Lithium battery electrolyte evaporation and organic matter pyrolysis integrated furnace and treatment method

Abstract

The invention discloses a lithium battery electrolyte evaporation and organic matter pyrolysis integrated furnace and a treatment method, and belongs to the technical field of lithium battery recovery. The lithium battery electrolyte evaporation and organic matter pyrolysis integrated furnace comprises a furnace body, a heating piece, a furnace tube, a first exhaust hopper and a second exhaust hopper, and the furnace tube is arranged in the furnace body; the furnace tube is sequentially divided into a drying area, a transition area and a pyrolysis area from the feeding end to the discharging end; the drying area and the pyrolysis area are separated by the transition area; and a plurality of grids are arranged in the furnace tube area corresponding to the transition area. The invention further provides a treatment method of the lithium battery electrolyte evaporation and organic matter pyrolysis integrated furnace. The treatment method comprises the steps that the shredded lithium battery broken materials firstly enter the drying area of the furnace tube; materials enter the pyrolysis zone after passing through the transition zone, and organic matters in the materials are pyrolyzed into small molecular substances in the pyrolysis zone. According to the rotary furnace provided by the invention, electrolyte evaporation and organic matter pyrolysis are realized in one rotary furnace zone, and the black powder recovery rate is high.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery recycling, and in particular to a lithium battery electrolyte evaporation and organic matter pyrolysis integrated furnace and a treatment method. Background Art

[0002] At present, the lithium battery recycling process often uses a rotary kiln to dry and pyrolyze the shredded battery materials, so as to evaporate and remove the electrolyte in the shredded materials, and to pyrolyze to remove the battery separators, adhesives and other organic substances in the shredded materials. A rotary kiln is also used to directly perform pyrolysis to remove the electrolyte, separators, adhesives and other organic substances in the shredded materials, so as to facilitate the separation of the positive / negative electrode powder and the aluminum foil / copper foil current collector, which is beneficial to the subsequent crushing, sorting and recycling of black powder, copper, aluminum, casing, etc.

[0003] For the two process steps of drying and pyrolysis, some disclosed technologies use two rotary kilns: one for low-temperature drying and the other for high-temperature pyrolysis; some use one rotary kiln directly for pyrolysis.

[0004] For example, the patent CN202310824175.3 disclosed by Guangdong Lianzhiguan Environmental Protection Technology Co., Ltd.: A battery full-process crushing, sorting and recycling system and method, including a low-temperature drying system and a high-temperature pyrolysis system: The low-temperature drying system is used to dry the shredded materials and treat the electrolyte; the high-temperature pyrolysis system is used to heat treat light materials and organic matter.

[0005] For example, the patent CN202411194972.9 disclosed by Anhui Farnlight New Energy Technology Co., Ltd.: A lithium battery electrolyte drying and black powder separation equipment and separation method, including a low-temperature furnace for volatilizing the electrolyte of lithium battery fragments and a high-temperature cracking furnace for carbonizing the diaphragm material and glue on the surface of the lithium battery fragments.

[0006] The two rotary kilns achieve low-temperature drying and high-temperature pyrolysis respectively, which is conducive to the independent control of each process and the independent treatment of tail gas. The process effect is good and can be called a "two-step method". However, the technology requires too much investment, occupies too much space, has too long a process, and has too high operating costs, which limits its technical and economic performance.

[0007] The technology of directly pyrolyzing shredded materials in a rotary kiln can be called a "one-step process".

[0008] For example, patent CN202310019229.9 disclosed by Jerry Environmental Technology Co., Ltd. is used for a rotary kiln and processing system for lithium batteries, which uses a rotary furnace to complete the thermal decomposition of lithium battery shreds.

[0009] For example, patent CN202320337519.3 disclosed by Nanjing Weigang Machinery Technology Co., Ltd. is a rotary kiln dryer for pyrolysis treatment of waste lithium batteries, which completes the pyrolysis process on a rotary kiln.

[0010] For example, patent CN202121619408.9 disclosed by Hunan Jiangye Mechanical and Electrical Technology Co., Ltd. is a rotary furnace specially used for pyrolysis of waste lithium-ion batteries, which completes pyrolysis on a rotary furnace.

