Feeding device and system compatible with pyrolysis of waste lithium batteries and reduction of ternary black powder by carbon

Abstract

The utility model discloses a kind of feeding device and compatible system of waste lithium battery pyrolysis and ternary black powder carbon reduction belongs to battery pyrolysis and ternary black powder carbon reduction technical field.The feeding device, including first feeding mechanism, first conveying mechanism, second feeding mechanism and second conveying mechanism;The side wall of the bottom of the second feeding mechanism is connected by the first conveying mechanism at the discharge end of the first feeding mechanism;The second conveying mechanism is connected with the discharge end of the second feeding mechanism at the feeding end, and the second conveying mechanism is below the discharge end of the first conveying mechanism.In addition, the utility model further proposes a kind of compatible system of waste lithium battery pyrolysis and ternary black powder carbon reduction, including above-mentioned feeding device and heating device.The feeding device proposed in the utility model realizes two kinds of feeding switching and compatibility.

Description

Technical Field

[0001] This utility model relates to the field of battery pyrolysis and ternary black powder carbon reduction technology, specifically to a feeding device and a system compatible with waste lithium battery pyrolysis and ternary black powder carbon reduction. Background Technology

[0002] Currently, the industry processes the pyrolysis of spent lithium batteries and the reduction of ternary lithium-ion batteries separately, establishing independent processes and production systems for each. Examples of publicly available separate processing systems are as follows:

[0003] 1. Waste lithium battery pyrolysis system

[0004] For example, patent CN201811400120.5 discloses a waste lithium battery pyrolysis recycling system and its processing method: the system includes a feeding and feeding mechanism, a pyrolysis furnace body, a discharging mechanism, a tail gas treatment mechanism, etc., to realize the pyrolysis recycling of waste lithium batteries.

[0005] 2. Three-element black powder restoration system

[0006] For example, patent CN202011031389.8 discloses a method for recycling waste powder from the production of ternary materials: the waste powder from the production of ternary materials is mixed with carbon powder and heated to react under an inert atmosphere. The reacted material is selectively leached to prepare battery-grade lithium carbonate, and the leaching residue is further melted at high temperature to obtain a nickel-cobalt-manganese ternary alloy.

[0007] In summary, the existing technologies for pyrolysis of waste lithium batteries and carbon reduction of ternary black powder are two independent processes and systems, which require a large area and have high equipment investment costs.

[0008] How to achieve a process compatible with the pyrolysis of spent lithium batteries and the carbon reduction of ternary black powder is a technical problem that needs to be solved by existing technologies. Utility Model Content

[0009] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a feeding device and a system compatible with waste lithium battery pyrolysis and ternary black powder carbon reduction, thereby solving the technical problem of how to achieve a process compatible with waste lithium battery pyrolysis and ternary black powder carbon reduction in the prior art.

[0010] To achieve the above technical objectives, the present invention provides a feeding device, comprising a first feeding mechanism, a first conveying mechanism, a second feeding mechanism, and a second conveying mechanism; the discharge end of the first feeding mechanism and the side wall at the bottom of the second feeding mechanism are connected through the first conveying mechanism; the feeding end of the second conveying mechanism is connected to the discharge end of the second feeding mechanism, and the second conveying mechanism is located below the discharge end of the first conveying mechanism; the first feeding mechanism is used to convey a mixed powder of ternary black powder and carbon powder; the second feeding mechanism is used to convey crushed waste lithium battery material; the discharge end of the second conveying mechanism is used to connect to the feeding end of a heating device.

[0011] In any embodiment, the discharge end of the second feeding mechanism is located above the second conveying mechanism, the upper part of the second conveying mechanism is open, and the discharge end of the second feeding mechanism is connected to the upper opening of the second conveying mechanism.

[0012] In any embodiment, the first feeding mechanism includes a vacuum feeding system and a powder feeding tank, wherein the discharge end of the vacuum feeding system is connected to the inlet end of the powder feeding tank, and the discharge end of the powder feeding tank is connected to the inlet end of the first conveying mechanism.

[0013] In any embodiment, the second feeding mechanism includes a transition chamber, a gate valve, and a compatible feeding chamber; the gate valve is located inside the transition chamber, the discharge end of the transition chamber is connected to the inlet end of the compatible feeding chamber, the discharge end of the compatible feeding chamber is connected to the inlet end of the second conveying mechanism, and the discharge end of the first conveying mechanism is connected to the side wall of the compatible feeding chamber.

