粒径对煤氧化升温进程影响的试验研究
|
摘要
为研究粒径对煤氧化升温进程的影响,利用程序升温试验系统,分析潞安集团李阳煤矿15号煤层5种不同粒径煤样氧化升温进程中O_2,CO,C_2H_4等气体的生成规律,并计算了不同粒径煤样的耗氧速率和CO,CO_2,C_2H_4气体的产生速率以及煤自燃倾向性判定指数。结果表明:该煤层自燃临界温度约80℃,干裂温度约135℃,气体产生速率临界温度约160℃;从试验初期到干裂温度段,各煤样气体生成总量变化不大,超过干裂温度后,气体生成量变化幅度增大;煤样在超过气体产生速率临界温度后,各气体的产生速率开始有较大幅度增加,且粒径越小的煤样气体产生速率的变化幅度越大;随着煤样粒径的减小,煤样和O_2反应面积增大,交叉点温度相应降低,煤样粒径对煤自燃倾向性有明显影响。
In order to study the effect of particle size on oxidation heating process of coal,formation regularity of O_2,CO,C_2H_4 and other gases in temperature-rising oxidation process of the coal samples with different particle sizes of five types in Liyang Mine,Lu'an Coal Group were studied.Oxygen consumption rate of coal samples with different particle sizes,the formation rate of CO,CO_2,C_2H_4 gas and the judging index of coal spontaneous combustion tendency were calculated.The results showed that:the critical temperature of spontaneous combustion,dry cracking and gas formation rate of the coal seam were about 80 ℃,135 ℃ and 160 ℃ respectively.From the initial stage to the dry cracking temperature section,total gas production of all coal samples changed a little at the beginning,and then the variety of gas production increased after exceeding the dry cracking temperature.Furthermore,with the decrease of coal sample particle size,the rate of change in gas generation rate increased.With the decrease of coal sample particle size,the oxygen reaction area of coal sample increased,while the temperature of intersection point decreased correspondingly.The particle size of coal sample had obvious influence on coal spontaneous combustion tendency.
In order to study the effect of particle size on oxidation heating process of coal,formation regularity of O_2,CO,C_2H_4 and other gases in temperature-rising oxidation process of the coal samples with different particle sizes of five types in Liyang Mine,Lu'an Coal Group were studied.Oxygen consumption rate of coal samples with different particle sizes,the formation rate of CO,CO_2,C_2H_4 gas and the judging index of coal spontaneous combustion tendency were calculated.The results showed that:the critical temperature of spontaneous combustion,dry cracking and gas formation rate of the coal seam were about 80 ℃,135 ℃ and 160 ℃ respectively.From the initial stage to the dry cracking temperature section,total gas production of all coal samples changed a little at the beginning,and then the variety of gas production increased after exceeding the dry cracking temperature.Furthermore,with the decrease of coal sample particle size,the rate of change in gas generation rate increased.With the decrease of coal sample particle size,the oxygen reaction area of coal sample increased,while the temperature of intersection point decreased correspondingly.The particle size of coal sample had obvious influence on coal spontaneous combustion tendency.
引文
[1] 王德明.矿井火灾学[M].徐州:中国矿业大学出版社,2008.WANG D M.Mine fire science[M].Xuzhou:China University of Mining and Technology Press,2008.
[2] 余明高.矿井火灾防治[M].北京:国防工业出版社,2013.YU M G.Mine fire prevention[M].Beijing:National Defense Industry Press,2013.
[3] 余明高,杜海刚,褚廷湘,等.特厚易燃煤层初采期自燃危险区域判定研究[J].河南理工大学学报(自然科学版),2013,32(4):385-390.YU M G,DU H G,CHU T X,et al.Research on the judgment for the spontaneous combustion hazard zone in easily spontaneous combustion and extremely thick coal seam during the initial mining stage[J].Journal of Henan Polytechnic University(Nature Science),2013,32(4):385-390.
