Patent ID: 8147692
Filing Date: 2012-04-03
Classification: B01D,C02F,Y02A

Abstract:
1. A reverse osmosis system comprising: a fluid reservoir having feed fluid therein; a valve disposed between the fluid reservoir and a brine feed tank; said brine feed tank in fluid communication with the fluid reservoir through the valve that is open during a recharge cycle and closed during a permeate production cycle, said brine feed tank having brine feed fluid therein, said brine feed tank comprising an upper flow distribution plate and a lower flow distribution plate, said brine feed tank in fluid communication with an inlet to a pressure vessel above the upper flow distribution plate, an outlet of the pressure vessel in fluid communication with the brine feed tank below the lower flow distribution plate; a high pressure pump; said pressure vessel in fluid communication with the fluid reservoir through the high pressure pump, said pressure vessel comprising a permeate outlet and a reverse osmosis membrane, said pressure vessel having a brine outlet; said brine feed tank in fluid communication with the pressure vessel; during the permeate production cycle, said high pressure pump pumping additional feed fluid under high pressure from the fluid reservoir into the pressure vessel, said pressure vessel communicating brine fluid from the brine outlet into the brine feed tank, said brine feed tank communicating brine feed fluid into an inlet of the pressure vessel; said high pressure pump raising a pressure in the pressure vessel until an amount of permeate is produced from a permeate output of the pressure vessel.