Effects of petrochemical sludge on the slurry-ability of coke water slurry
Effects of petrochemical sludge on the slurry-ability of coke water slurry
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DOI：
10.1016/j.expthermflusci.2013.03.006
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发表时间：
2013-07
影响因子：
3.2
通讯作者：
Xiuyuan Ma;Y. Duan;Meng Liu
中科院分区：
文献类型：
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作者：
Xiuyuan Ma;Y. Duan;Meng Liu
制备了含有石油焦、石化污泥、水和化学添加剂的焦炭污泥浆，研究了石化污泥对其流变特性和静态稳定性特性的影响。实验中，利用旋转粘度计研究了焦泥浆的流变特性。通过测量一段时间内从浆料中分离出的水的质量来分析静态稳定性特性。利用FTIR、XRD、SEM等手段探讨了官能团、无机矿物和表面结构对焦泥浆浆成浆能力的影响。结果表明，不含石化污泥的焦水浆是一种膨胀性流体，石化污泥可以将其流变特性从剪切稠化改变为剪切稀化。由于焦泥浆中石化污泥量小于石油焦的6wt.%，焦泥浆具有与焦水浆相似的流变特性；当石化污泥量为6wt.%时，焦炭污泥浆属于牛顿流体，石化污泥量超过6wt.%后变成假塑性流体。此外，石化污泥还可以改善焦炭污泥浆的静态稳定性特性。石化污泥和石油焦的亲水官能团、无机矿物质和表面结构对焦泥浆的流变性能和静态稳定性特性起着关键作用。
The coke sludge slurry containing petroleum coke, petrochemical sludge, water and chemical additives was prepared to study effects of petrochemical sludge on its rheological properties and static stability characteristics. In the experiment, rheological properties of coke sludge slurry were investigated with rotational viscometer. The static stability characteristics were analyzed by measuring the mass of the water separated from the slurry in a period. Effects of functional groups, inorganic minerals and surface structure on the slurry ability of coke sludge slurry were explored by the FTIR, XRD and SEM. Results suggest that coke water slurry which does not include petrochemical sludge is a dilatant fluid and petrochemical sludge can alter its rheological properties from shear thickening to shear thinning. As the petrochemical sludge amount is less than 6wt.% of petroleum coke in the coke sludge slurry, coke sludge slurry has similar rheological properties with coke water slurry; when the petrochemical sludge amount is 6wt.%, coke sludge slurry belongs to Newtonian fluid and turns into pseudo-plastic fluid after the petrochemical sludge amount exceeds 6wt.%. Besides, petrochemical sludge could improve the static stability characteristics of coke sludge slurry. Hydrophilic functional groups, inorganic minerals and surface structure of petrochemical sludge and petroleum coke play the key role on the rheological properties and static stability characteristics of coke sludge slurry.