Waste lithium battery positive electrode material regeneration device

Abstract

The utility model provides a waste lithium battery positive electrode material regeneration device, the regeneration device comprises a salting-out tank, a regeneration tank, a transition pipe, a heating assembly and a spiral stirring assembly, a regeneration chamber is formed in the regeneration tank, and the regeneration chamber is communicated with one end of the transition pipe; the other end of the transition pipe is communicated with the discharge end of the salting-out tank; the spiral stirring assembly comprises a driver, a rotating plate and a plurality of propeller blade groups; the rotating plate is arranged at the bottom of the regeneration chamber; one surface of the rotating plate is connected with the driving end of the driver; the driver drives the rotating plate to rotate; the heating assembly comprises a plurality of heating rods; the heating rods are arranged on the other surface of the rotating plate at intervals; and each propeller blade group is arranged on the peripheral wall of the heating rod in a surrounding manner. According to the device, the heating assembly comprises a plurality of heating rods, and each propeller blade group is arranged on the peripheral wall of the heating rod in a surrounding manner, so that salting-out particles at the bottom of the regeneration chamber are turned and stirred, the contact time of the salting-out particles and the heating rods is prolonged, and the mixing uniformity and the sintering sufficiency of the salting-out particles are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of waste battery recycling, and in particular to a waste lithium battery positive electrode material regeneration device. Background Art

[0002] With the continuous development of lithium batteries, more and more waste lithium batteries are produced in the market, which will cause great pollution to the environment. In order to reduce the pollution of waste lithium batteries to the environment, the recycling of waste lithium batteries is particularly important.

[0003] In the recycling process of waste lithium batteries, the positive electrode materials or negative electrode materials of waste lithium batteries are generally recycled to effectively reduce the pollution of waste lithium batteries to the environment. In practice, because the cost of positive electrode materials accounts for 30%-40% of the total cost of waste lithium batteries, recycling the positive electrode materials of waste lithium batteries is of great significance.

[0004] At present, the common method for recycling the positive electrode materials of waste lithium batteries is: first, the current collector (aluminum foil) and the positive electrode active material are separated to obtain a mixture of the positive electrode materials to be processed; then the mixture of the positive electrode materials to be processed is subjected to leaching and extraction separation processes respectively to obtain the corresponding metal ions of the positive electrode materials, thereby realizing the recovery of precious metals in the positive electrode materials of the waste lithium batteries.

[0005] However, the above-mentioned recycling method of the positive electrode material of the waste lithium battery is mainly wet recycling, which has the problems of low yield and high recycling cost. Therefore, some scholars have developed a new pyrometallurgical method, as China Patent No. CN 1148241 A discloses a lithium-ion battery positive electrode material recycling and regeneration process, and specifically discloses that the crushed and ground electrode sheet is roasted for 2-3h, the active material is collected by cooling, and then the active material is leached with an acid solution to obtain an leaching solution, and then a certain proportion of elements are added to the leaching solution to obtain a precursor solution, and then the precursor solution is atomized and passed into a regeneration furnace with fuel and combustion-supporting agent to obtain a mother powder, and finally the mother powder is sieved and calcined to obtain a regenerated positive electrode material. Although the above-mentioned pyrometallurgical method can effectively solve the problems of low yield and high recycling cost of the wet recycling process, the heating tube of the conventional regeneration furnace or calcination furnace is usually located on the inner wall of the regeneration furnace or calcination furnace, which causes the powder located in the middle of the furnace body to be easily heated unevenly, that is, there is a problem of insufficient calcination of the material.

