Pretreatment equipment for recycling waste lithium batteries

Abstract

The utility model discloses pretreatment equipment for waste lithium battery recycling, the pretreatment equipment for waste lithium battery recycling comprises a pulping device, the pulping device comprises a pulping main body, the pulping main body comprises a pulping cylinder and a material uniformizing plate group, the material uniformizing plate group comprises at least one first material uniformizing plate and at least one second material uniformizing plate, a plurality of first material passing holes are formed in the position, close to the circumferential wall of the pulping cylinder, of the first material homogenizing plate, and a second material passing hole which is coaxial with the pulping cylinder and corresponds to the center of the first material homogenizing plate is formed in the second material homogenizing plate. Therefore, the upper surfaces of the first material homogenizing plate and the second material homogenizing plate are used for guiding the slurry and the fluidity and gravity action of the slurry to repeatedly perform mixing operation so as to finally obtain uniformly mixed slurry, and compared with an existing stirring type material mixer, the stirring type material mixer does not need power, is energy-saving and environment-friendly, is low in operation cost, does not need to stop, and is convenient to operate. And large-batch continuous feeding can be met, and continuous mixing is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to waste lithium battery recycling technical field especially for waste lithium battery recycling's pretreatment equipment. BACKGROUND

[0002] Lithium batteries have the advantages of high energy density, wide operating temperature range and safety and reliability, and are widely used in electronic devices such as smart phones, notebook computers and electric vehicles.

[0003] In the early development of lithium batteries, due to small production and standard applicability problems, waste lithium batteries were treated as general solid waste. Since lithium batteries contain conductive agents, electrolyte and other toxic compounds, long-term exposure of waste lithium batteries to air or pollutants generated after burning will cause serious harm to the human body and the surrounding environment. With the rise of the lithium battery industry, a large number of waste lithium batteries cannot be disposed of in a simple landfill or burning manner. At the same time, due to the shortage of lithium ore resources and the large demand for lithium market, it is required that the waste lithium battery recycling technology develop rapidly.

[0004] At present, when recycling waste lithium batteries, waste lithium batteries need to be pretreated, and the pretreatment process includes crushing, separation and pulping. Among them, pulping is usually achieved by using a stirring mixer, that is, a predetermined amount of water and powder obtained after waste lithium battery treatment is introduced into the stirring cylinder, and the stirring blade is driven to rotate by a power system, and the powder and water are mixed by the stirring blade. On the one hand, the capacity of this stirring mixer is limited, and it cannot achieve continuous feeding, and the mixing efficiency is relatively low. On the other hand, after the stirring mixer completes the mixing, it needs to stop and discharge, and the working efficiency is also relatively low. In addition, the stirring mixer consumes energy when running, and the processing cost is relatively high. SUMMARY

[0005] To solve the above technical problems and achieve at least one advantage of the utility model, the utility model provides a pretreatment equipment for waste lithium battery recycling, which comprises a pulping device, and the pulping device comprises a pulping main body, and the pulping main body comprises:

[0006] A pulping cylinder has a feeding chamber and a uniform mixing chamber located at the bottom of the feeding chamber and communicating with the feeding chamber. The top end of the pulping cylinder also forms a feeding port communicating with the feeding chamber, and the feeding port is used to introduce the powder obtained after the waste lithium battery treatment into the feeding chamber. The pulping cylinder also has at least one water inlet communicating with the feeding chamber, and the water inlet is used to supply water to the feeding chamber. The slurry composed of the powder introduced by the feeding port and the water introduced by the water inlet is introduced from the feeding chamber to the uniform mixing chamber.

[0007] The even material plate group comprises at least one first even material plate and at least one second even material plate, the at least one first even material plate and the at least one second even material plate are arranged in vertical spacing in the mixing chamber, the distance between the upper surface of the first even material plate and a horizontal plane below the first even material plate gradually decreases in the direction in which the mixing chamber center extends to the side wall of the pulping cylinder, and the distance between the upper surface of the second even material plate and a horizontal plane below the second even material plate gradually increases, among the first even material plates and the second even material plates arranged in vertical spacing, a first even material plate is located at the uppermost layer, and a second even material plate is located at the lowermost layer, the first even material plate forms a plurality of first material flow holes at a position close to the peripheral wall of the pulping cylinder, and the plurality of first material flow holes correspond to the edges of the second even material plate below, the pulp liquid above the first even material plate flows downward through the first material flow holes to flow to the edges of the second even material plate below, the second even material plate forms a second material flow hole coaxial with the pulping cylinder and corresponding to the center of the first even material plate, the pulp liquid above the second even material plate flows downward through the second material flow hole to flow to the center of the first even material plate below or outside the pulping cylinder, and the second material flow hole of the second even material plate at the lowermost layer is used to discharge the mixed pulp liquid obtained by sequentially flowing to the upper of the at least one first even material plate and the at least one second even material plate arranged in spacing for mixing.

