CN118099587B - Lithium ion battery slurry recycling equipment and recycling method based on rake drying - Google Patents

Abstract

The invention relates to the field of lithium ion battery slurry recovery, in particular to a lithium ion battery slurry recovery device based on rake drying, which comprises a reaction container and a rake stirring mechanism, wherein the reaction container is provided with a feed inlet and a discharge outlet, a vacuum port is arranged at the feed inlet, the rake stirring mechanism is arranged in the reaction container, the rake stirring mechanism is provided with a rotating shaft and a rotating rake assembly, the rotating shaft is rotatably arranged in the reaction container, the rotating rake assemblies are provided with a plurality of rotating rake assemblies which are distributed at equal intervals along the axis direction of the rotating shaft, and a vibration assembly is arranged between each rotating rake assembly and the rotating shaft. The invention also relates to a lithium ion battery slurry recycling method based on rake drying.

Description

Lithium ion battery slurry recycling equipment and recycling method based on rake drying

Technical Field

The invention relates to the field of lithium ion battery slurry recovery, in particular to a lithium ion battery slurry recovery device based on rake drying, and also relates to a lithium ion battery slurry recovery method based on rake drying.

Background

Collecting waste lithium ion battery slurry, including waste battery slurry composed of anode and cathode active substances, electrolyte, conductive agent and the like, filtering the collected waste battery slurry to remove impurities, soaking the filtered slurry to dissolve and separate useful materials, sending the soaked slurry into recovery equipment based on rake drying, stirring the slurry in the equipment by a stirring rake in the equipment to fully dry and disperse the slurry, wherein volatile substances such as moisture, organic solvent and the like can be evaporated in the process, and the useful materials can be recovered.

The currently disclosed Chinese patent CN115764039A is a lithium battery slurry recycling device and a lithium battery slurry recycling method, and comprises a reaction container, a reaction device and a liquid crystal display device, wherein the reaction container is provided with an inner space for accommodating lithium battery slurry to be recycled; the reaction container is also integrated with an oil guide pipeline, and an oil inlet and an oil outlet which are communicated with the oil guide pipeline; the oil temperature machine is connected to the oil inlet and the oil outlet so as to inject heat conduction oil into the oil inlet and receive the heat conduction oil sent by the oil outlet; the oil temperature machine is used for heating the materials in the reaction container to 240-250 ℃; the stirring mechanism is arranged in the inner space of the reaction container and is used for stirring materials in the reaction container in the recovery process; a vacuum pump acting on the inside of the reaction vessel to generate negative pressure; the condenser is connected between the reaction container and the vacuum pump; the liquid storage tank is connected between the condenser and the vacuum pump.

The currently disclosed Chinese patent CN117213191A relates to a rake type vacuum dryer for lithium battery slurry and a method for recovering the lithium battery slurry, and the rake type vacuum dryer comprises a reaction container, wherein a hollow cavity is arranged at the outer wall part of the reaction container, and two vacuumizing and filtering mechanisms are arranged at the top part of the reaction container; the double heating mechanism comprises an oil path heating mechanism and an electromagnetic heating mechanism, and the oil path heating mechanism and the electromagnetic heating mechanism are both arranged in the cavity; a harrow formula rabbling mechanism for inside material uniform stirring of reaction vessel and high-efficient dispersion, harrow formula rabbling mechanism includes a plurality of regular or irregular material stirring harrows of distributing outside the (mixing) shaft, a plurality of material stirring harrows coaxial setting, and the tail of material stirring harrow tail end infinitely is close to reaction vessel's inner wall, material stirring harrow head end and (mixing) shaft junction are the trapezoidal form.

According to the above two patents, the stirring effect is uneven in the stirring process of the stirring rake, the slurry solution adheres to the surface of the stirring rake and is difficult to disperse, and the agglomeration occurs, so it is required to design a stirring mechanism capable of preventing adhesion in the stirring process of the slurry, so that the slurry can achieve an even drying effect in the dryer.

Disclosure of Invention

According to the invention, slurry is uniformly dispersed through stirring the slurry in the process that the rotating rake assembly follows the rotating shaft, and the rotating rake assembly receives the resistance of the slurry when the rotating rake assembly passes through the slurry, so that the vibration assembly is triggered, the slurry is uniformly dispersed under the condition that the vibration assembly generates a vibration effect on the rotating rake assembly, the slurry is prevented from adhering to the inner wall of the reaction container and the rotating rake assembly, and the recovery quality of battery materials is improved.

