Multistage flash evaporator providing isolation of impure stage distillate flows from the main duct distillate flow

摘要

A conventional cross-flow or paired-stage multi-stage flash evaporator plant is provided with duct means for collecting distillate from collection trays in the successive evaporator units in the plant. Distillate from individual units is diverted to a bypass flow path from the duct means when it is detected to be contaminated with brine.