Membrane material powder mixing device

Abstract

The utility model provides a diaphragm material powder mixing device which comprises a main material conveying unit, an auxiliary preparation unit and a premixing buffer hopper, and the main material conveying unit comprises a feeding assembly, a filtering assembly and a first metal detector which are connected in sequence; the additive preparation unit comprises a feeding hopper and a weightlessness scale which are connected in sequence; the first metal detector and the weightlessness scale are respectively connected with the input end of the premixing buffer hopper, and the output end of the premixing buffer hopper is sequentially connected with the second metal detector, the gas mixing unit and the packaging unit; the gas mixing unit comprises a gas source assembly and a gas flow homogenizing bin, the gas source assembly is used for conveying nitrogen to the gas flow homogenizing bin, and the output end of the gas flow homogenizing bin is sequentially connected with a stop valve, a third metal detector, a packaging rotary valve and a packaging unit. Compared with the prior art, the homogenizing and mixing device has the advantages of high automation degree, good homogenizing and mixing effect, safety and reliability, can ensure that the product performance of each batch of materials is uniform and stable, can amplify the capacity of the device, and effectively saves manpower and time cost.

Description

A diaphragm material powder mixing device Technical Field

[0001] This utility model relates to the technical field of diaphragm materials, and in particular to a diaphragm material powder mixing device. Background Technology

[0002] Currently, separator materials are one of the most challenging and technologically advanced key components in the lithium battery industry chain, and also the product with the lowest domestic production rate among the four main materials. The performance of separator materials directly affects battery capacity, cycle life, and other aspects. Among these, thinning and high performance are the main trends in the development of the separator industry. Thinning separators requires increasing molecular weight while also refining particle size and narrowing particle size distribution.

[0003] Current conventional mixing equipment on the market, such as mechanical stirring, circulating homogenization, and pneumatic homogenization, suffers from drawbacks such as uneven mixing, hot spots, agglomeration, and difficulty in cleaning residual materials. Achieving narrow particle size distribution, good uniformity, and low impurity increment in the final product while ensuring high-capacity ultrafine sieving has become another significant limiting factor for preparation equipment. Therefore, it is urgent to solve these problems. Summary of the Invention

[0004] To address the aforementioned issues, this utility model provides a diaphragm material powder mixing device, which features a high degree of automation, excellent homogenization and mixing effect, and safety and reliability. It can ensure that the product performance of each batch of materials is uniform and stable, and can realize the scale-up of the device's production capacity, effectively saving manpower and time costs.

[0005] This utility model achieves the above-mentioned objective through the following technical solution: a diaphragm material powder mixing device, comprising a main material conveying unit, an auxiliary agent preparation unit and a premixing buffer hopper, wherein the main material conveying unit comprises a feeding component, a filtering component and a first metal detector connected in sequence;

[0006] The additive preparation unit includes a feeding hopper and a loss-in-weight scale connected in sequence;

[0007] The first gold detector and the loss-in-weight scale are respectively connected to the input end of the premixed buffer hopper, and the output end of the premixed buffer hopper is sequentially connected to the second gold detector, the gas mixing unit and the packaging unit;

[0008] The gas mixing unit includes a gas source component and an airflow homogenization chamber. The gas source component is used to supply nitrogen to the airflow homogenization chamber. The output end of the airflow homogenization chamber is sequentially connected to a shut-off valve, a third metal detector, a packaging rotary valve, and the packaging unit.

[0009] Furthermore, the feeding assembly includes a mounting frame, a lifting device is installed at the top of the mounting frame, a flow-assisting beater is installed in the middle of the mounting frame, and a feeding buffer hopper is installed at the bottom of the mounting frame. The input end of the feeding buffer hopper is connected to the output end of the main flow beater. The flow-assisting beater is also connected to a filter and an induced draft fan in sequence. A feeding gate is provided on the side of the mounting frame.

[0010] Furthermore, the filtration assembly includes a feeding buffer hopper, a discharge rotary valve, and a vibrating screen connected in sequence. The input end of the feeding buffer hopper is connected to the output end of the feeding buffer hopper. The vibrating screen is provided with a first output port and a second output port. The first output port is connected to the first metal detector, and the second output port is connected to a defective product collection container.

[0011] Furthermore, homogenizing gas components are evenly distributed along the circumferential direction at the bottom of the airflow homogenization chamber, and the homogenizing gas components are correspondingly connected to airflow homogenization valve groups; a sampling valve is provided at the bottom of the airflow homogenization chamber, a high-level switch is connected to the top side wall of the airflow homogenization chamber, and a bag filter is provided at the top of the airflow homogenization chamber.

