A secondary recycling device for lithium battery material filtrate

Abstract

The utility model discloses a secondary recycling device for lithium battery material filtrate, which belongs to the technical field of lithium ion battery manufacturing, and comprises a preprocessor, a liquid collector and a high-pressure waste liquid processor, wherein the high-pressure waste liquid processor comprises a separator body, the upper part of the separator body is provided with a volute-type feeding component, the volute-type feeding component is provided with a feeding port in the shape of a trumpet, the end of the feeding port is mirror-connected with an air guide duct, the top of the separator body is plugged with an overflow pipe, the bottom of the separator body is provided with a dust outlet, the separator body is connected with a filter cover through a spiral guide strip, the filter cover is provided with filter holes along the direction of wind flow movement, and the filter cover is provided with buffer sheets corresponding to the filter holes; the utility model effectively solves the problem that the fine particles in the existing cyclone separator for secondary recycling of lithium battery material filtrate have poor sedimentation effect during use, and are easily overflowed into subsequent equipment due to rising vortex.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium ion battery manufacturing, in particular to a secondary recycling device for lithium battery material filtrate. Background Art

[0002] In the production process of lithium battery materials, equipment such as filter presses and centrifuges are widely used for water-solid separation of slurry. However, due to the limitation of filtration accuracy, tiny particles are often lost, which has an adverse effect on battery performance. The loss of tiny particles not only affects the electrochemical performance of the battery, but may also lead to thermal management problems, increased side reactions and decreased cycle performance. Cyclone separators play an important role in the recovery and treatment of lithium battery material filtrate. During the recovery and treatment of lithium battery material filtrate by cyclone separators, fine particles are easily affected by the airflow in the negative pressure zone and overflow into subsequent equipment, which reduces the separation effect of the cyclone separator and increases the frequency of cleaning of subsequent equipment.

[0003] Chinese patent CN216756803U discloses a cyclone separator, comprising a shell, the upper part of which is a spiral part; a mixing feed port is arranged on the top of the shell for feeding; an exhaust pipe is arranged on the top of the shell, one end of the exhaust pipe is connected to the inner cavity of the shell, and the other end is used to connect to a negative pressure device; an air supply pipe is arranged in the exhaust pipe, one end of the air supply pipe is connected to the inner cavity of the shell, and the other end is connected to the atmosphere; a diffuser is arranged at the bottom of the air supply pipe, and the diffuser is wrapped around the outer circumference of the air supply pipe and expands outward. Chinese patent CN219150438U discloses a cyclone separator, comprising: an outer shell, a storage space is formed inside, the surrounding wall of the storage space is a smooth curved surface, an air inlet channel and an air outlet channel connected to the storage space are formed on the outer shell, the air inlet channel is used to introduce the gas that has not been separated into the storage space, the air outlet channel is used to guide the gas after the impurities are separated from the storage space, and the bottom of the outer shell is also provided with a discharge port connected to the storage space, the discharge port is used to discharge the separated impurities; a filter assembly is arranged in the storage space, and the gas after the impurities are separated enters the air outlet channel after passing through the filter assembly; the filter assembly includes a filter element, and the filter element is provided with a plurality of filter holes for filtering the impurities remaining in the airflow. However, the existing cyclone separator for secondary recycling of lithium battery material filtrate has poor sedimentation effect of fine particles during use, and is easily affected by the rising vortex and overflows into the subsequent equipment; therefore, it is necessary for this application to provide a secondary recycling device for lithium battery material filtrate with good separation effect. Utility Model Content

[0004] The purpose of the utility model is to overcome the problem that the fine particles in the existing cyclone separator for secondary recycling of lithium battery material filtrate have poor sedimentation effect during use and are easily overflowed into subsequent equipment due to rising vortexes. The utility model provides a secondary recycling device for lithium battery material filtrate with good separation effect.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a secondary recycling device for lithium battery material filtrate, comprising a pre-processor, a liquid collector and a high-pressure waste liquid processor, the high-pressure waste liquid processor comprising a separator body, the upper part of the separator body is provided with a volute-type feeding component, the tube wall of the volute-type feeding component spirally extends downward along the axis and is connected with the interior of the separator body, the volute-type feeding component is provided with a trumpet-shaped feeding port, the end of the feeding port is mirror-connected with an air duct, the top of the separator body is inserted with an overflow pipe, the overflow pipe extends into the interior of the separator body, the bottom of the separator body is provided with a dust exhaust port, the interior of the separator body is connected with a filter cover through a spiral guide strip, the filter cover is provided with filter holes along the direction of wind flow movement, and the filter cover is provided with buffer plates corresponding to the filter holes.

[0006] Furthermore, the feed port is located at a level higher than the end of the overflow pipe in the separator body.

[0007] Furthermore, a plurality of connecting rods are provided at equal intervals on both sides of the spiral guide strip, and the spiral guide strip is connected to the inner wall of the separator body and the filter cover respectively through the connecting rods.

[0008] Furthermore, the buffer sheet is arranged on the inner wall of the filter cover corresponding to the filter hole, and is arranged at an angle of 20-35 degrees with the filter hole along the direction of wind flow movement.

