Toray Industries, Inc.

Tomohiro Maeda

Kazunori Tomioka

Masahide Taniguchi

Daishi Tateoka

Kenji Saito

According to the present invention, since a pretreatment mechanism can be operated while inhibiting the pretreated water from fluctuating in pressure, a fresh-water production apparatus is obtained in which the desalting mechanism can be stably operated. Furthermore, the period of water supply or flushing in the step of washing the pretreatment mechanism can be shortened, and the load on the lines where washing is not being performed is hence reduced. Consequently, a fresh-water production apparatus is obtained in which the pretreatment mechanism can be operated while inhibiting the pretreatment membranes from being fouled.

Fresh water production device and method for operating fresh water production device

A membrane separation device includes a separation membrane unit A that has a separation membrane unit component, feed stream side lines F1 and F2, and a permeate stream line P, and a unit for feeding a stream-to-be-treated, wherein a stream-to-be-treated sealing material is provided in the perimeter of an anti-telescoping plate of the separation membrane element, wherein the separation membrane elements can be moved within a cylindrical pressure vessel substantially in either direction, wherein the separation membrane unit is configured to feed the stream-to-be-treated through one of the feed stream side lines F1 and F2 and to discharge the concentrate stream through the other of the feed stream side lines, and wherein the separation membrane unit includes a mechanism that can switch the flow between the feed stream side lines.

Membrane separation device and operation method for membrane separation device

A fresh water generation method by which product water satisfying target water quality can be stably and efficiently obtained even when raw water quality fluctuates, is provided by branching at least a part of a water flow line through which raw waterflows into a plurality of branch lines including a branch line A1 and a branch line A2 and differentiating retention times from branching to joining together between the branch line A1 and the branch line A2, in a fresh water generation method for obtaining product water by treating raw water

Growing community of inventors

Otsu, Japan

Tomohiro Maeda