Filtering concentration device and method for small ternary precursor particles

Abstract

The invention relates to the technical field of filtering concentration devices, in particular to a filtering concentration device and method for small ternary precursor particles. The filtering concentration device comprises a cylinder, a first head, a second head and a material inlet, wherein one or more groups of rack pipes are arranged on the inner wall of the cylinder, micro-porous filtrationmediums communicated in the rack pipes are arranged on the rack pipes, and the parts, outside the cylinder, at the ends of the rack pipes automatically run by controlling valves, the liquid level, the pressure, the flow and a touch screen PLC. The filtering concentration device has the advantages that the concentration of the ternary product solid particles in a reaction kettle is increased by 20%-200%, the direct yield is improved to 98%, the product morphology is improved, the size of the particles is uniform, the size distribution is more narrow, and the device is more suitable for production of the small single crystal particles; the reaction period is shortened, the solid particles can return to the reaction kettle in time to participate in a reaction for crystal growth, the yield isimproved, the production cost is reduced, the inlet material flow speed can be increased, the product cannot be lost, the inlet amount of the reaction kettle can be increased, the concentration effect is good, and the production efficiency is high.

Description

technical field [0001] The invention relates to the technical field of filtration and concentration equipment, in particular to a filtration and concentration device and a filtration and concentration method for small particles of ternary precursors. Background technique [0002] As we all know, the electrification of automobiles has become the general trend, and lithium-ion power batteries with high energy storage have become the largest demand growth point in the battery industry. At present, power battery companies are mainly distributed in China, Japan, and South Korea, and China has undoubtedly become the world's largest producer of lithium batteries and their cathode materials (the core material that determines the energy density of lithium batteries). [0003] According to the different cathode materials, the current vehicle power batteries are mainly divided into lithium iron phosphate batteries and ternary lithium batteries. Lithium iron phosphate batteries have go...

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Problems solved by technology

However, the current concentration technology adopts the method of clapboard settling. By limiting the overflow velocity of the feed liquid, the feed liquid crystallizes in the cylinder and then settles. The flow rate of the feed is controlled and cannot be too fast, because the feed liquid Once the flow rate is too fast, it will cause the feed liquid to flow out from the overflow port before the crystallization settles, resulting in the loss of the product, which in turn will cause the feed rate at the reactor to be controlled and cannot be increased, which will cause the entire reaction The system cannot have high production efficiency

[0006] Therefore, the existing concentration device has the problems of low solid particle content, inability to speed up the feed flow rate, loss of product, inability to increase the feed amount of the reactor, poor concentration effect and low production efficiency

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