Liquid purification or separation – Casing divided by membrane into sections having inlet – Energy recovery from treated liquid
Reexamination Certificate
2007-11-20
2007-11-20
Menon, Krishnan S. (Department: 1723)
Liquid purification or separation
Casing divided by membrane into sections having inlet
Energy recovery from treated liquid
C210S650000, C210S652000, C210S097000, C210S101000, C210S321650, C210S321760, C210S321850, C417S323000, C417S264000, C417S404000
Reexamination Certificate
active
10759753
ABSTRACT:
Improvements in product water throughput from a reverse osmosis (RO) membrane achieved by thinner feed spacers in the RO element (22), enhanced recovery (ratio of permeate to feed), pressure recovery of the retentate fluid pressure opposing the feed water pressure, and fluid pulsing of the RO element feed stream. These features are preferably combined to optimize the performance and cost per unit volume of water produced. The system of the invention preferably comprises a dual head reciprocating pump (20), an RO element (22) with a housing, and a differential pressure activated (“DPA”) valve (24). The DPA valve (24), in combination with offsetting fluid pressures on the two pump heads (28, 30), generate energy recovery. The frequency and amplitude of the reciprocating pump (20) create a pulse wave in the RO element (22) that improves permeate quality and throughput. A control system preferably monitors system parameters to optimize the reciprocating pump (20) speed and amplitude to tune the optimal frequency and amplitude required for maximum throughput and permeate quality from any given RO element (22) configuration.
REFERENCES:
patent: 1029580 (1912-06-01), Bane
patent: 1160528 (1915-11-01), Pilkington
patent: 1200165 (1916-10-01), Burgess
patent: 2473986 (1949-06-01), Booth
patent: 3222269 (1965-12-01), Stanton
patent: 3365061 (1968-01-01), Bray
patent: 3505215 (1970-04-01), Bray
patent: 3558242 (1971-01-01), Jenkyn-Thomas
patent: 3622479 (1971-11-01), Schneider
patent: 3654148 (1972-04-01), Bradley
patent: 3791768 (1974-02-01), Wanner
patent: 3825122 (1974-07-01), Taylor
patent: 4000065 (1976-12-01), Ladha et al.
patent: 4070280 (1978-01-01), Bray
patent: 4077883 (1978-03-01), Bray
patent: 4124488 (1978-11-01), Wilson
patent: 4151092 (1979-04-01), Grimm et al.
patent: 4178240 (1979-12-01), Pinkerton
patent: 4187173 (1980-02-01), Keefer
patent: 4219424 (1980-08-01), Tamura et al.
patent: 4288326 (1981-09-01), Keefer
patent: 4290873 (1981-09-01), Weaver
patent: 4306952 (1981-12-01), Jansen
patent: 4321137 (1982-03-01), Kohler
patent: 4367140 (1983-01-01), Wilson
patent: 4389311 (1983-06-01), La Freniere
patent: 4432876 (1984-02-01), Keefer
patent: 4434056 (1984-02-01), Keefer
patent: 4496443 (1985-01-01), Mack et al.
patent: 4534713 (1985-08-01), Wanner
patent: 4560455 (1985-12-01), Porta et al.
patent: RE32144 (1986-05-01), Keefer
patent: 4632754 (1986-12-01), Wood
patent: 4722263 (1988-02-01), Valentin
patent: 4724079 (1988-02-01), Sale et al.
patent: 4744877 (1988-05-01), Maddock
patent: 4756830 (1988-07-01), Fredkin
patent: 4759844 (1988-07-01), Lipschultz et al.
patent: 4761208 (1988-08-01), Gram et al.
patent: 4765807 (1988-08-01), Henriksen
patent: 4786380 (1988-11-01), van Duin et al.
patent: 4790923 (1988-12-01), Stillman
patent: 4790946 (1988-12-01), Jansen
patent: 4836924 (1989-06-01), Solomon
patent: 4861487 (1989-08-01), Fulk, Jr.
patent: RE33135 (1989-12-01), Wanner, Sr., et al.
patent: 4973408 (1990-11-01), Keefer
patent: 4976842 (1990-12-01), Fowler
patent: 5006352 (1991-04-01), Zelenak nee Zoltai et al.
patent: 5085753 (1992-02-01), Sherman
patent: 5207916 (1993-05-01), Goheen et al.
patent: 5244579 (1993-09-01), Horner et al.
patent: 5295519 (1994-03-01), Baker et al.
patent: 5306428 (1994-04-01), Tonner
patent: 5320718 (1994-06-01), Molter et al.
patent: 5324666 (1994-06-01), Siepmann et al.
patent: 5358635 (1994-10-01), Frank et al.
patent: 5480386 (1996-01-01), Brohy
patent: 5492534 (1996-02-01), Athayde et al.
patent: 5496466 (1996-03-01), Gray
patent: 5503736 (1996-04-01), Schoenmeyr
patent: 5531887 (1996-07-01), Miers
patent: 5534145 (1996-07-01), Platter et al.
patent: 5540355 (1996-07-01), Hancock et al.
patent: 5540848 (1996-07-01), Engelhard
patent: 5558762 (1996-09-01), Fife et al.
patent: 5581189 (1996-12-01), Brenn
patent: 5597482 (1997-01-01), Melyon
patent: 5647416 (1997-07-01), Desrosiers et al.
patent: 5685980 (1997-11-01), Patapoff et al.
patent: 5699669 (1997-12-01), Gebhard
patent: 5725758 (1998-03-01), Chace et al.
patent: 5795459 (1998-08-01), Sweeney
patent: 5900212 (1999-05-01), Maiden et al.
patent: 5928490 (1999-07-01), Sweeney
patent: 5958229 (1999-09-01), Filiopoulos et al.
patent: 5989396 (1999-11-01), Prasnikar et al.
patent: 6007686 (1999-12-01), Welch et al.
patent: 6017200 (2000-01-01), Childs
patent: 6017447 (2000-01-01), Wright et al.
patent: 6110424 (2000-08-01), Maiden et al.
patent: 6180014 (2001-01-01), Salama
patent: 6197189 (2001-03-01), Schwartz et al.
patent: 6203696 (2001-03-01), Pearson
patent: 6524475 (2003-02-01), Herrington et al.
patent: 6558537 (2003-05-01), Herrington et al.
patent: 6609070 (2003-08-01), Lueck
patent: 6736966 (2004-05-01), Herrington et al.
patent: 6841076 (2005-01-01), Wobben
patent: 19748997 (1999-05-01), None
patent: 0352902 (1990-01-01), None
patent: WO95/29130 (1995-11-01), None
patent: WO-9902245 (1999-01-01), None
“Steri-Pen”Internet advertisement by Hydro-Photon, www.hydro-photon.com, (May 9, 2000).
Gupta, B.B., et al., “Permeate flux enhancement by pressure and flow pulsations in microfiltration with mineral membranes”,Journal of Membrane Science 70, 70,(1992),257-266.
Venczel, L.V., “Inactivation of Cryptosporidium parvum Oocysts and Clostridium perfringens Spores by a Mixed-Oxidant Disinfectant and by Free Chlorine”,Applied and Environmental Microbiology, vol. 63, No. 4, (Apr. 1997), 1598-1601.
Hand Frank R.
Herrington Rodney E.
Askenazy Philip D.
Menon Krishnan S.
MIOX Corporation
Peacock Deborah A.
LandOfFree
Dual head pump driven filtration system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Dual head pump driven filtration system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dual head pump driven filtration system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3846094