Activated carbon circulating desorption organic waste gas treatment device

Abstract

The utility model relates to a kind of active carbon cyclic desorption organic waste gas treatment device, belong to organic waste gas treatment technical field. Including: air inlet area, photocatalytic area, adsorption area and exhaust area are sequentially communicated, and back air passage is separately communicated and arranged between exhaust area and air inlet area;Air inlet is arranged on the side of air inlet area away from photocatalytic area, catalytic module is arranged in photocatalytic area, and adsorption module is arranged in adsorption area;Fan module is arranged in exhaust area, and fan module is arranged on the side close to adsorption module;Exhaust port is arranged on the side of exhaust area away from adsorption area;Back air passage is provided with back air inlet at the junction of exhaust area, and back air passage is provided with degassing inlet at the junction of air inlet area;Wherein, valve is arranged at air inlet, exhaust port, back air inlet and degassing inlet place.The utility model can recycle honeycomb activated carbon by the above-mentioned setting, reduce hazardous waste, thereby improve organic waste gas treatment efficiency.

Description

Technical Field

[0001] This utility model relates to the field of organic waste gas treatment technology, and in particular to an activated carbon circulating desorption organic waste gas treatment device. Background Technology

[0002] In the current field of environmental governance, volatile organic compounds (VOCs) have become the most prominent pollutants after sulfur dioxide (SO2) and nitrogen oxides (NOx). x Following air pollution, VOCs have become another critical pollutant that seriously impacts the ecological environment and human production and life. Large-scale VOC emissions not only exacerbate air pollution, causing environmental problems such as smog and photochemical smog, but also pose a potential threat to human health, placing heavy pressure on environmental carrying capacity and social life. Currently, VOC emissions are characterized by large total emissions and complex sources. Their sources are widely distributed across multiple key industries such as coating, printing, chemicals, and electronics manufacturing. The composition, concentration, and emission characteristics of VOCs vary significantly across different industries, undoubtedly increasing the overall difficulty of VOCs treatment. In the VOCs treatment technology system, catalytic oxidation technology, with its high efficiency and thorough treatment advantages, has become one of the effective methods for removing VOCs. The core principle of this technology is that under specific heating conditions, with the help of a catalyst, VOCs undergo a full oxidation reaction with oxygen, ultimately converting them into harmless water (H2O) and carbon dioxide (CO2), achieving the harmless treatment of VOCs without generating secondary pollution. It has broad application prospects in industrial VOCs treatment.

[0003] However, in the current situation of VOCs treatment, due to limitations in funding, technology, and site availability, most small and medium-sized enterprises (SMEs) still commonly use a combination of UV photolysis and honeycomb activated carbon adsorption to treat organic waste gas. While this process can treat organic waste gas to a certain extent and meet basic environmental emission requirements, it has a significant drawback in actual operation: high operating costs. This problem manifests in two main ways: First, honeycomb activated carbon, as the core adsorption material in this process, reaches adsorption saturation after a period of use and needs to be replaced regularly. Frequent replacement not only increases material procurement costs but also raises labor maintenance costs. Second, the saturated honeycomb activated carbon, having adsorbed a large amount of organic pollutants, is classified as hazardous waste and needs to be disposed of in compliance with regulations by qualified professional institutions, further incurring high hazardous waste disposal costs. These excessively high operating costs place a heavy economic burden on SMEs, making it difficult for some small businesses to guarantee the long-term stable operation of this process and severely hindering the effective advancement of VOCs treatment efforts within SMEs. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is to overcome the problem that honeycomb activated carbon in the catalytic oxidation device for organic waste gas in the prior art needs to be replaced regularly and that the replaced honeycomb activated carbon needs to be treated as hazardous waste. Thus, a device for treating organic waste gas by circulating activated carbon desorption is provided, which can recycle honeycomb activated carbon, reduce the generation of hazardous waste, and improve working efficiency.

[0005] To solve the above-mentioned technical problems, this utility model provides an activated carbon circulating desorption organic waste gas treatment device, comprising: The air intake area, photocatalytic area, adsorption area and exhaust area are connected in sequence, and the exhaust area and the air intake area are connected by a return air channel. An air inlet is provided on the side of the air intake area away from the photocatalytic area; a catalytic module is provided in the photocatalytic area; and an adsorption module is provided in the adsorption area. A fan module is provided in the exhaust area, and the fan module is located on the side close to the adsorption module; an exhaust port is provided on the side of the exhaust area away from the adsorption area. A return air inlet is provided at the connection between the return air duct and the exhaust area, and a degassing inlet is provided at the connection between the return air duct and the air intake area; wherein, valves are provided at the air intake, the exhaust outlet, the return air inlet and the degassing inlet.

