Title

TENOVA TRGD DOUBLE REGENERATIVE BURNERS FOR LOW CALORIFIC VALUE FUELS

TENOVA TRGD DOUBLE REGENERATIVE BURNERS FOR LOW CALORIFIC VALUE FUELS

Authorship

Rocca, Alessandro Della; Senarega, Maurizio; Tomolillo, Marcello

Rocca, Alessandro Della

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Senarega, Maurizio

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Tomolillo, Marcello

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DOI

10.5151/2594-5297-39946

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Abstract

In integrated steel plants, large quantities of blast furnace gas (BFG) with a lower heating value of 3.1-3.3 MJ/Nm3 are available. Due to high nitrogen content, an efficient use of pure BFG in high temperature processes represents a technological challenge especially for reheating processes in hot rolling mills. In order to overcome the issues of BFG utilization as a fuel in large reheating furnaces, Tenova has developed a double regenerative burner technology. The development of Tenova TRGD burners was conducted through Tenova’s typical R&D approach. Using computational fluid dynamics (CFD) modelling the burner design was optimized, while laboratory tests allowed to validate the prototype phase. Long term industrial pilot tests were carried out to validate the final burner design. By means of preheating BFG with the waste heat content from the flue gases stream, the typical operating temperatures of reheating furnaces (1350 °C) can be achieved without any fuel enrichment.

In integrated steel plants, large quantities of blast furnace gas (BFG) with a lower heating value of 3.1-3.3 MJ/Nm3 are available. Due to high nitrogen content, an efficient use of pure BFG in high temperature processes represents a technological challenge especially for reheating processes in hot rolling mills. In order to overcome the issues of BFG utilization as a fuel in large reheating furnaces, Tenova has developed a double regenerative burner technology. The development of Tenova TRGD burners was conducted through Tenova’s typical R&D approach. Using computational fluid dynamics (CFD) modelling the burner design was optimized, while laboratory tests allowed to validate the prototype phase. Long term industrial pilot tests were carried out to validate the final burner design. By means of preheating BFG with the waste heat content from the flue gases stream, the typical operating temperatures of reheating furnaces (1350 °C) can be achieved without any fuel enrichment.

Keywords

Blast furnace gas; Regenerative burners; Furnace; Hot rolling mill

Blast furnace gas; Regenerative burners; Furnace; Hot rolling mill