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Falling Film Evaporators
Evaporators are used to increase the solid content in the liquids containing low solids, by evaporationg water or solvent from the liquid Evaporators basically consist of shell and tube heat exchanger columns called as calandrias. The product to be concentrated is passed through the tubes and the heating media, usually steam, is passed through the shell. The calandria tube side is under vacuum causing the liquid boiling at lower temperature, Thus making the operation economical and safe for heat sensitive products. Following are the types of evaporators depending upon the feed circulation configuration.
Falling Film Evaporators
Falling Film Evaporators are specially designed for heat sensitive products that have a low-scaling tendency. The In the Falling Film Evaporators, the liquid is fed at the top of the evaporator either using spray nozzle or through distribution plate to long tubes and allowed to fall down the walls forming film. Evaporation occurs on the surface of the film and not on the tube surface. It can be used for non-fouling and relatively nonviscous products where original properties have to be preserved.
- Herbal and Tea Extracts
- Dyestuff
- Pharmaceuticals
- Sugar Syrups
- Dairy & Food
- Spent Wash