[0006] In one embodiment of the present invention, the adsorption module includes an activated carbon adsorption submodule and an additional adsorption submodule; the activated carbon adsorption submodule and the additional adsorption submodule are arranged sequentially along the airflow direction, and a first gas flow space is reserved between the activated carbon adsorption submodule and the additional adsorption submodule to allow for a smooth transition of the airflow.

[0007] In one embodiment of this utility model, gas probes are provided on both sides of the activated carbon adsorption submodule.

[0008] In one embodiment of this utility model, the activated carbon adsorption submodule includes multiple honeycomb activated carbon adsorption units.

[0009] In one embodiment of this utility model, a second gas flow space is reserved between the catalytic module and the activated carbon adsorption submodule to allow for a smooth transition of gas flow.

[0010] In one embodiment of this utility model, a first valve is provided at the air inlet, a second valve is provided at the exhaust outlet, a third valve is provided at the return air outlet, and a fourth valve is provided at the degassing inlet; wherein, the third valve is located in the return air channel, and the fourth valve is located in the air inlet area.

[0011] In one embodiment of this utility model, the first valve, the second valve, and the third valve are all electric air valves, and the fourth valve is a one-way check valve.

[0012] In one embodiment of the present invention, the catalytic module includes a plurality of UV lamps and a catalyst plate, wherein the plurality of UV lamps are arranged at intervals.

[0013] In one embodiment of the present invention, the inner wall of the air intake area is provided with an airflow distribution plate, and the airflow distribution plate is provided with a plurality of distribution holes.

[0014] In one embodiment of this utility model, a housing is further included, the housing being provided with a first opening and a second opening; the inner diameters of the first opening and the second opening are respectively adapted to the outer diameters of the air inlet and the exhaust outlet.

[0015] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial effects: (1) The activated carbon circulating desorption organic waste gas treatment device of this utility model achieves efficient dual treatment of organic waste gas through the synergistic effect of the photocatalytic zone and the adsorption zone. The waste gas is first decomposed by photocatalysis in the photocatalytic zone, and then enters the adsorption zone, where the adsorption module adsorbs the residual pollutants. This process significantly improves the purification efficiency and ensures that the treated gas meets environmental emission standards. The return air channel equipped in the device guides the airflow circulation during the desorption process, which not only promotes the full desorption of the activated carbon module and restores its adsorption performance, but also reduces the hazardous waste generated by replacing activated carbon, reduces the environmental protection cost of enterprises, reduces the dependence on external fresh air, reduces energy consumption, and improves the overall energy efficiency. In addition, by setting up the return air channel and using the second and third valves to control the gas flow direction, in-situ desorption of the activated carbon adsorption sub-module can be achieved.

[0016] (2) The modular design and application of automated control of this utility model not only improve the working efficiency of the device, but also reduce the cost of manual operation, giving this device a significant advantage in the field of organic waste gas treatment. Attached Figure Description

[0017] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the structure of an activated carbon circulating desorption organic waste gas treatment device according to this utility model.

[0019] Explanation of reference numerals in the instruction manual: 1. Air intake area; 11. Air inlet; 12. First valve; 2. Photocatalytic area; 21. Catalytic module; 3. Adsorption area; 31. Activated carbon adsorption submodule; 32. Additional adsorption submodule; 33. Gas probe; 4. Exhaust area; 41. Fan module; 42. Exhaust port; 43. Second valve; 5. Return air passage; 51. Return air inlet; 52. Degassing inlet; 53. Third valve; 54. Fourth valve; 6. Housing. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention. Example

[0021] Reference Figure 1 As shown, this utility model provides an activated carbon circulating desorption organic waste gas treatment device, comprising: The air intake area 1, photocatalytic area 2, adsorption area 3 and exhaust area 4 are connected in sequence. The exhaust area 4 and the air intake area 1 are connected by a return air channel 5. An air inlet 11 is provided on the side of the air intake area 1 away from the photocatalytic area 2. A catalytic module 21 is provided in the photocatalytic area 2, and an adsorption module is provided in the adsorption area 3. A fan module 41 is provided in the exhaust zone 4, and the fan module 41 is located on the side close to the adsorption module; an exhaust port 42 is provided on the side of the exhaust zone 4 away from the adsorption zone 3. A return air inlet 51 is provided at the connection between the return air duct 5 and the exhaust area 4, and a degassing inlet 52 is provided at the connection between the return air duct 5 and the air intake area 1; valves are provided at the air intake 11, the exhaust port 42, the return air inlet 51 and the degassing inlet 52.

