Improvements in distillation trays.

摘要

57 A distillation tray 1 a of the chordal weir sieve type has vapour passages. The density of vapour passages in the area B immediately between the inlet 2 and the outlet 4 of the tray 1 a is higher than in the remaining area A of the tray so that more vapour flow will be directed into the more active main liquid flow area B of the tray. Thus, the vapour leaving the tray from area A has substantially the same composition as the vapour leaving the tray from the area B.