Integrated system for efficient NMP (N-Methyl Pyrrolidone) recovery and waste gas cooperative treatment in lithium battery industry

Abstract

The invention discloses a lithium battery industry NMP efficient recovery and waste gas cooperative treatment integrated system, and belongs to the technical field of waste gas purification treatment systems, the lithium battery industry NMP efficient recovery and waste gas cooperative treatment integrated system comprises a condenser, a guide pipe at one end of the condenser is connected with an activated carbon chamber through a first air pump, and one end of a guide pipe on the activated carbon chamber extends into a combustion chamber; an air cylinder is fixedly installed on the outer wall of the combustion chamber, a piston rod on the air cylinder penetrates through the shell and extends to a first sliding block on the side wall of the combustion chamber, the bottom of the first sliding block is connected with a shielding plate through a synchronous rod, and the two ends of the first sliding block are connected with second sliding blocks through swing rods. The second sliding block is connected with a sliding groove in the length direction of the top plate. The technical problems that due to normal heat dissipation of the combustion chamber, the combustion chamber cannot be adjusted to a corresponding constant-temperature state even under the continuous action of the heater, NMP cannot be effectively decomposed, and the purification quality is affected can be solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of waste gas purification and treatment systems, and specifically relates to an integrated system for efficient NMP recovery and coordinated waste gas treatment in the lithium battery industry. Background Art

[0002] NMP waste gas refers to waste gas containing N-methylpyrrolidone, or NMP, generated during the lithium battery production process. NMP is a commonly used organic solvent widely used in the semiconductor, chemical, and electronics industries. During lithium battery production, especially in coating processes such as coating the positive and negative electrodes and separators, organic solvents containing NMP are used, resulting in large amounts of NMP in the waste gas. During the coating of the positive and negative electrodes and separators of lithium batteries, organic solvents containing NMP are used, and these solvents form waste gas when they evaporate. Furthermore, waste gas containing NMP is also generated during the electrolyte production process.

[0003] During lithium battery production, NMP, a solvent, generates waste gas. Methods for treating this waste gas include: 1. Waste gas collection: A closed negative pressure collection system collects NMP waste gas from the workshop into a centralized collection pipe. 2. Primary condensation: The waste gas enters a multi-stage condensation device, where the NMP is partially condensed into a liquid through cooling, allowing for initial recovery of the NMP. 3. Adsorption concentration: Incompletely condensed waste gas passes through an adsorption tower equipped with a specialized adsorbent that effectively adsorbs NMP. Once saturated, the adsorbent is regenerated and recovered through thermal or solvent desorption. 4. Advanced treatment: If the recovered exhaust gas still does not meet emission standards, it can be further treated through technologies such as catalytic combustion or catalytic oxidation to ensure harmless emissions.

[0004] During the processing of the NMP generated by the above-mentioned lithium batteries during production, it is necessary to catalytically combust the organic matter to effectively decompose it into harmless carbon dioxide and water. However, due to the normal heat dissipation of the combustion chamber, even under the continuous action of the heater, it is impossible to adjust to the corresponding constant temperature state, thereby preventing the effective decomposition of NMP and affecting the purification quality. In addition, the adsorption structure of particulate impurities in the exhaust gas is relatively simple, and the synergistic treatment effect is poor, which further affects the filtration effect of the exhaust gas and is not conducive to improving the environmental quality. Summary of the Invention

[0005] The purpose of the present invention is to provide an integrated system for efficient NMP recovery and coordinated waste gas treatment in the lithium battery industry to solve the technical problem that due to normal heat dissipation in the combustion chamber, even under the continuous action of the heater, it is impossible to adjust to the corresponding constant temperature state, thereby preventing the effective decomposition of NMP and affecting the purification quality.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] An integrated system for efficient NMP recovery and coordinated waste gas treatment in the lithium battery industry includes a condenser, a conduit on one end of the condenser connected to an activated carbon chamber via a first air pump, and one end of the conduit on the activated carbon chamber extending into a combustion chamber;

[0008] A cylinder is fixedly mounted on the outer wall of the combustion chamber, and a piston rod on the cylinder passes through the housing and extends to a first slider on the side wall of the combustion chamber. The bottom of the first slider is connected to a baffle plate via a synchronization rod, and both ends of the first slider are connected to the second slider via a swing rod. The second slider is connected to a slide groove along the length direction of the top plate;

[0009] The openings at both ends of the top plate are connected to the external duct through inclined tubes. A heater is provided on the side wall of the combustion chamber between the first slider and the baffle, and the side wall of the combustion chamber is connected to a vacuum tube through a heat conduction plate. One end of the vacuum tube extends into the activated carbon chamber, and the other end extends to the preheater on the outer wall of the intake pipe.

