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RENEWABLE FUEL INDUSTRY NEWS


Christer Kjellberg, Head of Projects at Mjölby-Svartådalen Energi.


The fuel for the plant comes from within a 30 km radius.


M-SE’s management had already conducted feasibility studies for a biomass CHP plant beginning in 2008 with a pre- study. “We did a lot of work and had many discussions,” Kjellberg explained. “It was in 2012 when serious discussions were taking place and then the final decision came in June, 2013.” M-SE issued a tender to six companies for a new biomass power plant that would use wood chips, forest residues and sawdust as fuel. Design capacity was to be 35 MW for heat, and 10 MW of electricity. “We knew what we wanted from the start,” stated Kjellberg. “We provided a scaled-


down sketch of how we wanted the new plant to look and made a 3D model of the building before we sent out the tender.” During the tender process, M-SE visited two important Andritz references in Sweden (Söderhamn and Bollnäs). Andritz was selected to supply almost the complete plant except for the ground and civil work for the foundations, as well as an HV cubical after the turbine. The contract was signed on 12 September, 2013. The Andritz teams in Austria and Finland supplied the 35 MW EcoFluid Bubbling Fluidized Bed (BFB) boiler and the external


fuel systems, whilst Andritz Automation in Austria delivered the low voltage equipment and the ABB control system.


“Everything that is visible above the ground in the new plant came from Andritz,” said Christian Lackinger, Andritz Project Manager. “The rest was civil works carried out by a Swedish company. We delivered the BFB boiler, fuel handling system, flue gas cleaning system, steam turbine with auxiliaries and the electrical systems.”


The fuel for the plant comes from within a 30 km radius and is predominantly in the form of waste from the forest, but also


includes wood chips, bark and sawdust. Occasionally, logs are bought and a local contractor produces chips from the logs in the CHP plant’s woodyard. The fuel handling system supplied by Andritz includes equipment to receive 400 cu m/h of biomass, all screening, storage up to 4,000 cu m and conveyor systems to feed the boiler.


Challenge


“The actual construction of the plant was quite a challenge,” declared Kjellberg. “The ground here ranges from hard rock to bottomless clay and there was a challenge building a new plant


Winter 2016 9 9


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