The materials are evenly arranged in each evaporator tube through the liquid material distribution device on the top of the evaporator. Under the action of gravity, materials flow from top to bottom along the liquid film on the inner wall of the evaporator tube. During the whole process, the film evaporates through heat exchange with the heated steam on the outer wall of the evaporator tube. The flow direction of the secondary steam is the same, which further promotes the material and liquid moving downward along the inner wall of the evaporation tube and distributing into a film, and improves the heat transfer coefficient and efficiency.
Short residence time, not easy to cause material deterioration, suitable for handling heat-sensitive materials.
Since process fluids flow by gravity rather than being propelled by high temperature differential evaporation, low temperature differential evaporation can be used.
With small liquid retention, the falling-film evaporator can operate according to changes in energy supply, vacuum degree, feed volume, concentration, etc.
The heat transfer coefficient is higher because the solution flows as a film in the single-way evaporator.
The feed liquid of the falling film evaporator is added from the top of the evaporator and falls down the tube wall in a film under the action of gravity, evaporating and thickening in the process, and obtaining a concentrated liquid at its bottom. Falling film evaporator can evaporate the material with high concentration and high viscosity.
SUNKAIER Falling film evaporator is used for evaporation and concentration of water or solution in food, chemical, light industry and other industries, and can be used for waste liquid treatment in the above industries. It can also be used for evaporation of xylose, starch sugar, oligosaccharide and other aqueous solutions at low temperature.
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