A granule recovery device and drying system

Abstract

This utility model discloses a particle recycling device and drying system, relating to the field of lithium-ion battery manufacturing technology. The particle recycling device includes a housing, a first transport component, and a second transport component. The housing has a feeding port, a liquid injection port, and an inspection port. The feeding port receives the particles to be recycled, the liquid injection port is configured to inject liquid into the housing, and the inspection port is configured to remove the particles for inspection. The first transport component is connected to the housing and includes a first pipe and a fan mounted on the first pipe. The second transport component is also connected to the housing and includes a second pipe and a first pump mounted on the second pipe. This particle recycling device can automatically collect particles and transfer them to appropriate processes based on their quality, reducing the workload of operators, increasing efficiency, and lowering costs.

Description

Technical Field

[0001] This utility model relates to the field of lithium-ion battery manufacturing technology, and in particular to a particle recovery device and drying system. Background Technology

[0002] In the preparation of the precursor of the cathode material, a rotary kiln is needed to calcine the precursor generated after co-precipitation to dry it. In order to reduce the humidity in the rotary kiln, a negative pressure mechanism is needed to extract the humid gas inside the rotary kiln. At the same time, the precursor particles floating in the gas inside the rotary kiln are also extracted.

[0003] To prevent environmental pollution, dust collection components are needed to remove dust from the gas extracted by the negative pressure mechanism, and ton bags are used to collect the particles remaining in the dust collection components and transport them to a designated location for recycling, thereby improving the utilization rate and reducing costs. However, using ton bags to collect powder is inefficient and requires a high level of labor intensity for operators. Utility Model Content

[0004] The purpose of this invention is to provide a particle recovery device and drying system that can automatically collect particles and transfer them to appropriate processes based on their quality, thereby reducing the workload of operators, increasing efficiency, and lowering costs.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A pellet recovery device, comprising:

[0007] The container has a feeding port, a liquid injection port and an inspection port. The feeding port is used to receive the recycled particles, the liquid injection port is configured to inject liquid into the container, and the inspection port is configured to remove the particles for inspection.

[0008] A first transport component is connected to the container body, and the first transport component includes a first pipe and a fan disposed on the first pipe;

[0009] A second transport component is connected to the housing, and the second transport component includes a second pipe and a first pump body disposed on the second pipe.

[0010] As an optional solution for the above-mentioned particle recycling device, the inspection port is opened on the top surface of the box, and the box is provided with an inspection door to open or close the inspection port.

[0011] As an optional solution for the above-mentioned particle recovery device, the particle recovery device further includes a backflushing assembly, which includes a second pump body and a backflushing pipe. One end of the backflushing pipe is connected to the second pump body, and the other end of the backflushing pipe is connected to the second pipeline. The second pump body can drive liquid into the second pipeline.

[0012] As an optional embodiment of the above-mentioned particle recovery device, the second transport component further includes a switching valve, which is disposed in the second pipeline, and the connection point between the backflushing pipe and the second pipeline is located between the switching valve and the housing.

[0013] As an optional solution for the above-mentioned particle recycling device, the particle recycling device further includes a three-way switching valve. The housing has a discharge port, and the three-way switching valve is located at the discharge port. Both the first pipe and the second pipe are connected to the three-way switching valve, so that the housing can be connected to the first pipe and one of the second pipes.

[0014] As an optional solution to the above-mentioned particle recycling device, the particle recycling device further includes a stirring assembly, which includes a driving component and a stirring paddle. The stirring paddle is located inside the housing, and the driving component is disposed in the housing and connected to the stirring paddle to drive the stirring paddle to rotate.

[0015] As an optional solution to the above-mentioned particle recovery device, the particle recovery device further includes a level gauge, which is detachably connected to the tank and configured to detect the liquid level height inside the tank.

[0016] A drying system includes the aforementioned particle recovery device and a dust removal component. The dust removal component includes a housing with an air inlet, an air outlet, and a material discharge port. A plurality of filter elements are disposed between the air inlet and the air outlet, and the material discharge port is located below the plurality of filter elements.

[0017] As an alternative to the above-mentioned drying system, the filtration accuracy of the multiple filter elements gradually decreases along the gas flow direction.

[0018] As an optional solution to the above-mentioned drying system, the filter element includes a filter bag and a bag cage, with the bag cage fixedly installed inside the housing, and the filter bag fitted over the outside of the bag cage and supported by the bag cage.

