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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：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：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：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：US20130037467A1
公开(公告)日：2013-02-14
申请号：US13643619
申请日：2011-03-28
CPC分类号： B01D63/02 , B01D65/02 , B01D2313/08 , B01D2313/10 , B01D2313/26 , B01D2321/04 , B01D2321/185
摘要： In a first membrane filtration module comprises a membrane module comprising a plurality of permeable hollow membranes; a fluid distribution device adapted to removably surround at least a portion of the membranes of the membrane module, the fluid distribution device comprising a plurality of through-hole openings for distributing a fluid, and the fluid distribution device adapted to distribute a flow of fluid along a surface of the permeable hollow membranes. In a second membrane filtration device comprises a membrane module comprising a plurality of permeable hollow membranes, each of the permeable hollow membranes having a surface; and a gas distribution device: adapted to distribute gas bubbles to the surface of the permeable hollow membrane, adapted to removably surround at least a portion of the plurality of permeable hollow membranes, and defining a plurality of through openings for distributing the gas bubbles to the membranes.
摘要翻译： 在第一膜过滤组件中包括包含多个可渗透中空膜的膜组件; 流体分配装置，其适于可移除地围绕所述膜组件的膜的至少一部分，所述流体分配装置包括用于分配流体的多个通孔开口，并且所述流体分配装置适于分布流体流 渗透性中空膜的表面。 在第二膜过滤装置中包括膜组件，其包括多个可渗透的中空膜，每个可渗透中空膜具有表面; 以及气体分配装置：适于将气泡分配到可渗透中空膜的表面上，适于可移除地围绕多个可渗透中空膜的至少一部分，并且限定多个通孔，用于将气泡分配到 膜。
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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：US09914097B2
公开(公告)日：2018-03-13
申请号：US13643619
申请日：2011-03-28
CPC分类号： B01D63/02 , B01D65/02 , B01D2313/08 , B01D2313/10 , B01D2313/26 , B01D2321/04 , B01D2321/185
摘要： In a first membrane filtration module comprises a membrane module comprising a plurality of permeable hollow membranes; a fluid distribution device adapted to removably surround at least a portion of the membranes of the membrane module, the fluid distribution device comprising a plurality of through-hole openings for distributing a fluid, and the fluid distribution device adapted to distribute a flow of fluid along a surface of the permeable hollow membranes. In a second membrane filtration device comprises a membrane module comprising a plurality of permeable hollow membranes, each of the permeable hollow membranes having a surface; and a gas distribution device: adapted to distribute gas bubbles to the surface of the permeable hollow membrane, adapted to removably surround at least a portion of the plurality of permeable hollow membranes, and defining a plurality of through openings for distributing the gas bubbles to the membranes.
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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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