| 摘要 |
2074168 9111249 PCTABS00006 The present invention relates to a spiral-wound membrane module (10) having a semi-permeable membrane (24) which has a central high pressure permeate region (B) flanked on opposite sides by two lower pressure edge portions (A, C). The edge portions (A, C) facilitate the dispersion of and the collection of the feed fluid (93) being treated and assist in obtaining a more uniform flow of the feed fluid (93) through the high pressure region (B) of the membrane. In one embodiment, the module (10) has entrance and exit flow means (20, 20A) for a countercurrent flow of a sweep fluid through the permeate. Preferably, the high pressure permeate region (B) is a high density porous spacer flanked on two sides with low density porous spacers (A, C). In one embodiment, the higher pressure permeate region (B) and flanking low pressure drop permeate regions (A, C) are obtained by specifically positioned lines (301) of adhesive or glue spots (111) (or lines) having a specific size and spacing. Generally, the spots (111) (or lines) (301) are positioned in a generally axial configuration to the central pipe (15). Generally, the glue spots (111) or lines (301) are positioned in the permeate passageway (60) in a pattern to obtain controlled flow of the countercurrent, cocurrent or crosscurrent sweep fluid.
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