In order to solve the problems in the prior art, the invention provides lithium ion battery slurry recycling equipment based on rake drying, which comprises a horizontal reaction container and a rake stirring mechanism, wherein a feeding hole and a discharging hole are respectively arranged on the top surface and the bottom surface of the middle part of the reaction container, a vacuum hole is arranged at the feeding hole, a jacket is fixedly sleeved on the reaction container and positioned on two sides of the feeding hole, a heating cavity is formed between the jacket and the reaction container, the rake stirring mechanism is arranged in the reaction container, the rake stirring mechanism is provided with a rotating shaft and a rotating rake assembly, the rotating shaft is rotatably arranged in the reaction container, the rotating rake assembly is provided with a plurality of rotating rake assemblies, the rotating rake assemblies are distributed at equal intervals along the axis direction of the rotating shaft, and a vibration assembly for promoting the rotating rake assembly to play a vibration effect in the rotating process of the rotating shaft is arranged between each rotating rake assembly and the rotating shaft.

Preferably, the rotating rake assembly is provided with a shaft sleeve and a stirring rake, the shaft sleeve is fixedly sleeved on the rotating shaft, the stirring rake is of a plate-shaped structure, the stirring rakes are uniformly distributed in the circumferential direction of the shaft sleeve, the surface of each stirring rake is in a tangential connection state with the edge of the shaft sleeve, a rubber strip is fixedly connected between the end part of each stirring rake, which is close to the shaft sleeve, and the stirring rakes are in a movable connection state.

Preferably, the surface of the shaft sleeve is provided with an arc-shaped guide bar corresponding to the direction of each stirring rake, the edge of each stirring rake is provided with a clamping groove in sliding clamping connection with the guide bar, and when the stirring rake rotates along the rotating shaft and passes through battery slurry to receive the action of resistance, the stirring rake is pressed to be in a state of moving along the track direction of the guide bar.

Preferably, one end of the stirring rake close to the inner wall of the reaction container is fixedly provided with a rake tail, the rake tail is made of rubber, and the surface of the rake tail is in contact with the inner wall of the reaction container.

Preferably, the vibration assembly is provided with sliding connectors connected between each stirring rake and the shaft sleeve, a reset connector connected with the shaft sleeve is arranged between all the sliding connectors, and when one stirring rake is pressed, the other stirring rakes are in synchronous vibration states under the connection action of the reset connector.

Preferably, the sliding connecting piece is provided with a sliding rail and a supporting rod, the sliding rail is fixedly arranged on the shaft sleeve, the sliding rail is internally provided with a sliding block in a sliding manner, the supporting rod is arranged between the sliding block and the stirring rake, and two ends of the supporting rod are respectively connected with the sliding block and the stirring rake in a rotating manner.

Preferably, the reset connecting piece is provided with a rotary ring sleeve and a torsion spring, the rotary ring sleeve is coaxially sleeved on the rotating shaft, the rotary ring sleeve can rotate relative to the shaft sleeve, the torsion spring is fixedly connected between the rotary ring sleeve and the shaft sleeve and sleeved on the rotating shaft, and a connecting strip is fixedly connected between each sliding block and the rotary ring sleeve.

Preferably, a clamping block is arranged at the position of the sliding block corresponding to the connecting strip, a bayonet which is clamped with the clamping block is formed at the end part of the connecting strip, and when the sliding block slides in the sliding rail, the rotary ring sleeve follows the sliding block to be in a synchronous rotary state on the rotating shaft.

Preferably, the top and bottom surfaces of the jacket are provided with steam ports and drain ports, respectively.

The invention also provides a lithium ion battery slurry recycling method based on rake drying, which comprises the following steps:

s1, placing the battery slurry into a reaction container, vacuumizing the reaction container, and stirring, crushing and dispersing the battery slurry by using a rake stirring mechanism;

S2, heating and drying the battery slurry to separate the solvent from the solid slurry until the solvent volatilizes;

s3, discharging the solid slurry in the reaction container, and collecting the solid slurry.

