三元复合驱典型化合物多相催化臭氧化及破乳效能研究
发布时间：2019-03-21 17:43
【摘要】：油田的开发方式决定着石油采收率的高低,三元复合驱(即Alkali-Surfactant-Polymer Flooding,简写为:ASP Flooding)的出现进一步提升了石油采收率。一方面摆脱了由于油田资源有限导致可供勘探的资源越来越少的限制,另一方面保证了现有的石油开采量的稳产和增产,从而缓解了社会日益增长的石油供需矛盾。然而,随着三元复合驱油的广泛运用,采出水中残留的碱、表面活性剂和聚合物等导致了油水乳化程度增加,油水分离越发困难,处理后难以达到回注水水质标准要求,增加注水井洗井次数等一系列技术问题的难度。论文研究采用多相催化臭氧法处理三元复合驱污水,利用催化剂催化臭氧产生一种化学电位高,氧化能力强,反应迅速的高效氧化剂羟基自由基(?OH),无选择性地氧化有机污染物,以达到良好的破乳和聚丙烯酰胺(PAM)去除效果。首先进行金属螯合物催化臭氧氧化特性研究,分析了金属螯合物催化臭氧的理论基础,并对其进行了可行性分析。通过选择螯合剂、检测出力系数以及确定催化剂优化配比的研究,考察了金属螯合物催化臭氧化效能。同时分析了水力停留时间(HRT)和pH值对金属螯合物催化臭氧氧化PAM效能的影响。接着进行金属螯合物催化臭氧化效能及动力学研究,分别考察了金属螯合物催化臭氧氧化PAM溶液及其附加表面活性剂的混合溶液的破乳效能影响,并进行了金属螯合物催化臭氧的可生化效能及动力学研究。研究结果表明,出力系数100%、硫酸亚铁(FeSO4)与乙二胺四乙酸(EDTA)浓度比率为1:1条件下,在HRT达到2.0h时,溶液中PAM的去除率为75%,降粘效率为64%,有机物去除和溶液破乳效果良好。同时,酸性环境不利于金属螯合物催化臭氧氧化反应,而碱性环境则反之。金属螯合物催化臭氧氧化后,PAM溶液的B/C比值从0.121提升到0.423,可生化性有所提高。此外,金属螯合物催化臭氧反应符合二级动力学反应,其氧化初始浓度在50~100 mg/L范围内的PAM溶液时,二级反应速率常数在2.20×10-4~3.05×10-4 L·(mg·min)-1之间。
[Abstract]:The development mode of oil field determines the level of oil recovery, and the appearance of ternary compound flooding (Alkali-Surfactant-Polymer Flooding, abbreviated as: ASP Flooding) further improves oil recovery. On the one hand, it gets rid of the limitation of less and less resources for exploration due to the limited resources of oil fields, on the other hand, it guarantees the steady production and increase of oil production, thus alleviating the increasing contradiction between supply and demand of oil in the society. However, with the wide application of ASP flooding, the remaining alkali, surfactant and polymer in the produced water lead to the increase of oil-water emulsifying degree, the separation of oil and water is more difficult, and it is difficult to meet the requirement of water quality standard of reinjection after treatment. It is difficult to increase the frequency of water injection well washing and a series of technical problems. In this paper, multi-phase catalytic ozone method is used to treat ternary compound flooding wastewater, and catalyst is used to catalyze ozone to produce an efficient oxidizer hydroxyl radical (? OH), which has high chemical potential, strong oxidation ability and rapid reaction. Non-selective oxidation of organic pollutants to achieve good demulsification and polyacrylamide (PAM) removal effect. Firstly, the catalytic ozonation characteristics of metal chelates were studied, the theoretical basis of metal chelates catalytic ozonation was analyzed, and the feasibility of metal chelates catalytic ozonation was analyzed. The catalytic efficiency of metal chelates for ozonation was investigated by selecting chelating agent, detecting the yield coefficient and determining the optimum ratio of catalyst. The effects of hydraulic retention time (HRT) and pH value on the catalytic activity of metal chelates for ozonation of PAM were also analyzed. Then, the catalytic efficiency and kinetics of metal chelates for ozonation of PAM solution and its mixed solution were studied, and the influence of metal chelates on demulsifying efficiency of ozonation solution and its mixed solution was investigated. The biochemical efficiency and kinetics of ozone catalyzed by metal chelates were studied. The results showed that the removal rate of PAM and viscosity reduction efficiency were 75% and 64% under the conditions of output coefficient 100%, concentration ratio of ferrous sulfate (FeSO4) to ethylenediaminetetraacetic acid (EDTA) being 1:1 and HRT reaching 2.0 h. The removal of organic matter and demulsification of solution are good. At the same time, acidic environment is not favorable for metal chelates to catalyze ozonation reaction, but alkaline environment is opposite. After ozonation catalyzed by metal chelates, the B / C ratio of PAM solution was increased from 0.121 to 0.423, and the biodegradability was improved. In addition, the reaction of ozone catalyzed by metal chelates conforms to the second order kinetic reaction, and the rate constant of the second order reaction is between 2.20 脳 10 ~ (4) 4 L (mg 路min and 3.05 脳 10 ~ (5) L (mg 路min) when the initial concentration of PAM is in the range of 50 脳 100 mg/L.
