Linka’s fully automated wood pellets system consists of a silo, which is placed inside or outside the building depending on the customer's need. The system is developed to ensure a complete burnout of the wood pellets and efficiencies of up to 96.4 percent.
A biomass plant based on wood pellets usually consists of a silo, which is made from either fibreglass for outdoor installations or fibreboard for indoors. The pellets are transported from the base of the silo by an auger to the boiler room, directly to a cell lock and then into the boiler’s combustion chamber.
The fuel can also be transported from a walking floor system, where a number of horizontal scraper arms move the pellets to a sunken auger, from where it is transported to the boiler by augers.
When the boiler “calls” for fuel the feed procedure is activated, i.e. the feeding augers from the silo will start. The boiler is now provided with the correct amount of wood pellets to accommodate the pre-installed boiler effect. The amount of wood pellets is controlled by an oxygen gauge, which constantly monitors the oxygen percentage in the flue gas.
The H-boiler is a cylindrical, highly efficient channel flue boiler in a 3-pass or 5-pass version, designed for biofuel combustions. 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 utilised to the maximum 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.
Linka has many years of experience in developing the special, advanced combustion technology for wood pellets and other biofuels, and in utilizing the technology optimally in combustion plants with high operational reliability and usability.
Wood pellets are produced all over Europe and are normally delivered from day to day. We are happy to help you decide the optimal storage size based on our plant size, operational need, etc.
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.
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.
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 trimming, and in the event of a disruption.
Our highly qualified project managers are ready to consult and advice you about the best energy solution based on your specific needs.
The biomass plant at Tversted needed to fit a specific size restriction, due to their location in a residential area. Therefore Tversted chose a wood pellet plant, with a very limited operating need.