Method for starting of desalting device by reverse-osmosis method provided with energy recovery device

Abstract

Abstract PURPOSE: To prevent the abrupt pressure rise of a system and start the system smoothly by providing a pressure control valve on the way of a pipeline connecting a high pressure pump and a reverse-osmosis membrane module, and providing a bypass valve of a diameter smaller than that of said valve in parallel with this. CONSTITUTION: A turbine inlet valve V 2 , a pressure control valve PVC and a bypass valve VB 1 are closed, and a turbine bypass valve V 3 and a flow rate control valve FCV are kept opened at about 40%. After the motor 5 of a high pressure pump 4 is started, the valve VB 1 is gradually opened, and the pressure and flow rate of the raw water flowing into a reverse-osmosis membrane module 6 are gradually increased by making use of the throttling effect of the pressure reducing orifice OB 2 provided in a turbine bypass pipeline L 6 . When the inlet pressure of the reverse-osmosis membrane module attains a prescribed value, the valve PCV is opened, and the supply pressure and flow rate of the raw water are automatically controlled by the operation of this and the valve FCV. COPYRIGHT: (C)1982,JPO&Japio

Inventors

• 👤 Yuichi Kunisada
• 👤 Junichiro Yoshioka
• 👤 Atsushi Koizumi

Bibliographic Details