在一台循环流化床实验台上，研究了石灰石脱硫过程中Ｎ_２Ｏ／ＳＯ_ｘ／ＮＯ_ｘ浓度的变化，并在空床上进行了再燃烧法脱除Ｎ２Ｏ的实验，结果表明，石灰石脱硫会使ＮＯｘ少量增加，再燃烧法可以在不增加ＮＯｘ的同时使Ｎ_２Ｏ大大降低；再燃燃料的挥发分含量越高，Ｎ２Ｏ的消减率越高；气体停留时间越长，Ｎ２Ｏ的分解率越高；低氧量对再燃烧法消减Ｎ２Ｏ有利 In a circulating fluidized bed experiment bench, the change of N 2 O / SO x / NO x concentration in limestone desulfurization process was studied. The experiment of removing N 2 O by reburning in an empty bed was carried out. The results showed that limestone desulfurization would make a small amount of NO x The increase and reburn method can greatly reduce the N 2 O without increasing the amount of NO x. The higher the volatile content of the reburning fuel, the higher the N 2 O reduction rate. The longer the residence time of the gas, the higher the decomposition rate of N 2 O. Reburning method to reduce N2O favorable