VOCs waste gas treatment device for lithium battery workshop

Abstract

The utility model discloses a VOCs waste gas treatment device for a lithium battery workshop, which belongs to the technical field of waste gas adsorption and comprises a waste gas input component, a waste gas adsorption component and a waste gas reaction component, the waste gas input component comprises a main air supply pipe and a regeneration air pipe, the input end of the regeneration air pipe is connected with the main air supply pipe, and the output end of the regeneration air pipe is connected with the waste gas adsorption component. The output ends of the main air supply pipe and the regeneration air pipe are converged and are connected with the waste gas adsorption component; under the adsorption working condition, waste gas is sequentially conveyed to the waste gas adsorption component and the waste gas reaction component through the main blast pipe to be adsorbed and purified and then discharged; under the desorption working condition, waste gas is desorbed by the waste gas adsorption component through the regeneration air pipe and then is fed into the waste gas reaction component for combustion and heat exchange. A regeneration gas source comes from the waste gas, so that the temperature and the humidity in the waste gas purification process can be ensured, and the regeneration heat utilization efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas adsorption, and in particular to a VOCs waste gas treatment device used in a lithium battery workshop. Background Art

[0002] Volatile organic compounds (VOCs) refer to volatile organic compounds with a saturated vapor pressure of more than 70.91 Pa at room temperature and a boiling point of 50-260°C at normal pressure. There are many types of VOCs, including aromatic hydrocarbons, aliphatic hydrocarbons, halogenated hydrocarbons, aldehydes, alcohols, esters, ethers, and tetrahydrofuran. Industrial sources are the main source of VOCs emissions, involving a wide range of industries, including the lithium battery industry.

[0003] Strict environmental temperature and humidity control is implemented in lithium battery production workshops, and the production waste gas generated under this environmental background has a low dew point. During the production process of lithium batteries, electrolyte volatilization will form waste gas in the injection workshop and the high-temperature formation workshop. The VOCs concentration in this part of the waste gas is low, but the discharge volume is large. The adsorption method is usually used to treat VOCs. For example, the Chinese patent document with the announcement number CN209501346U discloses a special device for the continuous removal process of waste gas VOCs. The waste gas VOCs are continuously removed by adsorption and electrocatalysis. The integration of activated carbon adsorption, degradation and regeneration can be achieved. However, the use of a gas purge device in the adsorption process will introduce new outside air. Traditional equipment similar to the gas purge device introduces outside air to regenerate fresh air, but the outside air has a certain humidity and the utilization rate of regeneration heat is low. Utility Model Content

[0004] The utility model aims to provide a VOCs waste gas treatment device for a lithium battery workshop, so as to solve the problem that the traditional equipment in the prior art adopts fresh air regeneration, which will introduce external humid air and has a low regeneration heat utilization rate.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a VOCs waste gas treatment device for a lithium battery workshop, comprising a waste gas input component, a waste gas adsorption component and a waste gas reaction component, the waste gas input component comprising a main air supply duct and a regeneration air duct, the input end of the regeneration air duct is connected to the main air supply duct, the output ends of the main air supply duct and the regeneration air duct are converged and connected to the waste gas adsorption component; under adsorption conditions, the waste gas is transported by the main air supply duct in sequence to the waste gas adsorption component and the waste gas reaction component for adsorption and purification and then discharged; under desorption conditions, the waste gas is sent from the regeneration air duct to the waste gas reaction component for combustion and heat exchange after desorption via the waste gas adsorption component.

[0006] Furthermore, the output end of the main air supply duct and the output end of the regeneration air duct are connected to the exhaust gas adsorption component through a common air duct, and the output ends of the main air supply duct and the regeneration air duct are respectively provided with a first electric regulating valve and a second electric regulating valve, and the first electric regulating valve and the second electric regulating valve respectively control the opening and closing of the output ends of the main air supply duct and the regeneration air duct.

