A mobile desorption system for activated carbon fixed beds

Abstract

The utility model discloses a kind of mobile desorption systems for activated carbon fixed bed, it is related to the mobile desorption technical field of activated carbon fixed bed, including cooling heat exchanger, desorption fan, heating heat exchanger, gas filter, vacuum pump, condenser, storage tank and activated carbon fixed bed;Desorption fan, heating heat exchanger, activated carbon fixed bed constitute activated carbon heating loop;Vacuum pump, activated carbon fixed bed constitute vacuum desorption loop;Vacuum pump, condenser and storage tank constitute condensing loop;Desorption fan, activated carbon fixed bed, cooling heat exchanger constitute activated carbon cooling loop.The utility model is a kind of mobile desorption systems for activated carbon fixed bed, solve the problem that activated carbon fixed bed needs to be desorbed by replacing activated carbon and regenerate, realize the in-situ regeneration of activated carbon, save manpower, material resources and time;Simultaneously, after desorption, organic pollutant is realized effective use of resources by condensing mode, reduce energy consumption, reduce carbon emission.

Description

Technical Field

[0001] This utility model relates to the field of mobile desorption technology for activated carbon fixed beds, specifically a mobile desorption system for activated carbon fixed beds. Background Technology

[0002] In the organic waste gas treatment industry, activated carbon fixed bed adsorption technology is a very common technical means due to its high efficiency, stability and economy, and has become the mainstream solution for small and medium-sized enterprises and specific scenarios.

[0003] Activated carbon utilizes its physical properties to adsorb volatile organic compounds (VOCs). Taking advantage of its large specific surface area and strong adsorption capacity, VOCs are adsorbed into the micropores of activated carbon, thereby purifying the emitted waste gas and enabling it to meet emission standards.

[0004] Activated carbon that has become saturated with adsorption can be reused after desorption treatment. Existing fixed-bed activated carbon systems generally do not have desorption devices; instead, they rely on the entire activated carbon being replaced, with centralized desorption and regeneration performed by specialized companies or equipment. The desorption devices used are typically fixed in place and operate at a fixed location.

[0005] This desorption method requires a lot of manpower, resources and time for each replacement, especially for companies where the location of the activated carbon fixed bed is inconvenient for maintenance; and this desorption method cannot meet the environmental protection requirements of distributed treatment and temporary treatment.

[0006] Among them, the utility model patent with publication number CN222287332U, entitled "A Granular Activated Carbon Desorption Device," discloses an activated carbon desorption device. This device requires placing activated carbon in an electric heating box and performing activated carbon desorption under high temperature conditions to remove pollutants from the system and restore the adsorption performance of the activated carbon. This desorption device consumes a large amount of manpower and resources for each activated carbon desorption process, and the pollutants generated during desorption are not properly disposed of.

[0007] Furthermore, a utility model patent with publication number CN213513926U, entitled "A Vehicle-Mounted Activated Carbon Desorption Device," discloses a vehicle-mounted activated carbon desorption device that can be moved by vehicle to the point of activated carbon desorption, avoiding the problem of transporting used activated carbon. It also purifies the desorbed pollutants through catalytic combustion before emission. However, it does not solve the problem of the significant manpower, materials, and time required for removing activated carbon during fixed-bed desorption. Additionally, catalytic combustion consumes a considerable amount of energy. Utility Model Content

[0008] The purpose of this invention is to provide a mobile desorption system for a fixed bed of activated carbon to solve the problems mentioned in the background art.

[0009] To achieve the above objectives, this utility model provides the following technical solution: a mobile desorption system for an activated carbon fixed bed, comprising a cooling heat exchanger, a desorption fan, a heating heat exchanger, a gas filter, a vacuum pump, a condenser, a storage tank, and an activated carbon fixed bed;

[0010] The desorption fan, the heat exchanger, and the activated carbon fixed bed constitute the activated carbon heating circuit.

[0011] The vacuum pump and the activated carbon fixed bed constitute a vacuum desorption circuit;

[0012] The vacuum pump, condenser, and storage tank constitute a condensation circuit;

[0013] The desorption fan, the activated carbon fixed bed, and the cooling heat exchanger constitute the activated carbon cooling circuit.

