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华能上海石洞口第二电厂600MW超临界机组锅炉冲渣水系统由开式排放改造成闭式循环系统后,为达到系统的水量平衡,必须要对冲渣水进行深度处理后作为工业水进行回用。为使冲渣水能达到工业水的水质指标,对冲渣水进行了混凝、沉淀处理工艺的试验、研究,探索出了合适的处理工艺并在现有的工业水澄清池中进行了处理调试,使出水水质完全达到了回用的要求,实现了连续的处理和回用。通过连续处理和回用,达到了冲渣水闭式循环系统的水量平衡,每年减少约330万t冲渣废水的外排和相同数量的长江水的取水,取得了较大的社会效益和经济效益。
Huaneng Shanghai Shidongkou second power plant 600MW supercritical unit boiler slag water system from open discharge into a closed-loop system, in order to achieve the system of water balance, must be on the slag water for further treatment of industrial water reuse . In order to make the slag water reach the water quality index of industrial water, the experiment and research on the coagulation and sedimentation process of the slag water were carried out, and the suitable treatment technology was explored and dealt with in the existing industrial water clarification tank , So that the quality of effluent completely meet the requirements of reuse, to achieve a continuous treatment and reuse. Through the continuous treatment and reuse, the water balance of the closed-cycle system of the slag-dumped water is reached, and the annual discharge of about 3.3 million t effluent from the dross discharge and the same amount of water intake from the Yangtze River have been reduced, thus achieving great social and economic benefits benefit.