Compared with the prior art, the application has the beneficial effects that: according to the application, the slurry is uniformly dispersed through stirring the slurry in the process that the rotating rake assembly follows the rotating shaft, and the rotating rake assembly is subjected to the resistance of the slurry along with the slurry passing by the rotating rake assembly, so that the vibration assembly is triggered, the slurry is uniformly dispersed under the condition that the vibration assembly generates a vibration effect on the rotating rake assembly, the slurry can be prevented from adhering to the inner wall of the reaction container and the rotating rake assembly, the effective recovery of the slurry of the lithium ion battery is realized, the recovery quality of the battery material is improved, and the overall recovery efficiency is improved.

Drawings

Fig. 1 is a schematic perspective view of a lithium ion battery slurry recycling device based on rake drying;

Fig. 2 is a perspective structural sectional view of a lithium ion battery slurry recycling apparatus based on rake drying;

FIG. 3 is a partial perspective sectional view of a lithium ion battery slurry recycling apparatus based on rake drying;

Fig. 4 is a schematic diagram of a perspective structure of a rake rotating assembly of a rake-based drying lithium ion battery slurry recycling apparatus;

Fig. 5 is a schematic diagram of a perspective structure of a rake rotating assembly of a rake-based drying lithium ion battery slurry recycling device;

fig. 6 is a plan view of a rake rotating assembly of a rake-based drying lithium ion battery slurry recovery apparatus;

Fig. 7 is a plan cross-sectional view of a rake rotating assembly of a rake-based drying lithium ion battery slurry recovery apparatus;

FIG. 8 is a partial perspective view of a rake assembly of a rake-based drying lithium ion battery slurry recovery apparatus;

FIG. 9 is an enlarged schematic view at A of FIG. 6;

fig. 10 is an enlarged schematic view at B of fig. 7.

The reference numerals in the figures are: 1. a reaction vessel; 11. a feed inlet; 12. a discharge port; 13. a vacuum port; 2. a rake stirring mechanism; 21. a rotating shaft; 22. a rake rotating assembly; 221. a shaft sleeve; 2211. a guide bar; 222. stirring rake; 2221. harrow tail; 223. a rubber strip; 3. a jacket; 31. a steam port; 32. a water outlet; 4. a vibration assembly; 41. a sliding connection; 411. a slide rail; 4111. a slide block; 412. a support rod; 42. resetting the connecting piece; 421. a rotary collar; 4211. a connecting strip; 4212. a clamping block; 422. and (3) a torsion spring.

Detailed Description

The invention will be further described in detail with reference to the drawings and the detailed description below, in order to further understand the features and technical means of the invention and the specific objects and functions achieved.

Referring to fig. 1-5, a lithium ion battery slurry recycling device based on rake drying comprises a horizontal reaction container 1 and a rake stirring mechanism 2, wherein a feeding port 11 and a discharging port 12 are respectively arranged on the top surface and the bottom surface of the middle part of the reaction container 1, a vacuum port 13 is arranged at the feeding port 11, a jacket 3 is fixedly sleeved on the reaction container 1 and positioned on two sides of the feeding port 11, a heating cavity is formed between the jacket 3 and the reaction container 1, the rake stirring mechanism 2 is arranged in the reaction container 1, the rake stirring mechanism 2 is provided with a rotating shaft 21 and a rotating rake assembly 22, the rotating shaft 21 is rotatably arranged in the reaction container 1, the rotating rake assembly 22 is provided with a plurality of rotating rake assemblies 22 which are distributed at equal intervals along the axis direction of the rotating shaft 21, and a vibration assembly 4 for promoting the rotating rake assembly 22 to play a vibration effect in the rotating process of the rotating shaft 21 is arranged between each rotating rake assembly 22 and the rotating shaft 21.

