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

Energies

Daniela Olevano¹  Krzysztof Badyda²  Aleksandra Kiedrzyńska³  Jarosław Hercog³  Piotr Jóźwiak³ 

[1] Centro Sviluppo Materiali S.p.A., 00128 Rome, Italy;Institute of Heat Engineering, Warsaw University of Technology, 00-665 Warsaw, Poland;Thermal Processes Department, Institute of Power Engineering, 01-330 Warsaw, Poland;

关键词: CFD modelling;    heat treatment process;    industrial furnaces;    natural gas substitution;    syngas co-firing;   

DOI  :  10.3390/en13071698

来源: DOAJ

【 摘 要 】

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 CO₂ 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 CO₂/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.

【 授权许可】

Unknown