[0006] For this reason, a powder material sintering furnace such as the Chinese patent document number CN114166019A has appeared on the market, and specifically discloses that a heating device is arranged in the cylinder, and the heating device includes more than three heating tubes that are parallel to each other along the axis of the cylinder and arranged in an array on the longitudinal section of the cylinder, and the heating tubes are arranged in the heating chamber, and the heating tubes extend from one end of the cylinder to the other end, and the heating tubes are fixed to the cylinder so that each of the heating tubes rotates with the rolling of the cylinder. However, since the heating tubes of the above-mentioned powder material sintering furnace rotate with the rolling of the cylinder, that is, the tumbling and stirring of the powder material at the bottom of the cylinder is driven only by the rotation of the cylinder and the heating tubes, it is impossible to achieve rapid tumbling and stirring of the powder material at the bottom of the cylinder, resulting in the phenomenon of insufficient sintering. Utility Model Content

[0007] The purpose of the present invention is to overcome the shortcomings of the prior art and to provide a waste lithium battery positive electrode material regeneration device that can not only achieve rapid tumbling and stirring of the salting-out particles at the bottom of the regeneration chamber, but also improve the sufficient and comprehensive heat transfer between the heating rod and the salting-out particles to ensure the uniformity of the mixing and the sintering adequacy of the salting-out particles, and the rotational energy consumption of the drive is low.

[0008] The purpose of this disclosure is achieved through the following technical solutions:

[0009] A waste lithium battery positive electrode material regeneration device comprises a salting out tank, a regeneration tank, a transition pipe, a heating component and a spiral stirring component. A regeneration chamber is formed in the regeneration tank, and the regeneration chamber is connected to one end of the transition pipe.

[0010] The other end of the transition pipe is connected to the discharge end of the salting-out tank;

[0011] The spiral stirring assembly includes a driver, a rotating plate and a plurality of propeller blade groups;

[0012] The rotating plate is arranged at the bottom of the regeneration chamber, and one side of the rotating plate is connected to the driving end of the driver; the driver drives the rotating plate to rotate;

[0013] The heating assembly comprises a plurality of heating rods; each of the heating rods is arranged at intervals on the other side of the rotating plate; and each of the propeller blade groups is arranged around the outer peripheral wall of one of the heating rods.

[0014] In one embodiment, the propeller blade group includes a plurality of propeller blades, and each of the propeller blades is arranged at intervals along the length direction of the heating rod.

[0015] In one embodiment, each of the propeller blades is located on the outer peripheral wall on the same side of the heating rod.

[0016] In one embodiment, the propeller blades are distributed on the outer wall of the heating rod at equal intervals.

[0017] In one embodiment, the number of spiral turns of the propeller blade is between 1 / 5 and 1 / 2.

[0018] In one of the embodiments, the waste lithium battery positive electrode material regeneration device also includes a valve, and the valve is arranged on the transition pipe.

[0019] In one embodiment, the valve is a butterfly valve, and the number of the butterfly valves is at least two, and the butterfly valves are arranged in sequence and spaced apart along the length direction of the transition pipe.

[0020] In one of the embodiments, the waste lithium battery positive electrode material regeneration device also includes a decontamination tank, an acid leaching tank and a liquid preparation tank which are connected in sequence, and the feed end of the salting-out tank is connected to the discharge end of the liquid preparation tank.

[0021] In one embodiment, the waste lithium battery positive electrode material regeneration device, the salting-out tank also includes a salting-out liquid inlet pipe, a heating wire and an extraction pump, one end of the salting-out liquid inlet pipe is connected to the liquid distribution tank, and the other end of the salting-out liquid inlet pipe is provided with a nozzle, the nozzle is located in the salting-out tank, the extraction pump is provided on the salting-out liquid inlet pipe, and the heating wire is provided on the inner wall of the salting-out tank.

[0022] In one embodiment, the heating wire is arranged around the inner wall of the salting-out tank.

[0023] Compared with the prior art, the present invention has at least the following advantages:

[0024] 1) By rotating the rotating plate and setting it at the bottom of the regeneration chamber, and each heating rod is arranged at intervals on the rotating plate, so that multiple heating rods and the rotating plate are located at the bottom of the regeneration chamber, when the driver drives the rotating plate to rotate, it drives the multiple heating rods to rotate together, so as to realize the dual functions of stirring and heating of the multiple heating rods; at the same time, in conjunction with the use of multiple propeller blade groups, the salting-out particles coming out of the salting-out chamber at the bottom of the regeneration chamber can be pushed upward, so that the salting-out particles at the bottom of the regeneration chamber rotate and move upward, when it moves to the highest point, the salting-out particles fall back to the bottom of the regeneration chamber under the action of gravity, and so on. On the one hand, the salting-out particles at the bottom of the regeneration chamber are quickly and comprehensively tumbled and stirred, so as to ensure that the salting-out particles can be fully collided and mixed, and the uniformity of the mixing of the salting-out particles is further improved; on the other hand, the contact time between the salting-out particles and the heating rods is extended, so as to ensure that the heating rods can fully and comprehensively transfer heat to the salting-out particles, thereby ensuring the effectiveness and sufficiency of the sintering of the salting-out particles, so as to ensure that the sintering obtains a good quality of the battery positive electrode material.

[0025] 2) Compared with the traditional heating tube that rotates with the rolling of the cylinder, since the heating rod rotates with the rotating plate, there is no need to drive the entire regeneration tank to move together, which effectively reduces the rotation energy consumption of the driver.

[0026] 3) Since the other end of the transition tube is connected to the discharge end of the salting-out tank, the positive electrode material of the waste lithium battery can be regenerated without extraction and separation operations, which not only simplifies the recycling process of the positive electrode material of the waste lithium battery, but also ensures that the regenerated positive electrode material of the battery is of good quality.

[0027] 4) Since the transition pipe is additionally provided with a valve, it effectively prevents the high-temperature gas in the regeneration tank from entering the salting-out tank, which would cause the precursor solution to precipitate particles prematurely due to the high temperature in the salting-out tank, clogging the nozzle and affecting the smooth progress of the salting-out. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 This is a schematic structural diagram of a device for regenerating positive electrode materials of waste lithium batteries according to an embodiment of the utility model;

[0030] Figure 2 for Figure 1 A schematic diagram of the structure of a device for recycling positive electrode materials of waste lithium batteries in one direction;

[0031] Figure 3 for Figure 2 A cross-sectional view of a waste lithium battery positive electrode material regeneration device shown;

[0032] Figure 4 for Figure 3 A partial enlarged view shown in the middle A;

[0033] Figure 5 for Figure 3 A schematic diagram of the structure showing one direction in which the heating rod and the propeller blade assembly are connected.

[0034] Figure numerals: 10, waste lithium battery positive electrode material regeneration device; 100, regeneration tank; 110, regeneration chamber; 200, transition pipe; 210, butterfly valve; 300, heating rod; 400, spiral stirring assembly; 410, driver; 420, rotating plate; 430, propeller blade group; 431, propeller blade; 500, salting out tank; 510, salting out liquid inlet pipe; 520, nozzle; 530, extraction pump; 540, heating wire; 600, liquid preparation tank; 700, acid leaching tank; 800, impurity removal tank. DETAILED DESCRIPTION

[0035] In order to facilitate the understanding of the present disclosure, the present disclosure will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present disclosure are given in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present disclosure more thoroughly and comprehensively understood.

[0036] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present disclosure. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0038] In order to better understand the technical solutions and beneficial effects of the present invention, the present invention is further described in detail below in conjunction with specific embodiments:

[0039] like Figures 1 to 3As shown, a waste lithium battery positive electrode material regeneration device 10 of an embodiment includes a salting-out tank 500, a regeneration tank 100, a transition pipe 200, a heating component and a spiral stirring component 400, a regeneration chamber 110 is formed in the regeneration tank 100, the regeneration chamber 110 is connected to one end of the transition pipe 200, and the other end of the transition pipe 200 is connected to the discharge end of the salting-out tank 500; the spiral stirring component 400 includes a driver 410, a rotating plate 420 and a plurality of propeller blade groups 430; the rotating plate 420 is arranged at the bottom of the regeneration chamber 110, and one side of the rotating plate 420 is connected to the driving end of the driver 410; the driver 410 drives the rotating plate 420 to rotate; the heating component includes a plurality of heating rods 300; each heating rod 300 is arranged at intervals on the other side of the rotating plate 420; please refer to Figure 5 Each propeller blade set 430 is disposed around the outer peripheral wall of a heating rod 300 .