[0010] Furthermore, both sides of the swing arm are connected to the first slider and the second slider by a rotational connection, and the top plate is connected to the inner wall of the combustion chamber by a detachable installation. As the first slider drives the baffle to move upward, the baffle is separated from the air inlet, and the second slider closes the opening of the top plate, thereby adjusting the combustion chamber temperature by compressing the volume.

[0011] Furthermore, the combustion chamber and the filter box are connected by a second air pump, and one end of the filter box is connected to the mixing box away from the combustion chamber through a water pump. A motor is fixedly installed at the center of the bottom of the mixing box. The output shaft of the motor passes through the mixing box and is connected to the movable shaft through a screw shaft. The top of the movable shaft is connected to a mixing shaft that is compatible with it through a first telescopic rod.

[0012] Furthermore, the screw shaft and the movable shaft are fixedly connected by a coupling, and a third slider is spirally transmitted on the outer wall of the screw shaft. Both sides of the bottom end of the third slider are connected to the bottom of the inner wall of the mixing box through the second telescopic rod, and the top of the third slider is connected to the fixed plate through the movable support of the push rod. The fixed plate is connected to the movable part on the first telescopic rod by locking and fixing it with a positioning pin, and a rotating groove connected to the push rod is provided at the bottom edge of the fixed plate.

[0013] Furthermore, an L-shaped bending rod is fixedly installed at one end of the push rod, and one end of the L-shaped bending rod passes through the mixing box and extends to the elastic airbag on the bottom plate through the pressure plate. An air inlet pipe and an air outlet pipe are respectively installed at both ends of the elastic airbag. A one-way valve adapted to it is installed on the air inlet pipe, and one end of the air outlet pipe extends to the three-way pipe inside the filter box, and the air outlets at both ends of the three-way pipe are connected to the lifting assembly.

[0014] Furthermore, a partition placed on the side wall of the filter box is provided between the tee pipe and the lifting assembly, and the lifting assembly includes a sleeve placed in the direction of the air outlet of the tee pipe, the bottom of the inner wall of the sleeve is connected to the lifting plate by a compression spring, and the top of the lifting plate is connected to the first filter plate by a fixing rod, the first filter plate is in contact with and fits with the second filter plate installed on the inner wall of the filter box along the direction of movement of the particulate matter, and one end of the second filter plate is connected to a collection box extending to the outer wall of the filter box by an inclined plate.

[0015] Furthermore, the first filter plate and the second filter plate are alternately fitted and arranged, and both the first filter plate and the second filter plate are arranged to be tilted downward in the same direction. The first filter plate is connected to an inclined groove along the height direction of the second filter plate, and the inclined groove is provided with a support portion that is in contact with the first filter plate.

[0016] Furthermore, the first filter plate and the second filter plate are both closed in vertical height direction, and the first filter plate and the second filter plate are both provided with filter holes in the inclined direction, and the top of the collection box is provided with a receiving cavity connected to the particulate matter impurities.

[0017] Furthermore, an activated carbon layer is distributed along the height direction of the inner wall of the activated carbon chamber, and an insulation layer connected to the vacuum tube is provided at one end of the outer wall of the activated carbon layer.

[0018] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0019] (1) In the present invention, the NMP waste gas is first liquefied by condensation and cooling to achieve preliminary recovery. The NMP waste gas that is not completely condensed is effectively adsorbed by the activated carbon layer and then burned and decomposed in the combustion chamber. Since the temperature in the combustion chamber needs to be maintained at a certain constant temperature, in order to avoid excessive temperature difference, the cylinder can drive the first slider to move up and down. During the upward movement of the first slider, the baffle closes the air inlet, and under the action of mechanical transmission, the second sliders at both ends are driven to move outward to close the opening on the top plate, thereby allowing the heating chamber inside the combustion chamber to form a relatively sealed space. 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 chamber, thereby compensating for the heat loss caused by normal conditions in the combustion chamber, and then better controlling and adjusting the temperature inside the heating chamber to maintain a certain constant temperature. The NMP waste gas can be effectively decomposed by the heater, thereby improving the purification quality.

