A purification and precision processing equipment and operation method for lithium battery NMP recovery

Abstract

The present invention discloses a purification and precision processing device and operating method for recovering NMP from lithium batteries, and relates to the technical field of NMP waste liquid purification and recovery. The purification and precision processing device and operating method for recovering NMP from lithium batteries include a processing box and a mist outlet square pipe. The processing box is provided with a mist outlet square pipe at one end, a turbulence mechanism is provided inside the processing box for accelerating the purification speed, a water droplet recovery assembly is provided at the upper end of the processing box for recovering top condensed water droplets, a linkage assembly is provided inside the processing box for controlling the operation of the water droplet recovery assembly, and a secondary recovery assembly is provided at one end of the processing box for deeply recovering water droplets. The turbulence mechanism stirs the NMP waste liquid while driving the NMP waste liquid to flow up and down through a turbulence plate, thereby generating turbulence in the NMP waste liquid, changing the NMP waste liquid from static to dynamic. Based on the principle that dynamic liquids take less time to heat, the time required for heating is reduced, thereby improving purification efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of NMP waste liquid purification and recovery, and in particular to a purification and precision processing device and an operating method for recycling NMP from lithium batteries. Background Art

[0002] A method for recovering and purifying NMP in lithium battery production, which was proposed by searching patent number CN108774163B, includes absorbing NMP waste gas with water to obtain NMP waste liquid; inputting the NMP waste liquid into a first dehydration distillation tower for separation; inputting the heavy components extracted from the bottom of the first dehydration distillation tower into a second dehydration distillation tower for separation; inputting the heavy components extracted from the bottom of the second dehydration distillation tower into an NMP distillation tower for separation; extracting the light components from the top of the NMP distillation tower through adsorption by an adsorbent to remove water and heavy impurities, thereby obtaining treated NMP, wherein the adsorbent includes activated carbon, polyacrylamide-attapulgite clay composite material, diatomaceous earth and molecular sieve. This method uses three towers in series and undergoes precise treatment through an adsorption tower to recover and purify NMP waste gas in lithium battery production into electronic-grade NMP solvent, which can be directly used as a solvent for positive and negative electrode materials in lithium battery production.

[0003] The above patents provide methods and steps for purifying and recycling NMP waste liquid. In real life, when the NMP waste liquid is heated, the liquid is initially in a static state or is simply stirred. The static or regularly stirred liquid has a slow heating reaction, which reduces the purification rate. The accelerated heating rate causes the water vapor formed by the liquid to be unable to be properly processed, resulting in the condensed water droplets dripping back into the NMP waste liquid for secondary gasification, which wastes reaction time. Summary of the Invention

[0004] In response to the shortcomings of the existing technology, the present invention provides a purification and precision processing equipment and operation method for lithium battery NMP recovery, which solves the problems of slow liquid heating efficiency and inability to properly handle condensed water droplets.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a lithium battery NMP recovery purification precision processing equipment and operation method, including a processing box and a mist outlet square tube, one end of the processing box is provided with a mist outlet square tube, the processing box is provided with a turbulent flow mechanism for accelerating the purification speed, the upper end of the processing box is provided with a water droplet recovery component for recovering top condensed water droplets, the processing box is provided with a linkage component for controlling the work of the water droplet recovery component, and one end of the processing box is provided with a secondary recovery component for deep recovery of water droplets;

[0006] The turbulence mechanism includes a driving motor fixedly arranged at the lower end of the processing box, a barrier piece fixedly provided at the bottom of the processing box, a rotating rod rotatably provided in the middle of the processing box, the output end of the driving motor is fixedly connected to one end of the rotating rod, a plurality of stirring rods are fixedly provided on the outside of the rotating rod, a plurality of support rods are fixedly provided inside the processing box, and a fixing ring is fixedly provided between the plurality of support rods.

[0007] Preferably, the fixed ring is sleeved on the outside of the rotating rod, a sliding sleeve is provided for sliding inside the fixed ring, a limit block is fixed on the outside of the sliding sleeve, the limit block slides on the inside of the fixed ring, a driving column is fixed on the outside of the rotating rod, a curved driving groove is provided on the outside of the driving column, a driven sliding rod is fixed on one end of the sliding sleeve, one end of the driven sliding rod slides inside the curved driving groove, a turbulence plate is fixed on the lower end of the sliding sleeve, and an extended arc plate is fixed on the inside of the mist outlet square tube.