[0022] This invention discloses an activated carbon circulating desorption organic waste gas treatment device, which combines a photocatalytic zone and an adsorption zone to achieve dual treatment of organic waste gas. The gas first undergoes photocatalytic decomposition, and then the adsorption module adsorbs residual pollutants, thereby improving purification efficiency and ensuring that the treated gas meets environmental emission standards. The return air channel design allows for airflow circulation during desorption, which not only helps the activated carbon module to fully desorb and restore its adsorption capacity, reducing hazardous waste generated from activated carbon replacement and lowering environmental costs for enterprises, but also reduces dependence on external fresh air, lowers energy consumption, and improves the overall energy efficiency of the device. The fan module is located near the adsorption module, enabling more effective airflow and further reducing energy loss. Furthermore, the modular design and automated control further improve the device's operating efficiency and reduce manual operation costs.

[0023] Specifically, the adsorption module includes an activated carbon adsorption submodule 31 and an additional adsorption submodule 32 for adsorbing activated carbon dust. These two submodules are arranged sequentially along the airflow direction, forming a progressive adsorption treatment pathway. The additional adsorption submodule 32 is primarily used to capture activated carbon dust that may be generated during the activated carbon adsorption process, preventing the dust from entering subsequent systems with the airflow and causing pollution or loss. The activated carbon adsorption submodule 31, on the other hand, undertakes the core function of adsorbing organic waste gas.

[0024] Furthermore, to ensure stable airflow, the activated carbon adsorption submodule 31 and the additional adsorption submodule 32 are arranged sequentially along the airflow direction. A first gas flow space is reserved between the two submodules to allow for a smooth transition of airflow. This space buffers airflow disturbances, enabling the gas to form a uniform flow field before entering the next submodule, thereby improving the overall adsorption efficiency. In addition, gas probes 33 are provided on both sides of the activated carbon adsorption submodule 31. The gas probes 33 are used to detect the concentration change of the gas before and after passing through the module.

[0025] Specifically, the activated carbon adsorption submodule 31 comprises multiple honeycomb activated carbon adsorption units, which are assembled through standardized structural connections to form a complete adsorption operating area. The honeycomb activated carbon adsorption units employ a honeycomb porous structure, characterized by a large specific surface area and uniform pore distribution. This maximizes the contact area with organic waste gas, improving single-pass adsorption efficiency, while also reducing airflow resistance and ensuring smooth gas flow within the module. The combined design of multiple units not only allows for flexible adjustment of the overall adsorption capacity of the module according to the actual waste gas treatment volume but also facilitates the subsequent maintenance and replacement of individual units, preventing the failure of a single unit from affecting the operation of the entire adsorption submodule. Furthermore, it provides a structural basis for uniform airflow purging and thorough removal of organic matter during subsequent desorption, ensuring the stability and consistency of the desorption effect.

[0026] Specifically, in this embodiment, a second gas flow space is reserved between the catalytic module 21 and the activated carbon adsorption submodule 31 to allow for a smooth transition of the gas flow. This space is designed to fully accommodate the path requirements of the gas flow from the catalytic module 21 to the activated carbon adsorption submodule 31. After the gas flow completes the reaction treatment in the catalytic module 21, it first enters this transition space. Through the optimized flow field structure within the space, the potential local turbulence or uneven flow velocity at the outlet of the catalytic module 21 can be effectively eliminated, allowing the gas flow to gradually form a stable and uniform flow pattern. Once the gas flow stabilizes, it then enters the activated carbon adsorption submodule 31 for adsorption treatment. This avoids the impact and loss of turbulent airflow on the honeycomb structure inside the activated carbon adsorption submodule 31, while ensuring sufficient and uniform contact between the gas flow and the honeycomb activated carbon adsorption unit, maximizing the utilization rate of the adsorption area and improving the adsorption efficiency of organic waste gas. Simultaneously, this transition space also balances the gas pressure at the junction of the two modules, preventing airflow fluctuations from affecting the overall operational stability of the device, and providing a stable flow field basis for subsequent accurate detection of concentration changes before and after activated carbon adsorption using the gas probe 33.

