Development of Impinging Jet Burner Using Ammonia Fuel for Degreasing Steel Sheets

Abstract

Ammonia has been expected as a hydrogen energy carrier to prevent global warming because hydrogen has no carbon and it means CO2 free combustion. However, there are some challenges to burn ammonia. The reasons are its low combustion intensity, low radiation intensity, and high NOx emission. This paper shows the potential of a burner using ammonia fuel in an industrial furnace. Burner itself should be developed to burn ammonia fuel which is mixed in natural gas. Several types of burner design and several ratios of ammonia volume in natural gas were evaluated. Arrangement of burners in an industrial furnace is also important to get uniform heating on a steel sheet because dirt and oil on the steel sheet should be burned for degreasing. Distance of burners in one line and distance of lines were decided with evaluating uniformity of heating. Minimal capacity of furnace which has a developed impinge jet burner with optimal arrangement was installed in a continuous galvanizing line which produces galvanized steel sheets being supplied to automotive industry, appliance industry, and construction industry. The developed impinge jet burners performed as expected ability in the industrial furnace.