【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】：TE357.46
本文编号：2445167
[Abstract]:The development mode of oil field determines the level of oil recovery, and the appearance of ternary compound flooding (Alkali-Surfactant-Polymer Flooding, abbreviated as: ASP Flooding) further improves oil recovery. On the one hand, it gets rid of the limitation of less and less resources for exploration due to the limited resources of oil fields, on the other hand, it guarantees the steady production and increase of oil production, thus alleviating the increasing contradiction between supply and demand of oil in the society. However, with the wide application of ASP flooding, the remaining alkali, surfactant and polymer in the produced water lead to the increase of oil-water emulsifying degree, the separation of oil and water is more difficult, and it is difficult to meet the requirement of water quality standard of reinjection after treatment. It is difficult to increase the frequency of water injection well washing and a series of technical problems. In this paper, multi-phase catalytic ozone method is used to treat ternary compound flooding wastewater, and catalyst is used to catalyze ozone to produce an efficient oxidizer hydroxyl radical (? OH), which has high chemical potential, strong oxidation ability and rapid reaction. Non-selective oxidation of organic pollutants to achieve good demulsification and polyacrylamide (PAM) removal effect. Firstly, the catalytic ozonation characteristics of metal chelates were studied, the theoretical basis of metal chelates catalytic ozonation was analyzed, and the feasibility of metal chelates catalytic ozonation was analyzed. The catalytic efficiency of metal chelates for ozonation was investigated by selecting chelating agent, detecting the yield coefficient and determining the optimum ratio of catalyst. The effects of hydraulic retention time (HRT) and pH value on the catalytic activity of metal chelates for ozonation of PAM were also analyzed. Then, the catalytic efficiency and kinetics of metal chelates for ozonation of PAM solution and its mixed solution were studied, and the influence of metal chelates on demulsifying efficiency of ozonation solution and its mixed solution was investigated. The biochemical efficiency and kinetics of ozone catalyzed by metal chelates were studied. The results showed that the removal rate of PAM and viscosity reduction efficiency were 75% and 64% under the conditions of output coefficient 100%, concentration ratio of ferrous sulfate (FeSO4) to ethylenediaminetetraacetic acid (EDTA) being 1:1 and HRT reaching 2.0 h. The removal of organic matter and demulsification of solution are good. At the same time, acidic environment is not favorable for metal chelates to catalyze ozonation reaction, but alkaline environment is opposite. After ozonation catalyzed by metal chelates, the B / C ratio of PAM solution was increased from 0.121 to 0.423, and the biodegradability was improved. In addition, the reaction of ozone catalyzed by metal chelates conforms to the second order kinetic reaction, and the rate constant of the second order reaction is between 2.20 脳 10 ~ (4) 4 L (mg 路min and 3.05 脳 10 ~ (5) L (mg 路min) when the initial concentration of PAM is in the range of 50 脳 100 mg/L.
【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】：TE357.46
【参考文献】
相关期刊论文 前1条
1 唐善法;刘芬;;气浮技术处理聚合物驱含油污水研究[J];石油天然气学报(江汉石油学院学报);2006年04期
，本文编号：2445167
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