[0007] Furthermore, the main air supply duct is connected to the induced draft fan, the regeneration air duct is connected to the regeneration fan and the regeneration air heater, the induced draft fan and the regeneration fan are both used to provide power for the exhaust gas, and the regeneration air heater is used to heat the exhaust gas.

[0008] Furthermore, the exhaust gas adsorption component includes an air distribution chamber and an activated carbon adsorption chamber, the air distribution chamber is connected to a common air duct, and the air distribution chamber distributes the exhaust gas into the activated carbon adsorption chamber.

[0009] Furthermore, an air distribution hole plate is arranged on the top of the air distribution chamber, and a diffusion gap is left between the air distribution hole plate and the activated carbon adsorption chamber.

[0010] Furthermore, the exhaust gas reaction component includes a catalytic combustion chamber, one end of the catalytic combustion chamber is connected to the activated carbon adsorption chamber, and the other end of the catalytic combustion chamber is connected to the gas collecting chamber.

[0011] Furthermore, a high-temperature flue gas heat exchange chamber is provided between the activated carbon adsorption chamber and the catalytic combustion chamber, and the high-temperature flue gas heat exchange chamber receives the high-temperature flue gas collected by the gas collecting chamber through a flue gas conveying pipe.

[0012] Furthermore, the high-temperature flue gas heat exchange chamber is provided with a desorption liquid dynamic flap door and an adsorption liquid dynamic flap door. The desorption liquid dynamic flap door controls the connection between the gas collecting chamber and the flue gas conveying pipe, and the adsorption liquid dynamic flap door controls the connection between the gas collecting chamber and the purified waste gas exhaust pipe.

[0013] Furthermore, a dehumidifier and a workshop return air device are connected downstream of the purified waste gas exhaust pipe, and the dehumidifier and the workshop return air device return the purified waste gas to the workshop after treatment.

[0014] Furthermore, the high-temperature flue gas heat exchange chamber is connected to a flue gas exhaust duct, and the downstream of the flue gas exhaust duct is connected to a discharge chimney.

[0015] Furthermore, it also includes a condensate drainage system, which is arranged at the lowest position at the bottom of the smoke exhaust duct.

[0016] Furthermore, the condensate drainage system includes a condensate collecting trough, a condensate drainage pipe and a water seal replenishment pipe. The condensate collecting trough is connected to the flue gas exhaust pipe, the condensate drainage pipe is connected to the bottom of the condensate collecting trough, and the water seal replenishment pipe is connected to the condensate drainage pipe.

[0017] Furthermore, it also includes a fire protection system, which includes a temperature sensor. The temperature sensor is arranged on the smoke exhaust pipe and is used to detect the smoke temperature.

[0018] Compared with the existing known technologies, the technical solution provided by the utility model has the following beneficial effects:

[0019] The utility model discloses a VOCs waste gas treatment device for lithium battery workshops. Under adsorption conditions, waste gas can be discharged after being purified through waste gas adsorption components and adsorption reaction components, thereby reducing environmental pollution. Under desorption conditions, waste gas passes through a regeneration air duct to form a regeneration gas source, which is then desorbed by a desorption component and then sent to a waste gas reaction component for combustion and heat exchange. The regeneration gas source comes from the waste gas itself, and no outside air is introduced into the system, thereby ensuring the temperature and humidity during the waste gas purification process. Moreover, the waste gas combustion heat exchange after desorption has a high regeneration heat utilization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In the drawings, the sizes and proportions do not represent the sizes and proportions of actual products. The drawings are merely illustrative, and some non-essential elements or features are omitted for clarity.

[0021] Figure 1 It is a structural schematic diagram of a VOCs waste gas treatment device according to an embodiment of the utility model;

[0022] Figure 2 This is a schematic diagram of the exhaust gas operation path of the VOCs exhaust gas treatment device under adsorption conditions according to an embodiment of the utility model;

[0023] Figure 3 It is a schematic diagram of the exhaust gas operation path of the VOCs exhaust gas treatment device under desorption conditions in an embodiment of the utility model.

