System and method for recovering high-concentration NMP solvent gas during battery coating production

Abstract

The present invention discloses a system and method for recovering high-concentration NMP solvent gas during the battery coating production process. The system and method include an upper separation tank and a lower separation tank, wherein the bottom of the lower separation tank is fixedly connected to a recovery tank, the surface of the upper separation tank is fixedly connected to a support frame, and the upper and lower separation tanks are internally provided with solvent cleaning mechanisms. The present invention relates to the field of battery processing technology. The system and method for recovering high-concentration NMP solvent gas during the battery coating production process is provided with a solvent cleaning mechanism, which utilizes a drive motor to drive the rotation of a drive shaft and a cleaning bar to achieve cleaning and drainage of the solvent on the surface of the filter screen, and cooperates with the transmission of the meshing assembly to enable a material diverter plate to divert liquid inside the drainage groove into the drainage pipe, thereby completing the simultaneous cleaning and drainage operations of the high-concentration NMP solvent, accelerating the recovery operation while avoiding the problem of clogging in subsequent separation operations, thereby making the recovery more complete.

Description

Technical Field

[0001] The present invention relates to the technical field of battery processing, and in particular to a system and method for recovering high-concentration NMP solvent gas in a battery coating production process. Background Art

[0002] With the rapid development of electric vehicles and automobiles, the power supply for vehicles has also developed rapidly. However, many problems exist in battery production, resulting in uneven quality of battery products on the market. The battery capacity and cycle life do not reach the designed service life. This is largely due to the unique production process of batteries. The battery structure consists of a casing, a cover, plates, separators, busbars, poles, bridge protection plates, terminals and other components.

[0003] In the existing battery coating production process, NMP solvent is transported outward along with water vapor. NMP solvent is toxic to a certain extent, and its direct removal has a significant impact on the environment and personnel. In the process of recycling it, there are also the following problems:

[0004] 1. As the water vapor flows, it is integrated into the water vapor and cannot be completely filtered and separated;

[0005] 2. The condensed product easily adheres to the filter and cannot be recycled, causing blockage in subsequent product separation.

[0006] To this end, the present invention provides a system and method for recovering high-concentration NMP solvent gas in the battery coating production process. Summary of the Invention

[0007] In response to the shortcomings of the existing technology, the present invention provides a system and method for recovering high-concentration NMP solvent gas in the battery coating production process, which solves the problem of incomplete separation and recovery of NMP solvent, and the problem that the condensed product easily adheres to the filter and cannot be recovered.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: a recovery system for high-concentration NMP solvent gas in a battery coating production process, comprising an upper separation tank and a lower separation tank, the bottom of the lower separation tank is fixedly connected to a recovery tank, the surface of the upper separation tank is fixedly connected to a support frame, the interior of the upper separation tank and the lower separation tank is provided with a solvent cleaning mechanism, and the inner walls of the upper separation tank and the lower separation tank are provided with a condensation mechanism, and the interior of the recovery tank is provided with a recovery unit, the solvent cleaning mechanism comprises a driving motor and a plurality of separation plates, the driving motor is fixedly mounted on the top of the upper separation tank, one end of the output shaft of the driving motor is fixedly connected to a driving shaft through a coupling, the surface of the driving shaft is fixedly connected to a cleaning bar, the surface of the driving shaft causes the auxiliary shaft to rotate through an engaging assembly, the surface of the auxiliary shaft is provided with a drainage unit, the separation plate is fixedly mounted on the inner walls of the upper and lower separation tanks, the top of the separation plate is fixedly connected to a filter screen, and the cleaning bar is in close contact with the surface of the filter screen.

[0009] Preferably, the meshing assembly includes a driving bevel gear and an auxiliary bevel gear, the driving bevel gear is fixedly mounted on the surface of the driving shaft, the auxiliary bevel gear is fixedly mounted on the surface of the auxiliary shaft, and the surfaces of the driving bevel gear and the auxiliary bevel gear are meshed.

[0010] Preferably, the drainage unit includes a supporting shaft and a swing plate, a drainage groove is provided on the surface of the filter screen, and a drainage pipe is fixedly connected to the bottom of the end of the drainage groove.

