Seawater desalination system and energy recovery device

• Main Author: Takahashi, Tamami
• Format: Patent
• Language: English
• Published: 14.01.2020
• Subjects: BLASTING; CHEMISTRY; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR; FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOWOF GASES OR LIQUIDS; FLUID-PRESSURE ACTUATORS; FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS; HEATING; HYDRAULICS OR PNEUMATICS IN GENERAL; LIGHTING; MEASURING; MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL; MECHANICAL ENGINEERING; METALLURGY; METERING BY VOLUME; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PHYSICS; SEPARATION; SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; TESTING; TRANSPORTING; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE; WEAPONS

An energy recovery device is provided in a seawater desalination system for desalinating seawater by removing salinity from the seawater. A pressure exchange chamber for pressurizing seawater by a pressure of concentrated seawater discharged from a reverse-osmosis membrane-separation apparatus includes a first supply and discharge port connected to a switching valve for performing supply and discharge of liquid, a second supply and discharge port connected to a directional control valve for performing supply and discharge of liquid, a flow resistor provided at the first supply and discharge port side in the chamber and configured to regulate the flow, and a flow resistor provided at the second supply and discharge port side in the chamber and configured to regulate the flow, and a flowmeter provided between the two flow resistors and configured to measure a flow rate of the liquid in the chamber.