Study on feasible treatment technologies for shale gas produced wastewater
WANG Mei-cheng1, WANG Min2, ZHANG Yu-zhou1, YAO Si-cong1, WANG Jun-rong3, CHEN Yao1
1. College of Architecture and Environment, Sichuan University, Chengdu 610065, China; 2. Southwest Oil and Gas Branch, Sinopec Corp., Chengdu 610065, China; 3. Beijing Jingshui Construction Group Co., Ltd., Beijing 100089, China
Abstract: 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 Na2CO3,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.
王美城, 王敏, 张宇州, 姚思聪, 王军荣, 陈尧. 页岩气产出水的可行性处理工艺研究[J]. 现代化工, 2019, 39(3): 198-201.
WANG Mei-cheng, WANG Min, ZHANG Yu-zhou, YAO Si-cong, WANG Jun-rong, CHEN Yao. Study on feasible treatment technologies for shale gas produced wastewater. Modern Chemical Industry, 2019, 39(3): 198-201.
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