Integrated system for efficient recovery of nmp and waste gas co-processing in lithium battery industry

Abstract

The application discloses a lithium battery industry NMP efficient recovery and waste gas collaborative treatment integrated system, and belongs to the technical field of waste gas purification treatment systems, which comprises a condenser, a duct on one end of the condenser is connected with an activated carbon chamber through a first air pump, and a duct on the activated carbon chamber extends to a combustion chamber; a gas cylinder is fixedly installed on the outer wall of the combustion chamber, a piston rod on the gas cylinder penetrates a shell and extends on a first sliding block on the side wall of the combustion chamber, a baffle is connected with the first sliding block through a synchronous rod at the bottom of the first sliding block, and the first sliding block is connected with a second sliding block through a swing rod at both ends, and the second sliding block is connected with a sliding groove along the length direction of a top plate. The application can solve the technical problem that the normal heat dissipation of the combustion chamber cannot adjust to the corresponding constant temperature state even under the continuous action of the heater, so that the NMP cannot be effectively decomposed, and the purification quality is affected.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of waste gas purification treatment systems, and particularly relates to an integrated system for efficient NMP recovery and waste gas collaborative treatment in the lithium battery industry. BACKGROUND

[0002] NMP waste gas refers to waste gas containing N-methyl pyrrolidone, i.e., NMP, generated in the production process of lithium batteries. NMP is a commonly used organic solvent and is widely used in the fields of semiconductors, chemicals, electronics, etc. In the production process of lithium batteries, especially in the coating process, such as positive and negative electrode coating and separator coating of lithium batteries, organic solvents containing NMP are used, resulting in a large amount of NMP in the generated waste gas. In the process of positive and negative electrode coating and separator coating of lithium batteries, organic solvents containing NMP are used, and these solvents will form waste gas when volatilized. In addition, NMP-containing waste gas is also generated in the production process of electrolyte.

[0003] In the production process of lithium batteries, NMP is used as a solvent after which waste gas is generated. The methods for treating these waste gases include: 1. Waste gas collection: the NMP waste gas in the workshop is collected into the collection pipeline through a closed negative pressure collection system; 2. Primary condensation: the waste gas enters a multi-stage condensation device, and NMP is partially condensed into a liquid through cooling to preliminarily recover NMP; 3. Adsorption concentration: the waste gas that is not completely condensed is passed through an adsorption tower filled with special adsorbent, the adsorbent can effectively adsorb NMP, and after saturation, the adsorbent is regenerated and recovered by thermal desorption or solvent desorption; 4. Deep treatment: if the tail gas recovered by desorption still does not meet the emission standard, it can be further treated by catalytic combustion or catalytic oxidation to ensure harmless emission.

[0004] In the process of treating the NMP generated in the production of the above lithium batteries, the organic matter is effectively decomposed into harmless carbon dioxide and water through catalytic combustion, but due to the normal heat dissipation of the combustion chamber, even under the continuous action of the heater, the corresponding constant temperature state cannot be adjusted, thereby the NMP cannot be effectively decomposed, affecting the purification quality. In addition, the adsorption structure of the particulate impurities in the waste gas is relatively simple, the collaborative treatment effect is poor, further affecting the filtration effect of the waste gas, and is not conducive to the improvement of environmental quality. SUMMARY

[0005] The purpose of the present application is to provide an integrated system for efficient NMP recovery and waste gas collaborative treatment in the lithium battery industry, to solve the technical problem that due to the normal heat dissipation of the combustion chamber, even under the continuous action of the heater, the corresponding constant temperature state cannot be adjusted, thereby the NMP cannot be effectively decomposed, affecting the purification quality.

[0006] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0007] The integrated system for efficient recovery of NMP in lithium battery industry and waste gas coordinated treatment, including a condenser, a conduit on one end of the condenser is connected with an activated carbon chamber through a first air pump, a conduit on the activated carbon chamber extends to a combustion chamber;

[0008] A cylinder is fixedly installed on the outer wall of the combustion chamber, a piston rod on the cylinder penetrates the shell and extends on a first sliding block on the side wall of the combustion chamber, a baffle is connected to the bottom of the first sliding block through a synchronous rod, and the first sliding block is connected to a second sliding block through a swing rod at both ends.