[0008] According to an embodiment of the present application, the pulping device further comprises a dividing member, the dividing member is installed above the first even material plate at the uppermost layer and corresponds to the center of the first even material plate, the dividing member corresponds to the feeding chamber, the top end of the dividing member is open and can accommodate pulp liquid, and the pulp liquid flowing from the feeding chamber to the mixing chamber is first collected in the dividing member.

[0009] According to an embodiment of the present application, the pulping device further comprises at least one mixing member, the mixing member is installed in the feeding chamber, the mixing member extends downwardly and downwardly from one side wall of the feeding chamber to the center and has a gap between the other opposite side wall of the feeding chamber, and the mixing member is located on the flow path of the powder introduced into the feeding chamber through the feeding port.

[0010] According to an embodiment of the present application, the pulping device further comprises at least one atomizing head, the atomizing head is installed in the feeding chamber and each atomizing head corresponds to one water inlet, and the atomizing head is arranged to be able to atomize water passing through the water inlet.

[0011] According to an embodiment of the present application, the pretreatment device for waste lithium battery recycling comprises a preparation device, the preparation device comprises a crushing mechanism and a separation mechanism, the crushing mechanism comprises a crusher group, the crusher group is arranged to crush the waste lithium battery into mixed material and release volatile organic compounds, wherein the mixed material comprises diaphragm fragments and powder containing copper-aluminum material and pole powder, the separation mechanism is communicated with the crusher group, the mixed material and volatile organic compounds obtained by crushing through the crusher group are introduced into the separation mechanism, the separation mechanism is arranged to separate the whole part of the powder and volatile organic compounds, diaphragm fragments and the remaining part of the powder, the feed inlet is communicated with the preparation device through a pipeline, and the powder obtained by processing through the preparation device is introduced into the pulping device.

[0012] According to an embodiment of the present application, the crusher group comprises a pulverizer, the pulverizer performs a pulverizing operation to discharge the mixed material and volatile organic compounds from the bottom thereof, the crusher group further comprises a shredder, the shredder performs shredding on the waste lithium battery to obtain the mixed material and volatile organic compounds, the shredder is adjacent to the pulverizer, and the shredder supplies the mixed material and volatile organic compounds to the pulverizer for further crushing.

[0013] According to an embodiment of the present application, the mixed material and volatile organic compounds obtained by crushing through the shredder are discharged from the bottom thereof, and the preparation device further comprises a feeder group, the feeder group comprises a first feeding piece, one end of the first feeding piece is communicated with the bottom of the shredder, and the end of the first feeding piece away from the shredder is communicated with the top of the pulverizer, and the first feeding piece is arranged to transport the mixed material and volatile organic compounds obtained by crushing through the shredder to the pulverizer.

[0014] According to an embodiment of the present application, the separation mechanism comprises a material collector, a dust removal piece and a screening piece, the bottom of the pulverizer is communicated with the top of the material collector through a pipeline, the mixed material and volatile organic compounds generated by crushing through the pulverizer are introduced into the material collector, the dust removal piece is communicated with the top end of the material collector through a pipeline, the dust removal piece is used to suck away part of the powder and volatile organic compounds in the mixed material in the material collector, the screening piece is installed at the bottom of the material collector, the screening piece is used to screen the remaining mixed material to separate diaphragm fragments and powder, and the separated powder is discharged from the bottom end of the screening piece.

[0015] According to the utility model one embodiment, the crushing mechanism still includes grinder, the top of grinder is communicated with the bottom of screening element and dust removal element through pipeline respectively, the powder material screened through screening element and the powder material sucked by dust removal element are introduced into grinder, the grinder is used for grinding powder material, the feed inlet is communicated with the bottom of grinder through pipeline, the powder material ground by grinder is discharged from the bottom and enters the feed chamber through feed inlet.

