What is wiped film evaporator?

Wiped film evaporator is a new type of high-efficiency evaporator which is through a rotary wiper to make a film, and has a high-speed flow, high heat transfer efficiency, short residence time (about 10~50S), and can be used for falling film evaporation under vacuum conditions.

1. Small vacuum pressure drop

The vaporized gas of the material is sent from the heating surface to the external condenser, and there is a certain pressure difference. Compared with the general evaporator, the scraper-type thin film evaporator has a large gas traversing space, and the pressure inside the evaporator and inside the condenser are almost equal, so the pressure drop is small.

2. Low operating temperature

The evaporation process of the wiped film evaporator can be maintained under a high vacuum degree. Due to the increase of vacuum degree, the corresponding boiling point of material is rapidly reduced, so that the operation can be carried out at a lower temperature to reduce the thermal decomposition of the hemp material.

3. Short heating time

Wiped film evaporator is particularly suitable for the evaporation of heat sensitive materials because of its unique structure, the wiper has a pumping action, so that the residence time of the material in the evaporator is very short, due to the high speed of the film on the heated evaporator Turbulence prevents the product from staying on the evaporator surface.

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