TY - JOUR
T1 - Energetic analysis of reheating furnaces in the combustion of coke oven gas, Linz-Donawitz gas and blast furnace gas in the steel industry
AU - Mariños Rosado, Diego J.
AU - Rojas Chávez, Samir B.
AU - Amaro Gutierrez, Jordan
AU - Mayworm de Araújo, Fernando H.
AU - de Carvalho, João A.
AU - Mendiburu, Andrés Z.
N1 - Funding Information:
The authors are grateful to FAPESP (Fundação de Amparo à Pesquisa do Estado de São Paulo) for support of this work through Project 2017/08975-1 .
Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2020/3/25
Y1 - 2020/3/25
N2 - The reheating furnace of the steel industry was evaluated in the present study, which uses the gas mixture from coke oven (COG), steelmaking process “Linz-Donawitz” (LDG) and blast furnace (BFG); with the production of steel laminates being its main activity. Two methods were developed in this work to deal with energy consumption. The first dealt with improved estimation of heat losses in the furnace, and the second dealt with recovery of heat and its use in load preheating and combustion air preheating. These evaluations were intended to determine the best selection of material for insulation of the furnace, in order to increase heat transfer, to obtain an economy in fuel consumption, and to improve technical energy indicators of production and heat generation, as well as to improve the efficiency of the furnace and the combustion process. When developing the present study in the reheating furnace it was evidenced an economy in the fuel consumption of the COG/LDG mixture of 6606 m3/h and 4627 m3/h for the load preheating and the air preheating, respectively. In addition, efficiency of the furnace was increased by 23.3% and 15.2%, with the technical energy indicators improved by 18.9% and 13.2% in each case. For the COG/BFG mixture, the results obtained were similar.
AB - The reheating furnace of the steel industry was evaluated in the present study, which uses the gas mixture from coke oven (COG), steelmaking process “Linz-Donawitz” (LDG) and blast furnace (BFG); with the production of steel laminates being its main activity. Two methods were developed in this work to deal with energy consumption. The first dealt with improved estimation of heat losses in the furnace, and the second dealt with recovery of heat and its use in load preheating and combustion air preheating. These evaluations were intended to determine the best selection of material for insulation of the furnace, in order to increase heat transfer, to obtain an economy in fuel consumption, and to improve technical energy indicators of production and heat generation, as well as to improve the efficiency of the furnace and the combustion process. When developing the present study in the reheating furnace it was evidenced an economy in the fuel consumption of the COG/LDG mixture of 6606 m3/h and 4627 m3/h for the load preheating and the air preheating, respectively. In addition, efficiency of the furnace was increased by 23.3% and 15.2%, with the technical energy indicators improved by 18.9% and 13.2% in each case. For the COG/BFG mixture, the results obtained were similar.
KW - Combustion air preheating
KW - Energy consumption
KW - Heat recovery
KW - Load preheating
KW - Reheating furnace
KW - Steel industry
UR - http://www.scopus.com/inward/record.url?scp=85078073466&partnerID=8YFLogxK
U2 - 10.1016/j.applthermaleng.2020.114905
DO - 10.1016/j.applthermaleng.2020.114905
M3 - Article
AN - SCOPUS:85078073466
SN - 1359-4311
VL - 169
JO - Applied Thermal Engineering
JF - Applied Thermal Engineering
M1 - 114905
ER -
