Patent attributes
An energy recovery apparatus usable in a seawater desalination system. The energy recovery apparatus includes a plurality of chambers to pressurize the seawater by pressure energy of the concentrated seawater by supply and discharging the concentrated seawater and the seawater, a first flowmeter for integrating a flow rate of the seawater or the concentrated seawater which flows into the chamber, a second flowmeter for integrating a flow rate of the seawater or the concentrated seawater discharged from the chamber, a switching valve in each of the chambers to switch the inflow and the discharge of the concentrated seawater, and a controller to control the respective switching valves of the chambers on the basis of integrated flow rate of the chamber obtained from the flow rate of the flowmeter. The controller inputs a single input signal to the respective switching valves of the chambers to control the respective switching valves.
