Continuous nitrogen rapid replacement device for crushing waste lithium battery

Abstract

The utility model discloses a continuous nitrogen quick replacement device for crushing a waste lithium battery, which relates to the technical field of waste lithium battery recovery and comprises a shell, a replacement chamber arranged in the shell, a driving component arranged at the top of the shell, an impeller coaxially arranged in the replacement chamber and rotatably and hermetically connected with the replacement chamber, and the impeller is connected with the driving component. The feeding port is formed in the top of the shell, the discharging port is formed in the bottom of the shell, the discharging port and the feeding port are arranged in a staggered mode, and the multiple gas circulation assemblies are annularly arranged on the shell; according to the continuous nitrogen rapid replacement device for crushing the waste lithium batteries, continuous feeding of the waste lithium batteries can be achieved, nitrogen replacement is conducted on the waste lithium batteries before the waste lithium batteries are crushed, so that the fire and explosion risks during battery crushing are reduced, production safety is guaranteed, meanwhile, the size of a nitrogen replacement facility is reduced on the premise that the productivity is not affected, and the production cost is reduced. The overall equipment height and occupied area are reduced, and the space utilization rate is increased.

Description

Technical Field

[0001] This utility model relates to the field of waste lithium battery recycling technology, specifically a continuous nitrogen rapid replacement device for crushing waste lithium batteries. Background Technology

[0002] In the lithium battery dismantling and recycling industry, the first step in all processes is to initially crush the recycled waste lithium batteries. Since the sources of recycled batteries are diverse, some batteries may be fully charged. If they are crushed directly, the batteries may catch fire due to short circuits. At the same time, the released electrolyte will further accelerate the combustion of the batteries. In the confined space of the crusher, there is also the possibility of flash explosion, which is extremely risky.

[0003] To mitigate the risk, inert gases (usually nitrogen) are typically filled into the crusher to dilute the oxygen content and reduce the risk of fire. However, in actual production, due to the continuous operation of the production line, waste lithium batteries are continuously fed into the crusher manually or via conveyor belt. The feed end of the crusher is difficult to seal, and air continuously enters the crusher along with the waste batteries. This makes it difficult for the nitrogen filling the crusher to reduce the oxygen content to an extremely low level, thus failing to effectively provide protection.

[0004] The commonly used method in the market is to add a nitrogen replacement chamber at the crusher inlet, consisting of three pneumatic valves and two sets of chambers, for pretreatment. However, the replacement chamber currently in use operates intermittently, resulting in low efficiency. At the same time, the automatic front-end feeding equipment needs to be started frequently, resulting in high equipment start-up load. This not only affects the service life but may also lead to material shortages in a certain cycle due to untimely manual feeding, thus failing to meet the overall production line capacity.

[0005] To ensure overall production capacity, continuous production lines often require very large replacement chambers, which leads to longer nitrogen replacement times, typically requiring a design margin of 2-3 times or more. Furthermore, due to their vertical layout, the presence of multi-stage crushing equipment below the nitrogen replacement chamber results in a relatively high overall equipment height, significantly impacting the overall layout of the production line. Utility Model Content

[0006] The purpose of this invention is to provide a continuous nitrogen rapid replacement device for crushing waste lithium batteries. It can realize continuous feeding of waste lithium batteries and replace them with nitrogen before crushing to reduce the risk of fire and explosion during battery crushing, ensure production safety, and at the same time reduce the volume of nitrogen replacement facilities, reduce the overall equipment height and floor space, and improve space utilization without affecting production capacity.

[0007] The above-mentioned optimized structure of this utility model is achieved through the following technical solution: a continuous nitrogen rapid replacement device for crushing waste lithium batteries, including a shell;

[0008] A displacement chamber, wherein the displacement chamber is disposed within the housing;

[0009] A drive assembly is disposed on the top of the housing;

[0010] An impeller is coaxially disposed within the displacement chamber and rotatably and sealed to the displacement chamber; the impeller is connected to the drive assembly.

[0011] A feed inlet is located at the top of the housing;

[0012] The discharge port is located at the bottom of the housing and is offset from the inlet port;

[0013] Multiple gas flow components are arranged in a ring on the housing.

