Low NOx Oil Burners DB Riley is now Babcock Borsig Power, Inc. DB Riley offers a complete line of low NOx burners and burner systems for all types of boilers. The STS B urner consists of primary and secondary air zones equipped with moveable flow control shrouds that slide over the air inlets to each passage. Two electrically or pneumatically operated drive mechanisms mounted at the top of the front plate provide reliable, non-binding movement. Primary air is delivered through the center of the burner which houses the gas canes, oil gun, and primary air swirler.
Secondary air flows through the outermost annulus surrounding the primary air.
The secondary air register has curved, overlapping blades which provide excellent swirl control and low pressure drop. Separating the swirl control and flow control adjustments gives the STS burner significantly more control and allows for higher turndown capability. For natural gas firing, a series of externally adjustable gas canes are provided, uniformly spaced in a circular pattern inside the primary air barrel. Adjustments include both axial and rotational tip position, and can be made while the unit is on line firing gas. This controls NOx emissions and eliminates any possible combustion-induced vibration.