[0014] In a further embodiment, one end of the cooling heat exchanger is connected to a metal pipe, the other end of the metal pipe is connected to a shut-off valve three, the other end of the cooling heat exchanger is connected to a three-way metal pipe, and one of the other two openings of the three-way metal pipe is connected to the inlet of the desorption fan, and the other is connected to a shut-off valve four.

[0015] The chilled water interface of the cooling heat exchanger is a flange interface and is connected to a chilled water pipe.

[0016] In a further embodiment, the outlet of the desorption fan is also connected to a three-way metal pipe, one of the other two openings of the three-way metal pipe is connected to one end of the heating heat exchanger, and the other opening is connected to a shut-off valve.

[0017] The other end of the heat exchanger is also connected to a three-way metal pipe, and the other two openings of the three-way metal pipe are respectively connected to shut-off valve one and shut-off valve six.

[0018] In a further embodiment, the other end of the shut-off valve one is also connected to a three-way metal pipe, and the other two openings of the three-way metal pipe are respectively connected to a nitrogen delivery pipe and the shut-off valve two.

[0019] The other ends of the shut-off valves 2, 3, and 6 are connected to a four-way metal pipe. The remaining end of the four-way metal pipe is connected to a retractable air duct. The other end of the retractable air duct is connected to the flange of the desorption device on the activated carbon fixed bed.

[0020] The other end of the shut-off valve and the shut-off valve five are also connected to a four-way metal pipe. One of the remaining two openings of the four-way metal pipe is connected to the shut-off valve seven, and the other is also connected to a retractable air duct. The other end of the retractable air duct is also connected to the flange of the desorption device on the activated carbon fixed bed.

[0021] In a further embodiment, the other end of the shut-off valve seven is also connected to a metal pipe, the end of which is connected to the inlet of the gas filter.

[0022] In a further embodiment, the outlet of the gas filter is also connected to a metal pipe, which is connected to the inlet of the vacuum pump.

[0023] In a further embodiment, the outlet of the vacuum pump is also connected to a metal pipe, which is connected to the inlet of the condenser.

[0024] In a further embodiment, the outlet of the condenser is also connected to a metal pipe, the other end of which leads directly into the storage tank. The chilled water interface of the condenser is a flange interface and is connected to a chilled water pipe.

[0025] Compared with the prior art, the beneficial effects of this utility model are:

[0026] 1. This utility model is a mobile desorption system for activated carbon fixed beds. It adopts a mobile activated carbon desorption device, which can be moved to the vicinity of the activated carbon fixed bed. The device is connected to the inlet and outlet of the activated carbon fixed bed through its own retractable air duct, which can realize the regeneration of activated carbon. At the same time, it can directly avoid the manpower and material consumption during the loading and unloading of activated carbon in the activated carbon fixed bed, save resources and reduce carbon emissions. In addition, the desorbed organic matter can also be recycled.

[0027] 2. This utility model adopts a vacuum desorption method, combined with solvent condensation, to achieve efficient utilization of resources. Attached Figure Description

[0028] Figure 1 This is a schematic diagram showing the assembly and distribution of the main structure of this utility model.

[0029] In the diagram: 1. Cooling heat exchanger; 2. Desorption fan; 3. Heating heat exchanger; 4. Gas filter; 5. Vacuum pump; 6. Condenser; 7. Storage tank; 8. Activated carbon fixed bed; 9. Desorption device connecting flange; 10. Shut-off valve one; 11. Shut-off valve two; 12. Shut-off valve three; 13. Shut-off valve four; 14. Shut-off valve five; 15. Shut-off valve six; 16. Shut-off valve seven. Detailed Implementation

[0030] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0031] This embodiment provides a moving desorption system for an activated carbon fixed bed 8, such as... Figure 1 As shown, it includes a cooling heat exchanger 1, a desorption fan 2, a heating heat exchanger 3, a gas filter 4, a vacuum pump 5, a condenser 6, a storage tank 7, and an activated carbon fixed bed 8.

