600 tonnes of iron in a wood pellet silo
The project at Studstrup Power Station to build a giant silo – which is to hold 65,000 tonnes of wood pellets – demands a great deal of iron and concrete. In fact, around 10,000 tonnes of concrete and 600 tonnes of rebar have been used in casting the walls, and the silo is built on 500 reinforced concrete piles driven 16 metres into the ground.
"Our new wood pellet silo is being cast on site. The walls are 300 mm thick and they are being built up around 600 tonnes of rebar. The steel is supplied in giant nets that have to be bound together with steel wire – by hand," relates Lars Lærkedahl from DONG Energy. Lars is Project Manager for the conversion of Studstrup Power Station.
"It takes three men three weeks to work their way around the silo when they are binding the reinforcement nets together. And they have to go all the way around the silo six times to reach the top. We expect to put the roof on the silo in August, and it will be fully 43 metres high when finished.
DONG Energy expects that the conversion of Studstrup Power Station will be completed during the summer of 2016, allowing the plant to switch from coal to wood pellets in autumn 2016.