不同自燃倾向性煤的指标气体产生规律实验研究
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摘要
为研究不同自燃倾向性煤的自燃指标气体变化规律,提高对煤早期自燃预测预报的准确度,采用程序升温实验系统,得到内蒙古褐煤、神东长焰煤、河南气煤及枣庄焦煤4种不同变质程度煤的氧化时间随温度的变化关系,以及指标气体浓度在煤氧化过程中的变化规律。结果表明:自燃倾向性最高的褐煤应以CO和乙烯作为煤自燃早期预报的首选指标气体;易自燃的长焰煤应采用乙烯和烯烷比为主、以CO为辅的煤自燃判定指标;自燃倾向性较低的气煤应以乙烯和烯烷比作为煤自燃预报指标;CO是自燃倾向性最低的焦煤的最佳自燃预报指标气体。
In order to study the variation laws of index gases for the spontaneous combustion of coal with different spontaneous combustion tendency,and improve the accuracy of prediction and forecast on the coal spontaneous combustion in early stage,the variation of oxidation time with temperature for four kinds of coal with different metamorphic degree including the Inner Mongolia lignite,Shendong long flame coal,Henan gas coal and Zaozhuang coking coal were obtained by using the temperature programmed experimental system,as well as the variation laws of concentration of index gases in the process of coal oxidation. The results showed that CO and ethylene should be taken as the preferred index gases in the early forecast of coal spontaneous combustion for lignite with the highest spontaneous combustion tendency. The judgment indexes of coal spontaneous combustion for the long flame coal which is easy to occur spontaneous combustion should take ethylene and the olefin/paraffin ratio as the primary,supplemented by CO. Ethylene and the olefin/paraffin ratio should be taken as the forecast indexes of coal spontaneous combustion for the gas coal with the lower spontaneous combustion tendency. CO was the best forecast index gas of spontaneous combustion for the coking coal with the lowest spontaneous combustion tendency.
In order to study the variation laws of index gases for the spontaneous combustion of coal with different spontaneous combustion tendency,and improve the accuracy of prediction and forecast on the coal spontaneous combustion in early stage,the variation of oxidation time with temperature for four kinds of coal with different metamorphic degree including the Inner Mongolia lignite,Shendong long flame coal,Henan gas coal and Zaozhuang coking coal were obtained by using the temperature programmed experimental system,as well as the variation laws of concentration of index gases in the process of coal oxidation. The results showed that CO and ethylene should be taken as the preferred index gases in the early forecast of coal spontaneous combustion for lignite with the highest spontaneous combustion tendency. The judgment indexes of coal spontaneous combustion for the long flame coal which is easy to occur spontaneous combustion should take ethylene and the olefin/paraffin ratio as the primary,supplemented by CO. Ethylene and the olefin/paraffin ratio should be taken as the forecast indexes of coal spontaneous combustion for the gas coal with the lower spontaneous combustion tendency. CO was the best forecast index gas of spontaneous combustion for the coking coal with the lowest spontaneous combustion tendency.
引文
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[2]王德明.矿井通风与安全[M].徐州:中国矿业大学出版社,2007.
[3]刘璐,梅国栋.基于灰色关联分析的煤自然发火气体预报指标研究[J].中国煤炭,2007,33(11):33-36.LIU Yu,MEI Guodong.Research on coal spontaneous combustion gas forecasting index based on grey relational analysis[J].China Coal,2007,33(11):33-36.
[4]何萍,王飞宇,唐修义,等.煤氧化过程中气体的形成特征与煤自燃指标气体选择[J].煤炭学报,1994(6):635-643.HE Ping,WANG Feiyu,TANG Xiuyi,et al.Gas foamation characteristics and coal Induction gas selection in coal oxidation processes[J].Journal of China Coal Society,1994(6):635-643.
[5]侯志勇.低温煤自燃标志性气体特征及其现场应用[J].世界有色金属,2017(4):186-187.HOU Zhiyong.Characteristics and application of the landmark gas of spontaneous combustion of low temperature coal[J].Chinese Nonferrous Metals,2017(4):186-187.
[6]许涛.煤自燃过程分段特性及机理的实验研究[D].徐州.中国矿业大学,2012.
[7]底翠翠,辛海会,李金帅.基于煤自燃倾向性的绝热氧化时间预测方法研究[J].科学技术与工程,2017,17(21):13-17.DI Cuicui,Xin Haihui,LI Jinshuai.Study on prediction method of adiabatic oxidation time based on spontaneous combustion of coal[J].Science&Technology and Engineering,2017,17(21):13-17.
[8]王德明.矿井火灾学[M].徐州:中国矿业大学出版社,2008:71.
[9]戴广龙.煤低温氧化过程气体产物变化规律研究[J].煤矿安全,2007,38(1):1-4.DAI Guanglong.Study on the variation of gas products during low temperature oxidation of coal[J].Coal Mine Safety,2007,38(1):1-4.
[10]郑东红,张帆.低温煤自燃标志性气体特征及其现场应用[J].内蒙古煤炭经济,2017(10):3-4.ZHENG Donghong,ZHANG Fan.Characteristics and application of signature gas of low temperature coal self-ignition[J].Inner Mongolia Coal Economics,2017(10):3-4.
[11]罗海珠,钱国胤.各煤种自然发火标志气体指标研究[J].煤矿安全,2003,34(9):5-10.LUO Haizhu,QIAN Guoyin.Study on Gas Indices of Natural Kilo Flags of Various Coal[J].Coal Mine Safety,2003,34(9):5-10.
[12]邵昊,蒋曙光,吴征艳,等.二氧化碳和氮气对煤自燃性能影响的对比试验研究[J].煤炭学报,2014,39(11):2244-2249.SHAO Hao,JIANG Shuguang,WU Zhengyan,et al.Comparative experimental study on the effect of carbon dioxide and nitrogen on the spontaneous combustion of coal[J].Journal of China Coal Society,2014,39(11):2244-2249.
[13]谭波,胡瑞丽,高鹏,等.煤自燃灾害气体指标的阶段特征试验研究[J].中国安全科学学报,2013,23(2):51.TAN Bo,HU Ruili,GAO Peng,et al.Study on phase characteristics of coal spontaneous combustion gas index[J].Chinese Journal of Safety Science,2013,23(2):51.
[14]罗伟.煤自燃标志气体的阶段特征实验研究[J].煤质技术,2016(3):50-54.LUO Wei.Experimental study on phase characteristics of gas for spontaneous combustion of coal[J].Transactions of Coal and Metallurgy,2016(3):50-54.
[15]武丕俭,张景钢,康怀宇.煤层自然发火指标气体的选择实验分析研究[J].华北科技学院学报,2010,7(4):25-29.WU Pijian,ZHANG Jinggang,KANG Huaiyu.Experimental analysis of selective spontaneous combustion index gas in coal seam[J].Journal of North China University of Science and Technology,2010,7(4):25-29.
[16]许延辉,许满贵,徐精彩.煤自燃火灾指标气体预测预报的几个关键问题探讨[J].矿业安全与环保,2005,32(1):16-18.XU Yanhui,XU Mangui,XU Jingcai.Discussion on some key problems of gas prediction for spontaneous combustion of coal[J].Majdron Safety and Environmental Protection,2005,32(1):16-18.
[17]梁运涛.煤炭自然发火标志气体指标体系研究[C]//全国煤矿安全学术年会会议,2007.
[18]赵晓明.煤低温氧化C2H4生成特性实验研究[D].太原:太原理工大学,2016.
[19]朱东明.煤自燃标志性气体实验及应用研究[D].邯郸:河北工程大学,2016.