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1.发明公开SYSTEM FOR MAINTAINING A CLEAN SKEIN OF HOLLOW FIBRES WHILE FILTERING SUSPENDED SOLIDS 审中-公开系统不断净化的中空纤维束在过滤过程中固体悬浮物
公开(公告)号：EP1053054A1
公开(公告)日：2000-11-22
申请号：EP98958129.3
申请日：1998-12-02
CPC分类号： B01D65/08 , B01D61/18 , B01D61/20 , B01D63/021 , B01D63/022 , B01D63/023 , B01D63/026 , B01D63/043 , B01D65/02 , B01D2321/02 , B01D2321/12 , B01D2321/185 , C02F1/444 , Y10S261/70
摘要： The outer surfaces of hollow fiber membranes in a skein, or a bank or cassette of stacked skeins, are kept essentially free of solids by maintaining a substantially uniform flow of a stream of coarse bubbles through each of plural orifices in an aerator disposed beneath the fibers. Aerators for skeins used in microfiltration of wastewater in a tank are periodically flushed by injecting flushing air into permeate returned to the tank over a short period. The air is injected into returning permeate for less than 1 minute, preferably less than 20 sec so as to produce discrete masses of water which are flowed laterally through the body of the aerator, cleaning its walls and maintaining the orifices essentially free from plugging.
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公开(公告)号：EP1146954A1
公开(公告)日：2001-10-24
申请号：EP00975727.9
申请日：2000-11-15
CPC分类号： B01D65/08 , B01D61/145 , B01D61/147 , B01D61/18 , B01D63/02 , B01D63/024 , B01D63/04 , B01D63/043 , B01D63/16 , B01D65/02 , B01D65/10 , B01D65/104 , B01D2313/06 , B01D2313/08 , B01D2315/04 , B01D2315/06 , B01D2317/04 , B01D2321/04 , B01D2321/12 , B01D2321/185 , C02F1/444
摘要： A filtering element has ultrafiltration or microfiltration hollow fiber membranes extending horizontally between a pair of opposed horizontally spaced, vertically extending headers. Side plates extending between the pair of vertically extending headers define a vertical flow channel through the element. Modules are created by placing the elements in place without obstructing the vertical flow channels. Each element may be released from the frame, however, and removed by sliding it in a direction substantially normal to its headers without disassembling the remainder of the module. The elements have associated releasable water tight fittings between the elements and a permeate collector, the releasable water tight fittings being releasable by removing an element from the frame. An aerator below the module has a plurality of air holes located to provide a line of air holes below each element or below a side plate between each pair of elements. In a preferred process, permeate flux is less than 50 L/m /h and preferably less than 35 L/m /h, aeration to scrub the membranes is provided during periods of time when permeation is periodically stopped and accumulated solids are removed by periodically emptying and refilling a tank containing the elements. A bubble point test is applied to each row of the module in turn, the presence of bubbles in a particular flow channel indicating which, if any, elements of a row are suitable.
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3.发明公开FRAMELESS ARRAY OF HOLLOW FIBER MEMBRANES AND METHOD OF MAINTAINING CLEAN FIBER SURFACES WHILE FILTERING A SUBSTRATE TO WITHDRAW A PERMEATE 失效中空纤维膜的方法清洁无框安排过滤液体是一个PERMEAT WIN过程中，使纤维表面。
公开(公告)号：EP0669851A1
公开(公告)日：1995-09-06
申请号：EP93924469.0
申请日：1993-11-15
发明人： COTE, Pierre, Lucien , SMITH, Bradley, Michael , DEUTSCHMANN, Ake, Adolf , RODRIGUES, Carlos, Fernando, Fernandes , PEDERSEN, Steven, Kristian
CPC分类号： B01D65/08 , B01D61/142 , B01D61/145 , B01D61/147 , B01D61/18 , B01D63/02 , B01D63/021 , B01D63/022 , B01D63/04 , B01D63/043 , B01D65/02 , B01D2321/185 , C02F3/12 , C12M29/16 , Y02W10/15
摘要： A frameless array unconfined in a modular shell, proves to be a surprisingly effective membrane device for withdrawing permeate from a substrate, the flux through the membranes reaching an essentially constant relatively high value because of the critical deployment of fibers of the array as a skein, arching in a buoyantly swayable generally parabolic configuration within the substrate, above at least one of the array's headers in which the terminal end portions of the fibers are potted. The length of each fiber must be greater than the direct center-to-center distance between the array's pair of headers. For use in a large reservoir, an assembly of the array and a gas distributor means has fibers preferably >0.5 meter long, which together provide a surface area >10 m2. The terminal end portions of fibers in each header are substantially free from fiber-to-fiber contact. When used in a tank from which the permeate is withdrawn at a location low enough to overcome the transmembrane pressure differential of the fibers, the permeate is withdrawn under a vacuum induced by gravity. To increase flux, a pump may be used which provides a suction less than 75 cm of Hg. When used in combination with a gas-distribution manifold disposed beneath the skein so as to flow bubbles through it, the surfaces of the fibers are surprisingly resistant to being fouled by build-up of deposits of inanimate particles or microorganisms in the substrate. Membranes with high transmembrane pressure differential may be used, if desired, and permeate removed with a vacuum pump.
