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公开(公告)号：US20060261007A1
公开(公告)日：2006-11-23
申请号：US10572893
申请日：2004-09-15
申请人： Fufang Zha , Huw Lazaredes , Zhiyi Cao
发明人： Fufang Zha , Huw Lazaredes , Zhiyi Cao
IPC分类号： B01D65/02
CPC分类号： B01D65/02 , B01D63/02 , B01D63/04 , B01D2313/105 , B01D2313/125 , B01D2313/24 , B01D2315/06 , B01D2321/04 , B01D2321/185
摘要： A method and apparatus for backwashing a membrane filtration system wherein permeate remaining present in the filtration system wherein permeate remaining present in the filtration system when the filtration process is stopped or suspended is used to provide liquid for backwashing the membrane pores during a backwashing process.
摘要翻译： 一种用于反冲洗膜过滤系统的方法和装置，其中在过滤系统中保留的渗透物，其中当过滤过程停止或悬浮时，过滤系统中剩余的渗透物被用于提供用于在反冲洗过程中反洗膜孔的液体。
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公开(公告)号：US20070007205A1
公开(公告)日：2007-01-11
申请号：US10569565
申请日：2004-08-27
申请人： Warren Johnson , Thomas Beck , Fufang Zha , Huw Lazaredes , Zhiyi Cao
发明人： Warren Johnson , Thomas Beck , Fufang Zha , Huw Lazaredes , Zhiyi Cao
IPC分类号： B01D65/02
CPC分类号： B01D65/08 , B01D61/14 , B01D63/02 , B01D2321/185
摘要： A method of backwashing a membrane filtration module (4), said module (4) including one or more membranes (5) located in a feed-containing vessel (3), the membranes (5) having a permeable wall which is subjected to a filtration operation wherein feed containing contaminant matter is applied to one side of the membrane wall and filtrate is withdrawn from the other side of the membrane wall, the method including: removing liquid from the feed-containing vessel (3) until the level of liquid in the feed-containing vessel (3) falls to a first level (L2) below an upper level of the membranes; suspending the filtration operation; performing a liquid backwash of the membrane wall until liquid level within the feed-containing vessel (3) rises to a second predetermined level (L1) above said first level; aerating the membrane surface with gas bubbles to dislodge fouling materials therefrom; performing a sweep or drain down of the feed-containing vessel (3) to remove the liquid containing the dislodged contaminant matter; and recommencing the filtration operation.
摘要翻译： 一种反洗膜过滤模块（4）的方法，所述模块（4）包括位于含进料容器（3）中的一个或多个膜（5），所述膜（5）具有可渗透壁，所述膜 过滤操作，其中将含有污染物质的进料施加到膜壁的一侧，并且滤液从膜壁的另一侧排出，该方法包括：从含进料的容器（3）中除去液体，直到液体的液面 含饲料容器（3）在膜的上部水平面下降到第一水平（L 2）; 暂停过滤操作; 执行膜壁的液体反冲洗，直到含饲料容器（3）内的液面上升到高于所述第一水平的第二预定水平（L 1） 用气泡对膜表面进行充气以从其中去除污垢物质; 进行含有进料的容器（3）的扫掠或排出以除去含有移出的污染物质的液体; 并重新进行过滤操作。
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公开(公告)号：US08268176B2
公开(公告)日：2012-09-18
申请号：US10569565
申请日：2004-08-27
IPC分类号： B01D65/02
CPC分类号： B01D65/08 , B01D61/14 , B01D63/02 , B01D2321/185
摘要： A method of backwashing a membrane filtration module (4), said module (4) including one or more membranes (5) located in a feed-containing vessel (3), the membranes (5) having a permeable wall which is subjected to a filtration operation wherein feed containing contaminant matter is applied to one side of the membrane wall and filtrate is withdrawn from the other side of the membrane wall, the method including: removing liquid from the feed-containing vessel (3) until the level of liquid in the feed-containing vessel (3) falls to a first level (L2) below an upper level of the membranes; suspending the filtration operation; performing a liquid backwash of the membrane wall until liquid level within the feed-containing vessel (3) rises to a second predetermined level (L1) above said first level; aerating the membrane surface with gas bubbles to dislodge fouling materials therefrom; performing a sweep or drain down of the feed-containing vessel (3) to remove the liquid containing the dislodged contaminant matter; and recommencing the filtration operation.