[0009] The openings at both ends of the top plate are connected to an external conduit through inclined pipes, a heater is arranged between the first sliding block and the baffle and placed on the side wall of the combustion chamber, and the side wall of the combustion chamber is connected with a vacuum pipe through a heat conduction plate, one end of the vacuum pipe extends into the activated carbon chamber, and the other end extends into a preheater on the outer wall of the air inlet pipe.

[0010] Further, the swing rods are connected to the first sliding block and the second sliding block through rotary connections at both sides, and the top plate is connected to the inner wall of the combustion chamber through detachable installation, as the first sliding block drives the baffle to move upward, the baffle is separated from the air inlet, the second sliding block closes the opening of the top plate, so as to adjust the temperature of the combustion chamber by compressing the volume.

[0011] Further, the combustion chamber and the filter box are connected through a second air pump, and one end of the filter box away from the side of the combustion chamber is connected to a stirring tank through a water pump, a motor is fixedly installed at the center of the bottom of the stirring tank, an output shaft of the motor penetrates the stirring tank and is connected to a movable shaft through a lead screw shaft, and the movable shaft is connected to a stirring shaft matched therewith through a first telescopic rod at the top.

[0012] Further, the lead screw shaft and the movable shaft are fixedly connected through a shaft coupling, a third sliding block is spirally transmitted on the outer wall of the lead screw shaft, the bottom ends of the third sliding blocks are connected to the inner wall of the stirring tank through second telescopic rods at both sides, the top of the third sliding block is movably supported and connected to a fixed disc through a push rod, the fixed disc is connected to the movable part on the first telescopic rod through a positioning pin locking fixed mode, and a rotating groove connected to the push rod is arranged at the bottom end edge of the fixed disc.

[0013] Further, an L-shaped bent rod is fixedly installed at one end of the push rod, the L-shaped bent rod penetrates the stirring tank and extends to an elastic air bag on the bottom plate through a pressing plate, an air inlet pipe and an air outlet pipe are respectively installed at both ends of the elastic air bag, a one-way valve matched therewith is installed on the air inlet pipe, one end of the air outlet pipe extends to a three-way pipe inside the filter box, and both end air outlets on the three-way pipe are connected to a lifting assembly.

[0014] Further, the tee pipe and the lifting assembly are provided with a partition plate arranged on the side wall of the filter box, the lifting assembly comprises a sleeve arranged at the direction of the gas outlet of the tee pipe, a lifting plate is connected to the bottom of the inner wall of the sleeve through a compression spring, the top of the lifting plate is connected to a first filter plate through a fixed rod, the first filter plate is in contact with a second filter plate arranged on the inner wall of the filter box along the movement direction of the particulate matter, and the second filter plate is connected with a collecting box extending to the outer wall of the filter box through an inclined plate at one end.

[0015] Further, the first filter plate and the second filter plate are arranged in an alternating manner, and the first filter plate and the second filter plate are arranged in a same direction and inclined downward, the first filter plate is connected with an inclined chute along the height direction of the second filter plate, and the inclined chute is provided with a supporting portion in contact with the first filter plate.

[0016] Further, the first filter plate and the second filter plate are closed in the vertical height direction, and the first filter plate and the second filter plate are provided with filter holes in the inclined surface direction, and the collecting box is provided with a containing cavity connected with the particulate impurities at the top.

[0017] Further, the inner wall of the activated carbon chamber is provided with an activated carbon layer in the height direction, and the outer wall of the activated carbon layer is provided with a heat preservation layer connected with the vacuum pipe at one end.

[0018] As described above, due to the adoption of the above technical scheme, the present application has the following advantages:

[0019] (1) In the present application, the NMP waste gas is first liquefied by condensation cooling to realize preliminary recovery, the NMP waste gas that is not completely condensed is effectively adsorbed by the activated carbon layer, and then is burned and decomposed in the combustion chamber. Since the temperature in the combustion chamber needs to be kept at a certain constant temperature state, in order to avoid too large temperature difference, the first sliding block can be driven to move up and down by the cylinder, during the upward movement of the first sliding block, the baffle closes the air inlet, and under the action of mechanical transmission, the second sliding blocks at both ends are driven to move outward to close the opening on the top plate, thereby forming a relatively sealed space in the heating cavity inside the combustion chamber. During the upward movement of the baffle, the gas is compressed, and the work done by the gas is converted into internal energy, thereby increasing the temperature inside the heating cavity, so as to make up for the heat loss caused by the normal state in the combustion chamber, thereby better controlling and adjusting the temperature inside the heating cavity, so as to keep it at a certain constant temperature state. The NMP waste gas can be effectively decomposed by the heater, and the purification quality is improved.