[0016] According to the utility model one embodiment, the pretreatment equipment for waste lithium battery recycling still includes two safety devices, the safety device includes gas detector and valve, the gas detector is installed on the pulverizer and the shredder, the gas detector is used for detecting the concentration of volatile organic matter in the pulverizer or the shredder, the pulverizer and the shredder are connected with protection gas supply device through pipeline and the corresponding pipeline is installed with valve, the valve is arranged to be able to adjust the flow of protection gas into the pulverizer or the shredder. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The structure schematic diagram of the pretreatment equipment for waste lithium battery recycling of the utility model is shown.

[0018] Figure 2 The structure top view of the pretreatment equipment for waste lithium battery recycling of the utility model is shown.

[0019] Figure 3 The structure schematic diagram of the pulping device of the utility model is shown.

[0020] Figure 4 The structure sectional view of the pulping device of the utility model is shown. DETAILED DESCRIPTION

[0021] The following description is used to disclose the utility model to enable those skilled in the art to realize the utility model. The preferred embodiments in the following description are only as examples, and other obvious variants can be conceived by those skilled in the art. The basic principles of the utility model defined in the following description can be applied to other implementation schemes, variant schemes, improved schemes, equivalent schemes and other technical schemes without departing from the spirit and scope of the utility model.

[0022] Those skilled in the art should understand that in the disclosure of the present application, the orientations or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the above terms cannot be understood as a limitation of the present application.

[0023] It can be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of one element can be one, and in another embodiment, the number of the element can be multiple, and the term "one" cannot be understood as a limitation on the number.

[0024] Reference Figures 1 to 4 The pretreatment equipment for recycling waste lithium batteries according to a preferred embodiment of the present application will be described in detail below, which comprises a pulping device 10 for mixing the powder obtained after processing the waste lithium batteries with water to obtain a uniformly mixed slurry for subsequent processing.

[0025] Reference Figures 3 to 4The pulp preparation device 10 comprises a pulp preparation body 11, which comprises a pulp preparation cylinder 111 and a material mixing plate set 112. The pulp preparation cylinder 111 has a material feeding chamber 11101 and a mixing chamber 11102 located at the bottom of the material feeding chamber 11101 and communicating with the material feeding chamber 11101. The top end of the pulp preparation cylinder 111 forms a material feeding port 11103 communicating with the material feeding chamber 11101, which is used to introduce powder into the material feeding chamber 11101. The pulp preparation cylinder 111 also has at least one water inlet port 11104 communicating with the material feeding chamber 11101, which is used to supply water to the material feeding chamber 11101. The material mixing plate set 112 comprises at least one first material mixing plate 1121 and at least one second material mixing plate 1122, which are arranged vertically and spaced apart in the mixing chamber 11102. In the direction in which the center of the mixing chamber 11102 extends to the side wall of the mixing chamber 11102 formed by the pulp preparation cylinder 111, the distance between the upper surface of the first material mixing plate 1121 and a horizontal plane located below it gradually decreases, and the distance between the upper surface of the second material mixing plate 1122 and a horizontal plane located below it gradually increases. Among the vertically spaced first material mixing plates 1121 and second material mixing plates 1122, one first material mixing plate 1121 is located at the uppermost layer, and one second material mixing plate 1122 is located at the lowermost layer. The first material mixing plate 1121 forms a plurality of first material flow holes 112101 near the circumferential wall of the pulp preparation cylinder 111, and each of the plurality of first material flow holes 112101 corresponds to the edge of the second material mixing plate 1122 located below it. The slurry above the first material mixing plate 1121 flows downward through the first material flow hole 112101 to flow to the edge of the second material mixing plate 1122 located below it. The second material mixing plate 1122 forms a second material flow hole 112201 coaxial with the pulp preparation cylinder 111 and corresponding to the center of the first material mixing plate 1121, through which the slurry above the second material mixing plate 1122 flows downward to flow to the center of the first material mixing plate 1121 located below it or outside the pulp preparation cylinder 111. After the slurry composed of powder introduced by the material feeding port 11103 and water introduced by the water inlet port 11104 is introduced from the material feeding chamber 11101 to the mixing chamber 11102, the slurry flows over the vertically spaced first material mixing plates 1121 and second material mixing plates 1122 in sequence. The slurry first flows to the center of the first material mixing plate 1121 and flows to its edge under the action of gravity for mixing, and the slurry first flows to the edge of the second material mixing plate 1122 and flows to its center under the action of gravity for mixing.The second material flow hole 112201 of the second material uniformizing plate 1122 at the bottom layer is used to discharge the mixed slurry in the mixing chamber 11102.

