A lithium battery production waste gas treatment and recovery device

Abstract

The application discloses a lithium battery production waste gas treatment and recovery device and relates to the technical field of waste gas treatment and recovery.The device comprises a support and a pretreatment mechanism, the pretreatment mechanism is arranged on the top of the support, the pretreatment mechanism comprises a pretreatment barrel, two heating modules are arranged on the inner side of the pretreatment barrel, a cooling module is arranged on the outer side of the pretreatment barrel, a sealing cover is arranged on the top of the pretreatment barrel, a spraying module is arranged on the top of the sealing cover, the bottom output end of the spraying module penetrates through the sealing cover and is connected with a shower head, a humidity sensor is arranged on the inner side of the pretreatment barrel, the humidity sensor detects the humidity of waste gas, the spraying module supplements water vapor, the concentration is prevented from being too high to cause the overload of a condensation system, the subsequent process conditions are ensured to be reasonable, the waste gas state is maintained, and the situation that impurities and concentration in waste gas are not uniform due to different production processes is avoided.

Description

Technical Field

[0001] This invention relates to the field of waste gas treatment and recovery technology, specifically to a device for treating and recovering waste gas from lithium battery production. Background Technology

[0002] Lithium-ion batteries are a type of rechargeable battery that uses lithium metal or lithium ions as the core electrochemical active material. Their basic structure includes a positive electrode, a negative electrode, an electrolyte, a separator, and a casing. They have advantages such as high energy density, long cycle life, low self-discharge rate, and no memory effect. They are widely used in consumer electronics, new energy vehicles, energy storage systems, and other fields, and are the core energy components of modern portable electronic devices and electric transportation.

[0003] The lithium battery production waste gas treatment and recovery device is an integrated environmental protection equipment designed to address the emissions of NMP solvent, acidic gases, heavy metal dust, and small amounts of harmful organic matter from processes such as coating, drying, and electrolyte injection in lithium battery production. The core process follows a "pretreatment → core recovery → deep purification → auxiliary support" workflow to achieve pollutant removal and resource recycling. This device can recover over 80 tons of NMP annually and reduce VOC emission concentration to below 5 mg / m³, balancing environmental compliance with cost reduction and efficiency improvement. It is an essential core piece of environmental protection and resource recycling equipment for lithium battery companies.

[0004] However, the existing lithium battery production waste gas treatment and recycling device has the following shortcomings: Currently available lithium battery production waste gas treatment and recycling devices employ diverse and targeted methods to precisely treat waste gases of different components and concentrations during treatment and recycling. This enables real-time control of waste gas parameters and safe and stable equipment operation, ensuring that the devices achieve both environmental compliance and resource recycling goals during the treatment and recycling process. However, before treatment, the waste gas often undergoes changes in its state due to uncertainties during transportation. Furthermore, the impurities and concentrations within the waste gas are often inconsistent due to different production processes and technologies, making it impossible to process it using standardized waste gas treatment and recycling devices.

[0005] Therefore, we propose a lithium battery production waste gas treatment and recycling device to solve the problems mentioned above. Summary of the Invention

