| 利用热重法研究不同氧浓度对煤自燃特性的影响 |
| |
| 引用本文： | 文虎,陆彦博,刘文永.利用热重法研究不同氧浓度对煤自燃特性的影响[J].矿业安全与环保,2021,48(1):1-5,10. |
| |
| 作者姓名： | 文虎 陆彦博 刘文永 |
| |
| 作者单位： | 西安科技大学 安全科学与工程学院,陕西 西安710054;国家矿山应急救援西安研究中心,陕西 西安710054;陕西省煤火灾害防治重点实验室,陕西 西安710054;西安科技大学 安全科学与工程学院,陕西 西安710054;陕西省煤火灾害防治重点实验室,陕西 西安710054 |
| |
| 基金项目： | 国家自然科学基金项目(51974240)。 |
| |
| 摘 要： | 煤自燃受到多种因素影响,为了研究煤与氧气反应的机理,通过热重(TG)实验测试了褐煤、1/3焦煤和无烟煤在不同氧气体积分数条件下的自燃特性,分析了煤样氧化过程的特征温度、质量损失、热效应及热反应动力学参数.研究结果表明:不同煤阶的煤样对氧气的化学响应特征不同,煤阶越高,越难以发生氧化反应,体现为特征温度增大,放热峰值减小...
|
| 关 键 词： | 煤自燃 贫氧 热重法 特征温度 热效应 动力学分析 |
Study on the effects of different oxygen concentrations on spontaneous combustion characteristics of coal with thermogravimetric method |
| |
| WEN Hu,LU Yanbo,LIU Wenyong.Study on the effects of different oxygen concentrations on spontaneous combustion characteristics of coal with thermogravimetric method[J].Mining Safety & Environmental Protection,2021,48(1):1-5,10. |
| |
| Authors: | WEN Hu LU Yanbo LIU Wenyong |
| |
| Affiliation: | (College of Safety Science and Engineering,Xi’an University of Science and Technology,Xi’an 710054,China;State Mine Emergency Rescue(Xi’an)Research Center,Xi’an 710054,China;Key Laboratory for Prevention and Control of Coal Fires in Shaanxi Province,Xi’an 710054,China) |
| |
| Abstract: | Spontaneous combustion of coal was affected by many factors.In order to study the mechanism of reaction between coal and oxygen,thermogravimetric(TG)experiments were conducted to test the spontaneous combustion characteristics of lignite,1/3 coking coal and anthracite under different oxygen volume fractions.The characteristic temperature,mass loss,thermal effect and kinetic parameters of coal sample oxidation process were analyzed.The results show that the response characteristics of different coal ranks on oxygen volume fraction are inconsistent,the higher the degree of coal,the more difficult it is for oxidation to occur,it shows that the characteristic temperature increases,the peak value of exothermic heat decreases,and shifts to the high temperature region;with the increase of oxygen volume fraction,it is easier for coal to react with oxygen,and the heat release of lignite,1/3 coking coal and anthracite increase to 14131 J/g,11424 J/g and 12263 J/g respectively;the decomposition and combustion stage of coal under intense heat reaction is analyzed,and it is found that the higher the coal rank is,the higher the apparent activation energy is,the apparent activation energy of each coal sample fluctuates under different oxygen volume fraction. |
| |
| Keywords: | coal spontaneous combustion oxygen deficient thermogravimetric method characteristic temperature thermal effect kinetic analysis |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