[0012] Furthermore, the gas source assembly includes an air compressor, a nitrogen generator, and a gas storage tank connected in sequence, with the output port of the gas storage tank connected to the airflow homogenization valve group.

[0013] Furthermore, the inlet of the airflow homogenization chamber is connected to a feed rotary valve, the inlet of the feed rotary valve is connected to a negative pressure receiving hopper, and a pneumatic conveying pipeline is connected between the inlet of the negative pressure receiving hopper and the output port of the second metal detector.

[0014] Furthermore, the negative pressure receiving hopper is connected to a tail gas recovery assembly, which includes a tail gas buffer tank, a recovery compressor, an outlet buffer tank, and a negative pressure control valve group connected in sequence. The negative pressure control valve group is connected to the pneumatic conveying pipeline.

[0015] Furthermore, it also includes a control unit, which includes a main control module and an exhaust gas recovery control module, a gas source control module, a feeding control module, an additive preparation control module, a screening control module, a conveying control module, a packaging control module, and an electrical control cabinet electrically connected to the main control module. The electrical control cabinet is electrically connected to a pressure divider cabinet.

[0016] Compared with existing technologies, the advantages of this invention are as follows: Nitrogen is safely transported to the powder via a gas source component, avoiding the potential risk of dust explosions and making it safer and more reliable; the nitrogen can be recovered and recycled via a tail gas recovery component, making it more environmentally friendly and economical; preliminary mixing is performed in a premixing buffer hopper, followed by thorough homogenization in an airflow homogenization chamber, and under the control of the control unit, the product performance of each batch of material is uniform and more stable. This balances product performance with the goal of increasing equipment capacity, saving manpower and time, thus solving the technical problems in existing technologies. Overall, this invention features high automation, excellent homogenization and mixing effect, and safety and reliability, ensuring uniform and stable product performance for each batch of material, enabling increased equipment capacity, and effectively saving manpower and time costs. Attached Figure Description

[0017] Figure 1 is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 is a structural schematic diagram of the main material conveying unit in this utility model;

[0019] Figure 3 is a structural schematic diagram of the additive preparation unit in this utility model;

[0020] Figure 4 is a schematic diagram of the gas-liquid mixing unit of this utility model;

[0021] Figure 5 is a schematic diagram of the layout of the control unit in this utility model.

[0022] The reference numerals in the attached drawings are explained as follows: 1-Main material conveying unit; 11-Feeding assembly; 111-Mounting frame; 112-Lifting device; 113-Flow aid beater; 114-Feeding buffer hopper; 115-Filter; 116-Exhaust fan; 12-Filter assembly; 121-Feeding buffer hopper; 122-Discharge rotary valve; 123-Vibrating screen; 1231-First output port; 1232-Second output port; 13-First metal detector; 14-Defective product collection container;

[0023] 2-Additive preparation unit; 21-Feeding hopper; 22-Loss-in-weight scale;

[0024] 3-Premixed buffer;

[0025] 4-Second gold detector;

[0026] 5-Gas mixing unit; 51-Gas source assembly; 511-Air compressor; 512-Nitrogen generator; 513-Gas storage tank; 52-Airflow homogenization chamber; 521-Homogenizing gas assembly; 522-Airflow homogenization valve assembly; 523-Sampling valve; 524-High level switch; 525-Bag filter; 53-Feed rotary valve; 54-Negative pressure receiving hopper; 55-Pneumatic conveying pipeline; 56-Tail gas recovery assembly; 561-Tail gas buffer tank; 562-Recovery compressor; 563-Outlet buffer tank; 564-Negative pressure control valve assembly;

[0027] 6-Packaging unit;

[0028] 7-Shut-off valve;

[0029] 8-Third gold detector;

[0030] 9-Packaging rotary valve;

[0031] 10-Control unit; 101-Main control module; 102-Tail gas recovery control module; 103-Gas source control module; 104-Feeding control module; 105-Auxiliary agent preparation control module; 106-Sieving control module; 107-Conveying control module; 108-Packaging control module; 109-Electrical control cabinet; 1010-Pressure divider cabinet. Detailed Implementation

[0032] To facilitate understanding of this utility model, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected" to another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "upper," "lower," "left," "right," "inner," "outer," and similar expressions used in this specification are for illustrative purposes only.

[0033] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0034] As shown in Figures 1 to 5, this utility model provides a diaphragm material powder mixing device, including a main material conveying unit 1, an additive preparation unit 2 and a premixing buffer hopper 3. The main material conveying unit 1 includes a feeding component 11, a filtering component 12 and a first metal detector 13 connected in sequence.

