反渗透海水淡化系统双端产水脱盐工艺探讨  

Discussion on Double‑end Water Production Process of Reverse Osmosis Seawater Desalination System

作　　者：薛喜东 潘春佑 冯涛 王可宁 李露 邵天宝 XUE Xi‑dong;PAN Chun‑you;FENG Tao;WANG Ke‑ning;LI Lu;SHAO Tian‑bao(The Institute of Seawater Desalination and Multipurpose Utilization,MNR,Tianjin 300192,China)

机构地区：[1]自然资源部天津海水淡化与综合利用研究所,天津300192

出　　处：《中国给水排水》2023年第21期111-116,共6页China Water & Wastewater

基　　金：中央级公益性科研院所基本科研业务费专项资金资助项目(K-JBYWF-2021-QR06、K-JBYWF-2021-ZT01)。

摘　　要：结合工业用水对淡化水质的特殊要求,设计了“一级反渗透双端产水+部分二级反渗透”工艺,采用反渗透系统模拟软件研究了海水温度、二级进水比例、膜型号等因素对产水水质的影响,并进行了经济性分析。结果表明,降低海水温度和提高二级进水比例有利于提升产水水质,双端产水工艺水质受这两种因素的影响较单端产水工艺要弱;与高脱盐率膜相比,大通量膜的二级启动温度降低、二级进水比例增加;在试验条件下,双端产水工艺的二级启动温度和进水比例分别为13℃、20%,与传统单端产水工艺相比,双端产水工艺使二级反渗透的规模、设备投资和氢氧化钠消耗量均降低50%左右,电耗减少0.08 kW·h/m^(3)。This paper designed a desalination process consisting of primary reverse osmosis double‑end water production and partial secondary reverse osmosis,investigated the effects of seawater temperature,secondary influent ratio,membrane type and other factors on effluent quality by using reverse osmosis system simulation software,and analyzed the operational cost according to the special requirements of desalting water quality for industrial usage.Reducing seawater temperature and increasing the secondary influent ratio were conducive to improving the effluent quality,and the effluent quality of the double‑end water production process was less affected by two factors than that of the singleend water production process.Compared with the high desalination membrane,the secondary start‑up temperature of the high flux membrane decreased,and the secondary influent ratio increased.Under the test conditions,the secondary start‑up temperature and secondary influent ratio of the double‑end water production process were 13℃and 20%,respectively.Compared with the traditional single‑end water production process,the double‑end water production process reduced the scale,equipment investment and sodium hydroxide consumption of the secondary reverse osmosis all by 50%,and the power consumption by 0.08 kW·h/m^(3).

关 键 词：反渗透海水淡化 双端产水 氯离子 总溶解性固体 

分 类 号：TU991[建筑科学—市政工程]