Flash Evaporation Desalination

This paper reports on the results of experimental investigations
of flash evaporation from superheated jet issues vertically
upward from a round straight nozzle of 81.3 mm diameter.

For the investigated range of jet superheat degree and velocity,it was
shown that flash evaporation enhances with initial temperature increase.
Due to the increase of jet inertia and subsequently the delay of
jet shattering, increase of jet velocity was found to result in
increase of evaporation "delay period".An empirical equation
predicts the jet evaporation completion height was developed, this
equation is thought to be useful in designing the flash evaporation
chamber. In attempts for enhancement of flash evaporation, use of
steel wire mesh located at short distance downstream was found
effective with no consequent pressure drop.