It can be divided into atmospheric, pressurized, and vacuum evaporation operations. Obviously, for heat sensitive materials such as antibiotic solutions, fruit juices, etc., they should be processed under reduced pressure. High viscosity materials should be evaporated using a pressurized high-temperature heat source for heating (such as heat transfer oil, molten salt, etc.)

It can be divided into single effect and multi effect evaporation. If the secondary steam generated by evaporation is directly condensed and no longer used, it is called single effect evaporation. If the secondary steam is used as the next heating steam and multiple evaporators are connected in series, this evaporation process is called multi effect evaporation.

Evaporation is the physical process of converting a liquid state into a gas state. Generally speaking, an evaporator is an object that converts a liquid substance into a gaseous state. There are a large number of evaporators in industry, among which the evaporator used in refrigeration systems is one of them. The evaporator is an important component among the four major refrigeration components. The low-temperature condensed liquid exchanges heat with the external air through the evaporator, vaporizes and absorbs heat, achieving the refrigeration effect. The evaporator mainly consists of two parts: a heating chamber and an evaporation chamber. The heating chamber provides the heat required for evaporation of the liquid, promoting its boiling and vaporization; The evaporation chamber completely separates the gas-liquid phases.