超临界水氧化DNT废水动力学及影响因素研究  

Kinetics and Influence Factors of Dinitrotoluene Wastewater Oxidation in Supercritical Water

作　　者：赵保国[1] 刘玉存[1] 耿鹏印 罗文浩[1] 

机构地区：[1]中北大学化工与环境学院,山西太原030051 [2]河北高清环保科技有限公司,河北石家庄050000

出　　处：《含能材料》2008年第4期406-409,共4页Chinese Journal of Energetic Materials

基　　金：教育部科学技术研究项目(2004020);太原市科技兴市专项项目(20061046)

摘　　要：采用半连续化的超临界水氧化装置处理了二硝基甲苯（DNT）炸药废水，发现DNT去除率及其化学需氧量（COD）去除率随温度升高、停留时间延长而提高。在550℃、20s、24MPa、过氧量300％的条件下，DNT去除率和COD去除率分别能达98．89％、98．99％。而在425～550℃、时间0～20s范围内，温度、时间对DNT去除率及COD去除率影响显著。在425～550℃、24MPa、过氧量300％条件下，DNT反应级数为3．630，反应活化能为24．19kJ·mol^-1，指前因子为7．109×10^5s^-1。The dlnitrotoluene （DNT） wastewater treatment was investigated in a semi-continuous supercritical water oxidation system with the temperatures from 425 ℃ to 570 ℃ and the resident time from 0 s to 60 s at 24 MPa and 300% excess oxygen. Results show that increasing temperature and resident time can increase the DNT and chemical oxygen demand （COD） removal efficiencies. Treatment for approximately 20 s at a pressure of 24 MPa, temperature of 550 ℃ and oxygen excess of 300% , results in destruction efficiencies of over 98.89% for DNT and 98.99% for COD. The DNT and COD removal efficiencies are strongly dependent on temperature and resident time during 425 - 550 ℃ and 0 - 20 s. Under the treatment condition of 425 - 550 ℃ , 24 MPa and 300% excess oxygen, the reaction order respect to DNT is 3. 630, the activation energy is 24. 19 kJ · mol^-1, and the Arrhenius pre-exponential factor is 7. 109 × 10^5 s^-1.

关 键 词：物理化学 二硝基甲苯(DNT) 超临界水 火炸药 反应动力学 废水处理 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术]