Effects of blending coals on the behavior of coal water slurry

被引：0

作者：

Hu, Yaxuan ^{[1
]}

Liu, Jianzhong ^{[1
]}

Wang, Ruikun ^{[1
]}

Yu, Yujie ^{[1
]}

Zhou, Junhu ^{[1
]}

Cen, Kefa ^{[1
]}

机构：

[1] State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, Zhejiang Province, China

来源：

Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2012年 / 32卷 / 02期

关键词：

Shear thinning - Blending - Non Newtonian flow - Non Newtonian liquids - Rheology - Coal - Elasticity;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Four different coals, Shigang, Xiaotun, Yanzhou, and Huangling coals, were blended with each other in different proportions, and the effect of blending coals on the slurry ability, rheology and stability of coal water slurry (CWS) were studied. The slurry ability, rheology and stability of CWS prepared by the single coal were also researched. Results show that coals with lower O/C ratio have better slurry ability. The coal water slurries behave as the properties of non-Newtonian fluids over certain range of concentration, and the shear thinning behavior is stronger with increasing solid concentration. Blending coals can influent the rheology and stability of CWS. However, blended with the same coal, different coal type and blending ratio have different effects on the rheology and stability. In addition, the effects of coal blending on slurry ability are non-linear. The maximum solid concentration of blending coal water slurry is not equal to the weighted average value of individual coal, with the maximum deviation reaching 1.82 percentage points. Stability experiment shows that, water separation ratio after 20 days is below 15% for either the single coal or the blending coal water slurry. And blending different coals has different effects on the stability. © 2012 Chin. Soc. for Elec. Eng.

引用

页码：31 / 38