Evaporation System: Types and Design Aspects
Authors: Dr. Pankaj Kumar, Er. Dhritiman Saha and Er. Chandan Solanki
Food Grains and Oil Seeds Processing Division, ICAR-CIPHET, Ludhiana

Evaporation is an important unit operation, which is used for solvent removal from a solution, slurry or suspension of solid in a liquid. The purpose is to concentrate a non-volatile solute, such as organic compounds, inorganic salts, acids or bases from a solvent. The most common solvent in most of the evaporation systems is water. Evaporation is normally stopped before the solute starts to precipitate in the operation of an evaporator. It has wide application in food processing industries to make concentrates of fruit and vegetable juices. Moreover, in dairy sector, it is used to concentrate the milk. Various design of evaporators is available in market, we have to select the appropriate as per our requirement. If desired design is not available in market we can design the evaporation system as per our requirement.

Type of Evaporators
Evaporator consists of a heat exchanger for boiling the solution with special provisions for separation of liquid and vapour phases. Most of the industrial evaporators have tubular heating surfaces. The tubes may be horizontal or vertical, long or short; the liquid may be inside or outside the tubes.

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About Author / Additional Info:
I am working as a scientist at ICAR-CIPHET, Ludhiana (ISO 9001:2015 institute since last 2 years. Our team work mainly focus on the food grains and oil seeds processing