气煤自燃特征参数规律研究
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摘要
为揭示气煤自燃特征参数规律,通过煤自燃标志性气体测定系统,测定气煤自燃标志性气体产生规律,对气煤自燃特征参数进行深度分析,得出了气煤自燃特征参数规律。结果表明:CO/CO_2的比值规律性良好,能反映气煤自燃的趋势;保德气煤的临界温度为42℃,干裂温度为101℃;CO产生率先缓慢增加后急剧增加,温度拐点为100℃;CO_2产生率随煤温升高而增大;CH4产生率随煤温升高先增大后减小,极值点煤温为130℃;煤温100℃前,耗氧速率线性缓慢增加,超过100℃,耗氧速率迅速增加;最大与最小放热强度随煤温升高而增大。基于以上研究,确立了气煤自燃特征参数规律,为科学有效地预防气煤自燃提供了理论依据。
To reveal the characteristic parameters laws of gas coal spontaneous combustion, the test system for spontaneous index gases was established to deeply analyze the characteristic parameters laws of gas coal spontaneous combustion. The results show that the laws of CO/CO_2 can reflect the trend of gas coal spontaneous combustion. The critical temperature of Baode gas coal is 42℃, and the cracking temperature is 101 ℃. The production rate of CO increases slowly then increases sharply and the temperature turning point is 100 ℃. The production rate of CO_2 increases with coal temperature. The production rate of CH4 increases firstly then decreases with the increase of coal temperature and the extreme point coal temperature is 130 ℃. The oxygen consumption rate increases slowly before 100 ℃, then increases rapidly when the coal temperature is higher than 100 ℃. In addition, the maximum and minimum exothermic strength increase with the increasing of coal temperature. Based on the above studies, the characteristic parameters laws of gas coal spontaneous combustion were obtained, and it provides a theoretical basis for scientific and effective prevention of gas coal spontaneous combustion.
To reveal the characteristic parameters laws of gas coal spontaneous combustion, the test system for spontaneous index gases was established to deeply analyze the characteristic parameters laws of gas coal spontaneous combustion. The results show that the laws of CO/CO_2 can reflect the trend of gas coal spontaneous combustion. The critical temperature of Baode gas coal is 42℃, and the cracking temperature is 101 ℃. The production rate of CO increases slowly then increases sharply and the temperature turning point is 100 ℃. The production rate of CO_2 increases with coal temperature. The production rate of CH4 increases firstly then decreases with the increase of coal temperature and the extreme point coal temperature is 130 ℃. The oxygen consumption rate increases slowly before 100 ℃, then increases rapidly when the coal temperature is higher than 100 ℃. In addition, the maximum and minimum exothermic strength increase with the increasing of coal temperature. Based on the above studies, the characteristic parameters laws of gas coal spontaneous combustion were obtained, and it provides a theoretical basis for scientific and effective prevention of gas coal spontaneous combustion.
引文
[1]梁运涛,侯贤军,罗海珠,等.我国煤矿火灾防治现状及发展对策[J].煤炭科学技术,2016,44(6):1-6.
[2]陈鹏,张弛,张浪,等.煤自燃倾向性测试方法研究进展与展望[J].煤矿安全,2016,47(3):164-168.
[3]玄伟伟,王倩,张建胜.褐煤自燃倾向测定及其低温氧化反应过程研究[J].煤炭学报,2016,41(10):2460.
[4]仲晓星,王德明,戚绪尧,等.煤自燃倾向性的氧化动力学测定方法研究[J].中国矿业大学学报,2009,38(6):789-793.
[5] ZHU J, NING H,LI D. The Relationship between Oxy-gen Consumption Rate and Temperature during CoalSpontaneous Combustion[J]. Safety Science, 2012, 50(4):842-845.
[6]徐永亮,王兰云,宋志鹏,等.基于交叉点法的煤自燃低温氧化阶段特性和关键参数[J].煤炭学报,2017,42(4):935-941.
[7]陈鹏,薛改凤,项茹,等.气煤性质与粒度对焦炭显微结构的影响[J].燃料与化工,2011,42(5):12-14.
[8]张辛亥,徐精彩.煤的耗氧速度及其影响因素恒温实验研究[J].西安科技大学学报,2002,22(3):243.
[9]吕智海,王占元.矿井火灾防治[M].北京:煤炭工业出版社,2007:132-134.
[10]徐精彩,许满贵,文虎,等.煤氧复合速率变化规律研究[J].煤炭转化,2000,23(3):63-66.
[11]朱红青,郭艾东,屈丽娜.煤热动力学参数、特征温度与挥发分关系的试验研究[J].中国安全科学学报,2012,22(3):55.
[12]邓军,赵婧昱,张嬿妮.基于指标气体增长率分析法测定煤自燃特征温度[J].煤炭科学技术,2014,42(7):49-52.
[2]陈鹏,张弛,张浪,等.煤自燃倾向性测试方法研究进展与展望[J].煤矿安全,2016,47(3):164-168.
[3]玄伟伟,王倩,张建胜.褐煤自燃倾向测定及其低温氧化反应过程研究[J].煤炭学报,2016,41(10):2460.
[4]仲晓星,王德明,戚绪尧,等.煤自燃倾向性的氧化动力学测定方法研究[J].中国矿业大学学报,2009,38(6):789-793.
[5] ZHU J, NING H,LI D. The Relationship between Oxy-gen Consumption Rate and Temperature during CoalSpontaneous Combustion[J]. Safety Science, 2012, 50(4):842-845.
[6]徐永亮,王兰云,宋志鹏,等.基于交叉点法的煤自燃低温氧化阶段特性和关键参数[J].煤炭学报,2017,42(4):935-941.
[7]陈鹏,薛改凤,项茹,等.气煤性质与粒度对焦炭显微结构的影响[J].燃料与化工,2011,42(5):12-14.
[8]张辛亥,徐精彩.煤的耗氧速度及其影响因素恒温实验研究[J].西安科技大学学报,2002,22(3):243.
[9]吕智海,王占元.矿井火灾防治[M].北京:煤炭工业出版社,2007:132-134.
[10]徐精彩,许满贵,文虎,等.煤氧复合速率变化规律研究[J].煤炭转化,2000,23(3):63-66.
[11]朱红青,郭艾东,屈丽娜.煤热动力学参数、特征温度与挥发分关系的试验研究[J].中国安全科学学报,2012,22(3):55.
[12]邓军,赵婧昱,张嬿妮.基于指标气体增长率分析法测定煤自燃特征温度[J].煤炭科学技术,2014,42(7):49-52.