Forced Circulation Evaporators
Forced Circulation 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.
Forced Circulation Evaporators are specially designed for liquids that tend to scale, foul, highly viscous and crystallize depending upon the final concentration of the product. Feed is re-circulated in the shell and tube heat exchanger by pumping, heated under pressure to prevent boiling, and then flashed in the vapor liquid separator, where the absolute pressure is slightly less than in the heat exchanger, to obtain the required vaporization
Application
- Effluent Treatment plant
- Chemicals- common salts
- Spent Wash
