纳滤技术在海水淡化中的应用实验研究  

EXPERIMENTAL STUDY OF NANOFILTRATION TECHNOLOGY IN SEAWATER DESALINATION

作　　者：李露[1] 赵河立[1] 邵天宝[1] 潘春佑 刘筱昱 

机构地区：[1]国家海洋局天津海水淡化与综合利用研究所,天津300192

出　　处：《水处理技术》2015年第10期100-103,126,共5页Technology of Water Treatment

基　　金：海洋公益性行业科研专项经费项目(201405035);天津市科技支撑计划重点项目(12ZCZDSF02400)

摘　　要：研究了纳滤在海水淡化中的应用,考察进水压力、温度、流量和进料液溶质含量对纳滤系统脱盐率、各离子截留率的影响。结果表明,各离子截留率和系统脱盐率随进水压力、进水流量的提升而增大,但这种增长趋势最终都趋于平缓;随进水温度、进料液溶质含量的增加反而下降。纳滤膜对SO42-截留率均在98%以上,Mg2+、Ca2+截留率可达93%以上,Cl-、Na+、K+等1价离子的截留率较低。纳滤在较低的压力下对SO42-、Mg2+、Ca2+有着较高的去除率,研究结果能为纳滤膜用于海水淡化提供新的途径,纳滤有望成为较强竞争力的海水淡化技术。This study investigated the nanofiltration applications in desalination, including the effects of water pressure, temperature, flow rate and feed concent on the desalination rate and the ion retention of the nanofiltration system. The results showed that the ion retention and the desalination rate of the desalination system would increase with water pressure and feed concent. But this growth trend would eventually be gently. When water pressure and feed concentration increased to a certain extent, the ion retention and the desalination rate of the desalination system would decrease with the increase of water pressure and feed concentration. The ion retention of nanofiltration membrane for SO4^2- could reach to over 98%. In addition, the ion retention of nanofiltration membrane for Mg^2＋ and Ca^2＋ could reach to more than 93%. Additionally, the ion retention ofnanofiltration membrane for Cl^-, Na^＋, K^＋ and other monovalent ions were relatively low. The results of this study can provide a new way for nanofiltration membrane being used for desalination. The ion retention of nanofiltration for SO4^2-, Mg^2＋, Ca^2＋ would be higher when the water pressure was low. Therefore, nanofiltration technology shows the potential to be a desalination technology with strong competitiveness.

关 键 词：纳滤 海水淡化 脱盐率 离子截留率 

分 类 号：P747.7[天文地球—海洋科学]