摘要
用普通热分析天平测量了煤粉燃烧着火温度,可燃性指数和反应动力学参数。指出将热重曲线发生明显失重时的切线与其基线的交点对应的温度定义为着火温度较为合理;挥发份的总量和不同组成二者均能影响着火;用Anderson-Freeman差减微分法计算反应活化能和频率因子简单、适用。可燃性指数是表征煤在反应前期能力的重要指标,可用于评价火焰稳定性。同种但产地不同的煤,其燃烧特性可能有较大的差别。
The ignition temperatures, combustible indexes and kinetics parameters of pulverised coals have been studied with the thermogravimetry. The intersection of the tangential line, which is tangential to the TG curve in the regime of appreciably decreasing weight with temperature increasing, and the base line can be defined reasonably as the ignition temperature. It is simple and useful to measure and calculate the activity energy and the frequency factor of coal-burning reaction with Anderson-Freeman's method. The combustible index can be used for indicating the reaction ability in the earlier stage of the pulverised coal combustion, and the flame stability.
出处
《冶金能源》
1989年第5期41-44,共4页
Energy For Metallurgical Industry
