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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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. a) t% x) e# {赵 毅, 马双忱, 方 华, 汪黎东, 赵 莉0 d9 P/ ]1 Q7 M
(华北电力大学环境科学与工程学院,保定071003)) ?$ a2 c8 Z5 X( I
) [2 A/ b0 V6 X r5 ]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' L) m) w9 ]1 T- S v3 Z
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6 Q; K" X3 s2 F& ` x3 Y$ j6 j
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
! c" B9 J; y. x6 t, t) O- H: i84%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
- M4 c/ a8 G+ d. j; p# ZFGD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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, g6 K I* ]/ X1 m# Q+ y" N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
0 u- ^: E( T/ d ]中图分类号:X511 文献标识码:A2 H: ]( Z( V8 @ o6 p: ~
Experimental Studies on Desulfurization and Denitrification with a" s/ c u. G. s p( W
New Type of Highly Reactive Absorbent and the Effective Mechanism
) c8 Q- B, z7 U" I' ^" [" p& GZHAO Yi, MAShuang-chen, FANG Hua, WANGLi-dong, ZHAO Li2 ]: p3 I1 D2 n9 g7 H: g$ O- ?
(School of Environmental Science and Engineering, North China University of Electric Power, Baoding 071003, China)1 J6 V. A+ }- U1 I6 \4 N. |: C+ z, E
Abstract: The employed highly reactive absorbent with oxidizing capability was prepared in an anhydrous process by
5 q4 |/ _8 A. e; `4 q) @9 t: d" ousing fly ash, lime and some additives as the raw materials. Simultaneous desulfurization and denitrification tests were# T7 o/ h; Z! |4 c4 e0 ^' ^
carried out in a flue duct, withthe objectof detectingthe factors that effectthe efficiencyof purification. The purification1 R5 j! `* _2 [4 X
mechanism of highly reactive absorbents is being discussed. Test results showthatwith a Ca/(S+N) molar ratio of 1.2,/ n6 a% K4 @3 ]/ r: j7 U- |/ w
the purification efficiencies of SO2andNOx removal are 84% and 61% respectively. Thewaste left over appeared in the
* k2 h! D4 z; s+ Tform of dry powder. The optimal gas temperature is 60°C, and the optimal humidity is 5%. Compared with traditional, ~9 T# H W) e! k" }7 n0 A
dry FGD methods, this technology has the advantage of lower expenses, simpler equipment and facile disposal ofwastes.6 ^+ C3 X2 r( s/ H; X
It may serve as a valuable reference for industrial application. Figs 8 and refs 10.! v' b5 m* Z/ T% `. y) A' D1 e
Key words: environmental engineering; simultaneous desulfurization and denitrification; highly active absorbent;
2 h/ R. Y- g. N$ {$ f$ G7 _oxidation; experimental study; duct injection |
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发表于 2009-8-28 10:55:50
