混煤燃烧反应动力学参数的实验研究

采用热天平,在20℃/min的升温速率下,对六枝化处煤和娄底煤焦两种单煤及这两煤种之间9种不同掺混比的混煤的燃烧反应动力学参数进行了实验研究。分析特性温度发现,掺混少量的六枝化处煤就能明显降低混煤的着火温度;计算所得的混煤活化能E比由父本煤种的活化能按比例加权的平均值E′小,混煤的着火性能更加接近活化能小的单煤。

Experimental Study of Kinetic Parameters of Combustion Reaction of Blended Coals

An experimental investigation on kinetic parameters of combustion reaction of blended coal from Liuzhihua’s coal and Loudi’s coal is conducted. The assays of 11 kinds of coals were performed in thermogravimetric analysis, using a heating rate of 20℃/min. Research on characteristic temperatures of coal combustion showed that the ignition temperatures of blended coals evidently became lower for a small quantity of Liuzhihua’s coal mix. It would be readily seen that the activation energy (E) of the blended coals would be less than a weighted average value (E′) calculated by the activation energy of two parent coals, but ignition property is obviously near to that of the coal, whose activation energy is lower (Liuzhihua’s coal).