How it works

Standard configuration

The Aalborg CHB design consists of a large furnace welded to vertical, plain-type convection

tubes with spiral inserts. The low-alloyed plate material is easy to weld and is highly durable

to prevent cracking. Aalborg CHB boilers have fully water-cooled furnaces and can be

equipped with various burner types. The boiler comes complete with connections, foundation,

inspection hatches, manhole, hand-holes, insulation with sheeting as well as all valves and fittings.

Other standard features include:

• Modulating boiler water regulation

• Burner type according to preference and the type of fuel used

• Alfa Laval Gas Valve Units (GVU) and Methanol valve units (MVU) for alternative fuels

• Processor-based control system

• Control panel with touchscreen interface for all necessary operation, communication,

safety and alarm functions

• Integrated water-washing device

• Spare parts according to classification society demands

Standard configuration

The Aalborg CHB design consists of a large furnace welded

to vertical, plain-type convection tubes with spiral inserts. The

low-alloyed plate material is easy to weld and is highly durable to

prevent cracking.

Aalborg CHB boilers have fully water-cooled furnaces and can be

equipped with various burner types. The boiler comes complete

with connections, foundation, inspection hatches, manhole, hand

holes, insulation with sheeting as well as all valves and fittings.

Other standard features include:

• Modulating boiler water regulation

• Burner type according to preference and the type of fuel used

• Alfa Laval Gas valve units (GVU) and Methanol valve units

(MVU) for alternative fuels

• Processor-based control system

• Control panel with touchscreen interface for all necessary

operation, communication, safety and alarm functions

• Spare parts according to classification society demands

A pressurized deaerator ensures optimal feedwater quality

by thermally degassing dissolved oxygen and other non

condensable gases. This significantly reduces corrosion risk

and improves the reliability and longevity of the boiler system.

Technical data

Aalborg CHB boilers offer capacities ranging from 0.75 to 8 t/h.

Standard design pressure is between 10 and 18 bar(g), with

thermal output up to 6 MW. The table below shows capacities

and dimensions for the standard product range.

Benefits

The Aalborg CHB is a highly efficient boiler, with an efficiency level

of up to 89% at nominal load. With a number of advanced design

features, the boiler provides several important benefits for ship

owners and operators:

• Reduced fuel consumption with corresponding reduction in

vessel operating costs

• Decreased CO2 and NOx emission levels

• Good combustion due to proper furnace dimensioning

• Moderate loading and low material stresses

• Minimal refractory with water-cooled furnace bottom

Options

In addition to the standard configuration features, Aalborg CHB

can be equipped with a wide range of optional accessories

according to a specific vessel’s needs. These include:

• Flue gas economizer

For optimized performance and fuel savings, boiler can

be equipped with external flue gas economizer to further

improve thermal efficiency.

• Electrical heating elements

For emission-free port operation, electric heating elements

can be integrated to provide steam while the vessel is

connected to shore power.

• Water Chemistry Solution

Ensuring the long life cycle of steam generation system

equipment and maintaining operational reliability.

• Pressurized deaerator

Introduction

The Alfa Laval Aalborg CHB is a vertical, highly efficient marine

steam boiler designed with an advanced convection section. In

addition to conventional marine fuels, the boiler is fully compatible

with a wide range of alternative fuels, such as methanol.

For low-emission port operations, the boiler can be equipped

with integrated electric heating elements. This enables reliable

steam production while the vessel is connected to shore power,

eliminating the need for fuel firing during berth periods.

Thanks to an upgraded thermal design with optimized flue gas

oxygen content, the Aalborg CHB offers a level of efficiency that

far surpasses typical boilers of a similar capacity range. This

ensures both lower operating costs and a reduced environmental

impact.

Customer benefits

Easy installation

The boiler is ready to be plugged in. Supplied with ready-mounted burner, control panel,

fittings and cables.

Compact design

The small footprint makes the boiler easy to incorporate.

Easy inspection and maintenance

To the greatest possible extent, all connections and valves are located on top of the boiler

– easily accessible during installation, inspection and maintenance. A number of manholes

facilitate internal inspection.

Easy to clean

The smoke tubes are fast and easy to clean thanks to the low number and efficiency of

the spiral tubes.

Uniform, high steam quality

The boiler’s efficient steam drier delivers a dry, saturated steam. A superheater can also

be installed.

Improved combustion

The furnace has a comparatively low heat release ratio and provides ample space for the

flame. This improves combustion and limits flue gas emissions.

Accessories

The boiler plant can be equipped with economizer, superheater, condensate tank, deaerator,

feed water tank, blow down tank, and O2 combustion control.

Alfa Laval Aalborg steam boilers build on more than 100 years of boilermaking

experience. Fired Aalborg boilers combine proven thermal design with effective,

low-emission burner technology, which lets them deliver saturated or superheated

steam with high efficiency and reliability. Thanks to furnace and tube designs

that optimize durability as well as heat transfer, they provide lasting uptime

and performance in a wide range of marine and industrial applications.

Through over a century of work with steam and heat generation, Alfa Laval has

developed efficient and reliable boiler technology with high flexibility for modern

demands.

Benefits of Alfa Laval Aalborg steam boilers

• Flexibility to work with diverse fuels, pressure ranges and steam applications

• High thermal efficiency and reliable performance thanks to optimized furnaces

and tubing

• Easy installation and integration with the help of compact designs

• Robust boiler construction that delivers long service life in demanding conditions

• Easy inspection and maintenance that keep efficiency high and downtime low