[0020] (2) In the present invention, 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 the heat is transferred to the activated carbon layer and the preheater. When the temperature on the activated carbon layer becomes higher, the adsorption rate can be increased. By increasing the temperature, the random movement speed of the molecules is increased, which accelerates the adsorption rate of the activated carbon. In addition, the preheater can preheat the exhaust gas in the intake pipe on the combustion chamber, thereby ensuring the effective decomposition work and improving the stability of the system.

[0021] (3) In the present invention, the sulfide dissolved in water can be neutralized by adding alkaline liquid into the stirring box. At this time, the motor starts and drives the screw shaft and the first telescopic rod to rotate. The first telescopic rod drives the rotation of the stirring shaft. Under the action of the spiral transmission, the screw shaft can move up and down the third slider on the second telescopic rod. During the movement of the third slider, it can push the first telescopic rod on the fixed disk to move downward. Since the push rod on the third slider is movably supported and connected to the rotating groove on the fixed disk, the movable part on the first telescopic rod can not only drive the stirring shaft to rotate normally, but also move up and down under the pushing action of the push rod and its own gravity. Then, the stirring shaft can be rotated at different heights, so that the neutralization reaction is more fully and effectively carried out, thereby improving the purification quality.

[0022] (4) In the present invention, the push rod can transmit the force to the elastic airbag during the up and down movement. With the elastic recovery effect of the compression spring, the first filter plate connected to the lifting plate can move up and down, and with the second filter plate fixedly set on the inner wall of the box, the particulate impurities entering the water body from the exhaust gas can be further improved and filtered. In addition, the up and down movement is achieved by using the third slider on the spiral transmission, and no additional power source is required, which saves resources, improves the stability of the device operation, and has strong synergistic performance. In addition, a one-way valve is set on the air inlet pipe on the elastic airbag to prevent gas leakage and effectively replenish the gas, further improving the safety of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 This is a schematic diagram of the structure of the integrated system for efficient NMP recovery and waste gas coordinated treatment in the lithium battery industry of the present invention. Figure 1 ;

[0025] Figure 2This is a schematic diagram of the structure of the integrated system for efficient NMP recovery and waste gas coordinated treatment in the lithium battery industry of the present invention. Figure 2 ;

[0026] Figure 3 This is a front view of the integrated system for efficient NMP recovery and coordinated waste gas treatment in the lithium battery industry of the present invention;

[0027] Figure 4 Schematic diagram of the structure of the activated carbon chamber of the present invention;

[0028] Figure 5 It is a structural schematic diagram of the combustion chamber of the present invention;

[0029] Figure 6 This is a schematic diagram of the connection between the filter box and the stirring box of the present invention;

[0030] Figure 7 It is a schematic diagram of the interior of the mixing box of the present invention;

[0031] Figure 8 It is a structural schematic diagram of the fixed disk of the present invention;

[0032] Figure 9 This invention Figure 6 A magnified view of point A;

[0033] Figure 10 It is a schematic diagram of the connection between the first filter plate and the second filter plate of the present invention.

[0034] Figure 1: Condenser; 2: First air pump; 3: Activated carbon chamber; 4: Combustion chamber; 5: Cylinder; 6: Shell; 7: First slider; 8: Synchronous rod; 9: Shielding plate; 10: Second slider; 11: Swinging rod; 12: Top plate; 13: Inclined tube; 14: Heater; 15: Heat conducting plate; 16: Vacuum tube; 17: Preheater; 18: Filter box; 19: Second air pump; 20: Water pump; 21: Mixing box; 22: Motor; 23: Screw shaft; 24: Movable shaft; 25: First telescopic rod; 2 6. Stirring shaft; 27. Third slider; 28. Second telescopic rod; 29. ​​Push rod; 30. Fixed plate; 31. Rotating groove; 32. L-shaped bending rod; 33. Elastic airbag; 34. One-way valve; 35. Tee; 36. Lifting assembly; 37. Partition; 38. Sleeve; 39. Compression spring; 40. Lifting plate; 41. Fixed rod; 42. First filter plate; 43. Second filter plate; 44. Inclined plate; 45. Collecting box; 46. Inclined trough; 47. Filter hole; 48. Activated carbon layer; 49. Insulation layer. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] Reference Manual Figure 1 -Attached Figure 10 As shown, the integrated system for efficient NMP recovery and coordinated waste gas treatment in the lithium battery industry includes a condenser 1. A conduit on one end of the condenser 1 is connected to an activated carbon chamber 3 through a first air pump 2. One end of the conduit on the activated carbon chamber 3 extends into a combustion chamber 4.

