The reduction of recycled-NOx in coal combustion with O2/recycled flue gas under low recycling ratio

被引：89
|
作者：
Hu, YQ [1 ]
Kobayashi, N [1 ]
Hasatani, M [1 ]
机构：
[1] Nagoya Univ, Dept Energy Engn & Sci, Chikusa Ku, Nagoya, Aichi 4648603, Japan
来源：
FUEL | 2001年 / 80卷 / 13期
关键词：
combustion; flue gas; equivalence ratio;
D O I：
10.1016/S0016-2361(01)00048-5
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
The emission and reduction of NO, in coal combustion with O-2/recycled flue gas were investigated in an electric heated up-flow-tube combustor with a high volatile bituminous coal. The recycling ratio of flue gas ranged from 0 to 0.4, and the concentrations of recycled-NO in inlet gas were 0, 500 and 1000 ppm. Reduction efficiency of the recycled-NO, changed both with equivalence ratio and recycling ratio. More than 60% recycled-NO was reduced when equivalence ratio phi > 1.4. Less recycled-NO was reduced under lower recycling ratio than that under higher recycling ratio. HCN and NH3 were also detected with GC-FTD. The results indicated that HCN emissions decreased with the increase of recycled-NO concentration in inlet gas. No obvious influence of temperature on the reduction of recycled-NO was found. The experiments on recycled-NO2 demonstrated a consistent trend similar to the NO recycle tests. (C) 2001 Published by Elsevier Science Ltd.
引用
收藏
页码：1851 / 1855
页数：5
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