Effect of flow rates of gases flowing through a coal bed during coal heating and cooling on concentrations of gases emitted and fire hazard assessment
Marek Wi(e)ckowski1
Natalia Howaniec2
Adam Smoli(n)ski3
1.Department of Mining Aerology, Central Mining Institute,Plac Gwarków 1, 40-166 Katowice, Poland2.Department of Energy Saving and Air Protection, Central Mining Institute, Plac Gwarków 1, 40-166 Katowice, Poland3.Central Mining Institute, Plac Gwarków 1, 40-166 Katowice,Poland
摘要：The flow velocity of gases in gobs directly influences the kinetics and intensity of gaseous components release during heating and cooling of coal.The assessment of fire hazard is performed on the basis of concentrations of particular gases in a mine air.These concentrations differ in coal heating and cooling phase which was proven in the study.This paper presented the results of the experimental study on temperature distribution in a simulated coal bed in heating (50-250 ℃) and cooling (250-35 ℃) phases as well as its correlation to variations in concentration of gases released in these phases and flow rates of gases flowing through the coal bed.The research was performed on twenty-two samples of bituminous coals acquired from various coal beds of Polish coal mines.Considerable differences were observed between heating and cooling phases in terms of the concentrations of gases taken into account in calculations of self-combustion index.In the heating phase temperature increase resulted in the decrease of concentrations ratios of ethane,ethylene,propane,propylene and acetylene,while in the cooling phase these ratios increased systemically.The effect of air (in heating phase) and nitrogen (in cooling phase) flow rate on the self-ignition index CO/CO2 was also determined.
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论文发表日期：2020-03-30
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：15( 107-121 )
英文信息