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High-temperature reduction of nitrogen oxides in oxy-fuel combustion

机译：氧燃料燃烧中氮氧化物的高温还原

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摘要

The possibility of high-temperature reduction of nitrogen oxides (NO_X) in oxy-fuel combustion is investigated. A detailed gas-phase model identifies the effect of temperature, stoichiometric ratio, residence time and composition of the oxidizer on NO_x reduction. It is concluded that an efficient high-temperature reduction of NO_x is achieved with high-purity oxygen, negligible amount of air ingress, presence of a sub-stoichiometric combustion zone, and relatively long residence time. The temperature should be high but decreasing along with the NO_x concentration throughout the reaction zone. The influence of these parameters is discussed, also with regard to combustion efficiency, corrosion and ash handling.
机译：研究了在氧燃料燃烧中高温还原氮氧化物（NO_X）的可能性。详细的气相模型确定了温度，化学计量比，停留时间和氧化剂组成对NO_x还原的影响。结论是，通过高纯度氧气，可忽略不计的进气量，亚化学计量燃烧区的存在以及相对较长的停留时间，可以实现NO_x的高效高温还原。温度应较高，但应随整个反应区的NO_x浓度降低。还讨论了这些参数的影响，以及燃烧效率，腐蚀和灰烬处理方面的影响。

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