循环流化床烟气脱硫技术实验研究CAJ【期刊文献】

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循环流化床烟气脱硫技术实验研究
& u; U# i4 m6 j  u0 j3 H王爱军,祁海鹰,由长福,徐旭常
(清华大学煤的清洁燃烧技术国家重点实验室,北京100084)
) `3 n" \  h% x2 S( z) ^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
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
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
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
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%。
关键词:循环流化床;烟气脱硫;蒸汽活化;脱硫效率
中图分类号:TQ534.9     文献标识码:A     文章编号:1006-8740(2000)04-0351-05
4 L3 _. p- [3 ]7 ^+ mExperimental Study of FGD Technology by CFB at 400~800℃
WANG Ai-jun, QI Hai-ying, YOU Chang-fu, XU Xu-chang
(The State Key Laboratory of Clean Combustion of Coal,Tsinghua University,
Beijing 100084,China)
) C5 m- l5 N5 }0 T/ e* G" QAbstract:A new type dry flue gas desulphurization proposal in a temperature range of 400~800℃has been
introduced.The experiment was done at 400~800℃in a circulating fluidized bed (CFB) using lime as absorbent
and fly ash collected from power plants as bed materials. To make the absorbents more effective, the spent
absorbent was treated by steam in the circulating loop. The experiments showed that the influence of gas
temperature on desulphurization efficiency was obvious, and perhaps there was an optimum desulphurization
efficiency near 600℃.As Ca/S was increased the desulphurization efficiency would be increased greatly.The Total
amount of bed materials was increased as the gas velocity inside the bed was decreased,so the desulphurization
. O/ y0 [7 `+ k# H* X- p- R9 ~efficiency would be increased. The steam reactivation was an effective method for increasing the absorbent
2 F( _' ]/ s4 j9 S7 w5 L5 R1 i$ nutilization because the desulphurization efficiency was increased by 42.1% after the absorbent was treated by
; E' q4 v, |2 \steam.Therefore the dry flue gas desulphurization technology in a CFB added steam reactivation is worth of
researching further.
* w7 g4 u5 e- BKeywords:CFB;flue gas desulphurization;steam reactivation;desulphurization efficiency