油田配聚污水中S~(2-)的去除方法优化研究
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摘要
油田回注水中含有大量S~(2-),其会降低聚合物———部分水解聚丙烯酰胺(HPAM)的黏度,进而影响驱油效果。采用化学氧化法去除油田污水中的S~(2-),探讨了KMnO_4、H_2O_2和NaClO对S~(2-)的去除效果,考察了油田污水中S~(2-)经氧化去除后聚合物黏度的恢复情况。实验结果表明,3种氧化剂均能有效去除油田污水中的S2-,提高聚合物黏度。经过安全性、方便性、性价比的对比,发现KMnO_4既能快速有效地去除S~(2-),改善聚合物黏度,且使用方便,价格合理,是最优氧化剂。
Oilfield reinjection water consists of a great deal of S~(2-),which can reduce the viscosity of polymer-partial hydrolyzed polyacrylamide(HPAM),and furthermore,affect oil production effect. Chemical oxidation method has been used for the removal of S~(2-)from oilfield wastewater. The removing effect of KMnO_4,H_2O_2 and Na Cl O on the S~(2-)are discussed. After S~(2-)has been removed from the oilfield wastewater by oxidation method,the restoring state of polymer viscosity is investigated. The experimental results show that all of the three kinds of oxidants can effectively remove S~(2-)from oilfield wastewater,and improve the polymer viscosity. Based on the contrasts of security,convenience and price-performance ratio,it is found that KMnO_4 not only can rapidly and effectively remove S~(2-),and increase the polymer viscosity,but also can be used conveniently,and has reasonable price-performance ratio. Therefore,it is the best oxidant.
Oilfield reinjection water consists of a great deal of S~(2-),which can reduce the viscosity of polymer-partial hydrolyzed polyacrylamide(HPAM),and furthermore,affect oil production effect. Chemical oxidation method has been used for the removal of S~(2-)from oilfield wastewater. The removing effect of KMnO_4,H_2O_2 and Na Cl O on the S~(2-)are discussed. After S~(2-)has been removed from the oilfield wastewater by oxidation method,the restoring state of polymer viscosity is investigated. The experimental results show that all of the three kinds of oxidants can effectively remove S~(2-)from oilfield wastewater,and improve the polymer viscosity. Based on the contrasts of security,convenience and price-performance ratio,it is found that KMnO_4 not only can rapidly and effectively remove S~(2-),and increase the polymer viscosity,but also can be used conveniently,and has reasonable price-performance ratio. Therefore,it is the best oxidant.
引文
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[2]Yuan Rui,Li Ying,Li Chunxiu,et al.Study about how the metal cationic ions affect the properties of partially hydrolyzed hydrophobically modified polyacrylamide(HMHPAM)in aqueous solution[J].Colloids and Surfaces A:Physicochemical and Engineering Aspects,2013,434:16-24.
[3]Stahl G A,Schulz D N.Water-soluble polymers for petroleum recovery[M].New York:Plenum Publishing Corporation,1998:181-194.
[4]王其伟.S2-对聚合物黏度的影响[J].中国石油大学学报:自然科学版,2011,35(2):157-161.
[5]张铜祥.油田含硫污水处理技术研究[D].西安:西安石油大学,2009.
[6]尹小明,朱宜庚,朱亚丽.硫离子对聚合物黏度的影响及其处理方法[J].油气田地面工程,2010,29(4):54-55.
[7]朱麟勇,常志英,李妙贞,等.部分水解聚丙烯酰胺在水溶液中的氧化降解I.温度的影响[J].高分子材料科学与工程,2000,16(1):113-116.
[8]黄漫,李美蓉,田兰兰,等.亚铁离子对驱油聚合物溶液黏度的影响及其降黏机理[J].应用化学,2013,30(12):1399-1403.
[9]李美蓉,柳智,宋新旺,等.金属阳离子对聚丙烯酰胺溶液黏度的影响及其降黏机理研究[J].燃料化学学报,2012,30(1):43-47.
[10]刘伟.油田污水处理中∑Fe含量控制的必要性[J].中国石油和化工标准与质量,2012,33(11):62-63.
[11]孟令伟,康万利,刘莉萍,等.硫离子对HPAM溶液黏度的影响及除硫方法研究[J].油田化学,2009,26(3):293-295.
[12]国家环境保护总局.水和废水监测分析方法[M].4版.北京:中国环境科学出版社,2003:139-141.
[13]朱麟勇,常志英,李明宇,等.部分水解聚丙烯酰胺在水溶液中的氧化降解[J].高分子材料科学与工程,2000,16(2):112-114.
[14]石宁,谢传欣,于丽明,等.双氧水分解危险特性的定量研究[J].大氮肥,2010,33(1):53-55.
[15]刘中兴,谢传欣,石宁,等.过氧化氢溶液分解特性研究[J].齐鲁石油化工,2009,37(2):99-102.