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分级燃烧对NOx生成及燃烧经济性的影响
2 x' z% O5 o M: ]1 n# s* GImpact of Staged Combustion on Formation of NOxand Combustion Economics
' w q; ?: ^) R电力工业部热工研究院 文 军 许传凯 (西安710032)( ^3 L" X% |3 i( n6 s
【摘要】 根据一维煤粉炉上的燃烧试验结果,研究
" N- c; b% h+ h6 E& j1 u2 f了空气分级燃烧对我国电站锅炉四种典型用煤的
$ x: k* A: J5 U8 d$ |2 M3 wNOx生成特性及煤粉燃尽率的影响。分析结果表
( M* N/ z; X, |3 J7 o b明,空气分级燃烧可以有效地降低炉内NOx的生成4 _4 @% n. |4 R8 r
与排放。在综合考虑NOx排放与燃烧经济性的平衡. q1 F8 @# }/ e. z5 N2 r
后,可以得到试验煤种的最佳参数范围,在此范围内
5 a6 u! G7 m+ W4 n可以实现低NOx高经济性的燃烧过程。, g6 i: ?% K9 Z- R, Q" O
【关键词】 煤粉燃烧 空气分级 氮氧化物 燃尽! g+ \* E2 T$ t* u( @& e
率" M* S( T4 Q. F9 b/ P8 W
Abstract Based upon the results of combustion test-
! |7 h. p( u2 N {9 V) u9 g% a: J( eing on one-dimensional pulverized coal fired boilers,& h5 D3 q# D, [- l# Q
the impacts of air-staged combustion on the formation
Z; x8 X& w! b1 u) F n2 K5 D3 Hcharacteristics of NOxand burn-up rate of pulverized$ N0 ?* o7 ~( v8 N3 B
coal for four typical kinds of coal fired in utility boilers) _/ d- I$ V( n& A
in China were studied. The result analysis indicated) X6 @: t$ h9 J' D( y
that air-staged combustion could effectively reduce the
6 r g7 _/ n4 E5 L# |# _formation of NOxin furnace and its emission. Through
) l/ v( w3 b! o( uthe overall balance of NOxemission and combustion( k' O. q4 D+ `& R6 S4 y
economics, the optimum parameter range of the tested/ x! R7 R. h7 u
coals can be obtained, and the efficient combustion
: Q! ?& k% _) k T$ T; nprocess with low NOxemission within this range can4 Z+ T- ^# I! C( e" H$ m, ?
be realized. o' L# i% h8 T3 f5 N
Key Words combustion of pulverized coal airstaged
7 {& F$ B) N* h) A nitrogen oxide burn-up rate |
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发表于 2009-9-17 16:48:34
