Industrial Experiments for Reducing Carbon Content in Fly Ash of Circulating Fluidized Bed Boilers

The carbon content in fly ash directly reflects the combustion effectiveness of circulating fluidized bed boilers and strongly affects the boiler's thermal efficiency, as well as comprehensive utilization of the pulverized coal ash. With the help of industrial tests, the influence of the bed temperature, coal quality and its granulation, primary and secondary air, bed pressure as well as the cyclone separator's efficiency, on the carbon content in the fly ash has been revealed and ways, that may serve as guidelines for reducing the carbon content in fly ash of circulating fluidized bed boilers, are elaborated.