[0014] In some embodiments, the drive assembly includes a motor disposed on the top of the housing;

[0015] A speed reducer is located on the top of the housing and is connected to the motor and the impeller.

[0016] In some embodiments, the impeller includes a rotating shaft, the bottom end of which is rotatably connected to the bottom wall of the replacement chamber, and the top end of which passes through the housing and is connected to the drive assembly;

[0017] Multiple blades are arranged in a ring on the rotating shaft, and the gas flow assembly is provided between two adjacent blades.

[0018] In some embodiments, the impeller further includes a sealing strip disposed between the blade and the inner wall of the displacement chamber.

[0019] In some embodiments, the housing includes a cylindrical body;

[0020] A top cover plate is provided on the top of the cylinder, and the top cover plate is provided with the feed inlet;

[0021] The lower cover plate is sealed at the bottom of the cylinder and has the discharge port. The drive assembly is provided between the upper cover plate and the lower cover plate.

[0022] In some embodiments, the gas flow assembly includes an inlet pipe disposed on the cylinder and communicating with the displacement chamber;

[0023] An exhaust pipe is provided on the upper cover plate and communicates with the replacement chamber.

[0024] In some embodiments, the gas flow assembly further includes a gas analyzer, which is mounted on the cylinder and can monitor the oxygen content of the gas in the replacement chamber.

[0025] In some embodiments, the feed inlet is one of the air outlet pipes.

[0026] In some embodiments, a blade is provided between the feed inlet and the discharge outlet.

[0027] In summary, this utility model has the following beneficial effects:

[0028] This invention enables continuous feeding of waste lithium batteries through the cooperation of impeller rotation and multiple gas flow components. It also replaces the waste lithium batteries with nitrogen before crushing, ensuring that the oxygen content of the waste lithium batteries is reduced to below a safe level before entering the crushing equipment. This reduces the risk of fire and explosion during battery crushing and ensures production safety.

[0029] This invention uses an impeller rotation method to achieve continuous conveying and nitrogen replacement of waste lithium batteries. Compared with the traditional intermittent replacement chamber, it improves work efficiency, avoids frequent start-ups of feeding equipment, extends equipment service life, and ensures continuous and stable operation of the production line.

[0030] This invention reduces the volume of nitrogen replacement facilities without affecting production capacity, effectively lowering the overall equipment height and floor space, and improving space utilization. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of this utility model;

[0032] Figure 2 This is a structural schematic diagram from another perspective of the present invention;

[0033] Figure 3 This is a cross-sectional view of the present invention;

[0034] Figure 4 This is a vertical sectional view of the present invention.

[0035] In the diagram: 1. Shell; 11. Cylinder; 12. Upper cover plate; 13. Lower cover plate; 2. Replacement chamber; 3. Drive assembly; 31. Motor; 32. Reducer; 4. Impeller; 41. Rotating shaft; 42. Blade; 43. Sealing strip; 5. Feed inlet; 6. Discharge outlet; 7. Gas flow assembly; 71. Inlet pipe; 72. Outlet pipe; 73. Gas analyzer. Detailed Implementation

[0036] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0037] refer to Figure 1-4 A continuous nitrogen rapid replacement device for crushing waste lithium batteries includes a shell 1, a replacement chamber 2, a drive assembly 3, an impeller 4, a feed inlet 5, a discharge outlet 6, and multiple gas flow components 7. The shell 1 serves as the external frame of the entire device, protecting and supporting the internal components. The replacement chamber 2 is located inside the shell 1 and is the main space for nitrogen replacement. The drive assembly 3 is located at the top of the shell 1 and provides power for the impeller 4 to rotate. The impeller 4 is coaxially arranged inside the replacement chamber 2, dividing the replacement chamber 2 into multiple replacement zones. The impeller 4 rotates in relation to the replacement chamber 2. The dynamic sealing connection ensures the relative independence of multiple replacement zones. The impeller 4 is connected to the drive assembly 3 and can rotate under the drive of the drive assembly 3. The feed port 5 is located at the top of the housing 1 for feeding waste lithium batteries. The discharge port 6 is located at the bottom of the housing 1 for discharging waste lithium batteries after nitrogen replacement. The discharge port 6 and the feed port 5 are staggered to ensure that the waste lithium batteries can move along a predetermined path in the replacement chamber 2. Multiple gas flow components 7 are arranged in a ring on the housing 1 for the entry and exit of nitrogen, thereby realizing the replacement of gas in the replacement chamber 2.

