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7/31/2019 Boiler Module V
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PRESSURE JET BURNERS
1. Simple, Inexpensive and Robust
2. No moving parts, Hence no possibility of seizure
3. Large range of droplet size for one pressure
4. Turndown ratio low, about 2.5 : 1
5. Maximum throughput about 3200 kg/h
6. No alteration in air register arrangements for all
outputs
7. To vary throughput the pressure must bealtered, this results in variation in droplet size,
hence atomization and combustion will be
affected
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THE KBO PRESSURE JET BURNER
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General
The KBO burner is a pressure jet burner of the mono-block type designed for
modulating operation. The design of the burner makes installation, adjustment and
servicing easy. Furthermore, it ensures that the flame is kept highly stable at all
loads.
Capacity range: 650 - 3500 kW
Description
The KBO pressure jet burner is a robust design to meet the requirements in themarine environment. It is a reliable, fully automatic heavy fuel oil burner with only
simple requirements to the installation.
The KBO burner is a mono-block design making installation cheap and quick due
to pre-wiring, pre-piping and pre-testing before leaving the factory. The burner is
provided with hinges for easy swing out for inspection and maintenance purposes.
Electric connections are easily accessed under the top cover. The burner is
designed to be operated with the computerized MISSION Control System from
Aalborg Industries.
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STEAM/AIR BLAST JET PRESSURE
BURNERS
1. A wide Turndown range while still adhering to the simple pressure jet
principle of atomization.
2. Single valve control of oil supply and avoidance of the use of spill back or
other complicated systems of fuel metering
3. Quick reversion to the conventional pressure jet atomizer when steam or air
is not available.4. Improved atomization over the complete range resulting in quicker cleaner
combustion
5. Higher overall combustion efficiency offsetting the use of assisting steam
energy for atomization
6. Complete stability over the range including the extended range at low oilpressure and low air velocities
7. Complete absence of any interaction between the steam and oil flows which
simplifies the control of each fluid and the adaptation of the atomizer to
automatic control
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KBSD STEAM ATOMIZING BURNER
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General
The KBSD steam atomizing burner is designed for use on our top-fired boilers
and is delivered pre-mounted. A dynamic wind-box provides for low pressure loss
and a stable combustion at low loads. All burner mountings are arranged to ensure
easy installation and maintenance.Capacity range: 1.7 46.6 MW
Description
The KBSD steam atomizing burner has been designed to meet customer
requirements such as high turn-down radio, minimum installation and operation
costs, and the capability to produce inert gas at low loads. Furthermore, the burnermeets future marine environmental legislation regarding NOx and particulate
emissions.
Combustion processes are controlled by adjusting the swirl angle of the air flow,
enhanced by very reliable system components controlling the fuel air flow. The
KBSD burner has passed a rigorous and very extensive testing program, proving
that the burner performs well on all grades of fuel oil.
Additionally, the burner design has made it possible to achieve stable combustion
with an excess air ratio of approx. 1.15. Safe ignition of the burner is ensured by the
fixed ignition burner which is equipped with its own ignition transformer, oil pump and
nozzle. During operation of the main burner, the ignition burner is purged with air in
Order to prevent coke formation on the nozzle and the electrodes.
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1. Reduced maintenance
2. Wide Turndown ratio
3. Excellent flame stability at all loads
4. Frequency of sound
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ROTARYCUPBURNERS
1. High output possible
2. Low oil supply pressure.
3. At low throughputs, atomization due to reduced oil
film thickness is improved
4. Wide turndown ratio up to 20:1
5. Oil viscosity need only be reduced to about
satisfactory operation.
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KB ROTARY CUP BURNER
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General
The operation of the KB rotary cup burner is automatic, simple and reliable, also when fired with
a combination of fuels as is often the case. The design is compact and the burners easy to
maintain.
Capacity range: 1.9 38 MW, 170 3,400 kg/h
Description
The KB rotary cup burner has been designed to meet customer requirements such as reliable operation, easy
maintenance and minimum installation requirements. The design is based on Aalborg Industries long-term
experience in marine boilers and combustion technology, ensuring optimum burner performance for demanding
customers.The working principle of rotary cup burners is based on atomising by centrifugal force. The atomising cup is driven
at high speed via a heavy-duty belt drive. The oil is gently positioned at low pressure into the spinning cup where
gradually, and forced by the centrifugal action of the cup, it moves forward until it is thrown off the cup rim as a
Very fine, uniform film.
The high-velocity primary air discharged around the cup strikes the oil film, breaks it up and converts it into a mist
of fine particles which are introduced into the combustion zone and burner. The secondary air necessary for
Complete combustion is supplied by a forced-draught fan through the wind box and burner air register. Normally,atomizing is effected at a viscosity of approx. 45 cSt. which ensures a particle size small enough to burn quickly
and completely.
Heavy fuel oil fired rotary cup burner The KB burner is a typical rotary cup burner with combustion air according
to the forced draught fan location principle. Larger burners of types KB 16003400 have a separate primary air
fan that receives its air supply from the forced draught fan.
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3 - NOZZLES TYPE PRESSURE JET BURNER
Circulatingoil
Outlet
CirculatingOilInlet
Pressure
oilInlet
Drain Valve
Valve
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SV 3SV 2SV 1
Circulating Line
DieselOil
ServiceTank
ELECTRIC
HEATER
SV 4
HeavyFuelOil
ServiceTank
Booster Pump No. 2
Shut off
Valve 2
STEAM
HEATER
Booster Pump No. 1
Electric Heater
Flow
Meter
SV : SOLENOID VALVE
Burner
Pressure Valve (11 Bar) Pressure Valve (32 Bar)
Shut off
Valve 1
Circulating Pump
Back Pressure Va lve
Change
Over Valve
Back Pressure Valve
Supply Pump No.1
Supply Pump No.2
Filter
Filter
Duplex
Filter
Steam Heater
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