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Linka - Model 400 - 15,000 kW -Straw Pellet Steam Plant
The difference is the design of the boiler, which is here made to produce steam. A straw plant consists of a straw cutter or the well-known Linka shredder. When shredding the bales, the straw will be moved upwards. This means that stones and other foreign objects are separated from the straw, and can later be removed from the shredder. The shredded straw is transported from the shredder through a closed pipe system, or by auger, directly to the boiler room, where it passes through a cell lock before being fed into the boiler’s combustion chamber by an auger. A conveyor, adjusted for the size of the boiler and the customer’s needs, is also installed. 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 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 110° 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 chips and other biofuels, and in utilizing the technology optimally 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.
- Plant type: Steam
- Fuel type: Straw
- Plant size: 400 - 15,000 kW
- Efficiency: Up to 95.9 %