CN111063958B

CN111063958B - Waste lithium ion battery recovery processing device

Info

Publication number: CN111063958B
Application number: CN201911384534.8A
Authority: CN
Inventors: 张保建
Original assignee: Gongyi Recycle Environmental Protection Equipment Co ltd
Current assignee: Gongyi Recycle Environmental Protection Equipment Co ltd
Priority date: 2019-12-28
Filing date: 2019-12-28
Publication date: 2021-06-22
Anticipated expiration: 2039-12-28
Also published as: CN111063958A

Abstract

The invention relates to the field of waste lithium ion battery recovery, in particular to a waste lithium ion battery recovery processing device which comprises a discharging device, a dispersing device, a drying device, a crushing device, a pyrolysis device, a winnowing device and a magnetic separation device which are sequentially arranged, wherein a receiving disc is arranged below a discharge hole of the magnetic separation device, so that continuous production can be realized, and the working efficiency is high.

Description

Waste lithium ion battery recovery processing device

Technical Field

The invention relates to the field of waste lithium ion battery recovery, in particular to a waste lithium ion battery recovery processing device.

Background

A lithium ion battery: is a secondary battery (rechargeable battery) that operates by mainly relying on lithium ions moving between a positive electrode and a negative electrode. During charging and discharging, Li + is inserted and extracted back and forth between two electrodes: during charging, Li + is extracted from the positive electrode and is inserted into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; the opposite is true during discharge.

The lithium ion battery has high energy density and high average output voltage. Small self-discharge, good battery, below 2% per month (recoverable). There is no memory effect. The working temperature range is-20 ℃ to 60 ℃. Excellent cycle performance, rapid charge and discharge, high charging efficiency up to 100%, and high output power. The service life is long. Does not contain toxic and harmful substances, and can be widely used.

A lithium battery is mainly composed of the following parts,

(1) the positive electrode-active material is generally lithium manganate or lithium cobaltate, lithium nickel cobalt manganese oxide material, the electric bicycle generally uses lithium nickel cobalt manganese oxide (commonly called ternary) or ternary + a small amount of lithium manganate, and pure lithium manganate and lithium iron phosphate are gradually faded out due to large volume, poor performance or high cost. The conducting electrode fluid uses electrolytic aluminum foil with the thickness of 10-20 microns.

(2) Diaphragm-a specially shaped polymer film with a microporous structure that allows lithium ions to pass freely but not electrons.

(3) The negative electrode-active substance is graphite or carbon with approximate graphite structure, and the conductive current collector uses electrolytic copper foil with the thickness of 7-15 microns.

(4) Organic electrolyte- -carbonate solvent in which lithium hexafluorophosphate is dissolved, and gel electrolyte is used as the polymer.

(5) The battery shell is divided into a steel shell (square is rarely used), an aluminum shell, a nickel-plated iron shell (used for a cylindrical battery), an aluminum-plastic film (flexible package) and the like, and also comprises a cap of the battery and is also the anode and cathode leading-out ends of the battery.

In order to effectively recover lithium ion batteries, reduce pollution and improve energy utilization rate, people research more lithium ion battery recovery methods and devices, and the method mainly comprises the following steps of discharging, crushing and sorting, wherein the batteries are discharged in a manner of being soaked in a sodium chloride solution, the discharging time is longer, generally more than 7 days, the batteries need to be drained after being discharged, continuous work cannot be realized, and in addition, the free ion concentrations of all parts of the solution are different due to different voltages of all the lithium ion batteries in the discharging process, so that the discharging efficiency is influenced.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide the waste lithium ion battery recovery and treatment device which can realize continuous production and has high working efficiency.

The invention is realized by the following technical scheme: a waste lithium ion battery recovery processing device comprises a discharge device, a dispersion device, a drying device, a crushing device, a pyrolysis device, a winnowing device and a magnetic separation device which are arranged in sequence, wherein a material receiving disc is arranged below a discharge port of the magnetic separation device,

the discharging device comprises a transverse first auger, an upward feeding hopper is arranged at the feed end of the first auger, a downward discharge port is arranged at the discharge end of the first auger, a conductive solution injection pipe is arranged at the feed end of the first auger, a liquid discharge hole is arranged at the discharge end of the first auger and is positioned on the front side of the discharge port, and a conductive solution circulating device is arranged between the liquid discharge hole and the conductive solution injection pipe;