[0024] Explanation of the symbols in the schematic diagram:

[0025] 1. Main air supply duct; 2. Regeneration air duct; 3. induced draft fan; 4. Regeneration fan; 5. Regeneration air heater; 601. First electric regulating valve; 602. Second electric regulating valve; 7. Public air duct; 8. Air distribution chamber; 9. Activated carbon adsorption chamber; 10. High-temperature flue gas heat exchange chamber; 11. Catalytic combustion chamber; 12. Gas collecting chamber; 1301. Desorption liquid dynamic flap door; 1302. Adsorption liquid dynamic flap door; 14. Purified waste gas exhaust duct; 1501. Flue gas exhaust duct; 1502. Flue gas delivery pipe; 16. Temperature sensor; 17. Open sprinkler nozzle; 1801. Condensate collecting tank; 1802. Condensate drain pipe; 1803. Water seal water supply pipe; 19. Fire water pipe; 20. Equipment shell. DETAILED DESCRIPTION

[0026] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the accompanying drawings and embodiments. What is described here is only the preferred embodiment of the utility model. Those skilled in the art can think of other ways to implement the utility model based on the preferred embodiment, and other ways also fall within the scope of the utility model.

[0027] Example

[0028] Reference Figure 1-Figure 3 , this embodiment provides a VOCs waste gas treatment device for a lithium battery workshop, including a waste gas input component, a waste gas adsorption component and a waste gas reaction component, the waste gas input component includes a main air supply pipe 1 and a regeneration air pipe 2, the input end of the regeneration air pipe 2 is connected to the main air supply pipe 1, and the output ends of the main air supply pipe 1 and the regeneration air pipe 2 are collected and connected to the waste gas adsorption component; under the adsorption condition, the waste gas is transported from the main air supply pipe 1 to the waste gas adsorption component and the waste gas reaction component in sequence for adsorption and purification, and then discharged to reduce environmental pollution. Under the desorption condition, the waste gas forms a regeneration gas source from the regeneration air pipe 2, and the regeneration gas source is sent to the waste gas reaction component for combustion and heat exchange after desorption by the waste gas adsorption component. The regeneration gas source comes from the waste gas itself, and no outside air is introduced into the system to ensure the temperature and humidity during the waste gas purification process, and the waste gas combustion heat exchange after desorption has a high regeneration heat utilization efficiency.

[0029] Specifically, Figure 1 As shown, the output end of the main air supply pipe 1 and the output end of the regeneration air pipe 2 are connected to the exhaust gas adsorption component through the common air pipe 7. The output ends of the main air supply pipe 1 and the regeneration air pipe 2 are respectively provided with a first electric regulating valve 601 and a second electric regulating valve 602, which respectively control the opening and closing of the output ends of the main air supply pipe 1 and the regeneration air pipe 2. The main air supply pipe 1 is connected to the induced draft fan 3, and the regeneration air pipe 2 is connected to the regeneration fan 4 and the regeneration air heater 5. The induced draft fan 3 and the regeneration fan 4 are both used to provide power for the exhaust gas, and the regeneration air heater 5 is used to heat the exhaust gas.

[0030] It should be noted that the regeneration air duct 2 does not bear the air volume under the adsorption condition, and the main air supply duct 1 draws air only under the desorption condition. Only the induced draft fan 3 is started under the adsorption condition, and only the regeneration fan 4 is started under the desorption condition. The flow rate of the regeneration fan 4 is about one-third of the flow rate of the induced draft fan 3. In addition to the necessary pressure loss and surplus pressure in the equipment, the head of the regeneration fan 4 also needs to consider the situation where the terminal discharge point is connected to the high-altitude chimney. The regeneration air heater 5 adopts the form of electric heating. The regeneration air heater 5 is only started under the desorption condition. In the early stage, it provides the initial reaction temperature for the regenerated exhaust gas, and in the later stage, it supplements the difference between the temperature required for the regeneration air reaction and the temperature obtained by the exhaust gas heat recovery to maintain the reaction.

