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新型高活性吸收剂脱硫脱硝实验及机理研究( Y. A3 W; D$ C
# Q4 t7 K/ J- y' w; d
赵 毅, 马双忱, 方 华, 汪黎东, 赵 莉
0 O( N) w& \( g: s(华北电力大学环境科学与工程学院,保定071003)
& ~. g# z5 c0 {' q- M- r6 Z, u5 P; k+ N) A/ e( y
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
- t( A$ K8 J4 E5 q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- b8 E: k# g9 J9 {7 H
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2 N4 q, W* N- ~5 a7 N" o9 }
84%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- G. h! u+ n ~1 P% O
FGD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
. n% d1 |' T& Z& K3 v Z8参10
( @' ^# X; f) N; S! q, d) `! f' }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
+ u/ n9 S \( ~% d中图分类号:X511 文献标识码:A
, \& R8 G, e+ k) \Experimental Studies on Desulfurization and Denitrification with a! n: M3 O9 F# e
New Type of Highly Reactive Absorbent and the Effective Mechanism
( \( n* ?& l; C8 t z: j# U' eZHAO Yi, MAShuang-chen, FANG Hua, WANGLi-dong, ZHAO Li
) E. J$ c& U* e. g(School of Environmental Science and Engineering, North China University of Electric Power, Baoding 071003, China)6 R# ^: j6 M" |- e9 b% M
Abstract: The employed highly reactive absorbent with oxidizing capability was prepared in an anhydrous process by3 n5 u# A0 r% ?! _( H8 X' p
using fly ash, lime and some additives as the raw materials. Simultaneous desulfurization and denitrification tests were( c3 y; o8 X# L4 g9 G/ x
carried out in a flue duct, withthe objectof detectingthe factors that effectthe efficiencyof purification. The purification# W2 q8 {/ A; S6 N: K( f9 a
mechanism of highly reactive absorbents is being discussed. Test results showthatwith a Ca/(S+N) molar ratio of 1.2,
" T4 j$ W8 _4 @0 x4 S( e5 Dthe purification efficiencies of SO2andNOx removal are 84% and 61% respectively. Thewaste left over appeared in the% ~( e. c: ?# ?3 {& p
form of dry powder. The optimal gas temperature is 60°C, and the optimal humidity is 5%. Compared with traditional
* [9 @7 ]$ X8 j7 a! ~' ^dry FGD methods, this technology has the advantage of lower expenses, simpler equipment and facile disposal ofwastes.+ y3 n, |" e/ T, W
It may serve as a valuable reference for industrial application. Figs 8 and refs 10.
5 \$ ^" J4 g. l+ T3 s' {Key words: environmental engineering; simultaneous desulfurization and denitrification; highly active absorbent;0 u4 X- L( u5 F9 p) f, ]3 d. D
oxidation; experimental study; duct injection |
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发表于 2009-8-28 10:55:50
