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首页> 外文期刊>Applied Energy >Effect of the anthracite ratio of blended coals on the combustion and NO_x emission characteristics of a retrofitted down-fired 660-MW_e utility boiler
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Effect of the anthracite ratio of blended coals on the combustion and NO_x emission characteristics of a retrofitted down-fired 660-MW_e utility boiler

机译：混煤无烟煤比例对改型下燃660-MW_e电站锅炉燃烧和NO_x排放特性的影响

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摘要

Industrial experiments were performed for a retrofitted 660-MW_e full-scale arch-fired boiler. The ignition position of the primary air/fuel mixture flow, furnace temperature and flue gas component after the air heater were measured with different anthracite ratios at loads of 660- and 380-MW_e. As the ratio of anthracite increased, the gas temperature decreased in the fuel-burning zones of the C4 and C6 burners, indicating a farther ignition position of the primary fuel/air flow under the arches, the gas temperature of the lower furnace decreased while that of the upper furnace increased, NO_x emissions decreased while both the exhaust gas temperature and carbon content in fly ash increased, and the boiler efficiency decreased. At the rated load, an anthracite ratio of 35% was optimal for economical efficiency. At low load, the negative gas pressure fluctuated remarkably, which led to unstable combustion in the furnace. To ensure safe and stable operation of the boiler, a mass ratio of anthracite of 25% is advisable.
机译：对改装后的660 MW_e大型拱型锅炉进行了工业实验。在660-和380-MW_e的负载下，用不同的无烟煤比测量了空气/燃料混合物的一次流动的点火位置，炉膛温度和空气加热器后的烟气成分。随着无烟煤比例的增加，C4和C6燃烧器的燃料燃烧区中的气体温度降低，这表明主要燃料/空气流在弧形下的点火位置更远，下部炉膛的气体温度下降，而上部炉膛的排放增加，NO_x排放减少，而烟气中的废气温度和碳含量均增加，锅炉效率下降。在额定负载下，无烟煤比例为35％时，经济效益最佳。在低负荷下，负气压显着波动，导致炉内燃烧不稳定。为确保锅炉安全稳定运行，建议无烟煤的质量比为25％。

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  • 来源
    《Applied Energy》 |2012年第2012期|p.196-201|共6页
  • 作者

    Guangkui Liu; Zhengqi Li; Zhichao Chen; Xingying Zhu; Qunyi Zhu;

  • 作者单位

    School of Energy Science and Engineering, Harbin Institute of Technology, 92, West Dazhi Street, Harbin 150001, PR China;

    School of Energy Science and Engineering, Harbin Institute of Technology, 92, West Dazhi Street, Harbin 150001, PR China;

    School of Energy Science and Engineering, Harbin Institute of Technology, 92, West Dazhi Street, Harbin 150001, PR China;

    School of Energy Science and Engineering, Harbin Institute of Technology, 92, West Dazhi Street, Harbin 150001, PR China;

    School of Energy Science and Engineering, Harbin Institute of Technology, 92, West Dazhi Street, Harbin 150001, PR China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    arch-fired boiler; retrofit; blended coals; NO_x emissions; boiler efficiency;

    机译：拱火锅炉改造混合煤;NO_x排放;锅炉效率;

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