High Efficiency Rotating Film Evaporator / Molecular Short Path Distillation

High Efficiency Rotating Film Evaporator / Molecular Short Path Distillation

Rotating Film Evaporator Introduction

Molecular Distillation/Short Path Distillation is a comparatively new separation technology. It can separate liquid-liquid mixture under temperature that is far lower than boiling point by the difference of mean free path of molecules under high vacuum condition. Such separation is difficult or unable to achieve on normal distillation equipments. Molecular Distillation is especially suitable to separate substances of high boiling point, heat sensitive and easy oxidized..

Rotating Film Evaporator Advantages

1) Low operating pressures
2) Short residence time
3) High distillation rates
4) Low fouling on distiller wall
5) Grease-less magnetic sealed bearing, valves and joints
6) Perfect for heat sensitive materials

Rotating Film Evaporator Parameters

The operation process in the Thin Film Evaporator is simple but yet effective. Feed is introduced at the top of the unit and spread on the shell inner surface by the rotating distribution plate. Specially designed wipers wipe the feed thus creating and renewing the film. This thin film enables an efficient heat transfer even for highly viscous fluids. The low boiling component evaporates and passes through an entrainment separator. This minimizes the carry over of liquid droplets along with the vapors. The vapors are removed through the vapor line to an external condenser (optional) and condensed. For specific applications which demand low pressure drop, the central section of the evaporator is provided with a condenser, thus making the unit a short path/molecular distillation unit. In this case, the vapors are allowed to condense on the outside of the tube bundle and flow out of the vaporator via the condensate outlet provided at the centre.