Thermal Effects of Natural Gas and Syngas Co-Firing System on Heat Treatment Process in the Preheating Furnace

Piotr Jóźwiak, Jarosław Hercog, Aleksandra Kiedrzyńska, Krzysztof Badyda and Daniela Olevano
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Piotr Jóźwiak: Thermal Processes Department, Institute of Power Engineering, 01-330 Warsaw, Poland
Jarosław Hercog: Thermal Processes Department, Institute of Power Engineering, 01-330 Warsaw, Poland
Aleksandra Kiedrzyńska: Thermal Processes Department, Institute of Power Engineering, 01-330 Warsaw, Poland
Krzysztof Badyda: Institute of Heat Engineering, Warsaw University of Technology, 00-665 Warsaw, Poland
Daniela Olevano: Centro Sviluppo Materiali S.p.A., 00128 Rome, Italy

Energies, 2020, vol. 13, issue 7, 1-15

Abstract: Preheating furnaces, which are commonly used in many production sectors (e.g., iron and steel), are simultaneously one of the most energy-intensive devices used in the industry. Partial replacement of natural gas with biomass-derived synthesis gas as a fuel used for heating would be an important step towards limiting industrial CO 2 emissions. The time dependent computational fluid dynamics (CFD) model of an exemplary furnace was created to evaluate whether it is possible to obtain 40% of energy from syngas combustion without deterioration of thermal parameters of the treated load. As an outcome, a promising method to organize co-firing in the furnace was indicated. The obtained results show that the co-firing method (up to 40% thermal natural gas replacement with syngas), assuming low air-to-fuel equivalence ratio (λ NG = 2.0) and even distribution of power among the furnace corners, lead to satisfactory efficiency of the heat treatment process—the heat transferred to the load exceeds 95% of the heat delivered to the load in the reference case), while carbon dioxide emission is reduced from 285.5 to 171.3 kg CO 2 /h. This study showed that it is feasible (from the heat transfer point of view) to decrease the environmental impact of the process industries by the use of renewable fuels.

Keywords: CFD modelling; heat treatment process; industrial furnaces; natural gas substitution; syngas co-firing (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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