US 9,808,764 B2
Reverse osmosis system with control based on flow rates in the permeate and brine streams
Eli Oklejas, Jr., Newport, MI (US)
Assigned to Fluid Equipment Development Company, LLC, Monroe, MI (US)
Filed by Eli Oklejas, Jr., Newport, MI (US)
Filed on Jan. 11, 2012, as Appl. No. 13/348,392.
Application 13/348,392 is a division of application No. 11/811,622, filed on Jun. 11, 2007, granted, now 8,128,821.
Claims priority of provisional application 60/813,764, filed on Jun. 14, 2006.
Prior Publication US 2012/0138536 A1, Jun. 7, 2012
Int. Cl. B01D 61/02 (2006.01); B01D 61/06 (2006.01); B01D 61/12 (2006.01); C02F 1/44 (2006.01); C02F 103/08 (2006.01)
CPC B01D 61/025 (2013.01) [B01D 61/022 (2013.01); B01D 61/06 (2013.01); B01D 61/12 (2013.01); C02F 1/441 (2013.01); B01D 2313/243 (2013.01); B01D 2317/04 (2013.01); C02F 2103/08 (2013.01); C02F 2209/005 (2013.01); C02F 2209/40 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A method of operating a reverse osmosis system, wherein the reverse osmosis system comprises (i) a membrane chamber having a feed line and generating a permeate stream and a brine stream, and (ii) a booster device having a turbine portion in fluid communication with the brine stream, a pump portion in fluid communication with the feed line, and a first motor coupled to the turbine portion using a common shaft between the turbine portion, pump portion, and first motor, the method comprising:
pressurizing the feed line using a feed pump;
generating a first flow signal, via a first flow meter, corresponding to a flow of fluid in the permeate stream;
operating a variable frequency drive attached to the first motor in response to the first flow signal;
controlling the first motor in response to the variable frequency drive;
generating a second flow signal, via a second flow meter, corresponding to a flow of fluid in the brine stream; and
controlling an opening to the turbine portion by adjusting a variable size nozzle in response to the second flow signal.