外加水分含量对煤低温氧化影响试验研究  

Experimental study on effects of plus water content on low-temperature oxidation of coal

作　　者：李宛鸿 褚廷湘 刘文德 周丽萍 曾艳铭 LI Wanhong;CHU Tingxiang;LIU Wende;ZHOU Liping;ZENG Yanming(School of Metallurgy and Mining,Kunming Metallurgy College,Kunming Yunnan 650033,China;School of Safety Engineering,North China Institute of Science and Technology,Sanhe Hebei 065201,China;Construction Engineering College,Yunnan Technology and Business University,Kunming Yunnan 651701,China)

机构地区：[1]昆明冶金高等专科学校冶金与矿业学院,云南昆明650033 [2]华北科技学院安全工程学院,河北三河065201 [3]云南工商学院建筑工程分院,云南昆明651701

出　　处：《中国安全科学学报》2019年第9期84-89,共6页China Safety Science Journal

基　　金：国家自然科学基金资助(51774114);中央高校基本科研业务费(3142018028,3142018002);昆明冶金高等专科学校科研基金资助(2017xjzk04);云南省教育厅科学研究基金资助(2019J0895)

摘　　要：为明确外加水分对煤自燃氧化过程的影响,通过煤低温氧化试验与热分析技术,测试CO发生量、C2H4发生量、耗氧速度、交叉点温度、吸热峰值温度等指标,并分析不同水分含量下煤样的低温氧化特征。试验结果表明:外在水分含量为(0,9%)时,耗氧速度及氧化气体发生量均大于自然风干煤样,水分含量的增加促进了煤自燃过程的发生;外加水分含量为(9%,25%)时,耗氧速度及氧化气体发生量低于自然风干煤样,从而抑制了煤样的低温氧化;在所有试验煤样中,9%水分含量煤样的交叉点温度、吸热峰值温度试验结果最小。因此,采取水力灭火措施时,应关注煤体的增湿效果,确保遗煤处于相应的含水状态。In order to determine inhibition effects of plus water content on coal's self combustion,low temperature oxidation experiment and thermal analysis technique were adopted to test indicators like carbon monoxide occurrence,ethylene production,oxygen consumption rate,crossing point and endothermal peak temperature,and low-temperature oxidation characteristics of coal samples with different water content were analyzed.The experimental results show that oxygen consumption and oxidation gas production are larger compared with natural air-dried coal samples when content is in the range of(0,9%),and increase of water content speeds up spontaneous combustion of coal.Oxygen consumption and oxidation gas production are smaller in the range of(9,25%),and spontaneous combustion of coal will be inhibited by increase of water content.Crossing point and endothermic peak temperature reach minimum with 9%of water content within all tested coal samples.Therefore,when adopting hydraulic fire-fighting measures,attention should be paid to humidifying effects of coal to ensure that residual coal is with corresponding water content.

关 键 词：煤自燃 外加水分 低温氧化 采空区 耗氧速度 

分 类 号：X936[环境科学与工程—安全科学]