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Study On No Heterogeneous Reduction With Coal In An Entrained Flow Reactor

机译：气流床中煤的非均相还原研究

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The effects of coal types with a wide range of volatile matter content including lignite, bituminous coal, and lean coal, as well as the effects of reaction temperature, coal particle size, the primary-zone stoichi-ometry (SRI) and reburning-zone stoichiometry (SR2), etc. on NO reduction efficiency were carried out systematically in an entrained flow reactor. The heterogeneous NO reduction mechanism was analyzed. The results indicate that the NO reduction efficiencies increase with decreasing SR2 and coal particle size, and with increasing reaction temperature. The char contributions to the total NO reduction efficiency increase with increasing proximate volatile matter, coal particle size, and with decreasing reaction temperature. The char contribution can be reached more than 40% when SR2 is larger than 1.06 or less than 0.92 for XLT lignite. The char contribution at the conditions of SRI =1.0 and SRI = 1.2 is significantly larger than that at SRI = 1.1 for coals with high-volatile matter at a fixed reburning fraction.
机译：挥发物含量范围很广的煤种的影响，包括褐煤，烟煤和贫煤，以及反应温度，煤粒度，一次区化学计量（SRI）和再燃区的影响在夹带流反应器中系统地进行了关于NO还原效率的化学计量（SR2）等。分析了异质NO还原的机理。结果表明，随着SR2和煤粒径的减小以及反应温度的升高，NO的还原效率增加。炭对总NO还原效率的贡献随着附近挥发性物质，煤颗粒尺寸的增加以及反应温度的降低而增加。当XLT褐煤的SR2大于1.06或小于0.92时，炭含量可达到40％以上。对于SRI = 1.0和SRI = 1.2的情况，焦炭的贡献显着大于在固定再燃比下具有高挥发性物质的煤在SRI = 1.1时的贡献。

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