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分级燃烧对NOx生成及燃烧经济性的影响- Q" z3 I; e3 C6 I- p5 D: K! @
Impact of Staged Combustion on Formation of NOxand Combustion Economics2 j+ C. a+ J2 ^6 W! E" w/ k
电力工业部热工研究院 文 军 许传凯 (西安710032)
: W7 T% a, J. c6 @8 R$ ~【摘要】 根据一维煤粉炉上的燃烧试验结果,研究
: A0 ^) h" R5 L1 ^0 v: ~了空气分级燃烧对我国电站锅炉四种典型用煤的2 L+ i. v. W6 o
NOx生成特性及煤粉燃尽率的影响。分析结果表# S6 W! d0 }2 u! T4 R2 E. X- r
明,空气分级燃烧可以有效地降低炉内NOx的生成! s6 w+ [" T/ H7 N( W
与排放。在综合考虑NOx排放与燃烧经济性的平衡
5 c/ T& }' b- T, v后,可以得到试验煤种的最佳参数范围,在此范围内
) l% `3 \, C# a2 H可以实现低NOx高经济性的燃烧过程。
+ U. D/ N1 S% T \) K% h! B【关键词】 煤粉燃烧 空气分级 氮氧化物 燃尽
% o; W7 R! S% ~$ E0 r; l3 M+ A率
* t' E8 H+ N7 w; TAbstract Based upon the results of combustion test-
$ T' r6 P2 h& h- {ing on one-dimensional pulverized coal fired boilers,3 i# A/ `' X7 u0 ]
the impacts of air-staged combustion on the formation
/ e+ L7 V7 ?2 ^' F ucharacteristics of NOxand burn-up rate of pulverized
$ ]5 J1 ^! [4 U, qcoal for four typical kinds of coal fired in utility boilers
: k. q2 I- b8 Q. V% vin China were studied. The result analysis indicated
7 ^8 l4 P; e }; U$ }0 j7 {( hthat air-staged combustion could effectively reduce the" G) k! v8 G$ j% h f1 _; i
formation of NOxin furnace and its emission. Through/ A1 a1 _; s3 h9 R
the overall balance of NOxemission and combustion
( O6 n5 D& V2 N" k' n$ u1 H2 x1 [economics, the optimum parameter range of the tested/ W+ F3 y6 g x; ^- D
coals can be obtained, and the efficient combustion: i( h6 W# O( S4 B' A
process with low NOxemission within this range can4 q+ _: D' {- f4 p
be realized.; z9 I: X- _+ m9 o+ U+ I! j
Key Words combustion of pulverized coal airstaged
% J: y6 v3 ?3 I; M9 Y+ q nitrogen oxide burn-up rate |
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发表于 2009-9-17 16:48:34
