| 声场作用下纳米颗粒的流化行为 |
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| 引用本文： | 李彦,刘会娥,郭庆杰,王铭华,陈爽,王杰武.声场作用下纳米颗粒的流化行为[J].中国石油大学学报(自然科学版),2007,31(5):99-103. |
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| 作者姓名： | 李彦 刘会娥 郭庆杰 王铭华 陈爽 王杰武 |
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| 作者单位： | 1. 中国石油大学,化学化工学院,山东,东营,257061
2. 西安长庆科技工程公司,陕西,西安,710021 |
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| 基金项目： | 山东省自然科学基金;教育部留学回国人员科研启动基金;中国石油大学校科研和教改项目 |
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| 摘 要： | 在56 mm的玻璃流化床中,对纳米SiO2和TiO2颗粒在不同频率和声压级声场辅助下的流化行为进行了研究。实验表明,在低频（40-60 Hz）和高声压级（高于100 dB）的声场条件下,沟流和节涌得到有效抑制,纳米颗粒形成均一稳定的聚团,实现平稳流化。随声压级升高,颗粒的最小流化速度减小,流化行为类似Geldart A类颗粒。在声场的其他条件下,纳米颗粒的流化行为与不加声场相似,无法实现稳定流化。
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| 关 键 词： | 纳米颗粒 声场 流化 聚团 |
| 文章编号： | 1673-5005（2007）05-0099-05 |
| 修稿时间： | 2007-04-27 |
Fluidization performances of nanometer particles with sound field reflecting |
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| LI Yan,LIU Hui-e,GUO Qing-jie,WANG Ming-hua,CHEN Shuang,WANG Jie-wu.Fluidization performances of nanometer particles with sound field reflecting[J].Journal of China University of Petroleum,2007,31(5):99-103. |
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| Authors: | LI Yan LIU Hui-e GUO Qing-jie WANG Ming-hua CHEN Shuang WANG Jie-wu |
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| Abstract: | Under different sound pressure levels and different frequencies, the fluidization performances of SiO2 and TiO2 nanometer particles were investigated in a glass fluidized bed with diameter of 56 mm. Under the conditions of low frequency of 40 -60 Hz and sound pressure level higher than 100 dB, the slug and channel can be eliminated, and the fluidization quality was promoted. Even and stable agglomerates were formed by nanometer particles. The minimum fluidization velocity decreases sharply with the sound pressure level increasing, and the fluidized curve inclines to the Geldart A group particles. It is also indicated that the different phenomena among kinds of particles were obvious. |
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| Keywords: | nanometer particles acoustic field fluidization agglomerates |
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