In the stirring process, the rotating shaft 21 is driven to rotate by a driving device, preferably a private motor or a stepping motor, the rake stirring mechanism 2 mixes, disperses and dries battery slurry through the rotating shaft 21 and the rake rotating assembly 22, the battery slurry enters through the feeding port 11 on the top surface of the middle part of the reaction vessel 1, the slurry can be ensured to be rapidly and uniformly distributed in the reaction vessel 1 under the action of the vacuum port 13, meanwhile, the boiling point of the slurry in the evaporation process is reduced, which means that the pressure in the reaction vessel 1 is reduced when the vacuum port 13 is used for vacuumizing, the boiling point of the evaporation process is correspondingly reduced, so that the moisture in the slurry can be removed more quickly, the drying efficiency is improved, a heating cavity in the jacket 3 outside the reaction vessel 1 can provide proper temperature through the heating device, the heat is transferred into the reaction vessel 1 through the jacket 3, and the evaporation of the solvent in the slurry is accelerated, the efficient drying of the slurry is realized, the harrow type stirring mechanism 2 plays a role of enhancing heat transfer in the process, ensures that the moisture in the slurry can be rapidly diffused to the surface of the reaction vessel 1 and evaporated, avoids the local overheating or pasting of the slurry, the rotating harrow component 22 on the rotating shaft 21 rotates along with the rotating shaft 21, scrapes and pushes the slurry to move along the inner wall of the reaction vessel 1, and uniformly disperses the slurry, and the slurry is positioned at the lower half part of the reaction vessel 1, so that the rotating harrow component 22 receives resistance from the slurry when the rotating harrow component 22 passes through the slurry, thereby triggering the vibration component 4, promoting the rotating harrow component 22 to generate a vibration effect while rotating along with the rotating shaft 21, the vibration not only can help break the agglomeration structure in the slurry, is beneficial to uniformly dispersing the slurry, but also can reduce the possibility that the slurry is adhered on the inner wall of the reaction vessel 1 and the rotating harrow component 22, and maintaining the slurry in a flowing state, improving the drying rate, and finally obtaining the uniformly dried solid slurry.

Referring to fig. 2-8, the rotating rake assembly 22 is provided with a shaft sleeve 221 and a stirring rake 222, the shaft sleeve 221 is fixedly sleeved on the rotating shaft 21, the stirring rake 222 is in a plate-shaped structure, the stirring rake 222 is provided with a plurality of stirring rakes 222 which are uniformly distributed around the circumferential direction of the shaft sleeve 221, the surface of each stirring rake 222 is in a tangential connection state with the edge of the shaft sleeve 221, a rubber strip 223 is fixedly connected between the end, close to the shaft sleeve 221, of each stirring rake 222 and the shaft sleeve 221, and the stirring rake 222 and the shaft sleeve 221 are in a movable connection state.

In the process of stirring the slurry, firstly, the rotating rake assembly 22 drives the rotating shaft 21 to rotate through the driving device, the shaft sleeve 221 serves as a connecting tie between the rotating rake assembly 22 and the rotating shaft 21, the shaft sleeve 221 is fixedly sleeved on the rotating shaft 21, the rotating rake assembly 22 can stably and synchronously rotate along with the rotating shaft 21, secondly, the stirring rakes 222 with plate-shaped structures uniformly distribute around the shaft sleeve 221 in the circumferential direction, each stirring rake 222 can stir and mix the slurry in a large range in the rotating process of the rotating shaft 21, stirring efficiency and mixing uniformity are improved, the surface of each stirring rake 222 is kept in a tangential connection state with the edge of the shaft sleeve 221, stability of the stirring rakes 222 in the rotating process is guaranteed, flexible swinging of the stirring rakes 222 in the slurry is allowed, cutting and mixing capacity of the slurry is enhanced, and as the stirring rakes 222 and the shaft sleeve 221 are connected in a movable connection state through the rubber strips 223, the vibration assembly 4 can promote the stirring rakes 222 to generate a vibration effect, the uniform dispersion degree of stirring of the slurry is improved, and adhesion of the recovered slurry is prevented.

Referring to fig. 4-9, an arc-shaped guiding strip 2211 extends on the surface of the shaft sleeve 221 corresponding to each stirring rake 222, a clamping groove is formed on the edge of each stirring rake 222 and is in sliding clamping connection with the guiding strip 2211, and when the stirring rake 222 rotates along the rotating shaft 21 and passes through battery slurry to receive resistance, the stirring rake 222 is pressed to be in a state of moving along the track direction of the guiding strip 2211.

When the rotating rake assembly 22 stirs battery slurry, the stirring rake 222 can be pressed in the rotating process due to the resistance of the slurry, at this time, when the stirring rake 222 is pressed due to the slurry resistance, the stirring rake 222 can smoothly move along the guide strip 2211, so that the motion track of the stirring rake 222 is effectively guided and restrained, the stirring rake 222 always keeps stable and efficient stirring action, and vibration can be generated under the cooperation of the vibrating assembly 4, so that the slurry can be dispersed.

Referring to fig. 3-8, a rake tail 2221 is fixedly disposed at one end of the stirring rake 222 near the inner wall of the reaction vessel 1, the rake tail 2221 is made of rubber, and the surface of the rake tail 2221 contacts with the inner wall of the reaction vessel 1.