[4] 姜秀民,李巨斌,邱健荣.煤粉颗粒粒度对煤质分析特性与燃烧特性的影响[J].煤炭学报,1999,24(6):644-647.JIANG X M,LI J B,QIU J R.The influence of particle size on compositions analyzing and combustion characteristics of pulverized coal[J].Journal of China Coal Society,1999,24(6):644-647.
[5] 张骁博,赵虹,杨建国.不同粒径煤粉煤质变化及燃烧特性研究[J].煤炭学报,2011,36(6):999-1003.ZHANG X B,ZHAO H,YANG J G.Study on the variation of coal properties for different coal diameters and its effects on combustion characteristics[J].Journal of China Coal Society,2011,36(6):999-1003.
[6] 魏砾宏,李润东,李爱民,等.超细煤粉着火特性的热重分析[J].煤炭学报,2008,33(11):1296-1300.WEI L H,LI R D,LI A M,et al.Study on ignition characteristics of micro-pulverized coal by thermogravimerty[J].Journal of China Coal Society,2008,33(11):1296-1300.
[7] 马砺,任立峰,韩力,等.粒度对采空区煤自燃极限参数的影响试验研究[J].煤炭科学技术,2015,43(06):59-64.MA L,REN L F,HAN L,et al.Experiment study on partical size affected to coal spontaneous combustion limit parameters in goaf[J].Coal Science and Technology,2015,43(06):59-64.
[8] 秦跃平,宋宜猛,杨小彬,等.粒度对采空区遗煤氧化速度影响的实验研究[J].煤炭学报,2010,35(s1):132-135.QIN Y P,SONG Y M,YANG X B,et al.Experimental study on coal granularity influencing oxidation rate in goaf[J].Journal of China Coal Society,2010,35(s1):132-135.
[9] 邓军,徐精彩,李莉,等.煤的粒度与耗氧速度关系的实验研究[J].西安交通大学学报,1999(12):106-107.DENG J,XU J C,LI L,et al.Investigation on the Relation of the Rate of Oxygen Consumption and the Size of Coal Sample[J].Journal of XI’AN Jiaotong University,1999(12):106-107.
[10] 张春,题正义,李宗翔.粒径对松散煤体自燃影响的试验分析[J].燃烧科学与技术,2014,20(5):406-411.ZHANG C,TI Z Y,LI Z X.Experimental study on particle size influencing loose coal spontaneous combustion[J].Journal of Combustion Science and Technology,2014,12(5):406-411.
[11] YI B J,ZHANG L Q,MAO Z H,et al.Effect of the particle size on combustion characteristics of pulverized coal in an O2/CO2 atmosphere[J].Fuel Processing Technology,2014,128:17-27.
[12] 易宝军,张立麒,黄芳,等.不同粒径煤粉在O2/CO2气氛下的燃烧特性[J].燃烧科学与技术,2013,19(3):248-253.YI B J,ZHANG L Q,HUANG F,et al.Combustion characteristics of pulverized coal with different particle sizes in O2 /CO2 atmosphere[J].Journal of Combustion Science and Technology,2013,19(3):248-253.
[13] KANDASAMY JAYARAMAN,MUSTAFA VERSAN KOK,ISKENDER GOKALP.Pyrolysis,combustion and gasification studies of different sized coal particles using TGA-MS[J].Applied Thermal Engineering,2017,125:1446-1455.
[14] 张晓明,吴琦,张河猛,等.粒径对褐煤自燃阶段临界温度影响的试验研究[J].中国安全科学学报,2018,28(4):36-41.ZHANG X M,WU Q,ZHANG H M,et al.Experimental study on effect of particle size on lignite critical self-ignition temperature[J].China Safety Science Journal,2018,28(4):36-41.
[15] 余明高,袁壮,褚廷湘,等.不同自燃性煤氧化阶段的表征差异[J].重庆大学学报,2017,40(2):37-44.YU M G,YUAN Z,CHU T X,et al.Characterization difference of coals with different spontaneous combustion tendencies during oxidation stage[J].Journal of Chongqing University,2017,40(2):37-44.
