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Muti-effect Forced Circulation Evaporator Crystallizer
The forced circulation evaporative crystallizer is a kind of continuous crystallizer with crystal slurry circulation.
The forced circulation evaporation crystallizer is referred to as FC crystallizer, which is composed of crystallization chamber, circulation tube, circulation pump, heat exchanger and so on.
The crystallization chamber has a conical bottom, after the crystal slurry is discharged from the cone bottom, it is pumped through the heat exchanger through the axial flow circulation of the circulation pipe, and it is heated or cooled, and then it enters the
crystallization chamber again, so the circulation is continuous, so the crystallizer belongs to the crystal slurry circulation type. The slurry discharge outlet is located near the bottom of the cone of the crystallization chamber, while the feed port is at a lower position below the discharge port.
The FC crystallizer can be used for crystallization by evaporation, wall cooling or vacuum cooling. The particle size of the product is about 0.8~4mm.
Working principle:
During operation, the feed liquid is added from the lower part of the circulation pipe, mixed with the crystal slurry leaving the bottom of the crystallization chamber, and sent to the heating chamber by the pump. The crystal paste is heated in the heating chamber (usually 2 ~ 6 ° C), but no evaporation occurs. After the hot crystal slurry enters the crystallization chamber and boils, the solution reaches a susaturated state, so that part of the solute is deposited on the surface of the suspended grain, making the crystal grow. The crystal slurry as a product is discharged from the upper part of the circulation tube. The production capacity of forced circulation evaporation crystallizer is large, but the particle size distribution of the product is wide.
Application:
Forced circulation evaporation crystallizer is widely used in chemical industry, light industry, medicine and other industries, wastewater evaporation crystallization treatment.
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