Pyrolysis conveying system for sealed battery recycling

Abstract

The application discloses a pyrolysis conveying system for closed battery recycling, which comprises a stock bin, a pyrolysis furnace and a conveying belt. One end of the conveying belt is located below a discharge port of the stock bin, and the other end is located above a feed inlet of the pyrolysis furnace, so as to convey raw materials to be pyrolyzed in the stock bin to the pyrolysis furnace. A material box for receiving the raw materials is arranged on the conveying belt, and a positioning device is arranged on the conveying belt, which is used for locking and fixing the material box on a belt body of the conveying belt. The conveying belt and the material box arranged on the conveying belt are additionally arranged between the stock bin and the pyrolysis furnace, which replaces the manual feeding mode, and can efficiently convey the raw materials to be pyrolyzed into the pyrolysis furnace. In addition, the positioning device can also stably and conveniently realize the disassembly and assembly of the material box on the conveying belt.

Description

Technical Field

[0001] This invention relates to the field of battery recycling technology, and in particular to a closed-type pyrolysis conveying system for battery recycling. Background Technology

[0002] Currently, driven by the rapid growth of the new energy vehicle and energy storage markets, my country's lithium battery shipments are continuously increasing. This significant increase in lithium battery production has also led to a surge in the volume of retired lithium batteries and the processing of battery scrap, resulting in strong demand for retired battery recycling, while the supply from recycling companies remains relatively weak. Furthermore, China's reliance on imported lithium battery raw materials means that recycled materials can serve as an important substitute, making the demand for recycled battery materials extremely urgent for lithium battery manufacturers.

[0003] The recycling and reuse of waste lithium batteries involves multiple production lines, including: (1) battery pack pre-disassembly production line, (2) LFP battery cascade utilization production line, (3) waste LFP battery crushing and sorting production line, (4) LFP cathode material repair production line, (5) LFP and NCM electrode crushing and sorting production line, and (6) copper-aluminum black powder mixture fine sorting production line.

[0004] The lack of standardized and diverse models of power batteries has created difficulties for their tiered utilization and recycling. Power battery recycling mainly involves two aspects:

[0005] (1) Retired batteries that meet the energy decay level should be reused in a tiered manner;

[0006] (2) Recycle batteries that cannot be reused in a tiered manner, and recover materials such as nickel, cobalt, manganese, and lithium, or repair the recycled battery materials to improve recycling.

[0007] The process of tiered utilization requires dismantling, testing, separation, and reassembly, which is mainly done manually and semi-automatically. The technologies of different companies are essentially similar, and so far, it has mainly been used for demonstration projects, which have not been able to achieve economies of scale.

[0008] The recycling model refers to the process of separating valuable metals such as lithium from spent power lithium batteries through physical and chemical methods such as dismantling, sorting, incineration, leaching, dissolving, impurity removal, extraction, and crystallization, and then producing metal compounds or direct raw materials for power lithium batteries. This is currently the main recycling model for power lithium batteries in China. When batteries cannot be reused in a tiered manner, spent power lithium batteries are more suitable for recycling. The metal components extracted through the recycling model can be used as raw materials in various lithium battery and powder metallurgy fields.

[0009] The key technologies in the recycling model mainly lie in the material extraction process, which can be divided into physical, chemical, and biological methods. The basic recycling process includes pretreatment and material extraction. Recycling can be divided into pretreatment and post-treatment. Pretreatment involves first thoroughly discharging the spent lithium-ion batteries, then disassembling and separating the battery's positive electrode, negative electrode, electrolyte, separator, and metal casing. After pretreatment, the valuable metals in each component can be recycled through subsequent processing, including high-temperature pyrolysis, hydrometallurgy, pyrometallurgy, and material repair.

[0010] In the recycling of sealed batteries, high-temperature pyrolysis involves roasting the batteries in a high-temperature pyrolysis furnace filled with inert gas at 400-600℃. The membrane is decomposed, and short-chain olefins and ester organic compounds are collected and incinerated for emission.

