声场流化床中超细颗粒聚团受力与尺寸
Acting Forces and Agglomerate Sizes of Super Fine Particles in an Acoustic Fluidized Bed
查看参考文献23篇
|
文摘
|
在内径40 mm的流化床中, 采用平均粒径为7.4μm的超细铁矿颗粒进行声场流态化实验.结果显示, 聚团尺寸随声压级增大逐渐减小, 在固定声压级的条件下存在最优声波频率, 本实验为130 Hz.由铁矿颗粒声场流态化中聚团受力分析提出聚团受力平衡模型, 当促进聚团破碎的力和促进聚团形成的力相等时, 计算出一定频率不同声压级下的聚团尺寸, 在频率130 Hz、声压120.5 db下, 根据模型计算得到的聚团直径为384μm, 而通过最小流化速度计算值为367μm, 二者较接近. |
|
其他语种文摘
|
Super fine iron ore particles(7.4μm)were fluidized in a 40 mm i.d.fluidized bed with sound excitation. The results showed that the size of agglomerate was decreased with increasing the sound pressure level.At a given sound pressure level, there existed an optimal sound frequency of 130 Hz in this work.A force balance model was developed to predict the agglomerate size through analyzing the forces acting on the agglomerates based on the assumption that the agglomerate will reach a stable size when the detached forces and adherent forces acting on the agglomerate are equal. The agglomerate size is predicted to be 367μm by the model at the sound pressure level of 120.5 db and the sound frequency of 130 Hz, which is in good agreement with the size of 384μm calculated from the minimum fluidized velocity under the same condition. |
|
来源
|
过程工程学报
,2010,10(3):431-437 【核心库】
|
|
关键词
|
声场流化床
;
聚团大小
;
聚团受力平衡模型
;
声压级
|
|
地址
|
中国科学院过程工程研究所, 北京, 100190
|
|
语种
|
中文 |
|
文献类型
|
研究性论文 |
|
ISSN
|
1009-606X |
|
学科
|
化学工业 |
|
基金
|
国家973计划
|
|
文献收藏号
|
CSCD:3912417
|
参考文献 共
23
共2页
|
|
1.
Geldart D. Types of Gas Fluidization.
Powder Technol,1973,7(5):285-292
|
被引
162
次
|
|
|
|
|
2.
Guo Q J. Fluidization of Ultrafine Particles in a Bubbling Fluidized Bed with Sound Assistance.
Chem. Eng. Technol,2005,28(10):1117-1124
|
被引
4
次
|
|
|
|
|
3.
Guo Q J. Fluidization Characteristics of SiO2 Nanoparticles in an Acoustic Fluidized Bed.
Chem. Eng.Technol,2006,29(1):78-86
|
被引
5
次
|
|
|
|
|
4.
Guo Q J. Influence of Sound Wave Characteristics on Fluidization Behaviors of Ultrafine Particles.
Chem. Eng.J,2006,119(1):1-9
|
被引
13
次
|
|
|
|
|
5.
Herrera C A. Bubbling Characteristics of Sound-assisted Fluidized Beds.
Powder Technol,2001,119(2/3):229-240
|
被引
9
次
|
|
|
|
|
6.
Zhu C. Sound Assisted Fluidization of Nanoparticle Agglomerates.
Powder Technol,2004,141(1/2):119-123
|
被引
15
次
|
|
|
|
|
7.
Russo P. The Influence of the Frequency of Acoustic-waves on Sound-assisted Fluidization of Beds of Fine Particles.
Powder Technol,1995,82(3):219-230
|
被引
9
次
|
|
|
|
|
8.
Chirone R. Bubble-free Fluidization of a Cohesive Powder in an Acoustic Field.
Chem. Eng.Sci,1993,48(1):41-52
|
被引
15
次
|
|
|
|
|
9.
Guo Q J. Agglomerate Size in an Acoustic Fluidized Bed with Sound Assistance.
Chem. Eng.Process,2007,46(1):307-313
|
被引
5
次
|
|
|
|
|
10.
王兆霖.
细颗粒的流态化及添加颗粒的作用,1995:42-45
|
被引
1
次
|
|
|
|
|
11.
Wang Z L. Fluidization of Fine Particles.
Chem. Eng.Sci,1998,53(3):377-395
|
被引
12
次
|
|
|
|
|
12.
Herrera C A. Characteristics of Acoustic Standing Waves in Fluidized Beds.
AIChE J,2002,48(3):503-513
|
被引
4
次
|
|
|
|
|
13.
杜功焕.
声学基础,2001:182-184
|
被引
5
次
|
|
|
|
|
14.
杜功焕.
声学基础,2001:461-462
|
被引
2
次
|
|
|
|
|
15.
Zhou T. Estimation of Agglomerate Size for Cohesive Particles during Fluidization.
Powder Technol,1999,101(1):57-62
|
被引
10
次
|
|
|
|
|
16.
Zhou T. Force Balance Modeling for Agglomerating Fluidization of Cohesive Particles.
Powder Technol,2000,111(1/2):60-65
|
被引
8
次
|
|
|
|
|
17.
Iwadate Y. Prediction of Agglomerate Sizes in Bubbling Fluidized Beds of Group C Powders.
Powder Technol,1998,100(2/3):223-236
|
被引
7
次
|
|
|
|
|
18.
Timoshenko S P.
Theory of Elasticity,1970:75-77
|
被引
2
次
|
|
|
|
|
19.
Khan A R. Pressure Gradient and Friction Factor for Sedimentation and Fluidization of Uniform Spheres in Liquid.
Chem. Eng.Sci,1990,45(1):255-265
|
被引
7
次
|
|
|
|
|
20.
Matsuda S. Modeling for Size Reduction of Agglomerates in Nanoparticle Fluidization.
AIChE J,2004,50(11):2763-3771
|
被引
8
次
|
|
|
|
|
了解气象卫星更多信息，请访问