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
4 n5 e$ U: k# d/ y1 P0 D, `9 C; d王爱军,祁海鹰,由长福,徐旭常
9 H2 ~( i; _: c# p/ F9 k(清华大学煤的清洁燃烧技术国家重点实验室,北京100084)
1 b. P% ]  y; m0 p+ [% d( H- H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 c( V" G! l. {* }$ v5 C# S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
2 |  h: T9 W  S) Z  [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
" B8 N: n+ }$ k4 `. o( D+ Z9 z. v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%。
5 s4 B! R4 E& R1 G* P* V5 W关键词:循环流化床;烟气脱硫;蒸汽活化;脱硫效率
- ]& ?9 |9 u& O2 u6 i中图分类号:TQ534.9     文献标识码:A     文章编号:1006-8740(2000)04-0351-05
Experimental 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)
( f0 \6 I3 F* B& v8 ~8 o% i' M$ EAbstract:A new type dry flue gas desulphurization proposal in a temperature range of 400~800℃has been
( d+ E$ R; }' d- v. Eintroduced.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
6 n4 G3 Z3 c$ `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
% I/ p0 f  w2 k6 f9 D4 eefficiency 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
& V  T, A: m- k* l, ?, yefficiency 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.
  r, c8 w. A/ G8 J! w7 V& g: _Keywords:CFB;flue gas desulphurization;steam reactivation;desulphurization efficiency