摘要：

某热电厂化水处理车间采用“反渗透系统+混合离子交换器”工艺制取除盐水，每年产生约30万t反渗透浓水。这些反渗透浓水具有较高的回收价值，该厂采用电驱动膜工艺对其进行脱盐处理。对反渗透浓水处理的具体工艺流程、工艺参数及运行效果进行了介绍。运行结果表明，该工艺对反渗透浓水的回收率达88%，脱盐率达85%，产水电导率低于370 μS/cm，产水无需经过换热器加热可直接作为反渗透进水，年节约自来水264 420 m³，年节约蒸汽能11 105 GJ。电费和药剂费合计1.51元/m³。

关键词: 反渗透浓水, 电驱动膜分离技术, 脱盐, 产水率

Abstract:

The chemical water treatment workshop of a thermal power plant adopts the process of “reverse osmosis system+mixed ion exchanger” to produce desalted water，which produces about 300 000 tons of reverse osmosis concentrated water every year. This reverse osmosis concentrated water has high recovery value and the electric drive membrane process is used for desalination treatment. The specific process flow，process parameters and operation effect were introduced. The operating results showed that the recovery rate of reverse osmosis concentrated water and the desalination rate was 88% and 85%. The conductivity of produced water was lower than 370 μS/cm，which could be directly used as reverse osmosis water inlet without being heated by a heat exchanger. The annual saving of tap water was 264 420 m³，the annual saving of steam energy was 11 105 GJ，and the total cost of electricity and medicine was 1.51 ￥/m³.

Key words: reverse osmosis concentrated water, electrodialysis reversal, desalination, water production rate

中图分类号: 

• X703