Wiped Film Evaporator

The Wiped Film Evaporator (WFE) is used to concentrate, distil, strip, dehydrate, and deodorise goods that are heat-sensitive or viscous. A very broad range of feed compositions, from 1% to over 95% concentration, can be handled by the machinery. As listed in the table below, WFE has a number of advantages. The self-cleaning continuous contact wipers create and refresh the thin film while the operation is continuing with a single pass. By preventing residue and colour buildup, this procedure increases product yield. It contains a built-in condenser that minimises pressure drop and preserves vacuum.

WIPED FILM EVAPORATOR (WFE)

The WFE's operational procedure is straightforward but nevertheless efficient. The spinning distribution plate spreads the feed around the inner surface of the shell after being injected at the top of the unit. Wipers that have been specially created for the job wipe the feed, generating and refreshing the film. Even for very viscous fluids, this thin sheet permits an efficient heat transmission. The low boiling component evaporates and moves through an entrainment separator. This reduces the amount of liquid droplets and vapour that are carried over. Through the vapour line, the vapours are evacuated and condensed on an optional external condenser. The unit is a short path/molecular distillation unit since the central section of the evaporator is equipped with a condenser for certain applications that necessitate low pressure drop.