水煤浆粒度分布的分形学研究  

Fractal research on particle-size distribution of coal-water slurry

作　　者：张省现[1] 夏德宏[1] 吴祥宇[1] 

机构地区：[1]北京科技大学 热能工程系,北京100083

出　　处：《热科学与技术》2004年第4期348-352,共5页Journal of Thermal Science and Technology

摘　　要：在水煤浆燃料的制备过程中,水煤浆中煤粒的粒度分布至关重要。从分形几何原理出发,理论解析得出了连续分布的水煤浆中煤粒的分形粒度分布公式,并与几种常用的经验型粒度分布和实际应用的粒度分布进行了比较,得出了分形是粒度分布的本质特征。研究结果表明:水煤浆的浓度取决于煤粒的最大、最小粒径和煤粒的粒度分形维数。研究得到的水煤浆中煤粒的分形粒度分布可用于指导高浓度、流动性好的水煤浆燃料的制备。During the preparation of coal-water slurry fuel, the particle-size distribution of coal-water slurry is extremely important. The fractal particle-size distribution formulas of continuous distribution of coal-water slurry was obtained according to the fractal geometry theory. Based on the comparison between the fractal particle-size distribution and some commonly used empirical formulae and practical particle-size distribution, it was concluded that the fractal is the essential characteristics of particle-size distribution of coal-water slurry fuel. The concentration of coal-water slurry depends on the maximum and minimum diameters and the granularity fractal dimension of coal powder. The fractal particle-size distribution of coal-water slurry obtained in this paper can be used for the preparation of highly loaded coal-water slurry fuel with sound rheological characteristics.

关 键 词：水煤浆 粒度分布 中煤 经验型 粒径 制备过程 燃料 连续分布 分形 公式 

分 类 号：TQ536[化学工程—煤化学工程] TQ534