[0008] Preferably, the water droplet recovery assembly includes a top plate fixedly arranged at the upper end of the interior of the processing box and a recovery plate rotatably arranged inside the processing box, a plurality of water storage plates are fixedly provided on the outside of the recovery plate, a T-shaped groove is provided at the lower end of the top plate, a sliding block is provided for sliding in the middle of the T-shaped groove, a top scraper is provided for sliding at the lower end of the top plate, and the lower end of the sliding block is fixedly connected to the upper end of the top scraper.

[0009] Preferably, a rectangular shell is fixedly provided at the lower end of the top scraper, and two inclined chutes are symmetrically opened at both ends of the recovery plate, wherein an inclined slider is slidably provided in the middle of one of the inclined chutes, and the inclined slider slides inside the rectangular shell, and an anti-slip plate is fixedly provided at one end of the inclined slider inside the rectangular shell.

[0010] Preferably, the linkage assembly includes a rotating disk fixedly arranged at the upper end of the rotating rod, an inner concave groove is opened in the middle of the rotating disk, a fixed connecting block is slidingly arranged inside the inner concave groove, the cross-section of the fixed connecting block is arranged in an inverted T shape, and an upper connecting block is fixedly arranged at the lower end of the recovery plate.

[0011] Preferably, one end of the upper connecting block and the fixed connecting block are both rotatably provided with a U-shaped connecting block, wherein the middle part of one of the U-shaped connecting blocks is rotatably provided with a driving rod, and the other end of the driving rod is rotatably connected to the middle part of the other U-shaped connecting block.

[0012] Preferably, the secondary recovery component includes a circular plate rotatably arranged in the middle of the processing box, a scraper protrusion is provided at one end of the circular plate close to the recovery plate, a bottom connecting block is fixedly provided at one end of the circular plate close to the recovery plate, and the other end of the bottom connecting block slides in the middle of another inclined slide groove.

[0013] Preferably, a circular water groove is provided in the middle of the circular plate, a water discharge groove is provided at one end of the circular plate, the circular water groove and the water discharge groove are connected to each other, a water guide block is fixedly provided at one end of the treatment box, the water guide block is located below the water discharge groove, a return pipe is fixedly provided on the outside of the treatment box, and one end of the water guide block is connected to the return pipe.

[0014] A method for purifying and precisely processing NMP recovered from lithium batteries, comprising the following steps:

[0015] Step 1: Inject NMP waste liquid into the treatment box through the liquid injection hole, open the heating device wrapped around the outside of the treatment box, heat the NMP waste liquid to generate water vapor, purify it, and slowly stir the heated liquid through the turbulent flow mechanism to cause turbulence in the liquid, thereby accelerating the heating efficiency of the liquid;

[0016] Step 2: When the turbulent flow mechanism is working, the linkage component drives the water droplet recovery component to recover the water droplets condensed on the top to prevent the purified water droplets from dripping back into the NMP waste liquid;

[0017] Step 3: Use the secondary recovery component to recover the NMP waste liquid inside the lower end of the water droplet recovery component.

[0018] Preferably, in step 3, the liquid cleaned out by the water droplet recovery component is discharged from another pipeline into the next set of purification processing equipment through a secondary recovery component for subsequent purification and recovery.

[0019] Beneficial effects

[0020] The present invention provides a purification and precision processing device and operating method for recycling NMP from lithium batteries. Compared with the existing technology, it has the following advantages:

[0021] (1) While the NMP waste liquid is being stirred by the turbulent mechanism, the turbulent plate drives the NMP waste liquid to flow up and down, thereby generating turbulence in the NMP waste liquid and changing the NMP waste liquid from static to dynamic. According to the principle that the dynamic liquid has a shorter heating time, the time required for heating is reduced, thereby improving the purification efficiency.

[0022] (2) The water droplets condensed on the top of the treatment box are scraped and recovered by the recovery plate in the water droplet recovery component to prevent excessive accumulation of water droplets, which causes the distilled water droplets to re-enter the NMP waste liquid and cause secondary distillation purification. This reciprocating process reduces the purification efficiency, so that the recovered water droplets are pre-stored inside the water storage plate. The water droplet recovery component is driven to rotate by the linkage component, so that the recovery plate rotates to a certain angle, and a certain amount of water droplets are stored inside the water storage plate. When rotating, they can enter the mist outlet square tube through the extended arc plate for secondary purification and recovery.

