Material into the circulating pump after the feed pump (electric metering pump) pressure, after the circulating pump further obtain energy into the forced circulation heater, the material in the heater heat exchange flow, in the flow process with shell steam heat exchange and heated to the boiling point, the material heated to the boiling point into the crystallization for steam and liquid separation, the bottom flow of the separator after pressurized by the circulating pump into the next cycle.

With the continuous concentration of materials in the system, the concentration of materials is constantly increasing. Material density is tested on line by a densitometer installed on the cycle line. When the concentration of the material reaches the saturation state, there will be grain precipitation, etc. With the increase of oversaturation, the number of precipitated grains will also increase, and finally form a slurry containing a large number of grains. As evaporation proceeds, the level of the crystallizer will drop, and the feed pump will continuously replenish the level of the crystallization. The steam entering the shell process of the heater is provided by an electric thermal steam generator. While the materials in the system are continuously concentrated, the steam in the heater shell process will be continuously condensed, and the condensed water will be continuously discharged from the system. The secondary steam generated by evaporation is sent to the surface condenser, and condensed after heat exchange with the cooling water. Finally, the non-condensate gas is pumped from the vacuum pump to the atmosphere to ensure that the system operates under the designed vacuum.