高盐、高硬度、高浊度煤系气田产出水预处理工艺参数优化  

Optimization of pretreatment parameters of produced water in coal series gas field with high salt,high hardness,and high turbidity

作　　者：王敬威 刘研萍[2] 琚宜文 琚丽婷 刘新春 WANG Jingwei;LIU Yanping;JU Yiwen;JU Liting;LIU Xinchun(College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China;Department of Environmental Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China;College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, China)

机构地区：[1]中国科学院大学资源与环境学院,北京100049 [2]北京化工大学环境科学与工程系,北京100029 [3]中国科学院大学地球与行星科学学院,北京100049

出　　处：《中国科学院大学学报（中英文）》2022年第1期74-82,共9页Journal of University of Chinese Academy of Sciences

基　　金：国家科技重大专项(2016ZX05066006)资助。

摘　　要：针对具有含盐量高、硬度大和浊度高等特点的鄂尔多斯盆地东缘临兴区块煤系气田产出水,经实验与工程论证后拟采用“预处理—反渗透—MVR”的方案使处理后的水符合农田灌溉水标准。实验模拟“硬度去除—絮凝—过滤—超滤”的预处理过程探究硬度和浊度去除的最优工艺条件。结果表明:Na_(2)CO_(3)的硬度去除效果优于NaOH,当投加量为15000 mg·L^(-1)时,硬度去除率最大,为99.39%;响应面法以浊度去除率为响应值建立的数学模型较为显著(P<0.0001),得到最优工艺条件为pH 8.85、PAC投加量148.34 mg·L^(-1)、PAM投加量6.51 mg·L^(-1),该条件下除浊率预测值为83.32%,实际除浊率为82.77%,实际值与预测值拟合度高。预处理工艺参数优化有利于工程的精细化调控从而降低成本,并为后续的反渗透脱盐处理提供保障。The produced water of coal-measure gas field in Linxing block,eastern margin of Ordos basin was characterized by high salt content,high hardness,and high turbidity.After experiment and engineering demonstration,the scheme of“pretreatment-reverse osmosis-MVR”was proposed to make the treated water meet standards for irrigation water quality.The pretreatment process of“hardness removal-flocculation-filtration-ultrafiltration”was simulated to explore the optimal process conditions for hardness and turbidity removal.The results showed that the hardness removal effect of Na_(2)CO_(3) was better than that of NaOH.When the dosage of Na_(2)CO_(3) was 15000 mg·L^(-1),the maximum hardness removal rate was 99.39%.The mathematical model established by response surface methodology with turbidity removal rate as response value was very significant(P<0.0001).The optimal process conditions were pH 8.85,PAC dosage 148.34 mg·L^(-1),PAM dosage 6.51 mg·L^(-1).Under these conditions,the predicted turbidity removal rate was 83.32%,the actual turbidity removal rate was 82.77%,indicating a high degree of fitting between the actual and predicted values.The optimization of pretreatment process parameters is conducive to the fine control of the project,so as to reduce the cost and provide a guarantee for the subsequent reverse osmosis desalination treatment.

关 键 词：煤系气 产出水 预处理 响应面优化法 参数优化 

分 类 号：X741[环境科学与工程—环境工程]