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煤燃烧过程中铍的迁移转化特性研究

黄津明 张军营 田冲 张世博 赵永椿 郑楚光

黄津明, 张军营, 田冲, 张世博, 赵永椿, 郑楚光. 煤燃烧过程中铍的迁移转化特性研究[J]. 燃料化学学报, 2016, 44(6): 648-653.
引用本文: 黄津明, 张军营, 田冲, 张世博, 赵永椿, 郑楚光. 煤燃烧过程中铍的迁移转化特性研究[J]. 燃料化学学报, 2016, 44(6): 648-653.
HUANG Jin-ming, ZHANG Jun-ying, TIAN Chong, ZHANG Shi-bo, ZHAO Yong-chun, ZHENG Chu-guang. Investigation on the transfer-transformation behavior of beryllium during coal combustion[J]. Journal of Fuel Chemistry and Technology, 2016, 44(6): 648-653.
Citation: HUANG Jin-ming, ZHANG Jun-ying, TIAN Chong, ZHANG Shi-bo, ZHAO Yong-chun, ZHENG Chu-guang. Investigation on the transfer-transformation behavior of beryllium during coal combustion[J]. Journal of Fuel Chemistry and Technology, 2016, 44(6): 648-653.

煤燃烧过程中铍的迁移转化特性研究

基金项目: 

国家自然科学基金 51376074

和国家重点基础研究发展规划 973计划, 2014CB238904

详细信息
  • 中图分类号: X784

Investigation on the transfer-transformation behavior of beryllium during coal combustion

More Information
  • 摘要: 通过热力学平衡模拟计算煤燃烧过程中铍的形态转化, 采用高温真空管式炉进行含铍化合物与矿物的固固反应实验, 以及富铍煤中加入添加剂的燃烧实验, 通过X射线衍射仪 (XRD)、X射线荧光探针 (XRF) 以及电感耦合等离子质谱仪 (ICP-MS) 揭示煤燃烧过程中铍的迁移转化规律。结果表明, 模拟计算发现铍只与含铝化合物反应生成BeAl2O4和BeAl6O10, 同时固固反应实验也印证了这一结论, 但反应温度在1000℃左右, 明显高于模拟计算温度650℃。添加Al2O3的富铍煤在燃烧时, 由于铍与Al2O3发生反应, 铍的释放率明显降低, 最高降低33%以上; 添加了伊利石的富铍煤, 由于伊利石与铍的反应温度高于Al2O3, 其抑制作用弱于Al2O3; 而高岭石由于与铍的反应温度过高, 在高岭石与铍发生反应产生抑制效果之前, 部分铍已经在燃烧过程中释放出去, 因此, 抑制效果最差。
  • 图  1  燃煤过程中铍的迁移转化规律模拟计算结果

    Figure  1  Thermodynamic calculation results of beryllium migration and transformation in the combustion process of coal

    图  2  1000℃时BeO与Al2O3反应产物的XRD谱图

    Figure  2  XRD patterns of reaction products between BeO and Al2O3 at 1000℃

    图  3  1200℃时BeO与高岭石反应产物的XRD谱图

    Figure  3  XRD patterns of reaction products between BeO and kaolinite at 1200℃

    图  4  1400℃时BeO与高岭石反应产物的XRD谱图

    Figure  4  XRD patterns of reaction products between BeO and kaolinite at 1400℃

    图  5  1200℃时BeO与伊利石反应产物的XRD谱图

    Figure  5  XRD patterns of reaction products between BeO and illite at 1200℃

    图  6  乙酰丙酮铍与Al2O3混合燃烧产物的XRD谱图

    Figure  6  XRD patterns of reaction products between acetyl acetone beryllium and Al2O3

    图  7  燃烧过程中铍的释放曲线

    ■: coal; ●: coal with 2% alumina; ▲: coal with 2% kaolinite; ◆: coal with 2% illite

    Figure  7  Release curve of Be in the combustion process

    表  1  煤的工业分析和元素分析

    Table  1  Proximate and ultimate analysis of coal

    Coal sampleProximate analysis w/%Ultimate analysis wd/%
    Mad Ad VdFCdCHONS
    Wulantuga coal15.1412.2841.2646.4658.764.6521.740.911.66
    下载: 导出CSV

    表  2  灰成分分析

    Table  2  Coal ashes analysis

    Major ash components w/%
    TiO2SO3Al2O3SiO2K2OCaOFe2O3
    0.566.6312.8942.640.524.0831.52
    下载: 导出CSV

    表  3  燃煤过程中铍的释放率

    Table  3  Beryllium release in the combustion process of coal

    Coal sampleCoal w/%Coal with 2% alumina w/%Coal with 2% Kaolinite w/%Coal with 2% illite coal w/%
    800℃11.568.2712.5911.15
    1000℃15.7513.5614.9913.66
    1200℃29.3516.4725.6023.11
    1400℃55.9222.2737.1026.62
    下载: 导出CSV

    表  4  灰熔点参数

    Table  4  Ash fusion point

    Coal sampleCoal t/℃Coal with 2%
    alumina t/℃
    DT9861330
    ST10961422
    FT11221490
    下载: 导出CSV
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出版历程
  • 收稿日期:  2015-12-31
  • 修回日期:  2016-03-15
  • 网络出版日期:  2021-01-23
  • 刊出日期:  2016-06-10

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