the dispersing device comprises a transverse second packing auger, the feed end of the second packing auger corresponds to the discharge end of the first packing auger, the feed end of the second packing auger is provided with an air inlet pipe, and the discharge end of the second packing auger is provided with a drain hole;

the drying device comprises a first conveying belt, a working belt of the first conveying belt is a mesh belt, the first conveying belt is covered with a steam collecting cover, the steam collecting cover is connected with an exhaust fan, and the first conveying belt is connected with a heating device;

the crushing device comprises a crusher, a feed inlet of the crusher corresponds to the discharge end of the first conveying belt, and the upper end of the crusher is connected with a first cyclone dust collector;

the pyrolysis device comprises a low-temperature pyrolysis furnace, an exhaust port of the low-temperature pyrolysis furnace is connected with a first collecting tank, the first collecting tank is connected with a second cyclone dust collector, and a slag discharging port of the low-temperature pyrolysis furnace is connected with a slag discharging pipe;

the air separation device comprises an air separator, a feed inlet of the air separator is hermetically communicated with the slag discharge pipe, and a discharge outlet of the air separator is connected with a second collecting tank;

the magnetic separation device comprises a magnetic separator, wherein a feed inlet of the magnetic separator is connected with a slag hole of the air separator, and the take-up reel comprises a steel shell take-up reel arranged at the discharge hole of the magnetic separator and positive and negative plate take-up reels arranged at the slag hole of the magnetic separator.

Further, the first auger comprises a first barrel, a first connecting seat is coaxially arranged at the first end of the first barrel, a main shaft of the first auger penetrates through the first connecting seat to be connected with a driving motor, a second barrel is coaxially arranged in the first barrel in a penetrating manner, a working part of the first auger is arranged in the second barrel in a penetrating manner, the second barrel points to an end opening of the first connecting seat, a sealing device matched with a main shaft of the first auger is arranged in the first connecting seat, the sealing device is sealed with the opening of the second barrel, a second connecting seat is coaxially arranged at the second end of the first barrel, the second connecting seat and the second barrel are elastically compressed, a conductive solution injection interface is arranged above the feeding end of the second barrel, the conductive solution injection pipe is detachably communicated with the conductive solution injection interface, and a through hole is arranged on the first barrel at a position corresponding to the conductive solution injection interface, the sealed flowing back funnel that is provided with downwards of flowing back hole department, the discharge gate of first auger is including setting up the rectangular mouth at second barrel discharge end, rectangular mouth department is provided with the discharging pipe, second barrel surface is provided with insulating paint.

Furthermore, the inner wall of the first cylinder body is provided with guide support rods, and the guide support rods are distributed on the lower side of the second cylinder body.

Further, the conductive solution circulating device comprises a sedimentation tank, an anticorrosive layer is arranged on the inner wall of the sedimentation tank, a cover body is arranged at the upper end of the sedimentation tank, a material supplementing opening is formed in the cover body, a transverse grid plate is arranged at the middle position of the sedimentation tank, the lower end of the funnel extends to the lower side of the grid plate through a pipeline, and a conductive solution injection pipe is communicated to the upper portion of the sedimentation tank through a pipeline and a circulating pump.

Further, the low temperature pyrolysis oven includes the base, be provided with the third auger on the base, the third auger is provided with the heat preservation intermediate layer outward, heat preservation intermediate layer and air heater intercommunication, the feed end of third auger is provided with ascending cooling inlet pipe, the scum pipe is the cooling discharging pipe, the discharge end of third auger is provided with ascending gas vent, and the gas vent intercommunication has the heat preservation outlet duct, the inlet end of heat preservation outlet duct is provided with the filter screen, the end of giving vent to anger of heat preservation outlet duct is provided with first collection tank, first collection tank is provided with cooling device.

Further, cooling inlet pipe and cooling discharging pipe all include the stainless steel body, the external cover of stainless steel body is equipped with first cooling spiral pipe, first holding tank includes the stainless steel jar body, cooling device includes the external second cooling spiral pipe of suit at the stainless steel jar.

