What is Falling Film Evaporator?
A falling film evaporator is widely used in the evaporation and concentration of water or organic solvent solutions in the pharmaceutical, food, chemical, light industry and other industries, and can be widely used in the waste treatment of the above industries. It is especially suitable for heat sensitive materials, the equipment is continuously operated under vacuum and low temperature conditions, with high evaporation capacity, energy saving, low operating cost. It can ensure that the material is invariable during evaporation.
Working Principle of Falling Film Evaporator
The working principle of falling film evaporators can be descriped as follows. The liquid is added to the upper tube of the heating chamber of the falling film evaporator. Through the liquid distribution and film forming device, it is evenly distributed into the heat exchange tubes. Under the action of gravity and vacuum induction and air flow, it forms a uniform film from the top to the bottom. During the flow, it is heated and vaporized by the shell-side heating medium. The generated steam and the liquid phase enter the separation chamber of the evaporator. The vapor-liquid is sufficiently separated, and the steam enters the condenser for condensation (single-effect operation) or enters the next-effect evaporator. The medium is heated to achieve multi-effect operation, and the liquid phase is discharged from the separation chamber.
Thin Film Evaporator
A thin film evaporator is widely used in chemical labs and industrial field to separate solvents through evaporation. It has a cylindrical body which has a rotor within. The function of rotor is to distribute mixture in order to get mixture heated evenly.
Wiped Film Evaporator
A wiped film evaporator is a device used to separate mixed solvents through evaporation. In the whole process, mixture will be put into tube and be fully heated by heating media around. During the mixture goes downwards, there is a rotor rotating to distribute flow to tube.
Climbing Film Evaporator.
A climbing film evaporator is a kind of evaporator which is to separate mixed solvents through evaporation. It is not only used in chemical and industrial, but also cooking field. For example, it can be used to increase the concentration of juice.