[0026] In this way, the upper surfaces of the first material uniformizing plate 1121 and the second material uniformizing plate 1122 guide the flow of the slurry and the gravity, and the mixing operation is repeated to finally obtain the mixed slurry. Compared with the existing stirring mixer, the device does not need power, is energy-saving and environmentally friendly, has low operation cost, does not need to stop, can meet the continuous feeding of large batches, realizes continuous mixing, has good mixing effect, and has higher efficiency.

[0027] Preferably, the first material uniformizing plate 1121 and the second material uniformizing plate 1122 are each provided with three. In this way, the slurry entering the mixing chamber 11102 from the feeding chamber 11101 is mixed for six times, so that the mixing effect of the finally mixed slurry is guaranteed.

[0028] Preferably, the second material flow hole 112201 gradually decreases in cross-sectional area from top to bottom, so as to guide the flow of the slurry, so that the slurry can be concentrated and guided to the center of the first material uniformizing plate 1121 arranged below the second material uniformizing plate 1122, and also facilitates the concentrated discharge of the mixed slurry.

[0029] Reference Figure 4 The pulping device 10 further comprises a uniform distribution member 12, which is installed above the first material uniformizing plate 1121 at the uppermost layer and corresponds to the center of the first material uniformizing plate 1121. The uniform distribution member 12 corresponds to the feeding chamber 11101. The top end of the uniform distribution member 12 is open and can accommodate slurry. The slurry flowing from the feeding chamber 11101 to the mixing chamber 11102 is first gathered in the uniform distribution member 12. When the slurry in the uniform distribution member 12 reaches its maximum accommodation capacity, the slurry overflows from the top end of the uniform distribution member 12 and flows down along the peripheral wall to flow above the first material uniformizing plate 1121 at the uppermost layer. In this process, the uniform distribution member 12 distributes the flow of the slurry to ensure that the slurry falling on the surface of the first material uniformizing plate 1121 at the uppermost layer is uniformly distributed near the center to prevent the mixing effect from being affected by uneven distribution of the slurry when the slurry flows to the edge. In addition, the slurry is temporarily gathered in the uniform distribution member 12, which is beneficial to mixing, and the slurry in the uniform distribution member 12 is impacted by the slurry continuously flowing to the uniform distribution member 12, so as to accelerate the mixing.

[0030] Reference Figure 4The pulp-making device 10 further comprises at least one mixing member 13, which is installed in the feeding chamber 1101. The mixing member 13 extends downwardly from a side wall of the feeding chamber 1101 and has a gap with another opposite side wall of the feeding chamber 1101. The mixing member 13 is located on the flow path of the powder introduced into the feeding chamber 1101 through the feeding port 1103. The powder introduced through the feeding port 1103 is scattered by impacting on the mixing member 13, so that the powder can be fully contacted with water.

[0031] Preferably, the water flowing through the water inlet 11104 is sprayed onto the upper surface of the mixing member 13, so that the slurry formed by the powder and water is preliminarily mixed on the upper surface of the mixing member 13. The mixing member 13 increases the contact time of the powder and water and enhances the mixing effect by blocking the powder.

[0032] Preferably, the mixing member 13 is provided with two mixing members 13, which are oppositely arranged and spaced apart by a predetermined height. The water inlet 11104 is provided with two water inlets 11104. The water flowing through the two water inlets 11104 is sprayed onto the upper surfaces of the two mixing members 13, respectively, so that the powder and water are repeatedly mixed on the upper surfaces of the two mixing members 13, thereby improving the mixing effect.

[0033] With reference to Figure 4 The pulp-making device 10 further comprises at least one atomizing head 14, which is installed in the feeding chamber 1101 and corresponds to the water inlet 11104. The atomizing head 14 is configured to atomize the water flowing through the water inlet 11104, so as to increase the contact degree of the powder and water and facilitate the mixing.

