Alfa Laval Aalborg D Multi-fuel

Aalborg D Multi-fuel boiler with top-fired burner technology

for Offshore applications

Introduction

The Alfa Laval Aalborg D Multi-fuel is a high-performance oil- and

gas-fired boiler engineered for the demanding conditions of the

offshore industry. Featuring advanced top-fired burner technology,

it delivers optimal combustion and flexibility, supporting both steam

and air atomization for reliable operation.

Designed to operate efficiently with a wide range of fuels, including

MGO, MDO, LNG, VOC gas, HFO, LFO, liquid condensate, and

crude oil, the Aalborg D adapts seamlessly to your fuel supply and

operational needs.

Available as a saturated steam boiler, superheated steam boiler, or

hot water heater, it is ideal for service steam, power generation, and

heat exchange applications offshore.

The Aalborg D’s multi-fuel, multi-burner configuration allows

burners to operate simultaneously on gas and liquid fuels, as well

as dual-fuel firing across various load ranges using advanced

combustion techniques. Integrated flue gas recirculation and

air/fuel staging reduce NOx emissions, ensuring compliance

with international emissions standards and supporting your

sustainability targets.

Key benefits of choosing the Aalborg D Multi-fuel boiler

• Robust control system architecture supports reliable,

continuous operation.

• Pressure part designed with natural circulation for high

availability and operational resilience.

• High steam quality for power generation and/or process

utility steam

• High thermal efficiency exceeding 85% without the need of

exhaust gas economizers ensuring lower CAPEX

• Optional economizer for optimal thermal efficiencies

exceeding 95% ensuring lower OPEX

• Designed with low-NOx burners, using air/fuel staging

technology

• Designed using flue gas re-circulation to achieve lower NOx

operation in accordance with industry standards.

• Combustion system suitable for wide range of fuels - both

gaseous and liquid - from standard marine fuels to various

offshore crude qualities in addition to volatile organic

compound gases with reduced heating values

Boiler design

The Aalborg D features a compact, vertical “D”-shaped

configuration with interconnected steam and water drums.

Its furnace is built with fully water-cooled membrane walls and

minimal refractory, ensuring durability and safety in harsh offshore

environments. The convection section uses straight pin tubes with

bent pins for high heat transfer and low pressure loss.

Reliable water circulation is maintained by external downcomers,

preventing overheating and tube burnout.

Integrated Burner Technology

Alfa Laval’s Gosfern® dual-fuel burners offer maximum flexibility

and efficiency for offshore use. They operate with a wide range

of liquid and gas fuels and can fire both simultaneously, ensuring

seamless fuel switching and reliable operation.

Precisely integrated with the Aalborg D furnace, these burners

deliver stable combustion, low emissions, and consistent

performance—even under changing load conditions. This robust

technology supports environmental compliance and operational

efficiency, making it ideal for offshore environments.

Advanced control systems maintain stable steam pressure and

high steam quality, while hot water heater operation is managed

by precise temperature control.

Capacity range

With steam capacities ranging from 45 to 130 t/h and hot water

outputs up to 90 MWth, the Aalborg D ensures reliable, efficient,

and flexible performance to meet the demanding requirements of

offshore applications.

Key Features

• Flexible production of both steam and hot water to meet

diverse offshore needs

• High-capacity output: up to 130 t/h steam or 90 MWth hot

water

• Robust design pressure up to 48 bar(g) for demanding

operations

• Superheated steam available up to 415 °C

• Versatile multi-fuel capability

• Efficient, integrated multi-burner system with minimal

refractory requirements

• Engineered for both indoor and outdoor use, including

hazardous area compliance

• Comprehensive auxiliary systems available, such as

combustion skids, gas valve units, and feedwater solutions

• Delivered as modular packages or loose components for

flexible installation