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空气分段低NOx燃烧技术目前已逐渐用于现役燃煤电站锅炉的改造和锅炉设计中,通过CFD软件平台,使用数值计算的方法对空气分段燃烧技术进行研究。研究了影响燃煤电站锅炉NOx排放的因素,讨论了影响空气分段燃烧生成NOx的因素。计算结果表明,分段风喷口高度是影响最终NOx排放浓度的重要因素之一。在一定有效范围内,NOx排放浓度随着分段风喷口高度的变化并不大;分段风抽风量也是影响NOx生成的重要因素,NOx排放浓度随着分段风抽风量增大而降低。另外还需综合考虑实际锅炉的运行情况、经济效益和环境效益等各方面因素,进行合理的优化选择最佳运行参数。
Air segmented low NOx combustion technology has been gradually used in the transformation of existing coal-fired power plant boilers and boiler design, through the CFD software platform, the use of numerical methods to study the air segmented combustion technology. The factors that affect the NOx emissions of coal-fired power plant boilers are studied. The factors that affect the production of NOx by air-staged combustion are discussed. The calculation results show that the height of the segmented air vents is one of the important factors that affect the final NOx emission concentration. Within a certain effective range, the concentration of NOx emission does not vary greatly with the height of the sectioned air vents. The amount of air exhausted by the section air is also an important factor that affects the NOx formation. The NOx emission concentration decreases with the increase of the section air suction air volume. Also need to consider the actual boiler operation, economic and environmental benefits and other factors, to optimize the optimal selection of the best operating parameters.