Pulsation energy recovery device suitable for reverse osmosis or nanofiltration membrane filtration system

Abstract

The invention discloses a pulse energy recovery device suitable for a reverse osmosis or nanofiltration membrane filtration system. The pulse energy recovery device comprises a water feeding pump, a security filter, a high-pressure pump, a reverse osmosis membrane or nanofiltration membrane, a circulating pump, an energy storage tank assembly, a pulse generation unit and an electric control system, the working medium is seawater, reverse osmosis concentrated water, and other high-concentration saline water or solution. The device is applied to the fields of seawater desalination, high-concentration salt wastewater, power plant zero discharge and reverse osmosis concentrated water treatment, a high-pressure pump is adopted to pressurize a working medium, and a reverse osmosis membrane or a nanofiltration membrane is utilized to realize seawater desalination, high-concentration salt water purification or material separation and concentration in a high-pressure state. The combination of the energy storage tank assembly and the pulse generation unit realizes the recovery of pressure energy on the high-pressure side of the membrane filtration system. A periodic pulsation traveling wave filtering mode is adopted, energy consumption in the system operation process is reduced, the system operation efficiency is improved, and the operation cost is reduced.