[0006] The purpose of this invention is to provide a lithium battery production waste gas treatment and recovery device. Before being uniformly discharged, the lithium battery production waste gas enters a pretreatment tank through an inlet and an optimized process is initiated. A temperature sensor identifies temperature fluctuations after the high-concentration NMP coating waste gas and the low-temperature HF-containing waste gas from liquid injection are mixed. A heating / cooling module stabilizes the temperature within a set range, preventing premature condensation and adhesion of NMP to the pipe walls and low-temperature corrosion of equipment by acidic gases. A fan plate moves synchronously and rapidly to achieve uniform temperature mixing of the waste gas. A humidity sensor detects humidity, and a spray module replenishes water vapor to prevent excessive concentration from overloading the condensation system, ensuring reasonable operating conditions for subsequent processes. This maintains the waste gas condition and avoids inconsistencies in impurities and concentrations caused by differences in production processes and techniques. A graded, high-efficiency dust removal and impurity cleaning system is implemented. The rotating fan plate drives the electromagnetic adsorption mesh to rotate, and the electromagnetic adsorption mesh... Magnetic metal dust mixed in during the high-frequency electromagnetic pulse adsorption welding process is de-energized after batch processing, causing the dust to fall to the bottom chute. The ultrasonic transducer shakes the fine metal particles deposited in the chute to the slag outlet and discharges them to an external collection device. Unadsorbed particles are trapped by the filter screen as the waste gas flows through it. The motor module drives the conveyor auger to rotate via the second transmission belt and the second pulley. The auger scrapes the surface of the filter screen and sends the impurities to the chute, where they can be discharged together with the metal particles or discharged separately. The air pump provides negative pressure to the suction tank through the air pipe, sucking out deep impurities from the filter screen to the filter head through the suction holes and slag holes. After batch processing, the opening and closing plate module opens to discharge the impurities in the filter head. This pretreatment reduces the difficulty of subsequent recycling and improves work efficiency and quality, facilitating subsequent processing according to a unified standard for waste gas treatment and recycling devices.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a lithium battery production waste gas treatment and recycling device, comprising a support and a pretreatment mechanism, wherein the pretreatment mechanism is disposed on the top of the support; The pretreatment mechanism includes a pretreatment tank, with two heating modules installed inside the pretreatment tank and a cooling module installed outside the pretreatment tank. A sealing cover is installed on the top of the pretreatment tank, and a spray module is installed on the top of the sealing cover. The bottom output end of the spray module passes through the sealing cover and is connected to a spray head. A humidity sensor and a temperature sensor are installed inside the pretreatment tank.

[0008] Preferably, a wind plate is rotatably connected to the inner side of the pretreatment barrel, a stepper motor is installed on the outer side of the pretreatment barrel, one end of the wind plate passes through the pretreatment barrel and is installed outside the output end of the stepper motor, and an electromagnetic adsorption mesh is sleeved on the outer side of the wind plate.

[0009] Preferably, a slide is installed on the inner side of the pretreatment tank, the slide is located at the bottom of the air plate, and multiple fixing plates are installed on both sides of the slide, with multiple filter screens installed on the inner side of the multiple fixing plates.

[0010] Preferably, the top of the slide is provided with two air suction grooves, the inner side of the air suction grooves is provided with multiple rotating ports, the inner side of each of the multiple rotating ports is rotatably connected to a conveying auger, and the outer side of the conveying auger is provided with multiple slag suction holes.

[0011] Preferably, the other end of the plurality of slag suction holes is located inside the conveying auger, and an air suction hole is provided on the outer side of the conveying auger. The other end of the air suction hole is connected to the plurality of slag suction holes, and the air suction hole is located inside the air suction groove.

[0012] Preferably, one end of each of the multiple transport augers passes through the rotating opening and is fitted with a first pulley. A first transmission belt is fitted around the outside of the multiple first pulleys. A multiple limiting wheels are provided on the top of the first transmission belt. The multiple limiting wheels are respectively located between the multiple first pulleys. The multiple limiting wheels are respectively installed on the top of the fixed plate.

[0013] Preferably, a second pulley is installed on the outer side of each of the two transport augers on one side, a second transmission belt is sleeved on the outer side of the second pulley, and a third pulley is sleeved on the inner side of the other end of the second transmission belt. Two motor modules are installed on the outer side of the pretreatment barrel, and the third pulley is located on the outer side of the output end of the motor module.

[0014] Preferably, a filter head is connected to one end of the air intake groove, and an opening and closing plate module is installed at the bottom of the filter head.

[0015] Preferably, an air suction pipe is connected to the outer side of the filter head, one end of the air suction pipe passes through the pretreatment tank and is connected to an air suction pump, an outlet is connected to the outer side of the pretreatment tank, the inner end of the outlet passes through the pretreatment tank and is connected to a slide, and the air suction pump is installed at the top of the outlet.

[0016] Preferably, the pretreatment barrel has an air inlet connected to its outer side, an air outlet connected to its outer bottom, and multiple ultrasonic transducers installed at the bottom of the slide.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. Before the unified discharge and treatment of waste gas from lithium battery production, the waste gas is first discharged into a pretreatment tank through an inlet. The pretreatment tank starts an optimized process. A temperature sensor identifies the temperature fluctuations after the high-concentration NMP waste gas from the coating process and the low-temperature HF-containing waste gas from the liquid injection process are mixed. The temperature of the waste gas is stabilized within a set range by a heating module and a cooling module, which prevents NMP from prematurely condensing and adhering to the pipe wall and acidic gases from corroding the equipment at low temperatures. The fan plate moves synchronously and quickly to make the waste gas temperature uniformly blend. A humidity sensor detects the humidity of the waste gas, and a spray module replenishes water vapor to prevent the condensation system from overloading due to excessive concentration. This ensures reasonable operating conditions for subsequent processes, thereby maintaining the waste gas state and avoiding inconsistent impurities and concentrations in the waste gas when the production process and technology are different.

