硫酸铵添加剂对生物质富氧混烧过程中氯与氮协同转化特性的影响

Influences of ammonium sulfate additive on Cl and N co-transformation during biomass/semi-coke oxy-fuel co-combustion

在50 kW循环流化床燃烧实验台进行了O 2/CO 2气氛下硫酸铵添加剂对生物质和半焦混烧过程中K/S/Cl迁移和N 2O/NO排放影响实验研究。结果表明,硫酸铵添加剂从提升管喷入后能够明显降低积灰中Cl含量,同时显著降低烟气中NO浓度。此外,硫酸铵添加剂还能够增强碱金属K向底渣和循环灰迁移转化,从而降低积灰中碱金属K含量。实验表明,硫酸铵添加剂的最佳喷入位置在提升管中上部。

To investigate the influences of ammonium sulfate(AS)on the K/S/Cl transformation and N 2O/NO emission,the biomass and semi-coke were co-combusted in a 50 kW circulating fluidized bed under O 2/CO 2 atmosphere.The experimental results show that AS can reduce the Cl content in deposits obviously and decrease the NO concentration in flue gas significantly.Besides,AS can retain more K in bottom ash and circulating ash,thereby reducing the K content in deposits.In terms of reducing Cl in deposits,the top half of the riser is the optimal position to inject AS.