[0037] 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 shell 6 and extends to the first slider 7 on the side wall of the combustion chamber 4. The bottom of the first slider 7 is connected to the baffle 9 through the synchronization rod 8, and 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 with a slide groove along the length direction of the top plate 12.

[0038] Specifically, the operating principle of the condenser 1 of the present invention is as follows: Through heat exchange between a cooling medium and the high-temperature exhaust gas, the condenser 1 removes heat from the exhaust gas, thereby lowering the exhaust gas temperature. During this process, NMP vapor condenses into liquid, thereby separating moisture and harmful substances from the exhaust gas. Condenser 1 is equipped with a cooling medium. As the high-temperature exhaust gas passes through condenser 1, the cooling medium absorbs heat from the exhaust gas, lowering the exhaust gas temperature. This process is similar to the cooling principle of a refrigerator: through heat exchange, NMP vapor in the exhaust gas gradually condenses into liquid NMP.

[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 there be corresponding drawings, but this does not affect the implementation of the technical solution of the present invention.

[0040] The NMP waste gas is first liquefied by condensation and cooling to achieve preliminary recovery. The NMP waste gas that is not completely condensed is effectively adsorbed by the activated carbon layer 48, and then burned and decomposed through the combustion chamber 4. Since the temperature in the combustion chamber 4 needs to be maintained at a certain constant temperature state, in order to avoid excessive 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 sliders 10 at both ends are driven to move outward to close the opening on the top plate 12, so that the heating chamber inside the combustion chamber 4 can form a relatively sealed space. 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 chamber, thereby compensating for the heat loss caused by normal conditions in the combustion chamber 4, and then better controlling and adjusting the temperature inside the heating chamber so that it is maintained at a certain constant temperature state. The NMP waste gas can be effectively decomposed by the heater 14, thereby improving the purification quality.

[0041] When the baffle plate 9 closes the air inlet, the second slider 10 also closes the opening. However, since the path between the second slider and the closed pipe mouth of the opening is small, the second slider 10 completes the closing of the opening when the baffle plate 9 moves a short distance. Moreover, the length of the second slider 10 is relatively large, and the opening is still in the closing stage when it continues to move, which does not affect the compression of the gas.

[0042] Specifically, the openings at both ends of the top plate 12 are connected to the external conduit through an inclined tube 13. A heater 14 is provided on the side wall of the combustion chamber 4 between the first slider 7 and the baffle 9, and the side wall of the combustion chamber 4 is connected to a vacuum tube 16 through a heat conducting plate 15. One end of the vacuum tube 16 extends into the activated carbon chamber 3, and the other end extends to the preheater 17 on the outer wall of the intake pipe. The setting of the vacuum tube 16 can effectively transfer heat and ensure heat dissipation as much as possible.

[0043] Both sides of the swing rod 11 are connected to the first slider 7 and the second slider 10 by a rotational connection, and 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 is separated 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.

[0044] When the shielding plate 9 moves downward, the NMP exhaust gas can enter the combustion chamber 4 through the air intake pipe, and the opening on the top plate 12 can be opened under the push of the second slider 10, thereby allowing the NMP exhaust gas to be in a normal circulation state.

[0045] 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 through a water pump 20. A motor 22 is fixedly installed at the bottom center 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 screw shaft 23. The top of the movable shaft 24 is connected to a stirring shaft 26 that is compatible with it through a first telescopic rod 25.

[0046] The screw shaft 23 and the movable shaft 24 are fixedly connected by a coupling, and a third slider 27 is spirally driven on the outer wall of the screw shaft 23. Both sides of the bottom end of the third slider 27 are connected to the bottom of the inner wall of the mixing box 21 through a second telescopic rod 28, and the top of the third slider 27 is movably supported and connected to the fixed plate 30 through a push rod 29. The fixed plate 30 is connected to the movable part on the first telescopic rod 25 by locking and fixing with a locating pin, and a rotating groove 31 connected to the push rod 29 is provided at the bottom edge of the fixed plate 30. The movable part on the first telescopic rod 25 has protrusions at both ends, so that the movable part can not only drive the stirring shaft 26 to rotate normally, but also move up and down under the pushing action.

