Circulating winnowing system applied to recycling of lithium batteries

Abstract

The utility model discloses a circulating winnowing system applied to recycling of lithium batteries, which comprises a rack, and a winnowing box body, a circulating fan and a cyclone collector are arranged on the rack; a feeding port and an air outlet are formed in the top of the winnowing box body, an air inlet and a discharging port are formed in the bottom of the winnowing box body, air closing devices are arranged at the positions, corresponding to the feeding port and the discharging port, of the winnowing box body respectively, and a blanking channel is arranged in the winnowing box body and communicated with the feeding port, the air outlet, the air inlet and the discharging port. The winnowing box, the circulating fan and the cyclone collector are connected through a pipeline to form an inner circulating air duct, and a dust discharging device is arranged at the bottom of the cyclone collector. Winnowing is conducted through the difference between the suspension speeds of light materials and heavy materials, and the equipment is suitable for shell sorting and diaphragm paper sorting in the waste lithium battery recycling process; and diaphragm paper and an adhesive tape can be further sorted from the ground material.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of winnowing, specifically to a circulating winnowing system applied to lithium battery recycling. BACKGROUND

[0002] With the popularity of new energy vehicles and portable electronic devices, the demand for lithium batteries has increased dramatically, which has also brought severe challenges in the disposal and recycling of waste lithium batteries. Waste lithium batteries contain a large amount of valuable metal elements and recyclable materials, such as cobalt, nickel, lithium, and non-metallic materials such as separator paper and adhesive tape. However, due to the complexity of lithium battery structure and the diversity of materials, traditional recycling methods often have low efficiency, high energy consumption, and environmental pollution.

[0003] In the process of lithium battery recycling, winnowing technology is attracting attention due to its high efficiency and environmental protection. Winnowing technology separates materials in the airflow based on their differences in suspension speed, which is suitable for sorting different materials in waste lithium batteries. However, traditional winnowing equipment often has low sorting accuracy, high energy consumption, and complex equipment, which cannot meet the needs of the lithium battery recycling industry for high efficiency, precision, and environmental protection.

[0004] Therefore, it is particularly important to develop a new type of circulating winnowing system suitable for lithium battery recycling. This system needs to efficiently and accurately separate the materials in waste lithium batteries such as shells, separator paper, and adhesive tape, while achieving the recycling of airflow, reducing energy consumption and emissions, and improving the efficiency and purity of resource recycling. SUMMARY

[0005] The utility model aims at providing a circulating winnowing system applied to lithium battery recycling to solve the problems raised in the background technology. This device uses the difference in suspension speed between light and heavy materials for winnowing, which is suitable for shell sorting and separator paper sorting in the process of waste lithium battery recycling, and can further separate separator paper and adhesive tape from ground materials.

[0006] In order to achieve the above object, the utility model provides the following technical scheme: A kind of cyclic winnowing system applied to lithium battery recycling, including rack, the rack is provided with winnowing box, circulating fan, cyclone material collector;The top of the winnowing box is provided with feed inlet, air outlet, the bottom of the winnowing box is provided with air inlet, discharge port, the winnowing box is respectively provided with air stopper corresponding feed inlet, discharge port position, air inlet and discharge port are communicated in the winnowing box;The winnowing box is relatively provided with left baffle, right baffle, the left baffle and right baffle form the drop channel with the winnowing box, the winnowing box is provided with first baffle between feed inlet and air outlet, and second baffle is provided between air inlet and discharge port in the winnowing box;

[0007] One end of the circulating fan is connected to the air inlet, and the other end is connected to the air outlet of the cyclone material collector;The air outlet of the winnowing box is connected to the feed inlet of the cyclone material collector;The winnowing box, circulating fan and cyclone material collector are connected by pipeline to form an internal circulation air duct, and the bottom of the cyclone material collector is provided with an ash discharging device;The pipeline is provided with a make-up air pipe for supplementing air to the internal circulation air duct, the air inlet of the make-up air pipe is provided with a filter, and control valves are further provided between the pipelines to control the opening and closing of the air inlet of the make-up air pipe.