[0027] Specifically, refer to Figure 1 As shown, a first valve 12 is installed at the air inlet 11, a second valve 43 is installed at the exhaust outlet 42, a third valve 53 is installed at the return air outlet 51, and a fourth valve 34 is installed at the degassing inlet 52. The third valve 53 is built into the return air channel 5, and the fourth valve is located within the air inlet area 1. Through the structured design of the return air channel 5, combined with the precise switching control of the gas flow direction by the second valve 43 and the third valve 53, this embodiment can effectively achieve in-situ desorption of the activated carbon adsorption submodule 31. This design not only optimizes the gas flow path but also improves the overall operating efficiency and desorption effect of the device.

[0028] Furthermore, in the selection and design of this embodiment, considering the requirements for automated control and stability of air path switching, the first valve 12, the second valve 43, and the third valve 53 are preferably electric air valves. These valves can quickly respond to switching actions via electrical control signals, accurately matching the airflow path switching requirements of different operating conditions such as adsorption and desorption. Meanwhile, the fourth valve 34 is preferably a one-way check valve. Its core function is to effectively prevent airflow from flowing back into the return air channel 5 during adsorption. Although electric valves can also achieve this function, one-way check valves have significant advantages in cost control and system simplification. Specifically, one-way check valves do not require additional electrical control connection points, thereby reducing system complexity, reducing the risk of failure, and further improving the reliability and economy of the entire device.

[0029] Specifically, in this embodiment, the catalytic module 21 includes multiple UV lamps and a catalyst plate, wherein the multiple UV lamps are arranged at intervals. When the gas passes through the UV photocatalytic module 21, the organic waste gas components can be oxidized and decomposed into small molecule harmless substances under the action of UV light and catalyst, and then discharged after being efficiently adsorbed by honeycomb activated carbon.

[0030] Specifically, in this embodiment, the inner wall of the air intake area 1 is provided with an airflow distribution plate, and the airflow distribution plate is provided with multiple distribution holes.

[0031] Specifically, the adsorption process of the activated carbon circulating desorption organic waste gas treatment device provided in this embodiment is as follows: the first valve 12 at the air inlet 11 and the second valve 43 at the exhaust outlet 42 are opened, and the third valve 53 at the return air outlet 51 and the fourth valve 34 at the degassing inlet 52 are closed; the air inlet 11 is connected to the gas to be treated, and the organic waste gas flow enters from the air inlet 11 and first flows through the air inlet area 1 (the airflow is evenly distributed by setting an airflow distribution plate); then it enters the photocatalytic area 2. The catalytic module 21 in the photocatalytic area 2 includes multiple UV lamps and catalyst plates, wherein the multiple UV lamps are arranged at intervals along the airflow direction, and the catalyst plates are correspondingly arranged on the UV lamps. Downstream of the airflow in the tube or between adjacent UV lamps; when the airflow passes through the catalytic module 21, the pollutants in the organic waste gas undergo an oxidation decomposition reaction under the synergistic effect of UV light radiation and the catalytic effect of the catalyst plate, transforming into small molecule harmless substances (such as H2O, CO2, etc.); the airflow after photocatalytic treatment continues to enter the adsorption zone 3, and passes through the activated carbon adsorption submodule 31 (preferably using a honeycomb activated carbon structure, relying on its high specific surface area to achieve efficient adsorption) and the additional adsorption submodule 32 in sequence, to deeply purify the residual trace pollutants, and finally flows through the exhaust zone 4 (under the power of the fan module 41), and is finally discharged from the exhaust port 42 in compliance with standards.

[0032] Over long-term use, honeycomb activated carbon will gradually reach adsorption saturation, resulting in a significant decrease in its adsorption efficiency for organic waste gases. Therefore, it is necessary to perform desorption and regeneration operations on the activated carbon module regularly.

