Falling film evaporator is a reduced-pressure distillation unit for concentrating liquid. The liquid to be vaporized is sprayed onto the heat exchange tube from the upper heat exchanger, and a thin liquid film is formed on the heat exchange tube. In this way, the static liquid level pressure is reduced when the liquid is boiling and evaporating, so as to improve the heat exchange and evaporation efficiency. It is commonly used in food, medical, chemical and other related industries.
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