[0020] (2) In the application, when the combustion chamber is in the temperature control process, heat can be transferred to the vacuum tube through the heat conduction plate, and then transferred to the activated carbon layer and the preheater. When the temperature on the activated carbon layer is high, the adsorption speed can be increased. By increasing the temperature, the speed of the random motion of the molecules is increased, which promotes the speed of the activated carbon adsorption. In addition, the preheater can preheat the exhaust gas in the air inlet pipe of the combustion chamber, thereby ensuring the effective decomposition of the work and improving the stability of the system.

[0021] (3) In the application, the sulfide dissolved in water can be neutralized by adding alkaline liquid in the stirring box. At this time, the motor is started and drives the rotation of the lead screw shaft and the first telescopic rod. The first telescopic rod drives the rotational movement of the stirring shaft. The third sliding block on the second telescopic rod is lifted and moved under the action of the screw transmission. The third sliding block can push the first telescopic rod on the fixed disc to move downward during the movement. Since the push rod on the third sliding block is movably supported and connected in the rotating groove on the fixed disc, the movable part on the first telescopic rod can not only drive the normal rotation of the stirring shaft, but also move up and down under the pushing action of the push rod and its own gravity. In this way, the stirring shaft can rotate at different heights, so that the neutralization reaction is more fully and effectively carried out, and the purification quality is improved.

[0022] (4) In the application, the push rod can transfer the force to the elastic air bag during the up and down movement. The first filter plate connected to the lifting plate can move up and down under the elastic recovery action of the compression spring. The second filter plate fixedly arranged on the inner wall of the box can further improve the screening of the particulate impurities in the exhaust gas entering the water body. In addition, the third sliding block on the screw transmission realizes the up and down movement, without the need for additional power source, saving resources and improving the stability of the device. In addition, the air inlet pipe on the elastic air bag is provided with a one-way valve, which can prevent the gas from leaking out and can effectively supplement the gas, further improving the safety of the system. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creating any inventive labor.

[0024] Figure 1 is a structural diagram of the integrated system for efficient recovery of NMP and waste gas in lithium battery industry Figure One ;

[0025] Figure 2It is the structural diagram of the integrated system of NMP efficient recovery and waste gas collaborative treatment in lithium battery industry of the application Figure Two ;

[0026] Figure 3 It is the front view of the integrated system of NMP efficient recovery and waste gas collaborative treatment in lithium battery industry of the application

[0027] Figure 4 It is the structural diagram of the activated carbon chamber of the application

[0028] Figure 5 It is the structural diagram of the combustion chamber of the application

[0029] Figure 6 It is the connection diagram of the filter box and the stirring box of the application

[0030] Figure 7 It is the internal diagram of the stirring box of the application

[0031] Figure 8 It is the structural diagram of the fixed disc of the application

[0032] Figure 9 It is the enlarged view of A of the application Figure 6

[0033] Figure 10 It is the connection diagram of the first filter plate and the second filter plate of the application

[0034] Reference signs: 1, condenser; 2, first air pump; 3, activated carbon chamber; 4, combustion chamber; 5, air cylinder; 6, shell; 7, first sliding block; 8, synchronous rod; 9, shielding plate; 10, second sliding block; 11, swing rod; 12, top plate; 13, inclined pipe; 14, heater; 15, heat-conducting plate; 16, vacuum pipe; 17, preheater; 18, filter box; 19, second air pump; 20, water pump; 21, stirring box; 22, motor; 23, screw shaft; 24, movable shaft; 25, first telescopic rod; 26, stirring shaft; 27, third sliding block; 28, second telescopic rod; 29, pushing rod; 30, fixed disc; 31, rotating groove; 32, L-shaped bending rod; 33, elastic air bag; 34, one-way valve; 35, three-way pipe; 36, lifting assembly; 37, partition plate; 38, sleeve; 39, compression spring; 40, lifting plate; 41, fixed rod; 42, first filter plate; 43, second filter plate; 44, inclined plate; 45, collection box; 46, inclined chute; 47, filter hole; 48, activated carbon layer; 49, heat preservation layer. DETAILED DESCRIPTION