[0040] It can be understood that since the regeneration chamber 110 is formed in the regeneration tank 100, the regeneration chamber 110 can accommodate the salting-out particles, and since the regeneration chamber 110 is connected to one end of the transition tube 200, and the other end of the transition tube 200 is connected to the salting-out tank 500, the regeneration chamber 110 and the salting-out tank 500 are connected, so that the salting-out particles treated by the salting-out tank 500 can enter the regeneration tank 100. In this way, the regeneration process of the positive electrode material of the waste lithium battery can be realized without the need for extraction and separation operations, thereby simplifying the recycling process of the positive electrode material of the waste lithium battery.

[0041] Furthermore, by rotating the rotating plate 420 and setting it at the bottom of the regeneration chamber 110, and each heating rod 300 is arranged at intervals on the rotating plate 420, so that multiple heating rods 300 and the rotating plate 420 are located at the bottom of the regeneration chamber 110, when the driver 410 drives the rotating plate 420 to rotate, the multiple heating rods 300 are driven to rotate together, so that the multiple heating rods 300 can play the dual role of stirring and heating; at the same time, with the use of multiple propeller blade groups 430, the salting-out particles coming out of the salting-out chamber at the bottom of the regeneration chamber 110 can be pushed upward, so that the salting-out particles at the bottom of the regeneration chamber 110 rotate and move upward. When it moves to the highest point, The salting-out particles fall back to the bottom of the regeneration chamber 110 under the action of gravity, that is, the salting-out particles at the bottom of the regeneration chamber 110 are rapidly tumbled and stirred. In this way, the cycle is repeated continuously. On the one hand, rapid and comprehensive tumbling and stirring of the salting-out particles at the bottom of the regeneration chamber 110 is achieved, so as to ensure that the salting-out particles can be fully collided and mixed, and the uniformity of the mixing of the salting-out particles is further improved; on the other hand, the contact time between the salting-out particles and the heating rod 300 is prolonged, so as to ensure that the heating rod 300 can fully and comprehensively transfer heat to the salting-out particles, thereby ensuring the effectiveness and sufficiency of the sintering of the salting-out particles, so as to ensure that the sintering obtains a good quality battery positive electrode material.

[0042] Compared with the conventional heating tube that rotates with the rolling of the cylinder, since the heating rod 300 rotates together with the rotating plate 420, there is no need to drive the entire regeneration tank 100 to move together, which effectively reduces the rotation energy consumption of the driver 410.

[0043] like Figure 4 and Figure 5 As shown, in one embodiment, the propeller blade group 430 includes a plurality of propeller blades 431, and each propeller blade 431 is arranged at intervals along the length direction of the heating rod 300. The additional plurality of propeller blades 431 prolongs the movement distance of the salting-out particles on the outer peripheral wall of the heating rod 300, thereby prolonging the contact time between the salting-out particles and the heating rod 300, and improving the sufficiency and effectiveness of the sintering of the salting-out particles.

[0044] like Figure 5 As shown, in one embodiment, each propeller blade 431 is located on the peripheral wall on the same side of the heating rod 300. It can be understood that since each propeller blade 431 is located on the peripheral wall on the same side of the heating rod 300, each two adjacent propeller blades 431 can form multiple heating and pushing zones on the same side of the peripheral wall, and multiple mixing and falling zones are formed on the other side of the heating rod 300, so as to ensure that the salting-out particles can form multiple mixed laminar flows on the peripheral wall of the heating rod 300, so as to achieve the adequacy of the collision and mixing of the salting-out particles, and effectively avoid blocking the rapid falling of the salting-out particles due to the provision of the propeller blades 431 to affect the adequacy of the mixing of the salting-out particles.

[0045] In one embodiment, the propeller blades 431 are evenly spaced and distributed on the outer wall of the heating rod 300 to achieve uniform heating and tumbling stirring of the salting-out particles.

