煤热动力学参数、特征温度与挥发分关系的试验研究  

Experimental Study on the Relationship among the Coal Kinetics Parameters,Characteristic Temperatures and Volatile

作　　者：朱红青[1] 郭艾东[1] 屈丽娜[1] 

机构地区：[1]中国矿业大学(北京)资源与安全工程

出　　处：《中国安全科学学报》2012年第3期55-60,共6页China Safety Science Journal

基　　金：国家自然科学基金资助(51074168)

摘　　要：通过煤的热动力学参数和特征温度可以表征煤自燃危险程度。而在实际情况中,这些数据缺少,往往只有煤的工业参数。因此,研究工业参数与表征煤自燃危险参数的关系十分必要。为了分析和建立该关系,基于非等温试验方法对不同煤样进行热重试验分析,得出8个煤样在10℃/min升温速率下的反应动力学参数与煤工业分析参数的关系,揭示挥发分与煤的氧化特性、特征温度的关系。试验结果表明:8个煤样的挥发分排序F3>F8>F4>F7>F2>F1>F5>F6,各特征温度排序基本满足T3<T8<T4<T7<T2<T1<T5<T6,热动力学参数活化能排序E3<E8<E4<E7<E2<E1<E5<E6,且挥发分与特征温度点、活化能成非成线性关系,由此可以看出挥发分越高,煤燃烧特征温度值越低,热动力学参数值越小,煤越易被点燃,煤的自燃危险性越高。The level of spontaneous combustion danger of coal can be characterized by characteristic temperature or thermal dynamic parameters.In fact,there are often only coal industry parameters in hand,so it is necessary to study the relationship between the parameters characterizing the coal spontaneous combustion danger and the industrial parameters.In order to establish and analyze the relationship,different coal samples were studied through thermo-gravimetric experiments based on a non-isothermal experimental method.The relationships among coal kinetics parameters,characteristic temperatures and volatile under 10 ℃/min heating rate were obtained,the relationships of a volatile and coal oxidation characteristics were revealed.The experimental results show that with the volatile part growing up,the coal combustion temperature characteristics are lower,and the thermal dynamic parameters are lower,and the coal is more esay to be lit,so the risk of coal spontaneous combustion is higher.

关 键 词：挥发分 活化能(E) 指前因子(A) 热重试验 煤自燃 

分 类 号：X936[环境科学与工程—安全科学]