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新型高活性吸收剂脱硫脱硝实验及机理研究
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赵 毅, 马双忱, 方 华, 汪黎东, 赵 莉' w- B. P" A- D. P/ l
(华北电力大学环境科学与工程学院,保定071003)
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摘 要:以粉煤灰、石灰、添加剂为原料,采用干法工艺制备了具有氧化能力的高活性吸收剂。在
) {5 ]; p U I# ]# {! I烟气管道进行了同时脱硫脱硝的实验,研究了影响脱除效率的若干因素。探讨了高活性吸收剂脱# v8 L$ D# Y# W8 ]+ ^& {
硫脱硝的机理。试验结果表明,在Ca/(S+N)克分子比为1.2时,SO2和NOx的脱除效率分别为
( w; Z+ J+ R0 S3 D% ?# c84%和61%。产生的废物为干粉状。最佳的烟气温度为60°C,烟气湿度为5%。与传统的干法
# U- l+ W0 S0 V6 M" c9 ?# UFGD相比,该工艺具有费用低、设备简单、废物易于处置等优点,可为工业化应用提供有益参考。图
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2 p. T( U J( s. w关键词:环境工程学;同时脱硫脱硝;高活性吸收剂;氧化;实验研究;管道喷射
' l9 d4 Q: P" C) x* h3 q中图分类号:X511 文献标识码:A+ S9 g) A* ~) _) t/ `, V) J K( x
Experimental Studies on Desulfurization and Denitrification with a4 G! ?# o j) j$ @1 c* G
New Type of Highly Reactive Absorbent and the Effective Mechanism
I% J3 E& T/ _ZHAO Yi, MAShuang-chen, FANG Hua, WANGLi-dong, ZHAO Li
0 ]' f2 b) Z7 O4 ^( }(School of Environmental Science and Engineering, North China University of Electric Power, Baoding 071003, China)7 T" B8 f! T' R, F+ B
Abstract: The employed highly reactive absorbent with oxidizing capability was prepared in an anhydrous process by5 T: t% U5 T7 p' D7 s' X5 F
using fly ash, lime and some additives as the raw materials. Simultaneous desulfurization and denitrification tests were: [2 r4 I4 v5 z2 A- k
carried out in a flue duct, withthe objectof detectingthe factors that effectthe efficiencyof purification. The purification `9 m* C6 T, c0 `8 z2 E5 d7 j
mechanism of highly reactive absorbents is being discussed. Test results showthatwith a Ca/(S+N) molar ratio of 1.2,
0 T+ f- O! I6 W8 pthe purification efficiencies of SO2andNOx removal are 84% and 61% respectively. Thewaste left over appeared in the
5 l5 }1 w3 ?9 Aform of dry powder. The optimal gas temperature is 60°C, and the optimal humidity is 5%. Compared with traditional
. r( F/ h( T6 g$ Y. d9 hdry FGD methods, this technology has the advantage of lower expenses, simpler equipment and facile disposal ofwastes.
8 E9 g; x. D. s b) D# z& }It may serve as a valuable reference for industrial application. Figs 8 and refs 10.
! L* h+ y; A w( J. }Key words: environmental engineering; simultaneous desulfurization and denitrification; highly active absorbent;3 Q9 ]9 @0 o/ S% R& U) j$ I
oxidation; experimental study; duct injection |
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发表于 2009-8-28 10:55:50