[0034] With reference to Figures 1 to 2 The pretreatment device for recycling waste lithium batteries comprises a preparation device 20, which comprises a crushing mechanism 21 and a separation mechanism 22. The crushing mechanism 21 comprises a crushing mechanism 211, which is configured to crush the waste lithium batteries into mixed materials and release volatile organic compounds. The mixed materials comprise separator fragments and powder containing copper-aluminum materials and electrode powder. The separation mechanism 22 is in communication with the crushing mechanism 211. The mixed materials and volatile organic compounds obtained by crushing through the crushing mechanism 211 are introduced into the separation mechanism 22. The separation mechanism 22 is configured to separate the whole part of the powder and volatile organic compounds, the separator fragments, and the remaining part of the powder. The feeding port 1103 is in communication with the preparation device 20 through a pipeline. The powder obtained by processing through the preparation device 20 is introduced into the pulp-making device 10 to supply the pulp-making device 10.

[0035] Preferably, the crusher group 211 comprises a shredder 2111 which performs a shredding operation to discharge the mixture and the volatile organic matter from its bottom. The bottom of the shredder 2111 is communicated with the separator group 22 through a pipeline to feed the separator group 22.

[0036] The crusher group 211 further comprises a shredder 2112 which performs a shredding operation on the waste lithium battery to obtain the mixture and the volatile organic matter. The shredder 2112 is adjacent to the shredder 2111, and the shredder 2112 supplies the mixture and the volatile organic matter to the shredder 2111 for further shredding. In this process, the waste lithium battery is successively subjected to shredding treatment, the fineness of the shredding is improved, and the working load of the shredder 2111 is reduced compared with using only the shredder 2111.

[0037] The mixture and the volatile organic matter obtained by the shredding of the shredder 2112 are discharged from its bottom. The preparation device 20 further comprises a feeder group 23 which comprises a first feeder 231, one end of which is communicated with the bottom of the shredder 2112, and the end of the first feeder 231 away from the shredder 2112 is communicated with the top of the shredder 2111. The first feeder 231 is arranged to transport the mixture and the volatile organic matter obtained by the shredding of the shredder 2112 to the shredder 2111 to automatically feed the shredder 2111 without manual transfer, which is convenient to operate.

[0038] Preferably, the first feeder 231 is implemented as a screw conveyor.

[0039] As a preferred embodiment of the above embodiment, the first feeder 231 implemented as a screw conveyor is arranged obliquely, and the low end of the first feeder 231 is communicated with the bottom of the shredder 2112, and the high end of the first feeder 231 is communicated with the top of the shredder 2111 to reduce the requirement for spatial arrangement of the shredder 2111 and the shredder 2112.

[0040] The feeder group 23 further comprises a second feeder 232, one end of which is communicated with the top end of the shredder 2112, and the second feeder 232 is arranged to drive the waste lithium battery to move to the shredder 2112 to automatically feed the shredder 2112.

[0041] Preferably, the second feeder 232 is implemented as a screw conveyor.

[0042] As a preferred embodiment of the above embodiment, the second feeding member 232 implemented as a screw conveyor is arranged obliquely, and the high end of the second feeding member 232 is communicated with the top of the shredder 2112, and the low end of the second feeding member 232 is kept at a predetermined height so as to facilitate the workers to feed materials.

[0043] The separator set 22 comprises a collector 221, a dust removal member 222 and a screening member 223. The bottom of the crusher 2111 is communicated with the top of the collector 221 through a pipeline, and the mixed materials and volatile organic compounds generated by the crushing of the crusher 2111 are introduced into the collector 221. The dust removal member 222 is communicated with the top of the collector 221 through a pipeline, and the dust removal member 222 is used to suck part of the powder and volatile organic compounds in the mixed materials in the collector 221. The screening member 223 is installed at the bottom of the collector 221, and the screening member 223 is used to screen the remaining mixed materials to separate the diaphragm fragments and the powder, and the separated powder is discharged from the bottom of the screening member 223.

[0044] Preferably, the dust removal member 222 is implemented as a pulse dust collector.

[0045] Preferably, the screening member 223 is implemented as a linear screen.

[0046] Preferably, the crushing mechanism 21 further comprises a grinding machine 212, and the top of the grinding machine 212 is communicated with the bottom of the screening member 223 and the dust removal member 222 through pipelines, respectively. The powder screened by the screening member 223 and the powder sucked by the dust removal member 222 are introduced into the grinding machine 212, and the grinding machine 212 is used to grind the powder to further reduce the particle size of the powder, facilitating subsequent pulping. The feed inlet 11103 is communicated with the bottom of the grinding machine 212 of the preparation device 20 through a pipeline, and the powder ground by the grinding machine 212 is discharged from the bottom thereof and enters the feed chamber 11101 through the feed inlet 11103.

