Eventos Anais de eventos
ENCIT 2022
19th Brazilian Congress of Thermal Sciences and Engineering
Thermal simulation of a furnace for production of frits and comparison of costs using air and pure oxygen
Submission Author:
Edemar Morsch Filho , SP
Co-Authors:
Edemar Morsch Filho, Vicente de Paulo Nicolau
Presenter: Edemar Morsch Filho
doi://10.26678/ABCM.ENCIT2022.CIT22-0651
Abstract
This study is initially about the numerical simulation of an operational furnace from the industry to producing ceramic frits. The software Ansys CFX solves the main phenomena found in the heat transfer and combustion in the furnace. Four chimney positions are tested to evaluate the furnace’s performance. Natural gas and pure oxygen are used for combustion. The results from the current furnace’s configuration are validated with experimental values. Numerical results indicate that the chimney’s positions do not strongly influence the energy distribution. An analytical study involving hypothetical combustion with air is conducted and compared to the current oxy-combustion. In this case, it was considered that the energy consumed by material in the furnace should be the actual value (606 kW) to result in a similar performance. With unheated air, a natural gas flow rate of 2.43 times the current value will provide the performance with pure oxygen. In this case, 70% of the energy goes out with the flue gas; therefore, it has a high potential to preheat the air. When analyzing the combustion costs with pre-heated air, they can be significantly lower than the oxy-combustion.
Keywords
Heat transfer, oxy-combustion, thermal simulation, frits production, ceramic kiln
