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DESIGN OPTIMIZATION FOR LOW-NO COAL-FIRING SYSTEMS

机译:低无燃煤系统的设计优化

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We report numerical results and measurements for a 575 MW pulverized coal tangential firing boiler of the Israel Electric Corporation (IEC). Measured and calculated values were found to be in reasonable agreement. We used simulations to optimize both the furnace flue gas temperature and the staged residence time for low-NO_x and tested mass flow rates through close-coupled and separate over-fire air ports and the coal powder fineness. These parameters control the mixing rate of fuel and oxidizer streams and affect temperature regimes, coal burning rate, and nitrogen oxidation/reduction. From this effort, IEC started to improve boiler performance by replacing existing burners to low-NO_x firing system to ensure the current regulation requirements of emission pollutions.
机译:我们报告了以色列电力公司(IEC)的575 MW煤粉切向燃烧锅炉的数值结果和测量结果。发现测量值和计算值在合理范围内。我们使用模拟来优化低NO_x的炉烟气温度和分段停留时间,并通过紧密耦合和独立的过火气口以及煤粉细度测试了质量流量。这些参数控制燃料和氧化剂流的混合速率,并影响温度范围,燃煤速率和氮氧化/还原。通过这一努力,IEC开始通过将现有的燃烧器替换为低NO_x燃烧系统来提高锅炉性能,以确保当前对排放污染的法规要求。

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