MIL-HDBK-1003/6
g) Low-NOx Burners. Low-NOx burners have a wide variety of
designs. The principle of all low-NOx burners is the same; they inherently
generate lower NOx emissions due to internal staging of fuel combustion, see
reference: EPA/625/5-86/020, Nitrogen Oxide Control for Stationary Combustion
Sources.
Oil Atomization. Oil burner atomizing efficiencies and cost may
5.2.3.3
vary widely due to the method of atomization, fuel characteristics, and cost
of energy for heating oil or power to drive pumps and blowers. Satisfactory
atomization depends upon proper control of pressures, temperatures, and
viscosity or fluidity of the fuel. Adequate inspection, maintenance, and
repair schedules are essential for efficient operation. Final selection of
the methods of atomization together with the arrangement and degree of
automatic controls, should be based on design and performance data obtained
from the burner manufacturers. For preliminary operating and plant heat
balance calculations, the following estimates may be used for final comparison
with manufacturer data:
a) Amount of atomizing agent required for each gallon of oil
burned per hour:
Low-pressure air
-
10 to 15 scfm (0.282 to 0.433 square meters)
High-pressure air
-
2.5 to 3 scfm (0.0704 to 0.0845 cubic meters)
Steam
-
2 to 8 lbs of steam per hr (0.907 to 3.63 kg/hr)
Mechanical pressure
-
none
Rotary cup
-
none
b)
Horsepower required to atomize each gallon of oil burned per
hour:
Low-pressure turbo blower (16 psig (110.4 kPa))
-
0.1 Hp (0.075 kW)
High-pressure compressor (75 psig (517.5 kPa))
-
0.4 Hp (0.030 kW)
Steam (100 psig (690 kPa))
-
0.12 Hp (0.09 kW)
Mechanical pressure (100 psig (690 kPa))
-
0.32 Hp (0.24 kW)
Rotary cup
-
0.050 Hp (0.0373 kW)
5.2.3.4
Recommendations
a)
Burners of the nozzle mixing type are recommended.
b) It is recommended that direct-ignition of any grade oil not be
allowed. All ignition systems should be spark-ignited-pilot ignition type.
Use of propane gas for this purpose may present a fire hazard. Because of its
high density, leaking propane may accumulate in low-lying areas in the plant.
Light gases such as natural gas should be used when available.
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