[0031] In this embodiment, please continue to refer to Figure 1The exhaust gas adsorption component includes an air distribution chamber 8 and an activated carbon adsorption chamber 9. The air distribution chamber 8 is connected to the common air duct 7. The air distribution chamber 8 distributes the exhaust gas into the activated carbon adsorption chamber 9. The opening and closing of the first electric regulating valve 601 and the second electric regulating valve 602 are switched according to the working conditions of the equipment. Figure 2 and Figure 3 During the adsorption operation, the first electric regulating valve 601 on the main air supply duct 1 is opened, the second electric regulating valve 602 on the regeneration air duct 2 is closed, and the exhaust gas is transported to the air distribution chamber 8 by the induced draft fan 3; during the desorption operation, the first electric regulating valve 601 on the main air supply duct 1 is closed, the second electric regulating valve 602 on the regeneration air duct 2 is opened, and the exhaust gas is transported to the air distribution chamber 8 after being heated by the regeneration air heater 5 by the regeneration fan 4.

[0032] Furthermore, an air distribution plate is provided on the top of the air distribution chamber 8, and the aperture of the air distribution hole is determined based on the calculation of the exhaust gas volume. A diffusion interval is left between the air distribution plate and the activated carbon adsorption chamber 9 to provide a certain diffusion space for the exhaust gas, which is conducive to the uniform exhaust gas concentration and temperature in the air distribution chamber 8. The spacing of the diffusion interval is preferably 10 cm in this embodiment. The activated carbon adsorption chamber 9 uses a square honeycomb activated carbon block as filler, and the equipment housing 20 corresponding to the activated carbon adsorption chamber 9 can be opened to replace the activated carbon block. The activated carbon block is placed on the activated carbon rack in the adsorption chamber, and the activated carbon rack is connected by a slide rail. When replacing the activated carbon block, the activated carbon rack is pulled out of the equipment box by the slide rail for replacement. Under adsorption conditions, the exhaust gas passes through the activated carbon adsorption chamber 9, and the VOCs in the exhaust gas are adsorbed by the honeycomb activated carbon block, thereby obtaining purified exhaust gas. Under desorption conditions, high-temperature exhaust gas enters the activated carbon adsorption chamber 9, and the high temperature causes the VOCs adsorbed in the honeycomb activated carbon block to be released, forming high-temperature concentrated exhaust gas. When the activated carbon block reaches the upper limit of its service life or its adsorption capacity cannot meet the usage requirements, replace the activated carbon block.

[0033] Please continue to refer to Figure 1 In this embodiment, the exhaust gas reaction component includes a catalytic combustion chamber 11, one end of the catalytic combustion chamber 11 is connected to the activated carbon adsorption chamber 9, and the other end is connected to the gas collecting chamber 12. The catalytic combustion chamber 11 uses a square ceramic skeleton precious metal catalyst filler. The equipment housing 20 corresponding to the catalytic combustion chamber 11 can be opened to replace the catalyst block. The installation and replacement mode of the catalyst block are the same as the activated carbon block mentioned above. Under the adsorption condition, the purified exhaust gas adsorbed by the activated carbon passes through the catalytic combustion chamber 11, and the exhaust gas temperature fails to reach the temperature required for the reaction, and the exhaust gas will not undergo a decomposition reaction. Under the desorption condition, the high-temperature concentrated exhaust gas enters the catalytic combustion chamber 11. Under the action of high temperature and catalyst, the high-temperature concentrated exhaust gas decomposes to generate water, carbon dioxide and other inorganic substances and releases a large amount of heat to form high-temperature flue gas. When the catalyst block reaches the upper limit of the service life or the catalytic capacity cannot meet the use requirements, the catalyst replacement process is executed.