[0032] Specifically, one end of the cooling heat exchanger 1 is connected to a metal pipe, and the other end of the metal pipe is connected to a shut-off valve 12. The other end of the cooling heat exchanger 1 is connected to a three-way metal pipe, and one of the other two openings of the three-way metal pipe is connected to the inlet of the desorption fan 2, and the other is connected to a shut-off valve 13.

[0033] The chilled water interface of cooling heat exchanger 1 is a flange interface and is connected to a chilled water pipe.

[0034] The outlet of the desorption fan 2 is also connected to a three-way metal pipe. One of the other two openings of the three-way metal pipe is connected to one end of the heating heat exchanger 3, and the other opening is connected to a shut-off valve 14.

[0035] The other end of the heating heat exchanger 3 is also connected to a three-way metal pipe, and the other two openings of the three-way metal pipe are respectively connected to shut-off valve 10 and shut-off valve 6 15.

[0036] The other end of shut-off valve 10 is also connected to a tee metal pipe, and the other two openings of the tee metal pipe are connected to a nitrogen gas delivery pipe and shut-off valve 21, respectively.

[0037] The other ends of shut-off valve 2 (11), shut-off valve 3 (12), and shut-off valve 6 (15) are connected to a four-way metal pipe. The remaining end of the four-way metal pipe is connected to a retractable air duct. The other end of the retractable air duct is connected to the desorption device flange 9 on the activated carbon fixed bed 8.

[0038] The other end of the shut-off valve and shut-off valve 514 are also connected to a four-way metal pipe. One of the remaining two openings of the four-way metal pipe is connected to shut-off valve 716, and the other is connected to a retractable air duct. The other end of the retractable air duct is also connected to the desorption device connecting flange 9 on the activated carbon fixed bed 8.

[0039] The other end of the shut-off valve 716 is also connected to a metal pipe, the end of which is connected to the inlet of the gas filter 4.

[0040] The outlet of gas filter 4 is also connected to a metal pipe, which is connected to the inlet of vacuum pump 5.

[0041] The outlet of vacuum pump 5 is also connected to a metal pipe, which is connected to the inlet of condenser 6.

[0042] The outlet of condenser 6 is also connected to a metal pipe, the other end of which leads directly into storage tank 7. The chilled water interface of condenser 6 is a flange interface and is connected to a chilled water pipe.

[0043] Activated carbon fixed bed 8: An environmentally friendly treatment device based on the principle of adsorption. The core uses granular or columnar activated carbon as the adsorption medium, which is filled into a fixed container (bed). When fluid (gas or liquid) passes through the bed, pollutants are selectively adsorbed by the activated carbon, thereby achieving the purification goal.

[0044] Mobile desorption unit: A modular environmental protection device that can be flexibly deployed to achieve in-situ regeneration of adsorbent (activated carbon) and recovery / treatment of pollutants through physical or chemical means, combining high efficiency, mobility and rapid response capability.

[0045] Activated carbon utilizes its physical properties to adsorb volatile organic compounds (VOCs). Taking advantage of its large specific surface area and strong adsorption capacity, VOCs are adsorbed into the micropores of activated carbon, thereby purifying the emitted waste gas and enabling it to meet emission standards.

[0046] Once the activated carbon fixed bed 8 that needs to be desorbed is identified, the mobile desorption device is moved to the vicinity of the activated carbon fixed bed 8; the entire in-situ desorption process of activated carbon is as follows:

[0047] 1. With the inlet and outlet valves of the activated carbon fixed bed 8 closed, open the blind plate on the desorption device connecting flange 9 and connect the retractable air duct of the movable desorption device to the desorption device connecting flange 9; at this time, the internal shut-off valves 10, 21, 312, 413, 514, 615 and 716 of the desorption device are all in the closed state.

[0048] Objective: To switch the activated carbon fixed bed 8 from adsorption mode, offline, ready mode to in-situ desorption mode.

[0049] Advantages: In-situ switching only requires the disassembly and assembly of the flange, without having to remove all the activated carbon in the activated carbon fixed bed 8 and fill it with new activated carbon (especially for activated carbon fixed beds 8 located at high places such as rooftops, which would require the use of large lifting equipment).

