OCR Text |
Show The ratio of the number of particles in the two size regions shown in Figure 7 can be converted to relative mass by multiplying by the particle volume ratio. One explanation for the data in Figure 7 is described by the log probability plot of cumulative % of mass shown in Figure 8. As a reference point, the cumulative mass for the pulverized coal is shown. At high A/F ratios, the mass ratio of droplets approaches that of the pulverized coal and is indicated by Curve A. As the A/F ratio decreases, the mass ratio (i.e., number ratio) increases, as indicated by Curve B. Curve C indicates a low A/F ratio in which the mass ratio (number ratio) again decreases (similar to Figure 7) but is accompanied by a large fraction of the mass contained in large droplets. DECREASING A/F RATIO 150 - 160 MICRONS 82-94 MICRONS CURVE C. MASS RATIO - 0.25 CURVE B. MASS RATIO - 0.83 CURVE A, MASS RATIO - 0.5 MASS RATIO - 0.3 PULVERIZED COAL IN SLURRY i*r 95 99 99.9 99.99 CUMULATIVE % OF MASS Figure 8 Cumulative Percent of Mass as a Function of Particle Size Showing Data Trends Indicated by Figure 7 -12- |