scholarly journals Kinetic Study of Sulfur Dioxide Elimination by Limestone through the Lab Scale Circulating Fluidized Bed Combustor

2012 ◽  
Vol 02 (04) ◽  
pp. 189-192 ◽  
Author(s):  
Dowon Shun ◽  
Dal-Hee Bae ◽  
In-Kyu Jang ◽  
Keon-Hee Park ◽  
Seung Kyu Park
Keyword(s):  
Sulfur Dioxide ◽  
Kinetic Study ◽  
Fluidized Bed ◽  
Circulating Fluidized Bed ◽  
Fluidized Bed Combustor

scholarly journals Sulfur Dioxide Capture by Limestone in a Lab Scale Circulating Fluidized Bed Combustor

2013 ◽  
Vol 25 (10) ◽  
pp. 5593-5595
Author(s):  
Dowon Shun ◽  
Dal-Hee Bae ◽  
Changsup Oh ◽  
Heon Chang Kim ◽  
Seung Kyu Park
Keyword(s):  
Sulfur Dioxide ◽  
Fluidized Bed ◽  
Circulating Fluidized Bed ◽  
Fluidized Bed Combustor

Effect of sulfur dioxide removal by limestone on nitrogen oxide (NOx) and nitrous oxide emissions from a circulating fluidized bed combustor

1992 ◽  
Vol 6 (6) ◽  
pp. 753-757 ◽  
Author(s):  
Tadaaki Shimizu ◽  
Yutaka Tachiyama ◽  
Daisuke Fujita ◽  
Kenichi Kumazawa ◽  
Osamu Wakayama ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Sulfur Dioxide ◽  
Nitrogen Oxide ◽  
Fluidized Bed ◽  
Circulating Fluidized Bed ◽  
Nitrous Oxide Emissions ◽  
Sulfur Dioxide Removal ◽  
Fluidized Bed Combustor

Numerical analysis of particle clustering effects on desulphurization and NO emission in a circulating fluidized bed combustor

Fuel ◽  
2008 ◽  
Vol 87 (6) ◽  
pp. 870-877 ◽  
Author(s):  
Wang Shuyan ◽  
Yin Lijie ◽  
Lu Huilin ◽  
Jianmin Ding ◽  
Long Yu ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Fluidized Bed ◽  
Circulating Fluidized Bed ◽  
No Emission ◽  
Particle Clustering ◽  
Fluidized Bed Combustor

Modelling Fuel and Sorbent Attrition During Circulating Fluidized Bed Combustion of Coal

2003 ◽  
Author(s):  
D. Barletta ◽  
A. Marzocchella ◽  
P. Salatino ◽  
S. G. Kang ◽  
P. T. Stromberg
Keyword(s):  
Fluidized Bed ◽  
Circulating Fluidized Bed ◽  
Surface Wear ◽  
Fluidized Bed Combustion ◽  
Coal Fuel ◽  
Primary Fragmentation ◽  
The Impact ◽  
Constitutive Parameters ◽  
Fluidized Bed Combustor ◽  
Circulating Fluidized Bed Combustion

A simulation model of a circulating fluidized bed combustor, based on a one-dimensional description of bed hydrodynamics and a simplified formulation of the population balance equation on fuel and bed solids, has been set up. The model specifically aims at assessing the extent of fuel and sorbent attrition during circulating fluidized bed combustion of coal. Fuel attrition is modelled as a function of carbon loading and of the relevant operating variables while taking into account primary fragmentation of coal and secondary fragmentation and attrition by surface wear of its char. Modelling of sorbent attrition accounts for primary fragmentation of limestone upon calcination as well as attrition by surface wear of lime. To this end time- and conversion-dependent attrition rate is averaged over the sorbent particle lifetime in the reactor. Attrition submodels and their constitutive parameters are based on previous work by the research group in Naples. Coal char combustion and lime sulphation are modelled considering intrinsic reaction kinetics as well as boundary layer and intraparticle diffusion of reactants. The impact of attrition phenomena on the performance of the fluidized bed combustor is characterized by looking at carbon combustion efficiency, at sulphur capture efficiency, at the balance between bottom and fly ashes. The influence of operating parameters like fuel particle size, Ca/S ratio, gas superficial velocity, extent of air staging is investigated. The sensitivity of results of model computations to the parameters expressing fuel and sorbent attrition is presented and discussed.

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. 

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