[0035] ​With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0036] Reference is made to the drawings attached Figure 1 -attached Figure 10 As shown, the integrated system for efficient NMP recovery and waste gas treatment in lithium battery industry comprises a condenser 1, a duct on one end of the condenser 1 is connected with an activated carbon chamber 3 through a first gas pump 2, and a duct on the activated carbon chamber 3 extends to a combustion chamber 4;

[0037] A gas cylinder 5 is fixedly installed on the outer wall of the combustion chamber 4, a piston rod on the gas cylinder 5 penetrates a shell 6 and extends on a first sliding block 7 on the side wall of the combustion chamber 4, a baffle 9 is connected to the bottom of the first sliding block 7 through a synchronous rod 8, and the first sliding block 7 is connected with a second sliding block 10 through swing rods 11 at both ends of the first sliding block 7, and the second sliding block 10 is connected with a sliding groove along the length direction of a top plate 12.

[0038] Specifically, the working principle of the condenser 1 is as follows: the condenser 1 removes the heat in the waste gas through heat exchange between the cooling medium and the high-temperature waste gas, so that the temperature of the waste gas is reduced. In this process, NMP vapor is condensed into liquid, so as to realize the separation of water and harmful substances in the waste gas. The condenser 1 is provided with a cooling medium, and when the high-temperature waste gas passes through the condenser 1, the cooling medium absorbs the heat in the waste gas, so that the temperature of the waste gas is reduced. This process is similar to the refrigeration principle of a refrigerator, and the NMP vapor in the waste gas is gradually condensed into liquid NMP through heat exchange.

[0039] The structure and working principle of the condenser 1 are conventional technical means for those skilled in the art, and will not be described in detail here, nor will the corresponding drawings be shown, but it does not affect the implementation of the technical solutions of the present application.

[0040] The NMP waste gas is first liquefied by condensation cooling to achieve preliminary recovery, and the NMP waste gas that is not completely condensed is effectively adsorbed by the activated carbon layer 48, and then is burned and decomposed by the combustion chamber 4. Since the temperature in the combustion chamber 4 needs to be kept at a certain constant temperature state, in order to avoid a large temperature difference, the cylinder 5 can drive the first slider 7 to move up and down. During the upward movement of the first slider 7, the baffle 9 closes the air inlet, and under the action of mechanical transmission, the second slider 10 at both ends moves outward to close the opening on the top plate 12, thereby forming a relatively sealed space in the heating cavity inside the combustion chamber 4. During the upward movement of the baffle 9, the gas is compressed, and the work done by the gas is converted into internal energy, thereby increasing the temperature inside the heating cavity, thereby compensating for the heat loss in the combustion chamber 4 under normal conditions, and better controlling and adjusting the temperature inside the heating cavity, so that it can be kept at a certain constant temperature state. The NMP waste gas can be effectively decomposed by the heater 14, improving the purification quality.

[0041] When the baffle 9 closes the air inlet, the second slider 10 also closes the opening, but since the path of the second slider and the opening is small, the baffle 9 moves a small distance, and the second slider 10 completes the closing of the opening. Moreover, the second slider 10 is relatively long, and continues to move while the opening is still closed, without affecting the compression of the gas.

[0042] Specifically, the openings at both ends of the top plate 12 are connected to the external conduit through the inclined pipe 13, the heater 14 is arranged between the first slider 7 and the baffle 9 and is arranged on the side wall of the combustion chamber 4, and the side wall of the combustion chamber 4 is connected with the vacuum pipe 16 through the heat conduction plate 15. One end of the vacuum pipe 16 extends into the activated carbon chamber 3, and the other end extends into the preheater 17 on the outer wall of the air inlet pipe. The arrangement of the vacuum pipe 16 can effectively transfer heat and minimize heat loss.