[0009] Furthermore, the separator body is connected to the filter cover through the spiral guide strip to form a spiral guide cavity.

[0010] Furthermore, the height of the horizontal plane where the filter holes arranged at the upper end of the filter cover are located is lower than the height of the horizontal plane where the end of the overflow pipe in the separator body is located.

[0011] The utility model provides a secondary recycling device for lithium battery material filtrate, which has the following beneficial effects:

[0012] The utility model increases the distance between the feed end and the air guide pipe through the arrangement of the feed port and the air guide pipe, forms a slow flow cavity, so as to reduce the flow velocity of the fluid entering the separator body. Combined with the spiral guide strip that is formed after the separator body is connected to the filter cover, and the arrangement of the filter holes and the buffer sheet on the filter cover, the airflow can form a vortex in the separator body and further decelerate the airflow, thereby improving the quality of precipitation of fine particles in the spiral guide cavity, and can effectively reduce the fine particles from overflowing into subsequent equipment due to the rising vortex. The utility model is easy to operate and has strong practicality, and effectively solves the problem that the fine particles in the existing cyclone separator for secondary recycling of lithium battery material filtrate have poor sedimentation effect and are easily overflowed into subsequent equipment due to the rising vortex during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model of the secondary recycling device of lithium battery material filtrate.

[0014] Figure 2 This is a schematic diagram of the feed port structure of the lithium battery material filtrate secondary recycling device of the utility model.

[0015] Figure 3 This is a schematic diagram of the internal structure of the separator body of the lithium battery material filtrate secondary recycling device of the utility model.

[0016] In the figure, 1. separator body; 2. volute type feeding component; 3. feeding port; 4. air guide duct; 5. overflow pipe; 6. dust exhaust port; 7. filter cover; 8. spiral guide strip; 10. spiral guide chamber. DETAILED DESCRIPTION

[0017] The technical solution of the utility model is described clearly and completely below in conjunction with the specific embodiments of the utility model. The described embodiments are only a part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0018] like Figure 1-3As shown, the utility model provides a secondary recycling device for lithium battery material filtrate, including a pre-processor, a liquid collector and a high-pressure waste liquid processor, that is, the pre-processor adopts valve control technology to quickly intercept and guide the initial wastewater generated by the filter press into the liquid collector to achieve preliminary centralized collection, the liquid collector is equipped with a liquid level sensor, when the preset liquid level is reached, the polytetrafluoroethylene pump automatically starts to transport the waste liquid to the raw material separation filter, to achieve automatic control of the liquid level; the pre-processor of the present application includes a raw material separation filter, the raw material separation filter has a built-in 0.2μm PE coated filter material, which can effectively intercept filter residues, and is also equipped with a pure water cleaning and air purge system to prevent filter material clogging and maintain filtration efficiency. The present application uses a polytetrafluoroethylene pump to return the purified concentrated liquid to the front-end production process to achieve closed-loop circulation of materials.

[0019] The high-pressure waste liquid treatment device described in the present application includes a separator body 1, which utilizes the tangential introduction of airflow to generate rotational motion, and combines centrifugal force and gravity to achieve effective separation of gas-solid or liquid-solid. The separator body 1 is composed of a cylindrical portion and a conical cylindrical portion in one piece; a volute-type feeding member 2 is provided at the upper part of the separator body 1, and the tube wall of the volute-type feeding member 2 extends downward along the axis in a spiral and is connected to the interior of the separator body 1, and the volute-type feeding member 2 is provided with a horn-shaped feed port 3, and the end of the feed port 3 is mirror-connected with an air duct 4. By setting the feed port 3 and the air duct 4, the distance between the feed ends is increased, so that a slow flow cavity is formed at the connection, so as to reduce the flow rate of the fluid entering the separator body 1, thereby reducing the collision impact of fine particles in the airflow on the inner wall of the separator body 1.

[0020] An overflow pipe 5 is inserted at the top of the separator body 1, and the overflow pipe 5 extends into the interior of the separator body 1. The horizontal height of the feed port 3 described in the present application is set higher than the horizontal height of the end of the overflow pipe 5 in the separator body 1, so as to prevent fine particles in the airflow in the separator body 1 entering from the feed port 3 from entering the overflow pipe 5 under the action of the airflow, and then overflowing into the subsequent equipment under the action of the continuous rising vortex, thereby improving its practical performance.

[0021] A dust outlet 6 is provided at the bottom of the separator body 1, and a filter cover 7 is connected to the inside of the separator body 1 through a spiral guide strip 8. A plurality of connecting rods are provided at equal intervals on both sides of the spiral guide strip 8. The spiral guide strip 8 is connected to the inner wall of the separator body 1 and the filter cover 7 through connecting rods (not shown in the figure), respectively. The connecting rods are used to connect the two so that a gap is formed between the two so that the settled fine particles can settle to the lower layer and then be discharged. The separator body 1 described in the present application is connected to the filter cover 7 through the spiral guide strip 8 to form a spiral guide cavity 10, which ensures that the airflow entering the separator body 1 does not dissipate during the rotation process, so that the airflow is A vortex can be formed in the separator body 1 while further slowing down the airflow, thereby improving the quality of precipitation of fine particles in the spiral guide chamber 10. On the other hand, it increases the residence time of the airflow in the equipment, which is convenient for the sedimentation of fine particles. The present application utilizes the tangential introduction of the airflow to generate rotational motion, combines centrifugal force and gravity, and realizes effective separation of gas-solid or liquid-solid, so that solid particles with greater inertial centrifugal force are thrown to the outer wall, coarse and heavy particles are closer to the outside, and fine and light particles are closer to the outer wall of the filter cover 7 and then rebound in the spiral guide chamber 10, thereby further preventing fine particles from overflowing into subsequent equipment under the action of the rising vortex.

