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    電子半導體行業凈水設備反滲透一般自來水或地下水經一級反滲透水處理設備處理后，產水電導率<10μS/cm，經二級反滲透水處理設備后產水電導率 <5μS/cm甚至更低，在反滲透水處理設備系統后輔以離子交換設備或EDI設備可以制備超純水，使電阻率達到18兆歐姆(電導率=1/電阻率)是反滲透是用足夠的壓力使溶液中的溶劑(一般常指水）通過反滲透膜(一種半透膜)而分離出來與滲透方向相反，可使用大于滲透壓的反滲透法進行分離、提純和濃縮溶液。反滲透膜的主要分離對象是溶液中的離子范圍。

    電(dian)(dian)(dian)(dian)子(zi)(zi)半導體行業凈水設(she)備原理(li)EDI純水機主要是利用(yong)交換(huan)(huan)膜(mo)對離(li)(li)子(zi)(zi)的(de)(de)(de)(de)(de)選擇性滲透。電(dian)(dian)(dian)(dian)極(ji)脫(tuo)鹽(yan)(EDI)設(she)備由(you)陰(yin)極(ji)和陽(yang)極(ji)電(dian)(dian)(dian)(dian)極(ji)板(ban)、離(li)(li)子(zi)(zi)交換(huan)(huan)樹脂(zhi)(一(yi)種用(yong)化學方法制(zhi)備聚合(he)物)、離(li)(li)子(zi)(zi)交換(huan)(huan)膜(mo)(負(fu)膜(mo)、正膜(mo))等組成(cheng)(cheng)。在(zai)(zai)電(dian)(dian)(dian)(dian)極(ji)脫(tuo)鹽(yan)(EDI)的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)極(ji)之(zhi)間，通常有多組負(fu)膜(mo)、正膜(mo)和隔板(ban)(A、B)交替排列，形(xing)成(cheng)(cheng)濃(nong)縮(suo)(suo)室(shi)(shi)和稀釋(shi)室(shi)(shi)。在(zai)(zai)直流電(dian)(dian)(dian)(dian)的(de)(de)(de)(de)(de)作(zuo)用(yong)下，稀釋(shi)室(shi)(shi)水中(zhong)(zhong)(zhong)的(de)(de)(de)(de)(de)陽(yang)離(li)(li)子(zi)(zi)向(xiang)負(fu)極(ji)遷移(yi)(yi)并(bing)穿過正極(ji)膜(mo)，在(zai)(zai)濃(nong)縮(suo)(suo)室(shi)(shi)中(zhong)(zhong)(zhong)被(bei)(bei)負(fu)極(ji)膜(mo)截留;水中(zhong)(zhong)(zhong)的(de)(de)(de)(de)(de)陰(yin)離(li)(li)子(zi)(zi)向(xiang)正極(ji)遷移(yi)(yi)，在(zai)(zai)濃(nong)室(shi)(shi)中(zhong)(zhong)(zhong)被(bei)(bei)正極(ji)膜(mo)截留，使(shi)水中(zhong)(zhong)(zhong)通過淡室(shi)(shi)的(de)(de)(de)(de)(de)離(li)(li)子(zi)(zi)數逐漸減(jian)少(shao)。成(cheng)(cheng)為淡水，而(er)濃(nong)縮(suo)(suo)室(shi)(shi)中(zhong)(zhong)(zhong)的(de)(de)(de)(de)(de)水，由(you)于濃(nong)縮(suo)(suo)室(shi)(shi)中(zhong)(zhong)(zhong)陰(yin)陽(yang)離(li)(li)子(zi)(zi)的(de)(de)(de)(de)(de)不(bu)斷(duan)涌(yong)入，介電(dian)(dian)(dian)(dian)離(li)(li)子(zi)(zi)的(de)(de)(de)(de)(de)濃(nong)度不(bu)斷(duan)增加，成(cheng)(cheng)為濃(nong)縮(suo)(suo)水，從而(er)達到脫(tuo)鹽(yan)的(de)(de)(de)(de)(de)目(mu)的(de)(de)(de)(de)(de)，純化、濃(nong)縮(suo)(suo)或精制(zhi)。 在(zai)(zai)一(yi)定(ding)電(dian)(dian)(dian)(dian)流作(zuo)用(yong)下，水分子(zi)(zi)被(bei)(bei)電(dian)(dian)(dian)(dian)離(li)(li)成(cheng)(cheng)H和OH-離(li)(li)子(zi)(zi)，活性樹脂(zhi)再生，實現連續制(zhi)水和再生。