[0011] However, in most related technologies, the raw materials to be pyrolyzed in the silo are transferred to the pyrolysis furnace for pyrolysis by manual feeding. This method is not only time-consuming and labor-intensive, but also very inconvenient and has low transmission efficiency. Summary of the Invention

[0012] To address the technical problems mentioned in the background section, the present invention provides a closed-type pyrolysis conveying system for battery recycling.

[0013] This invention is achieved using the following technical solution: a closed-type pyrolysis conveying system for battery recycling, comprising a hopper, a pyrolysis furnace, and a conveyor belt. One end of the conveyor belt is located below the discharge port of the hopper, and the other end is located above the feed port of the pyrolysis furnace, so as to convey the raw materials to be pyrolyzed in the hopper to the pyrolysis furnace. The conveyor belt is provided with a material box for receiving the raw materials, and a positioning device is provided on the conveyor belt for locking and fixing the material box to the belt body.

[0014] As a further improvement to the above solution, the positioning device includes a positioning post fixed on the surface of the conveyor belt, a base plate is provided between the material box and the conveyor belt, a first positioning hole is provided on the base plate for the positioning post to pass through, and a second positioning hole is provided on the side of the material box facing the conveyor belt to engage with the positioning post.

[0015] As a further improvement to the above solution, a first locking rod parallel to the positioning post is provided on the side of the material box facing the substrate, and a first locking hole is provided on the substrate to engage with the first locking rod.

[0016] As a further improvement to the above solution, a first movable rod parallel to the conveyor belt is elastically provided inside the substrate. One end of the first movable rod extends into the first positioning hole and can slide and press against the positioning post after contact. A second locking hole is provided on the first movable rod to engage with the first locking rod.

[0017] As a further improvement to the above solution, a sliding groove is provided in the substrate, and a slider is slidably disposed in the sliding groove. The slider is sleeved and fixed on the outside of the first movable rod. A first spring is sleeved on the outside of the first movable rod. The two ends of the first spring are respectively connected to the outer wall of the slider and the groove wall. When the first spring is not deformed, the end of the first movable rod away from the first locking hole extends into the first positioning hole.

[0018] As a further improvement to the above solution, the positioning post is provided with an axially oriented slot for the end of the first movable rod to be slidably pressed and inserted, and for axial movement.

[0019] As a further improvement to the above solution, a first cylinder is rotatably disposed inside the substrate. A pressure-bearing rod is inserted into one end of the first cylinder. One end of the pressure-bearing rod extends into a first locking hole and can press against the end of the first locking rod. A spiral groove is axially formed on the inner side wall of the first cylinder. A protrusion is provided on the outer wall of the pressure-bearing rod to slide and engage with the groove. A locking rod that can move axially relative to the other end of the first cylinder is slidably engaged. A locking hole is formed on the surface of the conveyor belt to be rotatably screwed into the locking rod.

[0020] As a further improvement to the above solution, a washer is fixedly sleeved on the outside of the pressure rod, and a second spring is sleeved on the outside of the pressure rod. When the first clamping rod touches the pressure rod, the second spring is in a state of tensile deformation. A third spring is provided between the end of the locking rod away from the conveyor belt and the inner wall of the first cylinder.

[0021] As a further improvement to the above solution, a first conical tooth is sleeved and fixed on the outer side of the first cylinder, a first fixing plate is fixed on the base plate, a second cylinder is rotatably mounted on the first fixing plate, a second conical tooth is provided at one end of the second cylinder to cooperate with the first conical tooth, a screw is threaded into the other end of the second cylinder, a second fixing plate is provided at one end of the screw, a telescopic rod is provided between the first fixing plate and the second fixing plate, a third locking rod is provided on one side of the second fixing plate, a second movable rod parallel to the axial direction of the positioning post is slidably and elastically inserted into the positioning post, one end of the second movable rod extends into the slot and contacts and cooperates with the first movable rod, and a third locking hole is provided on the second movable rod to engage with the third locking rod.

