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ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
VALIDATION OF A ONE-DIMENSIONAL NUMERICAL MODEL TO PREDICT SOLID FUEL COMBUSTION IN A DROP TUBE FURNACE
Submission Author:
Juliana Pohlmann , RS
Co-Authors:
Juliana Pohlmann, Vítor Lumertz, Roberto Coelho Andriotti, Daniela Mortari, MATHEUS BRUNE, Thamy Cristina Hayashi, Paulo Smith Schneider, Fernando Pereira
Presenter: Juliana Pohlmann
doi://10.26678/ABCM.ENCIT2020.CIT20-0561
Abstract
This work is part of a validation of a one-dimensional numerical model based on the literature and implemented in order to complement experimental studies on coal and biomass combustion in a Drop Tube Furnace recently constructed at the Combustion Laboratory of the Federal University of Rio Grande do Sul. Experimental tests were conducted for pulverized fuels with known particle size distribution and burnout was calculated using the ash-tracer method. The numerical model used as basis of this work simulates the evolution of combustion for size-ranged particle classes and estimates, besides typical combustion parameters, as burnout, partial pressure of oxygen, and chars characteristics, optimized kinetic parameters for devolatilization and heterogeneous combustion of char. Particle size distribution of fuels and of their chars were employed as input data and revealed the best fit related to the combustion regime, which was used for burnout data fitting. A good fit of the experimental and numerical data was observed for burnout at different wall temperature and axial distance along DTF and satisfactory kinetic parameters were found in this work, indicating that this approach could be suitable for application to typical fuels currently used in industrial processes.
Keywords
coal combustgion, Biomass combustion, Kinetic parameters, Drop tube furnace, Numerical Modeling
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