In an MVR falling-film evaporator, liquid and vapor flow downward and in parallel. The feed liquid is preheated to the boiling temperature by the preheater, and a uniform liquid film is formed by the liquid distribution device at the top into the heating tube, where it is partially evaporated.Secondary steam and concentrate flow down the tube.
Features and applicable system:
The residence time of feed liquid in MVR evaporator is short, which can adapt to evaporation of heat-sensitive solution.Falling film evaporator is easy to burst the foam inside the tube, so it is also suitable for the evaporation of foamed materials;In addition, falling film evaporation is also suitable for high viscosity solutions.
Advantages:
Because falling film evaporator is liquid film heat transfer, its heat transfer coefficient is higher than other types of evaporator.In addition, there is no liquid column static pressure in falling film evaporation, and the heat transfer temperature difference is significantly higher than that of other types of evaporators, so it can achieve good heat transfer effect, with minimum one-time investment, which is the preferred evaporator form for owners.
