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吕太, 赵世泽. 燃尽风位置高度对NOx生成的影响[J]. 环境工程学报, 2016, 10(5): 2541-2546. doi: 10.12030/j.cjee.201412079
引用本文: 吕太, 赵世泽. 燃尽风位置高度对NOx生成的影响[J]. 环境工程学报, 2016, 10(5): 2541-2546. doi: 10.12030/j.cjee.201412079
shu
Lü Tai, Zhao Shize. Influence of over-fire air height on NOx emission characteristics[J]. Chinese Journal of Environmental Engineering, 2016, 10(5): 2541-2546. doi: 10.12030/j.cjee.201412079
Citation: Lü Tai, Zhao Shize. Influence of over-fire air height on NOx emission characteristics[J]. Chinese Journal of Environmental Engineering, 2016, 10(5): 2541-2546. doi: 10.12030/j.cjee.201412079
shu

燃尽风位置高度对NOx生成的影响

  • 1.

    东北电力大学能源与动力工程学院, 吉林 132012

  • 基金项目:

  • 中图分类号: X701

Influence of over-fire air height on NOx emission characteristics

  • 1.

    School of Energy and Power Engineering, Northeast Dianli University, Jilin 132012, China

  • Fund Project:

摘要

  • 摘要: 针对山东某电厂200 MW四角切圆燃烧锅炉NOx排放量过高的问题,采用多空气分级低氮燃烧技术对其进行改造,基于FLUENT软件平台,对改造前后炉内燃烧过程进行模拟计算,与工业性实验结果进行对比分析;并在额定工况下,对5种不同燃尽风位置高度的改造方案进行模拟计算,综合分析炉内燃烧及氮氧化物生成排放的情况,确定燃尽风位置的最佳高度。计算结果表明:改造后,炉内NOx排放量较改造前降幅40%左右,同时,合理地增加燃尽风位置高度,可进一步降低NOx的排放量,综合炉内各参数变化的比较得出:燃料从主燃区至燃尽区的最佳运行时间约为0.66 s。
    Abstract: To reduce the nitrogen oxide (NOx) emissions from a 200 MW tangential boiler in Shandong, China, using swirl burners, a retrofit scheme was proposed by adopting air multi-grade and low-NOx combustion technology. The software platform FLUENT was used to perform an analog computation of the combustion before and after the transformation, and to make a comparative analysis with industrial test results. In addition, considering rated conditions, analog computations of five versions of over-fire air (OFA) system positioning were performed, as well as a comprehensive analysis of combustion and emissions of NOx to determine the best location of the OFA height. The results indicated the following: after the transformation, NOx emissions from the furnace decreased about 40%, and reasonably increasing the height of the OFA position can further reduce NOx emissions. A comprehensive comparison of changes in the parameters of the furnace suggests that the best running time for fuel moving from the primary combustion zone to the burnout zone is approximately 0.66 s.
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出版历程
  • 收稿日期:  2015-01-04
  • 刊出日期:  2016-06-03
吕太, 赵世泽. 燃尽风位置高度对NOx生成的影响[J]. 环境工程学报, 2016, 10(5): 2541-2546. doi: 10.12030/j.cjee.201412079
引用本文: 吕太, 赵世泽. 燃尽风位置高度对NOx生成的影响[J]. 环境工程学报, 2016, 10(5): 2541-2546. doi: 10.12030/j.cjee.201412079
shu
Lü Tai, Zhao Shize. Influence of over-fire air height on NOx emission characteristics[J]. Chinese Journal of Environmental Engineering, 2016, 10(5): 2541-2546. doi: 10.12030/j.cjee.201412079
Citation: Lü Tai, Zhao Shize. Influence of over-fire air height on NOx emission characteristics[J]. Chinese Journal of Environmental Engineering, 2016, 10(5): 2541-2546. doi: 10.12030/j.cjee.201412079
shu

燃尽风位置高度对NOx生成的影响

  • 1. 东北电力大学能源与动力工程学院, 吉林 132012
  • 收稿日期:  2015-01-04
基金项目:

摘要: 针对山东某电厂200 MW四角切圆燃烧锅炉NOx排放量过高的问题,采用多空气分级低氮燃烧技术对其进行改造,基于FLUENT软件平台,对改造前后炉内燃烧过程进行模拟计算,与工业性实验结果进行对比分析;并在额定工况下,对5种不同燃尽风位置高度的改造方案进行模拟计算,综合分析炉内燃烧及氮氧化物生成排放的情况,确定燃尽风位置的最佳高度。计算结果表明:改造后,炉内NOx排放量较改造前降幅40%左右,同时,合理地增加燃尽风位置高度,可进一步降低NOx的排放量,综合炉内各参数变化的比较得出:燃料从主燃区至燃尽区的最佳运行时间约为0.66 s。

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