INTECH SLOVAKIA s.r.o., esi Trebišov s.r.o., has invested in a 4.0 MW biomass boiler plant with Linka® TWIN straw handling system to ensure an efficient and sustainable energy supply.

The plant utilises local resources such as straw to reduce CO₂ emissions and dependence on fossil fuels.

With advanced technology, including an economiser and an SNCR system, fuel utilisation is optimised, and emissions are kept to a minimum. This investment supports both environmental responsibility and the need for a reliable energy supply for industrial and local purposes.

The boiler plant is a Linka® H 4.0 MW hot water boiler, designed to ensure maximum utilisation of the straw. Additionally, an economiser has been installed with a 2-pass system, which reduces the flue gas temperature from 170°C to approximately 130°C, increasing efficiency and reducing fuel consumption by around 30 kg/h.

The entire firing process begins at the straw storage, where the existing straw crane delivers a straw bale to a 15-meter-long Linka® straw conveyor belt (including straw table, string remover, and inlet), which then transports the straw to a Linka® TWIN bale breaker that shreds the straw bale.

The straw storage and boiler room are separated by a hydraulic safety door, which only opens when the exposed sensor is “activated” on straw bales. The hydraulic safety door is designed to automatically close in the event of a power failure, using its own weight.

The shredded straw is then fed into the combustion chamber using the double stoker auger, which transfers the straw into the boiler and deposits it on the top grate. A small oil burner is also installed for the automatic start-up of the boiler.

The boiler is constructed with a combustion chamber followed by two-pass flue gas tubes and a reversing chamber, which are kept clean using shot valves located at the front and rear.

The flue gas is then routed through a two-pass economizer with vertical tubes and shot valves at the top for cleaning. At the bottom, a rotary valve discharges ash into the augers. The shot valves are 5.5-liter Linka® shot valves, type Chokblaster.

The flue gas from the boiler is directed through a multicyclone, type Linka® 7 x 5, which removes coarse particles. The ash is discharged via a rotary valve into the ash augers. The flue gas is then routed to the existing bag filter, which serves both boilers.

Linka has proven and documented experience with the effective integration of existing components. From the bag filter, the cleaned flue gas is directed to the new flue gas fan before being discharged through the existing chimney. The ash is then transported to an ash container.

Svenska Fönster is one of Sweden’s leading manufacturers of windows and doors, known for its focus on quality, innovation, and sustainability. The company provides energy-efficient solutions for both private and commercial sectors and is actively working to minimize its environmental impact in production.

In 2024, Svenska Fönster took an important step toward a greener future with its investment in a 2 x 4 MW hot water system from Linka Energy A/S, utilizing wood shavings for combustion. The existing boilers are being replaced with new ones, even in limited space conditions, and Linka’s solution can handle both wood shavings and wood chips separately, as well as combine both fuels in a single program.

The system utilizes production by-products as a sustainable energy source, which not only reduces CO2 emissions but also lowers costs related to waste management and energy consumption.

This investment supports the company’s overall goal of improving energy efficiency and minimizing environmental impact, while also strengthening its position as a responsible and sustainable player in the industry.

The boiler system, consisting of two 4 MW Linka H cylindrical hot water boilers, is installed in two boiler rooms and is equipped with Linka’s patented combustion technology, ensuring maximum fuel utilization.

The fuel is transported via augers from the existing intermediate storage tank. As part of the delivery, Linka has taken over the control of the customer’s fuel extraction system, which retrieves fuel from both the wood chip silo and the wood pellet storage with a walking floor.

The process is automatically initiated with a signal from the control system once the boiler’s ignition procedure has been started.

In the boiler’s combustion chamber, a moving step grate is installed to minimize slag formation, and the co-current combustion system is Linka’s own globally patented solution.

The flue gas from the boiler passes through a Linka© multicyclone, type 6 x 4, and then continues to an electrostatic precipitator (ESP), which cleans the flue gas, significantly reducing dust emissions before it is discharged through an existing chimney.

The ash is then transported to the existing ash container.

The system is controlled via a PLC control system, which monitors the system and sends alarms via the internet and SMS. It is also possible to monitor the system via smartphones, tablets, and/or PCs.

A fibre optic cable has been laid alongside the district heating pipes between the central plants, where Linka has connected the alarm system to the customer’s existing system.

The system includes 2 transmission pumps for the connection between the two plants, used to transport heat in one direction, as well as 2 valves to control heat transfer in the opposite direction.

Additionally, 2 distribution pumps with a system shunt are installed at each plant, where the shunt is regulated based on the outdoor temperature.

The system has been upgraded from an open to a closed loop. Linka has provided a pressure holding system and a vacuum degasser for degassing the water.

Jesperhus Resort has invested in a new 800 kW biomass plant from Linka Energy as part of an upgrade to its energy supply.

The existing boiler was outdated and inefficient, and replacing it became a natural step in the resort’s transition toward greener and more reliable heating.

The new system will provide stable heating for the resort’s buildings and facilities all year round. It runs on locally sourced wood chips from Mors, reducing transport distances and CO₂ emissions, while also supporting the local economy and promoting a sustainable energy chain.

The plant is fully automated and continuously adapts to changing heating demands. It requires minimal staffing and is characterised by high efficiency and low emissions.

Biomass is also a financially sound solution, especially considering rising taxes on fossil fuels.

With this investment, Jesperhus strengthens its green profile and secures a future-proof energy supply based on proven technology and local resources.

The complete biomass plant was delivered as a complete turnkey solution, in which Linka Energy dismantled the previous 800 kW boiler and installed a new, modern 800 kW biomass system.

