The nitric oxide formation in anode baking furnace through numerical modeling

Thermal nitric-oxide (NOx) formation in industrial furnaces due to local overheating is a widely known problem. Various industries made significant investments to reduce thermal NOx by varying the operating conditions and designs of the furnace. It is difficult to find the optimal operating conditio...

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Autores principales:	Prajakta Nakate, Domenico Lahaye, Cornelis Vuik
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Thermal NOx formation Industrial furnace Diffusion tuning Eddy dissipation model P1 approximation model Heat QC251-338.5
Acceso en línea:	https://doaj.org/article/3c975784641449b3a1d172fe71a88e2b
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spelling	oai:doaj.org-article:3c975784641449b3a1d172fe71a88e2b2021-11-28T04:38:31ZThe nitric oxide formation in anode baking furnace through numerical modeling2666-202710.1016/j.ijft.2021.100122https://doaj.org/article/3c975784641449b3a1d172fe71a88e2b2021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2666202721000598https://doaj.org/toc/2666-2027Thermal nitric-oxide (NOx) formation in industrial furnaces due to local overheating is a widely known problem. Various industries made significant investments to reduce thermal NOx by varying the operating conditions and designs of the furnace. It is difficult to find the optimal operating conditions that minimize NOx formation in the furnace by trial and error methods. The high temperature in the furnace complicates performing experiments in the furnace. Numerical modeling can provide significant information in such cases. Therefore, the objective of this paper is to obtain a numerical model of the furnace in such a way that the operating conditions can be varied and examined.In this paper, a three-dimensional steady-state finite element model for the anode baking industrial furnace is discussed. The COMSOL Multiphysics software is used for modeling the non-premixed turbulent combustion and the conjugate heat transfer to the insulation lining. The cfMesh software is used for obtaining the mesh. The results show that the simulated temperature agrees well with the measured data from our industrial partner in regions distant from the flames. The analysis shows that by decreasing the fuel mass flow rate and increasing the fuel pipe diameter by 45%, the peak in thermal NOx ppm generated in the furnace decreases by 42%. The model is limited by the use of a single-step chemistry mechanism with an eddy dissipation combustion model and a simplified approach for radiation, such as the P1 approximation model. The model can be further improved by considering a detailed chemistry mechanism model for combustion and a discrete ordinate model for radiation.Prajakta NakateDomenico LahayeCornelis VuikElsevierarticleThermal NOx formationIndustrial furnaceDiffusion tuningEddy dissipation modelP1 approximation modelHeatQC251-338.5ENInternational Journal of Thermofluids, Vol 12, Iss , Pp 100122- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Thermal NOx formation Industrial furnace Diffusion tuning Eddy dissipation model P1 approximation model Heat QC251-338.5
spellingShingle	Thermal NOx formation Industrial furnace Diffusion tuning Eddy dissipation model P1 approximation model Heat QC251-338.5 Prajakta Nakate Domenico Lahaye Cornelis Vuik The nitric oxide formation in anode baking furnace through numerical modeling
description	Thermal nitric-oxide (NOx) formation in industrial furnaces due to local overheating is a widely known problem. Various industries made significant investments to reduce thermal NOx by varying the operating conditions and designs of the furnace. It is difficult to find the optimal operating conditions that minimize NOx formation in the furnace by trial and error methods. The high temperature in the furnace complicates performing experiments in the furnace. Numerical modeling can provide significant information in such cases. Therefore, the objective of this paper is to obtain a numerical model of the furnace in such a way that the operating conditions can be varied and examined.In this paper, a three-dimensional steady-state finite element model for the anode baking industrial furnace is discussed. The COMSOL Multiphysics software is used for modeling the non-premixed turbulent combustion and the conjugate heat transfer to the insulation lining. The cfMesh software is used for obtaining the mesh. The results show that the simulated temperature agrees well with the measured data from our industrial partner in regions distant from the flames. The analysis shows that by decreasing the fuel mass flow rate and increasing the fuel pipe diameter by 45%, the peak in thermal NOx ppm generated in the furnace decreases by 42%. The model is limited by the use of a single-step chemistry mechanism with an eddy dissipation combustion model and a simplified approach for radiation, such as the P1 approximation model. The model can be further improved by considering a detailed chemistry mechanism model for combustion and a discrete ordinate model for radiation.
format	article
author	Prajakta Nakate Domenico Lahaye Cornelis Vuik
author_facet	Prajakta Nakate Domenico Lahaye Cornelis Vuik
author_sort	Prajakta Nakate
title	The nitric oxide formation in anode baking furnace through numerical modeling
title_short	The nitric oxide formation in anode baking furnace through numerical modeling
title_full	The nitric oxide formation in anode baking furnace through numerical modeling
title_fullStr	The nitric oxide formation in anode baking furnace through numerical modeling
title_full_unstemmed	The nitric oxide formation in anode baking furnace through numerical modeling
title_sort	nitric oxide formation in anode baking furnace through numerical modeling
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/3c975784641449b3a1d172fe71a88e2b
work_keys_str_mv	AT prajaktanakate thenitricoxideformationinanodebakingfurnacethroughnumericalmodeling AT domenicolahaye thenitricoxideformationinanodebakingfurnacethroughnumericalmodeling AT cornelisvuik thenitricoxideformationinanodebakingfurnacethroughnumericalmodeling AT prajaktanakate nitricoxideformationinanodebakingfurnacethroughnumericalmodeling AT domenicolahaye nitricoxideformationinanodebakingfurnacethroughnumericalmodeling AT cornelisvuik nitricoxideformationinanodebakingfurnacethroughnumericalmodeling
_version_	1718408253514186752

The nitric oxide formation in anode baking furnace through numerical modeling

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