摘要翻译： 一种反洗膜过滤模块（4）的方法，所述模块（4）包括位于含进料容器（3）中的一个或多个膜（5），所述膜（5）具有可渗透壁，所述膜 过滤操作，其中将含有污染物质的进料施加到膜壁的一侧，并且滤液从膜壁的另一侧排出，该方法包括：从含进料的容器（3）中除去液体，直到液体的液面 含饲料容器（3）在膜的上层下方落入第一水平（L2）; 暂停过滤操作; 进行所述膜壁的液体反冲洗，直到所述含饲料容器（3）内的液面上升到高于所述第一水平的第二预定水平（L1） 用气泡对膜表面进行充气以从其中去除污垢物质; 进行含有进料的容器（3）的扫掠或排出以除去含有移出的污染物质的液体; 并重新进行过滤操作。
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公开(公告)号：US20100200503A1
公开(公告)日：2010-08-12
申请号：US12666640
申请日：2008-06-25
申请人： Fufang Zha , Zhiyi Cao
发明人： Fufang Zha , Zhiyi Cao
IPC分类号： B01D65/02
CPC分类号： B01D65/02 , B01D2321/02 , B01D2321/185 , C02F1/444 , C02F2303/16
摘要： A method of cleaning a permeable, hollow membrane (6) in an arrangement of the type wherein a pressure differential is applied across the wall of the permeable, hollow membrane (6) immersed in a liquid suspension provided in a vessel (5), said liquid suspension being applied to the outer surface of the permeable hollow membrane (6) to induce and sustain filtration through the membrane wall. The method of cleaning comprising the steps of: suspending the filtration process; while continuing to supply the liquid suspension to the vessel (5); aerating the membrane (6) by flowing gas into the vessel (5) to produce a flow of gas bubbles around the membrane (6) to dislodge at least some of the retained particulate material from the membrane surface; removing liquid containing dislodged particulate material from the vessel (5) during the aerating step and recommencing the filtration process.
摘要翻译： 一种以这种类型的布置清洁可渗透的中空膜（6）的方法，其中在穿过设置在容器（5）中的液体悬浮液中的可渗透中空膜（6）的壁上施加压力差，所述方法包括： 液体悬浮液被施加到可渗透中空膜（6）的外表面以诱导和维持通过膜壁的过滤。 清洗方法包括以下步骤：暂停过滤过程; 同时继续向容器（5）供应液体悬浮液; 通过使气体流入容器（5）中来使膜（6）充气以在膜（6）周围产生气泡流，以从膜表面移除至少一些保留的颗粒材料; 在充气步骤期间从容器（5）中除去含有脱落的颗粒物质的液体，并重新开始过滤过程。
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公开(公告)号：US20110139715A1
公开(公告)日：2011-06-16
申请号：US13059283
申请日：2009-08-17
申请人： Fufang Zha , Zhiyi Cao
发明人： Fufang Zha , Zhiyi Cao
IPC分类号： B01D65/02
CPC分类号： B01D65/02 , B01D61/22 , B01D2315/06 , B01D2321/04 , B01D2321/18 , C02F1/44 , C02F2303/16
摘要： A method of backwashing a membrane filtration system comprising at least one permeable membrane, preferably a hollow fibre membrane, the method comprising the step of applying a pressurised gas at a variable pressure to permeate remaining present in the system when filtration process is stopped or suspended to provide liquid for backwashing pores of the permeable membrane during a backwashing process. Also provided are methods of filtering solids from a liquid suspension using alternating liquid backwash pressures.
