基于热重分析的煤升温氧化及煤氧复合特性分析  

Analytic investigation of the coal self-combustion and oxidation characteristic features based on the thermogravimetric analysis

作　　者：尤飞 皇甫文豪[1,2] 王振华 邵玥 YOU Fei;HUANGFU Wen-hao;WANG Zhen-hua;SHAO Yue(Jiangsu Key laboratory of Urban and Industrial Safety,College of Safety Science and Engineering,Nanjing Tech University,Nanjing 210009,China;Fire Science and Engineering Institute,Nanjing Tech University,Nanjing 210009,China;Key Laboratory of Mine Thermo-motive Disaster and Prevention,Ministry of Education,Liaoning Technical University,Fuxin 123000,Liaoning,China)

机构地区：[1]南京工业大学安全科学与工程学院、江苏省城市与工业安全重点实验室,南京210009 [2]南京工业大学火灾与消防工程研究所,南京210009 [3]辽宁工程技术大学矿山热动力灾害与防治教育部重点实验室,辽宁阜新123000

出　　处：《安全与环境学报》2018年第4期1312-1315,共4页Journal of Safety and Environment

基　　金：国家自然科学基金项目(51376089);辽宁工程技术大学矿山热动力灾害与防治教育部重点实验室资助课题(JSK200205)

摘　　要：为了探讨煤氧化自燃特性,将来自平顶山、某电厂（混合煤）、山西的3类共7组煤样在干空气氛围中以固定升温速率（20℃/min）进行热重试验。结果表明：煤样在含氧氛围中的升温氧化过程可分为吸附自热和氧化增重2个阶段;同源煤样的自燃点（T）与煤氧复合作用时间（t）随着火特性指标（FZ）增大而减小,FZ越大,煤氧复合越容易,其自燃点也越低;对于非同源煤,除PDS2之外,山西煤、平顶山煤、电厂混合煤之间表现出良好的线性关系;建立了无量纲化自燃点（T＇）、煤氧复合作用时间（t＇）与煤氧复合难易指标（Icod）的函数关系,Icod可较好地反映不同品质煤样的自燃难易程度,Icod越小煤氧复合越容易进行,在7组试验煤样中PDS1的Icod最大（1.08）,山西煤次之,电厂混合煤的Icod最小（0.80）,表明电厂混合煤具有更高的自燃倾向性。In order to investigate the oxidation and spontaneous combustion characteristic features of the different qualities of coals,we have chosen 7 kinds of coal samples from Pingdingshan（ Henan）,and some other coal samples from Shanxi from some power plants（ mixed coal） for their constant heating rates under the temperature of 20 ℃/min under open air through some Thermogravimetric Analysis experiments. As a result,we have established a reasonable index to estimate their spontaneous combustion susceptibility. The experimental results indicate that the pyrolysis process of long-flame coals under the oxygen atmosphere can be divided into two stages： adsorption and self-combustion（ 130 ℃）,with their oxidation factors weighed at the temperatures between 130 ℃ and 290 ℃. We have also found that the spontaneous combustion point（ T） and the coal-oxidation time（ t） of the homologous coals tends to decrease with the increase of the coal universal ignition index（ FZ）. Therefore,the greater the universal ignition index（ FZ）,the easier would be the coal-oxidation temperature and the lower the ignition temperature will be,which can be a variation trend with a greater and greater significance with the increase of the universal ignition index. On the other hand,for the non-homologous coals,PDS2 would have lower ignition temperature and lower coal-oxidation time,that is,about303. 5 ℃ and 12. 7 min. On other hand,it would be quite different with other coal samples such as those from Shanxi coal mines,Pingdingshan coal mine. The power plants the mixed coals provided by other coalmines or power plants may show a nice linear relationship. In addition,mac-characteristic parameter,such as the spontaneous combustion points and the coal-oxidation time seem to be nondimensionalized. The function relation of coal-oxidation difficult index（ Icod） with dimensionless ignition temperature（ T＇） and coaloxidation time（ t＇） was established. Founded that Icodcan reflect the coal-oxidation difficul

关 键 词：安全工程 着火特性指标 氧化自燃 热重分析 煤氧复合难易程度 混合煤 

分 类 号：X915.5[环境科学与工程—安全科学] X936