[0047] Reference Figures 1 to 2 , the pretreatment equipment for recycling waste lithium batteries further comprises two safety devices 30, the safety device 30 comprises a gas detector 31 and a valve 32, the gas detector 31 is installed on the crusher 2111 and the shredder 2112, and the gas detector 31 is used to detect the concentration of volatile organic compounds in the crusher 2111 or the shredder 2112. The crusher 2111 and the shredder 2112 are connected to a protective gas supply device through pipelines, and the valve 32 is installed on the corresponding pipeline. The valve 32 is arranged to be able to adjust the flow of protective gas into the crusher 2111 or the shredder 2112.

[0048] Preferably, the gas detector 31 is communicatively connected with a controller, and the valve 32 is controllably connected to the controller. The gas detector 31 detects the concentration of volatile organic compounds in the shredder 2111 or the pulper 2112 and feeds back to the controller. If the controller determines that the concentration is too high, the valve 32 is controlled by the controller to increase the opening degree, so as to increase the flow rate of the protective gas and ensure the safe operation of the breaking operation. If the controller determines that the concentration is too low, the valve 32 is controlled by the controller to decrease the opening degree, so as to save the protective gas on the basis of safe breaking.

[0049] Preferably, the protective gas is one or any combination of nitrogen, carbon dioxide, helium, argon, neon, krypton and xenon.

[0050] It should be understood by those skilled in the art that the embodiments of the utility model shown in the above description and the drawings are only examples and do not limit the utility model. The advantages of the utility model have been fully and effectively realized. The function and structural principle of the utility model have been shown and explained in the embodiments, and the embodiments of the utility model can be any deformation or modification without departing from the principle.

Claims

1. A pretreatment apparatus for recycling of waste lithium batteries, characterized in that, The pretreatment device for recycling waste lithium batteries comprises a pulp preparation device, which comprises a pulp preparation body, the pulp preparation body comprises: a pulp preparation cylinder, which has a feeding chamber and a mixing chamber located at the bottom of the feeding chamber and communicating with the feeding chamber, the top end of the pulp preparation cylinder also forms a feeding port communicating with the feeding chamber, the feeding port is used to introduce the powder obtained after the treatment of waste lithium batteries into the feeding chamber, the pulp preparation cylinder also has at least one water inlet communicating with the feeding chamber, the water inlet is used to supply water to the feeding chamber, and the slurry composed of the powder introduced by the feeding port and the water introduced by the water inlet is introduced from the feeding chamber into the mixing chamber; a uniform material plate group, which comprises at least one first uniform material plate and at least one second uniform material plate, at least one first uniform material plate and at least one second uniform material plate are arranged in the mixing chamber in vertical spacing, in the direction of the mixing chamber center extending to the side wall of the pulp preparation cylinder forming the mixing chamber, the distance between the upper surface of the first uniform material plate and a horizontal plane located below it gradually decreases, and the distance between the upper surface of the second uniform material plate and a horizontal plane located below it gradually increases, among the first uniform material plates and the second uniform material plates arranged in vertical spacing, one first uniform material plate is located at the uppermost layer, and one second uniform material plate is located at the lowermost layer, the first uniform material plate forms a plurality of first material flow holes at the position close to the peripheral wall of the pulp preparation cylinder, and a plurality of first material flow holes correspond to the edge of the second uniform material plate located below, the slurry above the first uniform material plate flows downward through the first material flow hole to flow to the edge of the second uniform material plate located below, the second uniform material plate forms a second material flow hole coaxial with the pulp preparation cylinder and corresponding to the center of the first uniform material plate, the slurry above the second uniform material plate flows downward through the second material flow hole to flow to the center of the first uniform material plate located below or outside the pulp preparation cylinder, and the second material flow hole of the second uniform material plate located at the lowermost layer is used to discharge the mixed slurry obtained by sequentially flowing to the upper side of at least one first uniform material plate and at least one second uniform material plate arranged at intervals for mixing.

2. The pre-treatment apparatus for recycling of waste lithium batteries according to claim 1, wherein, The pulp preparation device further comprises a uniform distribution member, which is installed above the first uniform material plate located at the uppermost layer and corresponds to the center of the first uniform material plate, the uniform distribution member corresponds to the feeding chamber, the top end of the uniform distribution member is open and can accommodate slurry, and the slurry flowing from the feeding chamber to the mixing chamber firstly collects in the uniform distribution member.

