This technology is particularly suitable for viscous and sensitive liquids, having a substantial proportion of dry matter. It is reserved for processes which require a small amount of evaporation compared to the inflow.
The liquid is sent to a separator at a lower pressure than the product's boiling temperature. With this process, a rapid decrease in temperature of the product and water evaporation could be obtained.
Flash-cooling produces partial water evaporation without putting the product in contact with an exchange surface or another element likely to transmit energy. There are no clogging problems.
An additional method
With flash-cooling, evaporation takes place and the product is cooled. In addition to another evaporator, it is often used to finish the concentration and reduce the temperature of the concentrated product.