Characteristics of Pressure Fluctuations in a Fluidized Bed of Binary Mixtures

Local instantaneous pressure signals obtained through a magneto-fluidized bed have been analyzed using both classical and advanced signal analysis methods, which can deliver the necessary information about the presence of the bubbling and turbulent flow pattern. The conventional signal processing tool such as autocorrelation and cross correlation were used as preliminary tools to analyze the data. Evaluation of the dominant bubble frequency was completed using the autocorrelation function and power spectral density function. Mutual information function was used to identify the periodicity and the predictability of the local instantaneous pressure signals. Since it does not demand any particular functional relationships between the data points, it is a better method (compared to autocorrelation function) for measuring the predictability of nonlinear systems.

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Characterization of pressure fluctuations from a gas–solid fluidized bed by structure density function analysis

Chemical Engineering Science ◽

10.1016/j.ces.2015.02.009 ◽

2015 ◽

Vol 129 ◽

pp. 156-167 ◽

Cited By ~ 18

Author(s):

Yumin Chen ◽

C. Jim Lim ◽

John R. Grace ◽

Junying Zhang ◽

Yongchun Zhao ◽

...

Keyword(s):

Density Function ◽

Fluidized Bed ◽

Function Analysis ◽

Pressure Fluctuations ◽

Structure Density

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Mixing and segregation behavior in an air dense medium fluidized bed with binary mixtures for dry coal beneficiation

Powder Technology ◽

10.1016/j.powtec.2020.05.094 ◽

2020 ◽

Vol 371 ◽

pp. 161-169 ◽

Cited By ~ 2

Author(s):

Zhijie Fu ◽

Jesse Zhu ◽

Shahzad Barghi ◽

Yuemin Zhao ◽

Zhenfu Luo ◽

...

Keyword(s):

Fluidized Bed ◽

Binary Mixtures ◽

Dense Medium ◽

Segregation Behavior ◽

Coal Beneficiation

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Pressure fluctuations in a gas-solid fluidized bed with a screen

Industrial & Engineering Chemistry Process Design and Development ◽

10.1021/i200032a046 ◽

1986 ◽

Vol 25 (1) ◽

pp. 284-289 ◽

Cited By ~ 3

Author(s):

Y. W. Huang ◽

L. T. Fan ◽

J. C. Song ◽

N. Yutani

Keyword(s):

Fluidized Bed ◽

Pressure Fluctuations

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Detection of gas-solid flow faults of a circulating fluidized bed using pressure fluctuations in wind caps

Korean Journal of Chemical Engineering ◽

10.1007/s11814-016-0046-1 ◽

2016 ◽

Vol 33 (7) ◽

pp. 2240-2251 ◽

Cited By ~ 3

Author(s):

Hua-wei Jiang ◽

Jian-qiang Gao ◽

Hong-wei Che ◽

Jun-fu Lu ◽

Fu-mao Wang ◽

...

Keyword(s):

Fluidized Bed ◽

Circulating Fluidized Bed ◽

Pressure Fluctuations ◽

Solid Flow

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Mixing Characteristics of Binary Mixture with Biomass in a Gas-Solid Rectangular Fluidized Bed

Energies ◽

10.3390/en12102011 ◽

2019 ◽

Vol 12 (10) ◽

pp. 2011

Author(s):

Guiying Wu ◽

Bangting Yu ◽

Yanjun Guan ◽

Xuehui Wu ◽

Kai Zhang ◽

...

Keyword(s):

Binary Mixture ◽

Fluidized Bed ◽

Binary Mixtures ◽

Silica Sand ◽

Mixture Composition ◽

Inert Material ◽

Gas Velocity ◽

Mixing Characteristics ◽

Superficial Gas Velocity ◽

Initial Packing

Aiming to better understand the biomass pyrolysis and gasification processes, a detailed experimental study of the mixing characteristics is conducted in a fluidized bed with binary mixtures. Rapeseed is used as biomass, and silica sand or resin as inert material. The effect of mixture composition, initial packing manner, and superficial gas velocity on the concentration distribution is investigated in a rectangular fluidized bed by means of photography and sampling methods. The results show that the mixture composition plays an important role in the axial solids profile of binary mixtures. The mixing behavior of binary mixture is dominated by the bubble movement. The axial distribution of binary mixtures becomes uniform with increasing superficial gas velocity, whilst no obvious effect of initial packing manner is observed in this study.

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