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公开(公告)号：EP1210298A1
公开(公告)日：2002-06-05
申请号：EP00951154.4
申请日：2000-08-03
发明人： COTE, Pierre, Lucien , JANSON, Arnold, Frederic , PEDERSEN, Steven, Kristian , LOW, Steven, Ian
CPC分类号： B01D65/102 , B01D61/142 , B01D61/18 , B01D61/22 , B01D63/043 , B01D63/046 , B01D65/02 , B01D2313/125 , B01D2313/54 , B01D2315/06 , B01D2321/04 , B01D2321/16 , B01D2321/2066 , C02F1/444
摘要： Limitation of the number of cassettes in an assembly currently used for the production of permeate is obviated by grouping plural cassettes into racks one or more of which may be isolated while permeate production from the remaining racks is uninterrupted. Ancillary functions such as back-pulsing, chemical cleaning and testing for defects in membranes ('integrity testing') in one or more racks may proceed while production of permeate continues. The number of racks in a bank is determined by the period of the overall filtration cycle, typically 15 min, in which filtration period the ancillary period is a minor portion, typically 30 sec. The racks make it possible to use automatic on/off valves which open and close quicker than larger ones. The resulting saving in time, energy, and equipment costs, which when back-pulsing with permeate is surprisingly economical, is even greater when a chemical cleaning solution is to be used. In addition, the saving in cost of equipment and avoiding the wear and tear of pumps which are intermittently stopped and started, produces unexpected economic benefits. For even greater savings in operating costs, a bank of cassettes, or a bank of racks may be operated with a 'gravity flow' system.
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公开(公告)号：EP1210298B1
公开(公告)日：2003-04-02
申请号：EP00951154.4
申请日：2000-08-03
发明人： COTE, Pierre, Lucien , JANSON, Arnold, Frederic , PEDERSEN, Steven, Kristian , LOW, Steven, Ian
CPC分类号： B01D65/102 , B01D61/142 , B01D61/18 , B01D61/22 , B01D63/043 , B01D63/046 , B01D65/02 , B01D2313/125 , B01D2313/54 , B01D2315/06 , B01D2321/04 , B01D2321/16 , B01D2321/2066 , C02F1/444
摘要： Limitation of the number of cassettes in an assembly currently used for the production of permeate is obviated by grouping plural cassettes into racks one or more of which may be isolated while permeate production from the remaining racks is uninterrupted. Ancillary functions such as back-pulsing, chemical cleaning and testing for defects in membranes ('integrity testing') in one or more racks may proceed while production of permeate continues. The number of racks in a bank is determined by the period of the overall filtration cycle, typically 15 min, in which filtration period the ancillary period is a minor portion, typically 30 sec. The racks make it possible to use automatic on/off valves which open and close quicker than larger ones. The resulting saving in time, energy, and equipment costs, which when back-pulsing with permeate is surprisingly economical, is even greater when a chemical cleaning solution is to be used. In addition, the saving in cost of equipment and avoiding the wear and tear of pumps which are intermittently stopped and started, produces unexpected economic benefits. For even greater savings in operating costs, a bank of cassettes, or a bank of racks may be operated with a 'gravity flow' system.
