scholarly journals Analysis of Solids Flow Rate through Nonmechanical L-Valve in an Industrial-Scale Circulating Fluidized Bed Using Group B Particles

2018 ◽  
Vol 57 (33) ◽  
pp. 11439-11451 ◽  
Author(s):  
Esmail R. Monazam ◽  
Ronald W. Breault ◽  
Lawrence J. Shadle ◽  
Justin M. Weber
Keyword(s):  
Fluidized Bed ◽  
Flow Rate ◽  
Circulating Fluidized Bed ◽  
Industrial Scale ◽  
Group B

CFD MODELING OF SO2 CAPTURE USING LIMESTONE IN INDUSTRIAL SCALE CIRCULATING FLUIDIZED BED BOILER

2016 ◽  
Vol 78 (6-4) ◽  
Author(s):  
Rattapong Tritippayanon ◽  
Veeraya Jiradilok ◽  
Pornpote Piumsomboon ◽  
Benjapon Chalermsinsuwan
Keyword(s):  
Particle Size ◽  
Sulfur Dioxide ◽  
Fluidized Bed ◽  
Circulating Fluidized Bed ◽  
Industrial Scale ◽  
Circulating Fluidized Bed Boiler ◽  
Solid Sorbent ◽  
Sulfur Dioxide Concentration ◽  
Upper Secondary ◽  
Secondary Air

The unsteady state computational fluid dynamics model for gas-solid particle flow in industrial scale circulating fluidized bed boiler combining with combustion and desulfurization (using limestone solid sorbent) chemical reactions, both homogeneous and heterogeneous, was developed in this study. The effects of solid sorbent feeding position and solid sorbent particle size on sulfur dioxide concentration were investigated. The results showed that both the solid sorbent feeding position and solid sorbent particle size had an effect on the sulfur dioxide capture. Entering solid sorbent at the upper secondary air position gave lower sulfur dioxide concentration than the one at the lower secondary air position and fuel feed position, respectively. This can be explained by the influence of suitable temperature at the upper secondary air position for desulfurization chemical reaction. About the solid sorbent particle size, the sulfur dioxide capture was the lowest when using the largest solid sorbent particle size due to the system hydrodynamics. 

Modeling on High-Flux Circulating Fluidized Bed with Geldart Group B Particles by Kinetic Theory of Granular Flow

2010 ◽  
Vol 24 (5) ◽  
pp. 3159-3172 ◽  
Author(s):  
Baosheng Jin ◽  
Xiaofang Wang ◽  
Wenqi Zhong ◽  
He Tao ◽  
Bing Ren ◽  
...  
Keyword(s):  
Kinetic Theory ◽  
Fluidized Bed ◽  
Granular Flow ◽  
Circulating Fluidized Bed ◽  
High Flux ◽  
Group B

scholarly journals Removal of Congo Red from Aqueous Solution by Circulating Fluidized Bed(CFB)

2021 ◽  
Vol 28 (2) ◽  
pp. 01-07
Author(s):  
Hamza Q. Ali ◽  
Ahmed A. Mohammed
Keyword(s):  
Mass Transfer ◽  
Fluidized Bed ◽  
Flow Rate ◽  
Congo Red ◽  
Circulating Fluidized Bed ◽  
Mass Transfer Rate ◽  
Breakthrough Curves ◽  
Solution Flow Rate ◽  
Solution Flow ◽  
Bed Height

In this study circulating fluidized bed was adopted to remove of Congo Red from wastewater using Eichhornia crassipes as a adsorbent. Solution flow rate(6,12 and 18)l/hr, bed height(2,4 and 6) cm and Congo Red initaial concentration (10,25 and 50)mg/l were examined in experiments to show their effects on breakthrough curves and time required to reach the adsorbent to fully saturated curve. The mass transfer coefficient "KL"decreased with decreasing the liquid flow rate. The minimum fluidization velocities of bed found equal to 1.6, 2, 2.5 mm/s for heights of 2, 4,6 cm respectively. The increasing of the bed height will increase the contact time of the solute in the bed, and these improve the solute removal efficiency. the increasing in flow rate and initial concentration will increase the mass transfer rate.

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