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分级燃烧对NOx生成及燃烧经济性的影响
& I2 {7 B3 j* p0 [9 [8 N: J( pImpact of Staged Combustion on Formation of NOxand Combustion Economics6 Z9 \$ a/ ]3 F* r& @5 {
电力工业部热工研究院 文 军 许传凯 (西安710032)& @; ~. ]0 i, o% P% d Y
【摘要】 根据一维煤粉炉上的燃烧试验结果,研究4 T& u. @' P" ^
了空气分级燃烧对我国电站锅炉四种典型用煤的 P. {) f1 f' L) C$ G: s
NOx生成特性及煤粉燃尽率的影响。分析结果表
! B7 U1 S6 s( d. [& D( l; N4 I明,空气分级燃烧可以有效地降低炉内NOx的生成- g- U# W0 H0 S2 L' J
与排放。在综合考虑NOx排放与燃烧经济性的平衡
P7 W2 d- i$ j1 I, b. ?; I L后,可以得到试验煤种的最佳参数范围,在此范围内
K2 i5 {% \8 R0 j4 x可以实现低NOx高经济性的燃烧过程。+ R( F: g; z! d% O: \9 H
【关键词】 煤粉燃烧 空气分级 氮氧化物 燃尽9 S$ i$ C, A# s% Q, d+ Y
率
/ T8 r0 h/ c* z' K$ x5 r, gAbstract Based upon the results of combustion test-
% y' u. d1 s [( K5 j, ving on one-dimensional pulverized coal fired boilers,
; K4 N% X! O3 s" W8 Ithe impacts of air-staged combustion on the formation
& b" F1 Q2 u' Q8 Ocharacteristics of NOxand burn-up rate of pulverized
) e5 \" J5 @) P1 icoal for four typical kinds of coal fired in utility boilers& j1 C. j2 G- Y8 y1 r: z
in China were studied. The result analysis indicated
) d9 u' u1 g7 k. r; fthat air-staged combustion could effectively reduce the8 G8 {: P2 N6 j H8 v
formation of NOxin furnace and its emission. Through
7 ?0 f& \" x2 a7 Q" Mthe overall balance of NOxemission and combustion
- p9 E! Q6 U% {& Yeconomics, the optimum parameter range of the tested
- K* {! T! s! z9 o# y0 M9 jcoals can be obtained, and the efficient combustion
1 U* q: f0 W* G" P( Z, b) iprocess with low NOxemission within this range can% z3 f* V0 _' O
be realized.( {* F+ b, \0 B% P, d1 }* X" M
Key Words combustion of pulverized coal airstaged
9 \( y* ^+ M, M+ `0 e0 w nitrogen oxide burn-up rate |
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发表于 2009-9-17 16:48:34