[0008] In order to further optimize the utility model, the following technical solutions can be preferred:

[0009] Preferably, the left baffle and the right baffle are both multi-bend plates, and the drop channel is wave-shaped.

[0010] Preferably, the winnowing box is provided with a maintenance mechanism corresponding to the drop channel, the maintenance mechanism comprises a maintenance door assembly provided on the outer wall of the winnowing box, and the winnowing box is provided with a transparent window on the other side of the maintenance door assembly.

[0011] Preferably, the maintenance door assembly comprises a door frame and a maintenance door provided on the winnowing box, one end of the maintenance door is hingedly connected to the door frame, the other end of the maintenance door is provided with a door body pressing device, the winnowing box is provided with a maintenance hole corresponding to the position of the door frame, and a closed sealing protruding strip is provided on the outer wall of the winnowing box corresponding to the position of the maintenance hole.

[0012] Preferably, the door body pressing device comprises a pressing arm hingedly connected to the winnowing box, one end of the pressing arm is provided with a pressing handle, and the other end of the pressing arm is provided with a pressing disc corresponding to the position of the maintenance door.

[0013] Preferably, the transparent window is staggered in the drop direction.

[0014] This circulating air separation system has the following beneficial effects in the field of lithium battery recycling:

[0015] 1. Improve sorting efficiency: By utilizing the difference in suspension speed between light and heavy materials for air separation, different components such as shells and diaphragm paper in waste lithium batteries can be effectively separated, improving the accuracy and efficiency of sorting.

[0016] 2. Recycling: The system is designed to be circular, meaning that materials in the air separation process can be repeatedly screened until the desired purity is achieved, reducing material waste.

[0017] 3. Reduce environmental pollution: Through the design of the cyclone collector and ash unloading device, dust and impurities generated during the screening process can be effectively collected and treated, reducing environmental pollution.

[0018] 4. Easy to operate: The design of the air shutter allows the inlet and outlet to be closed as needed, making it easy for operators to control material flow and simplifying the operation process.

[0019] 5. High flexibility: The design of the baffle and baffle can be adjusted according to the characteristics of the material to adapt to the sorting needs of different types of lithium battery materials.

[0020] 6. Reduce energy consumption: The design of the internal circulation air duct reduces air waste, and the air supplement pipe and control valve can accurately control the air volume, thereby reducing energy consumption.

[0021] 7. Improve safety: The use of filters and control valves can prevent dust and impurities from entering the fan and pipeline system, reducing the risk of equipment failure and safety accidents.

[0022] 8. Low maintenance cost: Due to the reasonable design and simple structure of the system, maintenance and cleaning work is relatively easy, reducing long-term operation maintenance costs.

[0023] 9. Strong adaptability: This system not only applies to the sorting of shells and diaphragm paper of waste lithium batteries, but also can further separate ground materials, improving the application range of the equipment.

[0024] 10. Promote resource recycling: Through effective sorting, the recycling rate of waste lithium battery materials can be improved, promoting resource recycling and reducing the demand for new resources.

[0025] In summary, this circulating air separation system has significant beneficial effects in improving sorting efficiency, reducing energy consumption, reducing environmental pollution, improving safety, and promoting resource recycling. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 A schematic view of the three-dimensional structure of a circulating air separation system Figure 1

[0027] Figure 2 A schematic view of the three-dimensional structure of a circulating air separation system Figure 2

[0028] Figure 3 A schematic view of the three-dimensional structure of an air separator Figure 1

[0029] Figure 4 A schematic view of the three-dimensional structure of an air separator Figure 2

[0030] Figure 5 A schematic view of the three-dimensional structure of a fan box

[0031] Figure 6 A schematic view of the internal structure of an air separator

[0032] Figure 7 A schematic view of the structure of an access door assembly

[0033] Figure 8 An enlarged schematic view of the structure at A.