The selected LINKA H hot water plant uses wood chips as fuel and features a cylindrical, three-pass flue tube design, ensuring high efficiency and effective heat transfer. The boiler includes a moving, water-cooled step grate that optimises combustion and reduces slag formation.

Wood chips are delivered to the existing fuel storage (pit), from which Linka’s automated transport system takes over and moves the fuel via a cell sluice and stoker augers. Fuel delivery is continuously regulated by an oxygen sensor, ensuring optimal combustion and demand-based fuel dosing.

The combustion process is controlled by both primary and secondary air supply, which is automatically adjusted to ensure clean and efficient burning with low emissions.

The flue gas is cleaned in a multicyclone and then directed through a frequency-controlled flue gas fan and up through the chimney. The system is equipped with blowdown valves using compressed air, significantly reducing the need for manual cleaning.

Ash handling is fully automated via an integrated stoker auger system, which transports both bottom ash and multicyclone ash to external containers.

The system is managed via an advanced PLC control unit, with remote monitoring and alarm notifications via internet and SMS. The operations team can access the system from a PC, tablet, or smartphone.

Salling Boarding School, known for its commitment to education and community values, is, with the investment in the new straw boiler system, a living example of responsible and sustainable environmental management from the school leadership.

The installation of Linka Energy’s new straw boiler system, replacing the traditional energy source of natural gas in the school, now heats the school’s buildings and provides hot water for both students and staff.

The brand-new biomass plant, a 400 kW LINKA H 400 model with a hot water boiler featuring a movable step grate and equipped with Linka’s patented combustion technology, ensures maximum utilization of the fuel.

The straw boiler system was established in 2023.

The straw is delivered on an 18-meter-long straw conveyor and transported to a Linka® string remover, type 070, where the reeling drum pulls the straw upwards. Subsequently, Linka’s straw suction system transports the straw to our cell lock, where the straw is fed into the straw conveyor and then into the boiler.

A multi-cyclone and bag filter ensure the purification of the flue gas before being released through the new 12-meter-high steel chimney. The ash system ensures, via ash conveyors and screws, that the ash is deposited in an ash container of approximately 2.4m³.

The control of the system is managed through a PLC control system that monitors the system and sends alarms via the internet and SMS. It will also be possible to monitor the system via smartphones, tablets, and/or PCs.

TINE is Norway’s leading supplier of dairy products with more than 30 local dairies across Norway. One of these is located in Elnesvaagen in central Norway.

The dairy needs steam for process heating, and earlier they used gas or electricity to produce the necessary steam. By installing a Linka steam plant the dairy can use wood chips instead and hereby reduce their CO2 emission significantly.

TINE is aiming to reduce their emission of greenhouse gases with 30 % before 2020, by replacing the use of gas and fossil fuels with renewable energy. The new bio plant in Elnesvaagen is part of this objective.

Linka was responsible for designing and installing the complete machine system for the heating plant, which supplies the dairy with heat enough to cover their need for both process and buildings. Every year the dairy uses around 14 million kWh.

The plant consists of a Linka H boiler, which is here adjusted for producing steam. This operates with a maximum pressure of 10 bars and a maximum operating temperature of 176°C.

A 400 m3 wood chips storage is built next to the boiler room. A scraper unit with eight scrapers is installed, from which the wood chips are transported to the boiler by auger. The storage is immersed with an electrical roof, making it easy to refill. The yearly consumption of wood chips is expected to be around 20,000 m3, all from local forests.

Since January 2016 the dairy has only used the wood chips boiler, however a gas boiler and an electric boiler from the previous plant are still available as backup.

Over the past few years, Linka has delivered five bio- mass plants for the Norwegian Defence. Since 2015 Camp Skjold has used heating from biomass, while the latest plant in Bardufoss was commisioned in March 2017. The Norwegian Defence Estates Agency (NDEA) is tasked with maintaining and renewing properties for the Norwegian Defence. A Linka wood chips plant was installed on two of their bases, Bardufoss and Skjold, located in the northern part of Norway, south of Tromsö. The plant in Bardufoss is the fifth and largest plant Linka has delivered to NDEA so far. This makes us the supplier of all biomass plants to the northern military bases.

In the future, a 4,300 kW hot water boiler will ensure heating for the Norwegian soldiers that serve on Bardufoss. The boiler is designed for dry wood chips with a maximum of 40 % water. In addition, a 12,000 kW oil backup and an emergency power generator are also installed. A large wood chips storage with a scraper unit is built next to the boiler room. The automatic feeding system ensures a constant, stabile fuel feed for the boiler. 18 scrapers move the wood chips to a sunken auger from which the fuel is transported to the boiler for combustion. The automatic ash outlet transports the ash from the boiler to an external ash container of 20 m3. The wood chips plant is responsible for heating several barracks along with administration and office buildings. They are all dependent on the heat due to the cold northern weather, where temperatures can drop below -40°C.

The base is located not far from Bardufoss, and is home to the Norwegian engineering battalion. The base consists of six barracks, several gyms, an administration building and a number of additional buildings. NDEA had a 3,000 kW hot water plant from Linka installed in early 2015. The plant also consists of a wood chips storage with a scraper unit and 18 scrapers. These move the chips to a sunken auger, from where the wood chips are transported to the boiler. In addition, a 5,500 kW oil boiler is installed as backup, in case of failure on the main boiler.

Camp Bardufoss
Fuel type: Wood chips
Boiler size: 4,300 kW
Plant type: Hot water plant
Year: 2017