Linka’s fully automated wood chips system is here adjusted for producing steam. The efficient combustion still ensures a complete burnout of the wood chips and efficiencies of up to 96.7 percent.
Linka’s steam system is largely identical with our hot water system. The difference is the design of the boiler, which is here made to produce steam.
A wood chips plant is usually designed with a walking floor system. The horizontal scraper arms move the wood chips to a sunken auger and the end of the system. This auger is monitored by a photo cell, which will active the system whenever the sunken auger is empty.
On larger plants the wood chips can be handled by crane. Here a travers crane with a wood grip is installed in the storage, which grabs the wood chips and transports it to a funnel in front of the boiler. The funnel is installed with a hydraulic piston that pushes the wood chips into the boiler.
The steam boilers are delivered in a number of standard sizes. When calculating steam output, the boiler’s efficient output in kW is multiplied by factor 1.56 to get the boiler’s steam output in kg/h. As an example, an 800 kW boiler will produce 1,250 kg steam per hour.
The plants are delivered for various steam pressures spanning from 0,9 to 16 bars.
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.
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 chips and other biofuels, and in utilizing the technology optimal in combustion plants with high operational reliability and usability.
It is possible to add an economizer, which will cool the flue gas, boiler fittings and pump unit.
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 maintenance, 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.
Linka installed a 3,000 kW steam plant that supplies TINE’s local dairy in Elnesvaagen. The dairy has reduced their CO2 emission significantly by using steam from wood chips.
In 2017 our British partner, Manco Energy, installed a steam plant at a dairy in Scotland. The dairy is now producing steam from CO₂ neutral biomass.