2.4.2.1
Burner
a.
Burner Characteristics: The burner shall be quiet in operation
and shall operate with a balanced clean stable flame so as not to
localize heat in any part of the combustion chamber. The burner
shall be capable of completely atomizing and effectively mixing
the oil with air so as to insure complete combustion. The air
admitted shall be of sufficient quantity for complete combustion,
but not of such quantity as to produce an undue percentage of
excess air with attendant high stack loss. The oil burner shall
operate without clogging or failure, and shall have sufficient
capacity to develop not less than the specified capacity. The
burner unit shall be easily removed from firing position and
readily accessible for inspection, cleaning, and other purposes.
Provide adequate observation ports on burner. There shall be no
flame impingement on the sidewalls, top, bottom or rear walls of
the furnace. Contractor shall install refractory throat tiles or
other items provided by the burner manufacturer which may be
required for proper installation of the burner.
b.
Atomization: Burner shall be [steam atomizing; steam pressure at
header is [_____] kPa (gage) psig; steam temperature at header is
[_____] degree C F] [air atomizing; filtered compressed air shall
be available for burner atomization and the maximum requirement
for each burner shall not exceed [_____] L/s scfm of air at [_____]
kPa (gage) psig]. Provide pressure reducing valve and controls as
required.
[c.
Electric Ignition System: Burner shall be equipped with an
electric ignition system. System shall be either the high energy
ignition or glow rod type. Gas ignition system is not acceptable.
High energy ignition system shall provide stored energy to
develop 2000 volt DC pulses. Glow rod system shall provide a low
voltage, carbon rod electrode which develops a tip temperature of
1427 degrees C 2600 degrees F. Provide ignition system complete
in all respects.]
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NOTE: At the text below, a gas pilot ignition
system is optional for a combination oil/gas burner.
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[d.
Natural Gas Pilot Ignition System: Provide a complete
interrupted type natural gas-fired, spark ignited pilot system for
the burner assembly. Combustion air supply shall be from the
burner windbox. Lighting system shall have capacity to stabilize
the firing during startup periods. Lighter shall be arranged for
easy removal and servicing while the boiler is in operation.
Furnish ignitor complete with a spark rod and a power pack. Power
pack shall operate on 120 volt, 60 cycle, single phase power.
Provide gas piping, to one point of supply, including necessary
gas pressure regulators. Ignitor system shall include controls,
gages, flame safety systems, interlocks and accessories to comply
with Industrial Risk Insures' (I.R.I) (formerly F.I.A.)
requirements and applicable codes and regulations.]
e.
Windbox: Construct of carbon steel plate not less than 10 gage
thickness with 6 mm 1/4 inch thick front plate. Design windbox to
provide even and uniform air entrance into the burner register and
SECTION 15511N
Page 35
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