声波耦合旋流对转炉一次烟气细颗粒物的去除  

Removal of fine particles in converter primary flue gas by acoustic wave coupling swirl process

作　　者：柳晓琳 杜健敏 黄炎俊 刘恒 宋光森 张垒 LIU Xiao-lin;DU Jian-min;HUANG Yan-jun;LIU Heng;SONG Guang-sen;ZHANG Lei(School of Chemistry and Environmental Engineering,Wuhan Polytechnic University,Wuhan 430023,Hubei,China;Energy and Environment Department,Wuhan Iron and Steel Co.,Ltd.,Wuhan 430080,Hubei,China)

机构地区：[1]武汉轻工大学化学与环境工程学院,湖北武汉430023 [2]武汉钢铁有限公司能环部,湖北武汉430080

出　　处：《中国冶金》2022年第7期114-121,共8页China Metallurgy

基　　金：武汉轻工大学科技基金资助项目(118-53210052171,53210052144,53210052136)。

摘　　要：针对钢铁厂转炉一次烟气含尘浓度高、颗粒物细的特点,提出一种声波耦合旋流除尘新技术,用于降低转炉一次烟气细颗粒物浓度。采用单因素试验和响应面法研究了声压级、声频率、停留时间及烟气进气方式对颗粒物浓度降低率的影响。单因素试验结果表明,转炉一次烟气颗粒物团聚效率随声压级升高而增大,但存在最佳团聚频率。相比单一声波团聚,声波耦合旋流除尘技术对细颗粒物有很好的团聚效果。响应面法优化试验得出,当声压级为140 dB、声频率为1400 Hz、停留时间为8 s时,采用旋流进气方式颗粒物浓度降低率最高,达33%。研究结果为提高转炉一次烟气中细颗粒物的去除效率及工艺开发提供参考。In view of characteristics of high dust concentration and fine particles in primary flue gas for converter in iron and steel plant,a new technology of acoustic wave coupling swirl dust removal was proposed to reduce the fine particle concentration in the primary flue gas of converter.The effects of sound pressure level,sound frequency,residence time and flue gas inlet mode on the reduction rate of particle concentration were studied by single factor test and response surface method.Single factor test results show that effect of acoustic agglomeration on primary flue gas particles is enhanced with the increase of sound pressure level,but there is an optimal agglomeration frequency.Compared with single acoustic agglomeration,acoustic wave coupling cyclone dust removal technology has better agglomeration effect on fine particles.The response surface method optimization test shows that when the sound pressure level is 140 dB,the sound frequency is 1400 Hz and the residence time is 8 s,the particle concentration reduction rate is the highest,and the particle concentration reduction rate can reach 33%when swirl gas inlet mode is adopted.This study provides a reference for improving the removal efficiency of fine particles in primary flue gas for converter and process development.

关 键 词：转炉一次烟气 声波团聚 旋流 细颗粒物 响应面法 

分 类 号：TF71[冶金工程—钢铁冶金]