeneration. However, when dealing with certain gases that are easily adsorbed but difficult to desorb, such as benzene and alcohols, ambient temperature vacuum desorption can result in incomplete desorption. The concentration of residual oil and gas in the adsorbent increases, eventually leading to adsorption saturation and breakthrough. This causes the exhaust gas concentration at the unit outlet to exceed standards, harming the atmospheric environment and causing significant inconvenience. Summary of the Invention

[0004] The purpose of this invention is to provide a thermal desorption adsorption tank with an ingenious structure. Through thermal desorption, it greatly improves the service life of the adsorbent, ensuring that air pollution emissions meet standards while reducing the amount of hazardous waste generated from replacing the adsorbent. It is convenient and practical.

[0005] The technical scheme for realizing the purpose of the present application is: the desorption pyrolysis type adsorption tank has a support and a tank body fixed on the support; a gas inlet pipe in communication with the tank body is fixed at the bottom of the tank body, a gas outlet pipe and at least one carbon loading pipe in communication with the tank body are arranged at the top of the tank body, a water inlet pipe and a water return pipe are arranged at the left side of the tank body, the water inlet pipe is arranged above the water return pipe, two carbon unloading pipes in communication with the tank body are arranged at the right side of the tank body, a heat exchange device is arranged in the tank body, the heat exchange device comprises an upper end plate fixed in the tank body, a lower end plate arranged below the upper end plate and parallel to the upper end plate, and two heat exchange mechanisms arranged on the upper end plate and the lower end plate in opposition, the upper end plate and the lower end plate correspond to the carbon unloading pipes one by one, and a plurality of carbon inlet holes are arranged on the upper end plate and the lower end plate, two heat exchange zones are arranged in the tank body, the two heat exchange zones are arranged in opposition along the central axis of the tank body, and each heat exchange mechanism is arranged in a corresponding heat exchange zone, the heat exchange mechanism comprises a first heat exchange pipe, a second heat exchange pipe and a connecting heat exchange pipe, one end of each first heat exchange pipe is in communication with the water inlet pipe, the other end of each first heat exchange pipe is in communication with the second heat exchange pipe, the other end of each second heat exchange pipe is in communication with the connecting heat exchange pipe, and the other end of each connecting heat exchange pipe is connected to the water return pipe, each first heat exchange pipe, each second heat exchange pipe and the connecting heat exchange pipe each comprise a plurality of parallel heat exchange pipes, an upper bend pipe arranged at the upper end of each heat exchange pipe and a lower bend pipe arranged at the lower end of each heat exchange pipe, the upper end of each heat exchange pipe is connected to the upper end of an adjacent heat exchange pipe on one side through the upper bend pipe, the lower end of each heat exchange pipe is connected to the lower end of an adjacent heat exchange pipe on the other side through the lower bend pipe, each upper bend pipe is arranged above a corresponding carbon inlet hole on the upper end plate, and the projection of the upper bend pipe on the upper end plate partially overlaps the carbon inlet hole, each lower bend pipe is arranged below a corresponding carbon inlet hole on the lower end plate, and the projection of the lower bend pipe on the lower end plate partially overlaps the carbon inlet hole, and the first heat exchange pipes on each heat exchange mechanism are arranged in opposition, and two adjacent first heat exchange pipes are arranged between the oppositely arranged second heat exchange pipes.

[0006] Further, the first heat exchange pipeline comprises a plurality of first heat exchange units arranged in parallel, and a plurality of bypass bends for connecting the first heat exchange units, each first heat exchange unit comprises a plurality of heat exchange pipes arranged in parallel, a first upper bend arranged at the upper end of the heat exchange pipes, and a first lower bend arranged at the lower end of the heat exchange pipes, the projections of each first upper bend and each first lower bend on the upper end plate or the lower end plate are arranged in a straight line, the projection of each bypass bend and the adjacent first upper bend or first lower bend on the upper end plate is arranged in a non-parallel manner, the second heat exchange pipeline comprises a plurality of heat exchange pipes, a second upper bend arranged at the upper end of the heat exchange pipes, and a second lower bend arranged at the lower end of the heat exchange pipes, the density of each heat exchange pipe in the second heat exchange pipeline is greater than the density of each heat exchange pipe in any first heat exchange pipe, each first upper bend and each second upper bend are arranged above the corresponding carbon inlet hole on the upper end plate, the projection of each first upper bend and second upper bend on the upper end plate partially overlaps the carbon inlet hole, each first lower bend and second lower bend are arranged below the corresponding carbon inlet hole on the lower end plate, and the projection of each first lower bend and second lower bend on the lower end plate partially overlaps the carbon inlet hole.