[0018] 2. In this invention, the rotating fan plate drives the electromagnetic adsorption mesh to rotate. The electromagnetic adsorption mesh uses high-frequency electromagnetic pulses to adsorb magnetic metal dust mixed in during the welding process. After the batch operation is completed, the power is cut off, and the dust falls to the bottom chute. The ultrasonic transducer vibrates and shakes the fine metal particles deposited in the chute to the slag outlet, which is then discharged to an external collection device. The particles that are not adsorbed flow through the filter screen with the exhaust gas. The impurity particles are trapped by the filter screen. The motor module drives the conveyor auger to rotate through the second transmission belt and the second pulley. The auger scrapes the surface of the filter screen and sends the impurities to the chute, where they can be discharged together with the metal particles or discharged separately. The air pump provides negative pressure to the suction tank through the air pipe, and sucks out the deep impurities of the filter screen to the filter head through the suction hole and slag suction hole. After the batch operation is completed, the opening and closing plate module opens to discharge the impurities in the filter head. This pretreatment can reduce the difficulty of subsequent recycling and improve work efficiency and quality, thereby facilitating the processing of the waste gas according to a unified standard waste gas treatment and recycling device. Attached Figure Description

[0019] Figure 1 This is a perspective view of the main structure of a lithium battery production waste gas treatment and recycling device according to the present invention; Figure 2 This is a three-dimensional structural view of a lithium battery production waste gas treatment and recycling device according to the present invention. Figure 3 This is a split perspective view of the pretreatment mechanism in a lithium battery production waste gas treatment and recycling device of the present invention. Figure 4 This is a partial three-dimensional view of the pretreatment mechanism in a lithium battery production waste gas treatment and recycling device of the present invention. Figure 5 This is a split perspective view of another part of the pretreatment mechanism in a lithium battery production waste gas treatment and recycling device of the present invention. Figure 6 for Figure 5 Enlarged view of point A in the middle; Figure 7 for Figure 5 Enlarged view of point B in the middle.

[0020] In the diagram: 1. Support; 2. Pretreatment mechanism; 201. Pretreatment tank; 202. Heating module; 203. Cooling module; 204. Sealing cover; 205. Spray module; 206. Spray head; 207. Humidity sensor; 208. Temperature sensor; 209. Air inlet; 210. Air outlet; 211. Motor module; 212. Fan plate; 213. Stepper motor; 214. Electromagnetic adsorption mesh; 215. Slide rail; 216. Fixing plate; 21 7. Filter screen; 218. Ultrasonic transducer; 219. Conveying auger; 220. First pulley; 221. First transmission belt; 222. Second pulley; 223. Second transmission belt; 224. Third pulley; 225. Suction hole; 226. Suction groove; 227. Rotating port; 228. Limiting wheel; 229. Filter head; 230. Opening and closing plate module; 231. Suction pipe; 232. Suction pump; 233. Slag outlet; 234. Slag suction hole. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Example 1, according to Figure 1 - Figure 4 As shown, a lithium battery production waste gas treatment and recovery device includes a support 1 and a pretreatment mechanism 2. The pretreatment mechanism 2 is disposed on the top of the support 1 and includes a pretreatment tank 201. Two heating modules 202 are installed inside the pretreatment tank 201, and a cooling module 203 is installed on the outside of the pretreatment tank 201. A sealing cover 204 is installed on the top of the pretreatment tank 201, and a spray module 205 is installed on the top of the sealing cover 204. The bottom output end of the spray module 205 passes through the sealing cover 204 and is connected to a spray head 206. A humidity sensor is installed inside the pretreatment tank 201. 207. A temperature sensor 208 is installed inside the pretreatment tank 201. A wind plate 212 is rotatably connected to the inside of the pretreatment tank 201. A stepper motor 213 is installed on the outside of the pretreatment tank 201. One end of the wind plate 212 passes through the pretreatment tank 201 and is installed outside the output end of the stepper motor 213. An electromagnetic adsorption mesh 214 is sleeved on the outside of the wind plate 212. A slide 215 is installed inside the pretreatment tank 201. The slide 215 is located at the bottom of the wind plate 212. Multiple fixing plates 216 are installed on both sides of the slide 215. Multiple filter screens 217 are installed inside the multiple fixing plates 216.