[0011] Preferably, a baffle is fixedly connected to the interior of the upper separation tank and the lower separation tank, one end of the supporting shaft is rotatably connected to the baffle, one end of the auxiliary driving shaft is fixedly connected to a rotating plate, the surface of the rotating plate is fixedly connected to a rotating column, and the surface of the swinging plate is provided with a reciprocating groove and a sliding groove.

[0012] Preferably, the surface of the rotating column is slidably connected to the inner surface of the reciprocating groove, the surface of the supporting shaft is slidably connected to the inner surface of the sliding groove, the surface of the swing plate is rotatably connected to a connecting rod, and the surface of the separation plate is provided with a movable groove on one side of the drainage groove.

[0013] Preferably, the surface of the connecting rod is slidably connected to the inner surface of the movable groove, and one end of the connecting rod is fixedly connected to a material-diverting plate, and the surface of the material-diverting plate is slidably connected to the surface of the drainage groove.

[0014] Preferably, the condensation mechanism includes a condenser fixedly installed inside the upper separation tank and the lower separation tank, the surface of the condenser is fixedly connected to an output pipe, and one end of the output pipe is fixedly connected to the surface of the liquid inlet pipe and the drainage pipe installed on the top of the upper separation tank.

[0015] Preferably, the recycling unit includes a recycling box, a slider is fixedly connected to the bottom of the recycling box, a pulling groove is provided on the surface of the recycling tank, a sliding groove is provided on the surface of the pulling groove, and the surface of the slider is slidably connected to the inner surface of the sliding groove.

[0016] The present invention also discloses a recovery method of a high-concentration NMP solvent gas recovery system in a battery coating production process, which specifically comprises the following steps:

[0017] S1, condensation separation: First, the generated water liquid is transferred to the liquid inlet pipe, and the NMP solvent is converted into liquid through the condenser and transferred to the filter screen of the first separation plate to achieve the separation operation of gas and liquid. It is then transferred to the filter screen of the second separation plate through the drainage unit to achieve secondary separation. Finally, the liquid falls into the recovery box, and the air is discharged to the outside through the outlet pipe on the surface of the recovery tank;

[0018] S2, cleaning operation: start the drive motor, use the drive motor to drive the rotation of the drive shaft, and the drive shaft drives the cleaning strip to clean the solvent on the filter screen, so that the solvent falls into the drainage trough and is transmitted downward;

[0019] S3. Drainage operation: After the liquid is transferred to the drainage trough, the driving shaft realizes the rotation of the auxiliary shaft through the transmission of the driving bevel gear and the auxiliary bevel gear, and the auxiliary shaft drives the swing plate to swing back and forth, so that the material plate can move the liquid into the drainage tube inside the drainage trough.

[0020] Preferably, in the operation of condensing the NMP solvent by the condenser in S1, the temperature at which the NMP solvent becomes a solution is Y, and the temperature collected by the sensor in the condenser is X. When X≥Y, the NMP in the water vapor can be converted into a liquid, otherwise it is necessary to continue cooling and condensing.

[0021] Beneficial effects

[0022] The present invention provides a system and method for recovering high-concentration NMP solvent gas during the battery coating production process. Compared with the existing technology, it has the following advantages:

[0023] (1) The system and method for recovering high-concentration NMP solvent gas during the battery coating production process are provided with a solvent cleaning mechanism. A driving motor is used to drive the rotation of the driving shaft and the cleaning strip to clean and drain the solvent on the surface of the filter screen. In addition, the transmission of the engaging assembly is coordinated so that the material-diverting plate diverts the liquid inside the drainage groove into the drainage pipe, thereby completing the simultaneous operation of cleaning and draining the high-concentration NMP solvent, speeding up the recovery operation while avoiding the blockage problem of the subsequent separation operation, thereby making the recovery more complete.