[0023] (3) The lower end of the recovery plate is cleaned by the circular plate in the secondary recovery component, and the places where water droplets may exist are cleaned to the greatest extent, which greatly reduces the probability of NMP waste liquid dripping back after the water droplets condense. The middle part of the circular plate is hollowed out, which greatly reduces the area of water droplets attached to the circular plate. The liquid cleaned by the circular plate is discharged to the next purification process through the water guide block. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic structural diagram of the present invention as a whole;

[0025] Figure 2 A schematic cross-sectional view of a processing box according to the present invention;

[0026] Figure 3 Schematic diagram of the internal structure of the processing box of the present invention;

[0027] Figure 4 Schematic diagram of the turbulent flow mechanism of the present invention;

[0028] Figure 5 is a schematic cross-sectional view of the sliding sleeve of the present invention;

[0029] Figure 6 Schematic diagram of the water droplet recovery mechanism of the present invention;

[0030] Figure 7 A schematic diagram of the drive rod connection of the present invention;

[0031] Figure 8 is a schematic cross-sectional view of the water droplet recovery mechanism of the present invention;

[0032] Figure 9 is a schematic diagram of the tilting slider of the present invention;

[0033] Figure 10 is a schematic diagram of a recovery plate of the present invention;

[0034] Figure 11 Schematic diagram of the circular plate of the present invention.

[0035] In the figure: 1, treatment box; 2, mist outlet square tube; 3, injection hole; 4, turbulence mechanism; 401, drive motor; 402, barrier plate; 403, rotating rod; 404, stirring rod; 405, support rod; 406, fixed ring; 407, sliding sleeve; 408, limit block; 409, driven slide; 410, driving column; 411, curved driving groove; 412, turbulence plate; 5, water drop recovery assembly; 501, top plate; 502, recovery plate; 503, water storage plate; 504, sliding block; 505, top scraper Plate; 506, rectangular shell; 507, T-shaped slide; 508, inclined slider; 509, anti-slip plate; 510, inclined slide; 6, linkage assembly; 601, rotating disk; 602, concave slide; 603, fixed connection block; 604, U-shaped connection block; 605, drive rod; 606, upper connection block; 7, secondary recovery assembly; 701, circular plate; 702, wiper protrusion; 703, circular water channel; 704, drain trough; 705, water guide block; 706, return pipe; 707, bottom connection block. 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] The present invention provides two technical solutions:

[0038] Example 1

[0039] Figure 1-11 The first embodiment is shown: a purification precision processing equipment and operation method for lithium battery NMP recovery, including a processing box 1 and a mist outlet square tube 2. The mist outlet square tube 2 is provided at one end of the processing box 1. A turbulence mechanism 4 for accelerating the purification speed is provided inside the processing box 1. A water droplet recovery component 5 for recovering top condensed water droplets is provided at the upper end of the processing box 1. A linkage component 6 for controlling the operation of the water droplet recovery component 5 is provided inside the processing box 1. A secondary recovery component 7 for deep recovery of water droplets is provided at one end of the processing box 1.

[0040] The turbulence mechanism 4 includes a driving motor 401 fixedly arranged at the lower end of the processing box 1, a barrier piece 402 is fixedly provided at the bottom of the processing box 1, a rotating rod 403 is rotatably provided in the middle of the processing box 1, the output end of the driving motor 401 is fixedly connected to one end of the rotating rod 403, a plurality of stirring rods 404 are fixedly provided on the outside of the rotating rod 403, a plurality of support rods 405 are fixedly provided inside the processing box 1, and a fixing ring 406 is fixedly provided between the plurality of support rods 405.

[0041] In the embodiment of the present invention, a fixed ring 406 is sleeved on the outside of the rotating rod 403, a sliding sleeve 407 is slidingly provided inside the fixed ring 406, a limit block 408 is fixed on the outside of the sliding sleeve 407, the limit block 408 slides on the inside of the fixed ring 406, a driving column 410 is fixed on the outside of the rotating rod 403, a curved driving groove 411 is opened on the outside of the driving column 410, one end of the sliding sleeve 407 is fixed with a driven slide rod 409, one end of the driven slide rod 409 slides inside the curved driving groove 411, a turbulence plate 412 is fixed at the lower end of the sliding sleeve 407, an extended arc plate is fixed inside the mist outlet square tube 2, one end of the driven slide rod 409 is hemispherical, and slides inside the curved driving groove 411 to facilitate the sliding sleeve 407 to slide up and down.