[0007] Further, the water inlet pipe and the water outlet pipe are each provided with a collecting pipe, each first heat exchange pipeline is connected to the collecting pipe on the water inlet pipe, and each connecting heat exchange pipeline is connected to the collecting pipe on the water outlet pipe.

[0008] Further, the projections of the centers of any three adjacent carbon inlet holes on the upper end plate or the lower end plate form an equilateral triangle.

[0009] Further, the outer wall of each heat exchange pipe is provided with a fin plate.

[0010] Further, a filter assembly is arranged between the lower end plate and the air inlet pipe, the filter assembly comprises a supporting angle iron fixed in the tank body, a lower pressing ring fixed on the supporting angle iron, a first wire mesh arranged on the lower pressing ring, a second wire mesh arranged on the first wire mesh, and an upper pressing ring arranged on the second wire mesh, the upper pressing ring and the lower pressing ring are fixedly connected by a locking piece, and the first wire mesh and the second wire mesh are fixed between the upper pressing ring and the lower pressing ring.

[0011] Further, the mesh count of the first wire mesh and the second wire mesh is 40 mesh.

[0012] Further, a cover is mounted on each carbon discharging pipe on the tank body, and a handle is arranged on each cover.

[0013] Further, a plurality of temperature control probe interfaces are arranged between the water inlet pipe and the water outlet pipe.

[0014] The utility model discloses a positive effect has: (1) the utility model discloses through setting up the air inlet pipe and the air outlet pipe on the jar body to connect with the vacuum pump of outside, and through each carbon filling pipe fills active carbon and resin and so on adsorbent, after the whole thermal desorption is completed, from the carbon hole, active carbon and resin and so on adsorbent are taken out, in the process of desorption, through the air inlet pipe and the air outlet pipe and vacuum pump connection, vacuum desorption is carried out then, and hot water or hot steam is passed into in the heat exchange mechanism, and hot water or hot steam is the heat source, and the adsorbent is carried out fast lifting through the heat exchanger, under the action of vacuum and high temperature, the oil gas of adsorbent remaining accelerates gasification, and is sucked out by vacuum pump, then again melts into cooling water, and the adsorbent is fast to normal temperature to be ready for use, through the heat exchange mechanism is set up into first heat exchange pipe, second heat exchange pipe and connecting heat exchange pipe, each first upper elbow pipe and second upper elbow pipe are crossed with each carbon hole, each first lower elbow pipe and second lower elbow pipe are crossed with each carbon hole, on one hand, the filling of adsorbent is convenient, on the other hand, through first heat exchange pipe, second heat exchange pipe and connecting heat exchange pipe and the connection of upper end plate and lower end plate, the efficiency of adsorbent lifting or cooling on upper end plate and lower end plate is greatly improved, the evaporation of adsorbent remaining oil gas and the rapid cooling of adsorbent after oil gas thermal desorption are accelerated, and the structure is ingenious, efficient and convenient.

[0015] (2) the utility model discloses through setting up first heat exchange pipe into first heat exchange part and the cooperation of detour pipe, and the density of each heat exchange pipe in second heat exchange pipe is greater than the density of each heat exchange pipe of first heat exchange part, can be convenient for adsorbent from the overall and efficient heat exchange of tank wall in the middle of jar body, further guaranteeing the overall and efficient thermal desorption of adsorbent remaining oil gas on upper end plate and lower end plate, thereby improving the service life of adsorbent, while guaranteeing that atmospheric pollutant emission meets the standard, reduce the waste quantity of user due to regular replacement of adsorbent, save the cost of user, and also have environmental protection benefit.

