vacuum pump in film evaporation of learn about the application

Vacuum pumps are widely used in film evaporation systems. In this field, commonly used vacuum pumps are: screw pump, single-stage/two-stage rotary vane vacuum pump, Roots pump, etc.

ntroduction to the concept of thin film evaporation

The evaporation of liquid by forming a film is called film evaporation. The principle of film evaporation can accelerate evaporation is that under the condition of reduced pressure, the liquid forms a film and has a large vaporization surface area. The heat is transmitted quickly and evenly without the influence of liquid co pressure, which can better prevent the overheating of materials. It has the advantages of low heating temperature, short time, fast evaporation speed, continuous operation and shortened production cycle.

What method is used for film evaporation?

Xiao Bian knows of two ways: one is to make the liquid film flow quickly through the heating surface and evaporate; The other is to make the extract boil violently to produce a large amount of foam, and use the internal and external surfaces of the foam as the evaporation surface for evaporation. The latter method is widely used.

vacuum pump in film evaporation of function

During evaporation operation, maintaining vacuum operation can reduce the evaporation temperature, further improve the production intensity, and reduce the corrosive environment of the solution to the materials. The multi effect evaporation system ensures the necessary temperature difference in order to maintain the pressure of its evaporation chamber to decrease gradually. Among them, it must be connected with the vacuum device. The vacuum degree has a great impact on the total temperature difference of the entire evaporation system.

In evaporation operation, the vacuum degree of vacuum pump is a very important process condition. According to different working conditions, there are many kinds of vacuum equipment available.