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煤燃烧的部分过程是在低氧浓度下进行的,本文利用热重实验研究煤在低氧浓度下燃烧特性的变化,重点研究着火特性、燃尽特性和燃烧速率的变化;同时计算分析低氧浓度下,煤燃烧反应动力学参数的变化。实验结果表明,低氧浓度下煤燃烧反应的TG和DTG曲线均向高温区靠近,着火温度基本不变,燃尽温度提高,燃烧速率下降;低氧浓度下燃烧反应的动力学参数活化能E和频率因子k_0之间存在着补偿效应。
Part of coal combustion process is carried out under low oxygen concentration. In this paper, the thermal gravity experiment was conducted to study the change of combustion characteristics of coal under low oxygen concentration. The changes of fire characteristics, burnout characteristics and combustion rate were studied emphatically. Simultaneously, Concentration, coal combustion reaction kinetic parameters. The experimental results show that the TG and DTG curves of coal combustion reaction are close to the high temperature zone under low oxygen concentration, the ignition temperature is basically unchanged, the burnout temperature is increased and the combustion rate is decreased. The kinetic parameters of the combustion reaction at low oxygen concentration activation energy E And frequency factor k_0 there is a compensation effect between.