introduction:
The forced circulation evaporative crystallizer is a continuous crystal slurry circulation type. During operation, the material liquid is added from the lower part of the circulation pipe, mixed with the crystal slurry leaving the bottom of the crystallization chamber, and then pumped to the heating chamber. The crystal slurry is heated in the heating chamber (usually 2-6°C), but no evaporation occurs. After the hot crystal slurry enters the crystallization chamber, it boils to make the solution reach a supersaturated state, so that part of the solute deposits on the surface of the suspended crystal grains, causing the crystals to grow. The crystal slurry as a product is discharged from the upper part of the circulation pipe. The forced circulation evaporation crystallizer has a large production capacity, but the product has a wide particle size distribution.
The forced circulation evaporative crystallizer is abbreviated as FC (Forced Circulation) crystallizer, which is composed of a crystallization chamber, a circulating pipe, a circulating pump, and a heat exchanger.
The crystallization chamber has a conical bottom. After the crystal slurry is discharged from the cone bottom, it is pumped through the heat exchanger with an axial flow circulating pump through the circulating pipe. After being heated or cooled, it enters the crystallization chamber again, so the cycle is endless, so this kind of crystallizer Belongs to the crystal slurry circulation type. The crystal slurry discharge port is located close to the bottom of the cone of the crystallization chamber, and the feed port is located at a lower position below the discharge port.
FC type crystallizer can be generally used for crystallization by evaporation method, partition cooling method or vacuum cooling method. The particle size of the product is about 0.8~4mm
Application range of forced circulation evaporation crystallizer:
Widely used in the production of chemical, light industry, medicine and other industries, wastewater evaporation and crystallization treatment.