Extending homogeneous fluidization flow regime of Geldart-A particles by exerting axial uniform and steady magnetic field
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Extending homogeneous fluidization flow regime of Geldart-A particles by exerting axial uniform and steady magnetic field
Chinese Journal of Chemical EngineeringVol. 65, Issue 1, Pages: 169-177(2024)
Affiliations:
1. College of Chemical Engineering, Qingdao University of Science and Technology,Qingdao,China,266042
2. School of Chemical & Environmental Engineering, China University of Mining & Technology-, Beijing,Beijing,China,100083
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Published:2024
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Qiang Zhang, Wankun Liu, Hengjun Gai, Quanhong Zhu. Extending homogeneous fluidization flow regime of Geldart-A particles by exerting axial uniform and steady magnetic field[J]. Chinese Journal of Chemical Engineering, 2024, 65(1): 169-177.
DOI:
Qiang Zhang, Wankun Liu, Hengjun Gai, Quanhong Zhu. Extending homogeneous fluidization flow regime of Geldart-A particles by exerting axial uniform and steady magnetic field[J]. Chinese Journal of Chemical Engineering, 2024, 65(1): 169-177.DOI:
Extending homogeneous fluidization flow regime of Geldart-A particles by exerting axial uniform and steady magnetic field
摘要
Abstract
The homogeneous/particulate fluidization flow regime is particularly suitable for handling the various gas-solid contact processes encountered in the chemical and energy industry. This work aimed to extend such a regime of Geldart-A particles by exerting the axial uniform and steady magnetic field. Under the action of the magnetic field
the overall homogeneous fluidization regime of Geldart-A magnetizable particles became composed of two parts:inherent homogeneous fluidization and newly-created magnetic stabilization. Since the former remained almost unchanged whereas the latter became broader as the magnetic field intensity increased
the overall homogeneous fluidization regime could be extended remarkably. As for Geldart-A nonmagnetizable particles
certain amount of magnetizable particles had to be premixed to transmit the magnetic stabilization. Among others
the mere addition of magnetizable particles could broaden the homogeneous fluidization regime. The added content of magnetizable particles had an optimal value with smaller/lighter ones working better. The added magnetizable particles might raise the ratio between the interparticle force and the particle gravity. After the magnetic field was exerted
the homogeneous fluidization regime was further expanded due to the formation of magnetic stabilization flow regime. The more the added magnetizable particles
the better the magnetic performance and the broader the overall homogeneous fluidization regime. Smaller/lighter magnetizable particles were preferred to maximize the magnetic performance and extend the overall homogeneous fluidization regime. This phenomenon could be ascribed to that the added magnetizable particles themselves became more Geldart-A than -B type as their density or size decreased.
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