The Influence of Swirl Burner Geometry on the Sugar-Cane Bagasse Injection and Burning

A comprehensive CFD model is developed to represent heterogeneous combustion and two burner designs of supply sugar-cane bagasse into a furnace. The objective of this work is to compare the insertion and burning of a Brazilian south-eastern sugar-cane bagasse using a new swirl burner design against an actual geometry under operation. The new design allows control the particles penetration and scattering inside furnace by adjustment of axial/tangential contributions of air feed without change their mass flow. The model considers turbulence using RNG k-, combustion using EDM, radiation heat transfer using DTM with 16 ray directions and bagasse particle tracking represented by Schiller-Naumann model. The obtained results are favorable to use of new design swirl burner because its axial/tangential control promotes more penetration or more scattering than actual design and allows reproduce the actual design operation without change the overall mass flow supply.

Authors:

• Juan H. Sosa-Arnao
• Daniel J. O. Ferreira
• Caice G. Santos
• Justo E. Alvarez
• Leonardo P. Rangel
• Song W. Park

Keywords:

• Comprehensive CFD model
• sugar-cane bagasse combustion
• swirl burner.

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