摘要
低温多效海水淡化在产生高品质淡化水的同时也会产生含盐量约40000~46000 mg/L的浓盐水,直接排放至海洋会对生态环境、海洋水环境造成较严重的破坏。将富含化学矿物资源的低温多效海水淡化副产浓盐水进行再处置,经新型中空纤维反渗透膜后,电导率可稳定达到81200~86600μS/cm,继而通过一系列化学反应和超滤、反渗透手段去除二次浓盐水中的钙、镁等离子,制成有经济价值的碳酸钙、氢氧化镁等化学品外售。三次浓盐水可直接出售给盐化工厂进行提钾、提溴、制纯碱等。
Low temperature multi-effect seawater desalination will produce high quality desalinated water and produce salty brine with a salt concentration of about 40000-46000 mg/L. If discharged directly to the sea, it will cause serious damage to the ecological environment and marine water environment. The low temperature multi-effect desalination brine with rich chemical mineral resources is retreated. With the new hollow fiber reverse osmosis membrane, the conductivity can reach 81200-86600 μS/cm. Then, through a series of chemical reactions and ultrafiltration, reverse osmosis are used to remove calcium and magnesium plasma from two concentrated brines, and produce valuable chemicals such as calcium carbonate and magnesium hydroxide to sale. Three times concentrated brine can be directly sold to the salinization plant for potassium extraction, bromine extraction, soda ash and so on.
出处
《广东化工》
CAS
2018年第3期48-51,共4页
Guangdong Chemical Industry
基金
国家科技支撑计划课题(2015BAB10B01)
国家"863"项目(2015AA034301)
关键词
海水淡化
浓盐水
中空纤维反渗透膜
脱钙镁
盐化工
desalination
brine
hollow fiber reverse osmosis membrane
decalcified magnesium
salt chemical
作者简介
戴佳月（1986-），女，北京人，工程师，主要研究方向为水处理及浓盐水综合利用技术。
