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分级燃烧对NOx生成及燃烧经济性的影响' X3 l' F% e2 ~- l0 I
Impact of Staged Combustion on Formation of NOxand Combustion Economics
5 m" r/ u" L$ p! h. `- V& M电力工业部热工研究院 文 军 许传凯 (西安710032)
& j/ i# ^' n4 Y4 C# c& d【摘要】 根据一维煤粉炉上的燃烧试验结果,研究7 ]" u8 t+ t- E9 F8 G# N. N' N
了空气分级燃烧对我国电站锅炉四种典型用煤的+ ?1 @* Y+ g2 N; h+ M
NOx生成特性及煤粉燃尽率的影响。分析结果表( R/ V7 G& r/ g$ o Z
明,空气分级燃烧可以有效地降低炉内NOx的生成
5 S! v r1 D4 k! w) w与排放。在综合考虑NOx排放与燃烧经济性的平衡% S. J! t; R) o
后,可以得到试验煤种的最佳参数范围,在此范围内
7 a$ K$ o2 R0 U可以实现低NOx高经济性的燃烧过程。
9 v- {3 f4 e" N) n$ P( C8 S【关键词】 煤粉燃烧 空气分级 氮氧化物 燃尽
; F, f* O$ i3 F; a* Y! @8 F0 x, q0 |率; c* m1 X7 B# W' f$ ?8 X' s
Abstract Based upon the results of combustion test-5 N. B0 _7 Z) v2 Q
ing on one-dimensional pulverized coal fired boilers,
6 z! G! T0 b' ] F9 C) j7 Bthe impacts of air-staged combustion on the formation
9 w& }( a: W; c! kcharacteristics of NOxand burn-up rate of pulverized
% V |$ d7 c* \6 d e4 v- C) v" o ccoal for four typical kinds of coal fired in utility boilers" \' F6 Y. e: [1 @, Q: E) d
in China were studied. The result analysis indicated
. g* z8 M" Y# q/ M! Rthat air-staged combustion could effectively reduce the. L( U6 V4 L0 V: r; ^
formation of NOxin furnace and its emission. Through5 { e2 d. M; g% ^
the overall balance of NOxemission and combustion, c8 w" U# Z0 u+ E: n V3 t
economics, the optimum parameter range of the tested
" v/ r; G+ W E% z, I, @2 xcoals can be obtained, and the efficient combustion- { }, h3 H$ p* V' w! L- Y+ o2 d
process with low NOxemission within this range can
8 w/ ~+ n% Q7 t2 |. j8 L! H' ybe realized.
5 j- F+ X' ?( H5 Z1 \Key Words combustion of pulverized coal airstaged$ H3 z q% H6 E. H+ L
nitrogen oxide burn-up rate |
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发表于 2009-9-17 16:48:34
