超临界水氧化工艺降低高氯酸铵废水中氨氮浓度的试验

摘要

通过建立超临界水氧化试验装置，采用超临界技术对固体推进剂生产废水进行处理，研究了含高氯酸铵废水NH3N去除率与氧气流量、废水流量、反应釜温度和压力的关系。结果表明最佳的超临界水氧化条件：温度为390～410℃、压力为22MPa、控制氧气流量为0．6～1．0L/min、废水流量为2L/h，NH3N去除率可达99％，处理后NH3N浓度低于3mg/L，达到了国家排放标准。%The supercritical water oxidation device and the supercritical technology was used to treat solid propellant production wastewater. The relationship among oxygen flow,waste water flow,temperature,pressure of reactor and the removal efficiency of NH3 N in ammonium perchlorate wastewater was investigated. The results show that the optimal conditions of the supercritical water oxidation are as follows:temperature is 390~410℃,pressure is 22 MPa,oxygen flow is 0. 6~1. 0 L/min and wastewater flow is 2 L/h. Under such condition,removal efficiency of NH3 N can reach 99%,NH3 N concentration of treated waste water is less than 3 mg/L, which meet national standards.