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
) h6 ]8 k% U' ^) b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)
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
- D4 l7 m- b( D. `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
" r/ Z" n" q9 \7 b' U中图分类号:TQ534.9     文献标识码:A     文章编号:1006-8740(2000)04-0351-05
- G# H" ?  F* ?  ^2 HExperimental Study of FGD Technology by CFB at 400~800℃
) h/ \! p5 A9 ~0 UWANG Ai-jun, QI Hai-ying, YOU Chang-fu, XU Xu-chang
(The State Key Laboratory of Clean Combustion of Coal,Tsinghua University,
9 w  F' U5 O) F0 j+ L9 m7 xBeijing 100084,China)
  r8 Y6 k; `+ z6 x4 A! Z- PAbstract:A new type dry flue gas desulphurization proposal in a temperature range of 400~800℃has been
7 m3 s: K5 ?* }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
' W( x! o" `' m5 ?( }) `! y5 O! Cabsorbent was treated by steam in the circulating loop. The experiments showed that the influence of gas
0 [. h( b) p, r  W! q$ otemperature on desulphurization efficiency was obvious, and perhaps there was an optimum desulphurization
7 E9 I* ^5 P! R( k$ iefficiency near 600℃.As Ca/S was increased the desulphurization efficiency would be increased greatly.The Total
. E( s* t$ ~/ r) [$ {amount of bed materials was increased as the gas velocity inside the bed was decreased,so the desulphurization
" ~  G! r) s( I' xefficiency would be increased. The steam reactivation was an effective method for increasing the absorbent
utilization because the desulphurization efficiency was increased by 42.1% after the absorbent was treated by
steam.Therefore the dry flue gas desulphurization technology in a CFB added steam reactivation is worth of
researching further.
# e% }) g# E- wKeywords:CFB;flue gas desulphurization;steam reactivation;desulphurization efficiency