[0047] Specifically, an L-shaped bending rod 32 is fixedly installed at one end of the push rod 29, and one end of the L-shaped bending rod 32 passes through the mixing box 21 and extends to the elastic air bag 33 on the bottom plate through the pressure plate. An air inlet pipe and an air outlet pipe are respectively installed at both ends of the elastic air bag 33. A one-way valve 34 adapted to it is installed on the air inlet pipe, and one end of the air outlet pipe extends to the three-way pipe 35 inside the filter box 18, and the air outlets at both ends of the three-way pipe 35 are connected to the lifting assembly 36.

[0048] When the combustion chamber 4 is in the temperature control process, heat can be transferred to the vacuum tube 16 through the heat conduction plate 15, and then the heat is transferred to the activated carbon layer 48 and the preheater 17. When the temperature on the activated carbon layer 48 becomes higher, the adsorption speed can be increased. By increasing the temperature, the irregular movement speed of the molecules is increased, which accelerates the adsorption speed of the activated carbon. In addition, the preheater 17 can preheat the exhaust gas in the intake pipe on the combustion chamber 4, thereby ensuring the effective decomposition work and improving the stability of the system.

[0049] A partition 37 placed on the side wall of the filter box 18 is provided between the tee pipe 35 and the lifting assembly 36. The lifting assembly 36 includes a sleeve 38 placed in the direction of the air outlet of the tee pipe 35. The bottom of the inner wall of the sleeve 38 is connected to a lifting plate 40 through a compression spring 39. The top of the lifting plate 40 is connected to the first filter plate 42 through 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 movement of the particulate matter. 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 through an inclined plate 44.

[0050] With the help of the pushing effect of the gas and the elastic recovery effect of the compression spring 39, the first filter plate 42 can be driven to move up and down. Since the filter box 18 is injected with water in advance, the particulate impurities in the NMP exhaust gas can be filtered and gathered when entering the water body. With the help of the gravity of the particulate matter, the particulate impurities can be filtered on the filter hole 47 through layered vibration and slide into the collection box 45. The up and down vibration method can more effectively separate the impurities in the water body, thereby improving the purification quality.

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

[0052] The first filter plate 42 and the second filter plate 43 are alternately fitted and arranged, and the first filter plate 42 and the second filter plate 43 are both arranged to be tilted downward in the same direction. The first filter plate 42 is connected to an inclined groove 46 along the height direction of the second filter plate 43, and the inclined groove 46 is provided with a support portion that is in contact with the first filter plate 42.

[0053] The first filter plate 42 is mainly connected to the inclined support portion along the inclined groove 46 on the second filter plate 43, thereby forming an effective vibration screening effect, and can help the particles to automatically slide down effectively, 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 airbag 33. With the elastic recovery effect of the compression spring 39, the first filter plate 42 connected to the lifting plate 40 can move up and down, and with the second filter plate 43 fixedly set on the inner wall of the box, the particulate impurities entering the waste gas into the water body can be further improved and filtered. The up and down movement is achieved by using the third slider 27 on the spiral transmission, and there is no need to set up an additional power source, which saves resources, improves the stability of the device operation, and has strong synergistic performance. In addition, a one-way valve 34 is set on the air inlet pipe on the elastic airbag 33 to prevent gas leakage and effectively replenish the gas, further improving the safety of the system.

[0055] The first filter plate 42 and the second filter plate 43 are both closed in the vertical height direction, and the first filter plate 42 and the second filter plate 43 are both provided with filter holes 47 in the inclined direction. A receiving cavity connected to the particulate impurities is provided on the top of the collection box 45. An activated carbon layer 48 is distributed in the height direction of the inner wall of the activated carbon chamber 3, and an insulating layer 49 connected to the vacuum tube 16 is provided at one end of the outer wall of the activated carbon layer 48.

[0056] The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

[0057] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to specific embodiments. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. The integrated system for efficient NMP recovery and waste gas coordinated treatment in the lithium battery industry is characterized by: It comprises a condenser (1), wherein a conduit on one end of the condenser (1) is 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) extends into a combustion chamber (4); The outer wall of the combustion chamber (4) is fixedly mounted with a cylinder (5), the piston rod on the cylinder (5) passes through the housing (6) and extends to 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 (9) via a synchronization rod (8), and both ends of the first slider (7) and the second slider (10) are connected via a swing rod (11), and the second slider (10) is connected to a slide groove along the length direction of the top plate (12); The openings at both ends of the top plate (12) are connected to an external conduit via an inclined tube (13); a heater (14) is provided between the first slider (7) and the baffle (9) and is disposed on the side wall of the combustion chamber (4); and a vacuum tube (16) is connected to the side wall of the combustion chamber (4) via a heat conducting plate (15); one end of the vacuum tube (16) extends into the activated carbon chamber (3), and the other end extends into a preheater (17) on the outer wall of the intake pipe.