[0011] Direct pyrolysis in a rotary furnace completes the two processes of drying and pyrolysis, with less investment, less floor space, shorter process, lower operating cost, and better technical and economic performance. However, in the above technical solutions, the exhaust is concentrated from one exhaust port. Since the gas generated by pyrolysis is complex, containing both electrolyte vapor and small molecular organic matter, HF, black powder and other components, the exhaust pipe is easily blocked, the pyrolysis gas takes away too much black powder, and the electrolyte vapor has many impurities, resulting in reduced production efficiency, reduced black powder yield, and reduced economic performance. At the same time, the electrolyte content in lithium batteries is about 15%, including organic matter such as diethyl carbonate and ethyl methyl carbonate, which have a low flash point. Directly pyrolyzing the shredded material containing electrolyte is highly dangerous and has the risk of combustion and explosion, which needs to be solved urgently. Summary of the invention

[0012] The purpose of the present invention is to overcome the above-mentioned technical deficiencies, provide an integrated furnace and treatment method for lithium battery electrolyte evaporation and organic matter pyrolysis, and solve the technical problem in the prior art that pyrolysis in a rotary furnace carries away too much black powder, resulting in a low black powder yield.

[0013] In order to achieve the above technical objectives, the technical solution of the present invention provides a lithium battery electrolyte evaporation and organic matter pyrolysis integrated furnace, comprising a furnace body, a heating element, a furnace pipe, a first exhaust hopper and a second exhaust hopper, wherein the furnace pipe is arranged in the furnace body, and the heating element is arranged between the furnace pipe and the furnace body;

[0014] The furnace tube is divided into a drying zone, a transition zone and a pyrolysis zone from the feed end to the discharge end; the transition zone separates the drying zone from the pyrolysis zone;

[0015] A plurality of grilles are arranged in the furnace tube area corresponding to the transition zone, and the plurality of grilles are used to block the airflow from passing through the transition zone and allow the material to pass through the transition zone;

[0016] The first exhaust hopper is arranged at the end where the feed inlet of the furnace tube is located;

[0017] The second exhaust hopper is arranged at the end where the discharge port of the furnace tube is located.

[0018] In any embodiment, a plurality of the grids are alternately arranged up and down in the furnace tube to form a spiral channel or an S-shaped channel.

[0019] In any embodiment, one end of the grille away from the inner wall of the furnace tube extends to be opposite to the side wall of the adjacent grille.

[0020] In any embodiment, the number of the grids is 2 or more.

[0021] In any embodiment, the heating element is arranged on the outer wall of the furnace tube corresponding to the drying zone and the pyrolysis zone.

[0022] In any embodiment, it also includes a feeding mechanism, which includes a feeding bin and a conveyor, the bottom of the feeding bin is connected to the top of the conveyor, the discharge port of the conveyor is connected to the feeding port of the furnace tube, and the first exhaust hopper is arranged between the feeding bin and the furnace body.

[0023] In any embodiment, it further comprises a discharge bin, wherein the discharge bin is connected to the discharge port of the furnace tube, and the second exhaust hopper is arranged on the top of the discharge bin.

[0024] In any embodiment, the temperature of the drying zone is 120°C-250°C, and the temperature of the pyrolysis zone is 400°C-600°C.

[0025] In any embodiment, it further includes a first air inlet pipe and a second air inlet pipe, wherein the first air inlet pipe is connected to a drying area of ​​the furnace tube, and the second air inlet pipe is connected to a pyrolysis area of ​​the furnace tube.

[0026] In any embodiment, a third air inlet pipe is further included, wherein the third air inlet pipe is communicated with the transition zone of the furnace tube.

[0027] In addition, the present invention also proposes a treatment method of a lithium battery electrolyte evaporation and organic matter pyrolysis integrated furnace, comprising the following steps:

[0028] The shredded lithium battery crushed materials first enter the drying area of ​​the furnace tube, where the electrolyte in the lithium battery crushed materials is evaporated, and the electrolyte vapor is discharged from the first exhaust hopper;

[0029] After passing through the transition zone, the material enters the pyrolysis zone, where the organic matter in the material is pyrolyzed into small molecular substances, and the pyrolysis gas of the organic matter is discharged from the second exhaust hopper.

