文献类型：期刊文献

英文题名：Study of the Flowability of Pulverized Coals

作者：Lu, Haifeng[1];Guo, Xiaolei[1];Gong, Xin[1];Huang, Wanjie[1];Ma, Sheng[1];Wang, Chuanhong[1]

机构：[1]E China Univ Sci & Technol, Inst Clean Coal Technol, Minist Educ, Key Lab Coal Gasificat, Shanghai 200237, Peoples R China

年份：2009

卷号：23

期号：11

起止页码：5529

外文期刊名：ENERGY & FUELS

收录：;EI(收录号：20100112613141);WOS:【SCI-EXPANDED(收录号:WOS:000272700200029)】；

基金：This work was supported by the State Key Development Program for Basic Research of China (2004CB-217702), Hi-tech Research and Development Program of China (2007AA050301), and National Natural Science Foundation of China (20576038).

语种：英文

外文关键词：Moisture determination - Pulverized fuel - Agglomeration - Compressive strength - Coal - Particle size - Scanning electron microscopy

摘要：This paper presents the effects of particle size, moisture content, and coal type oil the flowability of Pulverized coals. A plexiglas hopper for visualizing the coal discharge and a Jenike-type shear apparatus for measuring friction characteristics were used to investigate the flowability. The fine coal displays weaker flowability because of its larger specific surface area and stronger agglomeration in comparison to the relatively large-size pulverized coal. The number of agglomerated particles C-0 increases with the decrease in the particle size, which is also confirmed by the scanning electron microscopy (SEM) images. Increasing the moisture content tends to make the pulverized coal more cohesive. Cohesive forces acting among wet coal particles are mainly due to capillary forces associated with liquid bridging, which increases with the moisture content. However, the moisture content to some extent may act as a lubricant and improve flow along the wall surface. The coal type also has it significant effect on the flowability because of the differences in their compositions and physical structures. The measuring results show that the nowability of pulverized coal improves with the increasing coal rank.