纳滤膜处理火力发电厂循环冷却排污水的探讨

Treatment of the circulating cooling sewage in the power plant by using NF membrane

对纳滤膜技术处理火力发电厂循环冷却排污水做了简要介绍。纳滤可有效地去除循环冷却排污水中的悬浮物和总硬度 ,降低含盐量 ,其中总溶解性固体和总硬度的去除率达到 90 %以上 ,含盐量去除率达到 80 %以上 ,处理后的水质符合工业用水和循环水补充用水的水质要求。纳滤膜处理循环冷却排污水在技术上是可行的 ,处理后的水可回用于电厂补给水系统 ,可以大大减少火力发电厂的耗水量和工业废水排放量 ,达到节水和“零”

The nanofiltrating (NF)membrane which has been used for treating the circulating cooling sewage in heat power plants is introduced briefly. NF can effectly remove the suspended particles,and lower the total hardness and reduce the salt content in the circulating cooling sewage. The removal of the total disolved solid(TDS) and the total hardness are above 90%,and that of the salt content is more than 80%. The quality of treated water can meet the requirements of industrial use and supplying water of circulating cooling. The treatment of the circulating cooling sewage in heat power plant is feasible to use nanofiltrating membrane softening equipment. The treated water can be reused in supplying systems. It could greatly decrease water consumption and drainage quantity of industry wastewater. It was a promising technology for water saving and zero discharge in the fuel power plant.