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

共 24 条

[11] MITCHELL SC, 1998, IEA COAL RES, P14
[12] PULVERIZED COAL COMBUSTION IN O-2 CO2 MIXTURES ON A POWER-PLANT FOR CO2 RECOVERY
NAKAYAMA, S
NOGUCHI, Y
KIGA, T
MIYAMAE, S
MAEDA, U
KAWAI, M
TANAKA, T
KOYATA, K
MAKINO, H
[J]. ENERGY CONVERSION AND MANAGEMENT, 1992, 33 (5-8) : 379 - 386
[13] Analysis of the flame formed during oxidation of pulverized coal by an O-2-CO2 mixture
Nozaki, T
Takano, S
Kiga, T
Omata, K
Kimura, N
[J]. ENERGY, 1997, 22 (2-3) : 199 - 205
[14] NOx reduction mechanism in coal combustion with recycled CO2
Okazaki, K
Ando, T
[J]. ENERGY, 1997, 22 (2-3) : 207 - 215
[15] RELATIVE CONTRIBUTIONS OF VOLATILE NITROGEN AND CHAR NITROGEN TO NOX EMISSIONS FROM PULVERIZED COAL FLAMES
PERSHING, DW
WENDT, JOL
[J]. INDUSTRIAL & ENGINEERING CHEMISTRY PROCESS DESIGN AND DEVELOPMENT, 1979, 18 (01): : 60 - 67
[16] Power plants with CO2 capture using integrated air separation and flue gas recycling
Shao, YL
Golomb, D
[J]. ENERGY CONVERSION AND MANAGEMENT, 1996, 37 (6-8) : 903 - 908
[17] SHIRAKAWA K, 1992, P C UT TECHN COAL, V2, P235
[18] REDUCTION OF NITRIC-OXIDE BY COAL CHAR AT TEMPERATURES OF 1250-K-1750-K
SONG, YH
BEER, JM
SAROFIM, AF
[J]. COMBUSTION SCIENCE AND TECHNOLOGY, 1981, 25 (5-6) : 237 - 240
[19] Basic effects on NOx emissions in air staging and reburning at a bench-scale test facility
Spliethoff, H
Greul, U
Rudiger, H
Hein, KRG
[J]. FUEL, 1996, 75 (05) : 560 - 564
[20] Effects of coal structures on denitrogenation during flash pyrolysis
Takagi, H
Isoda, T
Kusakabe, K
Morooka, S
[J]. ENERGY & FUELS, 1999, 13 (04) : 934 - 940

← 1 2 3 →