Seawater desalination system and energy exchange chamber

Abstract

A seawater desalination system which can solve a problem of wear of a sliding member and can suppress mixing of concentrated seawater and seawater by making an energy exchange chamber no-piston configuration is provided. In a seawater desalination system for producing fresh water from seawater by passing the seawater pressurized by a pump through a reverse-osmosis membrane-separation apparatus (4) to separate the seawater into fresh water and concentrated seawater, an energy exchange chamber (20) for utilizing pressure energy of the concentrated seawater discharged from the reverse-osmosis membrane-separation apparatus (3) as energy for pressurizing part of the seawater is provided. The energy exchange chamber includes a concentrated seawater port (P1) for introducing and discharging the concentrated seawater, a seawater port (P2) for introducing and discharging the seawater, and a plurality of partitioned fluid passages (R) provided in the chamber to allow the concentrated seawater port (P1) and the seawater port (P2) to communicate with each other.

Dependencies are inferred from the claim text.