A lithium battery anode material crushing and drying system

Abstract

This utility model discloses a lithium-ion battery anode raw material crushing and drying system, belonging to the field of lithium-ion battery material processing technology. It includes raw material processing equipment, which comprises a raw material conveying device, a crushing device, a drying device, and a raw material storage device connected in sequence. The drying system includes two sets of raw material processing equipment. The outlets of the crushing devices of the two sets of raw material processing equipment are connected to three-way valves via the crushed material conveying device. One outlet of the three-way valve is connected to the corresponding drying device of each set of raw material processing equipment, and the other outlet is connected to a belt conveyor. Both ends of the belt conveyor are connected to the drying devices of one set of raw material processing equipment. This utility model uses two sets of crushing and drying equipment to process lithium-ion battery anode raw materials, and through the structural layout of the production line, it achieves the interactivity of the two sets of equipment, improving production efficiency while ensuring the effective operation of the production line in the event of a failure of a single set of equipment.

Description

Technical Field

[0001] This utility model belongs to the field of lithium battery material processing technology, and more specifically, relates to a lithium battery anode raw material crushing and drying system. Background Technology

[0002] Lithium-ion battery anode materials are a crucial component of lithium-ion batteries, and the quality of raw material processing is key to determining the quality of the anode materials and the final product. Currently, the common practice in the lithium-ion battery anode material industry is to crush the raw materials using a jaw crusher followed by stirring and drying. A power structure drives two stirring mechanisms to rotate and agitate the material within the drying chamber. Once drying is complete, a rotating mechanism pushes the material out. This process is cumbersome, easily damages the material's shape during ejection, and is structurally fragile, resulting in low production efficiency.

[0003] For example, Chinese patent application number CN202022475605.X, published on June 1, 2021, discloses a drying device for producing lithium-ion battery anode materials. The device includes a base plate and a stirring tank and a condensing tank fixedly mounted above the base plate. A stirring shaft is rotatably mounted on the inner wall of the stirring tank, and several stirring devices are fixedly mounted on the stirring shaft. Two drying devices are arranged above the stirring tank, and each stirring device includes a connecting block fixedly mounted on the stirring shaft. This lithium-ion battery anode material drying device uses a traditional stirring drying device, which suffers from the aforementioned problems of cumbersome operation and easy damage to the material's shape during material ejection.

[0004] Chinese patent application number CN202210720355.2, published on January 17, 2023, discloses a complete set of equipment for crushing and sorting waste lithium batteries, relating to the field of waste lithium battery processing technology. This complete set of equipment includes a primary crusher and a pulse dust collector. The bottom discharge port of the primary crusher is fixedly connected to the top feed port of a secondary crusher. A first screw conveyor is installed at the rear of the secondary crusher, and a drying drum screen is installed at the discharge port of the first screw conveyor. A vibrating screen is installed at the rear discharge port of the drying drum screen, and a belt magnetic separator is installed at the rear of the vibrating screen. Compared with traditional stirring and drying devices, this lithium battery crushing and sorting equipment avoids the problems of traditional stirring and drying devices by adopting a drying drum structure. However, this solution, as well as existing lithium-ion battery anode material processing equipment, all rely on a single set of equipment to process the lithium-ion battery anode material. In actual production, if any part of the equipment malfunctions, the entire production line must be shut down for repair, impacting production progress. Furthermore, single-set crushing and drying equipment also suffers from low production efficiency, making it difficult to meet current capacity demands. Summary of the Invention

[0005] 1. The problem to be solved To address the problem that existing lithium-ion battery anode material processing equipment uses only a single set of equipment, resulting in low production efficiency and requiring the entire production line to shut down for maintenance if a problem occurs in one part of the equipment, this utility model provides a lithium-ion battery anode material crushing and drying system. This system uses two sets of crushing and drying equipment to process lithium-ion battery anode materials, and the interaction between the two sets of equipment is achieved through the structural layout of the production line. This improves production efficiency while ensuring the effective operation of the production line in the event of a failure in one set of equipment.

[0006] 2. Technical Solution To solve the above problems, the present invention adopts the following technical solution.

[0007] A lithium-ion battery anode raw material crushing and drying system includes raw material processing equipment, which includes a raw material conveying device, a crushing device, a drying device, and a raw material storage device connected in sequence. The drying system includes two sets of raw material processing equipment. The outlets of the crushing devices of the two sets of raw material processing equipment are connected to three-way valves through the crushed material conveying device. One outlet of the three-way valve is connected to the drying device corresponding to each set of raw material processing equipment, and the other outlet is connected to a belt conveyor. The two ends of the belt conveyor are respectively connected to the drying devices of one set of raw material processing equipment.

