钻井污水悬浮液的气浮处理研究  

Study of air flotation for treatment of drilling wastewater

作　　者：马逍 陈建义 迟浩迪 张忠智 张志勇 MA Xiao;CHEN Jian-yi;CHI Hao-di;ZHANG Zhong-zhi;ZHANG Zhi-yong(State Key Laboratory of Heavy Oil Processing,China University of Petroleum,Beijing Key Laboratory of Process Fluid Filtration and Separation,Beijing 102249,China)

机构地区：[1]中国石油大学,重质油国家重点实验室,过程流体过滤与分离技术北京市重点实验室,北京102249

出　　处：《中国环境科学》2023年第8期4032-4037,共6页China Environmental Science

基　　金：国家重点研发计划项目(2019YFC1804102)。

摘　　要：为了实现钻井污水的达标外排或回注,通过气浮法考察了停留时间和气泡直径对钻井污水化学需氧量(COD)和悬浮物(SS)的去除效果,并重点分析了粒级效率.结果表明,气浮停留时间30min的条件下,钻井污水COD去除率可稳定在90%左右,SS去除率可稳定在94%左右;气泡粒度分布与悬浮物颗粒粒度分布重合度越高,COD和SS去除率越高;气浮可有效去除直径20μm以上的悬浮物,且粒级效率曲线呈“鱼钩”状.To realize the standard discharge or reinjection of drilling wastewater,the effect of retention time and air bubble diameter on the removal efficiency of chemical oxygen demand(COD)and suspended solids(SS)was investigated by air flotation,and a focused analysis of the fractional efficiency curve.The results showed that the removal efficiency of COD and SS could be stabilized at 90% and 94% respectively with a retention time of 30minutes.The highest removal efficiency of COD and SS was obtained when the particle size distribution of suspended solids and air bubbles coincide.Suspended solids larger than 20μm could be effectively removed and the fractional efficiency curve appeared fish-hook phenomenon.

关 键 词：气浮 钻井污水 粒度分布 粒级效率 

分 类 号：X703.5[环境科学与工程—环境工程]