The rubber material has the advantages that the tail 2221 is soft in texture, when the stirring rake 222 approaches or contacts the inner wall of the reaction container 1 in the high-speed rotation stirring process, severe collision or scraping cannot occur, so that the inner wall of the reaction container 1 is effectively protected from damage, the service life of the reaction container 1 is prolonged, the phenomenon that slurry adheres along the wall surface of the reaction container 1 is reduced due to the fact that the tail 2221 contacts the inner wall of the reaction container 1, the slurry is stirred more comprehensively and uniformly, stirring efficiency and mixing quality are improved, the stirring rake 222 can vibrate when the stirring rake 222 is subjected to pressure caused by the slurry, the rubber material tail 2221 provides vibration possibility for the stirring rake 222, the tail 2221 is deformed due to the fact that the tail 2221 abuts against the inner wall of the reaction container 1, and the vibration effect of the stirring rake 222 is guaranteed.

Referring to fig. 3 to 8, the vibration assembly 4 is provided with sliding connectors 41 connected between each of the agitation rakes 222 and the shaft sleeve 221, and a reset connector 42 connected with the shaft sleeve 221 is provided between all the sliding connectors 41, so that when one agitation rake 222 is pressed, the rest agitation rakes 222 are in synchronous vibration under the connection action of the reset connector 42.

When one stirring rake 222 is pressed due to the resistance of battery slurry in the stirring process, the sliding connecting piece 41 can transmit the pressure to other stirring rakes 222, all the stirring rakes 222 are moved, the reset connecting piece 42 is triggered to act simultaneously, when the stirring rakes 222 pass through the slurry, the reset connecting piece 42 plays a linkage and balance role under the condition, so that the stirring rakes 222 are reset to the original position after moving, and in a reciprocating motion state, all the stirring rakes 222 can synchronously enter a vibration state under the connection effect of the reset connecting piece 42, the vibration itself is helpful for breaking the agglomeration structure inside the slurry, all the components are dispersed and mixed more uniformly, the stirring efficiency and the mixing quality are greatly improved, and the possibility that the recovered slurry adheres to the stirring rakes 222 is reduced.

Referring to fig. 4-10, the sliding connector 41 is provided with a sliding rail 411 and a supporting rod 412, the sliding rail 411 is fixedly arranged on the shaft sleeve 221, a sliding block 4111 is slidably arranged in the sliding rail 411, the supporting rod 412 is arranged between the sliding block 4111 and the stirring rake 222, and two ends of the supporting rod 412 are respectively connected with the sliding block 4111 and the stirring rake 222 in a rotating manner.

When the stirring rake 222 receives slurry resistance during operation to generate position change relative to the shaft sleeve 221, the stirring rake 222 transmits pressure to the supporting rod 412, so that the supporting rod 412 pushes the sliding block 4111 to slide in the sliding rail 411, and further the stirring rake 222 can perform self-adaptive vibration and position adjustment within a certain range, so that the stirring rake 222 can not only keep effective transmission with the shaft sleeve 221 during stirring, but also make corresponding vibration response according to the slurry resistance change, the stirring efficiency and adaptability are greatly enhanced, and the efficient and uniform stirring of slurry is facilitated.

Referring to fig. 4-8, the reset connection member 42 is provided with a rotary ring sleeve 421 and a torsion spring 422, the rotary ring sleeve 421 is coaxially sleeved on the rotary shaft 21, the rotary ring sleeve 421 can rotate relative to the shaft sleeve 221, the torsion spring 422 is fixedly connected between the rotary ring sleeve 421 and the shaft sleeve 221 and sleeved on the rotary shaft 21, and a connecting bar 4211 is fixedly connected between each slider 4111 and the rotary ring sleeve 421.

The torsion spring 422 has the main function of providing a restoring moment after the stirring rake 222 is deflected by slurry resistance, namely when the stirring rake 222 is stressed and deviates from the original position, the torsion spring 422 accumulates elastic potential energy, and when the resistance disappears, energy is released to help the stirring rake 222 to restore to the original position, and as each sliding block 4111 is fixedly connected with the rotating ring sleeve 421 through a connecting bar 4211, when any stirring rake 222 moves due to slurry resistance, the connecting bar 4211 drives the rotating ring sleeve 421 to rotate together, so that synchronous vibration of all stirring rakes 222 under the linkage of the rotating ring sleeve 421 and under the elastic action of the torsion spring 422 is realized, the uniformity and consistency of the whole stirring effect are ensured, and the slurry dispersing effect and the flowing effect are improved. Optionally, the driving device drives the rotating shaft 21 to rotate at a variable speed, so that the resistance of the stirring rake 222 is changed, and the vibration effect of the vibration assembly 4 is further improved.

