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Experimental study on preheating and combustion characteristics of pulverized anthracite coal

机译：无烟煤粉的预热燃烧特性试验研究

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摘要

Anthracite, with low volatile content, has difficulties in ignition, stabilization, and burn out, especially under conditions of low boiler load. A new technique for preheating pulverized anthracite by a circulating fluidized bed was adopted. Experiments on preheated anthracite combustion were carried out in a down-fired combustor. Process of anthracite preheating, combustion characteristics, and NO_x emissions were studied. The results show that preheated anthracite has a smaller mean size with a larger specific surface area. There is a uniform temperature profile along the axis of the down-fired combustor, and the combustion efficiency is 96.5%. The NO_x emission in the exhaust is 256 mg/N m~3 (@ 6% O_2) and the conversion ratio of fuel-N to NO_x is 24.3%.
机译：挥发物含量低的无烟煤难以点火，稳定和燃尽，特别是在锅炉负荷较低的情况下。采用了一种通过循环流化床对粉煤无烟煤进行预热的新技术。在向下燃烧的燃烧器中进行了预热无烟煤燃烧的实验。研究了无烟煤的预热过程，燃烧特性和NO_x排放。结果表明，预热的无烟煤具有较小的平均尺寸和较大的比表面积。沿着向下燃烧器的轴线有均匀的温度分布，燃烧效率为96.5％。废气中的NO_x排放为256 mg / N m〜3（@ 6％O_2），燃料-N向NO_x的转化率为24.3％。

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  • 来源
    《Fuel》 |2013年第11期|122-127|共6页
  • 作者

    Ziqu Ouyang; Jianguo Zhu; Qinggang Lu;

  • 作者单位

    Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China;

    Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China;

    Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, 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

    Pulverized anthracite; Preheating; Combustion characteristic; NO_x emission;

    机译：粉状无烟煤;预热;燃烧特性NO_x排放;

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