[0034] In the figure: 1, air separator; 2, circulating fan; 3, circulating fan; 4, cyclone collector; 5, pipe; 6, air supplement pipe; 7, control valve; 8, filter; 9, ash discharging device

[0035] 101, air separation box; 102, feed inlet; 103, air outlet; 104, air inlet; 105, discharge outlet; 106, air blocking device; 107, access door assembly; 108, transparent window; 109, air uniformizing plate; 110, air uniformizing through hole; 111, left material blocking plate; 112, right material blocking plate; 113, material falling channel; 114, first blocking plate; 115, pad plate; 116, door frame; 117, access door; 118, access hole; 119, closed sealing protruding strip; 120, pressing arm; 121, pressing handle; 122, pressing disc. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application.

[0037] Please refer to Figures 1-8 ​​​​The utility model provides a kind of embodiment applied to lithium battery recycling's circulating air separation system, including rack 2, rack is equipped with air separation machine 1, circulating fan 3, cyclone collector 4;Wherein air separation machine 1 includes air separation box body 101, air separation box body top is equipped with feed inlet 102, air outlet 103, air separation box body bottom is equipped with air inlet 104, discharge port 105, air separation box body is equipped with closed air device 106 respectively in position corresponding feed inlet, discharge port, air separation box body is equipped with blanking passageway in, blanking passageway is linked with feed inlet, air outlet, air inlet, discharge port, air separation box body is equipped with maintenance mechanism in position corresponding blanking passageway, maintenance mechanism includes maintenance door assembly 107 being installed in the outer wall of air separation box body, air separation box body is equipped with transparent window 108 on the other side relative maintenance door assembly, above-mentioned structure design can solve the problem that original air separation machine box body is without maintenance mechanism, when internal plugging, only remove upper and lower outer connection equipment to remove internal blockage, cause manpower, time waste and seriously affect production efficiency problem.Wherein air inlet is installed in air separation box body side, air inlet is equipped with air distribution plate 109, and air distribution plate is equipped with air distribution hole 110 on uniform distribution;Circulating fan 3 one end is connected air inlet, and the other end is connected cyclone collector's air outlet end;Air separation box body's air outlet is connected cyclone collector's feed inlet;Air separation machine, circulating fan, cyclone collector 4 are connected by pipeline and form internal circulation air duct, and cyclone collector 4 bottom is equipped with ash removal device 9;Wherein pipeline 5 is equipped with air supplement pipe 6 for supplementing air to internal circulation air duct, and air inlet position of air supplement pipe is equipped with filter 8, and control valve 7 is also installed between pipeline for opening and closing control of air supplement pipe air inlet.

[0038] When the device is used, the ground material enters the air separation box body through the feed closed air device;The feed and discharge closed air device runs at a constant speed, so that the air separation box body forms a sealed space, and the mixture is collided and separated multiple times between the folding plates by internal circulation air.

[0039] In the design of the air separator system with an air separator, the air inlet is installed on one side of the air separation box body, and an air uniformizing plate is installed at the air inlet, and air uniformizing holes are uniformly arranged on the air uniformizing plate. This preferred scheme has the following beneficial effects: (1) Improve airflow uniformity: The design of the air uniformizing plate and the air uniformizing holes on it can effectively distribute the airflow entering the air separation box body uniformly, avoiding the formation of vortex or local high-speed area at the air inlet, thereby ensuring the stability and uniformity of the airflow during the air separation process. This is crucial for improving the efficiency and precision of air separation. (2) Enhance air separation effect: Uniform airflow distribution helps to achieve more accurate classification and screening of materials in the air separation box body. Different particle sizes or densities of materials can be more clearly separated under the action of uniform airflow, reducing the mixing phenomenon and improving the purity and quality of the product. (3) Reduce equipment wear: Non-uniform airflow may cause the inner wall or components of the air separation box body to be impacted and worn, while the design of the air uniformizing plate can reduce such impact and reduce the degree of equipment wear, prolonging the service life of the equipment. (4) Improve equipment stability: Stable airflow distribution helps to maintain the stability of the air separator in operation, reducing vibration and noise caused by airflow fluctuations, improving the stability and reliability of the equipment. (5) Optimize energy consumption: By optimizing the distribution and flow path of the airflow, the design of the air uniformizing plate helps to reduce energy consumption during the air separation process. Uniform airflow can more effectively utilize wind energy, reducing unnecessary energy loss and improving energy utilization efficiency.

