解离-聚结体系分离风化油砂
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摘要
以玉门风化油砂为研究对象,通过解离剂将沥青从砂粒剥离,利用聚结剂对水相中的沥青微滴聚结,实现了沥青、水、砂粒三相分离。考察了解离剂组成和聚结剂用量等工艺条件对风化油砂分离效果的影响。采用偏光显微镜和FTIR技术对风化油砂、尾砂及沥青试样进行了表征。实验结果表明,以Na OH、Na Cl和吐温80为解离剂,处理后尾砂的含油率低至0.2%;以聚丙烯酰胺为聚结剂,加入量为0.005 g/g时沥青收率为93.5%。提出了分离风化油砂的解离-聚结体系模型,即通过表面活性物质强化沥青乳化,通过碱剂的化学驱动力使"露头"油砂表面沥青剥离,以高分子聚结剂彻底回收分散态的风化油砂沥青。
The Yumen weathered oil sands were separated into bitumen,water and sands by means of liberating agent and flocculating agent,in which the bitumen was separated from the sands through the liberation process and then the bitumen was recovered through the flocculation process. The effects of the liberating agent composition and the flocculating agent dosage on the separation of the weathered oil sands were investigated. The results showed that,oil content in the tailing sands could be as low as 0.2% when Na OH,Na Cl and Tween 80 were used as the liberating agent,and the bitumen recovery could be up to 93.5% when 0.005 g/g polyacrylamide was used as the flocculating agent. The weathered oil sands,tailing sands and bitumen were characterized by means of digital polarizing microscope and FTIR. The mechanism for the separation of the weathered oil sands by liberationflocculation was proposed,namely the surfactants made the weathered oil sands "outcrop",the alkaline agent peeled off the bitumen film from the"outcrop"oil sands,and then the polymeric flocculant was used to recover the bitumen dispersed in the water.
The Yumen weathered oil sands were separated into bitumen,water and sands by means of liberating agent and flocculating agent,in which the bitumen was separated from the sands through the liberation process and then the bitumen was recovered through the flocculation process. The effects of the liberating agent composition and the flocculating agent dosage on the separation of the weathered oil sands were investigated. The results showed that,oil content in the tailing sands could be as low as 0.2% when Na OH,Na Cl and Tween 80 were used as the liberating agent,and the bitumen recovery could be up to 93.5% when 0.005 g/g polyacrylamide was used as the flocculating agent. The weathered oil sands,tailing sands and bitumen were characterized by means of digital polarizing microscope and FTIR. The mechanism for the separation of the weathered oil sands by liberationflocculation was proposed,namely the surfactants made the weathered oil sands "outcrop",the alkaline agent peeled off the bitumen film from the"outcrop"oil sands,and then the polymeric flocculant was used to recover the bitumen dispersed in the water.
引文
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[17]李术元,王剑秋,钱家麟.世界油砂资源的研究及开发利用[J].中外能源,2011,16:10-22.
[2]田晓.石油沥青老化/硬化机理研究[D].青岛:中国石油大学(华东),2009.
[3]Trong Dangvu,Jha R,Wu Shiauyin,et al.Effect of solid wettability on processability of oil sands ores[J].Energy Fuels,2009,23(5):2628-2636.
[4]Ren Sili,Trong Dangvu,Zhao Hongying,et al.Effect of weathering on surface characteristics of solids and bitumen from oil sands[J].Energy Fuels,2009,23(1):334-341.
[5]Wang Louxiang,Trong Dangvu,Xu Zhenghe,et al.Use of short-chain amine in processing of weathered/oxidized oil sands ores[J].Energy Fuels,2010,24(6):3581-3588.
[6]任嗣利.水基提取技术用于油砂分离的研究进展[J].化工学报,2011,62(9):2406-2412.
[7]许修强,郑德温,徐金明,等.我国油砂分离技术研究进展[J].现代化工,2010,30(8):12-15.
[8]朱秀春,曹祖宾,韩冬云,等.内蒙古油砂水洗实验及尾砂环保处理实验研究[J].辽宁石油化工大学学报,2014,34(1):30-33.
[9]Sundeep S,Chris F,Artin A,et al.Study of bitumen liberation from oil sands ores by online visualization[J].Energy Fuels,2012,26(5):2883-2890.
[10]艾尼股份公司.从油砂中回收沥青的方法:104169397 A[P].2014-11-26.
[11]赵瑞玉,王通,张超,等.油砂润湿性研究进展[J].油田化学,2014,31(4):620-625.
[12]Yang Hongqiang,Wang Yanhong,Ding Mingshan,et al.Water-assisted solvent extraction of bitumen from oil sands[J].Ind Eng Chem Res,2012,51(7):3032-3038.
[13]Nuerxida P,Aron L,Bruce M,et al.Extraction of bitumen from oil sands using deep eutectic ionic liquid analogues[J].Energy Fuels,2015,29(8):4927-4935.
[14]Hossein N,Sebastian W,Phillip C,et al.Migration of fi ne solids into product bitumen from solvent extraction of Alberta oil sands[J].Energy Fuels,2014,28(5):2925-2932.
[15]张书庄,肖辉.黏土含量对粉沙质泥沙沉降速度的影响[J].水道港口,2008,29(5):310-313.
[16]王琪琪,吴朝东.新疆库车坳陷侏罗系碎屑岩中黏土矿物粒径研究[J].岩石矿物学杂志,2005,24(6):648-652.
[17]李术元,王剑秋,钱家麟.世界油砂资源的研究及开发利用[J].中外能源,2011,16:10-22.