纳滤作为反渗透海水淡化预处理的研究  

Research on nanofiltration pretreatment of reverse-osmosis sea water desalination

作　　者：陈侠[1] 詹志斌[1] 陈丽芳[1] 朱华兵[1] 戴宏茂[1] 

机构地区：[1]天津科技大学海洋科学与工程学院,天津市海洋资源与化学重点实验室,天津300457

出　　处：《膜科学与技术》2013年第5期59-62,72,共5页Membrane Science and Technology

摘　　要：为选择适合于海水软化的纳滤膜,在模拟渤海海水条件下,考查NF270、ESNA、DK 3种知名品牌纳滤膜对海水中各主要离子截留性能.结果表明:NF270和ESNA纳滤膜对二价离子截留率低,不能有效分离一、二价离子,而DK膜能有效的分离海水中高价离子和低价离子.其对二价离子截留率均达到92%以上,对一价离子截留率在30%以下,对总溶解固体(TDS)的去除率38%左右.该膜能有效降低海水淡化结垢风险,提高系统回收率,适合作为反渗透海水淡化的预处理.To select suitable nanofiltration membrane for seawater softening, the main ions rejection performance of the three famous brand nanofiltration menbranes NF270, ESNA, DK were done in the condition of simulated BoHai seawater. The results show that the membranes NF270 and ESNA have low rejection of divalent ions, they can＇t separate monovalention ions from divalent ion effectively. The DK membrane can separate monovalent ions from divalent ion effectively, and the rejection rate of divalent ions is above 92%, the rejection rate of monovalent ions is below 30%, the rejection rate of TDS is about 38%. So the nanofiltration membrane of DK is suitable for the pretreatment of SWRO for effectively reducing the desalination fouling risk and improving system recovery.

关 键 词：反渗透 海水淡化 纳滤 预处理 

分 类 号：P747[天文地球—海洋科学]