[16] 文虎,徐精彩,葛玲梅,等.煤自燃性测试技术及数值分析[J].北京科技大学学报,2001,23(6):499-501.WEN H,XU J C,GE L M,et al.Technique of measurement and test of coal spontaneous combustion characteristic and numerical analysis[J].Journal of University of Science and Technology Beijing,2001,23(6):499-501.
[17] 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.DENG J,ZHAO J Y,ZHANG Y N.Study on determination of coal spontaneous combustion characteristic temperature based on analysis method of index gas growth-rate[J].Coal Science and Technology,2014,42(7):49-52.
[18] 张嬿妮,陈龙,邓军,等.淮南矿区主采煤层自燃氧化特性试验研究[J].安全与环境学报,2018,18(4):1296-1300.ZHANG Y N,CHEN L,DENG J,et al.Experimental observation and examination of the spontaneous combustion oxidation features of the main coal seam in Huainan mining area[J].Journal of Safety and Environment,2018,18(4):1296-1300.
[19] 徐精彩,张辛亥,文虎,等.程序升温实验中用键能变化量估算煤的氧化放热强度[J].火灾科学,1999,8(4):61-65.XU J C,ZHANG X H,WEN H,et al.Heat emit intensity of coal oxidation evaluated through bond energy change in programmed heat experiment[J].Fire Safety Science,1999,8(4):61-65.
[20] 余明高,马梳珍,褚廷湘.煤粒径对气体产生规律和自燃倾向性影响研究[J].河南理工大学学报(自然科学版),2016,35(1):1-9.YU M G,MA S Z,CHU T X.Influence study of coal particle size on the gases production rule and spontaneous combustion tendency characteristics[J].Journal of Henan Polytechnic University(Nature Science),2016,35(1):1-9.
[2] 余明高.矿井火灾防治[M].北京:国防工业出版社,2013.YU M G.Mine fire prevention[M].Beijing:National Defense Industry Press,2013.
[3] 余明高,杜海刚,褚廷湘,等.特厚易燃煤层初采期自燃危险区域判定研究[J].河南理工大学学报(自然科学版),2013,32(4):385-390.YU M G,DU H G,CHU T X,et al.Research on the judgment for the spontaneous combustion hazard zone in easily spontaneous combustion and extremely thick coal seam during the initial mining stage[J].Journal of Henan Polytechnic University(Nature Science),2013,32(4):385-390.
[4] 姜秀民,李巨斌,邱健荣.煤粉颗粒粒度对煤质分析特性与燃烧特性的影响[J].煤炭学报,1999,24(6):644-647.JIANG X M,LI J B,QIU J R.The influence of particle size on compositions analyzing and combustion characteristics of pulverized coal[J].Journal of China Coal Society,1999,24(6):644-647.
[5] 张骁博,赵虹,杨建国.不同粒径煤粉煤质变化及燃烧特性研究[J].煤炭学报,2011,36(6):999-1003.ZHANG X B,ZHAO H,YANG J G.Study on the variation of coal properties for different coal diameters and its effects on combustion characteristics[J].Journal of China Coal Society,2011,36(6):999-1003.
[6] 魏砾宏,李润东,李爱民,等.超细煤粉着火特性的热重分析[J].煤炭学报,2008,33(11):1296-1300.WEI L H,LI R D,LI A M,et al.Study on ignition characteristics of micro-pulverized coal by thermogravimerty[J].Journal of China Coal Society,2008,33(11):1296-1300.
[7] 马砺,任立峰,韩力,等.粒度对采空区煤自燃极限参数的影响试验研究[J].煤炭科学技术,2015,43(06):59-64.MA L,REN L F,HAN L,et al.Experiment study on partical size affected to coal spontaneous combustion limit parameters in goaf[J].Coal Science and Technology,2015,43(06):59-64.
[8] 秦跃平,宋宜猛,杨小彬,等.粒度对采空区遗煤氧化速度影响的实验研究[J].煤炭学报,2010,35(s1):132-135.QIN Y P,SONG Y M,YANG X B,et al.Experimental study on coal granularity influencing oxidation rate in goaf[J].Journal of China Coal Society,2010,35(s1):132-135.
