Reverse osmosis system with control based on flow rates in the permeate and brine streams
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B01D-061/02
B01D-061/06
B01D-061/12
C02F-001/44
C02F-103/08
출원번호
US-0348392
(2012-01-11)
등록번호
US-9808764
(2017-11-07)
발명자
/ 주소
Oklejas, Jr., Eli
출원인 / 주소
Fluid Equipment Development Company, LLC
대리인 / 주소
Harness, Dickey & Pierce, PLC
인용정보
피인용 횟수 :
0인용 특허 :
71
초록▼
A reverse osmosis system includes a membrane chamber having a feed line. The chamber generates a permeate stream and a brine stream from the feed line. A feed pump pressurizes the feed line. A first flow meter generates a first flow signal corresponding to a flow of fluid in the permeate stream. A b
A reverse osmosis system includes a membrane chamber having a feed line. The chamber generates a permeate stream and a brine stream from the feed line. A feed pump pressurizes the feed line. A first flow meter generates a first flow signal corresponding to a flow of fluid in the permeate stream. A booster device has a turbine in fluid communication with the brine stream and a pump in fluid communication with the feed line. A motor is coupled to the turbine device and a variable frequency drive is attached to the turbine device operating in response to the first flow signal. A second flow meter generates a second flow signal corresponding to a flow of fluid in the brine stream and a variable size nozzle operates an opening in response to the second flow meter.
대표청구항▼
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 porti
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; andcontrolling an opening to the turbine portion by adjusting a variable size nozzle in response to the second flow signal. 2. A method as recited in claim 1, wherein controlling the first motor comprises controlling the first motor to act as a generator when the first flow signal is above a control point to generate electrical power for the reverse osmosis system. 3. A method as recited in claim 1, wherein controlling the opening comprises decreasing a size of the opening to decrease a brine flow rate. 4. A method as recited in claim 1, wherein controlling the opening comprises increasing a size of the opening to increase a brine flow rate. 5. A method as recited in claim 1, further comprising providing a first isolation valve disposed between the feed pump and the booster device. 6. A method as recited in claim 5, further comprising providing a second isolation valve disposed between the booster device and a brine manifold. 7. A method as recited in claim 6, further comprising providing a third isolation valve in fluid communication with the permeate stream. 8. A method as recited in claim 1, wherein the first motor is an induction motor. 9. A method as recited in claim 1, wherein the variable frequency drive is a regenerative variable frequency drive. 10. A method of operating a multi-stage reverse osmosis system having a feed manifold, a permeate manifold and a plurality of reverse osmosis stages fluidically coupled to the feed manifold and the permeate manifold, wherein each stage of the multi-stage reverse osmosis system comprises a membrane chamber having a feed line, wherein said membrane chamber generates a permeate stream and a brine stream, wherein each of the stages further comprises (i) a booster device having a turbine portion in fluid communication with the brine stream, a pump portion in fluid communication with the feed line, a variable frequency drive attached to a first motor, said turbine portion, pump portion and first motor comprising a common shaft, the method comprising: pressurizing a feed stream within the feed manifold with a feed pump to form a pressurized feed stream;at each of the stages: passing the pressurized feed stream through the feed line;generating a first flow signal, in a first flow meter, corresponding to a flow of fluid in the permeate stream;operating the variable frequency drive of 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; andcontrolling an opening to the turbine portion by adjusting a variable size nozzle in response to the second flow signal. 11. A method as recited in claim 10, wherein controlling the first motor comprises controlling the first motor to act as a generator when the first flow signal is above a control point to generate power for a reverse osmosis power system from the generator. 12. A method as recited in claim 10, wherein controlling an opening comprises controlling the opening smaller to decrease a brine flow rate. 13. A method as recited in claim 10, wherein controlling an opening comprises controlling the opening larger to increase a brine flow rate. 14. A method as recited in claim 10, further comprising providing a first isolation valve disposed between the feed pump and the booster device for each stage. 15. A method as recited in claim 14, further comprising providing a second isolation valve disposed between the booster device and a brine manifold. 16. A method as recited in claim 15, further comprising providing a third isolation valve in fluid communication with the permeate stream. 17. A method as recited in claim 10, wherein operating the variable frequency drive comprises operating the variable frequency drive for an induction motor. 18. A method as recited in claim 10, wherein operating the variable frequency drive comprises operating a regenerative variable frequency drive for the first motor. 19. A method as recited in claim 1, further comprising: driving a turbine via the first motor,wherein the turbine portion comprises the turbine,the pressurizing of the feed line is performed via a first pump and includes a second motor driving the first pump, andthe pump portion comprises a second pump; anddriving the second pump via the turbine. 20. A method as recited in claim 1, wherein: the turbine portion comprises a turbine;the controlling of the first motor comprises transitioning the first motor to operate as a generator when the first flow signal is above a control point to generate electrical power for the reverse osmosis system; andthe generator is driven by rotation of the turbine. 21. A method as recited in claim 1, wherein: the turbine portion comprises a turbine; andthe second flow signal indicates an amount of fluid flow provided from the brine stream to the turbine.
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