[0040] The left material blocking plate 111 and the right material blocking plate 112 are oppositely arranged in the winnowing box 101, and the left material blocking plate and the right material blocking plate form a material falling channel 113 with the winnowing box; the first baffle 114 is arranged between the material inlet and the air outlet in the winnowing box; and the second baffle 115 is arranged between the air inlet and the material outlet in the winnowing box; wherein the left material blocking plate and the right material blocking plate are both multi-bending plates, and the material falling channel is in a wave shape; the above structure design has the following advantages: (1) improving material dispersion: the wave-shaped material falling channel design makes the material experience multiple changes in direction and speed during the falling process, thereby increasing the dispersion degree between the material particles. This dispersion helps the material to be more evenly exposed to the airflow, improving the winnowing effect. (2) Enhancing the contact between airflow and material: the wave-shaped material falling channel not only changes the movement trajectory of the material, but also makes the airflow form more vortex and turbulent areas in the channel. These areas enhance the contact area and contact time between the airflow and the material, helping to more fully utilize the power of the airflow to classify and screen the material. (3) Optimizing material classification: the first baffle and the second baffle further refine the flow path of the airflow and the material. They can guide the airflow to flow in a specific direction while controlling the falling speed and position of the material. This optimization allows different particle sizes or densities of the material to be more accurately separated into different outlets, improving the classification accuracy of the product. (4) Reducing the risk of blockage: the wave-shaped material falling channel design helps to reduce the accumulation and blockage of the material in the channel. Since the material constantly changes direction and speed in the channel, its flowability is enhanced, and it is not easy to form dead zones or accumulation points. This reduces the risk of equipment downtime due to blockage, improving the running stability and reliability of the equipment. (5) Improving the adaptability of the equipment: this preferred solution enables the winnower to more flexibly adapt to different types and properties of materials. By adjusting the parameters of the baffles and the material falling channel, precise classification and screening of different particle sizes, densities and shapes of materials can be achieved, improving the adaptability and flexibility of the equipment.

[0041] The access door assembly includes a door frame 116 mounted on the winnowing box, an access door 117 hingedly mounted in the door frame at one end, and a door body pressing device mounted at the other end of the access door. The winnowing box has an access hole 118 corresponding to the position of the door frame, and a closed sealing protruding strip 119 is mounted on the outer wall of the winnowing box corresponding to the position of the access hole. The closed sealing protruding strip is sealed with the inner wall of the access door. The door body pressing device includes a pressing arm 120 hingedly mounted on the winnowing box, a pressing handle 121 mounted at one end of the pressing arm, and a pressing disc 122 mounted at the other end of the pressing arm corresponding to the position of the access door. The door body pressing device is installed in multiple rows. The above structure has the following advantages: (1) The design of the access door assembly allows maintenance personnel to easily open and close the access door without the need for complex tools. The combination of hinged installation and the door body pressing device ensures the tightness and stability of the access door when closed, while facilitating quick opening for internal inspection and cleaning. (2) This design greatly improves the convenience and efficiency of maintenance; the sealing design of the closed sealing protruding strip with the inner wall of the access door effectively prevents the leakage of airflow and dust inside the winnowing box into the external environment. This not only maintains the stability and efficiency of the winnowing process, but also reduces environmental pollution and the health risks of maintenance personnel. (3) Multiple door body pressing devices are installed in multiple rows, ensuring that the access door can be evenly stressed when closed, enhancing the sealing effect while also improving the safety of the access door. Even in high wind speed or vibration environments, the access door remains stable and does not fall off, ensuring the safety of the equipment and personnel.

