页岩气产出水的可行性处理工艺研究
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摘要
针对页岩气产出水的合理处置及达标回用进行了研究,探讨了处理工艺的可行性。首先投加NaOH和Na_2CO_3进行碱化絮凝的预处理,充分混合后过滤;对滤后液进行三效蒸馏,分离得到残余母液和一、二、三效蒸馏液;针对水质超标的一效蒸
This paper studies the reasonable treatment and utilization of shale gas produced wastewater and discusses feasible treatment processes. Firstly,the waste water is pretreated through alkalization and flocculation with addition of NaOH and Na_2CO_3,and a supernatant is obtained after sufficient mixing and filtration.Secondly,three-effect evaporations are performed on the supernatant to separate the residue( mother liquor) and the first,second and third effect distillates.Thirdly,adsorption and photocatalytic integrated treatment is used to purify the first effect distillate,then the effluent water is mixed with the second and third effect distillates to meet the recycling water quality standards for refinery and chemical industry. Finally,the mother liquor from multiple-effect evaporations is treated by adsorption to reduce effectively COD content,which will be favorable for the subsequent treatment processes,i. e.,crystal desalination,flowback or re-injection.
This paper studies the reasonable treatment and utilization of shale gas produced wastewater and discusses feasible treatment processes. Firstly,the waste water is pretreated through alkalization and flocculation with addition of NaOH and Na_2CO_3,and a supernatant is obtained after sufficient mixing and filtration.Secondly,three-effect evaporations are performed on the supernatant to separate the residue( mother liquor) and the first,second and third effect distillates.Thirdly,adsorption and photocatalytic integrated treatment is used to purify the first effect distillate,then the effluent water is mixed with the second and third effect distillates to meet the recycling water quality standards for refinery and chemical industry. Finally,the mother liquor from multiple-effect evaporations is treated by adsorption to reduce effectively COD content,which will be favorable for the subsequent treatment processes,i. e.,crystal desalination,flowback or re-injection.
引文
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[12]杨德敏,夏宏,程方平.臭氧法深度氧化处理页岩气钻井废水[J].水处理技术,2016,42(2):88-91.
[2]肖波.电催化氧化复合磁分离处理页岩气压裂返排液室内研究[J].石油与天然气化工,2017,46(4):109-114.
[3]李兰,杨旭,杨德敏.油气田压裂返排液治理技术研究现状[J].环境工程,2011,29(4):54-56.
[4]韩卓,郭威,张太亮.非常规压裂返排液回注处理实验研究[J].石油与天然气化工,2014,43(1):108-112.
[5]Tian L,Wang Z,Krupnick A,et al.Stimulating shale gas development in China:A comparison with the US experience[J].Energy Policy,2014,75:109-116.
[6]Kuyukina M S,Ivshina I B,Serebrennikova M K,et al.Oilfield wastewater biotreatment in a fluidized-bed bioreactor using co-immobilized Rhodococcus cultures[J].Journal of Environmental Chemical Engineering,2017,5(1):1252-1260.
[7]Zeng Y,Yang C,Zhang J,et al.Feasibility investigation of oily wastewater treatment by combination of zinc and PAM in coagulation/flocculation[J].Journal of Hazardous Materials,2007,147(3):991-996.
[8]Campos J C,Borges R M,Oliveira F A,et al.Oilfield wastewater treatment by combined microfiltration and biological processes[J].Water Research,2001,36(2002):95-104.
[9]杨云,宋梦然,于萍,等.人造沸石对氨氮废水的吸附及其电化学再生研究[J].工业水处理,2017,37(10):65-68.
[10]杜冬云,王伟利,于凤娥,等.沸石处理氨氮废水的研究[J].河南化工,2003,(9):15-17.
[11]徐如人.分子筛与多孔材料化学[M].北京:科学出版社,2004:61-63.
[12]杨德敏,夏宏,程方平.臭氧法深度氧化处理页岩气钻井废水[J].水处理技术,2016,42(2):88-91.