[0035] Additive preparation unit 2 includes a feeding hopper 21 and a loss-in-weight scale 22 connected in sequence;

[0036] The first gold detector 13 and the loss-in-weight scale 22 are respectively connected to the input end of the premixed buffer hopper 3, and the output end of the premixed buffer hopper 3 is sequentially connected to the second gold detector 4, the gas mixing unit 5 and the packaging unit 6.

[0037] The gas mixing unit 5 includes a gas source component 51 and an airflow homogenization chamber 52. The gas source component 51 supplies nitrogen to the airflow homogenization chamber 52. The output end of the airflow homogenization chamber 52 is sequentially connected to a shut-off valve 7, a third metal detector 8, a packaging rotary valve 9, and a packaging unit 6. Preferably, the loss-in-weight scale 22 is equipped with a high-precision single-screw or twin-screw loss-in-weight scale, which can ensure real-time feeding while controlling accuracy to guarantee the additive content index of the final product. The packaging unit 6 can be configured to achieve fully automatic packaging of small bags, fully automatic packaging of ton bags, semi-automatic packaging, and automatic film coating, depending on customer selection, offering flexible options and greater investment flexibility.

[0038] The feeding assembly 11 includes a mounting frame 111, a lifting device 112 mounted on the top of the mounting frame 111, a flow-assisted beater 113 mounted in the middle of the mounting frame 111, and a feeding buffer hopper 114 mounted on the bottom of the mounting frame 111. The input end of the feeding buffer hopper 114 is connected to the output end of the flow-assisted beater 113. The flow-assisted beater 113 is also connected in sequence to a filter 115 and an induced draft fan 116. A feeding gate (not shown in the figure) is provided on the side of the mounting frame 111. Specifically, the lifting device 112 is preferably an electric hoist. The feeding assembly 11 can be configured with different numbers of feeding assemblies 11 according to the customer's production capacity requirements. It can be arranged in a straight line, or in double rows or multiple rows symmetrically. The specific equipment layout can be optimized according to the actual space on site. The feeding assembly 11 adopts a skid-mounted design, enabling compact layout and saving space, while solving problems such as long construction cycles and high construction costs. The ton bags can be lifted by the lifting device 112 and positioned at the flow-assisted beater 113. Small bags can also be unpacked at the feeding gate, making operation more flexible, increasing production capacity, and improving work efficiency. To eliminate potential safety hazards caused by static electricity during feeding, an electrostatic eliminator and a real-time charge-to-mass ratio monitoring device can be configured to ensure safe feeding.

[0039] The filter assembly 12 includes a feeding buffer hopper 121, a discharge rotary valve 122, and a vibrating screen 123 connected in sequence. The input end of the feeding buffer hopper 121 is connected to the output end of the feeding buffer hopper 114. The vibrating screen 123 has a first output port 1231 and a second output port 1232. The first output port 1231 is connected to a first metal detector 13, and the second output port 1232 is connected to a defective product collection container 14. Specifically, different types of vibrating screens 123, such as linear vibrating screens, square swing screens, circular vibrating screens, and spiral screens, can be selected according to the requirements of the diaphragm material's particle size, flowability, and yield. Furthermore, the vibrating screen 123 can be equipped with an auxiliary ultrasonic system to achieve stable operation and meet production capacity requirements, thereby solving the problem of expanding production capacity for ultrafine materials.

[0040] The bottom of the airflow homogenization chamber 52 is evenly equipped with homogenizing gas components 521 along the circumferential direction, and the homogenizing gas components 521 are correspondingly connected to airflow homogenization valve groups 522; a sampling valve 523 is provided at the bottom of the airflow homogenization chamber 52, a high-level switch 524 is connected to the top side wall of the airflow homogenization chamber 52, and a bag filter 525 is provided at the top of the airflow homogenization chamber 52. It is worth mentioning that, through the above-mentioned components and control unit 10, the airflow homogenization chamber 52 achieves pulsed airflow mixing, which can achieve full homogenization of the product without generating heat and causing adhesion, wall sticking, or agglomeration. The homogenization uniformity of the material can exceed the current industry standard; at the same time, the nitrogen after airflow mixing is recycled through the tail gas recovery component 56, which is energy-saving, environmentally friendly, and safe. Moreover, it can be optimized into single-unit, double-unit, or multi-unit modes according to site space, production capacity requirements, grade requirements, etc., and can also be designed from a volume of 5m³. 3 up to 700m 3 This allows for designs of different specifications.

[0041] The air source assembly 51 includes an air compressor 511, a nitrogen generator 512 and an air storage tank 513 connected in sequence. The output port of the air storage tank 513 is connected to the airflow equalization valve group 522.

