[1] Wang Yinghui, Gui Keting, Shi Mingheng,. Fluidization characteristics of magnetic particles and determinationof stable fluidization zone in magnetically fluidized bed [J]. Journal of Southeast University (English Edition), 2006, 22 (4): 523-527. [doi:10.3969/j.issn.1003-7985.2006.04.017]

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Fluidization characteristics of magnetic particles and determinationof stable fluidization zone in magnetically fluidized bed()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

22

Issue:

2006 4

Page:

523-527

Research Field:

Energy and Power Engineering

Publishing date:

2006-12-30

Info

Title:

Fluidization characteristics of magnetic particles and determinationof stable fluidization zone in magnetically fluidized bed

Author(s):

Wang Yinghui¹;  Gui Keting²;  Shi Mingheng²

¹School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, China
²School of Energy and Environment, Southeast University, Nanjing 210096, China

Keywords:

magnetically fluidized bed;  fluidization characteristics;  stable fluidization;  minimum bubbling gas velocity;  pressure-drop fluctuation

PACS:

TK121

DOI:

10.3969/j.issn.1003-7985.2006.04.017

Abstract:

To determine and calculate the stable fluidization zone in a magnetically fluidized bed, the fluidization characteristics of magnetic particles are investigated.Four kinds of magnetic particles with different average diameters, ranging from 231 to 512 μm, are fluidized in the presence of magnetic fields with specified values of the intensity in the range of zero to 7 330 A/m, and the particle fluidization curves are plotted.For marking the stable fluidization zone in the curves, the minimum bubbling velocities of particles are measured by the pressure-drop fluctuation.Based on the fluidization curves, the influences of the average particle diameter and magnetic field intensity on the zone are analyzed and discussed.A correlation to determine the stable fluidization zone is derived from the experimental data, using three dimensionless numbers, i.e., the ratio of magnetic potential to gravity potential, the Reynolds number and the Archimedes number.Compared with available data reported, it is shown that the correlation is more simplified to predict relative parameters for the bed operating in the state of stable fluidization under reasonable conditions.

References:

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Memo

Memo:

Biographies: Wang Yinghui(1968—), male, doctor, wyh@ujs.edu.cn; Gui Keting(1957—), male, doctor, professor, ktgui@seu.edu.cn.

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