What is the difference between falling film evaporators and forced circulation evaporators?/
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Why are different devices used in different places?
Forced-circulation evaporators are mainly used for materials that tend to form scale or crystals, primarily due to their high heat transfer coefficient； In contrast, falling film evaporators are mainly used for materials that are not prone to scaling or crystallization.
The difference lies in the properties of the materials to be processed; for high-viscosity materials that tend to form scale, especially those in the form of salt solutions, forced-circulation evaporators are more suitable. For heat-sensitive substances, as well as in cases of solutions containing small amounts of solids and solutions that tend to form a moderate crust, falling film evaporators are used.
Oh! What insight, Zhang! Thank you for coming back!
Reply to 5# zhulimin10213: I wonder if forced circulation can be used to reduce falling film evaporation