[0016] (3) the utility model discloses through setting up the collecting pipe on the water inlet pipe and the water outlet pipe, the hot water or hot steam of first heat exchange pipe, second heat exchange pipe and connecting heat exchange pipe in each heat exchange area is passed into as heat source or cooling water is passed into as cold source through the collecting pipe unification, can also guarantee that each heat source and cold source are discharged simultaneously, thereby improving the synchronism in each heat exchange area, convenient and practical.

[0017] (4) the utility model discloses through setting up the fin plate on the heat exchange pipe, further improve the efficiency and quality of heat exchange of heat exchange pipe, efficient and convenient.

[0018] (5) The utility model discloses a filter assembly is set up between the lower end plate and the air inlet pipe, and the first wire mesh and the second wire mesh are fixed through the upper pressing ring and the lower pressing ring, so that the oil gas is guaranteed to be filtered initially when entering or when being vacuumized, and the oil gas or other gas is filtered initially, which is practical and convenient.

[0019] (6) The utility model discloses the mesh number of the first wire mesh and the second wire mesh is set up to 40 meshes, can guarantee the filtering efficiency and the filtering quality of the oil gas or other gas on one hand, and can avoid the adsorbent from falling out of the adsorption tank on the other hand, which is convenient and practical.

[0020] (7) The utility model discloses a cover is set up on each carbon discharging pipe, and the adsorbent on the upper end plate and the lower end plate can be taken out and replaced through the cover that can open each carbon discharging pipe, which is efficient and convenient.

[0021] (8) The utility model discloses a temperature control probe interface is set up between the water inlet pipe and the backwater pipe, and the temperature in the tank body can be monitored in real time after the temperature control probe is installed on the temperature control probe interface, which is safe and practical. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to make the content of the utility model more easily be clearly understood, the following according to specific embodiment and combining with the drawings, the utility model is further detailed, wherein

[0023] Figure 1 It is the overall structure schematic diagram of pyrolysis adsorption tank in the utility model;

[0024] Figure 2 It is the overhead view of the overall structure of pyrolysis adsorption tank in the utility model;

[0025] Figure 3 It is Figure 2 the section view of A in the utility model;

[0026] Figure 4 It is the overall structure schematic diagram of heat exchange device in the utility model;

[0027] Figure 5 It is the overhead view of the connecting structure of each heat exchange mechanism and the upper end plate in the utility model;

[0028] Figure 6 It is the overhead view of the overall structure in the heat exchange zone in the utility model;

[0029] Figure 7 It is the overhead view of the overall structure of the first heat exchange pipeline in the utility model;

[0030] Figure 8 It is the overhead view of the overall structure of the second heat exchange pipeline in the utility model;

[0031] Figure 9 The projection connection line diagram of three adjacent carbon inlet holes in the utility model. DETAILED DESCRIPTION

[0032] See Figures 1 to 9 The utility model discloses a support 1 and the tank body 2 fixed on the support 1, the bottom of the tank body 2 is fixed with the air inlet pipe 21 that communicates with the tank body 2, and the top of the tank body is equipped with the air outlet pipe 22 that communicates with the tank body 2 and two carbon loading pipes 23, the left side of the tank body 2 is equipped with the water inlet pipe 24 and the backwater pipe 25, the water inlet pipe 24 is arranged in the upper of the backwater pipe 25, the right side of the tank body 2 is equipped with two unloading carbon pipe 27 that communicate with the tank body 2, the heat exchange device is equipped in the tank body 2, the heat exchange device includes the upper end plate 4 fixed in the tank body 2, the lower end plate 5 that is arranged below the upper end plate 4 and is arranged with the upper end plate 4 parallel, and two heat exchange mechanisms that are oppositely arranged on the upper end plate 4 and the lower end plate 5, the upper end plate 4 and the lower end plate 5 correspond to each unloading carbon pipe 27, and a plurality of carbon inlet holes 10 are equipped on the upper end plate 4 and the lower end plate 5, two heat exchange zones are equipped in the tank body 2, and the two heat exchange zones are symmetrically arranged along the central axis of the tank body 2, each heat exchange mechanism is arranged in the corresponding heat exchange zone, the heat exchange mechanism includes the first heat exchange pipe 7, the second heat exchange pipe 8 and the connecting heat exchange pipe 9, one end of each first heat exchange pipe 7 communicates with the water inlet pipe 24, the other end of each first heat exchange pipe 7 communicates with the second heat exchange pipe 8, the other end of each second heat exchange pipe 8 communicates with the connecting heat exchange pipe 9, and the other end of each connecting heat exchange pipe 9 is connected to the backwater pipe 25, each first heat exchange pipe 7, each second heat exchange pipe 8 and the connecting heat exchange pipe 9 all include a plurality of parallel heat exchange pipes 6, the upper bend pipe 62 arranged on the upper end of each heat exchange pipe 6 and the lower bend pipe 63 arranged on the lower end of each heat exchange pipe 6, the upper end of each heat exchange pipe 6 is connected to the upper end of the adjacent heat exchange pipe 6 on one side through the upper bend pipe 62, the lower end of each heat exchange pipe 6 is connected to the lower end of the adjacent heat exchange pipe 6 on the other side through the lower bend pipe 63, each upper bend pipe 62 is erected above the corresponding carbon inlet hole 10 on the upper end plate 4, and the projection of the upper bend pipe 62 on the upper end plate 4 partially overlaps the carbon inlet hole 10, each lower bend pipe 63 is erected below the corresponding carbon inlet hole 10 on the lower end plate 5, and the projection of the lower bend pipe 63 on the lower end plate 5 partially overlaps the carbon inlet hole 10, the first heat exchange pipe 7 on each heat exchange mechanism is arranged adjacent, and the adjacent two first heat exchange pipes 7 are arranged between the oppositely arranged second heat exchange pipes 8.