[0014] In any embodiment, the gate valve includes a first sub-gate valve and a second sub-gate valve, which are arranged sequentially from top to bottom within the transition chamber.

[0015] In any embodiment, the first conveying mechanism or the second conveying mechanism is a screw conveyor.

[0016] In addition, this utility model also proposes a system compatible with the pyrolysis of waste lithium batteries and the carbon reduction of ternary black powder, including the above-mentioned feeding device and heating device, wherein the discharge end of the second conveying mechanism of the feeding device is connected to the feeding end of the heating device.

[0017] In any embodiment, the second feeding mechanism in the feeding device is located between the heating device and the first feeding mechanism.

[0018] In any embodiment, it further includes a cooling device, an exhaust gas treatment device, and a discharge mechanism; the inlet of the cooling device is connected to the outlet of the heating device, the outlet of the cooling device is connected to the inlet of the discharge mechanism, and the inlet of the exhaust gas treatment device is connected to the exhaust outlet of the heating device. The cooling device is arranged below the heating device in a two-layer layout.

[0019] In any embodiment, it further includes a ternary black powder unpacking machine, a toner unpacking machine, a ternary black powder silo, a toner silo, and a batching device; the ternary black powder unpacking machine is connected to the ternary black powder silo, the toner unpacking machine is connected to the toner silo, and the discharge end of the ternary black powder silo and the discharge end of the toner silo are respectively connected to the feed end of the batching device.

[0020] Compared with the prior art, the beneficial effects of this utility model include: the mixed powder of ternary black powder and carbon powder enters the first conveying mechanism from the first feeding mechanism, and is then conveyed by the first conveying mechanism. It then enters from the bottom side wall of the second feeding mechanism, and falls into the second conveying mechanism located below the first conveying mechanism, and is then conveyed to the heating device by the second conveying mechanism. The waste lithium battery crushed material enters directly from the second feeding mechanism into the second conveying mechanism, and is then conveyed to the heating device by the second conveying mechanism. Thus, the mixed powder of ternary black powder and carbon powder or waste lithium battery crushed material can be selected to be conveyed according to the needs, realizing the switching and compatibility of the two feeding methods. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the feeding device according to Embodiment 1 of this utility model.

[0022] Figure 2 This is a schematic diagram of the structure of a system compatible with the pyrolysis of waste lithium batteries and the carbon reduction of ternary black powder according to Embodiment 2 of this utility model.

[0023] Figure 3 This is a process flow diagram of the compatible system of Embodiment 2 of this utility model.

[0024] Explanation of reference numerals in the attached drawings: 1. Ternary black powder unpacking machine; 2. Ternary black powder silo; 3. Batching device; 4. Carbon powder silo; 5. Carbon powder unpacking machine; 6. First belt conveyor; 7. Coarse crushing system; 8. Second belt conveyor; 9. First feeding mechanism; 10. Second conveying mechanism; 11. Heating device; 12. Cooling device; 13. Tail gas treatment device; 14. Discharge mechanism; 15. Powder feed hopper; 16. First conveying mechanism; 17. Transition silo; 18. Slide valve; 19. Compatible feed silo; 20. Hot kiln head feed hopper; 21. Hot kiln tube; 22. Hot kiln frame. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0026] Example 1

[0027] Combination Figure 1 This embodiment proposes a feeding device, including a first feeding mechanism 9, a first conveying mechanism 16, a second feeding mechanism, and a second conveying mechanism 10; the discharge end of the first feeding mechanism 9 and the side wall of the bottom of the second feeding mechanism are connected through the first conveying mechanism 16; the feeding end of the second conveying mechanism 10 is connected to the discharge end of the second feeding mechanism, and the second conveying mechanism 10 is located below the discharge end of the first conveying mechanism 16; the first feeding mechanism 9 is used to convey a mixed powder of ternary black powder and carbon powder; the second feeding mechanism is used to convey crushed waste lithium battery material; the discharge end of the second conveying mechanism 10 is used to connect to the feeding end of the heating device 11.

[0028] Based on the above embodiments, in this embodiment, the discharge end of the second feeding mechanism is located above the second conveying mechanism 10, the upper opening of the feeding end of the second conveying mechanism 10 is open, and the discharge end of the second feeding mechanism is connected to the upper opening of the second conveying mechanism 10. Material enters the second conveying mechanism 10 from the upper opening.

