Patent ID: 6508937
Filing Date: 2003-01-21
Classification: B01D,C02F,Y02A

Abstract:
A fresh water generator comprising:a fresh water generating cartridge, including a reverse osmosis membrane, for desalinating a target liquid having a prescribed pressure of at least 0.3 kgf/cm2 and not more than 3 kgf/cm2; a pretreater provided in the preceding stage to said fresh water generating cartridge for removing residual chlorine contained in said target liquid; a feed system for feeding said target liquid at the prescribed pressure to said pretreater without step-up means for stepping up the pressure of said target liquid; a bypass path provided to bypass said pretreater; opening/closing means for open and closing said bypass path; a permeated liquid outlet path out a permeated liquid obtained from said fresh water generating cartridge; a permeated liquid discharge path discharging said permeated liquid; and a flushing means for flushing said reverse osmosis membrane of said fresh water generating cartridge; wherein said reverse osmosis membrane has a permeate flux of at least 0.1 m3/m2Â·dayÂ·kgf/cm2 and a rejection performance of at least 95% for an NaCl aqueous solution of 0.05% in concentration.