富氧条件下煤燃烧特性的热重分析实验研究

为研究氧气浓度变化对煤燃烧特性的影响规律,利用热重分析对4种煤样在不同氧气体积浓度(21%、30%、40%、70%、100%)条件下的燃烧特性进行实验研究,根据实验结果分析氧气浓度对不同煤样燃烧动力学参数的影响.结果表明:随着氧气浓度的增大,煤样的着火温度及燃烬温度均呈下降趋势,且燃烬温度相对于着火温度下降得更快,煤粉...

Experimental study on combustion characteristics of coals under enriched-oxygen condition by thermo-gravimetric analysis

Four different coals have been used to study the effects of oxygen concentration on coal combustion characteristics under different oxygen volume concentration ( 21% 、30% 、40% 、70% 、100% ) by thermo-gravimetric analysis experiments. The results show: with the oxygen concentration increases,the ignition and burnout temperatures of coal decrease and the burn-out temperature decreases faster; The ignition time brings forward,the combustion time shortens and the maximum weight-loss rate increases; The combustion of pulverized coals complies with the rule of one-rank reaction; The apparent activation energy and frequency factors of coals increase,and from brown coal to anthracite,the magnitude of apparent activation energy increases faster.