[0024] (2) The system and method for recovering high-concentration NMP solvent gas in the battery coating production process are provided with a condensation mechanism to transfer the generated water liquid to the liquid inlet pipe, and the NMP solvent is converted into liquid through the condenser and transferred to the filter net of the first separation plate to achieve the separation operation of gas and liquid, and is transferred to the filter net of the second separation plate through the drainage unit to achieve secondary separation. Finally, the liquid falls into the recovery box, and the air is discharged to the outside through the air outlet pipe on the surface of the recovery tank, thereby completing the condensation separation operation of the high-concentration NMP solvent gas, making the recovery effect of the high-concentration NMP solvent gas better and avoiding the impact on the external environment and personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is an external three-dimensional structural diagram of the present invention;

[0026] Figure 2 It is a sectional view of the three-dimensional structure of the present invention;

[0027] Figure 3 For the present invention Figure 2 A magnified view of the local structure at center A;

[0028] Figure 4 It is an internal three-dimensional structural diagram of the present invention;

[0029] Figure 5 For the present invention Figure 4 A magnified view of the local structure at point B in the middle;

[0030] Figure 6 It is a partial three-dimensional structure exploded diagram of the present invention;

[0031] Figure 7 For the present invention Figure 6 A magnified view of the local structure at point C in the middle;

[0032] Figure 8 This is a three-dimensional structural exploded view of the recovery unit of the present invention;

[0033] Figure 9 1 is a process flow chart of the recovery method of the present invention;

[0034] Figure 10 This is a temperature regulation logic judgment diagram for the condenser of the present invention.

[0035] In the figure: 1-upper separation tank, 2-lower separation tank, 3-recovery tank, 4-support frame, 5-solvent cleaning mechanism, 51-drive motor, 52-separation plate, 53-drive shaft, 54-cleaning bar, 55-engaging assembly, 55-1-drive bevel gear, 55-2-auxiliary bevel gear, 56-auxiliary shaft, 57-drainage unit, 57-1-support shaft, 57-2-swing plate, 57-3-drainage trough, 5 7-4- drainage pipe, 57-5- baffle, 57-6- rotating plate, 57-7- material diverting plate, 57-8- rotating column, 57-9- reciprocating groove, 57-10- sliding groove, 57-11- connecting rod, 57-12- moving groove, 58- filter screen, 6- condensation mechanism, 61- condenser, 62- output pipe, 7- recovery unit, 71- recovery box, 72- slider, 73- pulling groove, 74- slide groove. DETAILED DESCRIPTION

[0036] 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.

[0037] See also Figure 1-10 , the present invention provides three technical solutions:

[0038] Example 1

[0039] A recovery system for high-concentration NMP solvent gas in a battery coating production process includes an upper separation tank 1 and a lower separation tank 2, wherein the bottom of the lower separation tank 2 is fixedly connected to a recovery tank 3, the surface of the upper separation tank 1 is fixedly connected to a support frame 4, a solvent cleaning mechanism 5 is provided inside the upper separation tank 1 and the lower separation tank 2, and a condensation mechanism 6 is provided on the inner walls of the upper separation tank 1 and the lower separation tank 2, and a recovery unit 7 is provided inside the recovery tank 3, the solvent cleaning mechanism 5 includes a drive motor 51 and a plurality of separation plates 52, the drive motor 51 is fixedly mounted on the top of the upper separation tank 1, one end of the output shaft of the drive motor 51 is fixedly connected to a drive shaft 53 through a coupling, a cleaning bar 54 is fixedly connected to the surface of the drive shaft 53, the surface of the drive shaft 53 causes an auxiliary shaft 56 to rotate through an engaging assembly 55, and a drainage unit 57 is provided on the surface of the auxiliary shaft 56, the separation plate 52 is fixedly mounted on the inner walls of the upper separation tank 1 and the lower separation tank 2, the top of the separation plate 52 is fixedly connected to a filter screen 58, and the cleaning bar 54 is in close contact with the surface of the filter screen 58.