[0046] like Figure 5 As shown, in one embodiment, the number of spiral turns of each propeller blade 431 is between 1 / 5 and 1 / 2 turns. When the number of spiral turns of each propeller blade 431 is between 1 / 5 and 1 / 2 turns, the length of the propeller blade 431 is more appropriate, and on the premise of satisfying the rapid heating and feeding of the salting-out particles, the salting-out particles are also ensured to fall quickly, so as to achieve rapid and comprehensive tumbling and stirring of the salting-out particles, so as to better ensure the sufficiency and effectiveness of the sintering of the salting-out particles.

[0047] Specifically, the number of spiral turns of each propeller blade 431 is between 1 / 5 and 1 / 2, and can be 1 / 5, 1 / 4, 1 / 3, or 1 / 2, which can be selected by those skilled in the art according to actual conditions. In a preferred embodiment, the number of spiral turns of each propeller blade 431 is 1 / 4.

[0048] In one embodiment, the propeller blade 431 adjacent to the rotating plate 420 is connected to the rotating plate 420 to achieve more comprehensive tumbling and stirring of the salting-out particles at the bottom of the regeneration chamber 110, thereby better ensuring that good quality battery positive electrode materials are sintered.

[0049] In one embodiment, the waste lithium battery positive electrode material regeneration device 10 also includes a valve, which is arranged on the transition pipe 200, so that the added valve can effectively isolate the high-temperature gas in the regeneration tank 100 from entering the salting-out tank 500, thereby ensuring the normal progress of salting-out, and effectively preventing the high-temperature gas in the regeneration tank 100 from entering the liquid inlet pipe of the salting-out tank 500 and causing the waste lithium battery positive electrode material precursor solution to precipitate particles prematurely to block the nozzle 520 of the liquid inlet pipe.

[0050] like Figure 2 As shown, in one embodiment, the valve is a butterfly valve 210, and the number of the butterfly valves 210 is at least two, and each butterfly valve 210 is sequentially spaced along the length direction of the transition pipe 200. It can be understood that since the multiple butterfly valves 210 are sequentially spaced along the length direction of the transition pipe 200, the multiple butterfly valves 210 can well block the high-temperature gas in the regeneration tank 100 from entering the salting-out tank 500. In addition, air can be filled between each adjacent butterfly valve 210, and the filled air can better block the high-temperature gas in the regeneration tank 100 from entering the salting-out tank 500, and more effectively avoid the waste lithium battery positive electrode material precursor solution from precipitating particles prematurely due to excessive temperature in the salting-out tank 500 to block the nozzle 520 of the liquid inlet pipe.

[0051] like Figure 1 As shown, in one embodiment, the waste lithium battery positive electrode material regeneration device 10 also includes a de-impurity tank 800, an acid leaching tank 700 and a liquid preparation tank 600 which are connected in sequence, and the feed end of the salting-out tank 500 is connected with the discharge end of the liquid preparation tank 600, so that the salting-out tank 500 is connected with the liquid preparation tank 600, the acid leaching tank 700 and the de-impurity tank 800 are connected in sequence. When in use, firstly obtain the waste lithium battery positive electrode material powder, and then input the waste lithium battery positive electrode material powder into the de-impurity tank 800, turn on the heating element of the de-impurity tank 800, heat the de-impurity tank 800 to 600 degrees to 640 degrees, and effectively remove the binder, plastic and other impurities in the waste lithium battery positive electrode material powder; then, send the waste lithium battery positive electrode material powder after de-impurity to the acid leaching tank 700, and effectively remove the metal ions (Li + 、Ni 2+ 、Co 2+ , Mn 2+ etc.) and part of the conductive carbon black residue to obtain an acid leaching solution; then the acid leaching solution is sent to the liquid preparation tank 600, and then Li + 、Ni 2+ 、Co 2+ , Mn 2+Plasma liquid is used to adjust the metal ions in the acid leaching solution to obtain a precursor solution of the positive electrode material of the waste lithium battery; then, the precursor solution flows into the salting-out tank 500, and the heating wire 540 of the salting-out tank 500 is turned on at the same time, so that the salting-out tank 500 is heated to 80 degrees to 100 degrees, and the moisture in the precursor solution is effectively removed to obtain salting-out particles; then the salting-out particles flow into the regeneration tank 100, and the heating rod 300 and the driver 410 of the regeneration tank 100 are turned on at the same time, so that the regeneration chamber 110 is heated to between 950 degrees and 1500 degrees, so that the salting-out particles undergo a series of physical and chemical reactions such as growth, collision, aggregation, and dissociation at high temperature, and finally sinter into a usable battery positive electrode material, that is, the recycling and regeneration of the positive electrode material of the waste lithium battery is realized. In this way, the regeneration process can be realized without the need for extraction and separation operations, which not only simplifies the recycling process of the positive electrode material of the waste lithium battery, but also ensures that the regenerated battery positive electrode material is of good quality.