[0030] Compared with the prior art, the beneficial effects of the present invention include: the lithium battery electrolyte evaporation and organic matter pyrolysis integrated furnace proposed in the present invention comprises a furnace body, a heating element, a furnace tube, a first exhaust hopper and a second exhaust hopper, the furnace tube is arranged in the furnace body, and the heating element is arranged between the furnace tube and the furnace body; the furnace tube is divided into a drying zone, a transition zone and a pyrolysis zone from the feeding end to the discharging end; the transition zone separates the drying zone and the pyrolysis zone; a plurality of grids are arranged in the furnace tube area corresponding to the transition zone, and the plurality of grids are used to block the airflow through the transition zone and allow the material to pass through the transition zone; the first exhaust hopper is arranged at the end where the feeding port of the furnace tube is located; the second exhaust hopper is arranged at the end where the discharging port of the furnace tube is located, the drying zone is used to fully evaporate the electrolyte in the lithium battery crushed material, and the grid in the transition zone is used to fully evaporate the electrolyte in the lithium battery crushed material. The electrolyte steam has a blocking effect, but the material can pass through the transition zone and enter the pyrolysis zone under the action of the furnace tube rotation. The electrolyte steam is discharged from the first exhaust hopper located at the end of the furnace tube where the feed end is located. After the material passes through the transition zone, it enters the pyrolysis zone. In the pyrolysis zone, the organic matter in the material is pyrolyzed into small molecular substances, so that the peeling strength between the positive and negative electrode materials and the collector is greatly reduced, which is convenient for subsequent known crushing and sorting, and high-purity battery black powder and valuable components such as copper and aluminum are obtained. The gas generated by pyrolysis and a small amount of entrained black powder are discharged from the second exhaust hopper located at the end of the furnace tube discharge port. The electrolyte evaporation and organic pyrolysis are realized in a rotary furnace, which is conducive to improving the purity of the recovered electrolyte, avoiding the problem of blockage of the existing pyrolysis dust collection pipeline in the same zone, reducing the black powder entrainment when a large amount of gas is discharged, and the black powder recovery rate is high. In addition, the lithium battery crushed material is first converted into steam in the drying zone and discharged from the first exhaust hopper, and then the material enters the pyrolysis zone from the transition zone for pyrolysis without the danger of explosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the lithium battery electrolyte evaporation and organic matter pyrolysis integrated furnace proposed in Example 1 of the present invention.

[0032] Figure 2 It is a schematic diagram of the layout structure of the transition zone of the integrated furnace for lithium battery electrolyte evaporation and organic matter pyrolysis proposed in Example 1 of the present invention.

[0033] Figure 3 It is a longitudinal cross-sectional view of the integrated furnace for lithium battery electrolyte evaporation and organic matter pyrolysis proposed in Example 1 of the present invention.

[0034] Explanation of the accompanying drawings: 1. furnace body; 2. heating element; 3. furnace tube; 31. drying zone; 32. transition zone; 321. grille; 33. pyrolysis zone; 4. first exhaust hopper; 5. second exhaust hopper; 61. feed bin; 62. conveyor; 7. discharge bin; 8. first air inlet pipe; 9. second air inlet pipe; 10. cooling zone. DETAILED DESCRIPTION

