Observed Mixing Behavior of Single Particles in a Bubbling Fluidized Bed of Higher-Density Particles

2012 ◽  
Vol 51 (44) ◽  
pp. 14566-14576 ◽  
Author(s):  
Jack Halow ◽  
Kerri Holsopple ◽  
Benjamin Crawshaw ◽  
Stuart Daw ◽  
Charles Finney
Keyword(s):  
Fluidized Bed ◽  
Single Particles ◽  
Mixing Behavior ◽  
Bubbling Fluidized Bed

scholarly journals Particle-Scale Simulation of Solid Mixing Characteristics of Binary Particles in a Bubbling Fluidized Bed

Energies ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 4442 ◽  
Author(s):  
Junjie Lin ◽  
Kun Luo ◽  
Shuai Wang ◽  
Liyan Sun ◽  
Jianren Fan
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Fluidized Bed ◽  
Critical Velocity ◽  
Superficial Velocity ◽  
Mixing Index ◽  
Mixing Behavior ◽  
Mixing Characteristics ◽  
Bubbling Fluidized Bed

The behavior of solid mixing dynamic is of profound significance to the heat transfer and reaction efficiencies in energy engineering. In the current study, the solid mixing characteristics of binary particles in the bubbling fluidized bed are further revealed at particle-scale. Specifically, the influences of gas superficial velocity, Sauter mean diameter (SMD) in the system and the range distribution of particle sizes on the performance of mixing index are quantitatively explored using a computational fluid dynamics-discrete element method (CFD-DEM) coupling model. The competition between solid segregation and the mixing of binary particles is deeply analyzed. There is a critical superficial velocity that maximizes the mixing index of the binary mixture in the bubbling fluidized bed. Solid mixing performs more aggressive when below the critical velocity, otherwise solid segregation overtakes mixing when above this critical velocity. Moreover, superficial velocity is a major factor affecting the mixing efficiency in the binary bubbling fluidized bed. Additionally, the mixing behavior is enhanced with the decrease of SMD while it is deteriorated in the binary system with a wide range of particle size distribution. Therefore, it is highly recommended to perform a binary particle system with smaller SMD and closer particle size distribution for the purpose of enhancing the mixing behavior. The significant understanding of mixing characteristics is expected to provide valuable references for the design, operation, and scale-up of binary bubbling fluidized bed.

NITRIC OXIDE EMISSION MODELING IN A BUBBLING FLUIDIZED BED FURNACE FOR BIOMASS

Clean Air ◽  
2006 ◽  
Vol 7 (2) ◽  
pp. 105-126
Author(s):  
A. Saario ◽  
A. Oksanen ◽  
M. Ylitalo
Keyword(s):  
Nitric Oxide ◽  
Fluidized Bed ◽  
Nitric Oxide Emission ◽  
Bubbling Fluidized Bed ◽  
Emission Modeling

Tar formation during eucalyptus gasification in a bubbling fluidized bed reactor: Effect of feedstock and reactor bed composition

2021 ◽  
Vol 229 ◽  
pp. 113749
Author(s):  
D.T. Pio ◽  
L.C.M. Ruivo ◽  
L.A.C. Tarelho ◽  
J.R. Frade ◽  
E. Kantarelis ◽  
...  
Keyword(s):  
Fluidized Bed ◽  
Fluidized Bed Reactor ◽  
Bubbling Fluidized Bed

Simulation of biomass gasification in bubbling fluidized bed reactor using aspen plus®

2021 ◽  
Vol 235 ◽  
pp. 113981
Author(s):  
M. Puig-Gamero ◽  
D.T. Pio ◽  
L.A.C. Tarelho ◽  
P. Sánchez ◽  
L. Sanchez-Silva
Keyword(s):  
Fluidized Bed ◽  
Aspen Plus ◽  
Fluidized Bed Reactor ◽  
Biomass Gasification ◽  
Bubbling Fluidized Bed

Statistical study of the distribution of voidage in a bubbling fluidized bed with a constant section

2021 ◽  
Author(s):  
Shijie Yu ◽  
Xiaoxiao Yang ◽  
Jie Xiang ◽  
Qinghai Li ◽  
Hui Zhou ◽  
...  
Keyword(s):  
Fluidized Bed ◽  
Statistical Study ◽  
Bubbling Fluidized Bed ◽  
Constant Section
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