[0029] Based on the above embodiments, the first feeding mechanism 9 in this embodiment includes a vacuum feeding system and a powder feeding tank 15. The discharge end of the vacuum feeding system is connected to the feed end of the powder feeding tank 15, and the discharge end of the powder feeding tank 15 is connected to the feed end of the first conveying mechanism.

[0030] Based on the above embodiments, the second feeding mechanism in this embodiment includes a transition chamber 17, a gate valve 18, and a compatible feeding chamber 19; the gate valve 18 is disposed in the transition chamber 17, the discharge end of the transition chamber 17 is connected to the feed end of the compatible feeding chamber 19, the discharge end of the compatible feeding chamber 19 is connected to the feed end of the second conveying mechanism 10, and the discharge end of the first conveying mechanism 16 is connected to the side wall of the compatible feeding chamber 19.

[0031] The mixed powder of ternary black powder and carbon powder enters the powder feeding tank 15 through a vacuum feeding system. The mixed powder falls into the first conveying mechanism 16 through the powder feeding tank 15. The first conveying mechanism 16 conveys the powder to the compatible feeding hopper 19. The powder falls into the second conveying mechanism 10 through the compatible feeding hopper 19. The second conveying mechanism 10 conveys the powder through the hot kiln head feeding hopper 20 of the heating device and into the hot kiln tube 21 of the heating device for carbon reduction treatment of ternary black powder. The heating device in this embodiment also includes a hot kiln frame 22 for supporting the hot kiln tube 21 and the hot kiln head feeding hopper 20.

[0032] Based on the above embodiments, the slide gate valve 18 in this embodiment includes a first sub-slide gate valve and a second sub-slide gate valve, which are arranged sequentially from top to bottom in the transition chamber 17.

[0033] The waste lithium battery shredded material enters from the transition chamber 17, which is equipped with a nitrogen inlet pipe and an air exhaust pipe. The two-stage gate valve (i.e., the first sub-gate valve and the second sub-gate valve) is programmed to open and close, realizing the air replacement and orderly feeding of the material in the transition chamber 17. The material falls from the second sub-gate valve, passes through the compatible feeding chamber 19, and falls into the second conveying mechanism 10. The second conveying mechanism 10 conveys the material through the hot kiln head feeding hopper 20 and into the hot kiln tube 21, realizing the pyrolysis feeding of the waste lithium battery shredded material.

[0034] Based on the above embodiments, in this embodiment, the first conveying mechanism 16 or the second conveying mechanism 10 is a screw conveyor.

[0035] When feeding the mixed powder of ternary black powder and carbon powder, the gate valve 18 is in the closed state, and the first conveying mechanism 16 and the second conveying mechanism 10 are started; when feeding the crushed waste lithium battery material, the gate valve 18 is in the started state, the first conveying mechanism 16 is closed, and the second conveying mechanism 10 is started; thus realizing the switching and compatibility of the two feeding modes.

[0036] Example 2

[0037] Combination Figure 2 This embodiment proposes a system compatible with both waste lithium battery pyrolysis and ternary black powder carbon reduction, including the feeding device and heating device 11 described in Embodiment 1. The discharge end of the second conveying mechanism 10 of the feeding device is connected to the feed end of the heating device 11. This system is compatible with both waste lithium battery pyrolysis and ternary black powder carbon reduction processes. The heating device 11 mainly consists of a furnace tube, heating elements, a temperature control system, an atmosphere system, a furnace tube drive system, a frame, and an exhaust system. It is a rotary heating furnace already disclosed in the prior art, with adjustable process parameters such as process temperature, process time, and oxygen content, capable of completing both waste lithium battery pyrolysis and ternary black powder carbon reduction.

[0038] Based on the above embodiments, in this embodiment, the second feeding mechanism in the feeding device is located between the heating device 11 and the first feeding mechanism 9. This layout makes the system structure compact, saves floor space, and reduces investment costs.

[0039] Based on the above embodiments, this embodiment further includes a cooling device 12, an exhaust gas treatment device 13, and a discharge mechanism 14; the inlet of the cooling device 12 is connected to the outlet of the heating device 11, the outlet of the cooling device 12 is connected to the inlet of the discharge mechanism 14, the inlet of the exhaust gas treatment device 13 is connected to the exhaust outlet of the heating device 11, and the cooling device 12 is arranged below the heating device in a two-layer layout.