[0038] In some embodiments, the drive assembly 3 includes a motor 31 and a reducer 32. Both the motor 31 and the reducer 32 are located on the top of the housing 1. The motor 31 is connected to the impeller 4 through the reducer 32. The motor 31 can provide the original power, and the speed of the motor 31 is adjusted by the reducer 32 so that it outputs a speed suitable for the operation of the impeller 4, thereby stably driving the impeller 4 to rotate.

[0039] In some embodiments, the impeller 4 includes a rotating shaft 41 and a plurality of blades 42. The bottom end of the rotating shaft 41 is rotatably connected to the bottom wall of the displacement chamber 2, and the top end of the rotating shaft 41 passes through the housing 1 and is connected to the drive assembly 3. The plurality of blades 42 are arranged in a ring on the rotating shaft 41, which can divide the displacement chamber 2 into a plurality of displacement zones. The rotating shaft 41 can provide support and transmission for the rotation of the impeller 4. A gas flow assembly 7 is provided between two adjacent blades 42 to realize gas displacement in each displacement zone.

[0040] In some embodiments, the impeller 4 further includes a sealing strip 43, which is disposed between the blade 42 and the inner wall of the replacement chamber 2. The sealing strip 43 can ensure the sealing between each replacement zone of the impeller 4, prevent gas leakage between each replacement zone, and ensure the effect of nitrogen replacement.

[0041] In some embodiments, the housing 1 includes a cylinder 11, an upper cover plate 12, and a lower cover plate 13. The upper cover plate 12 is sealed at the top of the cylinder 11, and the lower cover plate 13 is sealed at the bottom of the cylinder 11, so that the cylinder 11, the upper cover plate 12, and the lower cover plate 13 form a relatively closed space. The upper cover plate 12 is provided with a feed inlet 5, and the lower cover plate 13 is provided with a discharge outlet 6. A drive assembly 3 is provided between the upper cover plate 12 and the lower cover plate 13, and the drive assembly 3 can provide power for the operation of the entire device.

[0042] In some embodiments, the gas flow assembly 7 includes an inlet pipe 71 and an outlet pipe 72. The inlet pipe 71 is disposed on the cylinder 11 and communicates with the replacement chamber 2, and is used to transport nitrogen into the replacement chamber 2. The outlet pipe 72 is disposed on the upper cover plate 12 and communicates with the replacement chamber 2, and is used to discharge the mixed gas in the replacement chamber to achieve continuous gas replacement.

[0043] In some embodiments, the gas flow assembly 7 further includes a gas analyzer 73, which is mounted on the cylinder 11. The gas analyzer 73 monitors the oxygen content of the gas in each replacement zone, providing data support for the nitrogen replacement process. This allows for timely adjustment of the nitrogen injection volume and replacement time. Furthermore, if oxygen replacement is completed ahead of schedule, nitrogen injection can be reduced or stopped in subsequent replacement zones, avoiding waste caused by ineffective nitrogen injection and reducing operating costs. The gas analyzer 73 can be an infrared analyzer, ensuring that its measuring end does not protrude from the inner wall of the cylinder 11, thus preventing interference with the rotation of the impeller 4.

[0044] In some embodiments, the feed inlet 5 is one of the air outlet pipes 72, which can allow the air brought in when the waste lithium battery enters the replacement chamber 2 to be discharged in a timely manner, thereby improving the efficiency of nitrogen replacement.

[0045] In some embodiments, a blade 42 is provided between the inlet 5 and the outlet 6. The blade 42 between the inlet 5 and the outlet 6 can ensure the separation of the waste lithium batteries between the inlet 5 and the outlet 6, ensure that the material moves along a predetermined path in the replacement chamber 2, and at the same time ensure the airtightness between the inlet 5 and the outlet 6. It can also maximize the movement path of the waste lithium batteries in the replacement chamber 2 and reduce the oxygen content in the gas of the waste lithium batteries after replacement.

