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公开(公告)号：EP1140330B1
公开(公告)日：2005-04-06
申请号：EP99955620.2
申请日：1999-11-18
CPC分类号： B01D65/08 , B01D61/142 , B01D61/145 , B01D61/147 , B01D61/16 , B01D61/18 , B01D61/22 , B01D63/02 , B01D63/043 , B01D65/02 , B01D2311/04 , B01D2315/06 , B01D2321/04 , B01D2321/16 , B01D2321/185 , B01D2321/2066 , B01D2321/2083 , C02F1/444 , C02F3/1273 , Y02W10/15 , B01D2311/2649 , B01D2311/14 , B01D2311/10 , B01D2311/2661
摘要： A process for operating filtering membranes submerged in a tank involves, in one aspect, periodically deconcentrating the tank by at least partially emptying and refilling the tank with fresh water while permeation continues. In another aspect, long trains of membrane modules are placed in series along a flow path in the tank. In one embodiment, constant aeration is provided to prevent tank water from by-passing the membrane modules while proving controlled mixing such that the average concentration of solids in the tank is lower than the concentration of solids in the tank near an outlet for removing retentate from the tank. In another embodiment, the membrane modules are arranged in a series of filtration zones between a feed water inlet and a retentate outlet of a tank. Permeate is withdrawn from the filtration zones by separate means associated with each filtration zone. Tank water containing rejected solids flows in a tank flow through the filtration zones, increasing in concentration from one zone to the next. A preferred membrane module has membranes transverse to the tank flow and fills a substantial portion of each filtration zone. With either embodiment, aeration, backwashing or packing density of membranes varies between filtration zones and the flow pattern in the tank may be periodically reversed.
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公开(公告)号：EP1194217A1
公开(公告)日：2002-04-10
申请号：EP00984705.4
申请日：2000-12-06
发明人： COTE, Pierre , JANSON, Arnold , ADAMS, Nicholas
CPC分类号： B01D65/102 , G01N15/0826 , G01N2015/086
摘要： An improvement to an outside/in hollow fibre membrane filtration system includes a source of suction on the lumens of the membranes or pressure on the outside of the membranes operable without producing permeate and an air collector to collect any air that passes from the outside of the membranes to their lumens during an integrity test. A method for testing the integrety of filtering membranes involves exposing a first side of the membranes to air while a second side of the membranes remains exposed to water. A transmembrane pressure forces air through defects of concern in the membranes. Air that passes through a set of membranes is collected and its amount measured and compared to an acceptable amount of air to indicate whether there is a defect in the set of membranes. Preferably, air is collected individually from a plurality of membrane units in a filtration train and the amounts so collected compared to indicate if one of the membrane units is defective.
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公开(公告)号：EP1140330A1
公开(公告)日：2001-10-10
申请号：EP99955620.2
申请日：1999-11-18
CPC分类号： B01D65/08 , B01D61/142 , B01D61/145 , B01D61/147 , B01D61/16 , B01D61/18 , B01D61/22 , B01D63/02 , B01D63/043 , B01D65/02 , B01D2311/04 , B01D2315/06 , B01D2321/04 , B01D2321/16 , B01D2321/185 , B01D2321/2066 , B01D2321/2083 , C02F1/444 , C02F3/1273 , Y02W10/15 , B01D2311/2649 , B01D2311/14 , B01D2311/10 , B01D2311/2661
摘要： A process for operating filtering membranes submerged in a tank involves, in one aspect, periodically deconcentrating the tank by at least partially emptying and refilling the tank with fresh water while permeation continues. In another aspect, long trains of membrane modules are placed in series along a flow path in the tank. In one embodiment, constant aeration is provided to prevent tank water from by-passing the membrane modules while proving controlled mixing such that the average concentration of solids in the tank is lower than the concentration of solids in the tank near an outlet for removing retentate from the tank. In another embodiment, the membrane modules are arranged in a series of filtration zones between a feed water inlet and a retentate outlet of a tank. Permeate is withdrawn from the filtration zones by separate means associated with each filtration zone. Tank water containing rejected solids flows in a tank flow through the filtration zones, increasing in concentration from one zone to the next. A preferred membrane module has membranes transverse to the tank flow and fills a substantial portion of each filtration zone. With either embodiment, aeration, backwashing or packing density of membranes varies between filtration zones and the flow pattern in the tank may be periodically reversed.
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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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公开(公告)号：EP1194217B1
公开(公告)日：2004-06-16
申请号：EP00984705.4
申请日：2000-12-06
发明人： COTE, Pierre , JANSON, Arnold , ADAMS, Nicholas
CPC分类号： B01D65/102 , G01N15/0826 , G01N2015/086
摘要： An improvement to an outside/in hollow fibre membrane filtration system includes a source of suction on the lumens of the membranes or pressure on the outside of the membranes operable without producing permeate and an air collector to collect any air that passes from the outside of the membranes to their lumens during an integrity test. A method for testing the integrety of filtering membranes involves exposing a first side of the membranes to air while a second side of the membranes remains exposed to water. A transmembrane pressure forces air through defects of concern in the membranes. Air that passes through a set of membranes is collected and its amount measured and compared to an acceptable amount of air to indicate whether there is a defect in the set of membranes. Preferably, air is collected individually from a plurality of membrane units in a filtration train and the amounts so collected compared to indicate if one of the membrane units is defective.
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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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