[0042] In an embodiment of the present invention, the water droplet recovery component 5 includes a top plate 501 fixedly arranged at the upper end of the interior of the treatment box 1 and a recovery plate 502 rotatably arranged inside the treatment box 1, a plurality of water storage plates 503 are fixedly provided on the outside of the recovery plate 502, a T-shaped slide groove 507 is provided at the lower end of the top plate 501, a sliding block 504 is provided for sliding in the middle of the T-shaped slide groove 507, a top scraper 505 is provided for sliding at the lower end of the top plate 501, the lower end of the sliding block 504 is fixedly connected to the upper end of the top scraper 505, and the sliding block 504 is arranged in a rectangular shape to prevent the sliding block 504 from rotating when sliding left and right.

[0043] In an embodiment of the present invention, a rectangular shell 506 is fixedly provided at the lower end of the top scraper 505, and two inclined grooves 510 are symmetrically opened at both ends of the recovery plate 502. An inclined slider 508 is slidingly provided in the middle of one of the inclined grooves 510, and the inclined slider 508 slides inside the rectangular shell 506. An anti-slip plate 509 is fixedly provided at one end of the inclined slider 508 inside the rectangular shell 506 to prevent the inclined slider 508 from escaping from the inside of the rectangular shell 506.

[0044] In an embodiment of the present invention, the linkage assembly 6 includes a rotating disk 601 fixedly arranged at the upper end of the rotating rod 403, an inward concave groove 602 is opened in the middle of the rotating disk 601, a fixed connecting block 603 is slidingly provided inside the inward concave groove 602, and the cross-section of the fixed connecting block 603 is an inverted T-shape, and an upper connecting block 606 is fixedly provided at the lower end of the recovery plate 502.

[0045] In an embodiment of the present invention, a U-shaped connecting block 604 is rotatably provided at one end of the upper connecting block 606 and the fixed connecting block 603, wherein a driving rod 605 is rotatably provided in the middle of one of the U-shaped connecting blocks 604, and the other end of the driving rod 605 is rotatably connected to the middle of another U-shaped connecting block 604, and the driving rod 605 drives the recovery plate 502 to rotate through multiple hinged settings.

[0046] Figure 1-26, 8, and 11 show a second embodiment, the main difference from the first embodiment is that the secondary recovery component 7 includes a circular plate 701 rotatably arranged in the middle of the processing box 1, and a wiper protrusion 702 is provided at one end of the circular plate 701 close to the recovery plate 502, and a bottom connecting block 707 is fixedly provided at one end of the circular plate 701 close to the recovery plate 502, and the other end of the bottom connecting block 707 slides in the middle of another inclined slide groove 510.

[0047] In the embodiment of the present invention, a circular water trough 703 is provided in the middle of the circular plate 701, a water drain trough 704 is provided at one end of the circular plate 701, the circular water trough 703 and the water drain trough 704 are connected to each other, a water guide block 705 is fixedly provided at one end of the processing box 1, the water guide block 705 is located below the water drain trough 704, a reflux pipe 706 is fixedly provided on the outside of the processing box 1, one end of the water guide block 705 is connected to the reflux pipe 706, and the water guide block 705 transports the distilled water droplets to the next purification operation through the reflux pipe 706.

[0048] The present invention also discloses a method for purifying and precisely processing NMP recovered from lithium batteries, which specifically includes the following steps:

[0049] Step 1: NMP waste liquid is injected into the processing box 1 through the liquid injection hole 3, and the heating device wrapped around the outside of the processing box 1 is opened to heat the NMP waste liquid to generate water vapor for purification. The heated liquid is slowly stirred by the turbulence mechanism 4 to generate turbulence in the liquid, thereby accelerating the heating efficiency of the liquid;

[0050] Step 2: When the turbulent flow mechanism 4 is working, the linkage component 6 drives the water droplet recovery component 5 to recover the water droplets condensed on the top to prevent the purified water droplets from dripping back into the NMP waste liquid;

[0051] Step 3: Clean the water droplet recovery component 5 through the secondary recovery component 7 to prevent the purified water droplets from dripping back into the NMP waste liquid at the lower end of the treatment box 1 to the greatest extent.

[0052] In the embodiment of the present invention, in step 3, the liquid cleaned out by the water droplet recovery component 5 is discharged from another pipeline into the next group of purification processing equipment through the secondary recovery component 7 for subsequent purification and recovery.

[0053] At the same time, the contents not described in detail in this specification belong to the existing technology known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited, and conventional equipment can be used.

