CFD analysis of the temperature profile in a petroleum atmospheric distillation furnace chamber
Peterson Machado de Oliveira1; Cristiano Vitorino da Silva2; Flavia Zinani1
1 Universidade do Vale do Rio dos Sinos; 2 URI Erechim
doi:10.20906/CPS/CILAMCE2017-0774
Resumo
This work presents tridimensional numerical simulations of refinery gas combustion in the chamber of an atmospheric furnace in a petroleum distillation unit. The objective of the analysis is to verify the effects of furnace and burner geometry on the temperature profile of the oil heating coil tubes. These characteristics affect how heat is transferred from flame radiation and from convective heat fluxes from the gas flow. We employ a computational fluid dynamics (CFD) model based on the solution of mass, momentum and chemical species conservations equations. Thermal radiation exchanges in the combustion chamber are computed through the Discrete Transfer Radiation Model (DTRM), and the heat exchange between the zones of radiation and convection of the furnace and the surface of the tubes was determined through a study of the operation of a furnace in operation in the city of Canoas - Brazil using HTRI software for simulation of refining processes. The turbulence is modeled by the standard model, and the chemical reactions by a two-step reaction mechanism along with the combined Eddy-Break-Up - Arrhenius model. The numerical results are compared with experimental measurements in order to validate the model. It is expected that the validated model can be used to simulate furnaces operating in similar regimes, regardless of the geometry and fuel composition.
Palavras-chave: Refinary Furnaces; Heat Exchanger; Combustion modeling