[0008] As a further improvement to the technical solution, the drying device and the raw material storage device are connected by a drying material conveying pipeline, and the drying material conveying pipeline is equipped with a pneumatic conveying device. The drying material conveying pipelines of the two sets of raw material processing equipment are connected by a drying material transfer pipeline.

[0009] As a further improvement to the technical solution, the drying material transfer pipeline is equipped with a pneumatic conveying device.

[0010] As a further improvement to the technical solution, a raw material screening device is provided between the raw material conveying device and the crushing device.

[0011] As a further improvement to the technical solution, the raw material screening equipment includes a grid hopper and a vibrating feeder; the vibrating feeder is installed at the outlet of the grid hopper and is connected to the crushing device through a screening material conveying device.

[0012] As a further improvement to the technical solution, an electromagnetic iron separator is installed at the inlet of the crushing device.

[0013] As a further improvement to the technical solution, the crushed material conveying device is equipped with a drawer-type iron separator.

[0014] As a further improvement to the technical solution, the drying device adopts a paddle dryer.

[0015] As a further improvement to the technical solution, the air outlet of the drying device is connected to a filter device, the filter device is externally connected to a fan, and the discharge port of the filter device is connected to a raw material storage device.

[0016] As a further improvement to the technical solution, the crushing device adopts a double roll crusher.

[0017] 3. Beneficial effects Compared with the prior art, the beneficial effects of this utility model are as follows: (1) The present invention provides a lithium battery anode raw material crushing and drying system, which differs from the traditional single set of raw material processing equipment. It uses two sets of raw material processing equipment to process lithium battery anode raw materials, which can effectively improve production efficiency. In particular, it is equipped with a belt conveyor between the two sets of raw material processing equipment and between the crushing device and the drying device of each set of raw material processing equipment. The belt conveyor can realize the interaction between the two sets of equipment. When the crushing device of one set of raw material processing equipment fails, the conveying capacity of the crushing device and the raw material conveyor of the other set of raw material processing equipment can be temporarily increased, and the raw material can be distributed to the drying device of the two sets of raw material processing equipment for drying through the belt conveyor. When the drying device of one set of raw material processing equipment fails, the raw material crushed by the set of raw material processing equipment can also be transferred to the drying device of the other set of raw material processing equipment for drying through the belt conveyor. Through this interactive design, the effective operation of the production line is guaranteed when a single set of equipment fails. (2) The present invention provides a lithium battery anode raw material crushing and drying system. The raw material storage devices of two sets of raw material processing equipment are connected by a drying material transfer pipeline. When the raw material storage device of one set of raw material processing equipment fails or is full, the drying material can be transferred through the drying material transfer pipeline to ensure the effective operation of the system. A spare pneumatic conveying device is installed in the drying material transfer pipeline to ensure the normal transfer of the drying material. (3) The present invention provides a lithium battery anode raw material crushing and drying system. By setting a raw material screening device between the raw material conveying device and the crushing device, the raw material can be preliminarily screened to avoid excessively large raw materials from entering between the crushing devices and affecting the raw material crushing operation. (4) The present invention provides a lithium battery anode raw material crushing and drying system, wherein iron removers are installed at both the inlet and outlet of the crushing device. The iron remover at the inlet can initially remove magnetic materials in the raw material, while the iron remover at the outlet can further remove the magnetic materials that are difficult to remove after the raw material is crushed, thereby improving the removal effect. In addition, the iron remover at the outlet adopts a drawer-type iron remover, which is more convenient to operate. (5) The present invention provides a lithium battery anode raw material crushing and drying system. The drying device adopts a paddle dryer, which avoids the problem that traditional stirring drying devices are prone to damage to materials. It uses steam heat exchange, and the moisture content of the material after treatment is only 2%, which ensures the quality of the product. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a lithium battery anode raw material crushing and drying system according to the present invention; In the diagram: 1. Raw material conveying device; 2. Crushing device; 3. Drying device; 4. Raw material storage device; 5. Belt conveyor; 6. Pneumatic conveying device; 7. Dry material conveying pipeline; 8. Dry material transfer pipeline; 9. Grating hopper; 10. Vibrating feeder; 11. Electromagnetic separator; 12. Drawer-type separator; 13. Filtering device; 14. Fan; 15. Crushed material conveying device; 16. Screened material conveying device; 17. Buffer silo. Detailed Implementation

[0019] Exemplary embodiments of the present invention are described in detail below. While these exemplary embodiments have been described in sufficient detail to enable those skilled in the art to practice the present invention, it should be understood that other embodiments may be implemented and various changes may be made to the present invention without departing from its spirit and scope. The more detailed description of embodiments of the present invention below is not intended to limit the scope of the claimed invention, but is merely illustrative and does not limit the description of the features and characteristics of the invention, in order to provide the best mode for carrying out the invention and sufficient to enable those skilled in the art to practice it. Therefore, the scope of the present invention is defined only by the appended claims.

