非均相催化臭氧化处理钻井废水的研究  

Study on the Treatment of Drilling Wastewater by Heterogeneous Catalytic Ozonation Process

作　　者：陈丹丹[1] 王波 袁增[3] 唐郭璇 王海琼 郑婉莹 Chen Dandan;Wang Bo;Yuan Zeng;Tang Guoxuan;Wang Haiqiong;Zheng Wanying(College of Chemistry and Chemical Engineering of Southwest Petroleum University;Shanghai Municipal Engineering Design Institute(Group)Co.Ltd;Chongqing Gas Field of PetroChina Southwest Oil&Gas Field Company)

机构地区：[1]西南石油大学化学化工学院,四川省成都市610500 [2]上海市政工程设计研究总院(集团)有限公司 [3]中国石油西南油气田分公司重庆气矿

出　　处：《油气田环境保护》2021年第2期11-14,20,共5页Environmental Protection of Oil & Gas Fields

摘　　要：以油田钻井废水为处理对象,采用基于臭氧的非均相催化氧化处理工艺,负载了MnO_(2)催化剂强化臭氧处理效果,实验对比分析单独臭氧化和非均相催化臭氧化的处理效果差异,确定最佳工艺参数条件。X射线衍射分析表明,过量浸渍法制备的催化剂中含有大量活性组分MnO_(2),使非均相催化臭氧化去除钻井废水COD的效率提高了45.8%。经工艺优化后,确定非均相催化臭氧化处理钻井废水最佳条件为:催化剂加量50 mg/L、反应pH值为11、反应温度20℃、臭氧浓度85 mg/L、处理时间50 min,此时废水COD最大去除率为83.1%。通过5次重复实验验证,催化剂和系统稳定性几乎不受影响,出水均达到GB 8978—1996《污水综合排放标准》一级标准。Taking oilfield drilling wastewater as the treatment object,using the ozone-based heterogeneous catalytic oxidation process loaded with MnO_(2)catalyst to enhance the ozone treatment effect.The experiment compared and analyzed the difference between the treatment effect of single ozonation and heterogeneous catalytic ozonation,the optimal process parameter conditions was obtained.The X-ray diffraction results showed that the catalyst prepared by excessive impregnation method contained substantial activity fractions of MnO_(2),which increased the ozonation treatment efficiency of COD for drilling wastewater to 45.8%.After the optimization process,the optimal conditions for the treatment of drilling wastewater by heterogeneous catalytic ozonation were determined as follows:catalyst dosage of 50 mg/L,pH value of 11,temperature of 20℃,ozone concentration of 85 mg/L and processing time of 50 min,the COD removal rate was reached to 83.1%.The stability of the catalyst and the system was almost unaffected after 5 repeated experiments.The final effluent COD met the first-level standard of GB 8978—1996“Comprehensive Wastewater Discharge Standard”.

关 键 词：钻井废水 催化剂 非均相催化臭氧化 COD去除率 

分 类 号：X741[环境科学与工程—环境工程]