[0033] Specifically, the desorption process of the activated carbon circulating desorption organic waste gas treatment device provided in this embodiment is as follows: the first valve 12 at the air inlet 11 and the second valve 43 at the exhaust outlet 42 are closed, and the third valve 53 at the return air outlet 51 and the fourth valve 34 at the degassing inlet 52 are opened; driven by the fan module 41 (e.g., an induced draft fan) in the exhaust area 4, the airflow starts from the exhaust area 4, passes through the return air outlet 51 and enters the return air channel 5 (flowing along the inner wall of the corrosion-resistant metal pipe to avoid chemical reaction between the airflow and the pipe), flows back to the air inlet area 1 through the degassing inlet 52, then flows through the photocatalytic area 2 (with the help of the thermal effect or catalytic action of the catalytic module 21 to assist desorption), and the adsorption area 3 (to desorb the saturated organic pollutants in the adsorption module), and finally returns to the exhaust area 4, forming a closed desorption airflow circulation path.

[0034] Furthermore, in this embodiment, the method for determining whether the activated carbon circulating desorption organic waste gas treatment device needs desorption is as follows: the gas concentration on both sides of the inlet and outlet of the activated carbon adsorption submodule 31 is monitored in real time by the gas probe 33. When the change in concentration on both sides is lower than a preset first threshold, it is determined that the activated carbon has been saturated with adsorption, and the device is started to perform desorption. The following exemplary description is given for the device to perform desorption.

[0035] For example, firstly, the first valve 12 of the gas to be treated passage and the second valve 43 of the purified gas discharge passage are closed to cut off the flow of the gas to be treated. Then, the third valve 53 and the fourth valve 34 of the desorption circulation passage are opened, so that the airflow inside the device is switched to the desorption-dedicated circulation passage. When the airflow flows through the activated carbon adsorption submodule 31 along this passage, it will purge the surface of the honeycomb activated carbon, causing the adsorbed organic matter to detach from the honeycomb activated carbon adsorption unit. The detached organic matter mixes with the airflow to form a small volume, medium-to-high concentration organic waste gas mixture. This mixture will continuously flow into the UV photocatalysis module 21 along the circulation passage and be degraded through photocatalytic reaction. After this circulation process continues for a certain period of time, the honeycomb activated carbon is gradually desorbed and regenerated.

[0036] Furthermore, after the desorption cycle has run for a preset basic time, the device enters the desorption completion determination stage. At this time, the first valve 12 is opened, and a fixed amount of waste gas to be treated is introduced as the test waste gas. At the same time, the second valve 43 is kept closed, and the third valve 53 and the fourth valve 34 are kept open to ensure that the test waste gas can flow sequentially through the UV photocatalytic module 21 and the activated carbon adsorption submodule 31 to simulate the actual adsorption conditions. Then, the concentration difference between the inlet and outlet of the activated carbon adsorption module is detected again through the gas probe 33. If the concentration difference reaches the preset second threshold, it indicates that the adsorption capacity of the honeycomb activated carbon has been restored, and the desorption is determined to be complete. At this time, the third valve 53 and the fourth valve 34 are closed, the second valve 43 is opened, and the device switches back to the normal adsorption process. If the concentration difference does not reach the second threshold, it means that the activated carbon has not been fully regenerated. The first valve 12 needs to be closed, the desorption process continues, and the desorption time is extended until the concentration difference meets the determination criteria.

[0037] The activated carbon circulating desorption organic waste gas treatment device described in this embodiment has independent valves installed at the air inlet 11, exhaust outlet 42, return air outlet 51, and degassing inlet 52. The device allows for flexible switching between adsorption and desorption modes via valve switching combinations, adapting to the waste gas treatment needs of enterprises at different times (e.g., adsorption mode during production, desorption mode during production breaks). Simultaneously, the dual adsorption module design of the adsorption zone 3 allows for flexible selection of the material types of the activated carbon adsorption submodule 31 and the additional adsorption submodule 32 based on the composition and concentration differences of the organic waste gas (e.g., using high-adsorption-capacity honeycomb activated carbon for high-concentration waste gas, and granular activated carbon for low-concentration complex waste gas), improving the device's adaptability to different operating conditions.

[0038] Specifically, the activated carbon circulating desorption organic waste gas treatment device of this utility model also includes a box 6. The box 6 has independent accommodating spaces that correspond one-to-one with the air inlet area 1, the photocatalytic area 2, the adsorption area 3, and the exhaust area 4. Each accommodating space is connected sequentially along the airflow direction in the device, forming a cavity structure that is completely adapted to the linear arrangement of the air inlet area 1, the photocatalytic area 2, the adsorption area 3, and the exhaust area 4.

