Removal of fine particles in converter primary flue gas by acoustic wave coupling swirl process
LIU Xiao-lin1, DU Jian-min2, HUANG Yan-jun1, LIU Heng1, SONG Guang-sen1, ZHANG Lei1
1. School of Chemistry and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, Hubei, China; 2. Energy and Environment Department, Wuhan Iron and Steel Co., Ltd., Wuhan 430080, Hubei, China
Abstract：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 1 400 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.
柳晓琳, 杜健敏, 黄炎俊, 刘恒, 宋光森, 张垒. 声波耦合旋流对转炉一次烟气细颗粒物的去除[J]. 中国冶金, 2022, 32(7): 114-121.
LIU Xiao-lin, DU Jian-min, HUANG Yan-jun, LIU Heng, SONG Guang-sen, ZHANG Lei. Removal of fine particles in converter primary flue gas by acoustic wave coupling swirl process[J]. China Metallurgy, 2022, 32(7): 114-121.
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2022, Vol. 32 