Further, heating device is including setting up the heating pipe between the process end and the return stroke end of first conveyer belt, and the heating pipe has many, and many heating pipes transversely set up side by side, and intercommunication between two adjacent heating pipes, the heating pipe distribution density who is close to first conveyer belt feed end is greater than the heating pipe distribution density who keeps away from first conveyer belt feed end.

The invention has the beneficial effects that: waste lithium ion battery recovery unit, set up the discharge apparatus, the dispersing device, the drying plant, the reducing mechanism, the pyrolysis apparatus, the winnowing device, and the magnetic separation device, can realize discharging, dispersing, drying, pulverizing, pyrolyzing, winnowing, magnetic separation step continuously, wherein the pyrolysis separates the organic component, the winnowing can winnowing the powder material of the positive pole, negative pole, the magnetic separation can separate the outer casing, last to positive plate aluminium and negative plate copper, it is convenient to separate, through the way of charging conductive solution in the first auger, discharge in the course of transporting, can save the recovery cycle effectively, stir lithium ion battery and conductive solution in the course of transporting, can make the ionic concentration of conductive solution even, and then improve the discharge speed, through the conductive solution circulating device, can realize the cyclic utilization of conductive solution, set up dispersing device and drying device, can disperse lithium ion battery after discharging and accomplish, increase the clearance between the lithium ion battery, drying rate accelerates, practices thrift man-hour, sets up drying device, and drying that can be quick through dispersion, dry back, lithium ion battery surface cleaning, each part raw materials is pure, and the convenience is at the categorised extraction of the in-process of separation recovery.

Drawings

FIG. 1 is a schematic diagram showing the connection relationship between devices in embodiment 1;

FIG. 2 is a schematic view showing the connection relationship of the discharge device, the dispersing device and the drying device;

FIG. 3 is a schematic view showing the connection relationship of the pulverizing device, the pyrolysis device, the air separation device and the magnetic separation device;

FIG. 4 is a schematic view of a first packing auger in a front sectional view;

FIG. 5 is a schematic view of a first barrel structure;

FIG. 6 is a schematic view of a low temperature pyrolysis furnace in cross section;

wherein: 1-a discharge device, 101-a liquid discharge funnel, 102-a discharge pipe, 103-a first cylinder, 104-a second cylinder, 105-a conductive solution injection interface, 106-a driving motor, 107-a connecting sleeve, 108-a main shaft of a first packing auger, 109-a first connecting seat, 110-a second connecting seat, 111-a nylon sealing plate, 112-a silica gel sealing plate, 113-a liquid discharge hole, 116-a guide supporting rod, 117-a rubber pad, 118-a notch, 201-a conductive solution injection pipe, 202-a circulating pump, 203-a sedimentation tank, 204-a grid plate, 205-a cover body, 3-a second packing auger, 401-a first conveying belt, 402-a steam collection cover, 403-a heating pipe, 5-a lifting packing auger, 6-a crusher, 7-a low-temperature pyrolysis furnace, 701-a first collecting tank, 702-a base, 703-a third auger, 704-a heat preservation interlayer, 705-a cooling feed pipe, 706-a cooling discharge pipe, 707-a heat preservation air outlet pipe, 708-a first cooling spiral pipe, 709-a second cooling spiral pipe, 710-a second cyclone dust collector, 8-a winnowing machine, 801-a second collecting tank, 9-a magnetic separator, 10-a steel shell connecting disc, 11-a positive and negative plate connecting disc and 12-a first cyclone dust collector.

Detailed Description

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

As shown in fig. 1-6, a waste lithium ion battery recovery processing device, including discharge device 1, dispersion devices, drying device, reducing mechanism, pyrolysis device, wind selector and the magnetic separation device that installs in proper order, the take-up (stock) pan is installed to magnetic separation device's discharge gate below, through discharge device, dispersion devices, drying device, reducing mechanism, pyrolysis device, wind selector and magnetic separation device, can be continuous realization discharge, dispersion, drying, smash, pyrolysis, selection by winnowing, the magnetic separation step, with low costs, convenient control, need not transport.

Wherein the content of the first and second substances,

the discharging device comprises a transverse first auger, an upward feeding hopper is installed at the feed end of the first auger, a downward discharge port is formed at the discharge end of the first auger, a conductive solution injection pipe 201 is connected to the feed end of the first auger, a liquid discharge hole 113 is formed in the discharge end of the first auger and is located on the front side of the discharge port, and a conductive solution circulating device is installed between the liquid discharge hole and the conductive solution injection pipe.

