燃煤锅炉烟气中可吸入颗粒物的声凝并研究  

Research on acoustic agglomeration of particles in the flow-gas of coal-fuelled power plant

作　　者：王鹏[1] 骆仲泱 徐飞[1] 侯全辉[1] 高翔[1] 岑可法[1] 

机构地区：[1]浙江大学热能工程研究所,能源洁净利用国家重点实验室,杭州310027

出　　处：《环境科学学报》2008年第6期1052-1055,共4页Acta Scientiae Circumstantiae

基　　金：教育部科学技术研究重大项目资助(No.0305);教育部科学技术研究重点项目资助(No.03087)~~

摘　　要：可吸入颗粒物排放控制技术是现阶段的一个研究热点，声凝并是一种新型的控制燃煤锅炉可吸入颗粒物排放的方法之一．在内壁光滑的圆筒反应器中，利用压电换能器产生行波可以对小颗粒产生凝并作用．凝并效率受到凝并时间、声强、声波频率以及烟气温度等因素的影响．在1—2．5kHz范围内，1．5kHz是较好的声波频率；在同一频率下，随着声强的增加，凝并效率会相应提高，同时能耗也增加；随着温度的升高，凝并效率也逐渐增加；对于PM2.5来说，最佳凝并时间为3．3s，凝并效率可达60％以上．The control of PM2.5 has become a hot topic in environmental protection technology. Acoustic agglomeration is a new method to control PM2.5 emitted from coal-fuelled power plants. Standing wave is proved to have agglomeration ability for PM2.5. In this paper, experiments was carried on to test the agglomeration ability of traveling waves in a cylinder with smooth interior. We find that the agglomeration efficiency is concerned with the agglomeration time, sound frequency and intensity, the temperature of the flow gas, and other parameters. Between 1 and 2.5 kHz, 1.5kHz is considered the best frequency. With the increase of sound intensity, the agglomeration improves. At the same time, more energy is expended. The agglomeration efficiency increases with the temperature of the flow gas. The best agglomeration time for PM2.5 is 3.3s and the efficiency can be greater than 60%.

关 键 词：声凝并 PM2 5 小颗粒 除尘 

分 类 号：X701.2[环境科学与工程—环境工程]