超临界水氧化法处理糖蜜酒精废液的研究  

Study on supercritical water oxidation in treating molasses alcohol wastewater

作　　者：陈孟林[1] 吴颖瑞 何星存[1] 唐明明[2] 刘葵[2] 

机构地区：[1]广西师范大学资源与环境学院,广西桂林541004 [2]广西师范大学化学化工学院,广西桂林541004

出　　处：《现代化工》2006年第z1期135-138,共4页Modern Chemical Industry

基　　金：广西青年科学基金资助项目(0135031)

摘　　要：利用间歇高压反应釜,对超临界水氧化法处理糖蜜酒精废液的过程和动力学进行了研究,结果表明适宜的氧气供应量为理论需氧量的4～6倍;CODCr去除率随着反应温度和反应时间的增加而提高,但反应时间超过10 min后,CODCr去除率的提高变得很缓慢;提高反应温度是提高废液最终处理深度的有效方法;废液CODCr的去除动力学可用三阶段动力学模型来描述,CODCr和氧气的反应级数分别是1和0,每段内的反应速率常数与温度的关系符合Arrhenius公式;在400℃下反应15 min,CODC,去除率在99.93%以上.The tests for the treatment of molasses alcohol wastewater by supercritical water oxidation(SCWO) were carried out in a batch reactor.The kinetics of the COD_(Cr) removal and the influences of O_2 partial pressure,reaction temperature and reaction time on the SCWO were studied.The results indicate that the proper O_2 supply is 4-6 times of the theoretical required amount.The removal rate of COD_(Cr) increases with the increasing of reaction temperature and reaction time,but it is not significant when the reaction time exceeds 10 minutes,increasing the reaction temperature is useful to improve the final removal rate of COD_(Cr).The kinetics of the COD_(Cr) removal can be described by three-step reaction kinetic model which is one in COD_(Cr) and zero in oxygen by reaction order.The relationship between the rate constant and reaction temperature can be satisfactorily described as Arrhenius law.The removal rate of COD_(Cr) can be over 99.93% after reacting for 10 min at 400℃.

关 键 词：超临界水氧化 糖蜜酒精废液 动力学 

分 类 号：X703.1[环境科学与工程—环境工程] X797