[0042] The transparent windows 108 are installed in multiple rows along the direction of the falling material. This layout allows maintenance personnel to more comprehensively observe the internal conditions of the winnowing box, especially the running state of the falling material channel and key components. This optimized monitoring effect helps to discover potential problems in a timely manner and take measures to solve them, improving the reliability and maintenance efficiency of the equipment. By adjusting the number and position of the transparent windows, as well as the design parameters of the access door assembly and the door body pressing device, this preferred solution enables the winnowing machine to be more flexible in adapting to different working environments and material characteristics. This adaptability enhances the versatility and market competitiveness of the equipment.

[0043] In summary, this solution: (1) improves the internal folding plate structure to ensure smooth material feeding and prevent blockage; (2) sets up a sealable access door that can be easily opened for internal maintenance; (3) uses bolts to fix the external sealing plate, which can be easily and quickly disassembled; (4) sets up an air distribution structure to evenly distribute the circulating air entering the box, so that the material is evenly blown away and the separation is complete.

[0044] It is apparent for a person skilled in the art that the present application is not restricted to the details of the above exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary only, and not limiting, the scope of the present application being defined by the appended claims rather than the above description, and all changes coming within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims concerned.

Claims

1. A circulating air separation system applied to the recycling of lithium batteries, comprising a rack, characterized in that: The rack is provided with a winnowing box, a circulating fan and a cyclone material collector; the winnowing box is provided at the top with an inlet and an air outlet, and at the bottom with an air inlet and an outlet; the winnowing box is provided at positions corresponding to the inlet and the outlet with air shutters respectively; the winnowing box is provided with a material falling channel; the material falling channel is in communication with the inlet, the air outlet, the air inlet and the outlet; the winnowing box is provided oppositely with a left material blocking plate and a right material blocking plate; the left material blocking plate and the right material blocking plate form the material falling channel with the winnowing box; the winnowing box is provided at a position between the inlet and the air outlet with a first baffle; the winnowing box is provided at a position between the air inlet and the outlet with a second baffle. One end of the circulating fan is connected to the air inlet, and the other end is connected to the air outlet of the cyclone material collector; the air outlet of the winnowing box is connected to the inlet of the cyclone material collector; the winnowing box, the circulating fan and the cyclone material collector are connected through pipes to form an internal circulating air duct; the bottom of the cyclone material collector is provided with an ash discharging device; the pipes are provided with a make-up air pipe for making up air for the internal circulating air duct; the air inlet of the make-up air pipe is provided with a filter; the pipes are further provided with a control valve for controlling the opening and closing of the make-up air port of the make-up air pipe.

2. The circulating air separation system for recycling lithium batteries according to claim 1, characterized in that: The left material blocking plate and the right material blocking plate are both multi-bending plates, and the material falling channel is wave-shaped.

3. The circulating air separation system for recycling lithium batteries according to claim 1, characterized in that: The winnowing box is provided at a position corresponding to the material falling channel with an inspection mechanism; the inspection mechanism comprises an inspection door assembly provided on the outer wall of the winnowing box; the winnowing box is provided on the other side of the inspection door assembly with a transparent window.

4. The circulating air separation system for recycling lithium batteries according to claim 3, characterized in that: The inspection door assembly comprises a door frame and an inspection door provided on the winnowing box; one end of the inspection door is hingedly provided in the door frame; the other end of the inspection door is provided with a door body pressing device; the winnowing box is provided at a position corresponding to the door frame with an inspection hole; the outer wall of the winnowing box is provided at a position corresponding to the inspection hole with a closed sealing protruding strip; the closed sealing protruding strip is sealed with the inner wall of the inspection door.

5. The circulating air separation system for recycling lithium batteries according to claim 4, characterized in that: The door body pressing device comprises a pressing arm hingedly provided on the winnowing box; one end of the pressing arm is provided with a pressing handle; the other end of the pressing arm is provided at a position corresponding to the inspection door with a pressing disc; the door body pressing device is provided with multiple pressing arms side by side.

6. The circulating air separation system for recycling lithium batteries according to claim 5, characterized in that: The transparent window is provided with multiple transparent windows staggered along the material falling direction.

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