乙烯废碱液的ZnO沉淀法脱硫过程优化与动力学研究  

Optimization and Kinetics of ZnO Precipitation Process for Desulfurization of Spent Lye from Ethylene Plant

作　　者：刘建龙[1] 杨红健[1] 侯凯湖[1] 

机构地区：[1]河北工业大学化工学院,天津300130

出　　处：《化工环保》2010年第1期20-23,共4页Environmental Protection of Chemical Industry

基　　金：天津市科技支撑重点项目(08ZCKFSH01200)

摘　　要：采用ZnO沉淀法对乙烯废碱液进行脱硫,通过正交实验确定的最佳工艺条件为:反应温度80～85℃,n(ZnO)∶n(Na2S)=0.9,反应时间150min。在上述最佳工艺条件下,废碱液脱硫率和ZnS质量分数可分别达88%和95%以上。动力学研究结果表明,ZnO沉淀法的脱硫速率可用简化的Na2S浓度的幂函数模型描述,该模型的Na2S转化率计算值与实验值吻合良好。The ZnO precipitation process was used to remove S2-from spent lye from ethylene plant. The optimum process conditions determined by orthogonal experiments are as follows:reaction temperature 80-85 ℃,n(ZnO):n(Na2S)=0.9,reaction time 150 min. Under these conditions,the desulfurization rate of the spent lye and the mass fraction of ZnS are more than 88% and 95% respectively. The kinetics study results indicate that the desulfurization rate of the ZnO precipitation process can be described as a simplified power functional model with Na2S concentration,and the computed value of Na2S conversion is in good agreement with the experimental result.

关 键 词：废碱液 脱硫 硫化锌 过程优化 动力学 废水处理 

分 类 号：X703.1[环境科学与工程—环境工程]