Falling Film Evaporators are designed for the production of concentrates from heat sensitive liquids.
from: GEA-Wiegand (click image for full story online)
The text on the above image from a Wiegand brochure reads:
FALLING FILM EVAPORATORS
Design Vertical shell-and-tube heat exchanger, with laterally or con- centrically arranged centrifugal separator.
Operation The liquid [...]