Aalborg OC Marine Boiler

Aalborg OC (formerly MISSION™ OC) is a high performance, combined oil and exhaust gas-fired boiler, with a 0.75-5 t/h capacity of the oil-fired section at 9 bar(g) design pressure.

Aalborg OC is a vertical, cylindrical boiler with an exhaust gas section consisting of bare smoke
tubes while the oil-fired section features pin tubes in the convection section.

Pin tube element
The boiler design has integrated pin tube elements. The pin tube elements support both the furnace and the boiler top plate. The design has been significantly optimized to achieve lower weight and improved strength. The result: longer lifetime of the pin tube
by a factor of 8.

Construction
Aalborg OC is a vertical boiler with an exhaust gas section consisting of bare smoke tubes. The cylindrical shell surrounds the smoke tubes, the furnace, the steam space and the convective section, which consists of pin tube elements. The boiler pressure part is manufactured from mild steel able to withstand high temperatures. Stress concentrations in corners are minimized by the simple design of cylindrical shells with flat plates of equal thickness.

Burner
Aalborg OC is equipped with a monobloc type pressure-jet burner. The burner is hinge-mounted and can be swung out for service and easy access to inspect the furnace. The burner housing is mounted on the boiler front, angled 15 degrees downwards against the furnace bottom. This allows for a long flame and offers better utilization of the furnace.
The flow of the combusting particles becomes optimal, and the result is a high performance combustion - even with the lowest grades of fuel. As an alternative, Aalborg OC can be equipped with a rotary cup burner.