[9] 邓军,徐精彩,李莉,等.煤的粒度与耗氧速度关系的实验研究[J].西安交通大学学报,1999(12):106-107.DENG J,XU J C,LI L,et al.Investigation on the Relation of the Rate of Oxygen Consumption and the Size of Coal Sample[J].Journal of XI’AN Jiaotong University,1999(12):106-107.
[10] 张春,题正义,李宗翔.粒径对松散煤体自燃影响的试验分析[J].燃烧科学与技术,2014,20(5):406-411.ZHANG C,TI Z Y,LI Z X.Experimental study on particle size influencing loose coal spontaneous combustion[J].Journal of Combustion Science and Technology,2014,12(5):406-411.
[11] YI B J,ZHANG L Q,MAO Z H,et al.Effect of the particle size on combustion characteristics of pulverized coal in an O2/CO2 atmosphere[J].Fuel Processing Technology,2014,128:17-27.
[12] 易宝军,张立麒,黄芳,等.不同粒径煤粉在O2/CO2气氛下的燃烧特性[J].燃烧科学与技术,2013,19(3):248-253.YI B J,ZHANG L Q,HUANG F,et al.Combustion characteristics of pulverized coal with different particle sizes in O2 /CO2 atmosphere[J].Journal of Combustion Science and Technology,2013,19(3):248-253.
[13] KANDASAMY JAYARAMAN,MUSTAFA VERSAN KOK,ISKENDER GOKALP.Pyrolysis,combustion and gasification studies of different sized coal particles using TGA-MS[J].Applied Thermal Engineering,2017,125:1446-1455.
[14] 张晓明,吴琦,张河猛,等.粒径对褐煤自燃阶段临界温度影响的试验研究[J].中国安全科学学报,2018,28(4):36-41.ZHANG X M,WU Q,ZHANG H M,et al.Experimental study on effect of particle size on lignite critical self-ignition temperature[J].China Safety Science Journal,2018,28(4):36-41.
[15] 余明高,袁壮,褚廷湘,等.不同自燃性煤氧化阶段的表征差异[J].重庆大学学报,2017,40(2):37-44.YU M G,YUAN Z,CHU T X,et al.Characterization difference of coals with different spontaneous combustion tendencies during oxidation stage[J].Journal of Chongqing University,2017,40(2):37-44.
[16] 文虎,徐精彩,葛玲梅,等.煤自燃性测试技术及数值分析[J].北京科技大学学报,2001,23(6):499-501.WEN H,XU J C,GE L M,et al.Technique of measurement and test of coal spontaneous combustion characteristic and numerical analysis[J].Journal of University of Science and Technology Beijing,2001,23(6):499-501.
[17] 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.DENG J,ZHAO J Y,ZHANG Y N.Study on determination of coal spontaneous combustion characteristic temperature based on analysis method of index gas growth-rate[J].Coal Science and Technology,2014,42(7):49-52.
[18] 张嬿妮,陈龙,邓军,等.淮南矿区主采煤层自燃氧化特性试验研究[J].安全与环境学报,2018,18(4):1296-1300.ZHANG Y N,CHEN L,DENG J,et al.Experimental observation and examination of the spontaneous combustion oxidation features of the main coal seam in Huainan mining area[J].Journal of Safety and Environment,2018,18(4):1296-1300.
[19] 徐精彩,张辛亥,文虎,等.程序升温实验中用键能变化量估算煤的氧化放热强度[J].火灾科学,1999,8(4):61-65.XU J C,ZHANG X H,WEN H,et al.Heat emit intensity of coal oxidation evaluated through bond energy change in programmed heat experiment[J].Fire Safety Science,1999,8(4):61-65.
[20] 余明高,马梳珍,褚廷湘.煤粒径对气体产生规律和自燃倾向性影响研究[J].河南理工大学学报(自然科学版),2016,35(1):1-9.YU M G,MA S Z,CHU T X.Influence study of coal particle size on the gases production rule and spontaneous combustion tendency characteristics[J].Journal of Henan Polytechnic University(Nature Science),2016,35(1):1-9.