公开(公告)号：US5374357A

公开(公告)日：1994-12-20

申请号：US33860

申请日：1993-03-19

申请人： Daniel L. Comstock ,  Lee A. Durham ,  Mark A. Warren ,  Bryce P. Anderson

发明人： Daniel L. Comstock ,  Lee A. Durham ,  Mark A. Warren ,  Bryce P. Anderson

IPC分类号： B01D24/10 ,  B01D37/03 ,  C02F1/28 ,  C02F1/54

CPC分类号： B01D37/03 ,  B01D24/105 ,  B01D2201/085

摘要： Colloidal matter is removed from a fluid flow by first adsorbing a coagulant onto the surface of a finely divided filter media, and thereafter passing a colloid-containing fluid through the filter media. The adsorbing of coagulant is accomplished with the filter off-line, and it is returned on-line for filtering of the fluid. After the coagulant is adsorbed onto the filter media, it is not necessary to continue feeding coagulant during on-line operation, as the adsorbed coagulant captures the colloidal matter in the fluid and retains it on the surface of the filter media. The captured colloidal matter is removed during back washing of the filter media.

摘要翻译： 通过首先将凝结剂吸附在细碎的过滤介质的表面上，然后使含胶体的流体通过过滤介质，从流体流中除去胶体。 凝结剂的吸附是用离线过滤器完成的，并在线返回以过滤流体。 在凝结剂被吸附到过滤介质上之后，由于吸附的凝结剂捕获流体中的胶体物质并将其保留在过滤介质的表面上，所以在在线操作期间不需要继续供给凝结剂。 在过滤介质的背洗过程中去除捕获的胶体物质。

公开(公告)号：US5198116A

公开(公告)日：1993-03-30

申请号：US832941

申请日：1992-02-10

申请人： Daniel L. Comstock ,  Lee A. Durham

发明人： Daniel L. Comstock ,  Lee A. Durham

IPC分类号： B01D61/04 ,  B01D65/02 ,  B01D65/08

CPC分类号： B01D65/02 ,  B01D61/025 ,  B01D61/04 ,  B01D65/08 ,  B01D2311/04 ,  B01D2321/16

摘要： The optimum antifoulant concentration and cleaning interval for reverse osmosis membranes is determined by providing samples of a liquid to be purified in a reverse osmosis system, the samples having a range of antifoulant concentrations added. The zeta potential for each sample is measured, and the amount of antifoulant that provides the lowest (most negative) zeta potential is selected as the preferred antifoulant concentration. A cleaning frequency sample of the liquid to be purified with the preferred antifoulant concentration is prepared and passed across a cleaning frequency membrane that passes dissolved matter in the permeate but does not pass colloidal material. The rate of change in flow of the permeate of the cleaning frequency sample is measured as a function of time, and the cleaning frequency of the cleaning frequency sample is determined. In one embodiment, the cleaning frequency membrane used in the testing is comparable to the filter support used in the reverse osmosis system, but has no separation membrane thereon. A test cell for measuring permeation through the cleaning frequency membrane is provided.

摘要翻译： 通过在反渗透系统中提供待纯化液体的样品来确定反渗透膜的最佳防污剂浓度和清洁间隔，样品具有添加的防污浓度范围。 测量每个样品的ζ电位，并且选择提供最低（最负的）ζ电位的防污剂的量作为优选的防污剂浓度。 制备具有优选防污剂浓度的待纯化液体的清洗频率样品，并通过穿过渗透物中的溶解物质但不通过胶体材料的清洗频率膜。 作为时间的函数测量清洗频率样品的渗透物的流量变化率，并且确定清洗频率样品的清洗频率。 在一个实施方案中，用于测试的清洗频率膜与反渗透系统中使用的过滤器支架相当，但在其上没有分离膜。 提供了用于测量通过清洁频率膜的渗透的测试池。