[0040] Example 2

[0041] The recovery system of high-concentration NMP solvent gas in the battery coating production process includes an upper separation tank 1 and a lower separation tank 2, the bottom of the lower separation tank 2 is fixedly connected to a recovery tank 3, the surface of the upper separation tank 1 is fixedly connected to a support frame 4, the upper separation tank 1 and the lower separation tank 2 are provided with a solvent cleaning mechanism 5, and the inner walls of the upper separation tank 1 and the lower separation tank 2 are provided with a condensation mechanism 6, the condensation mechanism 6 includes a condenser 61 fixedly installed inside the upper separation tank 1 and the lower separation tank 2, the surface of the condenser 61 is fixedly connected to an output pipe 62, one end of the output pipe 62 is fixedly connected to the surface of the liquid inlet pipe and the drainage pipe 57-4 installed on the top of the upper separation tank 1, and the interior of the recovery tank 3 is provided with a recovery unit 7, the recovery unit 7 includes a recovery box 71, and the recovery The bottom of the box 71 is fixedly connected with a slider 72, the surface of the recovery tank 3 is provided with a pulling groove 73, the surface of the pulling groove 73 is provided with a slide groove 74, the surface of the slider 72 is slidably connected to the inner surface of the slide groove 74, the solvent cleaning mechanism 5 includes a drive motor 51 and a plurality of separation plates 52, the drive motor 51 is fixedly installed on the top of the upper separation tank 1, one end of the output shaft of the drive motor 51 is fixedly connected to the drive shaft 53 through a coupling, the surface of the drive shaft 53 is fixedly connected to the cleaning bar 54, the surface of the drive shaft 53 causes the auxiliary shaft 56 to rotate through the meshing assembly 55, the meshing assembly 55 includes a drive bevel gear 55-1 and an auxiliary bevel gear 55-2, the drive bevel gear 55-1 is fixedly installed on the surface of the drive shaft 53, and the auxiliary bevel gear The wheel 55-2 is fixedly mounted on the surface of the auxiliary rotating shaft 56, and the surfaces of the driving bevel gear 55-1 and the auxiliary bevel gear 55-2 are meshed. The surface of the auxiliary rotating shaft 56 is provided with a drainage unit 57, which includes a supporting rotating shaft 57-1 and a swinging plate 57-2. A drainage groove 57-3 is provided on the surface of the filter screen 58, and the bottom of the end of the drainage groove 57-3 is fixedly connected to the drainage pipe 57-4. The interior of the upper separation tank 1 and the lower separation tank 2 is fixedly connected with a baffle 57-5, one end of the supporting rotating shaft 57-1 is rotatably connected to the baffle 57-5, one end of the auxiliary rotating shaft 56 is fixedly connected to a rotating plate 57-6, the surface of the rotating plate 57-6 is fixedly connected to a rotating column 57-8, and the surface of the swinging plate 57-2 is provided with a reciprocating groove 57- 9 and the sliding groove 57-10, the surface of the rotating column 57-8 is slidably connected to the inner surface of the reciprocating groove 57-9, the surface of the supporting shaft 57-1 is slidably connected to the inner surface of the sliding groove 57-10, the surface of the swing plate 57-2 is rotatably connected to the connecting rod 57-11, the surface of the separation plate 52 and a moving groove 57-12 is provided on one side of the drainage groove 57-3, the surface of the connecting rod 57-11 is slidably connected to the inner surface of the moving groove 57-12, and one end of the connecting rod 57-11 is fixedly connected to the material stripping plate 57-7, and the surface of the material stripping plate 57-7 is slidably connected to the surface of the drainage groove 57-3, the separation plate 52 is fixedly installed on the inner wall of the upper separation tank 1 and the lower separation tank 2, and the top of the separation plate 52 is fixedly connected to the filter screen 58,The cleaning strip 54 is in close contact with the surface of the filter screen 58.

