Furnace Wall Burners: Industrial Furnace Burner Type
Selas Duradiant burners provide fast, controlled heating for metals, ceramics, chemicals, petroleum, glass and more.
Controlled radiant heat provides improved product quality and enhanced productivity for a wide variety of materials.
Selas Duradiant burners are cup-shaped, ceramic precision combustion tools which radiate heat to work pieces intimately, without flame impingement. The unusual freedom in placement and broad throttling ranges permit them to transfer heat in a variety of controlled patterns to suit many production requirements. Radiant heat distribution can be concentrated to simplify "spot" heating of product parts, patterned to meet uneven heat requirements, or arranged uniformly over wide areas.
FEATURES & BENEFITS
- High-speed radiant heat transfer allows for closer proximity between heat source and work-piece without flame impingement
- Differential heating possible with burner outputs of varying intensities
- Wide burner throttling ranges
- Improved product quality with minimal exposure to the effects of high temperatures
OPERATING PRICIPLES
As the diagram shows, air/gas mixture enters the burner tube and flows to the burner tip (1). After the mixture passes through the tip's threaded refractory orifices (2), it is distributed radially and burns within the refractory cup (3) in a petal-shaped formation. The inner contour of the cup is formed so that its surface is always "washed" by hot combustion products, regardless of operating rates.
Because the refractory cup surface is heated by high velocity combustion products at their highest temperature, it becomes incandescent. Combustion is always completed within the cup. Any "haze" seen beyond the cup is caused by incandescent products of combustion.
Radiant heat from duradiant burners can be directed accurately and travels more rapidly than convected heat from hot gases.