[0043] The swing rods 11 are connected to the first slider 7 and the second slider 10 by rotary connection on both sides, and the top plate 12 is detachably connected to the inner wall of the combustion chamber 4. As the first slider 7 drives the baffle 9 to move upward, the baffle 9 is separated from the air inlet, and the second slider 10 closes the opening on the top plate 12, thereby adjusting the temperature of the combustion chamber 4 by compressing the volume.

[0044] During the downward movement of the baffle 9, the NMP waste gas can enter the combustion chamber 4 through the air inlet pipe, and the opening on the top plate 12 can be in an open state under the pushing action of the second slider 10, thereby enabling the NMP waste gas to be in a normal flow state.

[0045] The combustion chamber 4 and the filter box 18 are connected through the second air pump 19, and one end of the filter box 18 is connected to the stirring box 21 through the water pump 20 away from the side of the combustion chamber 4, the stirring box 21 is fixedly installed with the motor 22 at the bottom center, the output shaft of the motor 22 penetrates the stirring box 21 and is connected to the movable shaft 24 through the lead screw shaft 23, and the movable shaft 24 is connected with the stirring shaft 26 matched therewith through the first telescopic rod 25 at the top.

[0046] The lead screw shaft 23 and the movable shaft 24 are fixedly connected through the shaft coupling, the third sliding block 27 is spirally driven on the outer wall of the lead screw shaft 23, the third sliding block 27 is connected to the inner wall bottom of the stirring box 21 through the second telescopic rod 28 at the bottom of both sides, and the third sliding block 27 is movably supported and connected to the fixed disc 30 through the push rod 29 at the top, the fixed disc 30 is connected with the movable part on the first telescopic rod 25 through the positioning pin locking fixed mode, and the fixed disc 30 is provided with the rotating groove 31 connected with the push rod 29 at the bottom edge, and the movable part on the first telescopic rod 25 is provided with protrusions at both ends, so that the movable part can normally drive the stirring shaft 26 to rotate, and can also move up and down under the pushing action.

[0047] Specifically, the push rod 29 is fixedly installed with an L-shaped bent rod 32 at one end, the L-shaped bent rod 32 penetrates the stirring box 21 and extends to the elastic air bag 33 on the bottom plate through the pressing plate at one end, the elastic air bag 33 is respectively installed with an air inlet pipe and an air outlet pipe at both ends, the air inlet pipe is installed with a one-way valve 34 matched therewith, and the air outlet pipe extends to the three-way pipe 35 inside the filter box 18 at one end, and both ends of the three-way pipe 35 are connected to the lifting assembly 36.

[0048] During the temperature control process of the combustion chamber 4, heat can be transferred to the vacuum tube 16 through the heat conducting plate 15, and then the heat is transferred to the active carbon layer 48 and the preheater 17, when the temperature of the active carbon layer 48 is high, the adsorption speed can be improved, the speed of the random motion of the molecules is increased by increasing the temperature, so as to accelerate the adsorption speed of the active carbon, in addition, the preheater 17 can preheat the exhaust gas in the air inlet pipe of the combustion chamber 4, so as to ensure the effective performance of the decomposition work and improve the stability of the system.

[0049] The three-way pipe 35 and the lifting assembly 36 are provided with a partition plate 37 placed on the side wall of the filter box 18, the lifting assembly 36 includes a sleeve 38 placed in the direction of the air outlet of the three-way pipe 35, a lifting plate 40 is connected to the inner wall bottom of the sleeve 38 through a compression spring 39, the lifting plate 40 is connected to the first filter plate 42 through a fixed rod 41 at the top, the first filter plate 42 is in contact with the second filter plate 43 installed on the inner wall of the filter box 18 along the movement direction of the particulate matter, and the second filter plate 43 is connected with the collecting box 45 extending to the outer wall of the filter box 18 through the inclined plate 44 at one end.

[0050] With the help of the pushing effect of the gas and the elastic recovery effect of the compression spring 39, the up and down movement of the first filter plate 42 can be driven. Since the filter box 18 is previously filled with water, the particulate impurities in the NMP exhaust gas enter the water body and can be filtered and gathered. Combined with the gravity of the particulate matter, the particulate impurities can be filtered on the filter hole 47 by means of layered vibration, and slide into the collection box 45. Moreover, the up and down vibration can more effectively separate the impurities in the water body, thereby improving the purification quality.

