Daniel J. O. Ferreira and Juan H. Sosa-Arnao and Bruno C. Moreira and Leonardo P. Rangel and Song W. Park
A Comprehensive CFD Model for SugarCane Bagasse Heterogeneous Combustion in a Grate Boiler System
593 - 600
2015
9
5
International Journal of Chemical and Molecular Engineering
https://publications.waset.org/pdf/10001615
https://publications.waset.org/vol/101
World Academy of Science, Engineering and Technology
The comprehensive CFD models have been used to
represent and study the heterogeneous combustion of biomass. In the
present work, the operation of a global flue gas circuit in the sugarcane
bagasse combustion, from wind boxes below primary air grate
supply, passing by bagasse insertion in swirl burners and boiler
furnace, to boiler bank outlet is simulated. It uses five different
meshes representing each part of this system located in sequence
wind boxes and grate, boiler furnace, swirl burners, superheaters and
boiler bank. The model considers turbulence using standard kε,
combustion using EDM, radiation heat transfer using DTM with 16
ray directions and bagasse particle tracking represented by Schiller
Naumann model. The results showed good agreement with expected
behavior found in literature and equipment design. The more detailed
results view in separated parts of flue gas system allows observing
some flow behaviors that cannot be represented by usual
simplifications like bagasse supply under homogeneous axial and
rotational vectors and others that can be represented using new
considerations like the representation of 26 thousand grate orifices by
144 rectangular inlets.
Open Science Index 101, 2015