Mitsubishi Heavy Industries Limited

Kyoeisha Chemical Co., Ltd.

Arisawa Mfg., Ltd.

Takayoshi Hori

Kenji Tanaka

Yoshiaki Ito

Katsunori Matsui

Kazuhisa Takeuchi

Hiroshi Tanaka

Yoshinori Nonaka

Nozomu Kawasetsu

Kiichi Tokunaga

Yuichi Kawai

Hideo Iwahashi

Ryo Kamito

Takahiro Iiyoshi

Yoshihisa Katsunishi

Takahiro Masui

Atsuyoshi Ueda

Hidemi Sawada

Sho Yokogawa

A desalination performance restoration agent for a cellulose acetate membrane contains: a solvent; and a modified polyvinyl alcohol mixed in the solvent. The modified polyvinyl alcohol has an acetyl group structure in at least part of polyvinyl alcohol.

Desalination performance restoration agent for cellulose acetate membrane and desalination performance restoration method for cellulose acetate membrane

A highly practical tube body for a pressure transducer is provided which has excellent pressure resistance, corrosion resistance, and tensile strength; which can be manufactured at low cost in comparison with cases of using stainless steel; and which makes it possible to keep inside diameter precision high. In this tube body for a pressure transducer, the pressure applied to the interior is varied periodically, and a seal layer () is provided to the internal peripheral surface of a tube body () made of a fiber-reinforced resin composed of fibers wound in layers.

Tube body for pressure transducer

A high-pressure pump Pthat increases the pressure of raw water, a high-pressure reverse osmosis device including a high-pressure reverse osmosis membrane for concentrating a salt content in high-pressure feed water, a first drain valve mounted on a permeated water line for supplying the permeated water downstream and temporarily draining permeated water of an initial start-up from a discharge line, a low-pressure pump that is mounted on a permeated water line provided downstream of the first drain valve and reduces the pressure of the permeated water, a low-pressure reverse osmosis device including a low-pressure reverse osmosis membrane for concentrating a salt content in low-pressure feed water, and a second drain valve mounted on a discharge line at the concentrated water side of the low-pressure reverse osmosis device that temporarily discharges the low-pressure feed water of the initial start-up supplied to the low-pressure reverse osmosis device.

Multi-stage seawater desalination apparatus and operation control method of multi-stage seawater desalination apparatus

Growing community of inventors

Nagasaki, Japan

Takayoshi Hori