Karl Segerström's sawmill is located outside Fagersta and produces structural timber for glulam beams, roof trusses and panels. Karl Segerström AB specializes in spruce. To enable expansion, they are now investing in a new modern fully-automated boiler plant from AKJ Energiteknik where they plan to burn most of the bark. A complete new boiler plant is being built next to the sawmill.

AKJ Energiteknik is the turnkey contractor for the machine and process equipment. The contract includes design, installation and commissioning of a complete boiler plant with fuel handling with rod feeder, incinerator, boiler, flue gas cleaning with electric filter, mechanical, pipe and electrical installations and control systems.

The combustion equipment is performed with AKJ's moving grate technology combustion system for moist sawmill fuels with spruce, pine bark, sawdust and is optimized to maximize operational availability and low NOx values.

Kiruna is undergoing extensive urban transformation due to the expanding mining industry, while the energy system is being converted to be supplied mainly with waste heat from LKAB in the future. LKAB's ore refining processes generate large amounts of excess heat in the chemical reaction that occurs when magnetite oxidizes to hematite, after which iron ore concentrates are pelletized into transportable balls. The waste heat is part of a larger green transition with the goal of Kiruna being climate neutral by 2025. Existing waste and oil boilers are planned to be replaced gradually. The new pellet boilers will serve as plannable peak and reserve load boilers during the coldest months and as a complement to the waste heat.

AKJ Energiteknik delivers two prefabricated boiler centers to Kiruna for planned reserve and peak load power.

The boilers are delivered as prefabricated modular boiler centers, so-called TPC, (transportable boiler center) with a pellet boiler of 5MW in each boiler center. The boiler centers are prefabricated in the workshop and are made in maximum size to be moved and driven on the road without barriers and police escorts.

The combustion equipment is carried out with AKJ's water-cooled moving grate combustion system for dry biofuels with pellets and is optimized to maximize operational availability and control range.

The contract includes the design, manufacture, assembly and commissioning of complete boiler plants with fuel handling, incinerator, boiler, flue gas cleaning with electric filters, mechanical, piping and electrical installations and control systems.

AKJ Energiteknik delivers 2x10MW bio-oil boilers for dispatchable reserve and peak load power to the district heating network in Gothenburg. This project is a part of a larger sustainability project with the goal of converting away from natural gas and reducing dependence on fossil fuels.

The bio-oil boilers are placed in prefabricated boiler centers called TPC (Transportable Boiler Center). The boiler centers are prefabricated at the workshop in Karlstad and are made in maximum size to be moved and driven on the road without barriers and police escorts.

The boilers will be fired with mixed fatty acid (MFA) bio-oils. There are several sustainability-classified MFA oils based on rapeseed, soy, corn and sunflower. The oils are produced by reusing residual products from, for example, pharmaceutical manufacturing, oleochemical industry and biodiesel production.

The combustion equipment is of low NOx design with a rotary burner. The bio-oil is supplied under low pressure to the inside of a rotating cup which, under speed, atomizes the oil into a mist while combustion air is supplied in several stages.

Resp boiler is equipped with electrostatic precipitator as the boilers are prepared for use more than 500h/year (MCP Directive).

The contract includes fuel handling with 2x80m3 insulated oil tanks, 1st reserve oil tank 50m3, LPG starting device, boiler centers, oil tables, oil burners, hot water boilers, distribution pumps, expansion, pressure maintenance, electrostatic precipitator, chimney, pipes, electrical and control installations. Control cabinet with ABB AC800M controllers, ABB 800xA DCS, master control system.

Knivsta is located between Stockholm and Uppsala and is an expansive municipality where two new sustainable neighborhoods with 15000 new homes are planned. The existing district heating plant produces about 50GWh annually, the plant currently has two biofuel boilers of 15MW and 5MW. The new boiler will replace the 5MW boiler and will serve as a summer and peak load boiler. The goal of the investment is to offer completely fossil-free district heating.

The new bio boiler is delivered in a prefabricated modular boiler house, the so-called transportable boiler house (TPC).

The contract includes the design, installation and commissioning of a complete boiler plant with fuel handling, incinerator, boiler, flue gas cleaning with electric filters, mechanical, piping and electrical installations and control systems.

