Multi-stage reaction kettle

Abstract

The invention relates to the technical field of reaction kettle design, and discloses a multi-stage reaction kettle which comprises N stages of kettle bodies sequentially sleeved from top to bottom and from inside to outside, an overflow port is formed in the side wall of each stage of kettle body close to the top cover of the kettle body, and the end part of each stage of kettle body provided with the overflow port is used as a non-sleeved end to be exposed outside; each stage of kettle body is provided with a material receiving opening for receiving materials outputted from the overflow opening of the previous stage of kettle body from the second stage of kettle body; and each stage of kettle body is provided with a feeding hole. The overflow ports are formed in all stages of reaction kettles so that continuous reaction is realized, and the yield can be greatly increased; meanwhile, a return pipeline is arranged between the last-stage kettle body and the first-stage kettle body so that the particle size distribution of the product can be effectively regulated and controlled; for the preparation of the ternary precursor, the single-kettle continuous synthesis of the ternary precursor with the same component or different components and narrow core-shell structure distribution becomes possible, the particle size distribution of the ternary precursor is effectively improved, themicro powder in the product is reduced, the utilization rate of small-particle wastes in a reaction system is improved, the production cost is saved, and the product performance is optimized.

Description

technical field [0001] The invention relates to the technical field of reactor design, in particular to a multistage reactor. Background technique [0002] With the rapid development of the lithium-ion battery industry, the industry's requirements for the performance of ternary cathode material precursors are also getting higher and higher. With the continuous improvement of energy density requirements for vehicle-mounted lithium-ion power batteries, nickel-cobalt-manganese ternary cathode materials continue to develop in the direction of high nickel content, high voltage, high compaction density and high safety. The nickel-cobalt-manganese ternary precursor is crucial to the production of ternary cathode materials, and the quality of the ternary precursor directly determines the performance of the ternary cathode material. The high-performance nickel-cobalt-manganese ternary precursor is the basis for the production of ternary cathode materials for lithium-ion power batter...

AI Technical Summary

Problems solved by technology

However, the multi-reactor series synthesis process needs to use multiple reactors at the same time, resulting in a waste of resources and is not conducive to the improvement of production efficiency.

[0004] The patent with the publication number CN205084734U discloses a secondary reactor, which is suitable for graded reactions, has a simple structure, is convenient to manufacture, and is low in cost. It is a rotary reaction, and the production efficiency still cannot be substantially improved, and its number of stages is small, which is not suitable for the production of products that require more stages of reactions to increase the particle size of the product

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