Study of particle size distribution of pulverized coals in utility boilers
Study of particle size distribution of pulverized coals in utility boilers
复制标题
DOI：
10.1080/02726351.2017.1334731
复制
发表时间：
2018-11
影响因子：
2.5
通讯作者：
N. Vishnoi;S. Mohapatra
中科院分区：
文献类型：
--
作者：
N. Vishnoi;S. Mohapatra
粒径分布（PSD）是能源工业中的一种测量方法，它提供了有关粒径分布范围和宽度的信息。PSD函数被广泛用于表征粉末和液滴等分散系统，在煤炭和相关加工中有着巨大的应用。本文从煤粉PSD的角度对煤粉样品进行了分析。采用球磨机对3种煤样进行粉碎和研磨，分别利用扫描电镜（SEM）和能谱仪（EDS）对得到的煤粉样品进行形态特征和化学成分检测。然后对煤样进行机械筛分，得到PSD曲线。采用Rosin-Rammler （RR）和Gates-Gaudin-Schuhmann （GGS）两种数学模型对PSD曲线数据的分布函数F(d)（质量分数）进行估计并进行比较。将RR模型应用于煤样PSD曲线数据时，得到了很好的结果，使得不同粒度的分选更加准确。
ABSTRACT Particle size distribution (PSD) is a measurement in the energy industry and provides information about the range and width of distribution of particle sizes. PSD function is widely used to characterize dispersed systems like powders and droplets and finds immense applications in coal and related processing. In the present work, pulverized coal samples were analyzed from the perspective of their PSD. Three coal samples were crushed and ground using ball mill, and the obtained pulverized coal samples were then tested for their morphological characteristics and chemical composition using scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS), respectively. The coal samples were then sieved mechanically to obtain the PSD curves. Two mathematical models, viz Rosin-Rammler (RR) and Gates-Gaudin-Schuhmann (GGS), were used and compared for the estimation of the distribution function F(d) (mass fraction) for the data obtained from the PSD curves. The RR model provided splendid results when it is applied on the data procured from PSD curves of coal samples, leading to more accurate segregation of divergent particle sizes.