[0040] Cooling device 12 mainly consists of circulating cooling water, furnace tubes, furnace tube drive system, rotary joints, etc. It is a rotary cooling furnace that has been disclosed in the prior art. The process parameters such as discharge temperature and residence time are adjustable, and it can complete the cooling of pyrolysis material. In order to save space, the cooling device 12 is arranged at the bottom of the heating device 11, in a two-layer layout, which makes the structure more compact. The feed end of the cooling device 12 is connected to the discharge end of the heating device 11, which is a known technology.

[0041] Based on the above embodiments, this embodiment also includes a ternary black powder unpacking machine 1, a toner unpacking machine 5, a ternary black powder silo 2, a toner silo 4, and a batching device 3; the ternary black powder unpacking machine 1 is connected to the ternary black powder silo 2, the toner unpacking machine 5 is connected to the toner silo 4, and the discharge end of the ternary black powder silo 2 and the discharge end of the toner silo 4 are respectively connected to the feed end of the batching device 3.

[0042] The ternary black powder unpacking machine 1 is a conventional unpacking machine that automatically unpacks ternary black powder ton bags; the ternary black powder silo 2 is used for temporary storage of ternary black powder; the inlet of the ternary black powder silo 2 is also equipped with a screening machine, which is a disc screening machine, to screen out impurities in the ternary black powder and ensure that it will not cause blockage problems in subsequent pipelines and conveying devices; the batching device 3 mainly consists of a precision weighing module and a mixing mechanism, which conveys black powder and carbon powder to the batching system according to the mass ratio through precise weighing and pneumatic conveying, and mixes the black powder and carbon powder evenly. The evenly mixed material enters the temporary storage silo; the carbon powder unpacking machine 5 is a conventional unpacking machine that automatically unpacks carbon powder ton bags; the carbon powder silo 4 is a stainless steel silo for temporary storage of carbon powder.

[0043] This embodiment also includes a first belt conveyor 6, which mainly consists of a belt, a housing, and a geared motor. It is variable frequency speed control. Waste lithium batteries are fed into the feed inlet of the first belt conveyor 6 by manual feeding or automatic feeding by a robotic arm, and are then transported to the coarse crushing system 7 for coarse crushing.

[0044] This embodiment also includes a coarse crushing system 7, the main unit of which consists of two twin-shaft shredders, which crush waste lithium battery materials to a size of about 20-40mm. After crushing, the materials enter the No. 2 belt conveyor. The crushing chamber of the coarse crushing system 7 is filled with nitrogen to control the oxygen content to <3%, thereby eliminating the risk of electrolyte combustion and explosion that may occur during the crushing process.

[0045] This embodiment also includes a second belt conveyor 8, which mainly consists of a belt, a housing, and a geared motor. It can be frequency-controlled to transport the coarsely crushed material to the feeding mechanism. The screw feeder in the feeding mechanism evenly transports the material into the furnace tube of the heating system.

[0046] The purpose of carbon reduction in ternary cathode materials is to reduce nickel, cobalt, and manganese in the ternary cathode materials into elemental metals or oxides in lower valence states, thereby generating lithium carbonate to achieve preferential lithium extraction in subsequent wet processes. Figure 3 The carbon reduction process mainly includes the following steps:

[0047] SA1 Unpacking

[0048] The bulk bags of black powder and toner are hoisted to the black powder unpacking machine and toner unpacking machine respectively for automatic unpacking. At the same time as unpacking, the dust removal fan system is started to extract the emitted dust for recycling.

[0049] SA2 screening

[0050] Impurities in the black powder are screened to ensure that they do not cause blockages in subsequent pipelines and conveying devices.

[0051] SA3 Ingredients

[0052] Black powder and carbon powder are precisely weighed and pneumatically conveyed to the batching system in proportion to be mixed. The black powder and carbon powder are then mixed evenly and the mixed material enters the temporary storage silo.

[0053] SA4 feed

[0054] The material in the temporary storage silo is transported to the feed silo by gas conveying. The material in the feed silo is then fed quantitatively and evenly to the feeding mechanism. The screw feeder in the feeding mechanism evenly conveys the material into the furnace tube of the heating system.

