Falling Film Evaporator
Working Principle
In tube falling film evaporation, the feed liquid is introduced into the upper tube header of the heating section of the falling film evaporator. Through liquid distribution and film-forming devices, it is evenly distributed to each heat exchange tube. Under the combined effects of gravity, vacuum induction, and airflow, the liquid forms a uniform film flowing downward. During this process, the liquid is heated and vaporized by the heating medium in the shell side. The generated steam and liquid phase together enter the separator of the evaporator, where thorough vapor-liquid separation occurs. The steam then enters the condenser for condensation (in single-effect operation) or proceeds to the next evaporator to serve as the heating medium, enabling multi-effect operation. The liquid phase is discharged from the separator.
Special Characteristics
Optimal product quality
High energy efficiency
Utilization of recovered waste heat
Simple process control and automation
Flexible operation