[0050] 2. Nitrogen purging: Open shut-off valve 10, shut-off valve 5, and the exhaust valve of the activated carbon tank. Nitrogen enters the activated carbon fixed bed 8 from below, and the air in the activated carbon fixed bed 8 is discharged from the system through the original exhaust valve at the top. Continue until the oxygen content in the activated carbon tank is lower than 3%. Nitrogen purging is complete. Close shut-off valve 10, shut-off valve 5, and the exhaust valve of the activated carbon fixed bed 8.

[0051] Purpose: The purpose of nitrogen replacement is to reduce the oxygen content in the system to below 3% to ensure the safety of the "activated carbon heating" process.

[0052] 3. The activated carbon heating circuit consists of desorption fan 2, heat exchanger 3, and activated carbon fixed bed 8: Open shut-off valve 4 (13) and shut-off valve 6 (15), gradually start desorption fan 2, open heat exchanger 3, and gradually fill the system with nitrogen. Hot nitrogen enters the activated carbon from the top of the activated carbon fixed bed 8 and is extracted from the bottom by desorption fan 2, continuously circulating and heating the activated carbon to the set temperature. Close heat exchanger 3, desorption fan 2, shut-off valve 4 (13), and shut-off valve 6 (15) to complete the activated carbon heating process.

[0053] By using a circulating heating method, the organic pollutants adsorbed by the activated carbon are concentrated in the lower part of the activated carbon, and the adsorption concentration of the activated carbon is greatly increased, which is beneficial to improving the efficiency of subsequent vacuum desorption.

[0054] The set temperature for activated carbon heating is related to the physical properties of the organic pollutants adsorbed by the activated carbon, such as the boiling point and saturated vapor pressure.

[0055] Objective: To use nitrogen as a medium to circulate and heat activated carbon, creating a temperature gradient between the top and bottom of the activated carbon, thereby forming a concentration gradient of adsorbed organic matter in the activated carbon.

[0056] Advantages: The nitrogen circulation heating method results in low nitrogen consumption and low operating costs. The formation of a concentration gradient of organic matter within the activated carbon is beneficial for improving the efficiency of vacuum desorption.

[0057] 4. Vacuum pump 5 and activated carbon fixed bed 8 form a vacuum desorption circuit: Open shut-off valve 7 16, start vacuum pump 5, and continuously extract the gas in activated carbon fixed bed 8 until the vacuum degree in activated carbon fixed bed 8 reaches below -98kPa; reduce the frequency of vacuum pump 5, open shut-off valve 2 11, and replenish nitrogen into activated carbon fixed bed 8 until the vacuum degree reaches above -95kPa; close shut-off valve 2 11, restore the frequency of vacuum pump 5, and continuously extract the gas in activated carbon fixed bed 8 until the vacuum degree in activated carbon fixed bed 8 reaches below -98kPa; repeat this process 3-5 times until all organic pollutants in activated carbon fixed bed 8 are desorbed.

[0058] Vacuum pump 5, condenser 6 and storage tank 7 form a condensation circuit: the exhaust gas extracted by vacuum pump 5 is mainly nitrogen and gaseous organic pollutants. The exhaust gas enters condenser 6, and the temperature of the exhaust gas is reduced to below 5°C through indirect heat exchange with chilled water. A large amount of organic waste gas is condensed into liquid solvent and enters storage tank 7.

[0059] The solvent obtained from condensation can be reused in the production process depending on its specific composition; or it can be used as a liquid fuel to recover its heat energy by burning in a fuel boiler or regenerative combustion furnace.

[0060] After completing vacuum desorption, close shut-off valve 7 16 and stop vacuum pump 5; open shut-off valve 2 11, replenish nitrogen to the activated carbon fixed bed 8 to atmospheric pressure, and close shut-off valve 2 11.

[0061] Objective: To desorb a large amount of organic matter from activated carbon into a small amount of nitrogen gas by depressurization (vacuum) desorption, and to recover the organic solvent by condensation.

