Numerical and experimental thermal analysis of an industrial kiln used for frit production

Possamai, Talita Sauter; Oba, Renato; Nicolau, V.P.

doi:10.1016/j.applthermaleng.2012.05.025

Cited by 18 publications

(12 citation statements)

References 13 publications

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“…This could reduce the furnace walls' refractory capacity. In the same way, the temperature peaks observed with the burner inclination at 7° could generate thermal abrasion on the furnace walls, which reduces the furnace's useful life, thus increasing operating costs [6], [29].…”

Section: 4heat Transfer To the Loadmentioning

confidence: 99%

“…Previously, Possamai et al [6] have carried out numerical and experimental thermal analyses of furnaces for frit production, presenting a methodology to predict the behavior of a frit melting furnace through CFD simulation and the measurement of experimental data. In this study, the researchers observed that the experimental results and the CFD simulation results are coherent since the difference between the CFD simulations and experimental results were insignificant.…”

Section: Introductionmentioning

confidence: 99%

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Effect of burner angle on the heat transfer of a frit furnace

Peláez

Sepúlveda

Múnera

2021

Rev.Fac.Ing.Univ.Antioquia

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In this work, a numerical analysis was performed about the effect of a flat-flame burner incidence degree on the heat transfer of an industrial scale frit melting furnace, which uses a flat-flame natural gas oxy-combustion burner. The thermal performance of the furnace was evaluated by predicting the temperature distributions, the recirculation of the combustion gases, and the heat flow to the load, using three different geometrical configurations, differing in the inclination of the burner at 0°, 3.5°, 7° with respect to the longitudinal axis. The simulations were carried out using the ANSYS® Fluent software. The Steady Laminar Flamelet (SFM) model, the k-epsilon realizable model, and the discrete ordinates model were used to model combustion, turbulence, and radiation, respectively. The weighted model of the sum of gray gases (WSGGM) was used for the coefficient of absorption of the combustion species. It was observed that the furnace temperature estimated with the simulations is similar to that found in the actual process. Additionally, the simulations showed that for the angle of 7°, the flame collides with the frit, which could generate deposition of frit particles in the internal walls of the furnace; this would affect the emissivity of the refractory material. The 3.5degree angle showed a better distribution of heat flow to the frit and recirculation rate compared to the burner at 0° and 7°.

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Section: 4heat Transfer To the Loadmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of burner angle on the heat transfer of a frit furnace

Peláez

Sepúlveda

Múnera

2021

Rev.Fac.Ing.Univ.Antioquia

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“…Cada zona fue descompuesta en una red de reactores que reproduce la hidrodinámica del medio. Más adelante, Possamai et al (2012) simularon un horno de fusión de fritas de gas natural y oxígeno puro como comburente mediante el software CFX. Los resultados mostraron una predicción muy aproximada de la tendencia de la temperatura de la pared externa, identificando puntos calientes que deben evitarse para la operación óptima del horno.…”

Section: Tecno Lógicasunclassified

Simulación Numérica de la Combustión con Aire Enriquecido en un Horno de Fusión de Fritas

Herrera-Múnera

Copete-López

Gutiérrez-Flórez

et al. 2013

TecnoL.

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En este trabajo se presenta un estudio numérico de la combustión con aire enriquecido de un horno rotatorio para la fundición de frita que usa gas natural como combustible, con el fin de determinar una concentración de oxígeno que garantice la viabilidad económica del proceso sin afectar los requerimientos específicos de calidad. Las simulaciones se realizaron utilizando el software comercial ANSYS FLUENT como herramienta de diseño para predecir el comportamiento del sistema térmico y establecer puntos de funcionamiento con diferentes niveles de enriquecimiento del aire. Se empleó el modelo Finite Rate / Eddy Dissipation para la combustión, mientras que los modelos k – ε Realizable y Ordenadas Discretas fueron usados para la simulación del flujo turbulento y la radiación, respectivamente. Los resultados mostraron que un nivel de enriquecimiento cercano al 31% de oxígeno en el aire permite alcanzar las temperaturas de fusión de la frita mayores a 1700 K, logrando así una disminución en los consumos actuales de oxígeno de alta pureza sin afectar la producción y calidad del producto.

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“…Few studies have examined the influence of combustion systems on thermal energy efficiency of the high temperature process where melting is involved. Wang et al [10,11] made a numerical study of the effect of burners on the aluminum melting process using the response surface method. They found that the melting time can be decreased by increasing the swirl component of gas to the burner outlet, increasing the vertical angle of the burner and increasing the air preheating.…”

Section: Introductionmentioning

confidence: 99%

Effect of the combustion system on reduction of thermal specific energy consumption in an industrial high temperature process

Herrera

Rivas²,

Muñoz³

et al. 2021

DYNA

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This paper presents an experimental study carried out in an industrial furnace for frits production using different configurations of burners based on different combustion techniques such as enriched air combustion, flat-flame oxy-combustion and preheater air combustion. The residence time of combustion gases inside the furnace also was modified. Several combustion configurations were tested and its effects on productivity and thermal energy specific consumption and efficiency were determined. The results show that higher residence time of the combustion gases can decrease significantly the specific consumption of fuel, while the change of the burners and combustion techniques did not show significant effects on decreasing the energy consumption. However, it is highlighted that the oxy-combustion flat-flame burners produced the lowest specific consumption of fuel. Even though the experiments were conducted in a furnace for frit production, the corresponding results can also be applied to guide or improve other industrial high temperature processes.

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Numerical and experimental thermal analysis of an industrial kiln used for frit production

Cited by 18 publications

References 13 publications

Effect of burner angle on the heat transfer of a frit furnace

Effect of burner angle on the heat transfer of a frit furnace

Simulación Numérica de la Combustión con Aire Enriquecido en un Horno de Fusión de Fritas

Effect of the combustion system on reduction of thermal specific energy consumption in an industrial high temperature process

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