[0055] SA5 reduction reaction

[0056] The blend of ternary black powder and carbon powder undergoes a high-temperature reduction reaction in the furnace tube of the heating system to produce nickel-cobalt-manganese alloy (containing some low-valence oxides), lithium carbonate, and carbon monoxide (containing some carbon dioxide).

[0057] Due to the complexity of the black powder's composition, the reduction reaction is also complex. One of the reaction equations is as follows:

[0058] 2Li(Ni x Co y Mn z )O2+2C=2(xNi+yCo+zMn)+Li2CO3+CO

[0059] In the above formula: x + y + z = 1

[0060] Process temperature: 450-900℃; Process atmosphere: inert atmosphere (e.g., nitrogen), oxygen content <3%; Process time: 0.5-2h.

[0061] SA6 Cooling

[0062] The material after the reduction reaction enters the cooling system for cooling. The cooling medium is circulating cooling water, and the material is cooled to below 70°C.

[0063] SA7 output

[0064] After cooling, the material enters the discharge system and is conveyed to a linear screen for screening. The screened black powder material is then pneumatically conveyed to a black powder ton bag packaging machine for direct packaging. The material on the screen is further crushed and then screened again. The material under the screen is pneumatically conveyed to a black powder ton bag packaging machine for direct packaging. The material on the screen is discharged through the screening system and then packaged.

[0065] SA8 exhaust gas treatment

[0066] The mixed gas generated during the reduction reaction is collected and rendered harmless through the exhaust gas treatment system to achieve compliant emissions.

[0067] The exhaust gas treatment system includes equipment and pipelines from the combustion chamber to the chimney, and mainly consists of the combustion chamber, quench tower, dry reaction unit, bag filter, spray tower, induced draft fan, and chimney.

[0068] Combination Figure 3 The process flow of waste lithium battery pyrolysis mainly includes the following steps:

[0069] SB1 feeding

[0070] Waste lithium batteries are fed into the feed inlet of the first belt conveyor 6 by manual feeding or automatic feeding by a robotic arm, and then transported to the coarse crushing system 7 for coarse crushing.

[0071] SB2 coarse crushing

[0072] Waste lithium batteries are crushed in the coarse crushing system 7, and the battery material is crushed to a size of about 20-40mm. After crushing, it enters the second belt conveyor 8. Nitrogen is filled into the crushing chamber of the coarse crushing system 7 to control the oxygen content to <3%, thereby eliminating the risk of electrolyte combustion and explosion that may occur during the crushing process.

[0073] SB3 Conveyor

[0074] The second belt conveyor 8 transports the coarsely crushed material to the feeding device. Nitrogen is filled into the second belt conveyor 8 to control the oxygen content to <3%, thereby eliminating the risk of electrolyte combustion and explosion that may occur during the conveying process.

[0075] SB4 feed

[0076] The coarsely crushed material is conveyed to the feeding device by the second belt conveyor 8, and the second conveying mechanism 10 in the feeding device evenly conveys the material into the furnace tube of the heating device 11.

[0077] SB5 pyrolysis reaction

[0078] The material undergoes a high-temperature pyrolysis reaction within the furnace tube of the heating device 11. The electrolyte in the material is evaporated and pyrolyzed, and organic matter such as the separator and binder in the material is also pyrolyzed. The pyrolysis generates a pyrolysis mixed gas and pyrolysis oil vapor, which are then treated harmlessly through the tail gas treatment device 13. After pyrolysis treatment, the binder in the waste lithium batteries is pyrolyzed away, and the adhesion between the black powder and the copper and aluminum foil is drastically reduced, facilitating subsequent peeling and sorting.

[0079] Process temperature: 400-550℃

[0080] Process atmosphere: Inert atmosphere (e.g., nitrogen), oxygen content <3%.

[0081] Processing time: 0.5–1.5 hours

[0082] SB6 Cooling

[0083] The pyrolyzed material enters the cooling device 12 for cooling. The cooling medium is circulating cooling water, and the material is cooled to below 70°C.

[0084] SB7 discharge

[0085] After cooling, the material enters the discharge mechanism 14. The material is lifted and conveyed to a linear screen for screening. After screening, the black powder material is pneumatically conveyed to the black powder ton bag packaging machine for direct packaging. The material on the screen is further crushed and then screened again. The material under the screen is pneumatically conveyed to the black powder ton bag packaging machine for direct packaging. The material on the screen is discharged through the screening system and then packaged.

