Water treatment device

Abstract

A water treatment device (1) includes a primary unit (U1) having a plurality of primary elements (E1) as reverse osmosis membrane devices disposed in parallel to each other to separate water to be treated (SW) supplied from an upstream side into primary condensed water (CW1) and fresh water (FW1); a pump (P) which feeds the water to be treated from the upstream side of the primary unit to supply the water to be treated to the primary unit; a secondary unit (U2) having secondary elements (E2) as reverse osmosis membrane devices, the secondary elements being provided in smaller number than the primary elements and disposed in parallel to each other to separate the primary condensed water into secondary condensed water (CW2) and fresh water (FW2); and a reflux unit (2) which refluxes a part of the secondary condensed water between the primary unit and the secondary unit.

Dependencies are inferred from the claim text.