[0019] The beneficial effects of this utility model are:

[0020] This invention provides a particle recovery device and a drying system. In this particle recovery device, the particles left after filtration by the dust removal component enter the box through the feeding port. When the powder accumulates to a certain amount in the box, the operator can inspect the particles in the box through the inspection port. If the particles are qualified, they are transported to the subsequent recycling stage in the form of dried particles through the first transport component; if the particles are unqualified, water and acid are added through the liquid injection port to form a salt solution, which is then transported to the reaction vessel for re-reaction through the second transport component.

[0021] This particle recycling device can automatically collect particles and transfer them to the appropriate process based on whether the particles are qualified or not. This reduces the workload of operators, is highly efficient, and lowers costs. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the drying system provided by this utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the dust removal component provided by this utility model;

[0024] Figure 3 This is a schematic diagram of the particle recovery device provided by this utility model.

[0025] In the picture:

[0026] 1. Particle recovery device; 11. Housing; 111. Feed inlet; 112. Liquid injection port; 113. Inspection port; 114. Discharge port; 115. Inspection door; 12. First transport assembly; 121. First pipeline; 122. Fan; 13. Second transport assembly; 131. Second pipeline; 132. First pump body; 133. Switch valve; 14. Backflushing assembly; 141. Second pump body; 142. Backflushing pipe; 15. Three-way switching valve; 16. Stirring assembly; 161. Drive component; 162. Stirring paddle; 17. Level gauge;

[0027] 2. Dust removal components; 21. Housing; 211. Air inlet; 212. Air outlet; 213. Material discharge port; 22. Filter element; 221. Bag cage; 222. Filter bag. Detailed Implementation

[0028] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0029] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0030] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and connections within two components or interactions between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] Unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of a second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of a second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0032] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0033] This embodiment provides a drying system including a rotary kiln. The rotary kiln is used to calcine the precursor of the positive electrode material to dry the precursor and obtain precursor particles with parameters meeting the requirements. To reduce the humidity in the rotary kiln, a negative pressure mechanism is used to extract the humid gas inside the rotary kiln. At the same time, the precursor particles floating in the gas inside the rotary kiln are also extracted.

[0034] like Figure 1 and Figure 2As shown, the drying system also includes a dust removal component 2, which includes a housing 21. The housing 21 includes an air inlet 211 and an air outlet 212, and multiple filter elements 22 are disposed between the air inlet 211 and the air outlet 212. A negative pressure mechanism is connected to the air inlet 211, thereby drawing out the gas in the rotary kiln and forcing the gas through the dust removal component 2. The gas passes through the filter elements 22 and is discharged from the air outlet 212. The particles contained in the gas adhere to the surface of the filter elements 22 and are filtered out, thus preventing environmental pollution.

[0035] In this embodiment, the filtration precision of the multiple filter elements 22 gradually decreases along the gas flow direction. Here, filtration precision refers to the particle size that is greater than or equal to that precision and will be retained by the filter element 22. In other words, the multiple filter elements 22 gradually filter according to the particle size. By sequentially setting the filtration precision of each filter element 22, larger particles can be retained within the dust collection assembly 2, resulting in a final exhaust gas with very small particles that can be directly discharged or further recycled.

[0036] like Figure 2 As shown, the filter element 22 includes a filter bag 222 and a bag cage 221. The bag cage 221 is fixedly disposed inside the housing 21, and the filter bag 222 is sleeved on the outside of the bag cage 221 and supported by the bag cage 221. The bag cage 221 can support the filter bag 222, allowing the filter bag 222 to vibrate to a certain extent under the impact of gas, which helps particles on the surface of the filter bag 222 to detach from the filter bag 222 and prevents the filter pores of the filter bag 222 from being blocked, thus affecting the gas permeability.

[0037] In this embodiment, a vibrating element is provided on the bag cage 221, which can periodically tap the filter bag 222 to further promote the detachment of particles from the filter bag 222.

[0038] In this embodiment, the housing 21 is also provided with a discharge port 213, which is located below the multiple filter elements 22. Particles detached from the filter bags 222 can be discharged from the dust collection assembly 2 through the discharge port 213. Operators use ton bags to collect the particles remaining in the dust collection assembly 2 and transport them to a designated location for recycling, thereby improving the utilization rate and reducing costs. However, using ton bags to collect powder is inefficient and requires a high level of labor intensity for operators.

