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循环流化床烟气脱硫技术实验研究
2 F$ f2 v. O J+ y0 x, Z1 {' d+ T. d王爱军,祁海鹰,由长福,徐旭常
# |! m! p/ K2 @: q. @( i& \' R7 o(清华大学煤的清洁燃烧技术国家重点实验室,北京100084)' y u0 c# S* a! n$ z6 I. o) s
摘 要:提出一种干式烟气脱硫技术方案,并在400~800℃的温度下进行了实验研究。为了提高脱硫效率和脱硫- n: U& l& e2 J: ~
剂的利用率,还对在床内循环的脱硫剂进行了蒸汽处理。研究了烟气温度、Ca/S、床内气流速度、床内固体物料浓度
) t( L# _% b3 x等参数对脱硫效率的影响,以及各参数之间的关系。研究发现温度对脱硫效率有明显的影响,近600℃时最高。增6 U: _# z- }! O* O2 y+ e z8 T
加Ca/S可以大幅度提高脱硫效率。此外,适当降低床内气体流速使床内的总物料量增加,可以提高脱硫效率。研究' S, Q9 R+ Q p0 R" |3 p: k
表明,蒸汽处理对脱硫效率的提高有明显效果,在本实验条件下,处理后的脱硫效率提高42.1%。7 }0 e) Q0 c( `6 {: S) o
关键词:循环流化床;烟气脱硫;蒸汽活化;脱硫效率" A [ m6 a# A* Y- j0 ?
中图分类号:TQ534.9 文献标识码:A 文章编号:1006-8740(2000)04-0351-05
8 y3 O# i: r7 B6 {: TExperimental Study of FGD Technology by CFB at 400~800℃- i9 X y/ y5 Q1 N
WANG Ai-jun, QI Hai-ying, YOU Chang-fu, XU Xu-chang& r& `3 n3 i7 {9 ]+ e2 ]
(The State Key Laboratory of Clean Combustion of Coal,Tsinghua University,* ^0 b N' Y) k: I' N) R. q; ?( z
Beijing 100084,China)
2 w- N% E3 K9 N) D. cAbstract:A new type dry flue gas desulphurization proposal in a temperature range of 400~800℃has been- y; j ^" G6 f. z
introduced.The experiment was done at 400~800℃in a circulating fluidized bed (CFB) using lime as absorbent
0 S; u8 w6 s) x: h6 |and fly ash collected from power plants as bed materials. To make the absorbents more effective, the spent" n3 [2 n9 V$ p3 M" I! F4 w
absorbent was treated by steam in the circulating loop. The experiments showed that the influence of gas5 g" k% _( V8 F; F/ f3 A
temperature on desulphurization efficiency was obvious, and perhaps there was an optimum desulphurization
3 g. T3 L3 S" C" G0 c1 Y3 K0 refficiency near 600℃.As Ca/S was increased the desulphurization efficiency would be increased greatly.The Total0 Q, D9 l6 F. O7 [* t# Y- d
amount of bed materials was increased as the gas velocity inside the bed was decreased,so the desulphurization$ O w) g2 {% \. X: |2 w9 S9 h
efficiency would be increased. The steam reactivation was an effective method for increasing the absorbent; }6 O$ W- D8 ?; {- i
utilization because the desulphurization efficiency was increased by 42.1% after the absorbent was treated by
+ M4 R& m7 x# Q/ s4 N- t0 a' I. Jsteam.Therefore the dry flue gas desulphurization technology in a CFB added steam reactivation is worth of
0 o ?3 d$ x) D5 W: e1 [, J Eresearching further.
% ~* K; X4 f) o4 u' L2 mKeywords:CFB;flue gas desulphurization;steam reactivation;desulphurization efficiency |
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发表于 2009-9-3 09:47:19
