EDI相比离子交换树脂，2级RO相比1级RO

zlwwinner

优势主要有哪些

zlwwinner

UP过来的看看

zlwwinner

路过的看看啊

beiwei5du

EDI相对于阴阳离子交换树脂是不进行相应的再生的，他是在运行过程中进行再生的，二级反渗透当然比一级反渗透相对更好一些呢！（相当于两次进行除离子吧）。

chenqf0011

同意楼上~~~~~~~~~~~~~~~~···

mily

建议看一下ISPE的基准指南第四卷：Water and Steam Systems(Second Edition) 2011的第5.4章节。
1、连续的去除离子；
2、连续的进行树脂再生；

Advantages:
        typically designed to produce low conductivity water (in compliance with compendial PW)
        elimination of chemical handling and associated costs
        elimination of outside service needs (off-site regenerated resin, management costs, etc.)
        removal of ionized substances, including the weakly ionized substances(e.g., carbon dioxide, ammonia, and some ionized organics)
        limited environmental effect technology (low energy required, low waste generated, no chemicals required for regeneration, etc.)
        electric field in membrane/resin module provides some bacterial control
Disadvantages:
        ionized contamination specific purification technology
        uniqueness of designs for each manufacturer (modules often are not interchangeable)
        UV or sub-micron filtration may be required for further bacterial reduction
        RO generally required as a pre-treatment
        rinse up after chemical sanitization may take hours to reach low conductivity and TOC

duandewu

EDI是自己再生的不要用盐去再生，省力
如果原水水质可以，其实用石英砂过滤器+活性炭过滤器+二级RO+EDI很好，没有软化器可以节省盐与人力

nonono

如果去除软化器，一级反渗透膜会不会很快就结垢？