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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
" a) H0 T( X8 O
& N: g ~+ {% j( L% r: i吴祖良,高翔,骆仲泱,倪明江,岑可法1 Y; d1 @7 Y) N
(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)
" l# ~, ?) e4 I6 z. ?; q5 ?) ~ n: _
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SO20 a9 d7 ^9 f; ]3 t0 ?
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
6 @6 m9 K2 [% O; B; h' w) B% ?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7 g5 E) C2 N: i, Y
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。
$ s X$ W3 h7 o+ w6 I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
/ ^2 C0 z1 I+ ~0 a" M6 s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$ ?' B( C' Z8 |; |" d
酸铵和硝酸铵。" `7 M2 `1 R3 J+ P+ E2 u
关键词：电晕；自由基簇射；电催化氧化；脱硫；脱硝
$ H9 V) {5 h* l8 t2 k. A中图分类号：TQ534.9；X701.7文献标识码：A5 L% L: H# E& M J. g9 T, p
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Reactive Characteristics and Mechanism of the SO2 and NOx Simultaneous Removal* C8 K2 I2 w" c7 D/ p
Process Using a Radical Shower Electro-Catalytic Oxidation System4 [) O, G( s) ^& }6 d* m
WU Zu-liang,GAO Xiang,LUO Zhong-yang,NI Ming-jiang,CEN Ke-fa
. T* Z! s& l% e+ j$ T8 b' ^, I(State Key Laboratory of Clean Energy Utilization,Zhejiang University,Hangzhou 310027,China)
& s4 Z; u0 f P2 pAbstract:Experiments of simultaneously removing SO2 and NOx by using corona discharge radical shower% R; o7 f$ [8 y" [5 i5 f
technology were conducted.The reactive characteristics and the mechanism of the mutual influence between
9 W4 I- p; ~9 mpollutants on the removal effect were studied especially.The results show that with 0.042 L·min. L6 q& N. G6 l6 p
?1
; H, o6 r0 [8 g, x% }1 TNH3,50%" h ~1 `7 L- i5 u
SO2 can be removed without using discharge,however,using corona discharge can further improve SO2
' F5 y1 U" n* Y4 \3 r5 m' rremoval to a certain extent.Without discharge,the removal of NOx can nearly be ignored and its removal
- a( p" ~. d A7 t1 e7 @4 C' v' K* kdepends on the corona discharge process.With appropriate SO2 content,the NOx removal can be improved and4 T; O0 v: [9 u$ r
its maximum removal rate increase can reach 25%.However,overmuch SO2 content will restrain NOx removal.9 R1 B$ v3 l. {- H; |
The change of NOx removal rate with different SO2 initial concentrations is attributed to the reaction between. P4 j) m3 Y6 t% V
SO2 and NO2.The NO initial concentration has little effect on SO2 removal,and the components of flue gas8 U$ f+ ]! r. ]
have no significant effect on SO2 and NOx removal too.The X-ray diffraction analysis shows that the created( v1 y0 m6 k3 B% B, o, @
white crystal substances observed in the experiments are(NH4)2SO4 and NH4NO3.6 G9 e/ ]* d+ c9 J) Q& l
Key words:corona;radical shower;electro-catalytic oxidation;desulfurization;denitrification |
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发表于 2009-8-31 11:54:47
