陶氏纳滤膜NF270-400/34i电泳漆纳滤膜

陶氏纳滤膜NF270-400/34i脱盐型纳滤膜的原理与超滤及反渗透等膜分离过程一样，也是以压力差为推动力的膜分离过程，是一个不可逆过程。其分离机制可以运用电荷模型(空间电荷模型和固定电荷模型)、细孔模型以及近年来才提出的静电排斥和立体阻碍模型等来描述。与其他膜分离过程比较，纳滤的一个优点是能截留透过超滤膜的小分子量的农业生产体系物，又能透析反渗透膜所截留的部分无机盐——也就是能使“浓缩”与脱盐同步进行。

陶氏纳滤膜NF270-400/34i

陶氏纳滤膜NF270-400/34i优点

好的农业生产体系物的移去除

部分水保留软化特性

有高收益高通量的效果

低能耗降低了功耗和成本

长时间好良好的除尘力

The DOW FILMTEC NF270-400/34i element is a high area, high productivity element designed to remove a high percentage of TOC and THM precursors while having a medium to high salt passage and medium hardness passage. It is an ideal element for surface and groundwater applications where good organic removal is desired with partial softening in order to maintain a minimum level of hardness for organoleptic properties and preservation of distribution networks. The high active area membrane combined with low net driving pressure of the membrane allows the removal of these compounds at low operating pressure. It uses a 34 mil feed spacer to lessen the impact of fouling on pressure drop across a vessel and enhance cleaning effectiveness. The iLEC™ interlocking end caps reduce system operating costs and the risk of o-ring leaks that can cause poor water quality.

Advantages:

Good organic (NOM) removal

Partial softening preserves water character

High flux results in high yields

Low energy usage reduces power consumption and costs

Durable with good cleanability for long element life

Thicker feed spacer delivers better tolerance of suspended solids and enables more efficient cleaning of organic material from the element

FILMTEC performance and quality