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分级燃烧对NOx生成及燃烧经济性的影响! G6 X* _ K! U5 q
Impact of Staged Combustion on Formation of NOxand Combustion Economics0 X5 E3 C( L: s% v0 i) J
电力工业部热工研究院 文 军 许传凯 (西安710032)
" I0 H, I9 y, E5 b【摘要】 根据一维煤粉炉上的燃烧试验结果,研究
/ y5 u, x j. o0 d2 y了空气分级燃烧对我国电站锅炉四种典型用煤的, l1 @, I; @% U$ F! ?
NOx生成特性及煤粉燃尽率的影响。分析结果表
, }' _" S5 j0 I( h& `5 M( l明,空气分级燃烧可以有效地降低炉内NOx的生成/ I2 {; ?, G0 U8 }# n/ j! W+ w& E
与排放。在综合考虑NOx排放与燃烧经济性的平衡4 f2 w0 {& {# V
后,可以得到试验煤种的最佳参数范围,在此范围内" [7 F5 K, H- i. w1 k+ L0 C
可以实现低NOx高经济性的燃烧过程。: S0 J) F P& }. Z4 A6 q
【关键词】 煤粉燃烧 空气分级 氮氧化物 燃尽
% ]9 B- q, j( F* [率
/ p" m; [' h7 F( Z5 U Y" pAbstract Based upon the results of combustion test-, P, M' J- d/ K: }3 k7 ]
ing on one-dimensional pulverized coal fired boilers,4 f P l, l& U0 ]1 }! G( _
the impacts of air-staged combustion on the formation4 k, v" {& r6 `
characteristics of NOxand burn-up rate of pulverized
' ]7 i1 y- F/ c0 M8 @coal for four typical kinds of coal fired in utility boilers
J; A4 G" |( e q3 ain China were studied. The result analysis indicated% P/ {- T2 M% `4 f9 G \$ f! N: z8 e
that air-staged combustion could effectively reduce the
1 C4 g) v @, _3 d. f/ Iformation of NOxin furnace and its emission. Through$ g; R5 S* c( ?' |( H2 n, V+ D# m
the overall balance of NOxemission and combustion
2 Y# P8 B$ y, |" r, g/ Teconomics, the optimum parameter range of the tested
2 S( o6 C7 h2 b7 Pcoals can be obtained, and the efficient combustion
! \2 [: U; P# W. u7 Fprocess with low NOxemission within this range can% ]+ r; ?3 ^. s3 x9 b
be realized.
9 D# e5 k2 r- f: V4 JKey Words combustion of pulverized coal airstaged
9 Y9 r! J/ c! X, L nitrogen oxide burn-up rate |
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发表于 2009-9-17 16:48:34