[0042] Example 3

[0043] A recovery system for high-concentration NMP solvent gas in the battery coating production process includes an upper separation tank 1 and a lower separation tank 2. Separation units are provided inside the upper separation tank 1 and the lower separation tank 2. The bottom of the lower separation tank 2 is fixedly connected to a recovery tank 3. The surface of the upper separation tank 1 is fixedly connected to a support frame 4. A solvent cleaning mechanism 5 is provided inside the upper separation tank 1 and the lower separation tank 2. The inner walls of the upper separation tank 1 and the lower separation tank 2 are provided with a condensation mechanism 6. The condensation mechanism 6 includes a condenser 61 fixedly installed inside the upper separation tank 1 and the lower separation tank 2. The condenser 61 is electrically connected to an external power supply and is a component of a refrigeration system. It is a type of heat exchanger that can convert gas or vapor into liquid and transfer the heat in the pipe to the surrounding areas of the pipe in a very fast manner. In the air, the surface of the condenser 61 is fixedly connected with an output pipe 62, and one end of the output pipe 62 is fixedly connected to the surface of the liquid inlet pipe and the drainage pipe 57-4 installed on the top of the upper separation tank 1. The condensation mechanism 6 is provided to transmit the generated water to the liquid inlet pipe, and the NMP solvent is formed into a liquid through the condenser 61 and transmitted to the filter screen 58 of the first separation plate 52 to realize the separation operation of gas and liquid, and is transmitted to the filter screen 58 of the second separation plate 52 through the drainage unit 57 to realize secondary separation, and finally the liquid falls into the recovery box 71, and the air is discharged outward through the air outlet pipe on the surface of the recovery tank 3, thereby completing the condensation and separation operation of the high-concentration NMP solvent gas, making the recovery effect of the high-concentration NMP solvent gas better and avoiding The recycling unit 7 includes a recycling box 71, and a slider 72 is fixedly connected to the bottom of the recycling box 71. The sliding between the slider 72 and the slide 74 facilitates the taking operation of the recycling box 71. A pulling groove 73 is provided on the surface of the recycling tank 3, and a slide 74 is provided on the surface of the pulling groove 73. The surface of the slider 72 is slidably connected to the inner surface of the slide 74. The solvent cleaning mechanism 5 includes a driving motor 51 and a plurality of separation plates 52. The driving motor 51 is a three-phase asynchronous motor. The driving motor 51 is electrically connected to an external power supply. The driving motor 51 is fixedly mounted on the top of the upper separation tank 1, and one end of the output shaft of the driving motor 51 is fixedly connected to the driving shaft 5 through a coupling. 3. A cleaning strip 54 is fixedly connected to the surface of the driving shaft 53. The cleaning strip 54 is used to clean the solvent on the surface of the filter 58 to avoid clogging. The surface of the driving shaft 53 causes the auxiliary shaft 56 to rotate through the meshing assembly 55. The meshing assembly 55 includes a driving bevel gear 55-1 and an auxiliary bevel gear 55-2. The driving bevel gear 55-1 is fixedly mounted on the surface of the driving shaft 53. The auxiliary bevel gear 55-2 is fixedly mounted on the surface of the auxiliary shaft 56. The surfaces of the driving bevel gear 55-1 and the auxiliary bevel gear 55-2 are meshed. A drainage unit 57 is provided on the surface of the auxiliary shaft 56. The drainage unit 57 includes a supporting shaft 57-1 and a swing plate 57-2. A drainage groove 57-3 is provided on the surface of the filter 58.The drainage groove 57-3 facilitates the liquid to continue to flow downward, and the bottom of the end of the drainage groove 57-3 is fixedly connected to the drainage pipe 57-4. The interior of the upper separation tank 1 and the lower separation tank 2 are fixedly connected with a baffle 57-5, which is used to support the rotation of the auxiliary rotating shaft 56 and the supporting rotating shaft 57-1. One end of the supporting rotating shaft 57-1 is rotatably connected to the baffle 57-5. One end of the auxiliary rotating shaft 56 is fixedly connected to a rotating plate 57-6. The surface of the rotating plate 57-6 is fixedly connected to the rotating column 5 7-8, a reciprocating groove 57-9 and a sliding groove 57-10 are provided on the surface of the swing plate 57-2, the surface of the rotating column 57-8 is slidably connected to the inner surface of the reciprocating groove 57-9, the surface of the supporting shaft 57-1 is slidably connected to the inner surface of the sliding groove 57-10, the surface of the swing plate 57-2 is rotatably connected to the connecting rod 57-11, the surface of the separation plate 52 and the side of the drainage groove 57-3 are provided with a moving groove 57-12, the surface of the connecting rod 57-11 is connected to the moving groove 57-11, and the surface of the connecting rod 57-11 is connected to the moving groove 57-11. 7-12 is slidably connected, and one end of the connecting rod 57-11 is fixedly connected to a material stripping plate 57-7, and the surface of the material stripping plate 57-7 is slidably connected to the surface of the drainage groove 57-3. The separation plate 52 is fixedly installed on the inner wall of the upper separation tank 1 and the lower separation tank 2. The top of the separation plate 52 is fixedly connected with a filter screen 58. The filter screen 58 can realize the downward transmission of gas and block the passage of NMP solution. The cleaning bar 54 is in close contact with the surface of the filter screen 58. By providing a solvent cleaning mechanism 5, the driving motor 51 drives the driving shaft 53 and the cleaning bar 54 to rotate, thereby cleaning and draining the solvent on the surface of the filter screen 58, and cooperating with the transmission of the meshing component 55, the material stripping plate 57-7 is used to move the liquid inside the drainage groove 57-3 into the drainage pipe 57-4, thereby completing the cleaning and drainage of the high-concentration NMP solvent. While speeding up the recovery operation, it avoids the blockage problem of the subsequent separation operation, thereby making the recovery more complete.