[0033] The first heat exchange pipeline 7 comprises a plurality of first heat exchange sections arranged in parallel, and a plurality of bypass bends for connecting the first heat exchange sections. Each first heat exchange section comprises a plurality of heat exchange pipes 6, a first upper bend 621 arranged at the upper end of the heat exchange pipes 6, and a first lower bend 631 arranged at the lower end of the heat exchange pipes 6. The projections of each first upper bend 621 and each first lower bend 631 on the upper end plate 4 or the lower end plate 5 are arranged in a straight line. The projection of each bypass bend on the upper end plate 4 is arranged non-parallel to the adjacent first upper bend 621 or first lower bend 631. The second heat exchange pipeline 8 comprises a plurality of heat exchange pipes 6, a second upper bend 622 arranged at the upper end of the heat exchange pipes 6, and a second lower bend 632 arranged at the lower end of the heat exchange pipes 6. The density of each heat exchange pipe 6 in the second heat exchange pipeline 8 is greater than the density of each heat exchange pipe 6 in any first heat exchange pipe 6. Each first upper bend 621 and each second upper bend 622 is arranged above the corresponding carbon inlet hole 10 on the upper end plate 4. The projection of each first upper bend 621 and second upper bend 622 on the upper end plate 4 partially overlaps the carbon inlet hole 10. Each first lower bend 631 and second lower bend 632 is arranged below the corresponding carbon inlet hole 10 on the lower end plate 5. The projection of each first lower bend 631 and second lower bend 632 on the lower end plate 5 partially overlaps the carbon inlet hole 10.

[0034] The water inlet pipe 24 and the water outlet pipe are each provided with a collecting pipe 29. Each first heat exchange pipeline 7 is connected to the collecting pipe 29 on the water inlet pipe 24. Each connecting heat exchange pipeline 9 is connected to the collecting pipe 29 on the water outlet pipe.

[0035] The projections of the centers of any three adjacent carbon inlet holes 10 on the upper end plate 4 or the lower end plate 5 form an equilateral triangle.

[0036] Each heat exchange pipe 6 is provided with a fin plate 61 on the outer wall.

[0037] A filter assembly 3 is arranged between the lower end plate 5 and the air inlet pipe 21. The filter assembly 3 comprises a support angle iron 31 fixed in the tank body 2, a lower pressing ring 33 fixed on the support angle iron 31, a first wire mesh 34 arranged on the lower pressing ring 33, a second wire mesh 35 arranged on the first wire mesh 34, and an upper pressing ring 32 arranged on the second wire mesh 35. The upper pressing ring 32 and the lower pressing ring 33 are fixedly connected by a locking member, and the first wire mesh 34 and the second wire mesh 35 are fixed between the upper pressing ring 32 and the lower pressing ring 33.

