District heating

Straw heating plant: 1.000 - 15,000 kW

A straw based heating plant is developed in various constructions customized to the customer's need. Usually a straw shredder or cutter is attached, depending on boiler size, etc. You can use Linka as a supplier of the plant or as a turnkey contractor for the entire system.

Heating plant for straw

Linka’s steam system is largely identical with our hot water system. The plants are delivered for various steam pressures spanning from 0.9 to 16 bars.


Plant type: Heating plant
Fuel type: Straw
Plant size: 1,000 - 15,000 kW
Efficiency: Up to 95.9 %

Linka H-boiler – for straw

The H-boiler is a cylindrical, highly efficient channel flue boiler in a 3-pass or 5-pass version, designed for biomass combustion. The boiler features a smooth flame channel and water-cooled rotation chambers. It is dimensioned to achieve full combustion and efficient utilisation of the radiated heat in the flame channel, whilst convection heat is maximum utilised in the subsequent flue gas sections.

A moveable, water- and air cooled step grate is installed in the front of the boiler, to prevent clinker. Through our world patented combustion system, secondary air is added to the process in a downstream principal, to create the correct amount of turbulence in the combustion area. Hereby the developed gasses are completely burned,

resulting in higher efficiencies and better values on emissions. Thorough insulation of the boiler with 100 mm mineral wool results in a minimal heat loss. The boiler is all-welded and gas tight, and delivered with flanges, connecting branches, counter flanges and safety outlets. A cleaning hatch at the backend of the combustion chamber makes inspection and cleaning easy.

The standard version is designed for hot water with an operating pressure of 4 bar, and a maximum operating temperature of 110⁰ C. The H-boiler can be designed for High Pressure Hot Water with a temperature of eg. 160º C, and adjusted for a pressure of eg. 10 bar.

An elegant exterior of blue plastic coated steel plates gives the Linka H-boiler an appealing, modern design.

Automated usability

Linka has many years of experience in developing the special, advanced combustion technology for wood chips and other biofuels, and in utilizing the technology optimally in combustion plants with high operational reliability and usability.

You choose the collaboration

You can use Linka as a supplier of the plant or as a project collaborator, with us as the turnkey contractor for the entire system.

Automatic ash extraction

A stainless steel, laterally-mounted ash auger is fitted in the base of the boiler, to transport the ash out to the inclined auger. This auger moves the ash onwards to an ash container, e.g. outside the building.

Automatic flue pipe cleaning

A number of pressure tanks are mounted on the boiler along with soot valves. These inject air into the boiler’s flue pipes to keep them clean. This way, manual cleaning of the pipes is rarely necessary.

Electronic control and surveillance system

Control and surveillance of the plant is based on a PLC control system (Programmable Logic Controller). This ensures controlled regulation of fuel supply to maintain maximum heat production from the boiler. All set points are readable and can be adjusted on a touch screen display. The oxygen percentage can also be read simultaneous on the display. Furthermore there is an alarm outlet on the control system.

The control system can also be connected to the internet and accessed by computer, tablet or smartphone. This enables you to receive remote support from Linka during commissioning and maintenance, and in the event of a disruption.

The PLC system can be installed with a general SCADA system, and data from the control system can be transferred to your computer, tablet or smartphone, enabling you to surveillance the plant from your desk. There are several options for control and surveillance of your plant based on your needs.

Related solutions

Boulstrup-Hou Heating

In 2016 Boulstrup-Hou needed to expand their capacity, and once again Linka was chosen as the turnkey supplier of complete new 2,000 kW straw plant.

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Lolland Heating

In 2013 Linka installed a boiler line at the straw plant in Nakskov, complete with a 6,500 kW boiler, straw cutter and control system. The boiler line is part of the plant’s overall supply.

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Hjallerup District Heating

As a supplement to solar heating Hjallerup had a fully automated 3,000 kW straw plant installed. The change to biofuel has already reduced the prices for district heating in the area.

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