[0051] The neutralization reaction of the sulfide dissolved in water can be carried out by adding alkaline liquid in the stirring box 21. At this time, the motor 22 is started and drives the rotation of the lead screw shaft 23 and the first telescopic rod 25. The first telescopic rod 25 drives the rotational movement of the stirring shaft 26. Under the action of screw transmission, the third sliding block 27 on the second telescopic rod 28 can move up and down. The third sliding block 27 can push the first telescopic rod 25 on the fixed disc 30 to move downward during the movement. Since the push rod 29 on the third sliding block 27 is movably supported and connected in the rotating groove 31 on the fixed disc 30, the movable part on the first telescopic rod 25 can not only drive the normal rotation of the stirring shaft 26, but also move up and down under the pushing action of the push rod 29 and the action of its own gravity. In turn, the stirring shaft 26 can rotate at different heights, so that the neutralization reaction is more fully and effectively carried out, and the purification quality is improved.

[0052] The first filter plate 42 and the second filter plate 43 are alternately attached, and the first filter plate 42 and the second filter plate 43 are kept inclined downward in the same direction. The first filter plate 42 is connected with the chute 46 in the height direction of the second filter plate 43, and the chute 46 is provided with a support part in contact with the first filter plate 42.

[0053] The first filter plate 42 is mainly connected with the inclined support part along the chute 46 on the second filter plate 43, so as to form an effective vibrating screening effect, and to help the particulate matter to effectively and automatically slide, thereby facilitating the effective collection of impurities.

[0054] During the up and down movement of the push rod 29, the force can be transmitted to the elastic air bag 33. Combined with the elastic recovery effect of the compression spring 39, the first filter plate 42 connected with the lifting plate 40 can move up and down, and the second filter plate 43 fixedly arranged on the inner wall of the box can further improve the screening of the particulate impurities in the exhaust gas entering the water body. Moreover, the third sliding block 27 on the screw transmission realizes up and down movement, without the need for additional power source, saving resources and improving the stability of the device work. In addition, the air inlet pipe on the elastic air bag 33 is provided with a one-way valve 34, which can prevent the gas from leaking out, and can effectively supplement the gas, further improving the safety of the system.

[0055] The first filter plate 42 and the second filter plate 43 are closed in the vertical height direction, and the first filter plate 42 and the second filter plate 43 are provided with filter holes 47 in the inclined surface direction, the top of the collecting box 45 is provided with a containing cavity connected with the particulate impurities, the inner wall of the activated carbon chamber 3 is provided with an activated carbon layer 48 in the vertical height direction, and the outer wall of the activated carbon layer 48 is provided with a heat preservation layer 49 connected with the vacuum pipe 16.

[0056] The above is only a preferred embodiment of the present application, and the protection scope of the present application is not limited thereto. Any person skilled in the art can make equivalent replacements or changes according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered by the protection scope of the present application.

[0057] The preferred embodiments of the present application disclosed above are only used to help explain the present application. The preferred embodiments do not describe all the details and limit the present application to the specific embodiments. Obviously, many modifications and changes can be made according to the content of the present application. The present application selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present application, so that the person skilled in the art can well understand and utilize the present application. The present application is limited by the claims and the entire scope and equivalents thereof.

