Principle of Thin Film Evaporator

2023/03/03

Thin film evaporator is a commonly used chemical equipment, which is mainly used to evaporate liquid or concentrate solution, evaporate it into a thin film, and separate the solute. The working principle of the thin-film evaporator is to use the centrifugal force generated inside the high-speed rotating cylinder to make the liquid form a liquid film, and the liquid film flows evenly along the surface of the cylinder to form a very thin liquid film on the heat exchange surface. After evaporation on the heat exchange surface, two phases of gas and liquid are produced, which are then separated by a decompression device.

The specific principle of the thin-film evaporator is as follows: the liquid enters the interior of the thin-film evaporator, and a very thin liquid film is formed by centrifugal force, and the liquid film flows evenly along the surface of the cylinder to separate the solute.

The liquid forms a very thin film-like liquid on the surface of the inner wall of the thin-film evaporator, and the film-like liquid forms a heat exchange surface with the air between the inner wall of the cylinder, through the heat transfer between the film of the liquid in the film and the air, The liquid is evaporated into vapor, which is separated by a pressure reducing device above the membrane. This allows evaporation of the liquid and separation of the solute.

The advantages of thin film evaporators are: high efficiency, energy saving, and good separation effect.

A thin-film evaporator can separate the solute and concentrate the solution. In addition, it also has the advantages of low operating cost, low evaporation temperature, and high heat transfer efficiency, and is widely used in evaporation and concentration processes in the fields of pharmaceuticals, chemicals, and food.

In short, a thin film evaporator is a chemical equipment that uses the rotation of a cylinder to generate centrifugal force. It is mainly used to evaporate liquids or concentrate solutions to achieve the separation of solutes.

It has the advantages of high efficiency, energy saving, and good separation effect, and has been widely used in pharmaceutical, chemical, food and other fields.

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