污水系统污油分析及对策研究

发布时间：2018-05-30 03:10

本文选题：污油 + 硫化亚铁　；参考：《东北石油大学》2015年硕士论文

【摘要】：近年来油田采出液处理设施中,出现了带有黑色固体颗粒的污油,这部分污油占据采出液及含油污水处理装置中的大量分离空间,使原油脱水以及含油污水处理设施的效率显著下降,电脱水器中电场不稳定,必需控制污油中杂质含量。本文主要是定性分析联合站污水沉降罐污油、污水回收池中污油、污水中沉淀物的Ca2+、Mg2+、Cu2+、Fe2+、S2-等离子成分。采用原子吸收分光光度法对镁、铁离子进行定量分析。探讨了提高去除污油中杂质离子效果的机械离心分离方法。污油经过直接离心分离后,铁离子去除率在40%~50%之间,镁离子去除率60%~70%。污油经石油醚稀释后再离心分离处理,残留的铁、镁离子均大幅减少,尤其铁离子减少幅度很大,铁离子去除率在75.4%~82.9%之间,镁离子去除率达到80%以上。污油的粘度和密度对机械离心分离脱除污油金属离子杂质影响很大,应采取可行的措施来降低污油密度或粘度,以提高金属杂质脱除效果。以去离子水和模拟大庆地层离子水为溶剂,通过测量硫化亚铁与驱油剂混合前后的电导率的变化情况,及硫化亚铁的悬浮性,进一步反映常用驱油剂对胶态硫化亚铁颗粒的影响。实验证明聚驱、聚表二元驱驱油剂与地层离子的相互作用不同。三元复合、二元复合驱驱油剂与地层离子的相互作用基本一致。
[Abstract]:In recent years, sewage oil with black solid particles has appeared in the oil field production liquid treatment facility, which occupies a large amount of separation space in the produced liquid and oily sewage treatment plant. The efficiency of crude oil dehydration and oily sewage treatment facilities is obviously decreased, and the electric field in the electric dehydrator is unstable, so it is necessary to control the impurity content in the polluted oil. In this paper, the main qualitative analysis of sewage settling tank sewage oil, sewage recovery tank sewage oil, sewage sediment Ca2 Mg2 / Cu2 / Fe2 / S2- plasma composition. The magnesium and iron ions were quantitatively analyzed by atomic absorption spectrophotometry. The method of mechanical centrifugal separation was discussed to improve the effect of removing impurity ions in waste oil. After direct centrifugation, the removal rate of iron ion is between 40% and 50%, and the removal rate of magnesium ion is 60%. After being diluted by petroleum ether, the residual iron and magnesium ions were greatly reduced, especially the iron ion removal rate was between 75.4% and 82.9%, and the magnesium ion removal rate was more than 80%. The viscosity and density of contaminated oil have a great influence on the removal of metal ion impurities from contaminated oil by mechanical centrifugation. Some feasible measures should be taken to reduce the density or viscosity of contaminated oil in order to improve the removal effect of metal impurity. With deionized water and simulated Daqing formation ionic water as solvent, the change of electric conductivity and the suspension of ferrous sulfide before and after the mixing of ferrous sulfide and oil displacement agent were measured. The effect of common oil displacement agents on colloidal ferrous sulfide particles is further reflected. It is proved by experiments that the interaction between polymer flooding and formation ions is different. The interaction between ternary flooding agent and formation ions is basically consistent.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X741

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