Scrapped Surface/Thin Film Evaporator is designed for evaporation of highly viscous and sticky products, which cannot be otherwise evaporated. This type of evaporators have been specially designed to provide high degree of agitation, effecting heat transfer as well as scrapping the walls of the evaporator to prevent deposition and subsequent charring of the product.
This is ideal for concentration of high viscous material and products with higher solids. This is also used as evaporative crystallizer. Sometimes these are used in series with falling film evaporator as finishing effect for achieving higher concentration. In this type of evaporator, liquid is pumped through heat exchanger tubes at high velocity (1.5-4.0 m/s) avoiding precipitation and creating high turbulence; liquid is then passed through vapor separator for separation of vapor and finally condensing the vapor in the condenser. Concentrated liquid is continuously discharged from bottom of vapor separator.
Evaporative crystallization of brine (Nacl)(Vacuum Salt processing)
The agitated thin film evaporator is well suited for concentration of viscous and heat sensitive liquids such as gelatin, antibiotics, fruit juices, and solvent mix etc. The thin film evaporator reduces fouling and liquid residence time in the evaporator. In the vertical agitated thin film evaporator feed liquid is feed at the top of evaporator and is uniformly distributed in the form of thin film by the wiper blades on vertical cylindrical heat transfer area, inside the unit. Evaporation of water / solvent takes place as the thin film moves down the heat transfer area.
Use of falling film evaporator with multiple effects ensures high energy efficiency & is ideal for concentration of heat sensitive products, with low scaling tendency. Multi-effect falling film evaporator with TVR as well as MVR are designed and manufactured at SSP''s manufacturing centers.