膜法海水淡化中试研究  

Pilot Study on Membrane Seawater Desalination

作　　者：尉凤珍 刘运东 张立江 

机构地区：[1]葛洲坝水务投资有限公司,北京100027

出　　处：《中国给水排水》2017年第23期47-50,共4页China Water & Wastewater

摘　　要：采用超滤及反渗透膜法技术处理某钢铁厂热法海水淡化产生的浓水,浓水温度约为42℃,预处理采用冷却塔将原浓水温度分别降至32和28℃,分别采用一级和二级反渗透进行处理,考察了温度、反渗透级数对产水中氯离子浓度的影响,一级和二级反渗透系统的回收率以及预处理中砂滤及超滤的除浊效果。结果表明,随着水温的升高,系统对氯离子的去除率降低,当水温达到32℃时,采用一级反渗透无法保证产品水中氯离子浓度满足要求,系统采用一、二级反渗透产水混合方式即可满足出水水质要求;一级和二级反渗透的回收率分别为40%和90%;砂滤产水浊度受系统进水浊度影响严重,超滤产水浊度一直很稳定;系统脱盐率稳定达到99.7%以上。The inlet water temperature was around 42 ℃, and a cooling tower was used to de- crease the temperature to 32 ℃ and 28 ℃, respectively. One-stage and two-stage RO system was used to treat the raw concentrated water. The influence of the temperature and RO stages on the chloride content of product water, the recovery of RO, and the turbidity removal efficiency in the sand filtration and UF process were investigated. The results showed that the chloride removal rate decreased with the increase of the temperature. If only one-stage RO was used, the chloride content of product water could not meet customer＇ s requirement ; however, product water from the mixture of one- and two-stage could meet the requirement. The one-stage RO recovery rate was 40%, and that of the two-stage was 90% ; the turbidity of the sand filtration effluent was influenced by the inlet water turbidity, but the turbidity of UF effluent was very steady. The desalination rate of the svstem reached ahnva O0 7~/~ ~t^kl-.~

关 键 词：海水淡化 超滤 反渗透 氯离子 回收率 脱盐率 浊度 

分 类 号：P747[天文地球—海洋科学]