[0062] Advantages: This method effectively combines thermal desorption and pressure-reducing desorption, maximizing the desorption of organic matter adsorbed from activated carbon. Furthermore, repeated vacuuming allows for multiple rinsing processes, improving the desorption efficiency of the activated carbon and reducing operating energy consumption. The condensed solvent can be reused in the production process based on its composition, or used as a liquid fuel to recover its heat energy, maximizing resource utilization.

[0063] The method of vacuum desorption combined with solvent condensation is used to achieve efficient utilization of resources.

[0064] 5. The activated carbon cooling circuit consists of desorption fan 2, activated carbon fixed bed 8, and cooling heat exchanger 1: Open shut-off valve 3 12 and shut-off valve 5 14, and gradually start desorption fan 2 to extract the high-temperature nitrogen gas in activated carbon fixed bed 8 from the top. After being cooled by cooling heat exchanger 1, it is sent to the bottom of activated carbon fixed bed 8 by desorption fan 2.

[0065] The activated carbon in the activated carbon fixed bed 8 is cooled to below 35°C using a circulating cooling method. The desorption fan 2, shut-off valve 3 (12), and shut-off valve 5 (14) are then turned off.

[0066] Objective: To cool the desorbed activated carbon by circulating nitrogen gas to bring it back to room temperature, allowing it to perform normal adsorption.

[0067] Advantages: By using nitrogen for circulating cooling, the system safety is ensured while reducing nitrogen consumption and lowering operating costs.

[0068] 6. After in-situ desorption of activated carbon from the fixed bed 8 is completed, all internal equipment of the mobile desorption device, shut-off valves 1-10, 11-12, 13-14, 15-16, and 16-16 are closed. The connection between the retractable duct of the mobile desorption device and the connecting flange 9 is removed, and a blind flange is installed on the connecting flange 9. The fixed activated carbon bed 8 can then be resumed for normal use.

[0069] This application uses a mobile activated carbon desorption device, which can be moved to the vicinity of the activated carbon fixed bed 8. The device is connected to the inlet and outlet of the activated carbon fixed bed 8 through its own retractable air duct, which can realize the regeneration of activated carbon. At the same time, it can directly avoid the consumption of manpower and material resources when loading and unloading activated carbon in the activated carbon fixed bed 8, save resources and reduce carbon emissions. In addition, the desorbed organic matter can also be recycled.

[0070] For example, an activated carbon tank is installed on the roof of a 10-meter-high factory building to treat low-concentration organic waste gas generated inside the factory (the organic waste gas includes ethyl acetate, toluene, methyl ethyl ketone, etc., mainly ethyl acetate); the activated carbon tank has a diameter of 2.8 meters, a height of 3.0 meters, and an internal activated carbon layer height of 800 mm; the activated carbon is in columnar granular form with a bulk density of 0.4-0.5 t / m³. 3 The activated carbon loading is 2.5t.

[0071] Activated carbon outlet concentration greater than 50 mg / m³ 3 At this time, activated carbon desorption is performed, and the adsorption capacity of organic matter is approximately 0.1 g / g.

[0072] Move this unit to the ground around the plant and connect it to the utilities, i.e., connect it to the power supply, chilled water via flange, and nitrogen via flange; (chilled water and nitrogen can be provided in the plant area. If chilled water or nitrogen cannot be provided in the plant area, this unit can be equipped with a small chiller or nitrogen generator.)

[0073] After the device is in place, close the inlet and outlet valves of the activated carbon tank, exit the adsorption mode, and enter the desorption mode. Open the blind flange on the desorption device connecting flange 9 on the activated carbon tank, and connect the retractable duct flange of this device to the desorption device connecting flange 9. At this time, the following valves inside the device are closed: shut-off valve 10, shut-off valve 21, shut-off valve 312, shut-off valve 413, shut-off valve 514, shut-off valve 615, and shut-off valve 716.

