超临界水氧化处理核电厂去油污溶剂及反应动力学分析  

Treatment and Reaction Kinetic Analysis of Waste Solvent From Nuclear Power Plants by Supercritical Water Oxidation

作　　者：袁誉坤 尹宇发宁 舒睿 林鹏 汪栋 刘夏杰 李坤锋 李丽丽 YUAN Yu-kun;YINYU Fa-ning;SHU Rui;LIN Peng;WANG Dong;LIU Xia-jie;LI Kun-feng;LI Li-li(China Nuclear Power Technology Research Institute Co.,Ltd,Shenzhen 518028,China)

机构地区：[1]中广核研究院有限公司,广东深圳518028

出　　处：《核化学与放射化学》2020年第3期192-197,I0005,共7页Journal of Nuclear and Radiochemistry

摘　　要：采用超临界水氧化技术对核电厂去油污溶剂进行处理,控制不同的过氧系数、停留时间、反应温度和反应压力等实验条件,研究各参数对产水的化学需氧量(COD)及化学需氧量去除率的影响。结果表明:装置的最佳处理条件为过氧系数1.2、停留时间45s、反应温度450℃、反应压力22.5MPa,有机废液的COD去除率可达到99.8%以上。对核电厂有机废液的超临界水氧化反应动力学规律进行了研究,在22.5MPa下,反应活化能Ea=(24.64±1.25)kJ/mol,频率因子k0=2.38s-1,动力学模型计算值和实验值的误差在±7%以内。Supercritical water oxidation(SCWO)is applied to treat waste solvent from nuclear power plants.The effects of peroxide coefficient,reaction time,temperature and pressure on the treatment of waste solvent from nuclear power plants are investigated.The result shows the equipment has the best treatment effect under the conditions of peroxide coefficient 1.2,reaction time 45s,temperature 450℃,pressure 22.5MPa,and the COD degradation rate is up to 99.8%.The kinetic laws of supercritical water oxidation reaction of waste solvent from nuclear power plants are discussed.At 22.5MPa,the value of activation energy is(24.64±1.25)kJ/mol,the frequency factor is 2.38s-1.The deviation between calculation and experimental values is within±7%.

关 键 词：核电厂去油污溶剂 超临界水氧化技术 过氧系数 COD 反应动力学 

分 类 号：TL941[核科学技术—辐射防护及环境保护]