Multiple Effect Evaporation Plant

Rising Film Vacuum Evaporator operate on a "thermo-siphon" principle. Feed enters at the bottom of the heating tube and as it heats, steam begins to form. The ascending force of this steam produces during the boiling causes liquid and vapours to flow upwards in parallel flow. At the same time the production of vapour increases and the product is pressed as thin film on the walls of the tubes and rises upwards. This co-current upward movement against gravity has the beneficial effect creating a high degree of turbulence in the liquid which is advantageous during evaporation of highly viscous products and for the products that have tendency to foul during heating surfaces. These types of evaporators are often used with product recirculation, where some of the formed concentrate is reintroduced back to the feed inlet in order to produce sufficient liquid loading inside the heating tubes.Advantages : Ideal for clear, heat sensitive foaming and corrosive solutions. Continuous, single pass operation with minimized retention time. Single or multiple units with high heat economy. High heat transfer co-efficient. Low power requirement. Simple construction. Low floor space requirement. Applications : Food Herbal extracts Pharmaceuticals Dairy Dyestuff Ammonium Nitrate. Sugar Syrups.