基于高级氧化技术的压裂返排液达标处理研究
Research on Standard Treatment of Fracturing Flowback Fluid Based on Advanced Oxi-dation Technology
田姣 1杨红锐 1任亚春 1王伟龙 1陈寿1
作者信息
- 1. 中国石油天然气集团有限公司长庆油田分公司第二采油厂
- 折叠
摘要
基于高效低成本达标处理压裂返排液的要求,分别研究了高压脉冲、臭氧、芬顿(Fenton)氧化等单一高级氧化技术对废液的处理效果,考察了联合工艺的最佳反应条件,并用于现场进行长期效果评价.结果表明:单一技术中高压脉冲的处理效果最好,Fenton氧化和臭氧氧化的效果次之,单一技术无法满足GB 18918-2002《城镇污水处理厂污染物排放标准》的要求,采用高压脉冲-臭氧和高压脉冲-Fenton氧化联合工艺的出水水质满足标准要求,其一段工艺的最佳条件为脉冲电压30 kV、脉冲宽度60 ns、脉冲频率100 Hz、臭氧投加量1.5 g/h、初始pH值为7、臭氧通入时间 30 min;二段工艺的最佳条件为脉冲电压 30 kV、脉冲宽度 60 ns、脉冲频率100 Hz、初始pH值为 5;通过 50天的长期效果实验,油、悬浮物、COD、氮氨的去除效果较好,联合工艺对进水水质波动具有很好的适应能力.
Abstract
Based on the requirements of high-efficiency and low-cost standard treatment of fracturing flowback fluid,the treatment effects of single advanced oxidation technologies such as high-voltage pulse,ozone,and Fenton oxidation on waste fluid is studied respectively.The optimal reaction condi-tions of the combined process are investigated,and the combined process is used for long-term evalua-tion on site.The results show that the treatment effect of high-voltage pulse is the best in single tech-nology,followed by Fenton oxidation and ozone oxidation.The single technology cannot meet the re-quirements of GB 18918-2002"Pollutant Discharge Standards for Urban Wastewater Treatment Plants".The effluent water quality of the combined high-voltage pulse-ozone and high-voltage pulse-Fenton oxidation processes meets the requirements of the standard.The optimal conditions of the first-stage process are pulse voltage of 30 kV,pulse width of 60 ns,pulse frequency of 100 Hz,ozone dosage of 1.5 g/h,initial pH value of 7,ozone inlet time of 30 min.The optimal conditions of the two-stage process are pulse voltage of 30 kV,pulse width of 60 ns,pulse frequency of 100 Hz,and initial pH value of 5.Through the long-term effect experiment for 50 days,the removal effect of oil,suspended matter,COD,and nitrogen ammonia is good.The combined process has a good adaptability to the fluctuation of inlet water quality.
关键词
高级氧化/高压脉冲/臭氧/Fenton/压裂返排液/外排Key words
advanced oxidation/high-voltage pulse/ozone/Fenton/fracturing flowback fluid/dis-charge引用本文复制引用
出版年
2024
NETL
NSTL
万方数据