一种磷酸铁锂浆料过滤系统及装置
By using a fully sealed ultrasonic vibrating screen and spray cleaning system, the problems of easy clogging and low precision in lithium iron phosphate slurry filtration equipment have been solved, achieving efficient and low-dust continuous production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NAVIGATE (SHANGHAI) SCREENING TECH CO LTD
- Filing Date
- 2025-07-28
- Publication Date
- 2026-07-17
AI Technical Summary
Existing lithium iron phosphate slurry filtration technology suffers from problems such as low filtration accuracy, easy equipment clogging, serious dust pollution, and low uptime, especially for high-viscosity slurries.
The ultrasonic vibrating screen adopts a fully sealed structure, combined with a spray cleaning system and a multi-layer screen design. The ultrasonic frequency is greater than 35KHZ, the amplitude is 15-25μm during screening, and it operates in a 33-37kHz sweep frequency mode during cleaning to achieve online cleaning.
It achieves efficient and continuous operation, with a screen clogging rate of less than 1%, filtration accuracy improved to 30μm, dust leakage reduced to 0.5mg/m3, cleaning time shortened by 50%, and impurity screening effect significantly improved.
Smart Images
Figure CN224506446U_ABST
Abstract
Claims
1. A lithium iron phosphate slurry filtration system, characterized by, It includes a spray tank containing slurry, a water storage tank, a buffer tank, and an ultrasonic vibrating screen; the ultrasonic vibrating screen has a basically sealed tank structure, and the tank has at least two layers of screen structure inside; the inlet at the upper end of the tank is connected to the outlet of the spray tank, and the finished product outlet at the lower end of the tank is connected to the inlet of the buffer tank. The cleaning water provided by the storage tank is delivered to the cleaning spray system of the ultrasonic vibrating screen and the spray system of the buffer tank via the delivery branch of the cleaning water pipeline. The outlet pipe of the buffer tank leads to the material spray drying process, and the buffer tank is equipped with a stirring device that can stir the internal material.
2. The lithium iron phosphate slurry filtration system of claim 1, wherein, The connecting pipelines between the spray tank, water storage tank, buffer tank and ultrasonic vibrating screen are equipped with several valves to control the opening and closing of the pipelines and fluid pressure and flow monitoring devices; the ultrasonic vibrating screen and the buffer tank are also equipped with material level sensors that can monitor the thickness of the internal material accumulation.
3. The lithium iron phosphate slurry filtration system of claim 1, wherein, The buffer tank is also equipped with a pressure transmitter that can monitor the internal pressure of the buffer tank in real time to prevent abnormal pressure from damaging the tank.
4. The lithium iron phosphate slurry filtration system of claim 1, wherein, The ultrasonic vibrating screen is also equipped with a breather that can vent or adjust the gas level inside the equipment; the buffer tank is also equipped with a tank breather that can vent or adjust the gas level inside the tank.
5. A filtering device for filtering lithium iron phosphate slurry having a viscosity of greater than 500 mPa-s, comprising an ultrasonic vibrating screen, characterized in that, Along the top and bottom, the ultrasonic vibrating screen is equipped with at least two layers of screen components inside, and the space where the screen is located is basically sealed. The ultrasonic vibrating screen is also equipped with a spray cleaning system that can spray water to act on the screen.
6. The filter device for lithium iron phosphate slurry according to claim 5, wherein The spray cleaning system provides at least two types of water jets at different angles to the screen, one of which has an angle of 30°±5° with the screen.
7. The filter apparatus for lithium iron phosphate slurry according to claim 5, wherein The spray cleaning system includes multiple spray water inlet pipes that can reach different screens. The upper part of the outer shell of the ultrasonic vibrating screen is equipped with a breather that can vent or adjust the gas storage in the equipment. It also includes a material level sensor that can monitor the thickness of the material remaining on each screen. The material level sensor is electrically connected to the start-stop control circuit of the spray cleaning system.
8. The filter apparatus for lithium iron phosphate slurry according to claim 5, wherein In the at least two-layer screen assembly, the aperture of the lower screen is not larger than that of the upper screen; the screen is selected from 304 plain weave screen and nylon 66 electrospun film.
9. The filter apparatus for lithium iron phosphate slurry as claimed in claim 5 wherein, The ultrasonic vibrating screen has a tank-shaped shell with a feed inlet at the top and a finished product discharge outlet at the bottom. Inside the tank-shaped shell, there are upper and lower screen assemblies. On the side of the tank-shaped shell, there are upper and lower screen discharge outlets corresponding to the upper and lower screen assemblies. The upper and lower screen discharge outlets are used for the discharge of waste materials and waste liquids during cleaning, as well as the discharge of overflow.
10. The filtration device for lithium iron phosphate slurry according to claim 9, wherein Both the upper and lower screens are equipped with a distributor to ensure that the slurry is evenly spread on the screen. The distributor for the upper screen is located below the feed inlet.