3. The pre-treatment apparatus for recycling of waste lithium batteries according to claim 1, wherein, The pulp preparation device further comprises at least one mixing member, which is installed in the feeding chamber, the mixing member extends downwardly and obliquely from one side wall of the feeding chamber to the center and has a gap between the other opposite side wall of the feeding chamber, and the mixing member is located on the flow path of the powder introduced into the feeding chamber through the feeding port.

4. The pre-treatment apparatus for recycling of waste lithium batteries according to claim 1, wherein, The pulp preparation device further comprises at least one atomizing head, which is installed in the feeding chamber and each atomizing head corresponds to one water inlet, and the atomizing head is arranged to be able to atomize the water passing through the water inlet.

5. The pre-treatment apparatus for recycling of waste lithium batteries according to claim 1, wherein, The pretreatment device for recycling waste lithium batteries comprises a preparation device, the preparation device comprises a crushing mechanism and a separation mechanism, the crushing mechanism comprises a crusher group, the crusher group is arranged to crush the waste lithium batteries into mixed materials and release volatile organic compounds, wherein the mixed materials comprise separator fragments and powders containing copper-aluminum materials and electrode powders, the separation mechanism is in communication with the crusher group, the mixed materials and volatile organic compounds obtained by crushing in the crusher group are introduced into the separation mechanism, the separation mechanism is arranged to separate the powders, volatile organic compounds as a whole, separator fragments and the remaining powders, the feeding port is in communication with the preparation device through a pipeline, and the powders obtained by processing in the preparation device are introduced into the pulping device.

6. The pre-treatment apparatus for recycling of waste lithium batteries according to claim 5, wherein, The crusher group comprises a pulverizer, the pulverizer performs a pulverizing operation to discharge the mixed materials and volatile organic compounds from the bottom thereof, the crusher group further comprises a shredder, the shredder shreds the waste lithium batteries to obtain the mixed materials and volatile organic compounds, the shredder is adjacent to the pulverizer, and the shredder supplies the mixed materials and volatile organic compounds to the pulverizer for further crushing.

7. The pre-treatment apparatus for recycling of waste lithium batteries according to claim 6, wherein, The mixed materials and volatile organic compounds obtained by crushing in the shredder are discharged from the bottom thereof, and the preparation device further comprises a feeder group, the feeder group comprises a first feeding member, one end of the first feeding member is in communication with the bottom of the shredder, and the end of the first feeding member away from the shredder is in communication with the top of the pulverizer, and the first feeding member is arranged to transport the mixed materials and volatile organic compounds obtained by crushing in the shredder to the pulverizer. 8.The device for pre-treating waste lithium batteries for recycling according to claim 6 or 7, characterized in that, The separation mechanism comprises a collector, a dust removal member and a screening member, the bottom of the pulverizer is in communication with the top of the collector through a pipeline, the mixed materials and volatile organic compounds produced by pulverizing in the pulverizer are introduced into the collector, the dust removal member is in communication with the top of the collector through a pipeline, the dust removal member is used to suck away part of the powders and volatile organic compounds in the mixed materials in the collector, and the screening member is installed at the bottom of the collector and is used to screen the remaining mixed materials to separate the separator fragments and powders, and the separated powders are discharged from the bottom of the screening member. 9.The pre-treatment device for recycling of waste lithium batteries of claim 8, wherein, The crushing mechanism further comprises a grinder, the top of the grinder is in communication with the bottom of the screening member and the dust removal member through pipelines respectively, the powders screened in the screening member and the powders sucked away by the dust removal member are introduced into the grinder, the grinder is used to grind the powders, and the feeding port is in communication with the bottom of the grinder through a pipeline, and the powders ground by the grinder are discharged from the bottom thereof and enter the feeding chamber through the feeding port.

10. The pre-treatment apparatus for recycling of waste lithium batteries according to claim 6, wherein, The pretreatment device for recycling waste lithium batteries further comprises two safety devices, which include a gas detector and a valve, the gas detector is installed on the crusher and the shredder, and is used to detect the concentration of volatile organic compounds in the crusher or the shredder, the crusher and the shredder are connected with a protective gas supply device through pipelines, and the valve is installed on the corresponding pipeline, and the valve is arranged to be capable of adjusting the flow of the protective gas entering the crusher or the shredder.

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