关键词: 海水淡化, 浓海水, 化学资源, 综合利用

Abstract: Multipurpose utilization of brine from seawater could not only realize zero-discharge from seawater desalination plant，but also effectively utilize the valuable chemical resources. The current main multipurpose utilization technologies were summarized in the paper. The technologies combined with the salt production method by solar evaporation，based on the concentration by electrodialysis，and the comprehensive utilization technique to finally prepare liquid salt，were emphasized；the respective advantages and existing problems were also discussed; the application conditions and prospects were described from the perspectives of time and space. It was pointed out that the integration of electrodialysis and nanofiltration can be a fairly good way of realizing factory production of salt and other chemicals in the future；furthermore，development of new techniques with high resource utilization ratio，high additional value of products，less land occupation，utilization of renewable energy，comprehensive extractions of trace elements such as lithium，uranium，boron，iodine，cesium，were proposed as the research directions and development trends of multipurpose utilization technologies of brine in China.

Key words: seawater desalination, brine, chemical resources, multipurpose utilization