[0035] The "range" disclosed in the present application is defined in the form of a lower limit and an upper limit, and a given range is defined by selecting a lower limit and an upper limit, and the selected lower limit and upper limit define the boundaries of the particular range. The range defined in this way can be inclusive or exclusive of the end values, and can be arbitrarily combined, that is, any lower limit can be combined with any upper limit to form a range. For example, if a range of 60 to 120 and 80 to 110 is listed for a particular parameter, it is understood that a range of 60 to 110 and 80 to 120 is also expected. In addition, if the minimum range values ​​1 and 2 are listed, and if the maximum range values ​​3, 4 and 5 are listed, the following ranges can all be expected: 1 to 3, 1 to 4, 1 to 5, 2 to 3, 2 to 4 and 2 to 5. In the present application, unless otherwise specified, the numerical range "a to b" represents an abbreviation of any real number combination between a and b, where a and b are both real numbers. For example, the numerical range "0-5" means that all real numbers between "0-5" are listed in this document, and "0-5" is just an abbreviation of these numerical combinations. In addition, when a parameter is expressed as an integer ≥ 2, it is equivalent to disclosing that the parameter is, for example, an integer of 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, etc.

[0036] If there is no special explanation, the "include" and "comprising" mentioned in this application are open-ended or closed-ended. For example, the "include" and "comprising" may mean that other components not listed may also be included or only the listed components may be included or only the listed components may be included.

[0037] If not specifically stated, in this application, the term "or" is inclusive. For example, the phrase "A or B" means "A, B, or both A and B". More specifically, any of the following conditions satisfies the condition "A or B": A is true (or exists) and B is false (or does not exist); A is false (or does not exist) and B is true (or exists); or both A and B are true (or exist).

[0038] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0039] In the present invention, reference is made to “some embodiments”, “this embodiment”, examples, etc., which describe a subset of all possible embodiments, but it can be understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0040] If similar descriptions of "first / second" appear in the application documents, the following instructions are added. In the following description, the terms "first\second\third" involved are merely used to distinguish similar objects and do not represent a specific ordering of the objects. It can be understood that "first\second\third" can be interchanged in a specific order or sequence where permitted, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein.

[0041] The following are examples of the present application. The examples described below are exemplary and are only used to explain the present application, and should not be construed as limiting the present application. If no specific techniques or conditions are specified in the examples, the techniques or conditions described in the literature in the art or in the product specifications shall be followed.

[0042] Example 1

[0043] Combination Figure 1-3 This embodiment provides a lithium battery electrolyte evaporation and organic matter pyrolysis integrated furnace, including a furnace body 1, a heating element 2, a furnace tube 3, a first exhaust hopper 4 and a second exhaust hopper 5, the furnace tube 3 is arranged in the furnace body 1, and the heating element 2 is arranged between the furnace tube 3 and the furnace body 1;

[0044] The furnace tube 3 is divided into a drying zone 31, a transition zone 32 and a pyrolysis zone 33 from the feed end to the discharge end; the transition zone 32 separates the drying zone 31 from the pyrolysis zone 33;

[0045] A plurality of grids 321 are provided in the furnace tube 3 region corresponding to the transition zone 32, and the plurality of grids 321 are used to block the gas from passing through the transition zone 32 and allow the material to pass through the transition zone 32;

[0046] The first exhaust hopper 4 is arranged at the end where the feed port of the furnace tube 3 is located;

[0047] The second exhaust hopper 5 is arranged at the end of the furnace tube 3 where the discharge port is located.

[0048] On the basis of the above embodiment, multiple grilles 321 in this embodiment are alternately arranged up and down in the furnace tube 3 to form a spiral channel. It is convenient to block the airflow while allowing the material to pass smoothly through the transition zone 32. In some embodiments, multiple grilles 321 are alternately arranged up and down in the furnace tube 3 to form an S-shaped channel. The shape of the grille 321 can be circular, arc or rectangular.

[0049] On the basis of the above embodiment, the end of the grille 321 away from the inner wall of the furnace tube 3 in this embodiment extends to face the side wall of the adjacent grille 321. If two adjacent grilles 321 are translated, the ends away from the inner wall of the furnace tube 3 will partially overlap, thus ensuring a channel for materials to pass through while having a better blocking effect on gas.

[0050] Based on the above embodiment, the number of grilles 321 in this embodiment is 6, which are staggered up and down on the inner wall of the furnace tube 3 to form a spiral channel. In other embodiments, the number of grilles 321 can be 2, 3, 4, 5, 7 or other numbers.

