关键词: 粉煤灰, 水力喷射空气旋流器, 湿法除尘, 去除重金属

Abstract: Aiming at the issues of low removal efficiency and high treatment cost of traditional dust removal equipment, this paper proposes a piece of supergravity separation equipment, water-sparged aerocyclone (WSA), for removal of particles from coal-fired power plants. The effects of initial dust concentration, liquid jet velocity, inlet air velocity and other operational factors on WSA dust removal efficiency are investigated.The results show that the removal efficiency of WSA for fine particles with a particle size larger than 1.5 μm can reach 99.40%, and it increases with the increase of the initial dust concentration, the liquid jet velocity, and the inlet air velocity. Meanwhile, a larger inlet air velocity also causes the pressure drop of the gas phase to rise significantly. The element detection before and after capture shows that fly ash particles contain Cr, As, Hg and other heavy metals, with an average removal rate of toxic heavy metals of 98.85%. The removal of dust particles by the wet capture method in the WSA can effectively reduce the risk of toxic pollution of heavy metals in the dust.