[0074] After the device and activated carbon tank are connected and installed in place, the activated carbon fixed bed 8 desorption process begins step by step:

[0075] (1) Nitrogen purging: Open shut-off valve 10, shut-off valve 5, and the discharge valve of the activated carbon tank. Nitrogen enters the activated carbon fixed bed 8 from below, controlling the nitrogen flow rate to 100-150 m³ / h. 3 / h, the air in the activated carbon fixed bed 8 is discharged from the system through the original exhaust valve above; until the oxygen content in the activated carbon tank is lower than 3%; nitrogen replacement is completed, and shut-off valve 10, shut-off valve 514, and the exhaust valve of the activated carbon fixed bed 8 are closed.

[0076] The nitrogen replacement process lasts 10-20 minutes, and the nitrogen consumption is approximately 40m³. 3 .

[0077] (2) Activated carbon heating: Open shut-off valve 4 (13) and shut-off valve 6 (15), and gradually start desorption fan 2. The fan air volume is 5000 m³ / h. 3 / h; Turn on the heating heat exchanger 3 (electric heating device), and gradually heat the system by filling it with nitrogen. The hot nitrogen enters the activated carbon from the top of the activated carbon fixed bed 8 and is drawn out from the bottom by the desorption fan 2, continuously circulating and heating the activated carbon to the set temperature (temperature of the upper part of the activated carbon 100-110℃, temperature of the lower layer of activated carbon 70-80℃). Turn off the heating heat exchanger 3, the desorption fan 2, and shut off valves 13 and 15 to complete the heating of the activated carbon.

[0078] The duration of the activated carbon heating process is 60-120 minutes, which is related to the absorption solvent components and the nitrogen heating rate.

[0079] (3) Vacuum desorption and condensation recovery: Open shut-off valve 716 and start vacuum pump 5 (the vacuum pump is a dry screw vacuum pump with a flow rate of 80 m³ / h). 3 / h), continuously extract the gas from the activated carbon fixed bed 8 until the vacuum degree inside the activated carbon fixed bed 8 reaches below -98kPa; reduce the frequency of vacuum pump 5, open shut-off valve 2 11, and replenish nitrogen into the activated carbon fixed bed 8 until the vacuum degree reaches above -95kPa; close shut-off valve 2 11, restore the frequency of vacuum pump 5, and continuously extract the gas from the activated carbon fixed bed 8 until the vacuum degree inside the activated carbon fixed bed 8 reaches below -98kPa; repeat this process 55 times to desorb all organic pollutants from the activated carbon fixed bed 8.

[0080] The exhaust gas extracted by vacuum pump 5 mainly consists of nitrogen and gaseous organic pollutants. This exhaust gas enters condenser 6, where the temperature is lowered to below 5°C by 3°C chilled water. A large amount of organic waste gas condenses into liquid solvent and enters storage tank 7. Chilled water flow rate: -6m³ / h 3 / h.

[0081] After completing vacuum desorption, close shut-off valve 7 16 and stop vacuum pump 5; open shut-off valve 2 11, replenish nitrogen to the activated carbon fixed bed 8 to atmospheric pressure, and close shut-off valve 2 11.

[0082] The vacuum desorption and condensation recovery process lasts for 60-80 minutes.

[0083] (4) Cooling of activated carbon: Open shut-off valve 312 and shut-off valve 514, and gradually turn on desorption fan 2 to extract the high-temperature nitrogen gas in the activated carbon fixed bed 8 from the top. After being cooled by cooling heat exchanger 1, it is sent to the bottom of activated carbon fixed bed 8 by desorption fan 2.

[0084] The activated carbon in the activated carbon fixed bed 8 is cooled to below 35°C using a circulating cooling method. The desorption fan 2, shut-off valve 3 (12), and shut-off valve 5 (14) are then turned off.

[0085] Cooling heat exchanger 1 is cooled by circulating cooling water at 32℃, with a circulating cooling water flow rate of 8-10 m³ / h. 3 / h.

[0086] The activated carbon cooling process lasts approximately 60 minutes, depending on the nitrogen cooling rate.

[0087] After desorption of the activated carbon tank is completed, close the following internal shut-off valves: shut-off valve 10, shut-off valve 21, shut-off valve 312, shut-off valve 413, shut-off valve 514, shut-off valve 615, and shut-off valve 716. Shut down the equipment and disconnect the power supply. Disconnect the retractable duct from the desorption device's connecting flange 9 and install the blind flange on the desorption device's connecting flange 9. The activated carbon fixed bed 8 can then resume normal adsorption operation.

