Falling film evaporation is the process of adding liquid from the upper pipe box of the heating chamber of the falling film evaporator, and evenly distributing it into the heat exchange tube through a liquid separation and film forming device. Under the action of gravity, vacuum induction, and airflow, it becomes a uniform thin film. Flowing from top to bottom. During the flow process, it is heated and vaporized by the shell side heating medium, and the generated vapor and liquid phases enter the separation chamber of the evaporator together. After the complete separation of vapor and liquid, the steam enters the condenser for condensation (single effect operation) or enters the next effect evaporator to heat the medium for multi effect operation, and the liquid phase is discharged from the separator.
Falling film evaporators are widely used for the evaporation and concentration of water or organic solvent solutions in pharmaceutical, food, chemical, light industry, and other industries, and can be widely used for waste liquid treatment in these industries. Especially suitable for thermal sensitive materials. The falling film evaporator operates continuously under vacuum and low temperature conditions. High evaporation capacity, energy saving and consumption reduction, low operating cost, can ensure the invariance of materials during the evaporation process.