扩散条件下褐煤正向阴燃特性的初步研究

基于传热学及燃烧学理论,用自行设计的阴燃实验装置对褐煤进行了正向阴燃实验,主要是针对正向阴燃过程中的温度及特征气体浓度变化进行了连续测定。通过分析实验数据,研究了褐煤正向阴燃时的引燃特性、耐火性和传播特性。研究结果表明,褐煤具有易引燃、阴燃传播速度慢、高温维持时间长、保存火种能力强的特点,通常是地下煤矿的一个重大安全隐患。

Preliminary Study on the characteristics of Lignite forward smoldering under diffusion

Based on the theory of heat transfer and ventilation, the temperature data of the forward smoldering process and the gas concentration data are obtained in real time by using self-designed test bed brown coal combustion and smoldering combustion test. By analyzing the physical properties of lignite, smoldering temperature data and phenomenon, the characteristics of lignite that forward smoldering ignition, fire endurance and propagation are proposed. The results show that the characteristics of lignite are easy to ignite, spread slowly, the high temperature to maintain a long time, and also can keep tinder, which usually can pose a significant security risk for the underground coal mines.