The Tubular Forced Circulation Evaporator FCE is the right solution to concentrate streams containing a big amount of suspended solids, medium-highly viscous fluids and products with high tendency to fouling. This kind of evaporator is also widely used as crystallizer, where special separator designs are used to separate crystals from the recirculated crystal slurry.

It is particularly suited as high concentration step in multiple-effect (ME) evaporation, thermal vapor recompression (TVR) or mechanical vapor recompression (MVR) arrangement because the forced circulation evaporator can handle more concentration values and/or higher solid content than a falling film evaporators.

In a multi-stage system, Forced Circulation Evaporators can be used in combination with Thin Film Evaporators/Dryers or with Falling Film Evaporators

FEATURES

• Medium to high heat transfer coefficient, especially for low viscous product under turbulent conditions

• High circulation flow-rate inside the heat exchanger

• Evaporation does not take place on the heating surface, but in the flash separator

• Long residence time due the high recirculation, therefore also high liquid hold-up

• Vacuum operation or at atmospheric condition

• Not suitable for sensitive product, due the long residence time