煤矿运输胶带热解动力学参数研究  

Study on pyrolysis kinetic parameters of coal mine transport belt

作　　者：张铎 刘茂霞 呼少平 王振平 宋先明[3] 王伟峰 ZHANG Duo;LIU Maoxia;HU Shaoping;WANG Zhenping;SONG Xianming;WANG Weifeng(School of Safety Science and Engineering,Xi’an University of Science and Technology,Xi’an 710054,China;Shaanxi Coal Group Shenmu Zhangjiamao Mining Co.,Ltd.,Yulin 719000,China;Yanzhou Coal Mining Co.,Ltd.,Jining 272000,China)

机构地区：[1]西安科技大学安全科学与工程学院,陕西西安710054 [2]陕煤集团神木张家峁矿业有限公司,陕西榆林719000 [3]兖州煤业股份有限公司,山东济宁272000

出　　处：《矿业安全与环保》2023年第2期52-58,共7页Mining Safety & Environmental Protection

摘　　要：为构建矿井胶带火灾早期预警体系,防控巷道外因火灾事故,利用热重—傅里叶红外光谱联用实验,结合热解动力学,研究5、10、15、20 K/min 4种升温速率下胶带的热解历程。结果表明:不同升温速率下的热重(TG/DTG)曲线、气体产物等具有相似规律和趋势,随升温速率增加各参量特征值向高温方向滞后;胶带热解经历2个明显失重阶段,第一失重阶段发生交联缩聚热解反应,活化能E在105~107 kJ/mol,指前因子为15.92 min^(-1),第二失重阶段发生脱链解聚热解吸热反应和挥发分氧化放热反应,活化能E在130~220 kJ/mol,指前因子为37.13 min^(-1),高于第一失重阶段,两阶段热解过程可用Avrami-Erofeev方程表征。In order to construct the early warning system of mine belt fire and prevent the external fire accident of roadway,the pyrolysis process of belt at 5 K/min,10 K/min,15 K/min,20 K/min heating rates was studied by thermogravimetric-Fourier infrared spectroscopy experiment combined with pyrolysis kinetics.The results show that the TG/DTG curves and gas products at different heating rates have similar laws and trends,and the eigenvalues of each parameter lag to the high temperature direction with the increase of heating rate.The pyrolysis of tape experiences two obvious weight loss stages.The first weight loss stage may occur cross-linked polycondensation pyrolysis reaction.The activation energy E ranges from 105 kJ/mol to 107 kJ/mol and the pre-exponential factor is 15.92 min^(-1).The endothermic reaction of dechained pyrolysis and exothermic reaction of volatile oxidation may occur in the second weight loss stage.The activation energy E ranges from 130 kJ/mol to 220 kJ/mol and the pre-exponential factor is 37.13 min^(-1),which is higher than that in the first weight loss stage.The two-stage pyrolysis process can be characterized by the Avrami-Erofeev equation.

关 键 词：矿井胶带火灾 热重分析(TG) TG-FTIR 热动力学 动力学参数 多升温速率 

分 类 号：TD528[矿业工程—矿山机电]