[0038] The first wire mesh 34 and the second wire mesh 35 each have a mesh count of 40 meshes.

[0039] Each unloading pipe 27 on the tank body is provided with a cover 28. Each cover 28 is provided with a handle 281.

[0040] A plurality of temperature control probe interfaces 26 are arranged between the water inlet pipe 24 and the water return pipe 25.

[0041] The working principle of the utility model is: in the process of using, first, the temperature control probe is installed in the temperature control probe interface 26, the carbon pipe 23 is opened, the adsorbent such as activated carbon, resin is put into the upper end plate 4 and the lower end plate 5, after the oil gas adsorption is completed, the adsorbent in the upper end plate 4 and the lower end plate 5 is adsorbed, in the process of adsorption, the operator can first connect the vacuum pump with the air outlet pipe 22, so that the tank 2 is pumped to vacuum, then hot water or steam is used as heat source through the water inlet pipe 24, under the double action of vacuum desorption and high temperature desorption, the residual oil gas in the adsorbent is accelerated to gasify and is sucked out by the vacuum pump, so that the service life of the adsorbent is improved, the heat source is stopped and cooling water is input to cool the adsorbent quickly, in the process of heating or cooling, the synchronism of each heat exchange zone is ensured through the collecting pipe 29, the heat exchange mechanism is set as the first heat exchange pipe 7, the second heat exchange pipe 8 and the connecting heat exchange pipe 9, each first upper elbow pipe 621 and second upper elbow pipe 622 is arranged across each carbon inlet hole 10, each first lower elbow pipe 631 and second lower elbow pipe 632 is arranged across each carbon inlet hole 10, on the one hand, the filling of the adsorbent is facilitated, on the other hand, the connection of the first heat exchange pipe 7, the second heat exchange pipe 8 and the connecting heat exchange pipe 9 with the upper end plate 4 and the lower end plate 5 greatly improves the lifting or cooling efficiency of the adsorbent on the upper end plate 4 and the lower end plate 5, through the two ways of vacuum desorption and high temperature desorption, the adsorbent of various different media can be used, the oil gas residual rate is low, the service life of the adsorbent is greatly prolonged, the atmospheric pollutant emission is guaranteed to reach the standard, the waste quantity generated by the user due to regular replacement of the adsorbent is reduced, the user cost is saved, the environmental protection benefit is obtained, after the heat desorption is completed, the adsorbent on the upper end plate 4 and the lower end plate 5 is taken out from the carbon discharge pipe 27 through the opening of the cover 28, and the adsorbent can be recycled, the structure is ingenious, convenient and practical.

[0042] The above embodiment is used to further explain the purpose, technical scheme and beneficial effects of the utility model, and it should be understood that the above embodiment is only a specific embodiment of the utility model and is not used to limit the utility model, any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A thermal desorption adsorption can, comprising a support and a can body fixed on the support; characterized in that: The bottom of the tank body is fixedly provided with an air inlet pipe communicated with the tank body, the top of the tank body is provided with an air outlet pipe and at least one carbon adding pipe communicated with the tank body, the left side of the tank body is provided with a water inlet pipe and a water return pipe, the water inlet pipe is arranged above the water return pipe, the right side of the tank body is provided with two carbon discharging pipes communicated with the tank body, the tank body is provided with a heat exchange device, the heat exchange device comprises an upper end plate fixed in the tank body, a lower end plate arranged below the upper end plate and parallel to the upper end plate, and two heat exchange mechanisms arranged on the upper end plate and the lower end plate in opposition, the upper end plate and the lower end plate correspond to the carbon discharging pipes one by one, and a plurality of carbon inlet holes are arranged on the upper end plate and the lower end plate, the tank body is provided with two heat exchange zones, the two heat exchange zones are arranged in opposition along the central axis of the tank body, each heat exchange mechanism is arranged in the corresponding heat exchange zone, the heat exchange mechanism comprises a first heat exchange pipe, a second heat exchange pipe and a connecting heat exchange pipe, one end of each first heat exchange pipe is communicated with the water inlet pipe, the other end of each first heat exchange pipe is communicated with the second heat exchange pipe, the other end of each second heat exchange pipe is communicated with the connecting heat exchange pipe, and the other end of each connecting heat exchange pipe is connected to the water return pipe, each first heat exchange pipe, each second heat exchange pipe and the connecting heat exchange pipe comprise a plurality of parallel heat exchange pipes, an upper bend pipe arranged on the upper end of each heat exchange pipe, and a lower bend pipe arranged on the lower end of each heat exchange pipe, the upper end of each heat exchange pipe is connected to the upper end of the adjacent heat exchange pipe on one side through the upper bend pipe, the lower end of each heat exchange pipe is connected to the lower end of the adjacent heat exchange pipe on the other side through the lower bend pipe, each upper bend pipe is arranged above the corresponding carbon inlet hole on the upper end plate, and the projection of the upper bend pipe on the upper end plate partially overlaps the carbon inlet hole, each lower bend pipe is arranged below the corresponding carbon inlet hole on the lower end plate, and the projection of the lower bend pipe on the lower end plate partially overlaps the carbon inlet hole, the first heat exchange pipes of each heat exchange mechanism are arranged in opposition, and the two adjacent first heat exchange pipes are arranged between the oppositely arranged second heat exchange pipes.