[0039] like Figure 1 and Figure 3As shown, the drying system also includes a particle recovery device 1, which further includes a housing 11, a first transport assembly 12, and a second transport assembly 13. The housing 11 has a feeding port 111, a liquid injection port 112, and an inspection port 113. The feeding port 111 is used to receive the particles to be recovered. The liquid injection port 112 is configured to inject liquid into the housing 11. The inspection port 113 is configured to remove the particles for inspection. The first transport assembly 12 is connected to the housing 11 and includes a first pipe 121 and a fan 122 disposed on the first pipe 121. The second transport assembly 13 is connected to the housing 11 and includes a second pipe 131 and a first pump body 132 disposed on the second pipe 131.

[0040] In this particle recovery device 1, the particles left after filtration by the dust removal component 2 enter the housing 11 through the feeding port 111. When the powder accumulates to a certain amount in the housing 11, the operator can check the particles in the housing 11 through the inspection port 113. If the particles are qualified, they are transported to the subsequent recycling in the form of dry particles through the first transport component 12. If the particles are unqualified, water and acid are added through the liquid injection port 112 to form a salt solution, and then transported to the reaction vessel for re-reaction through the second transport component 13.

[0041] The particle recovery device 1 can automatically collect particles and transfer them to appropriate processes based on their quality, reducing the workload of operators and achieving high efficiency and cost reduction. Furthermore, the first pipeline 121 transports gas, and the second pipeline 131 transports liquid. In this embodiment, the liquid injected through the injection port 112 can be sulfuric acid to dissolve the particles in the tank 11 into sulfates, which are then reintroduced into the reactor. In other embodiments, the liquid injected through the injection port 112 can also be hydrochloric acid or nitric acid, or other acid solutions, depending on the type of salt solution to be generated. The feeding port 111 of the tank 11 can be one or multiple, mainly determined by the number of discharge ports 213 of the dust removal component 2.

[0042] Among them, qualified particles refer to particles with appropriate size, consistent morphology, uniform pore distribution, and qualified specific surface area. If any parameter fails to meet the requirements, the particles are unqualified, cannot be recycled, and can only be put back into the reactor.

[0043] like Figure 1 and Figure 3As shown, the inspection port 113 is located on the top surface of the housing 11, and the housing 11 is provided with an inspection door 115 to open or close the inspection port 113. By placing the inspection port 113 on the top surface of the housing 11, the amount of particles overflowing from the inspection port 113 can be reduced when sampling or inspecting particles, and particles can also be prevented from blocking the inspection door 115, making operation easier. The inspection door 115 can close the inspection port 113, so that when the particle recovery device 1 collects particles, it prevents floating particles inside the housing 11 from overflowing.

[0044] It is worth noting that when the particles in the tank 11 are turned into a salt solution using acid and then transported to the reactor for re-reaction using the second transport component 13, salt solution may remain in the second pipe 131. After a long period of time, the dried solution may clog the second pipe 131.

[0045] In this embodiment, the particle recovery device 1 further includes a backflushing assembly 14, which includes a second pump body 141 and a backflushing pipe 142. One end of the backflushing pipe 142 is connected to the second pump body 141, and the other end of the backflushing pipe 142 is connected to a second pipe 131. The second pump body 141 can drive liquid into the second pipe 131. Preferably, the liquid is water, which is used to flush away the residual salt solution in the second pipe 131, thus ensuring the cleanliness of the second pipe 131.

[0046] Preferably, the second transport component 13 further includes a switch valve 133, which is disposed in the second pipeline 131. The connection between the backflushing pipe 142 and the second pipeline 131 is located between the switch valve 133 and the housing 11. When it is necessary to transport the salt solution using the second pipeline 131, the switch valve 133 is opened, and the salt solution flows through the second pipeline 131. When it is necessary to backflush the second pipeline 131, the switch valve 133 is closed, and water enters the housing 11 through the second pipeline 131, which can also rinse the inner wall of the housing 11. Then, the switch valve 133 is opened again to discharge the rinsed liquid.

[0047] like Figure 1 As shown, the pellet recovery device 1 also includes a three-way switching valve 15. The housing 11 has a discharge port 114. The three-way switching valve 15 is located at the discharge port 114. The first pipe 121 and the second pipe 131 are both connected to the three-way switching valve 15 so that the housing 11 can be connected to the first pipe 121 and one of the second pipe 131.

[0048] Using a three-way switching valve 15, the system can automatically select whether to connect to the first pipe 121 or the second pipe 131 based on the state of the particles inside the housing 11. If the particles in the housing 11 are of acceptable quality, no acid solution needs to be injected. In this case, the three-way switching valve 15 switches to connect the housing 11 to the first pipe 121, and the particles are driven by the fan 122 into the first pipe 121 and transported along it. If the particles in the housing 11 are unacceptable quality, an acid solution needs to be injected to form a salt solution. In this case, the three-way switching valve 15 switches to connect the housing 11 to the second pipe 131, and the salt solution is driven by the first pump 132 into the second pipe 131 and transported along it.

