二氧化氯治理过渡层技术实验研究

Experimental Study on Transition Layer Treatment with Chlorine Dioxide

过渡层是油水分离过程中产生的一种有害物质,对原油脱水系统和污水处理系统具有很大影响,能够导致电脱水器电流升高、跨电场等严重后果。为了保障原油脱水系统平稳运行,开展了过渡层治理技术研究。通过对过渡层物性和成因分析可知,沥青质及胶质的乳化作用、FeS等固体颗粒的促进作用、聚合物的强化作用是形成过渡层的重要原因,其中FeS等固体颗粒是形成稳定过渡层的主要原因。利用FeS的不稳定性,采用氧化剂二氧化氯对过渡层进行处理,通过单因素实验和正交实验,确定了浓度、温度及反应时间等运行参数。在二氧化氯加药质量浓度190 mg/L、反应温度55℃、反应时间5 h条件下,能够对过渡层进行有效处理,脱水率达到99.45%。

Transition layer is a kind of harmful substance produced during the process of oil-water separation,which can greatly influence the crude oil dehydration system and the sewage treatment system,resulting in serious consequences such as electricity increasing and electric field crossing. To secure the smooth running of crude dehydration system,the study of the transition layer treatment technology is carried out. Through analyzing the physical property and causes of the transition layer,it is known that the emulsification of asphaltene and colloid,the acceleration of solid particles like Fe S,and the reinforcement of polymer,and among them solid particles like Fe S are the main reasons for the formation of the stable transition layer. Using the instability of Fe S,the oxidizing agent chlorine dioxide is used to deal with transition layer. By the single factor experiment and the orthogonal experiment,operation parameters such as concentration,temperature and reaction time are confirmed. When the drug mass concentration of chlorine dioxide is 190 mg/L, reaction temperature is 55 ℃, and reaction time is 5 hours, the technology can effectively deal with the transitional layer, and its dehydration reaches99.45%.