PM2.5声波团聚机理及技术的研究进展
Review of the Mechanism and Techniques of Acoustic Agglomeration for PM2.5
摘要
传统除尘设备对PM2.5的脱除能力不足，对PM2.5的控制刻不容缓。一种潜力大前景好的方法是先将PM2.5团聚成较大的颗粒，然后利用常规的除尘设备有效脱除。声波团聚技术是多种团聚技术中具有较大研究价值和应用前景的前沿技术之一。目前关于颗粒物声波团聚的研究已经取得了许多研究成果，但整体上尚处于实验室基础研究阶段，尚有许多基础性机理和关键技术需要取得突破。本文综述颗粒物声波团聚的主要机理和实验研究的现状和进展，分析当前面临的主要问题。通过综述分析认为，同向团聚作用和流体力学作用是声波团聚的主要机理，其他机理如声辐射力和声致湍流等仍需要进一步深入研究；对PM2.5团聚的可视化是声波团聚机理试验研究的重要发展方向；声波频率、声强、停留时间、声波团聚技术与其它团聚技术耦合、声波传递方向和流动方向之间夹角对团聚效率的影响规律是声波团聚技术重要研究方向。
Abstract
Traditional dust removal equipments are of low efficiency for PM2.5, so to control PM2.5 is urgent. One of the potential and promising ways for PM2.5 removal is to agglomerate fine particles first, then to remove larger particles by traditional dust removal equipments. Acoustic agglomeration is one of the frontier technologies with great research value and application prospect. Recently Lots of researches about it have been gained, but most of them were carried out in laboratories. There are still many basic mechanisms and key technologies that need to be broken through. In this paper, the state-of-art and developments of the main mechanism of acoustic agglomeration of particulate matter and its experimental researches are surveyed, and their main problems in the current are analyzed. Through the summary analysis, it is concluded that orthokinetic coagulation and hydrodynamic effect are chosen as the main mechanisms about acoustic agglomeration, but other mechanisms such as acoustic radiation pressure and acoustically generated turbulence still need to be further studied. Visualization for PM2.5 agglomeration is an important direction in the experimental research of acoustic agglomeration mechanism. The influence of acoustic frequency, sound intensity, residence time, acoustic agglomeration coupling with other agglomeration techniques, the angle between acoustic wave transfer direction and flow direction on agglomeration efficiency is also an important research direction of acoustic agglomeration technology.关键词
热能工程/PM2.5/声波团聚/团聚效率Key words
thermal engineering/PM2.5/acoustic agglomeration/agglomeration efficiency引用本文复制引用
林国星,刘洋,杨建国,淳良.PM2.5声波团聚机理及技术的研究进展[EB/OL].(2018-05-03)[2026-04-03].http://www.paper.edu.cn/releasepaper/content/201805-10.学科分类
环境污染、环境污染防治
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