[0088] This activated carbon desorption process consumed 60-70 mg of nitrogen. 3 Power consumption: 180-200 kWh; Chilled water consumption: 6-8 m³ 3 .

[0089] The parameters of this device compared with those of conventional nitrogen desorption are shown in the table below (taking the desorption of 2.5t activated carbon fixed bed 8 in this embodiment as an example):

[0090]

[0091] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A moving desorption system for an activated carbon fixed bed (8), characterized in that, include: Cooling heat exchanger (1), desorption fan (2), heating heat exchanger (3), gas filter (4), vacuum pump (5), condenser (6), storage tank (7) and activated carbon fixed bed (8); The desorption fan (2), the heating heat exchanger (3), and the activated carbon fixed bed (8) constitute the activated carbon heating circuit; The vacuum pump (5) and the activated carbon fixed bed (8) constitute a vacuum desorption circuit; The vacuum pump (5), condenser (6), and storage tank (7) constitute a condensation circuit; The desorption fan (2), the activated carbon fixed bed (8), and the cooling heat exchanger (1) constitute the activated carbon cooling circuit.

2. The moving desorption system for an activated carbon fixed bed (8) according to claim 1, characterized in that, One end of the cooling heat exchanger (1) is connected to a metal pipe, and the other end of the metal pipe is connected to a shut-off valve three (12). The other end of the cooling heat exchanger (1) is connected to a three-way metal pipe. One of the other two openings of the three-way metal pipe is connected to the inlet of the desorption fan (2), and the other is connected to a shut-off valve four (13). The chilled water interface of the cooling heat exchanger (1) is a flange interface and is connected to a chilled water pipe.

3. The moving desorption system for an activated carbon fixed bed (8) according to claim 2, characterized in that, The outlet of the desorption fan (2) is also connected to a three-way metal pipe. One of the other two openings of the three-way metal pipe is connected to one end of the heating heat exchanger (3), and the other opening is connected to a shut-off valve (14). The other end of the heating heat exchanger (3) is also connected to a three-way metal pipe, and the other two openings of the three-way metal pipe are respectively connected to shut-off valve one (10) and shut-off valve six (15).

4. The moving desorption system for an activated carbon fixed bed (8) according to claim 3, characterized in that, The other end of the shut-off valve one (10) is also connected to a three-way metal pipe, and the other two openings of the three-way metal pipe are respectively connected to a nitrogen gas delivery pipe and shut-off valve two (11); The other ends of the shut-off valves 2 (11), 3 (12), and 6 (15) are connected to a four-way metal pipe. The remaining end of the four-way metal pipe is connected to a retractable air duct. The other end of the retractable air duct is connected to the desorption device connecting flange (9) on the activated carbon fixed bed (8). The other end of the shut-off valve and the shut-off valve five (14) are also connected to a four-way metal pipe. One of the remaining two openings of the four-way metal pipe is connected to the shut-off valve seven (16), and the other is connected to a retractable air duct. The other end of the retractable air duct is also connected to the desorption device connecting flange (9) on the activated carbon fixed bed (8).

5. The moving desorption system for an activated carbon fixed bed (8) according to claim 4, characterized in that, The other end of the shut-off valve (16) is also connected to a metal pipe, the end of which is connected to the inlet of the gas filter (4).

6. The moving desorption system for an activated carbon fixed bed (8) according to claim 5, characterized in that, The outlet of the gas filter (4) is also connected to a metal pipe, which is connected to the inlet of the vacuum pump (5).

7. The moving desorption system for an activated carbon fixed bed (8) according to claim 6, characterized in that, The outlet of the vacuum pump (5) is also connected to a metal pipe, which is connected to the inlet of the condenser (6).

8. The moving desorption system for an activated carbon fixed bed (8) according to claim 7, characterized in that, The outlet of the condenser (6) is also connected to a metal pipe, the other end of which is directly connected to the storage tank (7). The chilled water interface of the condenser (6) is a flange interface and is connected to a chilled water pipe.

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