膜科学与技术

采用高效纳滤-低压反渗透集成膜工艺的海水淡化研究

作者：周栋¹，²，傅寅翼¹，薛立新¹，朱丽静¹，朱鸣鹤²

单位： 1．中国科学院宁波材料技术与工程研究所高分子事业部、中国科学院海洋新材料与应用技术重点实验室、浙江省海洋材料与防护技术重点实验室、中国科学院宁波材料技术与工程研究所，浙江省宁波市中官西路1219号，315201； 2．宁波大学海运学院，浙江省宁波市风华路818号，315211

关键词：高效纳滤；低压反渗透；海水淡化；节能；低成本

出版年,卷(期):页码： 2016,36(3):62-69

摘要：

针对纳滤-反渗透海水淡化（NF-SWRO）工艺第一级脱盐率不高，继而造成第二级操作压力大以及能耗高等问题，本文提出了高效纳滤-低压反渗透（HRNF-LPRO）集成膜工艺用于海水淡化，并进行了初步的探索性研究试验。实验结果表明：在操作压力2.6MPa、1.4MPa条件下，HRNF-LPRO集成工艺可脱除人工海水（34998mg/L）中99.84%的盐分得到淡化海水。ROSA模拟表明，在给水浓度34967.39mg/L条件下，HRNF-LPRO工艺的产水溶解性总固体（TDS）为231.17mg/L，综合产水能耗为3.264 kWh/m³。HRNF-LPRO集成工艺不仅降低了第二级脱盐操作压力，也降低了设备要求，从而有利于降低产水成本。

The salt rejection in the first stage of current nanofiltration-reverse osmosis (NF-SWRO) seawater desalination process is not high, resulting in high operation pressure of second stage and high energy consumption. This study proposed the high rejection nanofiltration-low pressure reverse osmosis (HRNF-LPRO) desalination process. In the NF desalting experimental study, The overall Total Dissolved Solids(TDS) rejection of HRNF-LPRO process was 99.84%, when the TDS of feedwater was 34998mg/L and the operation pressure of the two desalination process were 2.6MPa and 1.4MPa, respectively. If the feedwater TDS was 34967.39 mg/L, ROSA simulation showed that the TDS of permeate should be as low as 231.17 mg/L and the overall energy consumption of product water would reduce to 3.264 kWh/m3. The HRNF-LPRO integrated process is of great significance for reducing the pressure of the second desalination process and the equipment requirements, saving costs of water production.

作者简介：周栋（1988-），男，湖北孝感人，硕士生，从事膜材料制备及应用研究。通讯联系人*，Email: fuyinyi@nimte.ac.cn, xuelx@nimte.ac.cn,

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