ZEECO, INC.

ZEECO, INC.

Ultra-Low Emissions Burners

Round Flame Shape, Ultra-Low NOx Emissions Gas

Burners for Refinery and Chemical Plant Applications

ZEECO, INC.

Overall Design Burner Tips (Gas Orifice) Controls Gas Flow

Burner Tile (Air Orifice) Controls Air Flow

Pilot

Damper Blades (Controls Excess Air)Muffler Noise (Reduction)

Windbox (Guide Air Through Burner)

Fuel Gas Manifold (Guides Gas Through Burner)

Tile Case and Mounting Plate

ZEECO, INC.

Design Summary Round flame, gas burner design

NOx reduction method: Internal Flue Gas Recirculation (IFGR) by mixing the gas fired from the secondary gas port with the inert products of combustion which lowers thermal NOx production.

Combustion air induction: natural, forced, induced and balanced draft, or turbine exhaust

Mounting options: up-fired, side-fired and down-fired

ZEECO, INC.

How It WorksInert Flue Gas

Combustion Air

Fuel Gas

Products of Combustion (Heat is Produced)

Secondary Firing Ports

ZEECO, INC.

Ultra-Low Emissions Features One (1) 60% Al2O3 Secondary Tile

Four (4) 310SS Gas Tips

Four (4) Sch 40, CS Gas Risers

One (1) Sch 40, CS Gas Manifold

One (1) 10 Gauge CS Windbox

One (1) 10 Gauge CS Air Damper

ZEECO, INC.

Performance Summary Ultra Low NOx Emissions:

NOx (Gas Fired) Range (Natural Draft): 20 to 45 ppmv NOx (Gas Fired) Range (600F Air Preheat): 50 to 80 ppmv

Heat Release Range: Nat. Draft: 1 to 20 MM Btu/hr [0.293 to 5.860 MW] F.D.: 1 to 50 MM Btu/hr [0.293 to 14.650 MW]

Turndown: 5:1 gas or greater for most cases

Design Excess Air Range:10% to 25% for most cases

Combustion Air Pressure Drop: Natural Draft: 0.2” to 1” (5 to 25 mm) H2O Forced Draft: 0.5” to 8” (12.7 to 200 mm) H2O

ZEECO, INC.

Ultra-Low NOx Emissions

Ultra-low emissions are

achieved by gas exiting the

secondary gas port of each

tip and mixing with the inert

products of combustion in

the furnace. The resulting

composition burns at a lower

peak flame temperature

resulting in lower thermal

NOx production.

ZEECO, INC.

Low Maintenance Cost and Downtime Since the gas tips do not stick into the

furnace more than 1” (25 mm), they are

not as exposed to the thermal heat and,

therefore, offer long life. Port plugging is

also reduced due to the lower

temperature and the use of only one

firing port for most cases which results

in a larger diameter firing port. In addition, no metal flame stabilization

devices are used, which also reduce down time and maintenance

requirements.

ZEECO, INC.

Compact Design and Flame Shape

Because the burner has a compact

design and flame shape, the burners

can be retrofitted into applications

where other ultra-low NOx emissions

burners cannot. The burners can be

mounted close together without

problems due to flame interference.

ZEECO, INC.

Operation in Vertical Cylindrical Heaters

Ultra-low NOx burners have historically

had a difficult time operating in Vertical

Cylindrical (VC) heaters.

The GLSF Min-Emissions on the other

hand, with its compact flame width, is a

great option for use in VC heaters.

ZEECO, INC.

Example Min-Emissions Burner

Fuel Gas: 32% Natural Gas48% Hydrogen20% Propane

Heat Release: 6.98 MMBTU/HR% O2: 3.0 PPMVNOx: 30.4 PPMV

CO: 0 PPMV

Fuel Gas: 32% Natural Gas48% Hydrogen20% Propane

Heat Release: 6.07 MMBTU/HR% O2: 3.0 PPMVNOx: 28.8 PPMV

CO: 0 PPMV

ZEECO, INC.

Precise Air Control with Bearings & Gears For combustion to work

properly, the correct amount of

combustion air must be supplied

to each burner. Therefore, it is

recommended to use calibrated

opposed blade dampers

connected together with gears.

For smooth precise movement,

the damper shafts are

supported by bearings.

ZEECO, INC.