Referring to fig. 5, a clamping block 4212 is disposed on the slider 4111 at a position corresponding to the connecting bar 4211, and a bayonet is disposed at an end of the connecting bar 4211 and is clamped with the clamping block 4212, so that when the slider 4111 slides in the sliding rail 411, the rotary ring 421 is in a synchronous rotation state on the rotary shaft 21 along with the slider 4111.

When the sliding block 4111 slides along with the slurry resistance change in the sliding rail 411, the clamping block 4212 is tightly meshed with the bayonet, so that firm connection and synchronous action between the connecting bar 4211 and the sliding block 4111 are ensured, and each sliding of the sliding block 4111 in the sliding rail 411 is directly transmitted to the rotary ring sleeve 421 through the connecting bar 4211, so that the rotary ring sleeve 421 can rotate on the rotating shaft 21 along with the movement trend of the sliding block 4111, the precise matching between the sliding connecting piece 41 and the reset connecting piece 42 is ensured no matter what direction or magnitude of slurry resistance the stirring rake 222 is subjected to, the vibration of the stirring rake 222 is realized, and the overall stirring efficiency and the mixing effect are improved.

Referring to fig. 1 to 3, the top and bottom surfaces of the jacket 3 are provided with a steam port 31 and a drain port 32, respectively.

The main function of the steam port 31 is to introduce high-temperature steam into the jacket 3, heat the slurry in the reaction vessel 1 to a required working temperature through heat conduction, so that the slurry is dried, the steam circulates in the jacket 3, heat is uniformly transferred to the inner wall of the reaction vessel 1, thereby achieving the effects of precisely controlling temperature and preventing local overheating, the water outlet 32 is used for discharging condensed water, when the dried slurry is required to be cooled, the slurry can be circulated in the jacket 3 through cooling water or other cooling mediums, heat generated by the slurry is taken away, and then the cooling medium is discharged through the water outlet 32.

A lithium ion battery slurry recycling method based on rake drying is applied to lithium ion battery slurry recycling equipment based on rake drying, and comprises the following steps:

s1, placing battery slurry into a reaction container 1, vacuumizing the reaction container 1, and stirring, crushing and dispersing the battery slurry by using a rake stirring mechanism 2;

S2, heating and drying the battery slurry to separate the solvent from the solid slurry until the solvent volatilizes;

and S3, discharging the solid slurry in the reaction vessel 1, and collecting the solid slurry.

According to the invention, the slurry is uniformly dispersed through stirring the slurry in the process that the rotating rake assembly 22 follows the rotating shaft 21, and the rotating rake assembly 22 receives the resistance of the slurry along with the passing of the rotating rake assembly 22, so that the vibration assembly 4 is triggered, the slurry is uniformly dispersed under the condition that the vibration assembly 4 generates a vibration effect on the rotating rake assembly 22, the slurry can be prevented from adhering to the inner wall of the reaction container 1 and the rotating rake assembly 22, the recovery quality of battery materials is improved, and the overall recovery efficiency is improved.

The foregoing examples merely illustrate one or more embodiments of the invention, which are described in greater detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of the invention should be assessed as that of the appended claims.

Claims (5)

1. A lithium ion battery slurry recycling device based on rake drying comprises a horizontal reaction container (1) and a rake stirring mechanism (2);

the top surface and the bottom surface of the middle part of the reaction vessel (1) are respectively provided with a feed inlet (11) and a discharge outlet (12), a vacuum port (13) is arranged at the feed inlet (11), a jacket (3) is fixedly sleeved on the reaction vessel (1) and positioned at two sides of the feed inlet (11), and a heating cavity is formed between the jacket (3) and the reaction vessel (1);

The rake stirring mechanism (2) is arranged in the reaction container (1);

The device is characterized in that the harrow type stirring mechanism (2) is provided with a rotating shaft (21) and a rotating harrow assembly (22);

