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循环流化床烟气脱硫技术实验研究 7 U( T9 ~* k, R o. V2 Q) o4 ?
王爱军,祁海鹰,由长福,徐旭常
! A( K* n1 i2 ^# d(清华大学煤的清洁燃烧技术国家重点实验室,北京100084)" N4 i4 g: }3 U$ k$ G
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
4 |( E, ]) g# r6 c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: R# z+ M" f7 e
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$ O2 ^ a) _, `" S( o( A3 P
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- j& Z. _, m% } |7 Y. U
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%。
3 D" v) m# Q9 R5 R关键词:循环流化床;烟气脱硫;蒸汽活化;脱硫效率
9 B6 A5 j2 y; a7 ?% d中图分类号:TQ534.9 文献标识码:A 文章编号:1006-8740(2000)04-0351-05
& \- ?) e+ @0 @! EExperimental Study of FGD Technology by CFB at 400~800℃4 L t' l& e+ a0 e! X; E1 e
WANG Ai-jun, QI Hai-ying, YOU Chang-fu, XU Xu-chang- q, {3 Y3 @3 d* O) T
(The State Key Laboratory of Clean Combustion of Coal,Tsinghua University,
9 b- l, G6 y7 o1 Q7 R$ ~Beijing 100084,China)5 X+ B7 C# B, P7 q) R O0 X
Abstract:A new type dry flue gas desulphurization proposal in a temperature range of 400~800℃has been
/ v; q$ d8 }& Z7 Nintroduced.The experiment was done at 400~800℃in a circulating fluidized bed (CFB) using lime as absorbent
; W6 Z" T" P$ i# Zand fly ash collected from power plants as bed materials. To make the absorbents more effective, the spent, r/ r! S* `: g1 l1 F
absorbent was treated by steam in the circulating loop. The experiments showed that the influence of gas
0 ?2 s( {& y# n: `* ?# T# G+ m7 Ktemperature on desulphurization efficiency was obvious, and perhaps there was an optimum desulphurization7 V; }# S5 l4 s$ E6 w: d& R
efficiency near 600℃.As Ca/S was increased the desulphurization efficiency would be increased greatly.The Total
0 |8 R, @5 R1 j" Lamount of bed materials was increased as the gas velocity inside the bed was decreased,so the desulphurization
, d0 ?2 D9 E% I# r6 ]efficiency would be increased. The steam reactivation was an effective method for increasing the absorbent
* `% R2 n+ B% Qutilization because the desulphurization efficiency was increased by 42.1% after the absorbent was treated by
) g' P& w' O$ e c& p2 V- q4 Usteam.Therefore the dry flue gas desulphurization technology in a CFB added steam reactivation is worth of
4 a( {% C9 M' U9 mresearching further.
# z' G2 n: Q2 H- ?( DKeywords:CFB;flue gas desulphurization;steam reactivation;desulphurization efficiency |
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发表于 2009-9-3 09:47:19
