基于Model-fitting法褐煤自燃过程动力学的研究

Study on Dynamics of Lignite′s Spontaneous Combustion Process Based on Model-fitting Method

针对褐煤脱水后容易自燃的特性,利用热分析技术研究褐煤自燃过程的动力学。在热重分析仪上,褐煤呈现脱水失重阶段、吸氧阶段、受热分解阶段以及燃烧阶段和燃尽阶段,其中受热分解阶段氧化反应剧烈,是褐煤自燃的主要诱因。

Considering the easy spontaneous combustion characteristics of lignite after drying, aims at exploring the dynamics of this process with thermal analysis techniques. In the thermal analyzer, there are five periods： drying and losing weight period; adsorbing the oxygen period; pyrolysis period; burning period and burning out period. The lignite is oxidized fiercely in the pyrolysis period, which is the main cause of its spontaneous combustion.