火电厂废水处理中化学沉淀法的优化与实践

Optimization and Practice of Chemical Precipitation Method in Wastewater Treatment of Thermal Power Plants

为了提高传统化学沉淀法的沉淀效果,提出了新型化学沉淀法的反应条件和沉淀剂比例。研究首先对比了4种常见沉淀剂的沉淀效果,发现硫化钠和硫酸铝分别对重金属和悬浮物去除效果最佳。对改进化学沉淀法进行实证分析,为期2个月的废水处理实验结果表明,采用新型化学沉淀法后,污染物质量浓度从120 mg/L降至52 mg/L,有害物质量浓度从45 mg/L降至18 mg/L。实践证明了改进化学沉淀法在火电厂废水处理中的实际应用价值和潜力,为火电厂废水处理提供了高效、可行的技术方案,对环保和可持续发展具有积极意义。

In order to improve the precipitation effect of traditional chemical precipitation method,the reaction conditions and precipitant ratio of a new chemical precipitation method were proposed.The study first compared the precipitation effects of four common precipitants and found that sodium sulfide and aluminum sulfate had the best removal effects on heavy metals and suspended solids,respectively.Empirical analysis was conducted on the improved chemical precipitation method,and the results of a 2-month wastewater treatment experiment showed that after adopting the new chemical precipitation method,the pollutant concentration decreased from 120 mg/L to 52 mg/L,and the harmful substance content decreased from 45 mg/L to 18 mg/L.Practice has proven the practical application value and potential of improving chemical precipitation method in wastewater treatment of thermal power plants,providing efficient and feasible technical solutions for wastewater treatment of thermal power plants,and having positive significance for environmental protection and sustainable development.