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    • 3. 发明申请
    • Backwash
    • 反洗
    • US20070007205A1
    • 2007-01-11
    • US10569565
    • 2004-08-27
    • Warren JohnsonThomas BeckFufang ZhaHuw LazaredesZhiyi Cao
    • Warren JohnsonThomas BeckFufang ZhaHuw LazaredesZhiyi Cao
    • B01D65/02
    • B01D65/08B01D61/14B01D63/02B01D2321/185
    • 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operation wherein feed containing contaminant matter is applied to one side of the membrane wall and filtrate is withdrawn from the other side of the membrane wall, the method including: removing liquid from the feed-containing vessel (3) until the level of liquid in the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.
    • 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。
    • 5. 发明申请
    • CLEANING IN MEMBRANE FILTRATION SYSTEMS
    • 膜过滤系统中的清洁
    • US20110114557A2
    • 2011-05-19
    • US11722411
    • 2005-12-19
    • Warren JohnsonThomas BeckRebecca Yeo
    • Warren JohnsonThomas BeckRebecca Yeo
    • B01D65/02
    • B01D65/02B01D63/02B01D2315/06B01D2321/16B01D2321/162B01D2321/164B01D2321/168C02F1/444
    • A method of cleaning permeable, hollow membranes (6) in an arrangement of the type wherein a pressure differential is applied across the walls (15) of the permeable, hollow membranes (6) immersed in a liquid suspension, the liquid suspension being applied to the outer surface of the porous hollow membranes (6) to induce and sustain filtration through the membrane walls (15) wherein some of the liquid suspension passes through the walls (15) of the membranes (6) to be drawn off as clarified liquid or permeate from the hollow membrane lumens (7), and at least some of the solids are retained on or in the hollow membranes (6) or otherwise as suspended solids within the liquid surrounding the membranes (6). The method of cleaning comprises the steps of applying a cleaning solution (14) to one side of the membrane wall (15); applying a pressure differential across the membrane wall (15) to cause flow of the cleaning solution (14) through the wall (15) from the one side of the membrane wall (15) to the other side of the membrane wall (15) and applying a reverse pressure differential across the membrane wall (15) to cause flow of the cleaning solution (14) through the wall (15) from the other side of the membrane wall (15) back to the one side of the membrane wall (15). A method of determining the amount of chemical cleaning solution required is also disclosed.
    • 一种以这种类型布置的可清洁的中空膜(6)的清洁方法,其中在穿过液体悬浮液的可渗透的中空膜(6)的壁(15)上施加压力差,该液体悬浮液被施加到 多孔中空膜(6)的外表面通过膜壁(15)诱导和维持过滤,其中一些液体悬浮液通过膜(6)的壁(15)被作为澄清的液体或者 从中空膜腔(7)渗透,并且至少一些固体保留在中空膜(6)上或其中,作为悬浮固体保留在膜(6)周围的液体中。 清洗方法包括以下步骤:将清洁溶液(14)施加到膜壁(15)的一侧; 在所述膜壁(15)上施加压力差以使所述清洁溶液(14)从所述膜壁(15)的一侧到所述膜壁(15)的另一侧通过所述壁(15)流动,并且 在所述膜壁(15)上施加反向压力差以使所述清洁溶液(14)从所述膜壁(15)的另一侧通过所述壁(15)流回所述膜壁(15)的一侧 )。 还公开了确定所需化学清洗溶液量的方法。
    • 8. 发明申请
    • Continuous pressure decay test
    • 连续压力衰减试验
    • US20070056905A1
    • 2007-03-15
    • US10597903
    • 2005-02-18
    • Thomas BeckWarren Johnson
    • Thomas BeckWarren Johnson
    • B01D65/02
    • B01D65/102B01D63/024B01D65/02B01D2315/06B01D2321/04B01D2321/18
    • A continuous integrity test is performed on membranes in a membrane filtration system during the backwashing phase. The membrane pores are backwashed by applying a gas at a pressure below the bubble point to liquid permeate within the membrane lumens to displace the liquid permeate within the lumens through the membrane pores. An integrity test is performed on the membranes by allowing the gas pressure on the lumen side of the membrane walls to increase to a predetermined level above the pressure on the other side of the membrane walls, then isolating the lumen side of the membranes and measuring the reduction in gas pressure on the lumen side of the membrane walls resulting from gas passing through the membrane walls over a predetermined period. The measured reduction in pressure is then compared against a predetermined value to determine the integrity of said membranes.
    • 在反冲洗阶段期间,在膜过滤系统中的膜上进行连续完整性测试。 通过将低于起泡点的压力施加气体到膜腔内的液体渗透物来回流膜孔,以通过膜孔移动腔内的液体渗透物。 通过使膜壁的内腔侧的气体压力增加到高于膜壁另一侧的压力的预定水平,然后隔离膜的内腔侧面并测量 在预定的时间内,气体通过膜壁导致的膜壁的管腔侧的气压降低。 然后将测量的压力降低与预定值进行比较以确定所述膜的完整性。