Claims

1. An integrated system for efficient NMP recovery and co-treatment of waste gas in the lithium battery industry, characterized in that, Includes a condenser (1), with a conduit on one end of the condenser (1) connected to an activated carbon chamber (3) via a first air pump (2), and one end of the conduit on the activated carbon chamber (3) extending into the combustion chamber (4); A cylinder (5) is fixedly installed on the outer wall of the combustion chamber (4). The piston rod on the cylinder (5) passes through the housing (6) and extends on the first slider (7) on the side wall of the combustion chamber (4). The bottom of the first slider (7) is connected to a baffle plate (9) through a synchronizing rod (8). The two ends of the first slider (7) and the second slider (10) are connected by a swing rod (11). The second slider (10) is connected to a sliding groove along the length of the top plate (12). The openings at both ends of the top plate (12) are connected to the external conduit through the inclined tube (13). A heater (14) is provided between the first slider (7) and the baffle plate (9) on the side wall of the combustion chamber (4). A vacuum tube (16) is connected to the side wall of the combustion chamber (4) through the heat-conducting plate (15). One end of the vacuum tube (16) extends into the activated carbon chamber (3), and the other end extends into the preheater (17) on the outer wall of the air inlet pipe. The swing rod (11) is connected to the first slider (7) and the second slider (10) on both sides by a rotating connection. The top plate (12) is connected to the inner wall of the combustion chamber (4) by a detachable installation. As the first slider (7) drives the baffle (9) to move upward, the baffle (9) disengages from the air inlet, and the second slider (10) closes the opening of the top plate (12), thereby adjusting the temperature of the combustion chamber (4) by compressing the volume. The combustion chamber (4) and the filter box (18) are connected by a second air pump (19), and one end of the filter box (18) away from the combustion chamber (4) is connected to the mixing box (21) by a water pump (20). A motor (22) is fixedly installed at the center of the bottom of the mixing box (21). The output shaft of the motor (22) passes through the mixing box (21) and is connected to the movable shaft (24) through a lead screw (23). The top of the movable shaft (24) is connected to a matching mixing shaft (26) through a first telescopic rod (25). The lead screw shaft (23) and the movable shaft (24) are fixedly connected by a coupling. The lead screw shaft (23) has a third slider (27) spirally driven on its outer wall. The bottom two sides of the third slider (27) are connected to the bottom of the inner wall of the mixing tank (21) by the second telescopic rod (28). The top of the third slider (27) is movably supported and connected to the fixed plate (30) by the push rod (29). The fixed plate (30) is connected to the movable part on the first telescopic rod (25) by locking it with a positioning pin. The bottom edge of the fixed plate (30) is provided with a rotating groove (31) connected to the push rod (29).

2. The integrated system for efficient NMP recovery and co-treatment of waste gas in the lithium battery industry according to claim 1, characterized in that, One end of the push rod (29) is fixedly installed with an L-shaped bending rod (32). One end of the L-shaped bending rod (32) passes through the mixing tank (21) and extends through the pressure plate to the elastic air bag (33) on the bottom plate. The elastic air bag (33) is equipped with an air inlet pipe and an air outlet pipe at both ends. A one-way valve (34) is installed on the air inlet pipe. One end of the air outlet pipe extends to the three-way pipe (35) inside the filter box (18). The two air outlets on the three-way pipe (35) are connected to the lifting assembly (36).

3. The integrated system for efficient NMP recovery and co-treatment of waste gas in the lithium battery industry according to claim 2, characterized in that, A partition (37) is provided between the three-way pipe (35) and the lifting assembly (36) on the side wall of the filter box (18). The lifting assembly (36) includes a sleeve (38) located at the air outlet of the three-way pipe (35). The bottom of the inner wall of the sleeve (38) is connected to a lifting plate (40) by a compression spring (39). The top of the lifting plate (40) is connected to a first filter plate (42) by a fixing rod (41). The first filter plate (42) is in contact with a second filter plate (43) installed on the inner wall of the filter box (18) along the direction of particle movement. One end of the second filter plate (43) is connected to a collection box (45) extending to the outer wall of the filter box (18) by an inclined plate (44).

4. The integrated system for efficient NMP recovery and co-treatment of waste gas in the lithium battery industry according to claim 3, characterized in that, The first filter plate (42) and the second filter plate (43) are alternately attached to each other, and the first filter plate (42) and the second filter plate (43) are both inclined downward in the same direction. The first filter plate (42) is connected to a groove (46) along the height direction of the second filter plate (43). The groove (46) is provided with a support part that abuts against the first filter plate (42).

5. The integrated system for efficient NMP recovery and co-treatment of waste gas in the lithium battery industry according to claim 3, characterized in that, The first filter plate (42) and the second filter plate (43) are both closed in the vertical direction, and filter holes (47) are opened on the inclined surfaces of the first filter plate (42) and the second filter plate (43). The top of the collection box (45) is provided with a receiving cavity connected to particulate impurities.

6. The integrated system for efficient NMP recovery and co-treatment of waste gas in the lithium battery industry according to claim 1, characterized in that, The activated carbon chamber (3) has activated carbon layers (48) distributed along its height direction on its inner wall, and an insulation layer (49) is provided at one end of the outer wall of the activated carbon layer (48) and connected to the vacuum tube (16).

Images