[0034] To improve the thermal efficiency of the exhaust gas treatment device, please continue to refer to Figure 1 A high-temperature flue gas heat exchange chamber 10 is arranged between the activated carbon adsorption chamber 9 and the catalytic combustion chamber 11. The high-temperature flue gas heat exchange chamber 10 receives the high-temperature flue gas collected by the gas collection chamber 12 through the flue gas conveying pipe 1502. The temperature of the high-temperature flue gas is 450-600°C. The high-temperature flue gas heat exchange chamber 10 is composed of finned heat exchange tubes, and the spacing between the outer contours of the finned heat exchange tubes is about 2 cm. Under adsorption conditions, the high-temperature flue gas heat exchange chamber 10 does not participate in the operation, and the exhaust gas enters the catalytic combustion chamber 11 through the gaps between the heat exchange tubes. Under desorption conditions, the high-temperature flue gas is collected by the gas collection chamber 12 and enters the inside of the finned heat exchange tube. The high-temperature concentrated exhaust gas is outside the finned heat exchange tube, and the waste heat in the high-temperature flue gas in the heat exchange tube is fully utilized for heat exchange. The high-temperature flue gas heat exchange chamber 10 is externally connected to the flue gas exhaust pipe 1501, and the downstream of the flue gas exhaust pipe 1501 is connected to the discharge chimney. The high-temperature concentrated exhaust gas enters the catalytic combustion chamber 11, and the high-temperature flue gas after heat exchange is discharged to the flue gas exhaust pipe 1501. The finned heat exchange tube is installed with a slope of 1% downward toward the flue gas exhaust pipe 1501, and the so-called 1% slope is 1m for every 100m straight length.

[0035] The high-temperature flue gas heat exchange chamber 10 is provided with a desorption liquid dynamic flap door 1301 and an adsorption liquid dynamic flap door 1302. The desorption liquid dynamic flap door 1301 controls the connection between the gas collection chamber 12 and the flue gas delivery pipe 1502, and the adsorption liquid dynamic flap door 1302 controls the connection between the gas collection chamber 12 and the purified waste gas exhaust pipe 14. It should be noted that the hydraulic flap door is controlled to open and close by a hydraulic rod, and the hydraulic rod adopts an electric hydraulic rod. Under the adsorption condition, the adsorption liquid dynamic flap door 1302 is opened, the desorption liquid dynamic flap door 1301 is closed, and the purified waste gas enters the purified waste gas exhaust pipe 14 from the gas collection chamber 12; under the desorption condition, the adsorption liquid dynamic flap door 1302 is closed, the desorption liquid dynamic flap door 1301 is opened, and the high-temperature flue gas enters the fin heat exchange tube in the high-temperature flue gas heat exchange chamber 10 from the gas collection chamber 12, and enters the flue gas exhaust pipe 1501 after heat exchange. Furthermore, the purified waste gas exhaust duct 14 is used to receive the purified waste gas generated by the adsorption treatment of the equipment. The purified waste gas is discharged from the purified waste gas exhaust duct 14 to the downstream dehumidifier, and is returned to the workshop after being dehumidified together with the workshop return air.

[0036] During the high-temperature flue gas heat exchange cooling process, the generated condensed water needs to be collected and discharged. Please continue to refer to Figure 1The present embodiment designs a condensate drainage system, which is arranged at the lowest position at the bottom of the flue gas exhaust pipe 1501. The condensate drainage system consists of a condensate collection tank 1801, a condensate drainage pipe 1802 and a water seal water supply pipe 1803. The condensate collection tank 1801 is connected to the flue gas exhaust pipe 1501, the condensate drainage pipe 1802 is connected to the bottom of the condensate collection tank 1801, and the water seal water supply pipe 1803 is connected to the condensate drainage pipe 1802. The condensate drainage pipe 1802 should be a drainage pipe with a water seal to prevent the flue gas from being discharged directly from the condensate drainage pipe 1802. The water seal water supply pipe 1803 is made of a transparent material to facilitate observation of the water level and prevent damage to the water seal.