The combustion equipment is performed with AKJ's dry biofuel combustion system with pellets and wood chips and optimized to maximize operational availability and control range.

Wallnäs sawmill is located in Mariannelund outside Vimmerby and produces about 150000m3sv used in the construction and furniture industry. Wallnäs specializes in timber of larger dimensions. To enable expansion, they are now investing in a new modern fully-automated boiler plant from AKJ Energiteknik where they plan to burn most of the bark.

AKJ Energiteknik is the turnkey contractor for the machine and process equipment. The contract includes design, installation and commissioning of a complete boiler plant with fuel handling with rod feeder, incinerator, boiler, flue gas cleaning with electric filter, mechanical, pipe and electrical installations and control systems.

The combustion equipment is performed with AKJ's wet sawmill fuel combustion system with spruce, pine bark, sawdust and optimized to maximize operational availability and low NOx values.

Installation of a new 8MW wood chip boiler, upgrade and renovation of the existing wood chip boiler from 4MW to 4.8MW, new flue gas condensation 3MW and a new common electric filter. District heating production today amounts to 60GWh, the goal is to upgrade with more power, improved environmental performance and enable continued expansion with an additional 20GWh of fossil-free district heating.

The project is being built in bef premises during ongoing district heating production and currently one phase is in commissioning phase.

The contract includes new fuel feed from crane storage, combustion system with movable grate, hot water boiler, ash discharge, flue gas cleaning with electric filter, flue gas condensation, mechanical, piping, electrical and control installations and upgrade of the bef boiler line.

The combustion equipment is performed with AKJ's moving grate combustion system with advanced controls for moist biofuels and is designed for wood chips, grot and sawmill waste. The plant is optimized to maximize fuel flexibility and minimize emissions.

AKJ Energiteknik is building a new wood chip-fired steam plant that will supply the food industry with steam and district heating in Brumunddal.

Eidsiva Bioenergi is Norway's third largest district heating supplier and in Brumunddal about 30GWh of steam and district heating is produced annually. Steam is supplied to Grilstad, which is one of Scandinavia's largest food industries with a focus on processed meat products. Eidsiva is now investing in a new modern steam plant from AKJ Energiteknik.

The combustion equipment is carried out with AKJ's water-cooled grate system and is adapted for dry to medium moist wood chips. Flue gas cleaning equipment is done with multicyclone and electrostatic precipitator. Fuel feeding will be done with a special fuel system adapted for mobile walkingfloor truck trailers.

AKJ is a turnkey contractor for electrical, mechanical and process equipment and the contract includes design, installation and commissioning of fuel feed, combustion equipment, steam and feed water systems, electrical, control and piping installations, chimney and flue gas cleaning.

The project has been carried out during full production at the sawmill with a high focus on logistics, safty (zero accidents) according to schedule and within budget. Performance >12MW with good emission values.

AKJ Energiteknik was the turnkey contractor for the entire project, which included ground and foundation work, concrete and construction work for a new boiler house and fuel storage, fuel conveyors, incinerator, boiler, flue gas cleaning with electric filters, mechanical, control and electrical installations and heat distribution system for 28MW.

The combustion equipment is designed with AKJ's moving grate combustion system for moist sawmill fuels and has been optimized to maximize operational availability and minimize emissions.

Moelven is one of Europe's largest manufacturers of sawn timber and Valåsen is Moelven's largest sawmill. Valåsen is one of the most high-tech sawmills in the world with a strong focus on digitalization and energy efficiency.

We at AKJ thank Moelven for professional leadership and all suppliers for your strong commitment.

The district heating network is growing in the expansive ski resort. The existing wood chip boiler dates from 2008 and Fjällvärme has now invested in a new modern wood chip boiler from AKJ Energiteknik, while the wood chip boiler is equipped with an electrostatic precipitator. The goal of the investment is to create the opportunity for continued expansion with completely fossil-free district heating.

The contract includes a new wood chip store with bar feeder, fuel conveyor, combustion system with movable grate, hot water boiler, ash discharge, flue gas cleaning with electric filter, mechanical, piping, electrical and control installations.

The combustion equipment is adapted for sawmill waste in the form of bark and chips. The plant is optimized to maximize fuel flexibility and minimize emissions.