[0051] On the basis of the above embodiments, the heating element 2 in this embodiment is arranged in the drying zone 31 and the pyrolysis zone 33. In this embodiment, the heating element 2 is a resistance wire. The resistance wire is installed in the upper and lower layers of the furnace body 1, and the furnace tube 3 is in the middle. Seven temperature sensors are installed in the middle positions of the drying zone 31 and the pyrolysis zone 33, respectively. They are installed on the inner wall of the furnace body close to the outer wall of the furnace tube 3 to measure the temperature of the outer surface of the furnace tube 3 in the corresponding area. When the measured temperature is lower than the set temperature, the resistance wire heats; when the measured temperature ≥ the set temperature, the resistance wire stops heating. Thereby, the temperature of each temperature zone is independently set and controlled. The temperature of the drying zone 31 is 120-250°C. At this temperature, the electrolyte evaporates, while organic matter such as the diaphragm and the binder is not pyrolyzed, thereby greatly reducing the impurities in the electrolyte vapor and improving the purity. The temperature of the pyrolysis zone 33 is controlled at 400°C-600°C. In the pyrolysis zone 33, the organic substances such as the separator, the negative electrode binder (such as styrene butadiene latex SBR, carboxymethyl cellulose CMC), and the positive electrode binder (such as polyvinylidene fluoride PVDF) in the material are pyrolyzed into small molecular substances, so that the peel strength between the positive and negative electrode materials and the current collector is greatly reduced, which is convenient for subsequent known crushing and sorting to obtain high-purity battery black powder and valuable components such as copper and aluminum. In some embodiments, a heating element can also be set in the transition zone, and the temperature is set to be consistent with the temperature of the drying zone. If the actual temperature is higher than the set temperature, the heating will automatically stop, and if the temperature is lower than the temperature of the drying zone, the heating will be restarted.

[0052] On the basis of the above embodiment, this embodiment further includes a feeding mechanism, which includes a feeding bin 61 and a conveyor 62, the bottom of the feeding bin 61 is connected to the top of the conveyor 62, the discharge port of the conveyor 62 is connected to the feeding port of the furnace tube 3, and the first exhaust hopper 4 is arranged between the feeding bin 61 and the furnace body 1. The lithium battery crushed material enters the conveyor 62 from the feeding bin 61, and enters the furnace tube 3 under the conveying action of the conveyor 62. Further, the conveyor 62 of this embodiment is a screw conveyor.

[0053] On the basis of the above embodiment, this embodiment further includes a discharge bin 7, which is connected to the discharge port of the furnace tube 3, and a second exhaust hopper 5 is arranged on the top of the discharge bin 7. After the lithium battery crushed material enters the furnace tube 3, it passes through the drying zone 31, the transition zone 32 and the pyrolysis zone 33 in sequence, and the pyrolyzed material is discharged from the discharge bin 7, and the gas in the pyrolysis zone 33 is discharged from the second exhaust hopper 5.

[0054] On the basis of the above embodiment, the present embodiment further comprises a first air inlet pipe 8 and a second air inlet pipe 9, wherein the first air inlet pipe 8 is connected to the drying zone 31 of the furnace tube 3, and the second air inlet pipe 9 is connected to the pyrolysis zone 33 of the furnace tube 3. In the present embodiment, the first air inlet pipe 8 provided in the drying zone 31 allows inert gas to be introduced into the drying zone 31, and the oxygen content of the drying zone 31 is controlled within 2%; the second air inlet pipe 9 provided in the pyrolysis zone 33 allows inert gas to be introduced into the pyrolysis zone 33, and the oxygen content of the pyrolysis zone 33 is controlled within 2%; and the inert gas has a driving effect on the gas generated in the drying zone 31 or the pyrolysis zone 33, and can facilitate the gas to be discharged toward the respective outlets.

[0055] On the basis of the above embodiment, the present embodiment further includes a third air inlet pipe (not shown in the figure but easy to understand), the third air inlet pipe is connected to the transition zone 32 of the furnace tube 3, the transition zone is provided with a third air inlet pipe, the third air inlet pipe is connected to the transition zone 32 of the furnace tube 3, and inert gas is introduced into the transition zone 32 to play the role of gas sealing, so as to better isolate the electrolyte vapor in the drying zone 31 and the pyrolysis gas in the pyrolysis zone 33.