[0042] The inlet of the airflow homogenization chamber 52 is connected to a feed rotary valve 53, the inlet of the feed rotary valve 53 is connected to a negative pressure receiving hopper 54, and a pneumatic conveying pipe 55 is connected between the inlet of the negative pressure receiving hopper 54 and the output of the second metal detector 4.

[0043] The negative pressure receiving hopper 54 is connected to a tail gas recovery assembly 56. The tail gas recovery assembly 56 includes a tail gas buffer tank 561, a recovery compressor 562, an outlet buffer tank 563, and a negative pressure control valve group 564 connected in sequence. The negative pressure control valve group 564 is connected to a pneumatic conveying pipeline 55. Specifically, the nitrogen conveying and recovery pipelines can be designed with one or more feeding / feeding lines, depending on the production capacity and layout, to achieve simultaneous operation of multiple hoppers, thereby realizing system matching and production capacity adjustment.

[0044] This utility model also includes a control unit 10, which includes a main control module 101 and electrically connected to the main control module 101 the following modules: a tail gas recovery control module 102, a gas source control module 103, a feeding control module 104, an additive preparation control module 105, a screening control module 106, a conveying control module 107, a packaging control module 108, and an electrical control cabinet 109. The electrical control cabinet 109 is electrically connected to a pressure divider cabinet 1010 and connects to various devices. Specifically, the tail gas recovery control module 102 controls the operation of the tail gas recovery component 56, the gas source control module 103 controls the operation of the gas source component 51, the feeding control module 104 controls the operation of the feeding component 11, the additive preparation control module 105 controls the operation of the additive preparation unit 2, the screening control module 106 controls the operation of the filtration component 12, and the conveying control module 107 controls the operation of the pneumatic conveying pipeline 55 and other valve switches.

[0045] The specific working principle of this utility model is as follows: First, the air compressor 511 is used to produce instrument air, providing the air source required by the device and the air hammer equipment; the nitrogen generator 512 and the pressurization system are used to provide 0.9MPaG high-purity nitrogen (purity: ≥99.5%).

[0046] Then, the raw materials to be processed are transported to the feeding area. Using the lifting device 112 of the feeding component 11, the main material of the ton bag is lifted to the top of the flow aid beater 113. After opening the bottom discharge port of the ton bag, the flow aid beater 113 is made to work to unload the main material into the feeding buffer hopper 114. The fine powder generated during the feeding process passes through the filter 115 and returns to the feeding buffer hopper 114. The exhaust gas is discharged to a safe position through the induced draft fan 116. At the same time, the additive filling hopper 21 is added.

[0047] Next, the main material from the feeding component 11 enters the vibrating screen 123 through the feeding rotary valve 122. After being graded by the vibrating screen 123, the unqualified material is collected in the defective product collection container 14 through the second output port 1232 and is recycled periodically. The qualified material enters the premix buffer hopper 3 through the first metal detector 13. At the same time, the additives also enter the premix buffer hopper 3 after passing through the loss-in-weight scale 22.

[0048] Furthermore, the material in the premixed buffer hopper 3 is conveyed by nitrogen negative pressure conveying, and then transported through the negative pressure receiving hopper 54 and bag filter 525 to the corresponding airflow homogenization chamber 52. The exhaust gas after conveying enters the exhaust gas buffer tank 561 for further recycling. When the material level in the airflow homogenization chamber 52 reaches the high alarm, the negative pressure conveying will trigger the emptying pipeline and stop the feeding program. At the same time, the system will prompt whether a chamber switching operation is required. The system will also determine whether the airflow homogenization operation is required based on whether the airflow homogenization chamber 52 is in a packaging state. When the airflow homogenization chamber 52 has completed feeding and is not in a packaging state, the airflow homogenization program can be started to perform pulsed, high-airflow homogenization operation. After the operation is completed, the system will indicate that homogenization is complete and the packaging process can begin.

[0049] Finally, the qualified materials in the airflow homogenization chamber 52 are packaged and stored in the packaging unit 6. In order to ensure the iron, zinc and copper content in the final product, in addition to the packaging rotary valve 9, the packaging process is also equipped with a third metal detector 8. After the materials are tested by the first metal detector 13, the second metal detector 4 and the third metal detector 8, the iron, zinc and copper content in the final product can be effectively guaranteed.

[0050] It is worth mentioning that the entire device, from raw material feeding, feeding, screening, conveying, pneumatic homogenization, packaging, tail gas recovery, instrument ventilation system and nitrogen generator unit, is operated, started and stopped, controlled sequentially and diagnosed by an advanced integrated control system control unit 10. This ensures the system is highly efficient and automated, while also saving the company manpower and material costs, and achieving efficient, stable and safe operation of the entire device.