2. A thermal desorption adsorption canister according to claim 1, wherein: The first heat exchange pipeline comprises a plurality of first heat exchange sections arranged in parallel and a plurality of bypass bends for connecting the first heat exchange sections, each first heat exchange section comprises a plurality of heat exchange pipes arranged in parallel, a first upper bend arranged at the upper end of the heat exchange pipes, and a first lower bend arranged at the lower end of the heat exchange pipes, the projections of each first upper bend and each first lower bend on the upper end plate or the lower end plate are arranged in a straight line, each bypass bend is arranged non-parallel to the projection of the adjacent first upper bend or first lower bend on the upper end plate, the second heat exchange pipeline comprises a plurality of heat exchange pipes, a second upper bend arranged at the upper end of the heat exchange pipes, and a second lower bend arranged at the lower end of the heat exchange pipes, the density of each heat exchange pipe in the second heat exchange pipeline is greater than the density of each heat exchange pipe in any first heat exchange pipe, each first upper bend and each second upper bend are arranged above the corresponding carbon inlet hole on the upper end plate, the projection of each first upper bend and second upper bend on the upper end plate partially overlaps the carbon inlet hole, each first lower bend and second lower bend are arranged below the corresponding carbon inlet hole on the lower end plate, and the projection of each first lower bend and second lower bend on the lower end plate partially overlaps the carbon inlet hole.

3. A thermal desorption adsorption canister according to claim 2, wherein: The water inlet pipe and the water outlet pipe are each provided with a collecting pipe, each first heat exchange pipeline is connected to the collecting pipe on the water inlet pipe, and each connecting heat exchange pipeline is connected to the collecting pipe on the water outlet pipe.

4. A thermal desorption adsorption canister according to claim 3, wherein: The projections of the centers of any three mutually adjacent carbon inlet holes on the upper end plate or the lower end plate form an equilateral triangle.

5. A thermal desorption adsorption canister according to claim 4, wherein: Each heat exchange pipe is provided with a fin plate on the outer wall.

6. A thermal desorption adsorption canister according to claim 5, wherein: A filter assembly is arranged between the lower end plate and the air inlet pipe, the filter assembly comprises a support angle iron fixed in the tank body, a lower pressing ring fixed on the support angle iron, a first wire mesh arranged on the lower pressing ring, a second wire mesh arranged on the first wire mesh, and an upper pressing ring arranged on the second wire mesh, the upper pressing ring and the lower pressing ring are fixedly connected by a locking piece, and the first wire mesh and the second wire mesh are fixed between the upper pressing ring and the lower pressing ring.

7. A thermal desorption adsorption canister according to claim 6, wherein: The first wire mesh and the second wire mesh each have a mesh number of 40.

8. A thermal desorption adsorption canister according to claim 7, wherein: Each unloading pipe on the tank body is provided with a cover, and each cover is provided with a handle.

9. A thermal desorption adsorption canister according to claim 8, wherein: A plurality of temperature control probe interfaces are arranged between the water inlet pipe and the water outlet pipe.

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