Influence of Particles' Lingering Time on the Burn-off Rate of Fujian Anthracite in CFB Boilers

Factors related to the effect of lingering time of fine anthracite coke particles on the burn-off rate in CFB boiler's combustion chamber is being discussed,pointing out that the combustion chamber's height,the flue gas' flow velocity within the furnace,the seperator's efficiency and reburning of fly ash are important factors that influence Fujian anthracite's burn-off rate in CFB boilers.Measures,such as raising the combustion chamber's height properly,reducing flue gas' velocity within the furnace,improving the separator's efficiency and reburning of fly ash may all effectively elongate the lingering time of fine anthracite particles and therewith beneficial by raising the burn-off rate of the coal.Figs 2,table 1 and refs 7.