Combustion Catalog | Fives North American

Patented technology, robust design

APPLICATIONS — Air heaters — Incinerators

4213 Emissions Data Burner Rated for 15.5 MMBTU/h HHV

25

— Process heaters — Rotary processes — Spray Dryers — Calcining

20

15

— Lower temperature solutions where secondary air is normally employed to achieve process temperatures between 300-1600°F

10

5

FEATURES and BENEFITS

0 40 45 50 55 60 65 70 75 80 Excess Air %

— Patented lean premix technology — Low NOx and CO emissions without the use of FGR — NOx emissions of less than 10ppm in many applications — High turndown capability — Low fan horsepower requirement

— Robust, proven, reliable burner design. Successful installations over 25 years. — The majority of the combustion is completed in the companion reaction chamber, minimizing process influences on NOx emissions. — Compact flame geometry allows significant reductions in flame protection tube and furnace size resulting in a lower installed cost of LEx systems. — Main (Primary) combustion air can be heated up to 700°F for increased efficiency. (Ambient air required for radial air supply).

OPERATION

— Combustion air supply is split between main (primary) air and radial air connections on larger burner sizes. — Fuel gas is split between primary gas and radial gas connections. — Radial gas is used at start-up and for stabilization of the primary (lean) core. — Primary gas feeds internal mixers to create a lean primary zone, typically operated at 60-70% excess air. — Main air pressure: 10-15 in. w.g. — Gas pressure: 8 PSIG — Minimum primary air pressure required for continuous operation: 0.75 in.w.g. — Preset air-to-gas ratio turndown of greater than 4:1, with appropriately designed combustion system. — Thermal turndowns of 20:1 are also possible in most applications

MAIN COMBUSTION AIR INLET

RADIAL AIR INLET

POC RECIRCULATION

RADIAL GAS INLET

PRIMARY GAS INLET

POC RECIRCULATION

ANTI-FLASHBACK MIXERS

PRIMARY REACTION ZONE

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