Control system
Reliable and intelligent, the user-friendly Alfa Laval Touch
Control system provides fully automatic operation of
the boiler plant and the pressure-atomizing burner.
The system includes controls for the burner load and
sequence, burner motor, water level and safety device,
as well as starters for the fuel heater and fuel oil pumps.
The Aalborg i-OC is a vertical and cylindrical boiler
that employs natural circulation of water and steam. Its
pressure sections are manufactured from mild steel that
is able to withstand high temperatures.

The plant is designed according to Alfa Laval’s modular
Aalborg boiler concept, with a main module that
comprises two parts: an oil-fired section and an exhaust
gas section that recovers heat from the main engine.
One or two optional exhaust gas modules (Alfa Laval
Aalborg Micro boilers) can be incorporated for auxiliary
engine waste heat recovery. Handling the auxiliary
exhaust gas with separate but connected modules
ensures flexibility and a stress-free plant design.
• Oil-fired section
The oil-fired section of the main module comprises a
furnace, a steam space and a convection section. The
convection section, through which the flue gas flows,
consists of helix tubes with a turbocleaning effect.
• The modulating-type pressure-atomizing burner
(Aalborg MF PA) is fully integrated with the
convection part of the oil-fired section. The burner
housing is mounted on the boiler front, angled 15°
downwards towards the furnace bottom. It optimizes
the flue gas flow distribution during combustion,
which results in higher performance in the
convection part and lower NOx emissions.
• Main engine exhaust gas section
The main engine exhaust gas section comprises
smoke tubes and an internal bypass damper. The
bypass consists of a plain tube welded to the lower
and upper tube plates, with the automatic damper
installed in the top.
• Auxiliary engine exhaust gas boilers (optional)
The exhaust gas boiler modules for auxiliary engine
waste heat recovery comprise serrated and finned
spiral tubes. Each module has its own exhaust gas
bypass damper. These smaller modules are bolted
directly to the main module, with no piping or other
equipment. All boiler mountings are shared with and
installed on the main module.
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