Isao Mori

Heat transfer improvement and NOx reduction by highly preheated air combustion

The recent development in the design of regenerative combustion systems, in which a ceramic honeycomb is used as a heat storage medium in the regenerator, has raised the preheated air temperature up to 1600 K. Highly preheated air combustion increases heating potential of flue gas and reduces fuel consumption. However, highly preheated air combustion increases the potential of NOx emission. Thus, the development of a low NOx burner is required for the application of this technology to commercial use. In this paper, a newly developed low NOx regenerative burner is presented. Theoretical and numerical analyses of fuel saving in highly preheated air combustion are also discussed.

Heat transfer improvement and NOx reduction in an industrial furnace by regenerative combustion system

Recent development of the regenerative combustion system in which ceramic honeycomb is used as a heat storage medium in a regenerator, has raised preheated air temperature up to 1600 K. By preheating the combustion air, the heating potential of the furnace gas is increased and the fuel consumption is reduced dramatically. However, higher air temperature increases the potential of NO/sub x/ formation. Therefore, to apply this technology for commercial use, development of low NO/sub x/ burner is strongly requested. In this paper, newly developed low NO/sub x/ burner as well as the high performance honeycomb regenerator is explained. Also, theoretical and numerical analysis of fuel saving by the high preheated air combustion is discussed.