[0037] Considering the high temperature during catalytic combustion, in order to ensure the safety of the equipment, this embodiment also provides a fire protection system, which works in conjunction with the exhaust gas input component to cool the equipment. Figure 1 As shown, the fire protection system includes a temperature sensor 16, an open sprinkler 17, a fire hose 19 and an alarm system. The temperature sensor 16 is arranged on the smoke exhaust pipe 1501 between the high-temperature smoke heat exchange chamber 10 and the gas collecting chamber 12 to detect the smoke temperature. The obtained data is fed back to the central control system for adjusting the heating temperature of the desorption electric heater and triggering the fire alarm system. The open sprinkler 17 is located at the top outside the equipment. When the temperature sensor 16 senses that the alarm temperature is exceeded, an accident alarm is issued to the staff or the central control room. After confirmation by the staff, the fire protection condition is entered. The second electric regulating valve 602, the regeneration fan 4, the regeneration air heater 5, and the adsorption liquid dynamic flap door 1302 are closed, and the first electric regulating valve 601, the induced draft fan 3, and the desorption liquid dynamic flap door 1301 are opened to increase the machine exhaust and cool down the inside of the equipment. If an open fire has been generated, the whole equipment is powered off, the open sprinkler 17 is started, and water is sprayed to cool down.

[0038] In addition to the above-mentioned fire-fighting working conditions, this embodiment mainly has two working conditions: adsorption working condition and desorption working condition. The specific working conditions are as follows:

[0039] In the adsorption condition, the second electric regulating valve 602, the regeneration fan 4, the regeneration air heater 5, and the desorption liquid dynamic flap door 1301 are closed, and the first electric regulating valve 601, the induced draft fan 3, and the adsorption liquid dynamic flap door 1302 are opened. The exhaust gas flows evenly from the air distribution chamber 8 to the activated carbon adsorption chamber 9 through the induced draft fan 3, and the VOCs in the exhaust gas are adsorbed by the activated carbon. The exhaust gas enters the gas collection chamber 12 through the high-temperature flue gas heat exchange chamber 10 and the catalytic combustion chamber 11, and is discharged through the purified exhaust gas exhaust pipe 14.

[0040] During the desorption operation, the second electric regulating valve 602, the regeneration fan 4, the regeneration air heater 5, and the desorption liquid dynamic flap door 1301 are opened, and the first electric regulating valve 601, the induced draft fan 3, and the adsorption liquid dynamic flap door 1302 are closed. The exhaust gas is introduced into the system through the regeneration fan 4, and after being heated by the regeneration air heater 5, it flows evenly from the air distribution chamber 8 to the activated carbon adsorption chamber 9. The high-temperature exhaust gas desorbs the VOCs in the activated carbon adsorption unit to form high-temperature concentrated exhaust gas. The high-temperature concentrated exhaust gas enters the catalytic combustion chamber 11, triggering a decomposition reaction. The VOCs are decomposed into CO2, H2O and other inorganic substances and release heat. The high-temperature flue gas enters the high-temperature flue gas heat exchange chamber 10 through the gas collection chamber 12 to exchange heat with the newly entered high-temperature concentrated exhaust gas, making full use of the flue gas heat and reducing the energy consumption of the front-end regeneration air heater 5. The flue gas is discharged from the chimney after heat exchange.

[0041] In the description of the present invention, it should be noted that the terms "center", "middle", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0042] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A VOCs waste gas treatment device for a lithium battery workshop, characterized in that: The invention comprises a waste gas input component, a waste gas adsorption component and a waste gas reaction component, wherein the waste gas input component comprises a main air supply pipe (1) and a regeneration air pipe (2), wherein the input end of the regeneration air pipe (2) is connected to the main air supply pipe (1), and the output ends of the main air supply pipe (1) and the regeneration air pipe (2) are combined and connected to the waste gas adsorption component; under adsorption conditions, the waste gas is sequentially transported from the main air supply pipe (1) to the waste gas adsorption component and the waste gas reaction component for adsorption and purification, and then discharged; under desorption conditions, the waste gas is transported from the regeneration air pipe (2) to the waste gas adsorption component for desorption, and then transported to the waste gas reaction component for combustion and heat exchange.

