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NANOFILTRATION SYSTEM FOR WATER SOFTENING WITH INTERNALLY STAGED SPIRAL WOUND MODULES
NANOFILTRATION SYSTEM FOR WATER SOFTENING WITH INTERNALLY STAGED SPIRAL WOUND MODULES
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机译:具有内部分段螺旋缠绕模块的水软化纳米过滤系统
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摘要
A spiral wound membrane filtration module is operated with a single pass through the feed side and without cross-flow on the permeate side. Recovery is 70% or more and feed side velocities are between 0.05 and 0.4 feet per second. The module may have dams in the spacer material on the shell/feed side to provide a feed path with multiple passes across the membrane leaves. A small-scale system for using such a module, for example to soften and filter water with a nanofiltration membrane, is described. The system includes a chemical cleaning apparatus and process. Multiple membrane materials can be used in order to adapt the module selectivity.
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