[0022] As a further improvement to the above solution, a pad is provided inside the positioning column, and a fourth spring is provided between one side of the pad and the other end of the second movable rod. When the first movable rod touches the second movable rod, the fourth spring is in a compressed deformation state.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] The closed-type pyrolysis conveying system for battery recycling of the present invention replaces the manual feeding method by adding a conveyor belt and a material box on the conveyor belt between the silo and the pyrolysis furnace. It can efficiently convey the raw materials to be pyrolyzed into the pyrolysis furnace, and the material box can be stably and conveniently installed and removed from the conveyor belt by the positioning device. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 for Figure 1 A partial cross-sectional view of the material box in a positioned state on the conveyor belt;

[0027] Figure 3 for Figure 2 Enlarged structural diagram at point A;

[0028] Figure 4 for Figure 2 Enlarged structural diagram at point B;

[0029] Figure 5 for Figure 1 A schematic diagram of the material box in a non-positioned state;

[0030] Figure 6 for Figure 1 A partial cross-sectional view of the positioning post on the transmission belt in a non-positioning state;

[0031] Figure 7 for Figure 1 A partial cross-sectional view of the substrate in a non-positioned state.

[0032] Explanation of key symbols:

[0033] 1. Hopper; 2. Pyrolysis furnace; 3. Conveyor belt; 4. Material box; 5. Base plate; 6. Positioning post; 7. First positioning hole; 8. Second positioning hole; 9. First locking rod; 10. First locking hole; 11. First movable rod; 12. Second locking hole; 13. Slide groove; 14. Slider; 15. Slot; 16. First cylinder; 17. Pressure-bearing rod; 18. Groove; 19. Protrusion; 20. Washer ring; 21. Locking rod; 22. Locking hole; 23. First conical tooth; 24. First fixing plate; 25. Second cylinder; 26. Second conical tooth; 27. Screw; 28. Telescopic rod; 29. ​​Second fixing plate; 30. Third locking rod; 31. Second movable rod; 32. Third locking hole. Detailed Implementation

[0034] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0035] Please combine Figures 1 to 7 A closed-type battery recycling pyrolysis conveying system includes a silo 1, a pyrolysis furnace 2, and a conveyor belt 3. One end of the conveyor belt 3 is located below the discharge port of the silo 1, and the other end is located above the feed port of the pyrolysis furnace 2, so as to transport the raw materials of the closed-type batteries to be pyrolyzed in the silo 1 to the pyrolysis furnace.

[0036] The conveyor belt 3 is equipped with a material box 4 for receiving raw materials. The top of the material box 4 is open to receive raw materials output from the bottom discharge port of the silo 1.

[0037] A positioning device is provided on the conveyor belt 3, which is used to lock and fix the material box 4 on the belt body of the conveyor belt 3.

[0038] The positioning device includes a positioning post 6 fixed on the surface of the conveyor belt 3, a base plate 5 between the material box 4 and the conveyor belt 3, a first positioning hole 7 on the base plate 5 for the positioning post 6 to pass through, and a second positioning hole 8 on the side of the material box 4 facing the conveyor belt 3 for engaging with the positioning post 6.

[0039] The material box 4 can be initially fixed on the material bin 1 by means of the positioning pin 6, the first positioning hole 7, and the second positioning hole 8.

[0040] The material box 4 has a first locking rod 9 parallel to the positioning post 6 on the side facing the substrate 5, and the substrate 5 has a first locking hole 10 that engages with the first locking rod 9.

[0041] The connection stability between the material box 4 and the substrate 5 can be improved by using the first locking rod 9 and the first locking hole 10.

[0042] The substrate 5 is elastically provided with a first movable rod 11 parallel to the conveyor belt 3. One end of the first movable rod 11 extends into the first positioning hole 7 and can slide and press against the positioning post 6 after contact. The first movable rod 11 is provided with a second locking hole 12 that engages with the first locking rod 9.

[0043] A groove 13 is provided in the substrate 5, and a slider 14 is slidably disposed in the groove 13. The slider 14 is sleeved and fixed on the outside of the first movable rod 11. A first spring is sleeved on the outside of the first movable rod 11. The two ends of the first spring are respectively connected to the outer wall of the slider 14 and the groove wall of the groove 13. When the first spring is not deformed, the end of the first movable rod 11 away from the first locking hole 10 extends into the first positioning hole 7.