[0054] During use, the operator injects NMP waste liquid into the processing box 1 through the liquid injection hole 3, and then turns on the driving motor 401 in the heating device and the turbulence mechanism 4, so that the driving motor 401 drives the rotating rod 403 to rotate slowly, and the barrier plate 402 is used to prevent liquid leakage. The rotating rod 403 rotates to drive the stirring rod 404 to rotate, thereby stirring the liquid. During the stirring process, the rotating rod 403 drives the driving column 410 to rotate, so that the driving column 410 drives the curved slide to rotate, so that the curved slide drives the sliding sleeve 407 to slide up and down in the middle of the fixed ring 406 through the driven sliding rod 409. The sliding sleeve 407 is caused to slide up and down by the limit block 408 to prevent the sliding sleeve 407 from rotating when sliding up and down. When the sliding sleeve 407 slides up and down, it drives the turbulence plate 412 to move up and down, thereby driving the liquid to flow and increasing the turbulence generated inside the liquid;

[0055] The rotating disk 601 in the linkage assembly 6 is driven to rotate by the rotating rod 403, so that the rotating disk 601 rotates and drives the fixed connecting block 603 to slide in the middle of the concave slide groove 602, and is hinged between the two U-shaped connecting blocks 604 through the driving rod 605. As a result, when the rotating disk 601 rotates, the driving rod 605 rotates and drives the upper connecting block 606 to move, so that the recovery plate 502 in the water drop recovery assembly 5 rotates, so that the recovery plate 502 squeezes the inclined slider 508 through the inclined slide groove 510, so that the inclined slider 508 drives the rectangular shell 506 to move, and the rectangular shell 506 drives the top scraper 505 to move, so that the top scraper 505 cleans the lower end of the top plate 501 to remove the condensed water. The liquid is cleaned into the inside of the recovery plate 502. The top scraper 505 is limited by the sliding block 504 and the T-shaped chute 507, so that when the recovery plate 502 gradually rotates toward the top plate 501, the inclined slider 508 is inclined, so that the inclined slider 508 drives the top scraper 505 to gradually move to the right, the recovery plate 502 is reversed, and the top scraper 505 moves in the opposite direction. The scraped liquid is pre-stored in the groove formed by the water retaining plate 503. When the recovery plate 502 gradually rotates and overlaps with the top plate 501, the liquid is pushed out of the water retaining plate 503 by the top scraper 505, and the pushed out liquid is caught by the extended arc, and the pushed out liquid is discharged into the next purification step through the mist outlet square pipe 2;

[0056] When the recovery plate 502 rotates, the circular plate 701 in the secondary recovery component 7 is driven to rotate, and one end of the bottom connecting block 707 slides inside another inclined groove, and its other end drives the circular plate 701 to rotate, so that the scraping protrusion 702 at one end of the circular plate 701 recovers the water droplets on the lower surface of the recovery plate 502, allowing the water droplets to enter the circular water trough 703. When the circular plate 701 is tilted, the liquid flows along the circular water trough 703 through the water drain trough 704 into the water guide block 705, and then the liquid is discharged into the next purification operation through the reflux pipe 706.

[0057] 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.

