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How does the evaporator work?

Aug 13, 2019

The heating chamber provides the liquid with the heat needed for evaporation, and makes the liquid boil and vaporize.

The evaporation chamber completely separates the gas-liquid phase.

The steam produced in the heating chamber contains a large number of liquid droplets, which can be separated from the steam by means of self-condensation or defrosting devices in the larger evaporation chamber.

Usually the defuser is located at the top of the evaporation chamber.

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According to the movement state of solution in the evaporator:


The boiling solution passes through the heating surface several times in the heating chamber, such as the central circulation tube type, the hanging basket type, the external heat type, the lieven type and the forced circulation type.

One-way type.

The boiling solution passes through the surface once in the heating chamber, and the concentrated solution is discharged without circulating, such as rising, falling, stirring, and centrifugal.

Direct contact.

Heat transfer by direct contact between a heating medium and a solution, such as a submerged combustion evaporator.

During the operation of the evaporator, a large amount of heated steam is consumed. In order to save heated steam, multi-effect evaporator and steam recompression evaporator can be used.

Evaporator is widely used in chemical industry, light industry and other sectors.