WATER PROCESSING DEVICE

摘要

Disclosed is a water processing device which improves and stabilises treatment performance of a reverse osmosis membrane housed in a container. In the water processing device (10), a pipe (42) is attached at the outer peripheral surface (24A) of a container (24). The flow of sea water from an outlet (46) of the pipe (42) is changed to a rotational flow by a guide path (48) such that the vertical component of motion of the sea water in relation to an inlet face (28A) of a reverse osmosis membrane (28) is temporarily eliminated. The sea water then flows rotationally along the inner peripheral surface (24B) of the container (24) in an axial direction. During this period, the axial component of the flowrate of the sea water flowing in an axial direction becomes generally equal over the entire area of an inlet face (28A) of the reverse osmosis membrane (28). As a consequence, the sea water is sufficiently exposed over the whole of the reverse osmosis membrane (28), efficiently exposing the whole face of the reverse osmosis membrane (28) to the sea water, thereby improving treatment performance of the reverse osmosis membrane (28).