Evaporation of Small Water Drops Containing Salt in a High Pressure Steam Environment

Abstract

It is important ot be able to calculate the lifetime of drops in central power station boilers so as to determine their penetration into the superheater sections of once-through boilers and as necessary input for the design of spray separators in recirculation boilers. The evaporation rate may be reduced by a large number of factors such as the elevation of the boiling point when the salt concentration in a drop becomes substantial or by the fact that the drop is evaporating in a medium with a density which may be more than a quarter of the water density. All the factors are considered and calculations suitable for deskwork are presented.