摘要
粉煤流化床 (PC- FB)是一项燃烧效率高 ,同时实现炉内脱硫 ,低 NOx 和 N2 O排放的新型高效、清洁煤燃烧技术。在一座 0 .3MW的试验台上 ,研究了其 N2 O生成与分布特性 ,包括床层温度 Tb、流化速度 U0 、二次风率 R2 ,PC- FB流化床燃烧区 (FBCZ)出口氧浓度 O 2 、钙硫比 (Ca/S)对 FBCZ出口 N2 O浓度的影响 ;以及各层二次风份额(R2 i% )及悬浮空间燃烧区 (FCZ)的温度分布与炉内 N2 O浓度分布的关系。
The pulverized coal-fluidized bed (PC-FB) is a new clean coal combustion technology.We can get a high combustion efficiency and realize in-furnace desulphuration,low NO_x and N_2O emission.In this paper,the research work was conducted systematically on the production and distribution of N_2O in a 0.3 MW PC-FB experimental rig.We investigated the influence of many factors on the N_2O concentration at FBCZ's exit,such as bed temperature (T_b),fluidizing velocity (U_0),secondary air ratio (R_2),O_2 concentration at FBCZ's exit (O _2) and Ca/S ratio.We also studied the relationship between the N_2O concentration distribution and every layer's secondary air ratio (R_ 2i %) and the temperature distribution in FCZ.
出处
《燃烧科学与技术》
CAS
CSCD
2000年第3期233-237,共5页
Journal of Combustion Science and Technology
基金
教育部高校博士点基金
关键词
煤粉
流化床
燃烧
生成特性
锅炉
氧化亚氮
pulverized coal
fluidized bed
combustion
N_2O production characteristics
