COMBINED MULTI EFFECT DISTILLATION SYSTEM

摘要

A compound multi effect distillation (MED) system of integrated backward and forward fed MED systems. Heated concentrate from the hottest effect of the backward fed MED system is delivered as feed to the hottest effect in the forward fed MED system, to generate a more concentrated brine than possible using any of the systems alone. Furthermore, coupling the systems creates additional operational advantages and increases distillation efficiency.

主权项

1. A compound multi effect distillation (MED) system comprising:
a backward fed MED system, comprising a condenser arranged to heat feed water and deliver the heated feed water to a coolest effect in the backward fed MED system, wherein each effect in the backward fed MED system is arranged to evaporate water from received feed water and deliver heated concentrate to a warmer effect, to yield a hottest concentrate from a hottest effect of the backward fed MED system; and a forward fed MED system, arranged to deliver the hottest concentrate obtained from the hottest effect of the backward fed MED system, to a hottest effect in the forward fed MED system, wherein each effect in the forward fed MED system is arranged to evaporate water from received concentrate and deliver cooled concentrate to a colder effect, to yield coldest and most concentrated brine from a coldest effect of the forward fed MED system.