[0058] 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 purification and precision processing equipment for recycling NMP from lithium batteries, comprising a processing box (1) and a mist outlet square tube (2), wherein one end of the processing box (1) is provided with the mist outlet square tube (2), characterized in that: The processing box (1) is provided with a turbulent flow mechanism (4) for accelerating the purification speed, the upper end of the processing box (1) is provided with a water droplet recovery component (5) for recovering top condensed water droplets, the processing box (1) is provided with a linkage component (6) for controlling the operation of the water droplet recovery component (5), and one end of the processing box (1) is provided with a secondary recovery component (7) for deeply recovering water droplets; The turbulence mechanism (4) comprises a driving motor (401) fixedly arranged at the lower end of the processing box (1), a barrier sheet (402) fixedly arranged at the bottom of the processing box (1), a rotating rod (403) rotatably arranged in the middle of the processing box (1), an output end of the driving motor (401) fixedly connected to one end of the rotating rod (403), a plurality of stirring rods (404) fixedly arranged on the outside of the rotating rod (403), a plurality of supporting rods (405) fixedly arranged inside the processing box (1), a fixing ring (406) fixedly arranged between the plurality of supporting rods (405), the fixing ring (406) sleeved on the outside of the rotating rod (403), the fixing ring (406) A sliding sleeve (407) is provided inside the fixed ring (406) for sliding movement, a limit block (408) is fixed on the outside of the sliding sleeve (407), and the limit block (408) slides on the inside of the fixed ring (406), a driving column (410) is fixed on the outside of the rotating rod (403), and a curved driving groove (411) is provided on the outside of the driving column (410), a driven sliding rod (409) is fixed on one end of the sliding sleeve (407), and one end of the driven sliding rod (409) slides inside the curved driving groove (411), a turbulence plate (412) is fixed on the lower end of the sliding sleeve (407), and an extended arc plate is fixed inside the mist outlet square tube (2); The water droplet recovery assembly (5) comprises a top plate (501) fixedly arranged at the upper end of the interior of the treatment box (1) and a recovery plate (502) rotatably arranged inside the treatment box (1); a plurality of water storage plates (503) are fixedly arranged on the outer side of the recovery plate (502); a T-shaped chute (507) is provided at the lower end of the top plate (501); a sliding block (504) is slidably provided in the middle of the T-shaped chute (507); a top scraper (505) is slidably provided at the lower end of the top plate (501); the sliding block (504) The lower end is fixedly connected to the upper end of the top scraper (505), and a rectangular shell (506) is fixedly provided at the lower end of the top scraper (505). Two inclined chutes (510) are symmetrically provided at both ends of the recovery plate (502), and an inclined slider (508) is slidably provided in the middle of one of the inclined chutes (510). The inclined slider (508) slides inside the rectangular shell (506), and an anti-slip plate (509) is fixedly provided at one end of the inclined slider (508) inside the rectangular shell (506); The linkage assembly (6) comprises a rotating disk (601) fixedly arranged at the upper end of the rotating rod (403), a concave sliding groove (602) being provided in the middle of the rotating disk (601), a fixed connecting block (603) being slidably provided inside the concave sliding groove (602), the cross section of the fixed connecting block (603) being arranged in an inverted T shape, an upper connecting block (606) being fixedly provided at the lower end of the recovery plate (502), one end of each of the upper connecting block (606) and the fixed connecting block (603) being rotatably provided with a U-shaped connecting block (604), the middle part of one of the U-shaped connecting blocks (604) being rotatably provided with a driving rod (605), the other end of the driving rod (605) being rotatably connected to the middle part of another U-shaped connecting block (604).

2. The purification and precision processing equipment for recycling NMP of a lithium battery according to claim 1, wherein: The secondary recovery component (7) comprises a circular plate (701) rotatably arranged in the middle of the processing box (1), wherein one end of the circular plate (701) close to the recovery plate (502) is provided with a scraper protrusion (702), and one end of the circular plate (701) close to the recovery plate (502) is fixedly provided with a bottom connecting block (707), and the other end of the bottom connecting block (707) slides in the middle of another inclined chute (510).

3. The purification and precision processing equipment for recycling NMP of a lithium battery according to claim 2, wherein: A circular water trough (703) is provided in the middle of the circular plate (701), a water drain trough (704) is provided at one end of the circular plate (701), the circular water trough (703) and the water drain trough (704) are connected to each other, a water guide block (705) is fixedly provided at one end of the treatment box (1), the water guide block (705) is located below the water drain trough (704), a return pipe (706) is fixedly provided on the outside of the treatment box (1), and one end of the water guide block (705) is connected to the return pipe (706).

4. A method for the purification and precision processing of lithium battery NMP using the purification and precision processing equipment for the recovery of lithium battery NMP according to any one of claims 1 to 3, characterized in that: The specific steps include: Step 1: NMP waste liquid is injected into the processing box (1) through the liquid injection hole (3), the heating device wrapped around the outside of the processing box (1) is opened, the NMP waste liquid is heated to generate water vapor, and the NMP waste liquid is purified, and the turbulent flow mechanism (4) is used to slowly stir the liquid during heating to generate turbulence, thereby accelerating the heating efficiency of the liquid; Step 2: When the turbulent flow mechanism (4) is working, the linkage component (6) drives the water droplet recovery component (5) to recover the water droplets condensed on the top to prevent the purified water droplets from dripping back into the NMP waste liquid; Step 3: Clean the water droplet recovery component (5) through the secondary recovery component (7) to prevent the purified water droplets from dripping back into the NMP waste liquid at the lower end of the treatment box (1) to the greatest extent possible.

5. The purification and precision processing operation method for recycling NMP from a lithium battery according to claim 4, wherein: In step 3, the liquid cleaned out by the water droplet recovery component (5) is discharged from another pipeline into the next set of purification processing equipment through the secondary recovery component (7) for subsequent purification and recovery.

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