The heat transfer in thin film
evaporator is very quick and efficient, thus demanding
lower surface area and heat input as compared to other
types of evaporator. Due to high vacuum distillation
and very short residence time the thin film evaporator
are suitable for handling wide range of heat sensitive,
high boiling and viscous feeds. Due to low rotor speeds
in the range of 100 to 150rpm, the horse power requirements
are very low. To reduce the pressure drop between
the evaporator and condenser, the internal condensers
can be provided to achieve short path distillation.
The thin film evaporators are designed to handle various
products with operating pressures up to O.1torr. Liquids
with viscosities above 2,00,000cps can be handeled
in these evaporators.