陶氏FILMTEC反滲透（RO）和納濾（NF）膜技術(shù)，不論用在小型系統(tǒng)還是巨型水處理系統(tǒng)，處理天然苦咸水和海水時(shí)，被*為zui有效能和的關(guān)鍵部件。RO和NF可以單獨(dú)或組合在一起使用，或與其它過(guò)程如離子交換結(jié)合，減少再生劑的消耗和廢水量，同時(shí)制造出更高品質(zhì)的純水，或與蒸餾過(guò)程結(jié)合，提高設(shè)備利用率，減少能耗并得到符合要求的成品水。
陶氏FILMTEC品牌的膜元件為螺旋卷式結(jié)構(gòu)，簡(jiǎn)稱(chēng)卷式結(jié)構(gòu)。它由多葉膜袋組成，每一葉膜袋由兩片膜正面相背的膜片、置于兩片膜片間的產(chǎn)品水流道和放置在膜表面的湍流網(wǎng)格狀進(jìn)水流道組成，該膜袋三邊用膠粘劑密封，第四邊開(kāi)口于有孔的產(chǎn)水收集管上。與其它元件結(jié)構(gòu)，如管式、板式和中空纖維式相比，具有水流分布均勻、耐污染程度高、更換費(fèi)用低、外部管路簡(jiǎn)單、易于清洗維護(hù)保養(yǎng)和設(shè)計(jì)自由度大等許多優(yōu)點(diǎn)，成為目前主要膜元件結(jié)構(gòu)形式。
Dow膜芯簡(jiǎn)表
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