[0056] On the basis of the above embodiment, the directions of the gas outlets of the first air inlet pipe 8 and the second air inlet pipe 9 in this embodiment are perpendicular to the axis of the furnace tube 3. In some embodiments, the directions of the gas outlets of the first air inlet pipe 8 and the second air inlet pipe 9 can be tilted toward the side direction or toward the horizontal direction, which is more conducive to the discharge of electrolyte vapor and pyrolysis gas.

[0057] The pyrolyzed material flows out of the rotary kiln from the discharge bin 7. In order to reduce the discharge temperature and ensure safe discharge, based on the above embodiment, a cooling zone 10 is further provided between the pyrolysis zone 33 and the discharge bin 7 in this embodiment. The cooling zone 10 is used to further cool the pyrolyzed material before discharging it.

[0058] This embodiment also provides a treatment method of a lithium battery electrolyte evaporation and organic matter pyrolysis integrated furnace, comprising the following steps:

[0059] The shredded lithium battery crushed materials first enter the drying area 31 of the furnace tube 3, where the electrolyte in the lithium battery crushed materials is fully evaporated, and the electrolyte vapor is discharged from the first exhaust hopper 4;

[0060] After passing through the transition zone 32, the material enters the pyrolysis zone 33, where the organic matter in the material is pyrolyzed into small molecules. The gas generated by the pyrolysis and the volatilized black powder are discharged from the second exhaust hopper 5 into a known tail gas treatment system for black powder collection and gas treatment to meet the emission standards.

[0061] The drying and pyrolysis processes of the lithium battery recycling process are realized on a rotary furnace. The furnace tube 3 is divided into three relatively independent sections: the drying zone 31, the transition zone 32 and the pyrolysis zone 33 by setting the transition zone grid 321 and the first exhaust hopper 4 and the second exhaust hopper 5 at the furnace head and the furnace tail. The first exhaust hopper 4 is set at the furnace head and the second exhaust hopper 5 is set at the furnace tail to discharge the evaporated electrolyte vapor and the pyrolysis gas of organic matter separately. Independent inert gas inlet pipes are set in the drying zone 31 and the pyrolysis zone 33 respectively to accurately control the oxygen content and the pressure in the furnace to ensure safe operation.

[0062] The temperature of the drying zone 31 is 120-250° C. At this temperature, the electrolyte evaporates, while organic matter such as the diaphragm and the adhesive is not pyrolyzed, thereby greatly reducing impurities in the electrolyte vapor and improving purity.

[0063] After the electrolyte is evaporated and discharged in the drying zone 31, the amount of gas generated by pyrolysis of the material in the pyrolysis zone 33 is greatly reduced, so that the volatile black powder carried away by the pyrolysis gas is also greatly reduced, thereby improving the yield of the black powder; at the same time, the mixed gas composed of the pyrolysis gas with reduced components and flow and the reduced volatile black powder is greatly reduced, and the probability of clogging the exhaust pipe is greatly reduced.

[0064] Therefore, the present invention completes the two process steps of drying and pyrolysis on one rotary kiln, and the exhaust duct is unobstructed, the black powder volatilization is small, and the electrolyte vapor purity is high.

[0065] Other beneficial effects of the present invention:

[0066] 1. The electrolyte evaporation and organic matter pyrolysis are realized independently in the same rotary furnace, which is equivalent to one device realizing the functions of two devices, which is more efficient and less costly than two devices.

[0067] 2. The electrolyte evaporation and organic matter pyrolysis are exhausted separately, which is beneficial to improve the purity of electrolyte recovery and reduce the risk of blockage in dust collection pipes. At the same time, it reduces the black powder entrainment when a large amount of gas is discharged, thereby improving the black powder recovery rate.

[0068] 3. The electrolyte evaporation and organic matter pyrolysis are separated into independent zones, which is conducive to the precise control of the reaction conditions such as temperature, pressure, atmosphere, etc. in each zone, making the efficiency higher.

