The Tubular Forced Circulation Crystallizer FCC is similar to the Forced Circulation Evaporator FCE, where special separator designs are used to separate crystals from the recirculated crystal slurry.
It is an evaporative crystallizer mainly used with products having relatively flat or inverted solubility relative to the temperature. It is also used with compounds crystallized from solutions with scaling components, often for recovery/purification or elimination of products from liquid effluents (e.g. Zero Liquid Discharge system, ZLD).
The forced circulation crystallizer is particularly suited as final step in multiple-effect (ME) evaporation, thermal vapor recompression (TVR) or mechanical vapor recompression (MVR) arrangement because it can handle high solid content.
In a multi-stage system, Forced Circulation Crystallizers can be used in combination with Forced Circulation Evaporator or with Falling Film Evaporators