[0020] Example 1 A lithium battery anode raw material crushing and drying system is used in the lithium battery production process to pre-treat lithium battery anode raw materials. Its specific structure and technical effects are described in detail below.

[0021] like Figure 1 As shown, the system includes two sets of raw material processing equipment. Each set of raw material processing equipment includes a raw material conveying device 1, a crushing device 2, a drying device 3, and a raw material storage device 4 connected in sequence.

[0022] Specifically, the raw material conveying device 1 uses a grab bucket crane to grab the raw materials. A raw material screening device is installed between the raw material conveying device 1 and the crushing device 2 to perform preliminary screening of the raw materials, preventing excessively large materials from entering the crushing area and affecting the crushing operation. The raw material screening device includes a grid hopper 9 and a vibrating feeder 10. The vibrating feeder 10 is installed at the outlet of the grid hopper 9, and a bar valve is installed between the grid hopper 9 and the vibrating feeder 10 for control. The screened raw materials are then connected to the crushing device 2 via a screened material conveying device 16. The crushing device 2 is connected to a buffer silo 17 via a crushed material conveying device 15. The buffer silo 17 then transfers the raw materials to the drying device 3 via a conveying device. The dried raw materials finally enter the raw material storage device 4.

[0023] In this embodiment, the crushing device 2 adopts a double-roll crusher, which can solve the problems of high proportion of crushed powder and low crushing efficiency. Both the crushed material conveying device 15 and the screening material conveying device 16 adopt large-angle belt conveyors, which can effectively save floor space and installation space, and improve conveying efficiency.

[0024] Drying unit 3 employs a paddle dryer, a horizontal, stirred dryer that primarily utilizes heat conduction. Because its internal hollow stirring blades resemble oars, it is also called a hollow paddle dryer. The main structure consists of a W-shaped jacketed shell containing pairs of hollow, low-speed rotating shafts, with several stirring blades welded onto the shafts. Heat carriers flow through both the jacket and the hollow stirring blades, allowing for simultaneous heating of the material from both heating surfaces. Wedge-shaped hollow blades are densely arranged on the hollow shafts, through which the heat medium flows. This dryer boasts a large heat transfer area per unit effective volume, employing steam heat exchange. After treatment, the material's moisture content is reduced to 2%, effectively ensuring product quality.

[0025] The air outlet of the drying device 3 is connected to a filter device 13, which is externally connected to a fan 14. The discharge outlet of the filter device 13 is connected to a raw material storage device 4. In this embodiment, the filter device 13 can be a commercially available dust collector such as a bag filter. The filter device 13 can filter and collect the raw materials mixed in with the gas, preventing the raw materials from escaping into the environment with the gas and avoiding waste of raw materials.

[0026] Under normal operating conditions, the two sets of raw material processing equipment can process lithium battery anode raw materials simultaneously, thereby effectively improving production efficiency. When a device in one set of equipment fails, the other set of equipment can take over part of the work of the failed device, ensuring the effective operation of the production line; that is, there is interaction between the two sets of equipment.

[0027] To address the above requirements, this embodiment includes the following structure. The outlets of the crushing devices 2 of the two sets of raw material processing equipment are connected to the inlets of three-way valves via the crushed material conveying device 15. One outlet of the three-way valve is connected to the drying device 3 corresponding to each set of raw material processing equipment, and the other outlet is connected to the belt conveyor 5. Both ends of the belt conveyor 5 are connected to the inlets of the drying devices 3 of one set of raw material processing equipment.

[0028] When the raw material conveying device 1 or crushing device 2 of one set of raw material processing equipment malfunctions, the conveying capacity of the raw material conveying device 1 or crushing device 2 of the other set of raw material processing equipment can be temporarily increased, and the raw materials can be distributed to the drying devices 3 of the two sets of raw material processing equipment via belt conveyor 5 for drying. Conversely, when the drying device 3 of one set of raw material processing equipment malfunctions, the crushed raw materials from that set can also be transferred to the drying device 3 of the other set of raw material processing equipment via belt conveyor 5 for drying. This interactive design ensures the effective operation of the production line even when a single set of equipment fails.

