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分级燃烧对NOx生成及燃烧经济性的影响+ c) ~* T) X+ @5 L
Impact of Staged Combustion on Formation of NOxand Combustion Economics, W% Y% D9 \: N+ Y: z/ V: K
电力工业部热工研究院 文 军 许传凯 (西安710032)
' m" |' ]- X( V X【摘要】 根据一维煤粉炉上的燃烧试验结果,研究! i! V7 M) k6 Q* V
了空气分级燃烧对我国电站锅炉四种典型用煤的
; k- i" n( e* m5 W7 p* HNOx生成特性及煤粉燃尽率的影响。分析结果表6 x/ @ |: }' ~; y( C( @0 f `
明,空气分级燃烧可以有效地降低炉内NOx的生成9 w$ x G& h3 p$ z% f
与排放。在综合考虑NOx排放与燃烧经济性的平衡2 l! J+ V. |5 P- P
后,可以得到试验煤种的最佳参数范围,在此范围内
% z* K% x6 x. ?, v9 z4 L+ h) i6 z可以实现低NOx高经济性的燃烧过程。
' i+ `9 d- H& t& }/ }【关键词】 煤粉燃烧 空气分级 氮氧化物 燃尽
- N \" W2 m0 L( u3 }2 k) u. b率" K9 t+ D; Y% T2 i/ V1 X5 S9 f) Y
Abstract Based upon the results of combustion test-
# ]) @( K* ^" p* w$ B$ c, O- B8 E2 sing on one-dimensional pulverized coal fired boilers,0 @: y( E6 N4 V5 X2 x. e5 u* t
the impacts of air-staged combustion on the formation
; @ [- t0 [! D) t! |characteristics of NOxand burn-up rate of pulverized
$ E& b7 Y' H0 A" I% Hcoal for four typical kinds of coal fired in utility boilers
9 t$ L" L* A1 Pin China were studied. The result analysis indicated6 M9 V# G% R9 O, ?! F) O m9 G; l
that air-staged combustion could effectively reduce the
3 v8 N# s9 @+ P0 O6 wformation of NOxin furnace and its emission. Through
# l0 L5 O1 C8 g2 `: I' gthe overall balance of NOxemission and combustion) m1 A7 k5 d$ ]% w8 x/ j
economics, the optimum parameter range of the tested1 p' `1 _' w; ~! s$ h' D
coals can be obtained, and the efficient combustion
5 i* ~6 k( Z7 S1 }8 M1 x1 f" tprocess with low NOxemission within this range can
: L: a2 z3 x. G" P- Mbe realized.
- Z9 b5 b% Y& z: l X- sKey Words combustion of pulverized coal airstaged. d1 L+ V1 L8 S/ p6 U% X0 L
nitrogen oxide burn-up rate |
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发表于 2009-9-17 16:48:34
