SEAWATER DESALINATION SYSTEM AND ENERGY RECOVERY DEVICE

摘要

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.

主权项

1. A pressure exchange chamber for pressurizing seawater by a pressure of concentrated seawater discharged from a reverse-osmosis membrane-separation apparatus in a seawater desalination system for producing fresh water from the seawater by separating the seawater into fresh water and concentrated seawater by the reverse-osmosis membrane-separation apparatus, the pressure exchange chamber comprising:
a first supply and discharge port provided at one end of the chamber and configured to perform supply and discharge of liquid, the first supply and discharge port being connected to a switching valve which is provided outside the chamber and is configured to supply a high-pressure or low-pressure liquid; a second supply and discharge port provided at the other end of the chamber and configured to perform supply and discharge of liquid, the second supply and discharge port being connected to a directional control valve which is provided outside the chamber and is configured to supply a high-pressure or low-pressure 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.