海水淡化副产浓海水综合利用方案的探讨

我国是水资源严重短缺的国家,海水淡化是解决我国水资源危机的重要措施之一.淡化过程产生的浓海水直接排放将对生态环境造成影响,而其较高的浓度和稳定的性质为海水化学资源的综合利用提供了方便.文章介绍了包括基于盐田法的传统综合利用方案、基于电渗析浓缩制盐方案、基于浓海水化学资源综合提取的方案和反渗透-电渗析集成的方案等浓海水综合利用的方案及其优缺点,探讨了这些技术的应用可行性,提出了发展浓海水综合利用技术的建议.

Discussion on Comprehensive Utilization of Concentrated Brine from Seawater Desalination

Seawater desalination is one of the most important ways to settle the problem of water resources shortage in China. The direct drain of concentrated brine produced in the desalination will destruct the eco - environments to some degree. Furthermore it makes the comprehensive utilization of chemical resource more effective because of the high and stable concentration of the concentrated seawater. The comprehensive utilization processes of concentrated seawater including the process based on the traditional brine pond, the method of salt production by electrodialysis, the technology of synthetically extracting the chemical resources from the brine and the process of RO-electrodialysis are introduced. The advantages and disadvantages as well as the feasibility of those technologies application in China are discussed in detail. Some proposals about the development of concentrated seawater utilization also are put forward.