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6.发明公开VERTICAL SKEIN OF HOLLOW FIBER MEMBRANES AND METHOD OF MAINTAINING CLEAN FIBER SURFACES 无效中空纤维膜的垂直链和方法用于维持清洁纤维表面
公开(公告)号：EP0846023A2
公开(公告)日：1998-06-10
申请号：EP96926288.0
申请日：1996-08-08
发明人： MAHENDRAN, Mailvaganam , PEDERSEN, Steven, Kristian , HENSHAW, Wayne, Jerald , BEHMANN, Henry , RODRIGUES, Carlos, Fernando, F.
CPC分类号： B01D65/08 , B01D61/18 , B01D61/20 , B01D63/02 , B01D63/021 , B01D63/022 , B01D63/023 , B01D63/026 , B01D63/027 , B01D63/04 , B01D63/043 , B01D65/02 , B01D2315/06 , B01D2321/04 , B01D2321/12 , B01D2321/185 , B01D2321/2066 , C02F1/444 , C02F3/1273 , Y02W10/15 , Y10S264/48
摘要： A vertical skein of 'fibers', opposed terminal portions of which are held in headers unconfined in a modular shell, is aerated with a gas-distribution means which produces a mass of bubbles serving the function of a scrub-brush for the outer surfaces of the fibers. The membrane device is surprisingly effective with relatively little cleansing gas, the flux through the membranes reaching an essentially constant relatively high value because the vertical deployment of fibers allows bubbles to rise upwards along the outer surfaces of the fibers. Further, bubbles flowing along the outer surfaces of the fibers make the fibers surprisingly resistant to being fouled by build-up of deposits of inanimate particles or microorganisms in the substrate provided that the length of each fiber is only slightly greater than the direct center-to-center distance between opposed faces of the headers, preferably in the range from at least 0.1 % to about 5 % greater. For use in a large reservoir, a bank of skeins is used with a gas distributor means; each skein has fibers preferably > 0.5 meter long, which together provide a surface area > 10 m2. The terminal end portions of fibers in each novel header are kept free from fiber-to-fiber contact with a novel method of potting fibers.
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公开(公告)号：EP1146955B1
公开(公告)日：2005-01-12
申请号：EP00975724.6
申请日：2000-11-15
CPC分类号： B01D65/08 , B01D61/145 , B01D61/147 , B01D61/18 , B01D63/02 , B01D63/024 , B01D63/04 , B01D63/043 , B01D63/16 , B01D65/02 , B01D65/10 , B01D65/104 , B01D2313/06 , B01D2313/08 , B01D2315/04 , B01D2315/06 , B01D2317/04 , B01D2321/04 , B01D2321/12 , B01D2321/185 , C02F1/444
摘要： A filtering element has ultrafiltration or microfiltration hollow fiber membranes extending horizontally between a pair of opposed horizontally spaced, vertically extending headers. Side plates extending between the pair of vertically extending headers define a vertical flow channel through the element. Modules are created by placing the elements in place without obstructing the vertical flow channels. Each element may be released from the frame, however, and removed by sliding it in a direction substantially normal to its headers without disassembling the remainder of the module. The elements have associated releasable water tight fittings between the elements and a permeate collector, the releasable water tight fittings being releasable by removing an element from the frame. An aerator below the module has a plurality of air holes located to provide a line of air holes below each element or below a side plate between each pair of elements. In a preferred process, permeate flux is less than 50 L/m /h and preferably less than 35 L/m /h, aeration to scrub the membranes is provided during periods of time when permeation is periodically stopped and accumulated solids are removed by periodically emptying and refilling a tank containing the elements. A bubble point test is applied to each row of the module in turn, the presence of bubbles in a particular flow channel indicating which, if any, elements of a row are suitable.
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8.发明授权VERTICAL SKEIN OF HOLLOW FIBER MEMBRANES AND METHOD OF MAINTAINING CLEAN FIBER SURFACES 无效中空纤维膜的垂直链和方法用于维持清洁纤维表面
公开(公告)号：EP0846023B1
公开(公告)日：2002-10-23
申请号：EP96926288.0
申请日：1996-08-08
发明人： MAHENDRAN, Mailvaganam , PEDERSEN, Steven, Kristian , HENSHAW, Wayne, Jerald , BEHMANN, Henry , RODRIGUES, Carlos, Fernando, F.