The rotating shaft (21) is rotatably arranged in the reaction container (1);

The plurality of rotating rake assemblies (22) are distributed at equal intervals along the axial direction of the rotating shaft (21);

a vibration component (4) for promoting the rake rotating component (22) to play a vibration effect in the rotating process of the rotating shaft (21) is arranged between each rake rotating component (22) and the rotating shaft (21);

the rotary rake assembly (22) is provided with a shaft sleeve (221) and a stirring rake (222);

the shaft sleeve (221) is fixedly sleeved on the rotating shaft (21);

The stirring rakes (222) are of plate-shaped structures, the stirring rakes (222) are multiple, the stirring rakes (222) are uniformly distributed around the circumferential direction of the shaft sleeve (221), the surface of each stirring rake (222) is in a tangential connection state with the edge of the shaft sleeve (221), a rubber strip (223) is fixedly connected between the end, close to the shaft sleeve (221), of each stirring rake (222) and the shaft sleeve (221), and the stirring rakes (222) are in a movable connection state with the shaft sleeve (221);

The vibration assembly (4) is provided with sliding connecting pieces (41) connected between each stirring rake (222) and the shaft sleeve (221), a reset connecting piece (42) connected with the shaft sleeve (221) is arranged between all the sliding connecting pieces (41), and when one stirring rake (222) is pressed, the other stirring rakes (222) are in a synchronous vibration state under the connection action of the reset connecting pieces (42);

the sliding connecting piece (41) is provided with a sliding rail (411) and a supporting rod (412), the sliding rail (411) is fixedly arranged on the shaft sleeve (221), a sliding block (4111) is arranged in the sliding rail (411) in a sliding manner, the supporting rod (412) is arranged between the sliding block (4111) and the stirring rake (222), and two ends of the supporting rod (412) are respectively connected with the sliding block (4111) and the stirring rake (222) in a rotating manner;

The reset connecting piece (42) is provided with a rotary ring sleeve (421) and a torsion spring (422), the rotary ring sleeve (421) is coaxially sleeved on the rotating shaft (21), the rotary ring sleeve (421) can rotate relative to the shaft sleeve (221), the torsion spring (422) is fixedly connected between the rotary ring sleeve (421) and the shaft sleeve (221) and sleeved on the rotating shaft (21), and a connecting strip (4211) is fixedly connected between each sliding block (4111) and the rotary ring sleeve (421);

The position of the slider (4111) corresponding to the connecting strip (4211) is provided with a clamping block (4212), the end part of the connecting strip (4211) is provided with a bayonet which is clamped with the clamping block (4212), and when the slider (4111) slides in the sliding rail (411), the rotary ring sleeve (421) is in a synchronous rotary state on the rotary shaft (21) along with the slider (4111).

2. The lithium ion battery slurry recycling device based on rake drying according to claim 1, wherein the surface of the shaft sleeve (221) extends to form an arc-shaped guide strip (2211) corresponding to the direction of each stirring rake (222), a clamping groove which is in sliding clamping connection with the guide strip (2211) is formed in the edge of each stirring rake (222), and when the stirring rake (222) rotates along the rotating shaft (21) and is subjected to resistance through battery slurry, the stirring rake (222) is pressed to be in a state of moving along the track direction of the guide strip (2211).

3. The lithium ion battery slurry recycling device based on rake drying according to claim 2, wherein a rake tail (2221) is fixedly arranged at one end of the stirring rake (222) close to the inner wall of the reaction container (1), the rake tail (2221) is made of rubber, and the surface of the rake tail (2221) is in contact with the inner wall of the reaction container (1).

4. The lithium ion battery slurry recycling apparatus based on rake drying according to claim 1, wherein the top and bottom surfaces of the jacket (3) are provided with a steam port (31) and a water discharge port (32), respectively.

5. A method for recovering lithium ion battery slurry based on rake drying, which is applied to the lithium ion battery slurry recovery device based on rake drying as set forth in any one of claims 1 to 4, and is characterized by comprising the following steps:

S1, placing the battery slurry into a reaction container (1), vacuumizing the reaction container (1), and stirring, crushing and dispersing the battery slurry by using a rake stirring mechanism (2);

S2, heating and drying the battery slurry to separate the solvent from the solid slurry until the solvent volatilizes;

S3, discharging the solid slurry in the reaction container (1), and collecting the solid slurry.