[0086] SB8 exhaust gas treatment

[0087] The mixed gas generated during pyrolysis is collected and rendered harmless by the exhaust gas treatment device 13 to achieve compliant emissions.

[0088] The exhaust gas treatment device 13 is derived from existing technology and includes equipment and pipelines from the combustion chamber to the chimney. It mainly consists of a combustion chamber, a quench tower, a dry reaction device, a bag filter, a spray tower, an induced draft fan, and a chimney.

[0089] from Figure 3 It is evident that steps SA1-SA3 of the ternary black powder carbon reduction process are completed on the unpacking machine, screening machine, and batching system; steps SB1-SB3 of the waste lithium battery pyrolysis process are completed on the belt conveyor and coarse crushing system; steps SA4-SA8 of the ternary black powder carbon reduction process and steps SB4-SB8 of the waste lithium battery pyrolysis process are completed on the same system. When switching between the two processes, only process parameters such as process temperature and process time need to be adjusted; thus achieving compatibility between the waste lithium battery pyrolysis process and the ternary black powder carbon reduction process.

[0090] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A feeding device, characterized in that, It includes a first feeding mechanism, a first conveying mechanism, a second feeding mechanism, and a second conveying mechanism; the discharge end of the first feeding mechanism and the side wall at the bottom of the second feeding mechanism are connected through the first conveying mechanism; the feed end of the second conveying mechanism is connected to the discharge end of the second feeding mechanism, and the second conveying mechanism is located below the discharge end of the first conveying mechanism; the first feeding mechanism is used to convey a mixed powder of ternary black powder and carbon powder; the second feeding mechanism is used to convey crushed waste lithium battery material; the discharge end of the second conveying mechanism is used to connect to the feed end of the heating device.

2. The feeding device according to claim 1, characterized in that, The discharge end of the second feeding mechanism is located above the second conveying mechanism, and the upper opening of the second conveying mechanism is connected to the upper opening of the second feeding mechanism.

3. The feeding device according to claim 1, characterized in that, The first feeding mechanism includes a vacuum feeding system and a powder feeding tank. The discharge end of the vacuum feeding system is connected to the inlet end of the powder feeding tank, and the discharge end of the powder feeding tank is connected to the inlet end of the first conveying mechanism.

4. The feeding device according to claim 1, characterized in that, The second feeding mechanism includes a transition chamber, a gate valve, and a compatible feeding chamber; the gate valve is located inside the transition chamber, the discharge end of the transition chamber is connected to the inlet end of the compatible feeding chamber, the discharge end of the compatible feeding chamber is connected to the inlet end of the second conveying mechanism, and the discharge end of the first conveying mechanism is connected to the side wall of the compatible feeding chamber.

5. The feeding device according to claim 4, characterized in that, The gate valve includes a first sub-gate valve and a second sub-gate valve, which are arranged sequentially from top to bottom within the transition chamber.

6. The feeding device according to claim 1, characterized in that, The first conveying mechanism or the second conveying mechanism is a screw conveyor.

7. A system compatible with the pyrolysis of spent lithium batteries and the carbon reduction of ternary lithium black powder, characterized in that, It includes the feeding device and heating device as described in claim 1, wherein the discharge end of the second conveying mechanism of the feeding device is connected to the feed end of the heating device.

8. The system for compatible pyrolysis of spent lithium batteries and carbon reduction of ternary black powder according to claim 7, characterized in that, The second feeding mechanism in the feeding device is located between the heating device and the first feeding mechanism.

9. The system for compatible pyrolysis of spent lithium batteries and carbon reduction of ternary black powder according to claim 7, characterized in that, It also includes a cooling device, an exhaust gas treatment device, and a discharge mechanism; the inlet of the cooling device is connected to the outlet of the heating device, the outlet of the cooling device is connected to the inlet of the discharge mechanism, and the inlet of the exhaust gas treatment device is connected to the outlet of the heating device.

10. The system compatible with waste lithium battery pyrolysis and ternary black powder carbon reduction according to claim 8 or 9, characterized in that, It also includes a ternary black powder unpacking machine, a toner unpacking machine, a ternary black powder silo, a toner silo, and a batching device; the ternary black powder unpacking machine is connected to the ternary black powder silo, the toner unpacking machine is connected to the toner silo, and the discharge end of the ternary black powder silo and the discharge end of the toner silo are respectively connected to the feed end of the batching device.

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