Abstract
We report solids flow pattern in a laboratory-scale fluidized bed of coal and ash mixtures. Suitable tracers were designed and deployed to determine the solids flow path of a typical particle through Radioactive Particle Tracking (RPT). Experiments were conducted in a cylindrical bed of 0.1 m in i.d. with two inventory compositions, namely, 70% Coal + 30% Bottom Ash (Composition I) and 20% Coal + 80% Bottom Ash (Composition II). Comparative analysis of RPT measurements yielded overall bed behavior, which was quantified in terms of time-averaged mean velocity, solids flux, RMS velocity, and kinetic energy per unit volume of the coal – bottom ash mixture. The mean axial velocity and solids flux profile indicated the influence of strong slugs on the solids flow patterns.
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