[0023] The overall effect of Embodiment 1 is as follows: Before the waste gas from lithium battery production is uniformly discharged and requires treatment, the waste gas is discharged into the pretreatment tank 201 through the air inlet 209. The pretreatment tank 201 is turned on to optimize the waste gas. When the temperature fluctuates too much after the high-concentration NMP waste gas from the coating process is mixed with the low-temperature HF-containing waste gas from the liquid injection process, the temperature sensor 208 in the pretreatment tank 201 identifies and activates the heating module 202 and the cooling module 203 to adjust the temperature and stabilize the waste gas temperature within the set range. This prevents NMP from prematurely condensing and adhering to the pipe wall and acidic gases from corroding the equipment at low temperatures. The fan plate 212 quickly moves the waste gas to make its temperature quickly and evenly blend. At the same time, the humidity sensor 207 in the tank detects the mixing. After the exhaust gas humidity is reduced, water vapor is added through the spray module 205 to prevent excessive concentration from overloading the condensation system and to ensure that subsequent steps are under reasonable operating conditions. When the air plate 212 rotates, it synchronously drives the electromagnetic adsorption net 214 to rotate. The electromagnetic adsorption net 214 charges and adsorbs the magnetic metal dust mixed in during the welding process through high-frequency electromagnetic pulses. After the batch work is completed, the power is cut off, and the dust automatically falls to the bottom slide 215, pre-intercepting fine metal dust particles to prevent them from entering the subsequent spray tower and wearing down the packing and contaminating the recovery solvent. The ultrasonic transducer 218 vibrates to shake off the fine metal particles deposited in the slide 215 to the slag outlet 233, which is then discharged to the external collection device.

[0024] Example 2, according to Figure 4 - Figure 7As shown, two suction grooves 226 are installed on the top of the slide 215. Multiple rotating openings 227 are provided on the inner side of each suction groove 226. A conveying auger 219 is rotatably connected to the inner side of each rotating opening 227. Multiple slag suction holes are provided on the outer side of the conveying auger 219, with the other end of each slag suction hole located inside the conveying auger 219. Suction holes 225 are provided on the outer side of the conveying auger 219, with the other end of each suction hole communicating with the multiple slag suction holes. The suction holes 225 are located within the suction groove. Inside 226, one end of multiple transport augers 219 passes through the rotating opening 227 and is fitted with a first pulley 220. A first transmission belt 221 is fitted around the outside of the multiple first pulleys 220. Multiple limiting wheels 228 are provided on the top of the first transmission belt 221. The multiple limiting wheels 228 are respectively located between the multiple first pulleys 220. The multiple limiting wheels 228 are respectively installed on the top of the fixed plate 216. A second pulley is installed on the outside of each of the two transport augers 219 on one side. 222, a second transmission belt 223 is fitted on the outer side of the second pulley 222, and a third pulley 224 is fitted on the inner side of the other end of the second transmission belt 223. Two motor modules 211 are installed on the outer side of the pretreatment tank 201. The third pulley 224 is located on the outer side of the output end of the motor module 211. A filter head 229 is connected to the bottom of one end of the air intake groove 226. An opening and closing plate module 230 is installed at the bottom of the filter head 229, and an air intake pipe 231 is connected to the outer side of the filter head 229. One end of the suction pipe 231 passes through the pretreatment tank 201 and is connected to the suction pump 232. The outer side of the pretreatment tank 201 is connected to the slag outlet 233. The inner end of the slag outlet 233 passes through the pretreatment tank 201 and is connected to the slide 215. The suction pump 232 is installed at the top of the slag outlet 233. The outer side of the pretreatment tank 201 is connected to the air inlet 209. The bottom of the outer side of the pretreatment tank 201 is connected to the air outlet 210. Multiple ultrasonic transducers 218 are installed at the bottom of the slide 215.

