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自由基簇射电催化氧化同时脱硫脱硝过程反应特性及机理研究3 X: E2 i# r3 F( @6 f2 U) o) G, h* N
' x L- o) m# [+ K3 c吴祖良,高翔,骆仲泱,倪明江,岑可法
& M5 e0 X9 v, Y' I7 y(浙江大学热能工程研究所,能源清洁利用国家重点实验室,浙江杭州310027)
# G3 X% X2 K3 L/ c" c0 A% q9 m4 b6 z4 \$ a; k8 E
摘要：应用一种新型的电催化氧化技术??电晕放电自由基簇射技术进行了烟气同时脱硫脱硝实验，重点分析了SO2
\" u6 n/ K Z! w和NOx脱除的反应特性和相互影响机理。结果表明：在0.042 L?min?1的氨气注入下，50%的SO2在放电前被脱除，但
3 L; K o5 W1 U: _* I0 j! e$ `) V5 R放电过程仍对SO2的脱除有一定的促进作用。而NOx的脱除取决于放电过程，放电前的脱除几乎可以忽略不计。在脱
% h1 v, E. V/ r7 [除过程中，适量的SO2能够提高NOx的脱除，最大能使NOx脱除率提高25%，但过高的SO2又使NOx的脱除趋于减少。
7 E- p8 K) H3 @不同SO2初始浓度下NOx脱除率的变化主要归因于SO2和NO2之间的反应。NO初始浓度的变化对SO2的脱除影响较
4 L, C- _( g$ M }& r小。烟气成分的变化对SO2和NOx的脱除影响也不明显。在脱硫脱硝过程中，观察到的白色晶体状物质主要成分是硫
- y' B' C) q+ E2 F; [酸铵和硝酸铵。
2 s8 g+ R2 y. ], h. w. h关键词：电晕；自由基簇射；电催化氧化；脱硫；脱硝' ] O2 @" ]* i
中图分类号：TQ534.9；X701.7文献标识码：A
+ O8 D5 q' e7 h8 I7 k' }: Y1 L: A! B, G! `, s# @/ ?
Reactive Characteristics and Mechanism of the SO2 and NOx Simultaneous Removal
* G5 w1 S8 E/ f+ J% T+ EProcess Using a Radical Shower Electro-Catalytic Oxidation System$ l0 Y2 s* {& _2 B S+ @ ]
WU Zu-liang,GAO Xiang,LUO Zhong-yang,NI Ming-jiang,CEN Ke-fa
; ?0 [0 D$ ^3 u+ b(State Key Laboratory of Clean Energy Utilization,Zhejiang University,Hangzhou 310027,China)
, f s/ B+ F- a( v$ TAbstract:Experiments of simultaneously removing SO2 and NOx by using corona discharge radical shower& q5 X& x6 E+ I& i
technology were conducted.The reactive characteristics and the mechanism of the mutual influence between8 r& d/ I3 k3 z$ w; g
pollutants on the removal effect were studied especially.The results show that with 0.042 L·min
# |, O8 |5 a: }) d0 t?1( O* g; @' g& \
NH3,50%7 k* b0 h+ i& X; T( w
SO2 can be removed without using discharge,however,using corona discharge can further improve SO2
5 w9 g! l* u0 `removal to a certain extent.Without discharge,the removal of NOx can nearly be ignored and its removal
& {7 a! T; X3 y! g+ ydepends on the corona discharge process.With appropriate SO2 content,the NOx removal can be improved and8 @+ j F) H+ o
its maximum removal rate increase can reach 25%.However,overmuch SO2 content will restrain NOx removal.
( Q/ D! s% A' i4 l9 f( }- w) [The change of NOx removal rate with different SO2 initial concentrations is attributed to the reaction between4 X/ b; H+ h# N8 _7 G
SO2 and NO2.The NO initial concentration has little effect on SO2 removal,and the components of flue gas/ t% B- g. A9 y0 _- N7 P
have no significant effect on SO2 and NOx removal too.The X-ray diffraction analysis shows that the created
+ M" U' P, L5 W. Dwhite crystal substances observed in the experiments are(NH4)2SO4 and NH4NO3.
# g; h [* b W3 r4 K4 W3 dKey words:corona;radical shower;electro-catalytic oxidation;desulfurization;denitrification |
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发表于 2009-8-31 11:54:47
