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首页> 外文期刊>Thermal engineering >On High Suppression of NOX and CO Emissions in Gas-Turbine Plants with Combined Gas-and- Steam Cycles
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On High Suppression of NOX and CO Emissions in Gas-Turbine Plants with Combined Gas-and- Steam Cycles

机译：燃气和蒸汽联合循环的燃气轮机装置中高氮氧化物和一氧化碳排放的抑制

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摘要

In this work are given results of analyzing processes of production of nitrogen oxides (NO_x) and afterburning of CO when firing natural gas at combined-cycle gas-turbine plants. It is shown that for suppressing emissions of the said microcomponents it is necessary to lower temperature in hot local zones of the flame in which NO_x is formed, and, in so doing, to avoid chilling of cold flame zones that prevents afterburning of CO. The required lowering of the combustion temperature can be provided by combustion of mixtures of methane with steam, with high mixing uniformity that ensures the same and optimum fraction of the steam "ballast" in each microvolume of the flame. In addition to chilling, the steam ballast makes it possible to maintain a fairly high concentration of hydroxil radicals in the flame zone as well, and this provides high burning out of fuel and reduction in carbon monoxide emissions (active steam ballast). Due to this fact the fraction of steam when firing its mixtures with methane in a gas-turbine plant can be increased up to the weight ratio 4 : 1. In this case, the concentrations of NO_x. and CO in emissions can be reduced to ultra-low values (less than 3 ppm).
机译：在这项工作中，给出了分析联合循环燃气轮机厂燃烧天然气时氮氧化物（NO_x）的产生过程和CO后燃过程的结果。已经表明，为了抑制所述微组分的排放，有必要降低形成NO_x的火焰的热局部区域的温度，并且这样做是为了避免冷火焰区域的变冷而阻止CO的再燃。甲烷与蒸汽的混合物燃烧可提供所需的降低燃烧温度的方法，并具有很高的混合均匀性，可确保在每个微小体积的火焰中，蒸汽“压载”的比例相同且最佳。除冷却外，蒸汽镇流器还可以在火焰区域保持较高浓度的羟自由基，这可以使燃料高度燃烧并减少一氧化碳的排放（活性蒸汽镇流器）。由于这个事实，在燃气轮机厂中将其与甲烷的混合物进行燃烧时，蒸汽的比例可以增加到重量比4：1。在这种情况下，NO_x的浓度会增加。并且可以将排放中的CO降低到超低值（小于3 ppm）。

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