The falling film evaporator is to add the material liquid from the upper tube box of the heating chamber of the falling film evaporator, and distribute it evenly into the heat exchange tubes through the liquid distribution and film forming device, and form a uniform film under the action of gravity, vacuum induction and air flow Flow from top to bottom. During the flow process, it is heated and vaporized by the heating medium in the shell side, and the generated vapor and liquid phase enter the separation chamber of the evaporator together. After the vapor and liquid are fully separated, the vapor enters the condenser for condensation (single-effect operation) or enters the next-effect evaporator as The medium is heated to achieve multi-effect operation, and the liquid phase is discharged from the separation chamber.
Falling film evaporators are widely used in the evaporation and concentration of water or organic solvent solutions in medicine, food, chemical, light industry and other industries. Falling film evaporators can be widely used in waste liquid treatment in the above industries. It is especially suitable for heat-sensitive materials. The equipment is continuously operated under vacuum and low temperature conditions. It has high evaporation capacity, energy saving and consumption reduction, low operating costs, and can ensure the invariance of materials during the evaporation process.