超临界水氧化处理二硝基甲苯废水研究  

Study on 2,4-Dinitrotoluene Waste Water Disposal by Supercritical Water Oxidation(SCWO)

作　　者：赵保国[1] 刘玉存[1] 常双君[1] 

机构地区：[1]中北大学化工与环境学院,山西太原030051

出　　处：《火炸药学报》2007年第2期71-74,共4页Chinese Journal of Explosives & Propellants

基　　金：教育部科学技术研究项目(200512)

摘　　要：在间歇式反应器中研究了二硝基甲苯(DNT)废水的非催化超临界水氧化,考察了有机物在超临界水中的氧化降解效率。对处理后的水样进行COD测定及液相色谱检测,对气体样品进行定性显色分析。发现在温度600℃、压力25MPa、停留时间30s左右时,DNT在超临界水中有很好的氧化去除效果(处理后的水样化学需氧量CODCr达28mg/L左右且无有害气体产生)。研究了含DNT废水COD的去除率与反应温度、时间和压力的关系,确定了氧化降解的影响因素和最佳降解条件。结果表明:超临界水氧化法几乎可完全去除DNT;在超临界和氧量充足的条件下,反应温度、停留时间是影响COD去除率的重要因素。The non-catalytic supercritical water oxidation （SCWO） of DNT waster water was studied in an intermittent reactor. The oxidation decomposition efficiency of organic compounds in supercritical water was investigated. The treated water samples were determined by COD and detected with HLPC, and gas samples were analyzed with qualitatively color. Under the conditions of residence time 30 s,600℃ and 25MPa pressure or so, the SCWO is efficient for disposal of explosive waste water containing DNT （COD. of treated water samples reached 28 mg/L,and without harmful gases）. The relationship between reaction duration, pressure, temperature and the removal efficiency of DNT in explosives waste water was investigated. The impact degree and optimum condition of the oxidation decomposition were determined. The results show that the supercritical water oxidation can remove DNT mostly. Under the conditions of supercriticality and rich oxygen, the reaction temperature and duration are the principal factors affecting the removal of COD.

关 键 词：物理化学 超临界水 二硝基甲苯 氧化 化学需氧量 废水处理 

分 类 号：X703.1[环境科学与工程—环境工程]