Conversion of Different Ash Content Brown Coal in Fluidized Bed
Available equations used to determine combustion specific rate of coal-derived cokes describe the burning of carbon particles well enough but are not accurate in case of ash-containing coke particles combustion.This study is an attempt to account for the influence of both initial ash content and its increase in the course of carbon conversion in specific rate calculations.The results of experimental study of burn-out dynamics of Volchanskiy field (North Urals) brown coal and its coke with different ash content under conditions of fluidized bed combustion at impulse-type non-gradient reactor RSC-1 and dynamic installation Pyrolysis-M are summarized.Diffusion and heterogeneous (kinetic) components of carbon combustion rate are identified separately by using diffusion and kinetics equation with correction for carbon mass fraction in particles.Burning particle overheating values and heterogeneous combustion rate constants at different temperatures are estimated.
brown coal coke residue ash content fluidized bed
P.Osipov N.Chernyavskiy A.Ryzhkov S.Dulienko A.Remenuk
Department of Thermal Power Plants,Ural Federal University,Ekaterinburg 620002,Russia Coal Energy Technology Institute of National Academy of Science of Ukraine,Kiev 04070,Ukraine
国际会议
The 7th International Symposium on Coal Combustion(第七届国际煤燃烧学术会议)
哈尔滨
英文
71-76
2011-07-19（万方平台首次上网日期，不代表论文的发表时间）