三维电极法处理煤化工气化废水  

Treatment of gasification wastewater from coal chemical industry by three-dimensional electrode method

作　　者：李程 王敬楠 崔新安 LI Cheng;WANG Jingnan;CUI Xin’an(Luoyang R&D Center of Technology,Sinopec Engineering(Group)Co.,Ltd.,Luoyang 471003,China)

机构地区：[1]中石化炼化工程(集团)股份有限公司洛阳技术研发中心,河南洛阳471003

出　　处：《化工环保》2024年第3期371-376,共6页Environmental Protection of Chemical Industry

基　　金：中国石油化工股份有限公司项目(19142A420)。

摘　　要：以某煤化工厂的气化废水为研究对象,采用三维电极法对其进行处理,通过静态实验考察了反应时间、极板间电压对气化废水污染物脱除效果和处理能耗的影响,通过动态实验考察了在连续流动状态下污染物的脱除效果。实验结果表明:在静态条件下,确定最佳反应时间为30 min、最佳极板间电压为40 V,该条件下的耗电量为15.0 kW·h/t(以废水计),气化废水中Ca^(2+)、Mg^(2+)、F^(-)、COD、氨氮的脱除率分别可达77.5%、82.7%、94.2%、81.6%、79.9%,较二维电极法的10.4%、11.7%、11.1%、8.3%、9.5%大幅提升;在动态条件下处理气化废水60 min后,出水中Ca^(2+)、Mg^(2+)、F^(-)、COD、氨氮的脱除率分别为80.7%、77.0%、88.1%、84.9%、86.4%。The gasification wastewater from a coal chemical plant was taken as the research object and treated with the three-dimensional electrode method.The effects of reaction time and voltage between the electrodes on the pollutant removal efficiency and treatment energy consumption of gasification wastewater were investigated through static experiments.The pollutant removal efficiency under a continuous flow state was also investigated through dynamic experiments.The experimental results show that under static conditions,the optimal reaction time is determined to be 30 min,and the optimal voltage between electrodes is 40 V.The power consumption under these conditions is 15.0 kW·h/t(calculated as wastewater).The removal rates of Ca^(2+),Mg^(2+),F^(-),COD,and ammonia nitrogen in gasification wastewater can reach 77.5%,82.7%,94.2%,81.6%,and 79.9%,respectively,which is significantly higher than the 10.4%,11.7%,11.1%,8.3%,and 9.5%of the two-dimensional electrode method.After gasification wastewater is treated under dynamic conditions for 60 min,the removal rates of Ca^(2+),Mg^(2+),F^(-),COD,and ammonia nitrogen in the effluent are 80.7%,77.0%,88.1%,84.9%,and 86.4%,respectively.

关 键 词：三维电极 煤化工 气化废水 废水处理 

分 类 号：X783[环境科学与工程—环境工程]