摘要
烟气脱水技术需要将冷凝超细雾滴进行有效分离,针对普通除雾器效率低、勾板除雾器阻力大的问题,且为提高除雾器对冷凝超细雾滴的综合性能,设计了一种百叶窗除雾器,并利用数值模拟方法对三种除雾器性能进行了对比分析。普通除雾器难以将粒径小于15μm的雾滴脱除;勾板除雾器能够较大程度改善细雾滴的除雾效率,但对于5μm以下的超细雾滴的脱除率仍然很低,且系统阻力较大;百叶窗除雾器具有接近于勾板除雾器的除雾效率,尤其是对超细雾滴有更优越的脱除效率,且在低风速下的表现也更加突出。百叶窗除雾器的系统阻力介于普通除雾器和勾板除雾器之间,因此具有优越的综合性能,对于烟气脱水技术的实施具有重要的现实意义。
Highly effective separation of tiny droplet was an essential part of fume dehydration. In order to obtain both higher demist efficiency and less system resistance, a novel mist eliminator with shutter was designed. Numerical simulation were carried out on the three mist eliminators. The results of numerical simulation suggested that the conventional eliminator could not eliminate droplet with 15 μm. Accompanied by system resistance rising, eliminator with hamulus could highly increase demist efficiency, but it could not eliminate 5 μm tiny droplet too. Adopting eliminator with shutter could be very good to deal with the bad performance of tiny droplet demisting, especially in low fume velocity, which could highly increase demist efficiency with less extra resistance. Through numerical simulation study, the basis of design and optimization of mist eliminator for wet flue gas dehydration were provided.
作者
周晓蒙
赵虹
陈永辉
蒋狄希
赵敏
陈理帅
王晨辉
杨建国
ZHOU Xiao-meng;ZHAO Hong;CHEN Yong-hui(State Key Laboratory of Clean Energy Utilization,Zhejiang University,Hangzhou 310027,China;Zhejiang Energy Yueqing Power Generation Co.,Ltd,Wenzhou 325000,China;Zhejiang Zheneng Energy-Saving Technology Co.,Ltd,Hangzhou 310007,China)
出处
《能源工程》
2019年第1期61-68,共8页
Energy Engineering
关键词
烟气脱水
冷凝超细雾滴
百叶窗除雾器
除雾效率
系统阻力
数值模拟
fume dehydration
dehydration tiny droplet
mist eliminator with shutter
demisting efficiency
system resistance
numerical simulation
