反渗透膜
反渗透膜是在压力驱动下,允许溶剂分子透过而不允许溶质分子透过的一种功能性的半透膜。反渗透是最精密的膜法液体分离技术,它能阻挡几乎所有溶解性盐及分子量大于100的有机物,但允许水和微量盐分透过。
反渗透装置由高压泵、反渗透膜组、在线仪表、撬座、阀门组、在线仪表等构成,其作用是脱除水中98%以上的电解质(盐份)和粒径大于0.0005微米的杂质。
反渗透膜需要制成一定构型才可用于水处理。目前膜的构型主要有平板式、管式、卷式和中空纤维式。但常用于大型水处理工程的是卷式膜元件。
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