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首页> 外文期刊>Fuel >Emission characteristics of co-combustion of a low calorie and high sulfur-lignite coal and woodchips in a circulating fluidized bed combustor: Part 1. Effect of excess air ratio
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Emission characteristics of co-combustion of a low calorie and high sulfur-lignite coal and woodchips in a circulating fluidized bed combustor: Part 1. Effect of excess air ratio

机译：低卡路里高硫褐煤和木片在循环流化床燃烧器中共燃烧的排放特征：第1部分。过量空气比的影响

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摘要

In this study, co-combustion of Bursa-Orhaneli lignite and woodchips mixtures containing 10%, 30% and 50% by wt. of woodchips was studied in a circulating fluidized bed combustor in order to investigate the effect of excess air ratio (λ) on the flue gas emissions. The combustor has an inside diameter of 108 mm and a height of 6 m. The temperature of the combustor is kept at 850 ℃ during the combustion tests. During the combustion tests, CO, O_2, NO, and SO_2 emissions in the flue gas was continuously measured and recorded by ABB-AO 2000 flue gas analyzer. The results of the tests showed that increasing excess air had a cooling effect on the combustor, but at the same time it also provided smoother temperature profile along the combustor. In order to get minimum flue gas emissions, the optimum excess air ratios for the co-combustion tests of fuel mixture including 10%, 30% and 50% by wt. of woodchips were determined to be 1.18,1.32 and 1.41, respectively. While woodchips addition to the lignite made CO emissions worse, it did not change NO emission. CO and NO emissions were below the limits but SO_2 emission was above the limit for the case of 10% and 30% woodchips co-combustion at optimum excess air ratio. In the case of 50% woodchips co-combustion, SO_2 and NO emissions were under the limits but CO emission was a little above the limit at optimum excess air ratio.
机译：在这项研究中，Bursa-Orhaneli褐煤和木屑混合物的混合燃烧包含10％，30％和50％的重量。为了研究过量空气比（λ）对烟道气排放的影响，在循环流化床燃烧器中对木屑的数量进行了研究。燃烧器的内径为108毫米，高度为6 m。在燃烧测试中，燃烧室的温度保持在850℃。在燃烧测试期间，通过ABB-AO 2000烟气分析仪连续测量并记录烟气中的CO，O_2，NO和SO_2排放。测试结果表明，增加过量的空气会对燃烧室产生冷却效果，但与此同时，燃烧室的温度分布也更加平滑。为了获得最小的烟道气排放，混合燃料燃烧试验的最佳过量空气比包括10％，30％和50％（重量）。木片的数量分别确定为1.18、1.32和1.41。尽管褐煤中的木片使CO排放恶化，但并没有改变NO排放。在最佳过量空气比下，木屑共燃烧10％和30％的情况下，CO和NO排放量低于限值，但SO_2排放量高于限值。在木屑共燃烧率为50％的情况下，SO_2和NO排放量均在限值范围内，但在最佳过量空气比率下，CO排放量略高于限值。

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  • 来源
    《Fuel》 |2014年第ptaa期|792-800|共9页
  • 作者

    Murat Varol; Aysel T. Atimtay; Hayati Olgun; Huesnue Atakuel;

  • 作者单位

    Department of Environmental Engineering, Middle East Technical University, Ankara 06800, Turkey,Department of Environmental Engineering, Akdeniz University, Antalya 07058, Turkey;

    Department of Environmental Engineering, Middle East Technical University, Ankara 06800, Turkey;

    Solar Energy Institute, Ege University, Izmir 35100, Turkey;

    Department of Chemical Engineering, Istanbul Technical University, Istanbul 34469, Turkey;

  • 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

    Co-combustion; Circulating fluidized bed; Woodchips; Excess air ratio; Emissions;

    机译：共燃;循环流化床;木屑;过量空气比;排放物;

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