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煤矸石与半焦富氧混烧特性及污染物排放特性研究

戴若薇 赵瑞东 王志奇 秦建光 陈天举 吴晋沪

戴若薇, 赵瑞东, 王志奇, 秦建光, 陈天举, 吴晋沪. 煤矸石与半焦富氧混烧特性及污染物排放特性研究[J]. 燃料化学学报. doi: 10.1016/S1872-5813(21)60132-9
引用本文: 戴若薇, 赵瑞东, 王志奇, 秦建光, 陈天举, 吴晋沪. 煤矸石与半焦富氧混烧特性及污染物排放特性研究[J]. 燃料化学学报. doi: 10.1016/S1872-5813(21)60132-9
DAI Ruo-wei, ZHAO Rui-dong, WANG Zhi-qi, QIN Jian-guang, CHEN Tian-ju, WU Jin-hu. Study on the oxy-fuel co-combustion and pollutants emission characteristics of coal gangue and semicoke[J]. Journal of Fuel Chemistry and Technology. doi: 10.1016/S1872-5813(21)60132-9
Citation: DAI Ruo-wei, ZHAO Rui-dong, WANG Zhi-qi, QIN Jian-guang, CHEN Tian-ju, WU Jin-hu. Study on the oxy-fuel co-combustion and pollutants emission characteristics of coal gangue and semicoke[J]. Journal of Fuel Chemistry and Technology. doi: 10.1016/S1872-5813(21)60132-9

煤矸石与半焦富氧混烧特性及污染物排放特性研究

doi: 10.1016/S1872-5813(21)60132-9
基金项目: 国家重点研发计划(2017YFB0602003),国家自然科学基金(U1610254),中科院-内蒙古院区科技合作(2020CG0116)和中央引导地方科技发展资金资助
详细信息
    作者简介:

    戴若薇:dairw@qibebt.ac.cn

    通讯作者:

    Tel: 0532-80662763, Email: zhaord@qibebt.ac.cn

  • 中图分类号: TQ534

Study on the oxy-fuel co-combustion and pollutants emission characteristics of coal gangue and semicoke

Funds: This work was supported by the National Key R&D Program of China (2017YFB0602003), National Natural Science Foundation of China (U1610254), Science and Technology Cooperation Project of Chinese Academy of Sciences and Inner Mongolia (2020CG0116) and Central Guidance Fund for Local Science and Technology Development of China
More Information
  • 摘要: 利用热重分析仪和管式炉实验,研究了煤矸石与半焦的富氧混烧特性,考察了半焦混烧比例、O2浓度和反应温度对燃烧特性和污染物排放特性的影响。结果表明,混烧半焦和提高O2浓度均可显著改善混合燃料的燃烧性能,当半焦混烧比例为75%时,着火和燃尽指数最高。随半焦混烧比例增大,CO和SO2转化率均逐渐降低。提高反应温度,CO转化率降低,SO2转化率增大,NO转化率呈现先升高然后降低或缓慢增加趋势。反应温度为900 ℃时,混烧半焦可降低燃烧过程的NO排放量。但其余反应温度下,混烧半焦会增大NO转化率。随O2浓度升高,混合燃料富氧燃烧过程的CO转化率降低,NO转化率升高,SO2峰值释放浓度和转化率呈先降低后升高的趋势。当O2浓度为20%时,SO2转化率最低。
  • 图  1  管式炉实验装置示意图

    Figure  1  Schematic diagram of the tube furnace experimental device

    1: O2; 2: CO2; 3, 4, 5, 6: mass flow controller; 7, 8: gas mixer; 9: Inner quartz tube; 10: Outer quartz tube; 11: sample tube; 12: furnace; 13: exhaust system; 14: flue gas analyzer

    图  2  不同半焦混烧比例下TG(a)和DTG(b)曲线

    Figure  2  TG (a) and DTG (b) curves at different semicoke blending ratios

    图  3  不同O2浓度下TG(a)和DTG(b)曲线

    Figure  3  TG (a) and DTG (b) curves at different O2 concentrations

    图  4  CO转化率随半焦混烧比例和反应温度变化

    Figure  4  CO conversion curves at different temperatures and semicoke blending ratios

    图  5  NO转化率随半焦混烧比例和反应温度变化

    Figure  5  NO conversion curves at different temperatures and semicoke blending ratios

    图  6  SO2转化率随半焦混烧比例和反应温度变化

    Figure  6  SO2 conversion curves at different temperatures and semicoke blending ratios

    图  7  CO排放特性(a)和转化率(b)随O2浓度变化

    Figure  7  CO emission characteristic (a) and conversion (b) curves at different O2 concentrations

    图  8  NO排放特性(a)和转化率(b)随O2浓度变化

    Figure  8  NO emission characteristic (a) and conversion (b) curves at different O2 concentrations

    图  9  SO2排放特性(a)和转化率(b)随O2浓度变化

    Figure  9  SO2 emission characteristic (a) and conversion (b) curves at different O2 concentrations

    表  1  样品元素分析、工业和热值分析

    Table  1  Proximate, ultimate and heating value analysis of samples

    SamplesProximate analysis war/%Ultimate analysis war/%LHV
    MVAFC*CHNSO*MJ·kg−1
    Coal gangue1.5222.9052.2523.3340.672.220.611.501.2314.73
    Semicoke8.558.1110.0573.2973.811.320.880.395.0023.18
    note: M-moisture; V-volatile; A-ash; FC-fixed carbon; LHV-lower heating value, ar-received basis, *-by difference
    下载: 导出CSV

    表  2  不同半焦混烧比例下混合燃料的燃烧特征参数

    Table  2  Combustion characteristic parameters at different semicoke blending ratios

    Semicoke
    blending
    ratios/%
    ti
    /℃
    tm
    /℃
    tf
    /℃
    Di × 10−3
    /min−3
    Df × 10−4
    /min−3
    S × 10−8
    /(min−2·℃−3)
    04334936681.971.574.07
    254334936572.041.775.23
    504695158583.522.365.63
    754695158583.872.597.45
    1004745348583.441.878.23
    下载: 导出CSV

    表  3  不同O2浓度下混合燃料的燃烧特征参数

    Table  3  Combustion characteristic parameters at different O2 concentrations

    O2 concentration/%ti/℃tm/℃tf/℃Di × 10−3/min−3Df × 10−4/min−3S × 10−8/(min−2·℃−3)
    104786137021.260.465.21
    204685636921.981.067.71
    304695158583.522.365.63
    404645246674.146.3014.93
    下载: 导出CSV
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  • 收稿日期:  2021-05-07
  • 修回日期:  2021-07-01
  • 网络出版日期:  2021-07-16

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