煤再燃过程中燃料特性对NO还原的影响

在小型流动反应器中研究了不同煤粉及其煤焦对富燃料再燃区NO异相还原的影响。实验中选用的再燃燃料为小龙潭褐煤、富拉尔基褐煤和大同烟煤及其煤焦，以及添加不同催化剂的大同烟煤焦。实验在初始NO浓度为1000×10

Influence of FuelCharacters on NO Reduction in the Process of Coal Reburning

he effect of different pulverized coals and chars on NO hetero geneous reduction in the fuel rich stage of reburning was studied in a bench sca le flow reactor.In the experiments were used three pulverized coals and its chars and bituminous char with appended catalysts as reburning fuel.Experiments were c omplete at an initial concentration of 1 000×10－6 and reactor tempera ture of 900 and 1 100 ℃.It was found that tignite and its char have their NO re d uction efficiency higher than those of other coals and chars.The content of vola tile in coals,surface area of the chars and the content of metal catalyst in ash are all important factors affecting the NO reduction efficiency.In the reburnin g zone using pulverized coals and chars,the heterogeneous mechanism may be an im portant contributor to NO reduction.