[0044] The positioning post 6 has an axially formed slot 15 that allows the end of the first movable rod 11 to slide and be inserted, and can move axially.

[0045] In this embodiment, when the positioning pin 6 is inserted and passes through the first positioning hole 7, it will press the first movable rod 11, forcing the second locking hole 12 of the first movable rod 11 to move into the first locking hole 10, so that the second locking hole 12 corresponds to the position of the first locking rod 9, so that when the first locking rod 9 is locked into the first locking hole 10, it will continue to be locked into the second locking hole 12, further improving the locking and fixing state of the first locking rod 9.

[0046] A first cylindrical body 16 is rotatably disposed inside the substrate 5. A pressure-bearing rod 17 is inserted into one end of the first cylindrical body 16. One end of the pressure-bearing rod 17 extends into the first locking hole 10 and can contact and cooperate with the end of the first locking rod 9. A spiral groove 18 is axially opened on the inner side wall of the first cylindrical body 16. A protrusion 19 is provided on the outer wall of the pressure-bearing rod 17 to slide and engage with the groove 18. A locking rod 21 that can move axially relative to the other end of the first cylindrical body 16 is slidably engaged. A locking hole 22 is opened on the surface of the conveyor belt 3 to be rotatably screwed into the locking rod 21.

[0047] A washer 20 is fixedly sleeved on the outside of the pressure rod 17, and a second spring is sleeved on the outside of the pressure rod 17. When the first clamping rod 9 presses against the pressure rod 17, the second spring is in a state of tension deformation.

[0048] A third spring is provided between the end of the locking rod 21 away from the conveyor belt 3 and the inner wall of the first cylinder 16. The third spring ensures that the locking rod 21 remains pressed against the opening of the locking hole 22 when it is not screwed into the locking hole 22.

[0049] In this embodiment, when the first locking rod 9 is inserted into the first locking hole 10, it will squeeze the pressure rod 17 to extend axially into the first cylinder 16, so that the protrusion 19 continuously rubs and squeezes the spiral groove 18, forcing the first cylinder 16 to rotate in one direction, so that the locking rod 21 is screwed into the locking hole 22. This not only realizes the positioning and fixing of the substrate 5 on the conveyor belt 3, but also makes the material box 4, the substrate 5 and the conveyor belt 3 form an integral whole, improving the installation stability of the material box 4 on the conveyor belt 3.

[0050] A first conical tooth 23 is fixedly sleeved on the outer side of the first cylindrical body 16. A first fixing plate 24 is fixed on the base plate 5. A second cylindrical body 25 is rotatably mounted on the first fixing plate 24. A second conical tooth 26 that mates with the first conical tooth 23 is provided at one end of the second cylindrical body 25. A screw 27 is threaded into the other end of the second cylindrical body 25. A second fixing plate 29 is provided at one end of the screw 27. A telescopic rod 28 is provided between the first fixing plate 24 and the second fixing plate 29. A third locking rod 30 is provided on one side of the second fixing plate 29. A second movable rod 31 that is parallel to the axial direction of the positioning post 6 is slidably and elastically inserted into the positioning post 6. One end of the second movable rod 31 extends into the slot 15 and contacts and engages with the first movable rod 11. A third locking hole 32 that engages with the third locking rod 30 is provided on the second movable rod 31.

[0051] The positioning post 6 has a pad inside, and a fourth spring is provided between one side of the pad and the other end of the second movable rod 31. When the first movable rod 11 presses the second movable rod 31, the fourth spring is in a compressed deformation state.

[0052] In this embodiment, when the positioning pin 6 passes through the first positioning hole 7, the end of the first movable rod 11 will be inserted into the slot 15 and moved axially to the bottom of the slot 15 to press the second movable rod 31, forcing the position of the third locking hole 32 to correspond to the position of the third locking rod 30. The rotation of the first cylinder 16 can also drive the first bevel tooth 23, the second bevel tooth 26, and the second cylinder 25 to rotate synchronously, so that the second cylinder 25 and the screw 27 have mutual thread action, and under the limiting action of the telescopic rod 28, the third locking rod 30 is moved towards the second movable rod 31 through the second fixing plate 29, so that the third locking rod 30 is locked into the third locking hole 32, completing the locking and fixing of the positioning pin 6 in the first positioning hole 7, and improving the stability of the material box 4 after installation on the conveyor belt 3.