[0029] In this embodiment, the belt conveyor device 5 adopts a high-precision quantitative feeding and weighing belt conveyor, which can accurately control the drying feed amount and avoid uneven material jamming.

[0030] Furthermore, in this embodiment, the drying device 3 and the raw material storage device 4 are connected by a drying material conveying pipe 7, which is equipped with a pneumatic conveying device 6 to ensure that the dried material can be smoothly conveyed into the raw material storage device 4. In order to further realize the interactivity between the two sets of raw material processing equipment, the drying material conveying pipes 7 of the two sets of raw material processing equipment in this embodiment are connected by a drying material transfer pipe 8, which is equipped with a pneumatic conveying device 6.

[0031] When the raw material storage device 4 of one of the raw material processing equipment malfunctions or is full, the dried material can be transferred through the drying material transfer pipeline 8 to ensure the effective operation of the system. The spare pneumatic conveying device 6 on the drying material transfer pipeline 8 can be activated when the original pneumatic conveying device 6 is not conveying well to ensure the normal transfer of the dried material.

[0032] It is worth mentioning that in this embodiment, magnetic separators are installed at both the inlet and outlet of the crushing device 2, achieving two-stage demagnetization of the raw materials. Specifically, an electromagnetic magnetic separator 11 is installed at the inlet of the crushing device 2, while a drawer-type magnetic separator 12 is installed at the outlet of the crushed material conveying device 15. The magnetic separator at the inlet can initially remove magnetic materials from the raw materials, while the magnetic separator at the outlet can further remove hidden and difficult-to-remove magnetic materials after the raw materials are crushed, improving the removal effect. Moreover, the drawer-type magnetic separator 12 at the outlet makes operation more convenient.

[0033] In summary, the lithium battery anode raw material crushing and drying system of this embodiment uses two sets of crushing and drying equipment to process the lithium battery anode raw materials. The interaction between the two sets of equipment is achieved through the structural layout of the production line, which improves production efficiency and ensures the effective operation of the production line when one set of equipment fails.

Claims

1. A lithium battery anode raw material crushing and drying system, comprising raw material processing equipment, wherein the raw material processing equipment comprises a raw material conveying device (1), a crushing device (2), a drying device (3), and a raw material storage device (4) connected in sequence, characterized in that: The drying system includes two sets of raw material processing equipment; the outlets of the crushing devices (2) of the two sets of raw material processing equipment are connected to a three-way valve through the crushed material conveying device (15). One outlet of the three-way valve is connected to the drying device (3) corresponding to each set of raw material processing equipment, and the other outlet is connected to the belt conveyor (5). The two ends of the belt conveyor (5) are respectively connected to the drying device (3) of a set of raw material processing equipment.

2. The lithium battery anode raw material crushing and drying system according to claim 1, characterized in that: The drying device (3) and the raw material storage device (4) are connected by a drying material conveying pipe (7), and the drying material conveying pipe (7) is equipped with a pneumatic conveying device (6). The drying material conveying pipes (7) of the two sets of raw material processing equipment are connected by a drying material transfer pipe (8).

3. The lithium battery anode raw material crushing and drying system according to claim 2, characterized in that: The drying material transfer pipeline (8) is equipped with a pneumatic conveying device (6).

4. The lithium battery anode raw material crushing and drying system according to claim 1, characterized in that: A raw material screening device is provided between the raw material conveying device (1) and the crushing device (2).

5. The lithium battery anode raw material crushing and drying system according to claim 4, characterized in that: The raw material screening equipment includes a grid hopper (9) and a vibrating feeder (10); the vibrating feeder (10) is installed at the outlet of the grid hopper (9) and is connected to the crushing device (2) through the screening material conveying device (16).

6. The lithium battery anode raw material crushing and drying system according to claim 1, characterized in that: An electromagnetic separator (11) is installed at the inlet of the crushing device (2).

7. The lithium battery anode raw material crushing and drying system according to claim 6, characterized in that: The crushed material conveying device (15) is equipped with a drawer-type iron separator (12).

8. A lithium-ion battery anode material crushing and drying system according to any one of claims 1-7, characterized in that: The drying device (3) is a paddle dryer.

9. The lithium battery anode raw material crushing and drying system according to claim 8, characterized in that: The air outlet of the drying device (3) is connected to a filter device (13), the filter device (13) is connected to a fan (14), and the discharge outlet of the filter device (13) is connected to a raw material storage device (4).

10. A lithium-ion battery anode material crushing and drying system according to any one of claims 1-7, characterized in that: The crushing device (2) is a double roll crusher.

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