[0046] The specific working principle is as follows:

[0047] In actual operation, the motor 31 starts, and after the speed is adjusted by the reducer 32, it drives the rotating shaft 41 of the impeller 4 to rotate, which in turn drives the blades 42 to rotate clockwise in the replacement chamber 2.

[0048] Waste lithium batteries enter the replacement chamber 2 through the inlet 5. Since there is a blade 42 between the inlet 5 and the outlet 6, the waste lithium batteries pass through multiple independent replacement zones separated by the blade 42 in sequence.

[0049] During the operation of waste lithium batteries, each replacement zone has an independent gas flow component 7 in operation. Nitrogen gas enters each replacement zone of the replacement chamber 2 through the inlet pipe 71, diluting and expelling the oxygen in the air brought in by the material from the inlet 5, and the mixed gas is discharged through the outlet pipe 72. After multiple stages of replacement in multiple replacement zones, the oxygen content carried by the replacement zones gradually decreases.

[0050] Finally, the material, after being fully purged with nitrogen, falls from outlet 6 and enters the next crushing process. This achieves continuous and rapid nitrogen purging of waste lithium batteries before crushing, effectively reducing the risk of fire and explosion during battery crushing.

[0051] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A continuous nitrogen rapid replacement device for crushing waste lithium batteries, characterized in that: Includes the housing (1); Replacement chamber (2), wherein the replacement chamber (2) is disposed within the shell (1); A drive assembly (3) is disposed on the top of the housing (1); Impeller (4), the impeller (4) is coaxially disposed in the displacement chamber (2) and is rotatably and sealedly connected to the displacement chamber (2), the impeller (4) is connected to the drive assembly (3); The feed inlet (5) is located at the top of the housing (1); The discharge port (6) is located at the bottom of the housing (1) and is offset from the inlet port (5); Multiple gas flow components (7) are arranged in a ring on the housing (1).

2. The continuous nitrogen rapid replacement device for crushing waste lithium batteries according to claim 1, characterized in that: The drive assembly (3) includes a motor (31) which is located on the top of the housing (1); The speed reducer (32) is located on the top of the housing (1) and is connected to the motor (31) and the impeller (4).

3. The continuous nitrogen rapid replacement device for crushing waste lithium batteries according to claim 1, characterized in that: The impeller (4) includes a rotating shaft (41), the bottom end of which is rotatably connected to the bottom wall of the displacement chamber (2), and the top end of which penetrates the housing (1) and is connected to the drive assembly (3). Multiple blades (42) are arranged in a ring on the rotating shaft (41), and the gas flow assembly (7) is provided between two adjacent blades (42).

4. The continuous nitrogen rapid replacement device for crushing waste lithium batteries according to claim 3, characterized in that: The impeller (4) also includes a sealing strip (43), which is disposed between the blade (42) and the inner wall of the displacement chamber (2).

5. The continuous nitrogen rapid replacement device for crushing waste lithium batteries according to claim 1, characterized in that: The housing (1) includes a cylindrical body (11); The upper cover plate (12) is sealed on the top of the cylinder (11), and the upper cover plate (12) is provided with the feed inlet (5). The lower cover plate (13) is sealed at the bottom of the cylinder (11), and the lower cover plate (13) is provided with the discharge port (6), and the drive assembly (3) is provided between the upper cover plate (12) and the lower cover plate (13).

6. The continuous nitrogen rapid replacement device for crushing waste lithium batteries according to claim 5, characterized in that: The gas flow assembly (7) includes an air inlet pipe (71), which is located on the cylinder (11) and communicates with the displacement chamber (2); An exhaust pipe (72) is provided on the upper cover plate (12) and is connected to the replacement chamber (2).

7. A continuous nitrogen rapid replacement device for crushing waste lithium batteries according to claim 6, characterized in that: The gas flow assembly (7) also includes a gas analyzer (73), which is mounted on the cylinder (11) and can monitor the oxygen content of the gas in the replacement chamber (2).

8. A continuous nitrogen rapid replacement device for crushing waste lithium batteries according to claim 6, characterized in that: The feed inlet (5) is one of the air outlet pipes (72).

9. A continuous nitrogen rapid replacement device for crushing waste lithium batteries according to claim 3, characterized in that: A blade (42) is provided between the feed inlet (5) and the discharge outlet (6).

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