Reaction device for solid-liquid mixed system and operation method of reaction device

The invention discloses a solid-liquid mixing system reaction device which mainly comprises a reaction kettle, a stirring device, a liquid level meter and a multi-stage stirring device controller. The reaction device provided with multi-stage stirring has the advantages that the reaction device can be used for a solid-liquid mixing reaction system, especially a reaction system with poor fluidity of a large amount of solid products generated by liquid-liquid reaction; the phenomenon that solid materials adhere to the wall can be effectively avoided, the mass transfer and heat transfer efficiency of a reaction system is improved, the product quality is improved, meanwhile, PLC linkage control is arranged between a liquid level meter of the reaction kettle and multi-stage stirring, automatic opening or closing of stirring of all stages can be achieved along with rising or falling of the liquid level of the materials in the reaction kettle, and the production efficiency is improved. And the device is simple in st