[0049] like Figure 1 As shown, the particle recovery device 1 also includes a stirring assembly 16, which includes a drive component 161 and a stirring paddle 162. The stirring paddle 162 is located inside the housing 11, and the drive component 161 is disposed in the housing 11 and connected to the stirring paddle 162 to drive the stirring paddle 162 to rotate. Since the particle recovery device 1 involves injecting an acid solution into the housing 11 to react with the particles to form a salt solution, the drive component 161 can drive the stirring paddle 162 to rotate, thereby stirring the liquid inside the housing 11. This can improve both the reaction rate and the degree of reaction between the acid solution and the particles, improve efficiency, and ensure good results.

[0050] like Figure 1 and Figure 3 As shown, the particle recovery device 1 also includes a level gauge 17, which is detachably connected to the tank 11. The level gauge 17 is configured to detect the liquid level height inside the tank 11. The level gauge 17 can detect the liquid level height inside the tank 11 in real time, ensuring that the liquid level of the acid solution inside the tank 11 is maintained within a suitable range, preventing liquid overflow and preventing uneven stirring caused by excessively low liquid levels.

[0051] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A pellet recovery device, characterized in that, include: The housing (11) has a feeding port (111), a liquid injection port (112) and an inspection port (113). The feeding port (111) is used to receive the recycled particles. The liquid injection port (112) is configured to inject liquid into the housing (11). The inspection port (113) is configured to remove the particles for inspection. A first transport component (12) is connected to the housing (11). The first transport component (12) includes a first pipe (121) and a fan (122) disposed on the first pipe (121). The second transport component (13) is connected to the housing (11). The second transport component (13) includes a second pipe (131) and a first pump body (132) disposed on the second pipe (131).

2. The particle recovery device according to claim 1, characterized in that, The inspection port (113) is located on the top surface of the housing (11), and the housing (11) is provided with an inspection door (115) to open or close the inspection port (113).

3. The particle recovery device according to claim 1, characterized in that, The particle recovery device further includes a backflushing assembly (14), which includes a second pump body (141) and a backflushing pipe (142). One end of the backflushing pipe (142) is connected to the second pump body (141), and the other end of the backflushing pipe (142) is connected to the second pipeline (131). The second pump body (141) can drive liquid into the second pipeline (131).

4. The particle recovery device according to claim 3, characterized in that, The second transport component (13) further includes a switch valve (133), which is disposed in the second pipeline (131), and the connection position of the backflush pipe (142) and the second pipeline (131) is located between the switch valve (133) and the housing (11).

5. The particle recovery device according to claim 1, characterized in that, The particle recovery device also includes a three-way switching valve (15). The housing (11) has a discharge port (114). The three-way switching valve (15) is located at the discharge port (114). The first pipe (121) and the second pipe (131) are both connected to the three-way switching valve (15) so that the housing (11) can be connected to the first pipe (121) and one of the second pipes (131).

6. The particle recovery device according to claim 1, characterized in that, The particle recovery device further includes a stirring assembly (16), which includes a driving component (161) and a stirring paddle (162). The stirring paddle (162) is located inside the housing (11). The driving component (161) is disposed in the housing (11) and connected to the stirring paddle (162) to drive the stirring paddle (162) to rotate.

7. The particle recovery device according to claim 1, characterized in that, The particle recovery device also includes a level gauge (17) which is detachably connected to the housing (11) and is configured to detect the liquid level height inside the housing (11).

8. A drying system, characterized in that, The particle recovery device according to any one of claims 1 to 7 further includes a dust removal component (2), the dust removal component (2) includes a housing (21), the housing (21) has an air inlet (211), an air outlet (212) and a material discharge port (213), a plurality of filter elements (22) are arranged between the air inlet (211) and the air outlet (212), and the material discharge port (213) is located below the plurality of filter elements (22).

9. The drying system according to claim 8, characterized in that, Along the gas flow direction, the filtration accuracy of the plurality of filter elements (22) gradually decreases.

10. The drying system according to claim 8, characterized in that, The filter element (22) includes a filter bag (222) and a bag cage (221). The bag cage (221) is fixedly installed inside the housing (21). The filter bag (222) is sleeved on the outside of the bag cage (221) and supported by the bag cage (221).

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