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公开(公告)号：US20180361324A1
公开(公告)日：2018-12-20
申请号：US15992157
申请日：2018-05-29
发明人： Boris LIBERMAN , Igal LIBERMAN
摘要： Apparatus and method for semi-permeable membrane cleaning in particular, applying series of pulsed water stroke, made simultaneously with osmosis backward flow causing superposed membrane directional shaking and fouling detachment. Pulsed water stroke provided by water stroke generator as several momentum sharp changes in gauge pressure and induce velocity pulse of residual brine flow. The pulsed water strokes ideally induce resonance in the membrane. Osmosis backward wash may be provided either by injection for predetermined injection time, additional solution selected in such way that net driving pressure becomes opposite to normal osmotic operation thereby providing a backward flow of permeate towards to the side opposite to normal operation mode, so as to lift said foulant, or by throttling permeate exiting from the permeate enclosure, until the net driving pressure value become equal to zero, during application of precise synchronized and opposing brine and permeate pressure strokes thereby providing a plurality of quick RO-FO-RO process changes. These procedures allow a membrane to be kept continuously clean and operate at higher recovery.
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公开(公告)号：US20220168692A1
公开(公告)日：2022-06-02
申请号：US17589493
申请日：2022-01-31
发明人： Boris LIBERMAN , Igal LIBERMAN
摘要： Disclosed herein are apparatuses and methods for semi-permeable membrane cleaning. In particular, a pressure retarded osmosis (PRO) process redirects raw solution and fluid streams in such a way as to cause periodic changes of the process from PRO to reverse osmosis (RO) for lifting and detaching fouling. Further disclosed is applying, at least periodically, a pulsed-flow regime in the fluid stream, thereby causing increased shearing force for enhanced evacuation of the foulant. Additionally, a backward wash may be provided by injection, for a predetermined injection time, of additional solution selected in such way that net driving pressure becomes RO opposite to normal PRO operation, thereby providing a backward flow from a first side of the membrane to a second side of the membrane, so as to lift and evacuate foulant.
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公开(公告)号：US20170216776A1
公开(公告)日：2017-08-03
申请号：US15328411
申请日：2015-07-27
发明人： Boris LIBERMAN , Igal LIBERMAN
CPC分类号： B01D65/02 , B01D61/025 , B01D61/10 , B01D2313/18 , B01D2321/04 , B01D2321/06 , B01D2321/12 , B01D2321/2033 , B01D2321/2058 , B01D2321/2066 , B01D2321/2083 , C02F1/283 , C02F1/441 , C02F1/444 , C02F2103/08 , C02F2303/16
摘要： Apparatus and method for semi-permeable membrane cleaning in particular, applying series of pulsed water stroke, made simultaneously with osmosis backward flow causing superposed membrane directional shaking and fouling detachment. Pulsed water stroke provided by water stroke generator as several momentum sharp changes in gauge pressure and induce velocity pulse of residual brine flow. The pulsed water strokes ideally induce resonance in the membrane. Osmosis backward wash may be provided either by injection for predetermined injection time, additional solution selected in such way that net driving pressure becomes opposite to normal osmotic operation thereby providing a backward flow of permeate towards to the side opposite to normal operation mode, so as to lift said foulant, or by throttling permeate exiting from the permeate enclosure, until the net driving pressure value become equal to zero, during application of precise synchronized and opposing brine and permeate pressure strokes thereby providing a plurality of quick RO-FO-RO process changes. These procedures allow a membrane to be kept continuously clean and operate at higher recovery.
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公开(公告)号：US20180304205A1
公开(公告)日：2018-10-25
申请号：US16019484
申请日：2018-06-26
发明人： Boris LIBERMAN , Igal LIBERMAN
CPC分类号： B01D65/02 , B01D61/025 , B01D61/10 , B01D2313/18 , B01D2321/04 , B01D2321/06 , B01D2321/12 , B01D2321/2033 , B01D2321/2058 , B01D2321/2066 , B01D2321/2083 , C02F1/283 , C02F1/441 , C02F1/444 , C02F2103/08 , C02F2303/16 , Y02A20/131
摘要： Apparatus and method for semi-permeable membrane cleaning in particular, applying series of pulsed water stroke, made simultaneously with osmosis backward flow causing superposed membrane directional shaking and fouling detachment. Pulsed water stroke provided by water stroke generator as several momentum sharp changes in gauge pressure and induce velocity pulse of residual brine flow. The pulsed water strokes ideally induce resonance in the membrane. Osmosis backward wash may be provided either by injection for predetermined injection time, additional solution selected in such way that net driving pressure be-comes opposite to normal osmotic operation thereby providing a backward flow of permeate towards to the side opposite to normal operation mode, so as to lift said foulant, or by throttling permeate exiting from the permeate enclosure, until the net driving pressure value become equal to zero, during application of precise synchronized and opposing brine and permeate pressure strokes thereby providing a plurality of quick RO-FO-RO process changes. These procedures allow a membrane to be kept continuously clean and operate at higher recovery.
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