Numerical simulation of coal oxidation reaction in coal oxidation furnace based on COMSOL

GUO Tianning; ZENG Qiang

doi:10.19835/j.issn.1008-4495.2023.01.002

Mining Safety & Environmental Protection > 2023 > 50(1): 9-13. > DOI: 10.19835/j.issn.1008-4495.2023.01.002

GUO Tianning, ZENG Qiang. Numerical simulation of coal oxidation reaction in coal oxidation furnace based on COMSOL[J]. Mining Safety & Environmental Protection, 2023, 50(1): 9-13. DOI: 10.19835/j.issn.1008-4495.2023.01.002

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Numerical simulation of coal oxidation reaction in coal oxidation furnace based on COMSOL

GUO Tianning^{1, 2, 3,},
ZENG Qiang^{1, 2, 3, ,}

1.
School of Ecology and Environment, Xinjiang University, Urumqi 830046, China
2.
Institute of Arid Ecological Environment, Xinjiang University, Urumqi 830046, China
3.
Key Laboratory of Aasis Ecology, Ministry of Education, Xinjiang University, Urumqi 830046, China

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Received Date: November 09, 2021
Revised Date: October 30, 2022
Available Online: March 08, 2023

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Abstract

Abstract

In order to explore the distribution law of temperature, oxidation products and reactants in the process of coal combustion. In this paper, the model of coal oxidation furnace was established by COMSOL 5.5 numerical simulation software. Based on the coal attribute data of Zhundong Coal Mine in Xinjiang Province, the distribution characteristics of temperature, O ₂ and concentration of oxidation products (CO and CO ₂) in furnace under natural heating and heating and different pressure difference conditions were simulated. The results show that with the increase of pressure difference, the temperature in furnace and the concentration of oxidation products decrease, and the position of high temperature region at the end of reaction increases. Under the same pressure difference, the concentration of oxidation products increases with the increase of the axial position of the monitoring point, and the temperature of the furnace center is higher. In the radial direction, the concentration of oxidation products is positively correlated with the temperature at the corresponding location. Heating for 8 h can significantly improve the reaction rate.
- coal spontaneous combustion,
- numerical simulation,
- combustion product,
- distribution characteristic,
- Darcy's law,
- heat transfer in porous medium

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