I-001-FI-014-EN
mml
● ● ● Particularity : efficient on-site use of wood waste from the wood products industry.
The wood energy Trail
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Saint Julien sur Suran : on-site use of the wood waste produced by a wood turner Putting wood waste to good use
Information on the community
As part of its renovation and restructuration programme, and to valorise the large amount
• Altitude : 400 m, • Population : 460 inhabitants, • Forest : 595 hectares.
Photo AJENA
The boiler plant and the workshops
Removing debris from a woodworking machine by vacuum
Programme of the Jura Department
of waste wood it produces every year (around 1,200 m3), the company AS’BOIS decided to invest in an automatic wood-fired boiler. The company specialises in wood turning and cutting, and currently employs thirteen people. The company’s workshops and the director’s home nearby are heated by the boiler. Before the boiler was installed, the waste produced was burned in an old stove and the heat went to waste. The site was heated by a manually-fed boiler, which burned the large bits of wood that were otherwise unusable, and an oil-fired boiler for the workshops. Thanks to the new boiler, there is no longer the need to dump the wasted wood which cannot be got rid of or burned it in the open, which pollutes the local environment.
The fuel used is made of acacia, oak and beech shavings, and sawdust. The maximum granulometry is 4 x 2 x 1 cm and the moisture content is under 25 %. The waste produced at each workbench is removed through a vacuum system to be collected in two silos (see photo opposite). The lower silo, which measures 150 m 3 (5 x 5 x 6 m) can confortably hold two months’ worth of wood waste collected over the summer when the boiler is extinguished. This silo is equipped with three hydraulic jacks to remove the fuel to two worm screws, which then transfer it to the boiler itself. The company produces a tonne per working day, enough to cover the heating needs for the entire year.
A self-operating boiler The boiler, made by La Jurassienne, has an output of 400 kW, its combustion system is an underfeeder screw. A cyclone removes the dust from the smoke. The ashes are removed manually, and the small amount of ashes produced is taken to the Saint Julien municipal dump. The boiler supplies warmth to three buildings linked to a 114 metre long underground heating network. The extant manufacturing unit, an extension to this containing wood stabilisation facilities, and a house already benefit, and the output of the boiler is sufficient to permit the addition of a wood drying facility to the network.
© ITEBE- july 1999
Photo AJENA
Fuel supply