Analysis of the Configuration and Motion of Coal Particles in Fluid Bed

Abstract

The fineness of pulverized coal has significant influence on the combustion pollutant, the image recognition method is directly aimed at the size and shape information of pulverized coal particles, which eliminates the possible errors in the transformation process and makes the measurement results accurately reflect the particle information. In this paper, the image recognition method is used to measure and collect the particle shape and fineness information of pulverized coal. By combining the Discrete Element Method (DEM) with the Computational Fluid Dynamics (CFD), the vibration flow behavior and movement regularity of lignite was simulated in vertical fluidized beds. The resualt shows that the difference of shape factor between micron-level coal particles and millimeter-scale coal particles is not very large.