The falling film evaporates can be operated with a low temperature difference and since the product residence time is very less, they are best suited for liquids which are temperature sensitive, have a high rate of specific heat transfer ,particularly for non-crystalline solution.Having low liquid holding volumes ,the falling film evaporators are easy to operate, clean , switch to another product and are extremely sturdy, thus the most frequently used types.
Caution must be used to ensure a continuous film wetting rate and to prevent nucleate boiling;otherwise ,the rate of heat transfer will fall dramatically and the rate of fouling on the heat transfer surface will increase.
Falling film evaporator is mostly used in industries for the treatment of heat sensitive equipments.Falling film evaporator will help in the food processing industry, pharmaceutical industry,paper industry and heat sensitive manufacturing products.