关键词: 可吸入颗粒, 团聚, 声波, 气氛, 相对湿度

Abstract:

Acoustic wave was introduced into the agglomeration chamber to intensify the collision among particles and promote their agglomeration under the atmosphere of air, CO₂, and gas mixture of CO₂ and N₂.The experimental results show that, under different atmospheres, acoustic wave has different entrainment effect on the same fly ash particles generated in coal combustion, which causes different agglomeration effect.Under the air atmosphere, the particle removal efficiency is the maximum among the three experimental atmospheres, about 37%.As the gas flow rate increases, the removal efficiency increases; at the gas velocity of 10 m·s^-1, the particle removal efficiency achieves the maximum; while at higher gas velocity, the gas velocity has negligible effect on particle removal.Relative humidity influences the moisture content between particles, so that the capillary forces between particles increase.When the relative humidity reaches 42%, the removal efficiency approaches the highest level.

Key words: 可吸入颗粒, 团聚, 声波, 气氛, 相对湿度