IPC分类号： B01D63/02
CPC分类号： B01D65/08 , B01D61/18 , B01D61/20 , B01D63/02 , B01D63/021 , B01D63/022 , B01D63/023 , B01D63/026 , B01D63/027 , B01D63/04 , B01D63/043 , B01D65/02 , B01D2315/06 , B01D2321/04 , B01D2321/12 , B01D2321/185 , B01D2321/2066 , C02F1/444 , C02F3/1273 , Y02W10/15 , Y10S264/48
摘要： A vertical skein of 'fibers', opposed terminal portions of which are held in headers unconfined in a modular shell, is aerated with a gas-distribution means which produces a mass of bubbles serving the function of a scrub-brush for the outer surfaces of the fibers. The membrane device is surprisingly effective with relatively little cleansing gas, the flux through the membranes reaching an essentially constant relatively high value because the vertical deployment of fibers allows bubbles to rise upwards along the outer surfaces of the fibers. Further, bubbles flowing along the outer surfaces of the fibers make the fibers surprisingly resistant to being fouled by build-up of deposits of inanimate particles or microorganisms in the substrate provided that the length of each fiber is only slightly greater than the direct center-to-center distance between opposed faces of the headers, preferably in the range from at least 0.1 % to about 5 % greater. For use in a large reservoir, a bank of skeins is used with a gas distributor means; each skein has fibers preferably > 0.5 meter long, which together provide a surface area > 10 m2. The terminal end portions of fibers in each novel header are kept free from fiber-to-fiber contact with a novel method of potting fibers.
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公开(公告)号：EP1146955A1
公开(公告)日：2001-10-24
申请号：EP00975724.6
申请日：2000-11-15
CPC分类号： B01D65/08 , B01D61/145 , B01D61/147 , B01D61/18 , B01D63/02 , B01D63/024 , B01D63/04 , B01D63/043 , B01D63/16 , B01D65/02 , B01D65/10 , B01D65/104 , B01D2313/06 , B01D2313/08 , B01D2315/04 , B01D2315/06 , B01D2317/04 , B01D2321/04 , B01D2321/12 , B01D2321/185 , C02F1/444
摘要： A filtering element has ultrafiltration or microfiltration hollow fiber membranes extending horizontally between a pair of opposed horizontally spaced, vertically extending headers. Side plates extending between the pair of vertically extending headers define a vertical flow channel through the element. Modules are created by placing the elements in place without obstructing the vertical flow channels. Each element may be released from the frame, however, and removed by sliding it in a direction substantially normal to its headers without disassembling the remainder of the module. The elements have associated releasable water tight fittings between the elements and a permeate collector, the releasable water tight fittings being releasable by removing an element from the frame. An aerator below the module has a plurality of air holes located to provide a line of air holes below each element or below a side plate between each pair of elements. In a preferred process, permeate flux is less than 50 L/m /h and preferably less than 35 L/m /h, aeration to scrub the membranes is provided during periods of time when permeation is periodically stopped and accumulated solids are removed by periodically emptying and refilling a tank containing the elements. A bubble point test is applied to each row of the module in turn, the presence of bubbles in a particular flow channel indicating which, if any, elements of a row are suitable.
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10.发明授权FRAMELESS ARRAY OF HOLLOW FIBER MEMBRANES AND METHOD OF MAINTAINING CLEAN FIBER SURFACES WHILE FILTERING A SUBSTRATE TO WITHDRAW A PERMEATE 失效成为清洁保持纤维表面过滤液体在中空纤维膜和方法，无框安排赢得了PERMEAT
公开(公告)号：EP0669851B1
公开(公告)日：1999-03-17
申请号：EP93924469.5
申请日：1993-11-15
发明人： COTE,Pierre,Lucien Centre de Recherche ... , SMITH, Bradley, Michael , DEUTSCHMANN, Ake, Adolf , RODRIGUES, Carlos, Fernando, Fernandes , PEDERSEN, Steven, Kristian
CPC分类号： B01D65/08 , B01D61/142 , B01D61/145 , B01D61/147 , B01D61/18 , B01D63/02 , B01D63/021 , B01D63/022 , B01D63/04 , B01D63/043 , B01D65/02 , B01D2321/185 , C02F3/12 , C12M29/16 , Y02W10/15
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