[0022] The filter cover 7 is provided with filter holes along the direction of wind flow, and the filter cover 7 is provided with buffer sheets (not shown in the figure) corresponding to the filter holes. The buffer sheets are provided on the inner wall of the filter cover 7 corresponding to the filter holes, and are provided at 20-35 degrees with the filter holes along the direction of wind flow. The height of the horizontal plane where the filter holes provided at the upper end of the filter cover 7 are located is lower than the height of the horizontal plane where the end of the overflow pipe 5 in the separator body 1 is located, so as to improve the filtering effect of the filter cover 7 of the present application, so that the airflow can form a vortex in the separator body 1, and at the same time improve the quality of the precipitation of fine particles in the spiral guide cavity 10, so that the airflow flows out from the filter holes, and the fine particles are rebounded back into the spiral guide cavity 10 by the outer wall of the filter cover 7, and the very small part of the fine particles flowing out with the airflow are intercepted and settled again by the provision of the buffer sheets, thereby reducing the overflow of fine particles due to the rising vortex.

[0023] According to the utility model, the gas containing solid particles or liquid droplets passes through the pre-processor and the liquid collector and enters the feed port 3 through the air guide pipe 4, and enters the separator body 1 from the feed port 3 in a tangential direction at a certain speed, and relies on the rotational motion generated by the tangential introduction of the airflow, so as to utilize centrifugal force and gravity to achieve gas-solid or liquid-solid separation; the gas containing solid particles or liquid droplets generates a rotating flow under the guidance of the spiral guide strip 8 in the spiral guide cavity 10, and the gas and particles flow downward in a spiral shape in the cylinder body, and the particles with larger density are thrown to the wall of the device under the action of centrifugal force, and the fine particles are rebounded back into the spiral guide cavity 10 by the outer wall of the filter cover 7, and fall along the cylinder wall and are discharged from the dust outlet 6; at the same time, the gas shrinks in the cylinder body and flows toward the center, forming an upward secondary vortex, and is finally discharged through the riser pipe to complete the gas-solid or liquid-solid separation; thereby effectively solving the problem that the fine particles in the existing cyclone separator for secondary recycling of lithium battery material filtrate have poor sedimentation effect and are easily overflowed into subsequent equipment due to the rising vortex during use.

[0024] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

[0025] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A secondary recycling device for lithium battery material filtrate, comprising a pre-processor, a liquid collector and a high-pressure waste liquid processor, characterized in that: The high-pressure waste liquid treatment device comprises a separator body (1), the upper part of which is provided with a volute-type feeding component (2), the tube wall of which spirally extends downward along an axis and is connected to the interior of the separator body (1), the volute-type feeding component (2) is provided with a feeding port (3) in the shape of a trumpet, the end of which is mirror-connected to an air guide pipe (4), the top of which is inserted with an overflow pipe (5), which extends into the interior of the separator body (1), the bottom of which is provided with a dust discharge port (6), the interior of the separator body (1) is connected to a filter cover (7) via a spiral guide strip (8), the filter cover (7) is provided with filter holes along the direction of airflow movement, and the filter cover (7) is provided with a buffer sheet corresponding to the filter holes.

2. The device for secondary recycling of lithium battery material filtrate according to claim 1, characterized in that: The level at which the feed port (3) is located is higher than the level at which the end of the overflow pipe (5) in the separator body (1) is located.

3. The device for secondary recycling of lithium battery material filtrate according to claim 1, characterized in that: A plurality of connecting rods are provided at equal intervals on both sides of the spiral guide strip (8), and the spiral guide strip (8) is connected to the inner wall of the separator body (1) and the filter cover (7) respectively through the connecting rods.

4. The device for secondary recycling of lithium battery material filtrate according to claim 1, characterized in that: The buffer sheet is arranged on the inner wall of the filter cover (7) corresponding to the filter hole, and is arranged at an angle of 20-35 degrees to the filter hole along the direction of airflow movement.

5. The device for secondary recycling of lithium battery material filtrate according to claim 1, characterized in that: The separator body (1) is connected to the filter cover (7) via the spiral guide strip (8) to form a spiral guide chamber (10).

6. The device for secondary recycling of lithium battery material filtrate according to claim 1, characterized in that: The height of the horizontal plane where the filter holes arranged at the upper end of the filter cover (7) are located is lower than the height of the horizontal plane where the end of the overflow pipe (5) in the separator body (1) is located.

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