不同预处理法对PEM钻井废液固-液分离影响研究
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摘要
固-液分离方法对钻井废液处理的工艺与设备设计具有重要的指导意义。本文对比了絮凝剂对经不同预处理的钻井废液固-液分离的影响。结果表明:单独使用FeCl_3的浓度为6250mg·L~(-1)时脱液率为53%,水相pH值为4.9;加水稀释后FeCl_3浓度为7407mg·L~(-1)时,脱液率为40%,水相pH值为3.73; HCl预处理时钻井废液起泡,添加高分子聚合物助凝剂PF-Plus而未加絮凝剂的HCl预处理钻井废液的固、液分离效果最佳,处理后水相pH值均小于1;CaCl_2/NaOH共沉淀处理后,脱液率为46%,水相pH值位于11～12之间。本文对PEM钻井废液处理的现场工艺与设备设计具有重要指导意义。
Solid-liquid separation(SLS) method has the great directive significance to the equipment and technique design of waste drilling fluids(WDF)treatment. In this paper, the effects of different flocculants on the SLS of PEM WDF without any pretreatment were compared with those which were under three different pretreatments(dilution pretreatment, HCl pretreatment and NaOH pretreatment). The results show that the dehydration rate is 53% and pH value of the water is 4.9 when the concentration of FeCl_3 is 6250 mg·L~(-1). The dehydration rate of the SLS of WDF with dilution pretreatment is 40% and p H value of the water is 3.73 when the concentration of FeCl_3 is7407 mg·L~(-1). The WDF foams when it was pretreated by HCl. After HCl pretreatment, the WDF with coagulant PFplus but without any flocculant showed the best SLS result. Through CaCl_2/NaOH coprecipitation treatment,the dehydration rate is 46% and the pH value of the water is between 11 and 12. This paper shows the great directive significance to the equipment and technique design of PEM WDF treatment.
Solid-liquid separation(SLS) method has the great directive significance to the equipment and technique design of waste drilling fluids(WDF)treatment. In this paper, the effects of different flocculants on the SLS of PEM WDF without any pretreatment were compared with those which were under three different pretreatments(dilution pretreatment, HCl pretreatment and NaOH pretreatment). The results show that the dehydration rate is 53% and pH value of the water is 4.9 when the concentration of FeCl_3 is 6250 mg·L~(-1). The dehydration rate of the SLS of WDF with dilution pretreatment is 40% and p H value of the water is 3.73 when the concentration of FeCl_3 is7407 mg·L~(-1). The WDF foams when it was pretreated by HCl. After HCl pretreatment, the WDF with coagulant PFplus but without any flocculant showed the best SLS result. Through CaCl_2/NaOH coprecipitation treatment,the dehydration rate is 46% and the pH value of the water is between 11 and 12. This paper shows the great directive significance to the equipment and technique design of PEM WDF treatment.
引文
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[13]李汶军,施尔畏.离子晶体生长机理及其生长习性[J].人工晶体学报, 2001, 30(3):232-241.
[2]胡祖彪,王清臣,陈廷廷.基于现有固控设备的废钻井液处理及利用技术[J].钻井液与完井液, 2017, 34(1):92-95.
[3]叶艳,鄢捷年,黎跃东,等.荒漠地区钻井废液无害化处理技术[J].石油与天然气化工, 2008, 37(1):81-85.
[4]刘宇程,刘骞,吴东海,等.新疆油田聚磺钻井废液固化处理技术[J].石油与天然气化工, 2017, 46(5):106-112.
[5]周建良,岳前升,杨立平,等.海上油田废弃钻井液固液分离技术研究[J].石油天然气学报, 2012, 34(9):148-151.
[6]赵宏波,李新宝,王冲,等.废弃钻井液固液分离-化学处理技术在长北气田的应用[J].石油钻探技术, 2017, 45(3):48-56.
[7]马骉,蒲晓林,张舒.废弃钻井液处理技术研究进展及发展趋势[J].现代化工, 2017,(4):42-45.
[8]侯博,杨勇平,孙欢.废弃钻井液微生物-固化复合处理技术研究[J].应用化工, 2017, 46(11):2191-2194.
[9]张瑶瑶,侯影飞,齐升东,等.油基钻屑微波热处理技术研究进展[J].石油石化节能, 2017, 7(11):19-22.
[10]沈裕盛,唐明亮,沈晓冬.水泥浆体中氢氧化钙晶体的生长习性[J].硅酸盐学报, 2016, 44(2):232-238.
[11]仲维卓,于锡铃,罗豪甦,等. KDP晶体生长基元与形成机理[J].中国科学E辑:技术科学, 1998, 28(4):320-324.
[12]仲维卓,华素坤.负离子配位多面体生长基元与晶体的结晶习性[J].硅酸盐学报, 1995, 23(4):464-470.
[13]李汶军,施尔畏.离子晶体生长机理及其生长习性[J].人工晶体学报, 2001, 30(3):232-241.