摘要翻译： 一种反冲洗膜过滤系统的方法，所述膜过滤系统包括至少一个可渗透膜，优选中空纤维膜，所述方法包括以下步骤：当过滤过程停止或暂停时，将可变压力的加压气体施加到系统中剩余的渗透物 在回洗过程中提供用于可渗透膜的反冲洗孔的液体。 还提供了使用交替的液体反冲洗压力从液体悬浮液过滤固体的方法。
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公开(公告)号：US20080203017A1
公开(公告)日：2008-08-28
申请号：US11912859
申请日：2006-04-28
申请人： Fufang Zha , Zhiyi Cao
发明人： Fufang Zha , Zhiyi Cao
IPC分类号： B01D65/02
CPC分类号： B01D65/02 , B01D61/22 , B01D2321/04 , B01D2321/16 , C02F1/444 , C02F2303/16
摘要： A method of cleaning a porous polymeric membrane having a feed side and a permeate side including the steps of introducing a fluid containing a cleaning agent to the permeate side of a membrane allowing the cleaning agent to contact the permeate side of the membrane for a predetermined time, and contact the pores of the membrane, or introducing a fluid containing a cleaning agent to the feed side of a membrane; applying a transmembrane pressure to force the fluid containing the cleaning agent from the feed side to the permeate side of the membrane; allowing the cleaning agent to contact the permeate side of the membrane for a predetermined time, and contact the pores of the membrane. Preferably a concentration gradient between the feed side fluid and the lumen side fluid containing the cleaning agent causes cleaning agent to diffuse into the feed side fluid. Pressure may be applied to the fluid containing a cleaning agent to dislodge, where present, dissolved and undissolved solid from the membrane pores. The pressure may be applied in a pulsed fashion, and can be by way of compressed air at a pressure not more than the membrane's bubble point. The methods of the present invention may be preceded by, or followed with a backwash.
摘要翻译： 一种清洁具有进料侧和渗透侧的多孔聚合物膜的方法，包括以下步骤：将含有清洁剂的流体引入到膜的渗透侧，使得清洁剂接触膜的渗透侧预定时间 并接触膜的孔，或者将含有清洗剂的流体引入膜的进料侧; 施加跨膜压力以将含有清洁剂的流体从进料侧迫使到膜的渗透侧; 允许清洁剂与膜的渗透侧接触预定时间，并与膜的孔接触。 优选地，进料侧流体和含有清洁剂的内腔侧流体之间的浓度梯度导致清洁剂扩散到进料侧流体中。 可以将压力施加到含有清洁剂的流体上，从而从膜孔排出溶解的和未溶解的固体。 压力可以以脉冲方式施加，并且可以以不超过膜的起泡点的压力通过压缩空气。 本发明的方法可以在反洗之前或之后进行。
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公开(公告)号：US08652331B2
公开(公告)日：2014-02-18
申请号：US13059283
申请日：2009-08-17
申请人： Fufang Zha , Zhiyi Cao
发明人： Fufang Zha , Zhiyi Cao
CPC分类号： B01D65/02 , B01D61/22 , B01D2315/06 , B01D2321/04 , B01D2321/18 , C02F1/44 , C02F2303/16
摘要： A method of backwashing a membrane filtration system comprising at least one permeable membrane, preferably a hollow fiber membrane, the method comprising the step of applying a pressurized gas at a variable pressure to permeate remaining present in the system when filtration process is stopped or suspended to provide liquid for backwashing pores of the permeable membrane during a backwashing process. Also provided are methods of filtering solids from a liquid suspension using alternating liquid backwash pressures.
摘要翻译： 一种反冲洗膜过滤系统的方法，所述膜过滤系统包括至少一个可渗透膜，优选中空纤维膜，所述方法包括以下步骤：当过滤过程停止或暂停时，将可变压力的加压气体施加到系统中剩余的渗透物 在回洗过程中提供用于可渗透膜的反冲洗孔的液体。 还提供了使用交替的液体反冲洗压力从液体悬浮液过滤固体的方法。
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公开(公告)号：US20090255873A1
公开(公告)日：2009-10-15
申请号：US12439209
申请日：2007-08-30
CPC分类号： B01D65/02 , B01D2311/14 , B01D2313/24 , B01D2321/04 , B01D2321/12 , B01D2321/2066 , C02F1/44 , C02F2303/16
摘要： A method of backwashing a membrane filtration system comprising at least one permeable hollow membrane, the method comprising the step of applying a low-pressure gas to the permeate remaining present in the system when the filtration process is stopped or suspended to provide liquid for backwashing the pores of the membrane during a backwashing process.