[0069] 4. The design of the barrier fence in the transition zone 32 is the key to achieving zoning. It should have a damping effect on materials and gases, but should not block the passage of materials.

[0070] 5. First, crush the lithium battery materials in the drying area and convert the electrolyte into steam and discharge it from the first exhaust hopper. Then the materials enter the pyrolysis zone from the transition zone for pyrolysis without the risk of combustion and explosion.

[0071] The specific implementation of the present invention described above does not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A lithium battery electrolyte evaporation and organic matter pyrolysis integrated furnace, characterized in that: It comprises a furnace body, a heating element, a furnace pipe, a first exhaust scoop and a second exhaust scoop, wherein the furnace pipe is arranged in the furnace body, and the heating element is arranged between the furnace pipe and the furnace body; The furnace tube is divided into a drying zone, a transition zone and a pyrolysis zone from the feed end to the discharge end; the transition zone separates the drying zone from the pyrolysis zone; A plurality of grilles are arranged in the furnace tube area corresponding to the transition zone, and the plurality of grilles are used to block the airflow from passing through the transition zone and allow the material to pass through the transition zone; The first exhaust hopper is arranged at the end where the feed inlet of the furnace tube is located; The second exhaust hopper is arranged at the end where the discharge port of the furnace tube is located.

2. The lithium battery electrolyte evaporation and organic matter pyrolysis integrated furnace according to claim 1, characterized in that: A plurality of grids are alternately arranged up and down in the furnace tube to form a spiral channel or an S-shaped channel.

3. The lithium battery electrolyte evaporation and organic matter pyrolysis integrated furnace according to claim 2, characterized in that: One end of the grille away from the inner wall of the furnace tube extends to be opposite to the side wall of the adjacent grille.

4. The lithium battery electrolyte evaporation and organic matter pyrolysis integrated furnace according to any one of claims 1 to 3, characterized in that: The number of the grilles is more than 2.

5. The lithium battery electrolyte evaporation and organic matter pyrolysis integrated furnace according to claim 1, characterized in that: The heating element is arranged on the outer wall of the furnace tube corresponding to the drying zone and the pyrolysis zone.

6. The lithium battery electrolyte evaporation and organic matter pyrolysis integrated furnace according to claim 1, characterized in that: It also includes a feeding mechanism, which includes a feeding bin and a conveyor. The bottom of the feeding bin is connected to the top of the conveyor, the discharge port of the conveyor is connected to the feeding port of the furnace tube, and the first exhaust hopper is arranged between the feeding bin and the furnace body.

7. The lithium battery electrolyte evaporation and organic matter pyrolysis integrated furnace according to claim 1, characterized in that: It also includes a discharge bin, which is connected to the discharge port of the furnace tube, and the second exhaust hopper is arranged on the top of the discharge bin; and / or the temperature of the drying zone is 120℃-250℃, and the temperature of the pyrolysis zone is 400℃-600℃.

8. The lithium battery electrolyte evaporation and organic matter pyrolysis integrated furnace according to claim 1, characterized in that: It also includes a first air inlet pipe and a second air inlet pipe, wherein the first air inlet pipe is connected to the drying area of ​​the furnace tube, and the second air inlet pipe is connected to the pyrolysis area of ​​the furnace tube.

9. The lithium battery electrolyte evaporation and organic matter pyrolysis integrated furnace according to claim 1, characterized in that: It also includes a third air inlet pipe, which is communicated with the transition zone of the furnace tube.

10. A treatment method for a lithium battery electrolyte evaporation and organic matter pyrolysis integrated furnace, characterized in that: The following steps are involved: The shredded lithium battery crushed materials first enter the drying area of ​​the furnace tube, where the electrolyte in the lithium battery crushed materials is evaporated, and the electrolyte vapor is discharged from the first exhaust hopper; After passing through the transition zone, the material enters the pyrolysis zone, where the organic matter in the material is pyrolyzed into small molecular substances, and the pyrolysis gas of the organic matter is discharged from the second exhaust hopper.

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