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中国电机工程学报 2007, 27(29) 17-22 DOI:
ISSN: 0258-8013 CN: 11-2107/TM |
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| 发电 |
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石煤燃烧特性及其类属研究 |
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刘建忠 张保生 周俊虎 冯展管 岑可法 |
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能源清洁利用国家重点实验室(浙江大学) 中国矿业大学机电学院 能源清洁利用国家重点实验室(浙江大学) 能源清洁利用国家重点实验室(浙江大学) 能源清洁利用国家重点实验室(浙江大学) |
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摘要：
采用热重分析方法对3种石煤的燃烧特性和燃烧动力学进行研究，并对石煤的类属进行了探讨。结果表明：石煤具有高灰、高硫和低热值的特点。石煤的燃烧特性与无烟煤相近，但比无烟煤差。采用Popescu法对石煤的燃烧机理进行分析，表明其燃烧过程主要受扩散控制，三维扩散模型控制的反Jander方程是最佳机理函数。采用等转化率法对石煤不同燃烧阶段的活化能进行考察，表明其在着火、燃烧和燃尽各阶段都需要很高的活化能，进一步证明了石煤的燃烧过程是受扩散控制的。以干燥无灰基挥发分Vdaf作为分类标准来确定石煤的类属是不恰当的；根据煤阶和燃烧特性及动力学分析判断，石煤属于高变质的劣质无烟煤。 |
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关键词：
石煤
燃烧特性
燃烧动力学
类属
热重法
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Abstract:
Thermogravimetry is applied to analyze the combustion characteristics and combustion kinetic mechanisms of three kinds of stone coal, and the classify attribute of stone coal is investigated. The results show that stone coal is with high ash, high sulfur and low heat value. The combustion characteristics of stone coal are similar to anthracite coal and worse than anthracite. The combustion kinetic mechanism of stone coal is investigated with Popescu method, and the conclusion indicates that the combustion of stone coal is controlled by the three-dimensional diffusion model and the anti Jander equation is the most probable kinetic function. The activation energies of the above three reaction stages are calculated by isoconversional method, and the values show that the energy barriers are always higher which confirms the combustion kinetic mechanism of stone coal. The classification system based on the volatile matter content in dry and ash free basis is not suitable to stone coal. From the coal rank and the combustion characteristics and kinetic analyzing results, the stone coal should be classed as a high rank and maggy anthracite coal. |
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Keywords:
stone coal
combustion diagnosis
combustion kinetics
classify attribute
thermogravimetry
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收稿日期 2006-05-08 修回日期 1900-01-01 网络版发布日期 |
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DOI: |
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基金项目:
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通讯作者: 刘建忠 |
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作者简介: |
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| 本刊中的类似文章 |
| 1．宁新宇 李诗媛 吕清刚 贠小银 矫维红.秸秆类生物质与石煤在流化床中的混烧与黏结机理[J]. 中国电机工程学报, 2008,28(29): 105-110 |
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| Copyright by 中国电机工程学报 |