摘要翻译： 一种反冲洗包括至少一个可渗透中空膜的膜过滤系统的方法，所述方法包括当过滤过程停止或悬浮以提供用于反洗的液体时，将低压气体施加到系统中剩余的渗透物中的步骤 在反冲洗过程中膜的孔。
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公开(公告)号：US09675938B2
公开(公告)日：2017-06-13
申请号：US11912859
申请日：2006-04-28
申请人： Fufang Zha , Zhiyi Cao
发明人： Fufang Zha , Zhiyi Cao
CPC分类号： B01D65/02 , B01D61/22 , B01D2321/04 , B01D2321/16 , C02F1/444 , C02F2303/16
摘要： A method of cleaning a porous polymeric membrane having a feed side and a permeate side including the steps of introducing a fluid containing a cleaning agent to the permeate side of a membrane allowing the cleaning agent to contact the permeate side of the membrane for a predetermined time, and contact the pores of the membrane, or introducing a fluid containing a cleaning agent to the feed side of a membrane; applying a transmembrane pressure to force the fluid containing the cleaning agent from the feed side to the permeate side of the membrane; allowing the cleaning agent to contact the permeate side of the membrane for a predetermined time, and contact the pores of the membrane. Preferably a concentration gradient between the feed side fluid and the lumen side fluid containing the cleaning agent causes cleaning agent to diffuse into the feed side fluid. Pressure may be applied to the fluid containing a cleaning agent to dislodge, where present, dissolved and undissolved solid from the membrane pores. The pressure may be applied in a pulsed fashion, and can be by way of compressed air at a pressure not more than the membrane's bubble point. The methods of the present invention may be preceded by, or followed with a backwash.
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公开(公告)号：US08790515B2
公开(公告)日：2014-07-29
申请号：US11574819
申请日：2005-09-07
申请人： Fufang Zha , Zhiyi Cao
发明人： Fufang Zha , Zhiyi Cao
CPC分类号： B01D65/02 , B01D63/02 , B01D2315/06 , B01D2321/04 , B01D2321/185
摘要： A method of filtering solids from a liquid suspension comprising providing a pressure differential across the walls of permeable, hollow membranes (5) immersed in the liquid suspension contained in a vessel (8), the liquid suspension being applied to the outer surface of the porous hollow membrane (5) to induce and sustain filtration through the membrane walls. Some of the liquid suspension passes through the walls of the membranes (5) to be drawn off as permeate from the hollow membrane lumens, and at least some of the solids are retained on or in the hollow membranes or otherwise as suspended solids within the liquid surrounding the membranes (5). The method includes the steps of suspending the flow of the liquid suspension to the vessel (8); reducing the volume of liquid suspension within the vessel (8); suspending the filtration process; cleaning the membranes (5) by dislodging at least some of the solids retained on or in the membranes (5); and removing the liquid containing dislodged solids from the vessel (8).
摘要翻译： 一种从液体悬浮液中过滤固体的方法，包括提供穿过容纳在容器（8）中的液体悬浮液中的可透过的中空膜（5）的壁上的压差，所述液体悬浮液被施加到多孔 中空膜（5）以通过膜壁诱导并维持过滤。 一些液体悬浮液通过膜（5）的壁，作为渗透物从中空膜腔排出，并且至少一些固体保留在中空膜上或其中，作为悬浮固体在液体内 围绕膜（5）。 该方法包括将液体悬浮液的悬浮液悬浮到容器（8）的步骤; 减少容器（8）内液体悬浮液的体积; 暂停过滤; 通过移除保留在膜（5）上或膜中的至少一些固体来清洁膜（5）; 以及从容器（8）中除去含有脱落固体的液体。
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