[0052] In one embodiment, the salting-out tank 500 further includes a salting-out liquid inlet pipe 510, a heating wire 540 and an extraction pump 530. One end of the salting-out liquid inlet pipe 510 is connected to the liquid preparation tank 600. A nozzle 520 is provided at the other end of the salting-out liquid inlet pipe 510. The nozzle 520 is located in the salting-out tank 500. The extraction pump 530 is provided on the salting-out liquid inlet pipe 510. The heating wire 540 is provided on the inner wall of the salting-out tank 500.

[0053] It can be understood that, since the salting-out liquid inlet pipe 510 is provided with a nozzle 520, the extraction pump 530 can spray the precursor solution on the inner wall of the salting-out tank 500, and since the heating wire 540 is provided on the inner wall of the salting-out tank 500, the heating wire 540 heats the inner wall of the salting-out tank 500, so that the water content of the precursor solution sprayed out by the nozzle 520 can be well evaporated to form salting-out particles, and the formed salting-out particles fall under the action of gravity and are temporarily stored in the salting-out tank 500. Further, the heating wire 540 surrounds the outer peripheral wall provided in the salting-out tank 500 to achieve comprehensive and rapid evaporation of the water content in the precursor solution.

[0054] In one embodiment, the heating wire 540 is disposed around the inner wall of the salting-out tank 500 , so that the heating wire 540 heats the inner wall of the salting-out tank 500 comprehensively and evenly.

[0055] Compared with the prior art, the present invention has at least the following advantages:

[0056] 1) By rotating the rotating plate 420 and setting it at the bottom of the regeneration chamber 110, and each heating rod 300 is arranged at intervals on the rotating plate 420, so that multiple heating rods 300 and the rotating plate 420 are located at the bottom of the regeneration chamber 110, when the driver 410 drives the rotating plate 420 to rotate, the multiple heating rods 300 are driven to rotate together, so as to achieve the dual functions of stirring and heating of the multiple heating rods 300; at the same time, with the use of multiple propeller blade groups 430, the salting-out particles coming out of the salting-out chamber at the bottom of the regeneration chamber 110 can be pushed upward, so that the salting-out particles at the bottom of the regeneration chamber 110 rotate and move upward at the same time Movement, when it moves to the highest point, the salting-out particles fall back to the bottom of the regeneration chamber 110 under the action of gravity, and this cycle is repeated. On the one hand, it realizes rapid and comprehensive tumbling and stirring of the salting-out particles at the bottom of the regeneration chamber 110, so as to ensure that the salting-out particles can be fully collided and mixed, and further improve the uniformity of the mixing of the salting-out particles; on the other hand, it prolongs the contact time between the salting-out particles and the heating rod 300, so as to ensure that the heating rod 300 can fully and comprehensively transfer heat to the salting-out particles, thereby ensuring the effectiveness and sufficiency of the sintering of the salting-out particles, so as to ensure that the sintering obtains good quality battery positive electrode materials.

[0057] 2) Compared with the conventional heating tube that rotates with the rolling of the cylinder, since the heating rod 300 rotates with the rotating plate 420, there is no need to drive the entire regeneration tank 100 to move together, which effectively reduces the rotation energy consumption of the driver 410.

