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分级燃烧对NOx生成及燃烧经济性的影响
, d; s( u0 w! e; C9 Q% e1 H/ hImpact of Staged Combustion on Formation of NOxand Combustion Economics
; h' _' T5 A/ I" E电力工业部热工研究院 文 军 许传凯 (西安710032)
0 k/ A c9 A0 ?# e" w【摘要】 根据一维煤粉炉上的燃烧试验结果,研究
% U+ [0 B& I% Z: a9 f了空气分级燃烧对我国电站锅炉四种典型用煤的& ^( Y* t1 T6 J/ c& d5 }, F' [) g
NOx生成特性及煤粉燃尽率的影响。分析结果表' h6 A4 o: z9 a1 T
明,空气分级燃烧可以有效地降低炉内NOx的生成
7 U" M5 m4 ]* }/ o$ R与排放。在综合考虑NOx排放与燃烧经济性的平衡' F+ R* O* {. A4 w8 r7 y' G
后,可以得到试验煤种的最佳参数范围,在此范围内& M" U$ c+ K9 o* ~' \, ^
可以实现低NOx高经济性的燃烧过程。* c8 F# I0 h9 k3 [
【关键词】 煤粉燃烧 空气分级 氮氧化物 燃尽
7 H! `- H& {+ D: `$ A$ v& \7 |# ]; |率* o4 h9 a* n0 o9 f
Abstract Based upon the results of combustion test-( q3 R1 V, _ O! [$ F/ ~$ v* v
ing on one-dimensional pulverized coal fired boilers,* s; x' Z& S1 m* C( _
the impacts of air-staged combustion on the formation
- }2 X, t- G2 U, o7 x4 Acharacteristics of NOxand burn-up rate of pulverized. @8 m2 ~; ~9 L/ I- j8 c
coal for four typical kinds of coal fired in utility boilers
0 r- A! R/ @8 h) tin China were studied. The result analysis indicated
! X6 m5 [/ i+ j( `3 k" O. Pthat air-staged combustion could effectively reduce the
+ U$ L9 A$ x1 |! q# \formation of NOxin furnace and its emission. Through5 c0 x1 W0 l! R) @* e
the overall balance of NOxemission and combustion
+ R# I( {" r6 b/ i% ~2 ^* R" L) Q! C% ]economics, the optimum parameter range of the tested
r& q& I. {- a! h% q4 z5 Ocoals can be obtained, and the efficient combustion
/ v7 E% `0 N2 z; e. hprocess with low NOxemission within this range can0 j- j s. v- k
be realized.0 r, g( }8 ^7 O+ L( H
Key Words combustion of pulverized coal airstaged
/ F' v; I$ R9 w2 p \' X nitrogen oxide burn-up rate |
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发表于 2009-9-17 16:48:34