[0025] The overall effect of Embodiment 2 is as follows: Particles that cannot be adsorbed by the electromagnetic adsorption mesh 214 are discharged from the bottom outlet 210 with the exhaust gas. When they flow through the filter screen 217, the remaining impurity particles are filtered by the filter screen 217 and retained at the top of the filter screen 217. The motor module 211 is started, and the second transmission belt 223 and the second pulley 222 drive the conveyor auger 219 to rotate. The conveyor auger 219 scrapes the surface of the filter screen 217 and carries the impurities to the slide 215, where they are discharged together with the metal particles. Alternatively, the auger can be started separately to discharge the impurities after the metal particles are discharged. The air pump is started to connect the negative pressure to the suction groove 226 through the air pipe. The suction groove 226 is connected to the suction hole 225 and the slag suction hole, so that the slag suction hole sucks out the impurities attached to the deep layer of the filter screen 217 into the filter head 229. After the batch work is completed, the opening and closing plate module 230 is started to discharge the impurities in the filter head 229. This pretreatment optimization reduces the difficulty of subsequent recycling and improves the efficiency and quality of subsequent work.

[0026] The working principle of the entire device is as follows: Before the waste gas from lithium battery production is discharged and requires treatment, the waste gas is discharged into this device. At this time, the waste gas is discharged into the pretreatment tank 201 through the air inlet 209. The pretreatment tank 201 is then activated to optimize the waste gas. When the temperature difference between the high-concentration NMP waste gas from the coating process and the low-temperature HF-containing waste gas from the liquid injection process is too large, causing temperature fluctuations after mixing, the temperature sensor 208 in the pretreatment tank 201 identifies and activates the heating module 202 and the cooling module 203 to adjust the temperature and stabilize the waste gas temperature within a certain range. This avoids sudden temperature changes that could cause NMP to condense prematurely and adhere to the pipe wall, and low temperatures that could cause acidic gases to corrode the equipment. During this process, the air deflector 212 is used to process the various waste gases. Rapidly rotating the valve ensures rapid and uniform temperature mixing. Simultaneously, the humidity sensor 207 inside the tank detects the humidity of the mixed exhaust gas. Water vapor is replenished via the spray module 205 to prevent excessive concentration from overloading the condensation system, ensuring subsequent components operate within reasonable conditions. As the fan plate 212 rotates, it synchronously drives the electromagnetic adsorption mesh 214 to pre-treat various magnetic metal dust particles introduced during the welding process. High-frequency electromagnetic pulses from the electromagnetic adsorption mesh 214 charge the dust particles, causing them to adhere to the mesh. After batch processing, power is cut off, allowing the dust to automatically fall into the bottom chute 215, pre-intercepting smaller, finer metal dust particles to prevent them from entering the subsequent spray tower, abrading the packing, and contaminating the recovery solvent. Finally, an ultrasonic transducer... Vibration 218 shakes the fine metal particles deposited in the slide 215 into the slag outlet 233, which then discharges them to an external collection device for collection. For particles that cannot be adsorbed by the electromagnetic adsorption net 214, when the exhaust gas from the electromagnetic adsorption net 214 is discharged from the bottom outlet 210, the treated exhaust gas flows through the filter 217 to the bottom of the electromagnetic adsorption net 214. As the exhaust gas passes through the filter 217, the remaining impurities are filtered out and retained at the top of the filter 217. To ensure continuous filtration by the filter 217, the motor module 211 is started, driving the conveyor auger 219 to rotate via the second transmission belt 223 and the second pulley 222. As the conveyor auger 219 rotates, it interacts with the filter... The scraping of the surface of the mesh 217 carries impurities into the slide 215, where they are discharged together with the metal particles falling from the electromagnetic adsorption mesh 214. This allows the auger to be activated after the metal particles have been discharged, allowing them to be discharged separately. To enhance the auger's ability to remove impurities, an air pump is activated to create negative pressure in the suction groove 226 via an air pipe. The connection between the suction groove 226, the suction hole 225, and the sludge suction hole allows the sludge suction hole to draw out impurities adhering to the depths of the filter mesh 217, ultimately carrying them into the filter head 229. After the batch processing is completed, the opening and closing plate module 230 is activated to discharge the impurities from the filter head 229. This pre-treatment of the waste gas optimizes the process, reduces the difficulty of subsequent recycling and treatment, and improves the efficiency and quality of subsequent work.

