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分级燃烧对NOx生成及燃烧经济性的影响' z/ N/ v- {6 l8 N' B7 K0 H+ z
Impact of Staged Combustion on Formation of NOxand Combustion Economics: F* n: e6 r! {9 g7 v$ M
电力工业部热工研究院 文 军 许传凯 (西安710032)6 I0 B2 A; S1 Q+ r5 Z6 N
【摘要】 根据一维煤粉炉上的燃烧试验结果,研究
: @3 z9 z0 t5 Z; e了空气分级燃烧对我国电站锅炉四种典型用煤的
4 |$ Z8 [9 _% ]6 |3 qNOx生成特性及煤粉燃尽率的影响。分析结果表
5 E: ?! P! ?2 m u明,空气分级燃烧可以有效地降低炉内NOx的生成
- `/ N0 a7 T- F/ w! C( z与排放。在综合考虑NOx排放与燃烧经济性的平衡1 U8 H$ a+ t# Q# Z
后,可以得到试验煤种的最佳参数范围,在此范围内
. y1 r. [4 g* |- s, X可以实现低NOx高经济性的燃烧过程。- ?) L& s. D4 X' ^& x
【关键词】 煤粉燃烧 空气分级 氮氧化物 燃尽
/ R- L6 f" a2 i3 z+ C1 P1 s率
+ ]# n# g4 y) o# A1 rAbstract Based upon the results of combustion test-4 K7 p0 N6 K, _, {2 m9 U
ing on one-dimensional pulverized coal fired boilers,
5 ^ M( Q( K, B' }- X9 b: qthe impacts of air-staged combustion on the formation. {3 v3 b! ?" P' j1 D2 }
characteristics of NOxand burn-up rate of pulverized6 k8 v. E6 H+ ~" G
coal for four typical kinds of coal fired in utility boilers. N7 o( @4 r( Y1 {9 S& ^# h3 S
in China were studied. The result analysis indicated7 l$ I' g) [* T
that air-staged combustion could effectively reduce the
/ N& ~5 n2 [; T; D6 j3 d$ ~formation of NOxin furnace and its emission. Through% c/ p0 F' b7 P9 W
the overall balance of NOxemission and combustion; D X) J3 y9 J( t. v; c. z ?" \
economics, the optimum parameter range of the tested. U, F2 }1 M& j1 T! ?/ R
coals can be obtained, and the efficient combustion
6 U7 g, u, G* X) O6 y+ jprocess with low NOxemission within this range can" _( M6 C7 Z2 c2 w0 C
be realized.
, K, z0 ~+ M" N/ }: aKey Words combustion of pulverized coal airstaged
: l7 B V" D3 F% M* o: {* k X+ U8 M. } nitrogen oxide burn-up rate |
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发表于 2009-9-17 16:48:34
