Influence of thermal radiation intensity on coal combustion characteristics
In order to study the influence of different temperatures on the combustion characteristics of coal,a cone calorimeter was used to test the combustion of gas coal in Zhujidong Coal Mine under different thermal radiation intensities(35,40,45,50 kW/m2).The results show that the peak heat release rate of coal sample increases with the increase of thermal radiation intensity,which is 81.54 kW/m2 at 50 kW/m2,which is 15.96%,10.41%and 1.53%higher than that at 35 kW/m2,40 kW/m2 and 45 kW/m2,respectively.The order of total heat release of coal samples is 45 kW/m2 sample>50 kW/m2 sample>40 kW/m2 sample>35 kW/m2 sample,that is,it increases first and then decreases with the increase of thermal radiation intensity.With the increase of thermal radiation intensity from 35 kW/m2 to 50 kW/m2,the peak mass loss rate and total mass loss of coal samples increase by 38.15%and 13.75%,respectively.In the later stage of combustion,the CO release amount at 45 kW/m2 is the smallest,which is 0.36 kg/kg,which is 0.33,0.27 and 0.04 kg/kg lower than that at 35,40 and 50 kW/m2,respectively.
coal combustionthermal radiation intensityheat release ratemass loss rateCO release amount
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