低浓度细颗粒物声波团聚及喷雾优化实验

陶威; 徐超; 仲兆平

doi:10.13205/j.hjgc.202010026

低浓度细颗粒物声波团聚及喷雾优化实验

doi: 10.13205/j.hjgc.202010026

东南大学能源与环境学院, 南京 210096

基金项目:

江苏省科技成果转化专项资金项目（BA2017088）。

详细信息

作者简介:
陶威(1993-),男,硕士,主要研究方向为大气污染控制。2217323032@qq.com

通讯作者:
仲兆平(1965-),男,博士,教授,博士生导师。zzhong@seu.edu.cn

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- 文章访问数: 195
- HTML全文浏览量: 40
- PDF下载量: 6
- 被引次数: 0
出版历程
- 收稿日期: 2019-11-19

EXPERIMENTAL STUDY ON ACOUSTIC AGGLOMERATION AND COMBINED SPRAY OPTIMIZATION OF FINE PARTICLES AT LOW CONCENTRATION

School of Energy and Environment, Southeast University, Nanjing 210096, China

摘要

摘要: 常规除尘器无法有效去除PM_2.5，而声波能有效增加颗粒物之间的碰撞、团聚，使PM_2.5粒径增大，是一种非常有前景的除尘预处理技术。主要研究了声波频率、声压级、初始浓度及停留时间对声波团聚效率的影响，发现在低频声波作用下效果更好，而纯声波作用下最佳团聚效率为44.84%。并对粉尘进行扫描电镜分析，对比了实验前后的粉尘形态，验证了声波对气溶胶颗粒的团聚作用。利用喷雾作为辅助手段，可以进一步提高团聚效率，降低声波团聚的能耗。在相同情况下，添加喷雾可以使团聚效率从43.07%增加到66.48%，说明喷雾联合声波作用是非常有效的除尘预处理技术。
- 气溶胶 /
- 声波团聚 /
- 粒径分布 /
- 效率 /
- 优化
Abstract: Fine particles are inflicting great harm on human health due to their small particle size and absorption of hazardous components on them. But the conventional dust remover cannot remove it effectively. Sound wave can effectively increase the collision and agglomeration of particles and increase the particle size of PM_2.5, which is a promising dust removal pretreatment technology. The acoustic frequency, sound pressure level (SPL), initial concentration and residence time are the main factors for the acoustic agglomeration efficiency. It was found that the effect was better under the action of low frequency sound wave, but the best agglomeration efficiency was only 43.07% under the action of pure acoustic agglomeration. The dust morphology before and after the experiment was compared by scanning electron microscope, and the agglomeration effect of acoustic wave on aerosol particles was verified. Then this study used spray as an auxiliary means to further improve the agglomeration efficiency and reduce the energy consumption of acoustic agglomeration. The effects of frequency, SPL and spray volume on the agglomeration efficiency were investigated. The agglomeration efficiency increased to 66.48% after spray. It showed that spray combined with acoustic agglomeration was an effective dust removal pretreatment technology.
- aerosol /
- acoustic agglomeration /
- particle size distribution /
- efficiency /
- optimization

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