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The installation and commissioning of the Portasilo equipment was completed with no disruption to the normal operation of the plant.The advanced system devised by Portasilo fulfils our requirements and is currently delivering increased volumes of biomass into our new burners.
Ferrybridge power station refers to a series of three coal-fired power stations situated on the River Aire near Ferrybridge in West Yorkshire, England
Keen to increase the proportion of biomass used in its boilers at Ferrybridge Power Station, Scottish and Southern Energy wanted to introduce state-of-the-art burners and automated handling to store and convey wood pellets around the plant.
Portasilo developed a tailored system for the specific challenges of the Ferrybridge site. Biomass wood pellets are delivered into tipping booths, from where six Portasilo Augerflo variable-speed feeders transfer the product into a pipe conveyor. This fully enclosed conveyor protects the volatile pellets from moisture and is ideal for transporting material over long distances. After travelling for half a kilometre, the pellets are deposited into a 5,000m³ intermediate storage silo.
Because of the material’s potentially explosive nature, Portasilo fitted more than 120m² of explosion-relief vents to the silo roof, ensuring it meets ATEX requirements.
The silo is fitted with an advanced hydraulically driven rotating screw extractor, which sweeps the 14-metre base to collect material from the full silo cross-section. A chain conveyor then feeds the pellets into another pipe conveyor, which transports the material to the boiler house.
Here, two Portasilo 900mm-diameter screw conveyors feed the pellets into two five-metre diameter day-silos. From here, biomass is transferred into six disc mills that feed the new burners. To enable the feed rate from the day-silos to be independently variable, Portasilo Osciflo bin dischargers were used, giving a variable discharge rate of between 0.4 and four tonnes per hour into the mills.
The complete solution from Portasilo included all platforms and supporting steelwork, as well as full-length gantries along the pipe conveyors to provide maintenance access.
© Portasilo Limited 2015 Portasilo Head Office: New Lane, Huntington, York, YO32 9PR +44 (0) 845 60 11 276 Company Registration No 525808 (England & Wales)
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