基于三维电极法的钻井废水处理研究

发布时间：2018-04-26 12:26

本文选题：钻井废水 + 混凝　；参考：《西南石油大学》2015年硕士论文

【摘要】：石油和天然气工业的开发过程中会产生大量的钻井废水,其中含有大量油类、重金属离子、难降解有机物、氯化物等有毒有害物质,如果不经处理直接排放到环境中,将会对人类的生活、生产造成严重危害。本文以取自磨溪的某钻井废水为处理对象,通过混凝+三维电极法进行处理,为了进一步强化处理效果,在三维电极系统中加入Fenton试剂,探索最佳混凝剂种类及其混凝条件；同时探索将活性碳纤维(ACF)用于三维电极系统中第三极材料的处理效果；分析ACF-三维电极法处理该钻井废水的最佳工艺条件及加入Fenton试剂后的条件优化及其处理效果。通过混凝实验确定出最佳混凝剂为硫酸铝,最佳助凝剂为非离子型聚丙烯酰胺。最佳混凝条件为：pH值为9,硫酸铝加量9g/L,非离子型聚丙烯酰胺加量为10mg/L,在此条件下CODcr去除率为65.4%,脱色率为90%。将活性碳纤维和颗粒活性炭(GAC)分别作吸附剂和三维电极系统的第三极材料用于处理钻井废水,对比其处理效果。结果表明：ACF比GAC更适合作第三极材料。通过正交实验得到ACF-三维电极法处理钻井废水的最佳条件为：初始CODcr为1000mg/L, pH值为5,电流密度为31.8mA/cm2,曝气量为0.8L/min,电解时间为60min,该最优条件下的CODcr去除率达40.3%,ACF-三维电极法去除钻井废水的CODcr的反应过程遵从一级反应动力学,其宏观动力学方程为：CODcr=Co*e-(0.00834+0.00585)。加入Fenton试剂的三维电极系统最佳c(H2O2)/c(Fe2+)为13.6,最佳Fenton试剂加量(c(H2O2)+c(Fe2+))为70.1mmol/L,在此条件下,钻井废水的CODcr去除率可达72.5%、TOC去除率为45.4%。三维电极-Fenton试剂法去除钻井废水的CODcr的反应过程遵从一级反应动力学,其宏观动力学方程为：CODCr=Co*e-(0.01984t+0-01468)。
[Abstract]:During the development of the petroleum and natural gas industry, a large amount of drilling wastewater will be produced, which contains a large amount of oil, heavy metal ions, refractory organic compounds, chlorides and other toxic and harmful substances, which are discharged directly into the environment without treatment. Will cause serious harm to human life and production. In this paper, a drilling wastewater from Moxi was treated by coagulation three-dimensional electrode method. In order to further strengthen the treatment effect, Fenton reagent was added to the three-dimensional electrode system to explore the best coagulant types and coagulation conditions. At the same time, the application of activated carbon fiber (ACFC) to the treatment of the third electrode material in the three-dimensional electrode system was explored, and the optimum process conditions of the treatment of the drilling wastewater by the ACF-3D electrode method and the optimization of the conditions after the addition of Fenton reagent and the treatment effect were analyzed. The best coagulant is aluminum sulfate and the best coagulant is non-ionic polyacrylamide. The optimum coagulation conditions were as follows: pH 9, aluminum sulfate 9 g / L, Nonionic polyacrylamide 10 mg / L, CODcr removal rate 65.4% and decolorization rate 90%. Activated carbon fiber (ACF) and granular activated carbon (GAC) were used as the adsorbent and the third electrode material in the three dimensional electrode system respectively to treat drilling wastewater. The results show that: ACF is more suitable for the third pole than GAC. The optimum conditions for treatment of drilling wastewater by ACF-3D electrode method are as follows: initial CODcr is 1000mg / L, pH is 5, current density is 31.8 Ma / cm ~ 2, aeration rate is 0.8L / min, electrolysis time is 60min. Under the optimal condition, the removal rate of CODcr is 40.3% ACF-3D electrode. The reaction process of CODcr removal from drilling wastewater follows the first-order reaction kinetics. The macroscopic kinetic equation is: 1: CODCRE CODCRE CODCRE (0.00834 0.00585). The optimum c(H2O2)/c(Fe2 of three-dimension electrode system with Fenton reagent is 13.6, and the optimum Fenton reagent dosage is 70.1 mmol / L). Under these conditions, the CODcr removal rate of drilling wastewater can reach 72.5% and 45.4%. The removal of CODcr from drilling wastewater by three-dimensional electrode Fenton reagent method followed the first-order reaction kinetics. The macroscopic kinetic equation of the reaction was: 1 / CODCr-Coe-Nine 0.01984t 0-01468.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X741

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