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Front wall fired Side wall fired Opposed wall fired Fuel
property
Chemical composition Percentage residue Viscosity Flash point
temperature Fire point temperature
There are many types of problems that can happen in oil gun
performance which can
be due to the influence of one of the factors above or a
combination of the above.
Normally experienced problems in oil guns in a boiler are (a)
Flame fluctuation, (b)
Fire puffs on starting, (c) Smoky flame and smoky stack, (d)
Improper flame
condition like flame smoky, flame front unstable, high flame
noise etc.
Flame Fluctuations can be caused by problems on the air side,
fuel side, and
atomizer side.
Air side
Low airo Inadequate airo Inadequate mixingo Fluctuation in air
flow
Forced air fan damper flap problem Air flow control mal
function
Burner air distribution Poor draft
Fuel side
Too high a firing viscosity Water in oil Fluctuation in oil
pressure Atomizing steam pressure variation
Atomizer side
Improper location Improper alignment Worm out atomizer
Fire puffs on starting can happen when the condition for
starting is not as per
requirement. Water in oil, low oil pressure, pilot flame not
stable or adequate,
incorrect windbox pressure, low air flow, and a worn-out
atomizer are some the
reasons for this.
Smoky flame and smoky stack is experienced by many while
operating the boiler orduring starting. The burner, fuel, and air
can contribute to this problem.
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Burner
Atomizero Damaged oil gum tipo Carbon deposit on tip
o Different tip in oil burnero Dirty oil guno Oil gun positiono
Damaged diffusero Improper alignment of oil gun
Burner swirler Air register swirler
Air side
Low excess air level
Improper air distributiono Inter burnero Intra burner
Fuel side
Low oil temperature High atomizing viscosity inlet to oil gun
Low oil pressure Oil pressure fluctuation
Causes for Improper Oil Combustion
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