Influence of burner nozzle configuration, and inlet gas composition on combustion, gas dynamics, temperature and concentration profile in a rotary hearth furnace

A CDF model for simulating gas dynamics, heat and mass transfer in the freeboard of a pilot-scale Rotary Hearth Furnace (RHF) is developed in conjunction with an independent solid reduction model at the bottom of the hearth. The effect of air-inlet configuration and inlet fuel composition on the fue...

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Published inIronmaking & steelmaking Vol. 48; no. 3; pp. 229 - 241
Main Authors Saleem, Sooraj, Roy, Gour Gopal
Format Journal Article
LanguageEnglish
Published London, England Taylor & Francis 16.03.2021
SAGE Publications
Subjects
burner configuration
combustion
DRI
emission
fuel gas composition
gas dynamics
Reduction Kinetics
Rotary hearth furnace
combustion
burner configuration
fuel gas composition
gas dynamics
DRI
Rotary hearth furnace
CO2 emission
Reduction Kinetics
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Abstract A CDF model for simulating gas dynamics, heat and mass transfer in the freeboard of a pilot-scale Rotary Hearth Furnace (RHF) is developed in conjunction with an independent solid reduction model at the bottom of the hearth. The effect of air-inlet configuration and inlet fuel composition on the fuel requirement, exit gas composition, fluid flow, temperature, and gaseous composition distribution have been investigated using this model. The lower air-inlet tubes orientated at 5° upwards keeping remaining air and fuel tubes horizontal emerged as the most recommended burner configuration. Various alternative fuels categorized in terms of calorific values, demonstrated that the fuel with high calorific value required less fuel and produced less CO 2 emission. Interestingly, it was found that for the same calorific value a combination of blast furnace gas and coke oven gas (BF+COG) produced less CO 2 emission compared to a combination of COG+BF+NG (Natural gas).
AbstractList A CDF model for simulating gas dynamics, heat and mass transfer in the freeboard of a pilot-scale Rotary Hearth Furnace (RHF) is developed in conjunction with an independent solid reduction model at the bottom of the hearth. The effect of air-inlet configuration and inlet fuel composition on the fuel requirement, exit gas composition, fluid flow, temperature, and gaseous composition distribution have been investigated using this model. The lower air-inlet tubes orientated at 5° upwards keeping remaining air and fuel tubes horizontal emerged as the most recommended burner configuration. Various alternative fuels categorized in terms of calorific values, demonstrated that the fuel with high calorific value required less fuel and produced less CO2 emission. Interestingly, it was found that for the same calorific value a combination of blast furnace gas and coke oven gas (BF+COG) produced less CO2 emission compared to a combination of COG+BF+NG (Natural gas).
A CDF model for simulating gas dynamics, heat and mass transfer in the freeboard of a pilot-scale Rotary Hearth Furnace (RHF) is developed in conjunction with an independent solid reduction model at the bottom of the hearth. The effect of air-inlet configuration and inlet fuel composition on the fuel requirement, exit gas composition, fluid flow, temperature, and gaseous composition distribution have been investigated using this model. The lower air-inlet tubes orientated at 5° upwards keeping remaining air and fuel tubes horizontal emerged as the most recommended burner configuration. Various alternative fuels categorized in terms of calorific values, demonstrated that the fuel with high calorific value required less fuel and produced less CO 2 emission. Interestingly, it was found that for the same calorific value a combination of blast furnace gas and coke oven gas (BF+COG) produced less CO 2 emission compared to a combination of COG+BF+NG (Natural gas).
Author Roy, Gour Gopal
Saleem, Sooraj
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Cites_doi 10.1007/BF02913373
10.1007/s11663-020-01778-z
10.1007/s11367-015-0904-9
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10.2355/isijinternational.39.130
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Keywords combustion
burner configuration
fuel gas composition
gas dynamics
DRI
Rotary hearth furnace
CO2 emission
Reduction Kinetics
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SubjectTerms burner configuration
combustion
DRI
emission
fuel gas composition
gas dynamics
Reduction Kinetics
Rotary hearth furnace
Title Influence of burner nozzle configuration, and inlet gas composition on combustion, gas dynamics, temperature and concentration profile in a rotary hearth furnace
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