Sistema e método de desidratação

摘要

Provided are a dehydrating system and a dehydrating method which achieve improvement in a membrane performance. The dehydrating system includes a first preheater (3a); multiple dehydrating apparatuses (1a, 1b and 1c) which are connected in series downstream of the preheater and which are configured to remove water from an organic aqueous solution; and returning means (6) for returning a part of the organic aqueous solution having passed through one or more of the dehydrating apparatuses to the dehydrating apparatuses or the dehydrating apparatus upstream of the dehydrating apparatuses.