摘要
为确定臭氧-三维电极工艺对油田采出水的处理效果,以某联合站采出水为研究对象,通过单因素实验确定采出水化学需氧量(COD)的变化范围,利用响应曲面实验设计确定最佳工艺条件,并探讨联合工艺的协同效应和作用机理。结果表明,影响程度从大到小依次为极板间距、电流密度、活性炭填充量、臭氧曝气量;并且极板间距和电流密度、极板间距和活性炭填充量的交互影响显著;当极板间距2.9 cm、电流密度8.2 mA/cm^(2)、活性炭填充量20.5 g/L、臭氧曝气量31.2 mL/min时,COD的去除率最高为94.83%;联合工艺符合一级反应动力学方程,其速率常数远大于单独工艺速率常数的线性加和,说明两种工艺发生了协同促进效应,强化了有机物的去除速率。
In order to determine the treatment effect of ozone-three-dimensional electrode process on oilfield produced water,taking the produced water of a joint station as the research object,the variation range of chemical oxygen demand(COD)in the effluent is determined by single factor experiment.The design of response surface experiment is utilized to determine the optimal process condition and to explore the synergistic effect and mechanism of the combined process.The results show that the influence degree from large to small is plate spacing,current density,activated carbon filling and ozone aeration rate.The interaction effects between plate spacing and current density,plate spacing and activated carbon filling are significant.When the plate spacing is 2.9 cm,the current density is 8.2 mA/cm^(2),the activated carbon filling is 20.5 g/L and the ozone aeration rate is 31.2 mL/min,the COD removal rate is 94.83%.The combined process is conformed to the first-stage reaction kinetic equation whose rate constant is much higher than the linear sum of the rate constant of single process,which indicates that the two processes have synergistic promoting effect and enhances the removal rate of organic matter.
作者
卢宪辉
LU Xianhui(Petrochemical Engineering Co.,Ltd.,CNOOC)
出处
《石油石化节能与计量》
CAS
2023年第12期7-11,共5页
Energy Conservation and Measurement in Petroleum & Petrochemical Industry
关键词
臭氧
三维电极
采出水
化学需氧量
反应动力学
ozone
three-dimensional electrode
produced water
chemical oxygen demand
reaction kinetics
