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Semi-enclosed experimental system for coal spontaneous combustion for determining regional distribution of high-temperature zone of coal fire

引用

International Journal of Coal Science & Technology 2022年第5期9卷 124-137页

作者： Jingyu Zhao Hanqi Ming Tao Guo Yuxuan Zhang Jun Deng Jiajia Song Qiang Zeng Chi‑Min Shu School of Safety Science and Engineering Xi’an University of Science&TechnologyXi’an 710054China Shaanxi Key Laboratory of Prevention and Control of Coal Fire Xi’an University of Science&TechnologyXi’an 710054China Post-Doctoral Research Centre for Ecology Institute for Arid Ecology and EnvironmentXinjiang UniversityUrumqi 830046China Xi’an High-Tech Zone Emergency Management Bureau Xi’an 710065China Shaanxi Coal Chemical Industry Technology Research Institute Co.Ltd. Xi’an 710065China Department of Safety Healthand Environmental EngineeringNational Yunlin University of Science and TechnologyDouliou 64002YunlinTaiwanChina

Temperature variation and gas generation at diferent depths and positions in the coal combustion process were studied to determine the propagation and evolution of high temperature regions in the process of coal spontaneous *** study selected coal samples from Mengcun,Shaanxi Province,People’s Republic of China,and developed a semi-enclosed experimental system(furnace)for simulating coal *** thermal mass loss of coal samples under various heating rates(5,10,and 15℃/min)was analyzed through thermogravimetric analysis,and the dynamic characteristics of the coal samples were analyzed;the reliability of the semi-enclosed experimental system was verifed through the equal proportional method of fuzzy *** results reveal that the high-temperature zone is distributed nonlinearly from the middle to the front end of the furnace,and the temperatures of points in this zone decreased gradually as the layer depth *** apparent activation energy of the coal samples during combustion frst increased and then decreased as the conversion degree ***,the proportion of mass loss and the mass loss rate in the coal samples observed in the thermogravimetric experiment is consistent with that observed in the frst and second stages of the experiment conducted using the semi-enclosed *** research fndings can provide a theoretical basis for the prevention and control of hightemperature zones in coal combustion.

关键词： coalfeld fre area Fuzzy migration path Semi-enclosed experimental system Thermogravimetric analysis Dynamic characteristics

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