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

被引：88

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

页码：1851 / 1855

页数：5

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