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分级燃烧对NOx生成及燃烧经济性的影响
7 k# [$ }$ R* w7 UImpact of Staged Combustion on Formation of NOxand Combustion Economics9 e- k; v+ [+ {# [- K
电力工业部热工研究院 文 军 许传凯 (西安710032). P2 B/ X) D+ K) S, k
【摘要】 根据一维煤粉炉上的燃烧试验结果,研究) c5 s) N1 Y+ J4 q1 ]4 {
了空气分级燃烧对我国电站锅炉四种典型用煤的7 E, e5 ]3 @3 f- Z( C y) S
NOx生成特性及煤粉燃尽率的影响。分析结果表6 p" G& u# A X/ m% v
明,空气分级燃烧可以有效地降低炉内NOx的生成
5 Y9 ]# _$ _: U1 h( t与排放。在综合考虑NOx排放与燃烧经济性的平衡* w7 G- g+ G5 J+ _$ M
后,可以得到试验煤种的最佳参数范围,在此范围内
5 j" x, v2 O3 i( Y! G可以实现低NOx高经济性的燃烧过程。8 l5 v1 {' r' T& z5 V
【关键词】 煤粉燃烧 空气分级 氮氧化物 燃尽" t9 y/ G; J+ x
率, z/ G# x; G s% @& Y t( b. N% @
Abstract Based upon the results of combustion test-
$ [7 Q3 b1 o4 \* n9 g8 U4 ring on one-dimensional pulverized coal fired boilers,
* L( h6 X; c0 J2 Cthe impacts of air-staged combustion on the formation
! v! n' H) S, B" c; Mcharacteristics of NOxand burn-up rate of pulverized
, }3 l$ S2 a9 J2 B( Zcoal for four typical kinds of coal fired in utility boilers: m, o& K5 [/ {; E5 v
in China were studied. The result analysis indicated
* P# W7 o. F# H' B0 }that air-staged combustion could effectively reduce the
$ R0 V- ]9 B# A+ Zformation of NOxin furnace and its emission. Through" }1 A" S2 M/ a, M- x7 U3 |
the overall balance of NOxemission and combustion
. S2 o. @/ w s8 M% M" Reconomics, the optimum parameter range of the tested
+ ^3 Q: q) o* x% w9 hcoals can be obtained, and the efficient combustion
( p9 P, Z* r' z) s6 Oprocess with low NOxemission within this range can
3 K1 q1 D3 _3 i9 D+ Tbe realized.! v% k" A' ]+ t( w5 a
Key Words combustion of pulverized coal airstaged6 u1 }) W0 q. ~; E; B
nitrogen oxide burn-up rate |
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发表于 2009-9-17 16:48:34