[0027] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for treating and recovering waste gas from lithium battery production, characterized in that: It includes a support (1) and a pretreatment mechanism (2), wherein the pretreatment mechanism (2) is disposed on the top of the support (1); The pretreatment mechanism (2) includes a pretreatment tank (201), two heating modules (202) are installed inside the pretreatment tank (201), a cooling module (203) is installed outside the pretreatment tank (201), a sealing cover (204) is installed on the top of the pretreatment tank (201), a spray module (205) is installed on the top of the sealing cover (204), the bottom output end of the spray module (205) passes through the sealing cover (204) and is connected to a spray head (206), a humidity sensor (207) is installed inside the pretreatment tank (201), and a temperature sensor (208) is installed inside the pretreatment tank (201).

2. The lithium battery production waste gas treatment and recovery device according to claim 1, characterized in that: A wind plate (212) is rotatably connected to the inner side of the pretreatment barrel (201), and a stepper motor (213) is installed on the outer side of the pretreatment barrel (201). One end of the wind plate (212) passes through the pretreatment barrel (201) and is installed on the outer side of the output end of the stepper motor (213). An electromagnetic adsorption mesh (214) is sleeved on the outer side of the wind plate (212).

3. The lithium battery production waste gas treatment and recovery device according to claim 2, characterized in that: The pretreatment tank (201) is provided with a slide (215) on the inner side. The slide (215) is located at the bottom of the air plate (212). Multiple fixing plates (216) are provided on both sides of the slide (215). Multiple filter screens (217) are provided on the inner side of the multiple fixing plates (216).

4. The lithium battery production waste gas treatment and recovery device according to claim 3, characterized in that: The top of the slide (215) is provided with two air suction grooves (226), and the inner side of the air suction grooves (226) is provided with multiple rotating ports (227). The inner side of each of the multiple rotating ports (227) is rotatably connected to a transport auger (219), and the outer side of the transport auger (219) is provided with multiple slag suction holes (234).

5. The lithium battery production waste gas treatment and recovery device according to claim 4, characterized in that: The other end of the plurality of slag suction holes (234) is located inside the conveying auger (219). An air suction hole (225) is provided on the outside of the conveying auger (219). The other end of the air suction hole (225) is connected to the plurality of slag suction holes (234). The air suction hole (225) is located inside the air suction groove (226).

6. The lithium battery production waste gas treatment and recovery device according to claim 5, characterized in that: One end of each of the multiple transport augers (219) passes through the rotating port (227) and is equipped with a first pulley (220). A first transmission belt (221) is sleeved on the outside of the multiple first pulleys (220). Multiple limit wheels (228) are provided on the top of the first transmission belt (221). The multiple limit wheels (228) are respectively located between the multiple first pulleys (220). The multiple limit wheels (228) are respectively installed on the top of the fixed plate (216).

7. The lithium battery production waste gas treatment and recovery device according to claim 6, characterized in that: A second pulley (222) is installed on the outer side of each of the two transport augers (219) on one side. A second transmission belt (223) is sleeved on the outer side of the second pulley (222). A third pulley (224) is sleeved on the inner side of the other end of the second transmission belt (223). Two motor modules (211) are installed on the outer side of the pretreatment tank (201). The third pulley (224) is located on the outer side of the output end of the motor module (211).

8. The lithium battery production waste gas treatment and recovery device according to claim 7, characterized in that: The bottom of one end of the air intake groove (226) is connected to a filter head (229), and the bottom of the filter head (229) is provided with an opening and closing plate module (230).

9. The lithium battery production waste gas treatment and recovery device according to claim 8, characterized in that: The filter head (229) is connected to an air suction pipe (231) on the outside. One end of the air suction pipe (231) passes through the pretreatment tank (201) and is connected to an air suction pump (232). The pretreatment tank (201) is connected to a slag outlet (233) on the outside. The inner end of the slag outlet (233) passes through the pretreatment tank (201) and is connected to a slide (215). The air suction pump (232) is installed at the top of the slag outlet (233).

10. The lithium battery production waste gas treatment and recovery device according to claim 9, characterized in that: The pretreatment tank (201) has an air inlet (209) connected to its outer side, an air outlet (210) connected to its outer bottom, and multiple ultrasonic transducers (218) installed at the bottom of the slide (215).

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