Combustion characteristics of blended coal entered into boiler furnace has obvious difference when applying different pulverizing methods

which affects normal operation of the boiler.Experimental study was performed on combustion characteristics of the mixture of bituminous coal and lean coal

by using simultaneous thermal analyzer

with two pulverizing methods.The relative value and weight of the comprehensive combustion index difference were adopted to analyze the effects of pulverizing method and oxygen concentration on combustion characteristics of the coal mixtures.Moreover

the kinetic parameters such as activation energy and frequency factor were also calculated.The results show that

the pulverizing method has a effect on combustion characteristics of the blended coals

especially in initial stage of combustion.Increasing the oxygen concentration can decrease the combustion characteristics difference of the blended coals

and the mixed ratio of inferior coal with the minimum combustion characteristics difference will be increased by 10%.The combustion of blended coal is the first-order reaction

which has kinetic compensation effect.