Multi-effect Evaporation

The heat released by 1kg steam condensation is basically the same as the heat absorbed by evaporation of 1kg water. Therefore to single-effect evaporation, 1kg water in the material for evaporation will consume 1kg live steam; if the secondary steam is used to heat up the steam for the next effect, the consumption of secondary steam and live steam will be cut down by 50%. When the number of effect increases, steam consumption decreases while the investment in equipment increases substantially. Therefore usually it shall not be more than 5 effects.

Multi-effect Evaporation (Click to enlarge)