Short-range molecular distillation scraper evaporator is a liquid-liquid separation technology, by using the difference in the free path of different substances under high vacuum, the process of distillation and purification of heat-sensitive substances or substances with high boiling point. Mainly used in chemical, pharmaceutical, petrochemical, fragrance, plastic oil and other industrial fields. The minimum evaporation area of glass molecules is 0.032 square, and the maximum can be 0.6 square.