Patent ID: 8496806

Claim:
A dehydrator for separating water from a target liquid, comprising: at least two water separation membrane units which are provided in series in a flow direction of the target liquid, wherein an upstream water separation membrane unit is connected to suction means for sucking a gas phase passing through the upstream water separation membrane unit and containing water through one condenser, and the one condenser condenses water in the gas phase and thereby separates the water, the gas phase sucked by the suction means from the one condenser is transferred to at least one downstream condenser provided downstream of the one condenser, and the downstream condenser condenses water in the gas phase and thereby separates the water, and wherein a downstream water separation membrane unit on a downstream side of the upstream water separation membrane unit is connected to a steam ejector, and a condenser for condensing water in a gas phase passing through the steam ejector condenses water and thereby separates the water.