[0051] This invention relates to a device capable of producing 10,000 to 500,000 tons of high-performance products per year. It addresses the critical defects of conventional mixing equipment currently on the market, such as mechanical stirring, circulating homogenization, and air-cloth homogenization, which suffer from uneven mixing, hot spots, agglomeration, and difficulty in cleaning residual materials. This invention solves the problem of ultrafine screening, ensuring high production capacity while achieving advantages such as narrow particle size distribution, good uniformity, and low impurity increment in the final product, thus meeting the different production capacity layouts and needs of various customers.

[0052] In summary, the technical solution of this utility model can fully and effectively achieve the aforementioned objectives. Furthermore, the structure and functional principles of this utility model have been fully verified in the embodiments, achieving the expected effects and objectives. Without departing from the principles and essence of this utility model, various changes or modifications can be made to the embodiments. Therefore, this utility model includes all substitutions within the scope mentioned in the patent application claims, and any equivalent changes made within the scope of this patent application are within the scope of the patent application.

Claims

1. A diaphragm material powder mixing device, comprising a main material conveying unit, an additive preparation unit, and a premixing buffer hopper, characterized in that: The main material conveying unit includes a feeding assembly, a filtering assembly, and a first metal detector connected in sequence; the auxiliary agent preparation unit includes a feeding hopper and a loss-in-weight scale connected in sequence; the first metal detector and the loss-in-weight scale are respectively connected to the input end of the premixed buffer hopper, and the output end of the premixed buffer hopper is connected in sequence to a second metal detector, an air mixing unit, and a packaging unit; the air mixing unit includes a gas source assembly and an airflow homogenization chamber, the gas source assembly is used to supply nitrogen to the airflow homogenization chamber, and the output end of the airflow homogenization chamber is connected in sequence to a shut-off valve, a third metal detector, a packaging rotary valve, and the packaging unit.

2. The diaphragm material powder mixing device according to claim 1, characterized in that: The feeding assembly includes a mounting frame, a lifting device at the top of the mounting frame, a flow aid beater in the middle of the mounting frame, and a feeding buffer hopper at the bottom of the mounting frame. The input end of the feeding buffer hopper is connected to the output end of the flow aid beater. The flow aid beater is also connected in sequence to a filter and an induced draft fan. A feeding gate is provided on the side of the mounting frame.

3. The diaphragm material powder mixing device according to claim 2, characterized in that: The filtration assembly includes a feeding buffer hopper, a discharge rotary valve, and a vibrating screen connected in sequence. The input end of the feeding buffer hopper is connected to the output end of the feeding buffer hopper. The vibrating screen is provided with a first output port and a second output port. The first output port is connected to the first metal detector, and the second output port is connected to a defective product collection container.

4. The diaphragm material powder mixing device according to claim 1, characterized in that: The bottom of the airflow homogenization chamber is evenly distributed with homogenizing gas components along the circumferential direction, and the homogenizing gas components are correspondingly connected to the airflow homogenization valve group; the bottom of the airflow homogenization chamber is provided with a sampling valve, the top side wall of the airflow homogenization chamber is connected with a high material level switch, and the top of the airflow homogenization chamber is provided with a bag filter.

5. The diaphragm material powder mixing device according to claim 4, characterized in that: The gas source assembly includes an air compressor, a nitrogen generator, and a gas storage tank connected in sequence, and the output port of the gas storage tank is connected to the airflow homogenization valve group.

6. The diaphragm material powder mixing device according to claim 4, characterized in that: The inlet of the airflow homogenization chamber is connected to a feed rotary valve, the inlet of the feed rotary valve is connected to a negative pressure receiving hopper, and a pneumatic conveying pipeline is connected between the inlet of the negative pressure receiving hopper and the output port of the second metal detector.

7. The diaphragm material powder mixing device according to claim 6, characterized in that: The negative pressure receiving hopper is connected to a tail gas recovery assembly, which includes a tail gas buffer tank, a recovery compressor, an outlet buffer tank, and a negative pressure control valve group connected in sequence. The negative pressure control valve group is connected to the pneumatic conveying pipeline.

8. The diaphragm material powder mixing device according to claim 1, characterized in that: It also includes a control unit, which includes a main control module and an exhaust gas recovery control module, a gas source control module, a feeding control module, an additive preparation control module, a screening control module, a conveying control module, a packaging control module, and an electrical control cabinet electrically connected to the main control module. The electrical control cabinet is electrically connected to a pressure divider cabinet.

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