Forced Circulation Evaporators

These types of evaporators are recommended for the concentration of high viscosities solutions/slurries which have a tendency to crystallize or produce scales.
The circulating product is heated when it flows through the heat exchanger and then partially evaporated when the pressure is reduced in separator. The liquid product is typically heated only a few degrees for each pass through the heat exchanger.
This type of evaporator is also used in crystallization applications because no evaporation and therefore no concentration increase, takes place in the heat transfer surface. Evaporation occurs as the liquid is flashed evaporated in flash vessel/separator. 
Advantage :

• Ideal for high crystallizing and high viscosity solutions amp; Slurries.
• Single or multiple effect evaporation
• High operational flexibilities, heat transfer co-efficient, vapours liquid separation.
• Low temperature rise operation.
• Minimized fouling due to high velocities amp; static head.
• High turn down ration.