臭氧微纳米气泡技术处理油气田钻井废水的试验研究  

Experimental study on treatment of drilling engineering wastewater by ozone micro-nano bubble technology for oil and gas fields

作　　者：王瑞琦 吉永忠 兰清泉 WANG Ruiqi;JI Yongzhong;LAN Qingquan(Nanjing Tianqi Advanced Oxidation Co.,Ltd.;CNPC Chuanqing Drilling Engineering Co.,Ltd.)

机构地区：[1]南京天祺超氧科技有限公司 [2]中国石油川庆钻探国际工程公司

出　　处：《环境工程技术学报》2024年第4期1151-1157,共7页Journal of Environmental Engineering Technology

摘　　要：随着清洁化生产的深入推进和环保意识的提高,对作业现场的钻井废水及其处理方式的要求越来越严格。针对钻井废水稳定性高、化学需氧量(COD)高、色度高、降解难的特点,采用微纳米气泡技术以提高气体利用率和传质效果,结合臭氧对难降解的高浓度有机污染物进行降解。室内模拟试验表明,经过预处理后再采用臭氧微纳米气泡技术处理,COD从47328 mg/L降至131 mg/L,去除率达到99.7%,TOC从15146 mg/L降至65.2 mg/L,去除率达到99.6%,COD和TOC的去除率均超过99.5%,臭氧微纳米气泡技术对高色度和高COD具有显著的去除效果。采用絮凝沉淀、芬顿工艺配合臭氧微纳米气泡技术能够降低臭氧投加量,从而降低投资和运行成本,是一种经济高效的处理方法。As the"blood"of drilling engineering in petroleum industry,drilling fluid plays a very important role in the process of oil and gas exploration and development.At the job site,drilling fluid is also an important source of drilling wastewater.With the further promotion of cleaner production and the improvement of environmental awareness,the requirements of drilling wastewater and its treatment on the job site have become more and more stringent.In response to the characteristics of good stability,high chemical oxygen demand and difficult degradation of drilling wastewater,micro-nano bubbles were used to improve gas utilization and mass transfer effect,and ozone gas was used to degrade high-difficulty and high-concentration organic matter.The aim was to solve the problems of high chromaticity and high COD of drilling wastewater.The indoor simulation experiment showed that after pretreatment,by using ozone micro-nano bubble technology,COD decreased from 47328 mg/L to 131 mg/L,with the removal rate of 99.7%,and TOC decreased from 15146 mg/L to 65.2 mg/L,with the removal rate of 99.6%.The removal rates of COD and TOC could reach more than 99.5%,and the ozone micro-nano bubble technology had a significant removal effect on high chromaticity and high COD.The experiment also showed that the flocculation precipitation and Fenton process combined with ozone micro-nano bubble technology could reduce the amount of ozone added,thereby reducing the investment and operating costs,making it an economical and efficient treatment method.

关 键 词：臭氧 微纳米气泡 钻井废水 高浓度有机物 高难度有机物 零排放 高级氧化 

分 类 号：X703[环境科学与工程—环境工程]