2. The integrated system for efficient recovery of NMP and coordinated treatment of waste gas in the lithium battery industry according to claim 1, characterized in that: Both sides of the swing rod (11) are connected to the first slider (7) and the second slider (10) by means of a rotational connection, and the top plate (12) is connected to the inner wall of the combustion chamber (4) by means of a detachable installation. As the first slider (7) drives the baffle plate (9) to move upward, the baffle plate (9) is separated 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.

3. The integrated system for efficient recovery of NMP and coordinated treatment of waste gas in the lithium battery industry according to claim 1, characterized in that: The combustion chamber (4) and the filter box (18) are connected via a second air pump (19), and one end of the filter box (18) away from the combustion chamber (4) is connected to the stirring box (21) via a water pump (20). A motor (22) is fixedly mounted at the bottom center of the stirring box (21). The output shaft of the motor (22) passes through the stirring box (21) and is connected to the movable shaft (24) via a screw shaft (23). The top of the movable shaft (24) is connected to a stirring shaft (26) adapted thereto via a first telescopic rod (25).

4. The integrated system for efficient recovery of NMP and coordinated treatment of waste gas in the lithium battery industry according to claim 3, characterized in that: The screw shaft (23) and the movable shaft (24) are fixedly connected via a coupling, and a third slider (27) is spirally driven on the outer wall of the screw shaft (23). Both sides of the bottom end of the third slider (27) are connected to the bottom of the inner wall of the mixing box (21) via a second telescopic rod (28), and the top of the third slider (27) is movably supported and connected to the fixed plate (30) via a push rod (29). The fixed plate (30) is connected to the movable part on the first telescopic rod (25) by locking and fixing with a locating pin, and a rotation groove (31) connected to the push rod (29) is provided at the bottom edge of the fixed plate (30).

5. The integrated system for efficient recovery of NMP and coordinated treatment of waste gas in the lithium battery industry according to claim 4, characterized in that: An L-shaped bending rod (32) is fixedly installed at one end of the pushing rod (29), and one end of the L-shaped bending rod (32) passes through the mixing box (21) and extends to the elastic air bag (33) on the bottom plate through the pressure plate. An air inlet pipe and an air outlet pipe are respectively installed at both ends of the elastic air bag (33), and a one-way valve (34) adapted thereto 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), and the air outlets at both ends of the three-way pipe (35) are connected to the lifting assembly (36).

6. The integrated system for efficient recovery of NMP and coordinated treatment of waste gas in the lithium battery industry according to claim 5, characterized in that: A partition (37) is provided between the three-way pipe (35) and the lifting assembly (36) and is 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). The bottom of the inner wall of the sleeve (38) is connected to a lifting plate (40) via a compression spring (39). The top of the lifting plate (40) is connected to a first filter plate (42) via 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) via an inclined plate (44).

7. The integrated system for efficient recovery of NMP and coordinated treatment of waste gas in the lithium battery industry according to claim 6, characterized in that: The first filter plate (42) and the second filter plate (43) are alternately fitted and arranged, and the first filter plate (42) and the second filter plate (43) are both arranged to be tilted downward in the same direction. The first filter plate (42) is connected to an inclined groove (46) along the height direction of the second filter plate (43), and the inclined groove (46) is provided with a support portion that contacts and connects with the first filter plate (42).

8. The integrated system for efficient recovery of NMP and coordinated treatment of waste gas in the lithium battery industry according to claim 6, characterized in that: The first filter plate (42) and the second filter plate (43) are both designed to be closed in the vertical height direction, and the first filter plate (42) and the second filter plate (43) are both provided with filter holes (47) in the inclined direction, and the top of the collection box (45) is provided with a receiving cavity connected to the particulate matter impurities.

9. The integrated system for efficient recovery of NMP and coordinated treatment of waste gas in the lithium battery industry according to claim 1, characterized in that: An activated carbon layer (48) is distributed along the height direction of the inner wall of the activated carbon chamber (3), and an insulating layer (49) connected to the vacuum tube (16) is provided at one end of the outer wall of the activated carbon layer (48).

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