Title:
Modeling of Porous Media in a Reciprocating Grate Furnace of a 3MW Boiler Burning Eucalyptus Chips
Author(s):
Sousa, M.A., Cancino, L.R., Bazzo, E.
Document(s):
Paper
Abstract:
Reciprocating grate furnaces are widely used for burning solid fuels, including forest residues, wood chips, and sugarcane bagasse, among others. However, these grates are subjected to high oven temperatures, abrasion caused by the fuel, and corrosive substances produced during combustion, which can increase maintenance costs and decrease efficiency, as well as have negative environmental impacts. To address these challenges, recent studies have aimed at improving grate design and performance. In this work, we present a CRFD (Computational Reactive Fluid Dynamics) simulation of the grate and fuel bed as porous domains. The simulation was carried out using ANSYS-FLUENT, and the results show good agreement with the real geometry in terms of pressure and velocity. Our model provides valuable insights into the combustion reactions and the pressure drop generated by the grate inside the furnace, which can help to optimize the design and operation of these furnaces. The average furnace temperature obtained from the simulation is around 1000 °C, consistent with results reported by the boiler manufacturer.
Keywords:
biomass combustion, moving bed furnace, reciprocating grates, CRFD simulation
Topic:
Biomass Conversion for Bioenergy
Subtopic:
Advanced biomass combustion
Event:
31st European Biomass Conference and Exhibition
Session:
4CV.3.16
Pages:
735 - 744
ISBN:
978-88-89407-23-3
Paper DOI:
10.5071/31stEUBCE2023-4CV.3.16
Price:
FREE
