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化工学报  2015 

罐底油泥黏度特性及降黏措施

DOI: 10.11949/j.issn.0438-1157.20150457, PP. 4380-4387

Keywords: 罐底油泥,黏度特性,模型,加热,表面活性剂,溶剂

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Abstract:

利用HAKKEVT550旋转黏度计对罐底油泥的黏度特性进行了研究,筛选出合适的黏度模型,分析比较了加热(20~60℃)、添加表面活性剂(曲拉通X-100)水溶液(质量分数为0.5%)和添加溶剂(正戊醇和120#溶剂油)对油泥黏度的影响。结果表明,由于罐底油泥包含大量固体颗粒,在0~600s-1剪切速率范围内,具有塑性流体和假塑性流体的双重特性,Casson模型为最适合的黏度模型,拟合决定系数为0.986。在3种降黏措施中,将样品加热至50℃与20℃下添加质量分数为10%的表面活性剂水溶液均可使油泥黏度下降50%,样品流型向假塑型转变。掺入溶剂的降黏效果优于前两者,最佳效果为在20℃、300s-1剪速下,添加质量分数为10%的120#溶剂油,黏度下降达90%,样品流型向牛顿型转变。

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