Specifically, the first auger comprises a first barrel 103, a first connecting seat 109 is coaxially installed at a first end of the first barrel, a main shaft 108 of the first auger penetrates through the first connecting seat to be connected with a driving motor 106, a second barrel 104 is coaxially installed in the first barrel in a penetrating manner, a working part of the first auger is installed in the second barrel in a penetrating manner, the second barrel points to an end opening of the first connecting seat, a sealing device matched with the main shaft of the first auger is installed in the first connecting seat, and the sealing device is sealed with the opening of the second barrel. Specifically, a rubber pad 117 is arranged between the second cylinder and the second connecting seat, for better positioning, an outwardly convex bearing seat is arranged at one end of the second cylinder corresponding to the second connecting seat, a groove corresponding to the bearing seat is processed at the bottom of the second connecting seat, a conductive solution injection interface 105 is arranged above the feeding end of the second cylinder, a conductive solution injection pipe is detachably communicated with the conductive solution injection interface, a through hole is processed at the position of the first cylinder corresponding to the conductive solution injection interface for convenient installation, a downward liquid discharge funnel 101 is hermetically welded at the liquid discharge hole, a discharge hole of the first auger comprises a long strip opening processed at the discharge end of the second cylinder, a discharge pipe 102 is hermetically welded at the long strip opening, the outer surface of the second cylinder is coated with insulating paint, a guide support rod 116 is welded on the inner wall of the first cylinder, and the guide support rods are distributed at the lower side of the second cylinder, conductive solution circulating device includes sedimentation tank 203, and sedimentation tank inner wall processing has the anticorrosive coating, specifically is the portland cement layer, has fine anticorrosive effect, and lid 205 is installed to the sedimentation tank upper end, installs the feed supplement mouth on the lid, and horizontal comb board 204 is installed to the sedimentation tank intermediate position, and the funnel lower extreme passes through the pipeline and extends to the comb board below, and the conductive solution filling tube passes through pipeline and circulating pump 202 intercommunication to sedimentation tank upper portion.

In this embodiment, the first auger is connected with a driving motor through a connecting sleeve 107, the output rotation speed is reduced to 0.5rpm through a speed reducer, the rotation speed is low, the length of the first auger and the pitch of a helical blade are designed, the conveying time of the first auger is controlled to be 6-9h, the conductive solution is 20-22% sodium chloride solution, the conductive solution has better conductivity, and can avoid crystallization precipitation in the discharging process of a battery, the first cylinder, the first connecting seat and the second connecting seat are connected through flanges, and are positioned through a positioning pin, the installation is convenient, as electroerosion can occur in the discharging process, the second cylinder is easy to damage, the second cylinder, the conductive solution injection interface, the liquid discharge funnel and the discharge pipe are welded and prefabricated in a sealing manner, then insulating paint is coated, the insulating paint is inserted into the first cylinder through the guide supporting rod, and for convenient installation, an opening 118 is processed on the first cylinder, the gap can not only make room for the liquid discharge funnel and the liquid discharge pipe, but also guide to ensure that the injection interface of the conductive solution is just opposite to the through hole, the open end of the second cylinder is inserted into the silica gel sealing plate through the elastic action of the rubber gasket to realize sealing, because the silica gel sealing gasket has insulation and better corrosion resistance, and also has better elasticity, so that sealing can be realized, after the installation is completed, 20-22% sodium chloride solution is injected into the sedimentation tank, then the sodium chloride solution is injected into the second cylinder through the conductive solution injection pipe, the sodium chloride solution flows out from the liquid discharge hole in the second cylinder, the solute of the conductive solution can be uniform through the stirring of the first auger and the self flow of the conductive solution, the discharge process is accelerated, the throwing density of the lithium ion battery is high, the cost can be reduced, the efficiency is improved, and the lithium ion battery can be fully discharged through the discharge of 6-, when can add sodium chloride or clear water through the feed supplement mouth, and then control sodium chloride solution concentration, dispersion devices includes horizontal second auger 3, and the feed end of second auger corresponds with the discharge end of first auger, and the feed end of second auger is connected with the air-supply line, and the discharge end processing of second auger has the wash port, through the dispersion in the second auger transportation process, can make further separation of lithium ion battery, avoids gluing, provides the basis for the drying on next step.

