化工废水的超临界水氧化研究  

Research on Supercritical Water Oxidation of Industrial Wastewater

作　　者：夏前勇[1] 郭卫民[1] 申哲民[1] 檀雅琴[1] 纪文超[1] 朱慧岑[1] 

机构地区：[1]上海交通大学环境科学与工程学院,上海200240

出　　处：《安全与环境工程》2014年第5期78-83,93,共7页Safety and Environmental Engineering

基　　金：国家自然科学基金项目(21177083)

摘　　要：在超临界条件下,管式反应器中超临界水的各种参数是很难获得的。本文在管式反应器中,以空气作为氧化剂,以实际化工废水作为研究对象,开发设计了一套大型中试超临界水氧化（SCWO）系统,并将所有的反应过程都控制在623.2-793.2K和24MPa的条件下,对此套连续化SCWO中试设备对实际化工废水的处理效果进行了试验研究。试验结果表明：随着反应温度和停留时间的增加,COD的去除率明显升高;通过比较进、出水组分的GC-MS图谱可以看出,原水中存在15种主要难降解有机污染物,包括杂环化合物和多环胺类等,但在出水中仅发现一种有机污染物存在,且其浓度也仅仅约为初始浓度的10%。此外,还对整个SCWO系统的能量衡算进行了分析并得到了能量自平衡的曲面图,结果显示当化工废水的COD浓度在183-437g/L且流速控制在20.83-104.17kg/h的条件下,整个系统即能达到自平衡状态。In supercritical water circumstances,it is hard to obtain various parameters of pilot-scale reactor.The operation data of pilot-scale reactor is very valuable in large-scale industrial application,in which air is used as the oxidant reagent.This paper applies supercritical water oxidation（SCWO）to industrial wastewater treatment.All the processes are undertaken in a pilot-scale reactor under 623.2-793.2Kand24 MPa.The results clearly indicate that the degradation efficiency（DE）increases significantly with the rise of temperature and residence time.The influent and effluent are monitored by Gas Chromatography Mass Spectrometry（GC-MS）.There are fifteen kinds of matters including heterocyclic compounds in the raw wastewater.Most of them are unavailable in the effluent.Only 10%of the original heterocyclic amine remains.In addition,it studies the energy balance of SCWO pilot-scale system under various conditions：temperature,residence time and chemical oxygen demand（COD）concentration.In this pilot-scale reactor,the energy is balanced and extra energy is not needed when the COD concentration varies between 183-437g/L and flow rate ranges from 20.83kg/h to 104.17kg/h.This study is significant for SCWO industrial operation and its energy evaluation.

关 键 词：超临界水氧化 中试设备 能量平衡 化工废水 

分 类 号：X703[环境科学与工程—环境工程] X78