Diffuse Mode Combustion – Ultra-Low NOx Technology with Proven Temperature Uniformity Benefits for Forge and Heat Treat Applications

Fives North American Combustion’s Diffuse Mode Combustion (DMC) is a patented flameless technology that can achieve ultra-low NOx emissions and improve temperature uniformity in forge and heat treat applications.  DMC technology applied to the industry standard Tempest® burner builds upon proven heat patterns and furnace performance, while reducing NOx emissions to ultra-low levels in furnaces operating from 1500 to 2300°F. By allowing fuel and air to combust in a dilute, volumetric basis within the furnace, rather than the burner tile, the maximum flame temperature is reduced and the point source of radiant energy normally present in the flame is smoothed out, improving temperature uniformity.  

The Tempest® DMC product can operate at an extremely wide range of air/fuel ratios, from 30% excess fuel to 2000% excess air (Not in DMC, but I’m not sure that is critical for an abstract).  The product is also capable of StepFire™ in order to maximize fuel savings if desired.

The Tempest DMC was launched in 2015 and this will serve as an update to the product, specifically highlighting successes in the field. Uniformity results and emissions results from two different aerospace forging applications will be presented.