单选题The demisters installed in a flash-type evaporator serve to （）Adeaerate the first effect distillateBfilter the condensed flash vaporsCdeaerate the first and second effect distillateDremove small water droplets entrained in the flashed vapor
单选题
The demisters installed in a flash-type evaporator serve to （）
A
deaerate the first effect distillate
B
filter the condensed flash vapors
C
deaerate the first and second effect distillate
D
remove small water droplets entrained in the flashed vapor
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名词解释题首关消除（first-pass effect）