PROCESS AND APPARATUS FOR PURIFYING THE COAL ASH FOROM COAL-BURNING BOILER

摘要

Fly ash discharged with exhaust gas from coal burning boiler is separated, collected and heat treated with the heating means and burning air for removing the unburnt carbon in fly ash. The heat treated fly ash is remixed with the separated exhaust gas for preheating the burning air and the refined fly ash is recovered. The preheated burning air is fed to the heating means and the coal burning boiler, respectively.