How Short Path Evaporation Works

In a short path evaporator, the rotor cage assembly surrounds an internal condenser and revolves at moderate speeds.

Feed enters above the distributor and is spread into a thin film on the inside surface of the shell. The rollers on the rotor cage gently agitate the film.

The product travels down the heated surface in a very short time while generating vapors. These vapors flow through the rotor and condense on the internally mounted condenser. This short vapor path minimizes pressure drop.

The distilled product and the remaining bottoms are taken out through separate outlets.

The cage type construction in a standard rotor of a short path evaporator allows placement of the internal condenser, extending the operating pressure capability from 1 mbar to 0.001 mbar.

Applied heating temperature is in the range of 300°F to 650°F.