Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
PULVERIZED COAL UTILITY BOILER CFD MODELING OF A 360 MW POWER PLANT OPERATING WITH FAULTY OVER-FIRE AIR
Submission Author:
Paulo Rodolfo Buffon Ortiz , RS
Co-Authors:
Paulo Rodolfo Buffon Ortiz, Raul Vanz, Paulo Smith Schneider, Cristiano Vitorino da Silva
Presenter: Paulo Rodolfo Buffon Ortiz
doi://10.26678/ABCM.COBEM2019.COB2019-0560
Abstract
This work presents a numerical modeling applied on the real-scale geometry of a 360 MW steam generator to predict the behavior of coal combustion during an OFA maintenance. An Eulerian modeling of conservation equations of mass, momentum, energy and chemical species as well as the turbulence. For coal transportation and ash particles a Lagrangian modeling coupled with gas-phase was used. The objective is to develop a computational model capable of predict the behavior of reactive, turbulent and non-isothermal multiphase flow of a real-scale steam generator in order to investigate the influence of the OFA faulty operation. The results show that the reactive flow is bent towards the frontal wall, it implies an increased heat transfer on the water walls causing operation risks. Besides that, since the reaction implied by the burners is sub stoichiometric unburned combustion gases and coal particles remains in the flue gases, causing several hazards and efficiency loss.
Keywords
CFD simulation, coal combustion, Boiler, Turbulence Model