2. A VOCs waste gas treatment device for a lithium battery workshop according to claim 1, characterized in that: The output end of the main air supply pipe (1) and the output end of the regeneration air pipe (2) are both connected to the exhaust gas adsorption component via a common air pipe (7); the output ends of the main air supply pipe (1) and the regeneration air pipe (2) are respectively provided with a first electric regulating valve (601) and a second electric regulating valve (602); the first electric regulating valve (601) and the second electric regulating valve (602) respectively control the opening and closing of the output ends of the main air supply pipe (1) and the regeneration air pipe (2).

3. A VOCs waste gas treatment device for a lithium battery workshop according to claim 2, characterized in that: The main air supply duct (1) is connected to the induced draft fan (3), and the regeneration air duct (2) is connected to the regeneration fan (4) and the regeneration air heater (5).

4. A VOCs waste gas treatment device for a lithium battery workshop according to claim 2, characterized in that: The exhaust gas adsorption component comprises an air distribution chamber (8) and an activated carbon adsorption chamber (9), and the air distribution chamber (8) is connected to a common air duct (7).

5. A VOCs waste gas treatment device for a lithium battery workshop according to claim 4, characterized in that: An air distribution hole plate is arranged on the top of the air distribution chamber (8), and a diffusion gap is left between the air distribution hole plate and the activated carbon adsorption chamber (9).

6. A VOCs waste gas treatment device for a lithium battery workshop according to claim 4, characterized in that: The exhaust gas reaction component comprises a catalytic combustion chamber (11), one end of the catalytic combustion chamber (11) is connected to the activated carbon adsorption chamber (9), and the other end of the catalytic combustion chamber (11) is connected to the gas collection chamber (12).

7. A VOCs waste gas treatment device for a lithium battery workshop according to claim 6, characterized in that: A high-temperature flue gas heat exchange chamber (10) is provided between the activated carbon adsorption chamber (9) and the catalytic combustion chamber (11), and the high-temperature flue gas heat exchange chamber (10) receives the high-temperature flue gas collected by the gas collecting chamber (12) through the flue gas conveying pipe (1502).

8. A VOCs waste gas treatment device for a lithium battery workshop according to claim 7, characterized in that: The high-temperature flue gas heat exchange chamber (10) is provided with a desorption liquid dynamic flap door (1301) and an adsorption liquid dynamic flap door (1302), wherein the desorption liquid dynamic flap door (1301) controls the connection between the gas collecting chamber (12) and the flue gas conveying pipe (1502), and the adsorption liquid dynamic flap door (1302) controls the connection between the gas collecting chamber (12) and the purified waste gas exhaust pipe (14).

9. A VOCs waste gas treatment device for a lithium battery workshop according to claim 8, characterized in that: The downstream of the purified waste gas exhaust pipe (14) is connected to a dehumidifier and a workshop return air device, and the dehumidifier and the workshop return air device return the purified waste gas to the workshop after processing.

10. A VOCs waste gas treatment device for a lithium battery workshop according to claim 7, characterized in that: The high-temperature flue gas heat exchange chamber (10) is externally connected to a flue gas exhaust pipe (1501), and the downstream of the flue gas exhaust pipe (1501) is connected to a discharge chimney.

11. A VOCs waste gas treatment device for a lithium battery workshop according to claim 10, characterized in that: It also includes a condensate drainage system, which is arranged at the lowest position at the bottom of the smoke exhaust duct (1501).

12. A VOCs waste gas treatment device for a lithium battery workshop according to claim 11, characterized in that: The condensate drainage system includes a condensate collecting trough (1801), a condensate drainage pipe (1802) and a water seal replenishment pipe (1803); the condensate collecting trough (1801) is connected to the flue gas exhaust pipe (1501); the condensate drainage pipe (1802) is connected to the bottom of the condensate collecting trough (1801); and the water seal replenishment pipe (1803) is connected to the condensate drainage pipe (1802).

13. A VOCs waste gas treatment device for a lithium battery workshop according to claim 10, characterized in that: It also includes a fire protection system, which includes a temperature sensor (16). The temperature sensor (16) is arranged on the smoke exhaust pipe (1501) and is used to detect the smoke temperature.

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