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新型高活性吸收剂脱硫脱硝实验及机理研究5 Q# h, K1 l8 |2 W9 Y& L# L8 R0 S( e
o% T4 j- s% V
赵 毅, 马双忱, 方 华, 汪黎东, 赵 莉
4 L5 n3 A; t, l/ J! h7 y(华北电力大学环境科学与工程学院,保定071003)
9 j5 H6 {8 A3 T$ {$ P1 \' l0 f" Y& t6 h! ?! ~4 `
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& _ c: \' I5 G8 R
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- m$ h" q& w" F: h4 v8 r
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 W0 e8 }! n o0 G84%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 k( r6 d& \5 X, y7 z
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$ O# a$ b( C* J5 k; E8 o
8参10
" m" h" r9 n. O1 r- b; w( W4 I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: `# E! r5 D6 h/ G) P, O
中图分类号:X511 文献标识码:A; d' ]- C$ p6 m4 O- u! Y
Experimental Studies on Desulfurization and Denitrification with a
& Z A$ J; a! B. f9 T6 pNew Type of Highly Reactive Absorbent and the Effective Mechanism& C2 B- @% B: K% O( d) k t
ZHAO Yi, MAShuang-chen, FANG Hua, WANGLi-dong, ZHAO Li
0 q) Q3 f$ ]- }(School of Environmental Science and Engineering, North China University of Electric Power, Baoding 071003, China)
2 T8 ?: L! Y1 _; mAbstract: The employed highly reactive absorbent with oxidizing capability was prepared in an anhydrous process by3 Q: v$ A( c, L/ y* O' C( q
using fly ash, lime and some additives as the raw materials. Simultaneous desulfurization and denitrification tests were
1 @/ I( H; }) j. Z% d' Mcarried out in a flue duct, withthe objectof detectingthe factors that effectthe efficiencyof purification. The purification2 B7 O+ x7 \- u2 w! w* q
mechanism of highly reactive absorbents is being discussed. Test results showthatwith a Ca/(S+N) molar ratio of 1.2,2 p$ P' }0 q. ?1 Z2 [; L
the purification efficiencies of SO2andNOx removal are 84% and 61% respectively. Thewaste left over appeared in the: m4 S8 l5 U: r+ b
form of dry powder. The optimal gas temperature is 60°C, and the optimal humidity is 5%. Compared with traditional) C" u; K9 I% x1 ~- U/ c0 i
dry FGD methods, this technology has the advantage of lower expenses, simpler equipment and facile disposal ofwastes.; n" U3 u8 D- r# ^& J- f J8 [8 r
It may serve as a valuable reference for industrial application. Figs 8 and refs 10.
; o) w3 i; B4 X" t( }0 SKey words: environmental engineering; simultaneous desulfurization and denitrification; highly active absorbent;: ?) e+ ~- n) C; U, ]" H% J7 {
oxidation; experimental study; duct injection |
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发表于 2009-8-28 10:55:50