[0044] The embodiment of the present invention also discloses a recovery method of a high-concentration NMP solvent gas recovery system in a battery coating production process, which specifically includes the following steps:

[0045] S1, Condensation Separation: First, the generated water liquid is transferred to the liquid inlet pipe, and the NMP solvent is converted into liquid through the condenser 61 and transferred to the filter 58 of the first separation plate 52 to achieve gas and liquid separation. The liquid is then transferred to the filter 58 of the second separation plate 52 through the drainage unit 57 to achieve secondary separation. Finally, the liquid falls into the recovery box 71, and the air is discharged to the outside through the outlet pipe on the surface of the recovery tank 3;

[0046] S2, cleaning operation: start the drive motor 51, use the drive motor 51 to drive the drive shaft 53 to rotate, and the drive shaft 53 drives the cleaning bar 54 to clean the solvent on the filter 58, causing it to fall into the drainage groove 57-3 and be transported downward;

[0047] S3, drainage operation: After the liquid is transferred to the drainage groove 57-3, the driving shaft 53 realizes the rotation of the auxiliary driving shaft 56 through the transmission of the driving bevel gear 55-1 and the auxiliary driving bevel gear 55-2, and the auxiliary driving shaft 56 drives the swing plate 57-2 to swing back and forth, so that the material plate 57-7 can move the liquid inside the drainage groove 57-3 into the drainage tube 57-4.

[0048] In the embodiment of the present invention, the condenser 61 in S1 condenses the NMP solvent. Assume that the temperature at which the NMP solvent becomes a solution is Y, and the temperature collected by the sensor in the condenser 61 is X. When X ≥ Y, the NMP in the water vapor can be converted into a liquid. Otherwise, further cooling and condensation are required.

[0049] At the same time, the contents not described in detail in this specification belong to the existing technology well known to those skilled in the art.

[0050] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0051] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A recovery system for high-concentration NMP solvent gas in a battery coating production process, comprising an upper separation tank (1) and a lower separation tank (2), wherein the bottom of the lower separation tank (2) is fixedly connected to a recovery tank (3), and the surface of the upper separation tank (1) is fixedly connected to a support frame (4), characterized in that: A solvent cleaning mechanism (5) is provided inside the upper separation tank (1) and the lower separation tank (2), a condensing mechanism (6) is provided on the inner walls of the upper separation tank (1) and the lower separation tank (2), and a recovery unit (7) is provided inside the recovery tank (3); The solvent cleaning mechanism (5) includes a driving motor (51) and a plurality of separation plates (52), wherein the driving motor (51) is fixedly mounted on the top of the upper separation tank (1), one end of the output shaft of the driving motor (51) is fixedly connected to a driving shaft (53) through a coupling, a cleaning bar (54) is fixedly connected to the surface of the driving shaft (53), the surface of the driving shaft (53) causes the auxiliary shaft (56) to rotate through an engaging assembly (55), and a drainage unit (57) is provided on the surface of the auxiliary shaft (56), the separation plates (52) are fixedly mounted on the inner walls of the upper separation tank (1) and the lower separation tank (2), the top of the separation plates (52) is fixedly connected to a filter screen (58), the filter screen (58) realizes the downward transmission of gas and blocks the passage of NMP solution, and the cleaning bar (54) is in close contact with the surface of the filter screen (58); The drainage unit (57) includes a supporting shaft (57-1) and a swing plate (57-2), a drainage groove (57-3) is provided on the surface of the filter screen (58), and a drainage pipe (57-4) is fixedly connected to the bottom of the end of the drainage groove (57-3), a baffle (57-5) is fixedly connected to the interior of the upper separation tank (1) and the lower separation tank (2), one end of the supporting shaft (57-1) is rotatably connected to the baffle (57-5), one end of the auxiliary driving shaft (56) is fixedly connected to a rotating plate (57-6), a rotating column (57-8) is fixedly connected to the surface of the rotating plate (57-6), and a reciprocating groove (57-9) and a sliding groove (57-1) are provided on the surface of the swing plate (57-2). 57-10), the surface of the rotating column (57-8) is slidably connected to the inner surface of the reciprocating groove (57-9), the surface of the supporting shaft (57-1) is slidably connected to the inner surface of the sliding groove (57-10), the surface of the swing plate (57-2) is rotatably connected to the connecting rod (57-11), the surface of the separation plate (52) is provided with a moving groove (57-12) on one side of the drainage groove (57-3), the surface of the connecting rod (57-11) is slidably connected to the inner surface of the moving groove (57-12), and one end of the connecting rod (57-11) is fixedly connected to a material stripping plate (57-7), and the surface of the material stripping plate (57-7) is slidably connected to the surface of the drainage groove (57-3).

