MULTIPLE EFFECT EVAPORATION
Feeding of Multiple Effect Evaporators
Advantages of Multiple Effect Evaporators
An evaporator is essentially a heat exchanger in which a liquid is boiled to give a vapour, so that it is also, simultaneously, a low pressure steam generator. It may be possible to make use of this, to treat an evaporator as a low pressure boiler, and to make use of the steam thus produced for further heating in another following evaporator called another effect.
Consider two evaporators connected so that the vapour line from one is connected to the steam chest of the other as shown in Fig. 8.2, making up a two effect evaporator.