[0053] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A closed-loop pyrolysis conveying system for battery recycling, characterized in that, The system includes a hopper, a pyrolysis furnace, and a conveyor belt. One end of the conveyor belt is located below the discharge port of the hopper, and the other end is located above the feed port of the pyrolysis furnace, so as to transport the raw materials to be pyrolyzed in the hopper to the pyrolysis furnace. The conveyor belt is equipped with a material box for receiving the raw materials, and a positioning device is provided on the conveyor belt for locking and fixing the material box to the belt body. The positioning device includes a positioning post fixed on the surface of the conveyor belt, a base plate is provided between the material box and the conveyor belt, a first positioning hole is provided on the base plate for the positioning post to pass through, and a second positioning hole is provided on the side of the material box facing the conveyor belt to engage with the positioning post. The material box is provided with a first locking rod parallel to the positioning post on the side facing the substrate, and the substrate is provided with a first locking hole that engages with the first locking rod. The substrate is elastically provided with a first movable rod parallel to the conveyor belt body. One end of the first movable rod extends into the first positioning hole and can slide and press against the positioning post after contact. The first movable rod is provided with a second locking hole that engages with the first locking rod. The positioning post has an axially formed slot that allows the end of the first movable rod to slide and be inserted, and to move axially. A first cylinder is rotatably disposed inside the substrate. A pressure-bearing rod is inserted into one end of the first cylinder. One end of the pressure-bearing rod extends into a first locking hole and can press against the end of the first locking rod. A spiral groove is axially formed on the inner side wall of the first cylinder. A protrusion is provided on the outer wall of the pressure-bearing rod to slide and engage with the groove. A locking rod that can move axially relative to the other end of the first cylinder is slidably engaged with it. A locking hole is formed on the surface of the conveyor belt to rotate and screw into the locking rod. A washer is fixedly fitted to the outside of the pressure-bearing rod, and a second spring is fitted to the outside of the pressure-bearing rod. When the first clamping rod presses against the pressure-bearing rod, the second spring is in a state of tensile deformation. A third spring is provided between the end of the locking rod away from the conveyor belt and the inner wall of the first cylinder.

2. The closed-type pyrolysis conveying system for battery recycling as described in claim 1, characterized in that, The substrate has a groove, and a slider is slidably disposed in the groove. The slider is sleeved and fixed to the outside of the first movable rod. A first spring is sleeved on the outside of the first movable rod. The two ends of the first spring are respectively connected to the outer wall of the slider and the groove wall. When the first spring is not deformed, the end of the first movable rod away from the first locking hole extends into the first positioning hole.

3. The closed-type pyrolysis conveying system for battery recycling as described in claim 1, characterized in that, A first conical tooth is fixedly sleeved on the outer side of the first cylindrical body. A first fixing plate is fixed on the base plate. A second cylindrical body is rotatably mounted on the first fixing plate. A second conical tooth that mates with the first conical tooth is provided at one end of the second cylindrical body. A screw is threaded into the other end of the second cylindrical body. A second fixing plate is provided at one end of the screw. A telescopic rod is provided between the first fixing plate and the second fixing plate. A third locking rod is provided on one side of the second fixing plate. A second movable rod parallel to the axial direction of the positioning post is slidably and elastically inserted into the positioning post. One end of the second movable rod extends into the slot and contacts and engages with the first movable rod. A third locking hole is provided on the second movable rod to engage with the third locking rod.

4. The closed-type pyrolysis conveying system for battery recycling as described in claim 3, characterized in that, The positioning column is equipped with a pad, and a fourth spring is provided between one side of the pad and the other end of the second movable rod. When the first movable rod presses the second movable rod, the fourth spring is in a compressed deformation state.

Images