2. The recovery system of high-concentration NMP solvent gas in the battery coating production process according to claim 1, characterized in that: The meshing assembly (55) comprises a driving bevel gear (55-1) and an auxiliary bevel gear (55-2); the driving bevel gear (55-1) is fixedly mounted on the surface of a driving rotating shaft (53); the auxiliary bevel gear (55-2) is fixedly mounted on the surface of an auxiliary rotating shaft (56); and the surfaces of the driving bevel gear (55-1) and the auxiliary bevel gear (55-2) are meshed.

3. The recovery system of high-concentration NMP solvent gas in the battery coating production process according to claim 2, characterized in that: The condensing mechanism (6) includes a condenser (61) fixedly mounted inside the upper separation tank (1) and the lower separation tank (2); an output pipe (62) is fixedly connected to the surface of the condenser (61); one end of the output pipe (62) is fixedly connected to the surface of the liquid inlet pipe and the drainage pipe (57-4) mounted on the top of the upper separation tank (1).

4. The recovery system of high-concentration NMP solvent gas in the battery coating production process according to claim 3, characterized in that: The recycling unit (7) includes a recycling box (71), the bottom of the recycling box (71) is fixedly connected to a slider (72), the surface of the recycling tank (3) is provided with a pulling groove (73), the surface of the pulling groove (73) is provided with a sliding groove (74), and the surface of the slider (72) is slidably connected to the inner surface of the sliding groove (74).

5. Implement the recovery method of the high-concentration NMP solvent gas recovery system in the battery coating production process as claimed in claim 4, characterized in that: The specific steps include: S1, condensation separation: first, the generated water liquid is transferred to the liquid inlet pipe, and the NMP solvent is converted into liquid through the condenser (61) and transferred to the filter (58) of the first separation plate (52) to achieve the separation operation of gas and liquid, and then transferred to the filter (58) of the second separation plate (52) through the drainage unit (57) to achieve secondary separation, and finally the liquid falls into the recovery box (71), and the air is discharged to the outside through the outlet pipe on the surface of the recovery tank (3); S2, cleaning operation: starting the driving motor (51), using the driving motor (51) to drive the driving shaft (53) to rotate, and the driving shaft (53) drives the cleaning bar (54) to clean the solvent on the filter (58), so that the solvent falls into the drainage groove (57-3) and is transmitted downward; S3, drainage operation: After the liquid is transferred to the drainage groove (57-3), the driving shaft (53) realizes the rotation of the auxiliary driving shaft (56) through the transmission of the driving bevel gear (55-1) and the auxiliary driving bevel gear (55-2), and the auxiliary driving shaft (56) drives the swing plate (57-2) to swing back and forth, so that the material diverting plate (57-7) diverts the liquid inside the drainage groove (57-3) into the drainage tube (57-4).

6. The method for recovering high-concentration NMP solvent gas in a battery coating production process according to claim 5, characterized in that: The condenser (61) in S1 condenses the NMP solvent.

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