Drying device includes first conveyer belt 401, and the working tape of first conveyer belt is the guipure, and first conveyer belt is covered with steam and collects cover 402, and steam is collected the cover and is connected with the exhaust fan, and first conveyer belt is connected with heating device, and drying device, drying that can be quick, through dispersion, dry back, lithium ion battery surface cleaning, each part raw materials is pure, and the convenient classification at the in-process of separation recovery draws.

For better utilization resource, the steam is collected the cover upper end and is passed through the exhaust fan and communicate to the air-supply line of second auger, because the steam that the cover was collected to the steam still has higher temperature, carry to the second auger in, preheat lithium ion battery, the process of drying with higher speed, the outlet through the second auger is got rid of after the partial moisture in the water and the vapor of leaching condenses, for improving the effect, can also increase booster fan between exhaust fan and air-supply line, improve the vapor flow rate.

The crushing device comprises a crusher 6, a feed inlet of the crusher corresponds to a discharge end of the first conveying belt, the upper end of the crusher is connected with a first cyclone dust collector 12, the crusher crushes the lithium ion battery to a particle size of 3-4mm, and the first cyclone dust collector can collect loss powder generated by crushing.

The pyrolysis device comprises a low-temperature pyrolysis furnace 7, an exhaust port of the low-temperature pyrolysis furnace is connected with a first collecting tank 701, the first collecting tank is connected with a second cyclone dust collector 710, a slag discharge port of the low-temperature pyrolysis furnace is connected with a slag discharge pipe, concretely, the low-temperature pyrolysis furnace comprises a base 702, a third packing auger 703 is installed on the base, a heat insulation interlayer 704 is installed outside the third packing auger, the heat insulation interlayer is communicated with a hot air blower, an upward cooling feed pipe 705 is installed at a feed end of the third packing auger, a downward slag discharge pipe is installed at a discharge end of the third packing auger, the slag discharge pipe is a cooling discharge pipe 706, an upward exhaust port is processed at a discharge end of the third packing auger, the exhaust port is communicated with a heat insulation air outlet pipe 707, a filter screen 711 is installed at an air inlet end of the heat insulation air outlet pipe, an air outlet end of the heat insulation air outlet pipe is, the temperature of control in the third auger is 400 + 420 ℃, pyrolyzes the diaphragm into macromolecule gaseous state loss, through the heat preservation outlet duct, can avoid macromolecule gathering to adhere on the pipe wall, and the heat preservation outlet duct includes the body, and the outer cladding heat preservation of body, macromolecule gas get into first collection tank after the cooling condense, and the discharge end of heat preservation outlet duct inserts to first collection tank bottom, and the air inlet of second cyclone is connected with the filter.

The cooling feed pipe and the cooling discharge pipe both comprise stainless steel pipes, a first cooling spiral pipe 708 is sleeved outside the stainless steel pipes, the cooling device comprises a second cooling spiral pipe 709 sleeved outside the stainless steel tank, the heating device comprises a heating pipe 403 arranged between the process end and the return end of the first conveying belt, the heating pipes are provided with a plurality of heating pipes, the plurality of heating pipes are transversely arranged side by side and communicated with each other, the distribution density of the heating pipes close to the feed end of the first conveying belt is greater than that of the heating pipes far away from the feed end of the first conveying belt, because the lithium ion battery at the feed end contains more water and the density of the heating pipe is high, the drying efficiency can be improved, and the inlet end of the heating pipe is arranged at the feed end of the first conveying belt, so that the air outlets of the first cooling spiral pipe and the second cooling spiral pipe are communicated with the inlet end of the heating pipe through a pipeline fan for better energy conservation.

The winnowing device comprises a winnowing machine 8, a feed inlet of the winnowing machine is communicated with the slag discharge pipe in a sealing mode, a discharge outlet of the winnowing machine is connected with a second collecting tank 801, and powder materials of the anode and the cathode can be winnowed by winnowing.

