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分级燃烧对NOx生成及燃烧经济性的影响
' v, B- t6 c+ B! K! M, W* X' z8 Y' xImpact of Staged Combustion on Formation of NOxand Combustion Economics
0 b# q2 w0 F) |0 |电力工业部热工研究院 文 军 许传凯 (西安710032)
! q, \8 v* f* E, ?( c【摘要】 根据一维煤粉炉上的燃烧试验结果,研究
5 z3 i: [* W6 K( F. S了空气分级燃烧对我国电站锅炉四种典型用煤的
$ b6 Z w/ H. t. fNOx生成特性及煤粉燃尽率的影响。分析结果表' @- C$ \1 @) c( d# M
明,空气分级燃烧可以有效地降低炉内NOx的生成
/ c5 [% O0 s8 J! K与排放。在综合考虑NOx排放与燃烧经济性的平衡
* m% H- @9 g& G, W6 }! Q: R7 R后,可以得到试验煤种的最佳参数范围,在此范围内) H% n: Q4 V0 a
可以实现低NOx高经济性的燃烧过程。
! q. `- L; u; ~【关键词】 煤粉燃烧 空气分级 氮氧化物 燃尽7 s% t9 Q0 }( V
率
1 i, p: W3 L3 _# o2 k$ z# u- ~Abstract Based upon the results of combustion test-
( W+ e6 f9 s1 `6 ting on one-dimensional pulverized coal fired boilers,
/ u$ j! Q- g. G" r4 zthe impacts of air-staged combustion on the formation
3 i1 }2 v6 c [. d) `3 dcharacteristics of NOxand burn-up rate of pulverized
: W; v0 a# R, @8 |4 bcoal for four typical kinds of coal fired in utility boilers
5 q5 ~& Q9 F y8 {7 U D8 Pin China were studied. The result analysis indicated; S! R+ ?$ c7 G8 l5 a" p# @
that air-staged combustion could effectively reduce the x2 A+ P& w% b! V! v& Z3 Y0 b
formation of NOxin furnace and its emission. Through, J/ [7 P! P3 w
the overall balance of NOxemission and combustion+ l' h9 A) Y* N2 @$ J
economics, the optimum parameter range of the tested! k7 l1 j' S: p; L J
coals can be obtained, and the efficient combustion0 b- K. b2 r! M& g+ w4 o
process with low NOxemission within this range can
6 B$ ~* I0 ]2 `2 N% tbe realized.
- S' }) \; P* @. o. ]5 XKey Words combustion of pulverized coal airstaged
9 t! o2 l" g: n7 R nitrogen oxide burn-up rate |
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发表于 2009-9-17 16:48:34
