贫氧条件下煤自燃特性的热重-红外实验研究
发布时间：2018-11-13 11:19
【摘要】：为研究煤粉在贫氧条件下的自燃特性,利用TG/DSC-FTIR联用技术测试了顾北气煤在不同氧气浓度气氛下的燃烧放热过程,分析了贫氧条件下特征温度点、TG、DSC曲线的变化规律,通过红外光谱技术研究了CO、CO_2的释放规律,采用积分法计算了活性温度点到着火点的活化能变化规律。研究表明:贫氧条件下,煤氧复合反应仍然能够持续,特征温度点在高温氧化阶段呈增大趋势,TG、DSC曲线向高温区偏移,CO、CO_2的峰值温度升高,增重阶段至燃烧阶段的活化能变化不大。
[Abstract]:In order to study the spontaneous combustion characteristics of pulverized coal under the condition of poor oxygen, the combustion and exothermic process of Gubei gas coal in different oxygen concentration atmosphere was tested by TG/DSC-FTIR technique. The characteristic temperature point, TG, under the condition of oxygen deficiency were analyzed. The variation of DSC curve was studied by infrared spectroscopy, and the activation energy from active temperature to ignition point was calculated by integral method. The results show that the complex reaction of coal and oxygen can continue under the condition of oxygen deficiency, the characteristic temperature point increases in the high temperature oxidation stage, the TG,DSC curve shifts to the high temperature region, and the peak temperature of CO,CO_2 increases. The activation energy from the weight increasing stage to the combustion stage has little change.
【作者单位】： 西安科技大学安全科学与工程学院;西部矿井开采及灾害防治教育部重点实验室;
【基金】：国家自然科学基金资助项目(51404192) 中国博士后科学基金资助项目(2015T81043) 陕西省自然科学基础研究资助项目(2015JQ5174)
【分类号】：TD752.2
本文编号：2328954
[Abstract]:In order to study the spontaneous combustion characteristics of pulverized coal under the condition of poor oxygen, the combustion and exothermic process of Gubei gas coal in different oxygen concentration atmosphere was tested by TG/DSC-FTIR technique. The characteristic temperature point, TG, under the condition of oxygen deficiency were analyzed. The variation of DSC curve was studied by infrared spectroscopy, and the activation energy from active temperature to ignition point was calculated by integral method. The results show that the complex reaction of coal and oxygen can continue under the condition of oxygen deficiency, the characteristic temperature point increases in the high temperature oxidation stage, the TG,DSC curve shifts to the high temperature region, and the peak temperature of CO,CO_2 increases. The activation energy from the weight increasing stage to the combustion stage has little change.
【作者单位】： 西安科技大学安全科学与工程学院;西部矿井开采及灾害防治教育部重点实验室;
【基金】：国家自然科学基金资助项目(51404192) 中国博士后科学基金资助项目(2015T81043) 陕西省自然科学基础研究资助项目(2015JQ5174)
【分类号】：TD752.2
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1 刘国林，，杨立兴;矿井高氮贫氧窒息事故研究[J];中国煤炭;1996年05期
本文编号：2328954
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