The magnetic separation device comprises a magnetic separator 9, a feed inlet of the magnetic separator is connected with a slag hole of the air separator, a receiving disc comprises a steel shell receiving disc 10 arranged at the discharge hole of the magnetic separator and positive and negative plate receiving discs 11 arranged at the slag hole of the magnetic separator, the shell can be separated by magnetic separation and falls into the steel shell receiving disc, the last aluminum and the copper of the positive plate fall into the positive and negative plate receiving discs, the melting points of the copper and the aluminum are different, and the copper and the aluminum are separated by melting.

In order to facilitate conveying, the drying device and the crusher, and the winnowing machine and the magnetic separator are connected through a lifting auger.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. A waste lithium ion battery recovery device is characterized by comprising a discharge device, a dispersion device, a drying device, a crushing device, a pyrolysis device, a winnowing device and a magnetic separation device which are arranged in sequence, wherein a receiving disc is arranged below a discharge port of the magnetic separation device,

the magnetic separation device comprises a magnetic separator, a feed inlet of the magnetic separator is connected with a slag outlet of the air separator, the take-up pan comprises a steel shell take-up pan arranged at the discharge outlet of the magnetic separator and positive and negative plate take-up pans arranged at the slag outlet of the magnetic separator,

the first auger comprises a first barrel, a first connecting seat is coaxially arranged at the first end of the first barrel, a main shaft of the first auger penetrates through the first connecting seat and is connected with a driving motor, a second barrel is coaxially arranged in the first barrel in a penetrating manner, a working part of the first auger is arranged in the second barrel in a penetrating manner, the second barrel points to an end opening of the first connecting seat, a sealing device matched with the main shaft of the first auger is arranged in the first connecting seat and is sealed with the opening of the second barrel, a second connecting seat is coaxially arranged at the second end of the first barrel, the second connecting seat and the second barrel are elastically pressed, a conductive solution injection interface is arranged above the feed end of the second barrel, a conductive solution injection pipe is detachably communicated with the conductive solution injection interface, and a through hole is arranged on the first barrel at a position corresponding to the conductive solution injection interface, the sealed flowing back funnel that is provided with downwards of flowing back hole department, the discharge gate of first auger is including setting up the rectangular mouth at second barrel discharge end, rectangular mouth department is provided with the discharging pipe, second barrel surface is provided with insulating paint.

2. The waste lithium ion battery recycling device according to claim 1, wherein the inner wall of the first cylinder is provided with guide support rods, and the guide support rods are distributed on the lower side of the second cylinder.

3. The waste lithium ion battery recovery device according to claim 1, wherein the conductive solution circulation device comprises a sedimentation tank, an anticorrosive layer is arranged on the inner wall of the sedimentation tank, a cover body is arranged at the upper end of the sedimentation tank, a feeding port is arranged on the cover body, a transverse grid plate is arranged at the middle position of the sedimentation tank, the lower end of the funnel extends to the lower part of the grid plate through a pipeline, and the conductive solution injection pipe is communicated to the upper part of the sedimentation tank through a pipeline and a circulation pump.

4. The waste lithium ion battery recycling device according to claim 1, wherein the low-temperature pyrolysis furnace comprises a base, a third auger is arranged on the base, a heat preservation interlayer is arranged outside the third auger, the heat preservation interlayer is communicated with an air heater, an upward cooling inlet pipe is arranged at a feed end of the third auger, the slag discharge pipe is a cooling discharge pipe, an upward exhaust port is arranged at a discharge end of the third auger, a heat preservation outlet pipe is communicated with the exhaust port, a filter screen is arranged at an air inlet end of the heat preservation outlet pipe, a first collecting tank is arranged at an air outlet end of the heat preservation outlet pipe, and a cooling device is arranged on the first collecting tank.

5. The waste lithium ion battery recovery device according to claim 4, wherein the cooling feed pipe and the cooling discharge pipe each comprise a stainless steel pipe body, a first cooling spiral pipe is sleeved outside the stainless steel pipe body, the first collection tank comprises a stainless steel tank body, and the cooling device comprises a second cooling spiral pipe sleeved outside the stainless steel tank body.

6. The waste lithium ion battery recycling device of claim 1, wherein the heating device comprises a plurality of heating pipes disposed between the process end and the return end of the first conveyor belt, the plurality of heating pipes are disposed side by side in a transverse direction, two adjacent heating pipes are communicated with each other, and the distribution density of the heating pipes near the feeding end of the first conveyor belt is greater than that of the heating pipes far away from the feeding end of the first conveyor belt.