[0039] Furthermore, referring to Figure 1 As shown, the housing 6 has a first opening at the air inlet of the front end of the air intake area 1 (the end away from the catalytic module 21), and a second opening at the exhaust port 42 of the rear end of the exhaust area 4 (the end away from the additional adsorption submodule 32). The inner diameters of the first and second openings are adapted to the outer diameters of the air inlet 11 and the exhaust port 42, respectively. The edges of the first and second openings are integrally formed with sealing flanges. The number and diameter of the flange holes of the sealing flanges match the flange structure of the outer periphery of the air inlet 11 and the exhaust port 42. The sealing flanges are detachably fixed to the flange structure of the air inlet and the exhaust port 42 by bolts, and an oil-resistant sealing gasket is provided at the bolt connection gap.

[0040] Furthermore, the housing 6 is also provided with two mounting holes for installing gas probes 33. These two mounting holes correspond to the gas flow spaces (first gas flow space and second gas flow space) on both sides of the activated carbon adsorption submodule 31, respectively. One mounting hole for the gas probe 33 is located above the reserved second gas flow space between the catalytic module 21 and the activated carbon adsorption submodule 31 on the housing 6; the other mounting hole for the gas probe 33 is located above the reserved first gas flow space between the activated carbon adsorption submodule 31 and the auxiliary adsorption submodule 32 on the housing 6. The detection end of the gas probe 33 extends into the containment space of the adsorption region 3 to monitor the residual gas concentration between the two gas flow spaces.

[0041] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. An activated carbon circulating desorption organic waste gas treatment device, characterized in that, include: The air intake area, photocatalytic area, adsorption area and exhaust area are connected in sequence, and the exhaust area and the air intake area are connected by a return air channel. An air inlet is provided on the side of the air intake area away from the photocatalytic area; a catalytic module is provided in the photocatalytic area; and an adsorption module is provided in the adsorption area. A fan module is provided in the exhaust area, and the fan module is located on the side close to the adsorption module; an exhaust port is provided on the side of the exhaust area away from the adsorption area. A return air inlet is provided at the connection between the return air duct and the exhaust area, and a degassing inlet is provided at the connection between the return air duct and the air intake area; wherein, valves are provided at the air intake, the exhaust outlet, the return air inlet and the degassing inlet.

2. The activated carbon circulating desorption organic waste gas treatment device according to claim 1, characterized in that, The adsorption module includes an activated carbon adsorption submodule and an additional adsorption submodule; the activated carbon adsorption submodule and the additional adsorption submodule are arranged sequentially along the airflow direction, and a first gas flow space is reserved between the activated carbon adsorption submodule and the additional adsorption submodule to allow for a smooth transition of the airflow.

3. The activated carbon circulating desorption organic waste gas treatment device according to claim 2, characterized in that, Gas probes are installed on both sides of the activated carbon adsorption submodule.

4. The activated carbon circulating desorption organic waste gas treatment device according to claim 2, characterized in that, The activated carbon adsorption submodule includes multiple honeycomb activated carbon adsorption units.

5. The activated carbon circulating desorption organic waste gas treatment device according to claim 2, characterized in that, A second gas flow space is reserved between the catalytic module and the activated carbon adsorption submodule to allow for a smooth transition of gas flow.

6. The activated carbon circulating desorption organic waste gas treatment device according to claim 1, characterized in that, A first valve is provided at the air inlet, a second valve is provided at the exhaust outlet, a third valve is provided at the return air outlet, and a fourth valve is provided at the degassing inlet; wherein, the third valve is located in the return air channel, and the fourth valve is located in the air inlet area.

7. The activated carbon circulating desorption organic waste gas treatment device according to claim 6, characterized in that, The first valve, the second valve, and the third valve are all electric air valves, and the fourth valve is a one-way check valve.

8. The activated carbon circulating desorption organic waste gas treatment device according to claim 1, characterized in that, The catalytic module includes multiple UV lamps and a catalyst plate, wherein the multiple UV lamps are arranged at intervals.

9. The activated carbon circulating desorption organic waste gas treatment device according to claim 1, characterized in that, The inner wall of the air intake area is provided with an airflow distribution plate, and the airflow distribution plate has multiple distribution holes.

10. The activated carbon circulating desorption organic waste gas treatment device according to claim 1, characterized in that, It also includes a housing, which is provided with a first opening and a second opening; the inner diameters of the first opening and the second opening are respectively adapted to the outer diameters of the air inlet and the exhaust port.

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