Distributed Air Flow Burner

80% NOx reduction on gas Wide turndown range Lowest practical excess air No moving parts during operation Preferred choice for packaged boilers Over 700 units in operation ULN technology for sub 20 ppm

The Coen Distributed Air Flow (DAF) multi-staged low NOx burner is designed for low NOx applications on single or multiple burner units. For many applications, the burner is capable of firing over a 10:1 range.

Design Features

The DAF burner can be used with other Coen low NOx techniques such as flue gas recirculation, and front or side wall NOx ports for oil firing.

Adaptable to burning gaseous and/or liquid fuels such as natural gas, refinery gas, hydrogen, coke oven gas, landfill gas, light and heavy fuel oils, refinery pitch, coal/water slurries, and waste fuel streams.

Can be packaged with windbox, forced draft fan, piping, burner management and controls for both integrated multi-burner set up or in Coen's “Fyr-Compak” single or dual burner configuration.

Typically, particulates will be well below the EPA required 0.1 lbs/MBtu with fuel oils containing 0.1 ash or less. Guarantees can be made based on analysis of furnace/fuel conditions by Coen application engineers.

A wide variety of atomizers are available for liquid fuels such as light grade fuel oil to heavy fuel oils and coal/water slurries, employing steam, air or natural gas atomization.

For remote operation on multi-burner applications, atomizers can be equipped with pneumatically-operated automatic retract and steam purge assemblies.

The inner core venturi section reduces combustion air pressure drop which helps to lower fan horsepower cost.

For automatic operation on multi-burner applications, annulus louver can be automated to prevent excessive combustion air from bypassing through non-operating burners.

Can simultaneously fire liquid and gaseous fuels for reducing operating expenses.

Multiple gas spuds arranged to minimize NOx formation. Each spud has a screwed connection facilitating spud replacement if fuel conditions change at a later date. External cane-type spuds can be used for dirty gas applications. They can be fitted with individual shut-off cocks for changing or cleaning without system shutdown.

For more information about this product, talk to your nearest Coen Sales Representative.

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