Semi-enclosed experimental system for coal spontaneous combustion for determining regional distribution of high-temperature zone of coal fire
Jingyu Zhao1
Hanqi Ming2
Tao Guo3
Yuxuan Zhang4
Jun Deng5
Jiajia Song2
Qiang Zeng6
Chi-Min Shu7
1.School of Safety Science and Engineering,Xi'an University of Science&Technology,Xi'an 710054,China;Shaanxi Key Laboratory of Prevention and Control of Coal Fire,Xi'an University of Science&Technology,Xi'an 710054,China;Post-Doctoral Research Centre for Ecology,Institute for Arid Ecology and Environment,Xinjiang University,Urumqi 830046,China2.School of Safety Science and Engineering,Xi'an University of Science&Technology,Xi'an 710054,China3.Xi'an High-Tech Zone Emergency Management Bureau,Xi'an 710065,China4.Shaanxi Coal Chemical Industry Technology Research Institute Co.Ltd.,Xi'an 710065,China5.School of Safety Science and Engineering,Xi'an University of Science&Technology,Xi'an 710054,China;Shaanxi Key Laboratory of Prevention and Control of Coal Fire,Xi'an University of Science&Technology,Xi'an 710054,China6.Post-Doctoral Research Centre for Ecology,Institute for Arid Ecology and Environment,Xinjiang University,Urumqi 830046,China7.Department of Safety,Health,and Environmental Engineering,National Yunlin University of Science and Technology,Douliou 64002,Yunlin,Taiwan,China
摘要：Temperature variation and gas generation at different 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 combustion.This study selected coal samples from Mengcun,Shaanxi Province,People's Republic of China,and developed a semi-enclosed experimental system(furnace)for simulating coal combustion.The 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 verified through the equal proportional method of fuzzy response.The 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 increased.The apparent activation energy of the coal samples during combustion first increased and then decreased as the conver-sion degree increased.Furthermore,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 first and second stages of the experiment conducted using the semi-enclosed system.The research findings can provide a theoretical basis for the prevention and control of high-temperature zones in coal combustion.
机标关键词：distributioncombustiontemperatureregionalfiresystemhighcoal
论文发表日期：2022-10-28
在线出版日期：2025-08-15（本平台首次上网日期，不代表文献的发表时间）
页数：14( 124-137 )
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