[0058] 3) Since the other end of the transition tube 200 is connected to the discharge end of the salting-out tank 500, the waste lithium battery positive electrode material can be regenerated without extraction and separation operations, which not only simplifies the recycling process of waste lithium battery positive electrode materials, but also ensures that the regenerated battery positive electrode materials are of good quality.

[0059] 4) Since the transition pipe 200 is additionally provided with a valve, it effectively prevents the high-temperature gas in the regeneration tank 100 from entering the salting-out tank 500, causing the precursor solution to precipitate particles prematurely due to the high temperature in the salting-out tank 500, clogging the nozzle 520 and affecting the smooth progress of the salting-out.

[0060] The above-mentioned embodiments only express several implementation methods of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the patent of the present disclosure shall be based on the attached claims.

Claims

1. A waste lithium battery positive electrode material regeneration device (10), comprising a salting-out tank (500), a regeneration tank (100), a transition pipe (200), a heating component and a spiral stirring component (400), wherein a regeneration chamber (110) is formed in the regeneration tank (100), and the regeneration chamber (110) is connected to one end of the transition pipe (200), characterized in that: The other end of the transition pipe (200) is connected to the discharge end of the salting-out tank (500); The spiral stirring assembly (400) comprises a driver (410), a rotating plate (420) and a plurality of spiral blade groups (430); The rotating plate (420) is disposed at the bottom of the regeneration chamber (110), and one side of the rotating plate (420) is connected to the driving end of the driver (410); the driver (410) drives the rotating plate (420) to rotate; The heating assembly comprises a plurality of heating rods (300); each of the heating rods (300) is arranged at intervals on the other side of the rotating plate (420); and each of the propeller blade groups (430) is arranged around the outer peripheral wall of a heating rod (300).

2. The waste lithium battery positive electrode material regeneration device (10) according to claim 1, characterized in that: The propeller blade group (430) comprises a plurality of propeller blades (431), and each of the propeller blades (431) is arranged at intervals along the length direction of the heating rod (300).

3. The waste lithium battery positive electrode material regeneration device (10) according to claim 2, characterized in that: Each of the propeller blades (431) is located on the outer peripheral wall on the same side of the heating rod (300).

4. The waste lithium battery positive electrode material regeneration device (10) according to claim 2, characterized in that: The propeller blades (431) are distributed at equal intervals on the outer peripheral wall of the heating rod (300).

5. The waste lithium battery positive electrode material regeneration device (10) according to claim 2, characterized in that: The number of spiral turns of the propeller blade (431) is between 1 / 5 and 1 / 2.

6. The waste lithium battery positive electrode material regeneration device (10) according to claim 1, characterized in that: It also comprises a valve, wherein the valve is arranged on the transition pipe (200).

7. The waste lithium battery positive electrode material regeneration device (10) according to claim 6, characterized in that: The valve is a butterfly valve (210), the number of the butterfly valves (210) is at least two, and the butterfly valves (210) are arranged in sequence and at intervals along the length direction of the transition pipe (200).

8. The waste lithium battery positive electrode material regeneration device (10) according to claim 1, characterized in that: It also includes an impurity removal tank (800), an acid leaching tank (700) and a liquid preparation tank (600) which are connected in sequence, and the feed end of the salting-out tank (500) is connected to the discharge end of the liquid preparation tank (600).

9. The waste lithium battery positive electrode material regeneration device (10) according to claim 8, characterized in that: The salting-out tank (500) further comprises a salting-out liquid inlet pipe (510), a heating wire (540) and an extraction pump (530); one end of the salting-out liquid inlet pipe (510) is connected to the liquid preparation tank (600); the other end of the salting-out liquid inlet pipe (510) is provided with a nozzle (520); the nozzle (520) is located in the salting-out tank (500); the extraction pump (530) is provided on the salting-out liquid inlet pipe (510); and the heating wire (540) is provided on the inner wall of the salting-out tank (500).

10. The waste lithium battery positive electrode material regeneration device (10) according to claim 9, characterized in that: The heating wire (540) is disposed around the inner wall of the salting-out tank (500).

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