基于ABR生物反应器三元复合驱采出水处理效能研究

发布时间：2018-01-17 12:53

本文关键词：基于ABR生物反应器三元复合驱采出水处理效能研究　出处：《东北林业大学》2015年硕士论文　论文类型：学位论文

【摘要】：目前大庆油田进入三次采油阶段,由于三元复合驱采油技术的大面积推广应用,大量的三元复合驱采出水随之产生。油田三元复合驱采出水的组成复杂,主要包括未分离的原油、悬浮固体、聚合物、碱、表面活性剂和化学药剂等。大量残留的化学药剂导至采出水油水分离困难且乳化严重,常规的物理及化学方法处理三元复合驱采出水效率不高而且耗费成本较高。针对上述情况生物法处理油田采出水的研究应运而生,在取得了较好的处理效果同时大大降低了处理成本。生物法处理油田采出水是根据微生物能够利用三元采出水中的一些有机物质作为自身生长的营养基质,在微生物生长繁殖过程中逐步将其分解代谢从而完成对三元采出水的处理净化。本研究针对大庆油田三元复合驱采出水的特点,采用厌氧折流板反应器(anaerobic baffled reactor ABR)生物处理工艺对其进行处理。研究表明,在反应器稳定驯化驱油菌群的30d后,随着反应器的稳定运行,水力停留时间由最初72h逐步缩短至24h,提高了反应器处理效率。弱碱三元复合驱采出水经过100d稳定处理后,原水含油去除效率高达99.80%,悬浮固体去除率94.40%,,聚合物去除率7.00%,粘度下降20.00%,表面活性剂去除率50.00%,总碱度去除率16.00%；强碱三元复合驱采出水经过60d稳定处理后,原水含油除率98.50%,悬浮固体去除率96.50%,聚合物去除率为28.80%,粘度下降20.00%,表面活性剂去除率62.30%,总碱度去除率34.80%；弱碱井口三元水经过30d稳定处理后,原水含油去除率99.20%,悬浮固体去除率89.50%,聚合物去除率21.90%,粘度下降30.40%,表面活性剂去除率53.80%,总碱度去除率为15.50%。北二西弱碱三原站出水经双柱状过滤反应器过滤后悬浮固体含量下降至25.60mg/L,含油量下降至3.50mg/L,原水加聚合氯化铝絮凝预处理后过滤效果更佳。
[Abstract]:At present, Daqing Oilfield has entered the stage of tertiary oil recovery. Due to the extensive application of ASP flooding technology, a large number of ASP flooding produced water has been produced, and the composition of ASP flooding produced water in oilfield is complex. It mainly includes crude oil, suspended solid, polymer, alkali, surfactant and chemical agent, etc. A large number of residual chemicals are difficult to separate from oil and water in the produced water and emulsified seriously. Conventional physical and chemical methods to treat ASP flooding produced water efficiency is not high and high cost. In view of the above situation biological treatment of oilfield produced water research emerged as the times require. Biological treatment of oilfield produced water is based on the ability of microbes to use some organic substances in ternary produced water as the nutrient substrate for their own growth. In the process of microbial growth and reproduction, it is gradually decomposed and metabolized so as to complete the treatment and purification of ternary produced water. This study aims at the characteristics of ternary flooding produced water in Daqing Oilfield. Anaerobic baffle reactor (ABR) was used to treat anaerobic baffled reactor. After 30 days of stable acclimation, the HRT was gradually shortened from 72 h to 24 h with the stable operation of the reactor. After 100 days of stable treatment, the oil removal efficiency of raw water is as high as 99.80 and the removal rate of suspended solid is 94.40, respectively. The removal rate of polymer is 7.00, the viscosity decreases 20.00%, the removal rate of surfactant is 50.00g, the removal rate of total alkalinity is 16.00; After 60 days of stable treatment, the oil removal rate, suspended solid removal rate and polymer removal rate of raw water are 98.50, 96.50 and 28.80% respectively. Viscosity decreased 20.00%, surfactant removal rate 62.30, total alkalinity removal rate 34.80%; After 30 days of stable treatment, the removal rate of oil in raw water is 99.20, the removal rate of suspended solid is 89.50, the removal rate of polymer is 21.90, and the viscosity of raw water is decreased by 30.40%. The removal rate of surfactant was 53.80 and the removal rate of total alkalinity was 15.50. The suspended solids content in the effluent of the North Erxi weak Alkali III Station was reduced to 25.60 mg / L after being filtered by a double-column filter reactor. The oil content decreased to 3.50 mg / L, and the filtration effect was better after flocculation pretreatment of raw water and polyaluminium chloride.
【学位授予单位】：东北林业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X741

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