Grinding of biomass wood pellets for district heating production
The modernization of the Västhamnsverket biomass power plant in Helsingborg, Sweden, marks a significant milestone in sustainable energy production. Through the collaboration between Öresundskraft, Mitsubishi Power Europe, and Tietjen Verfahrenstechnik GmbH, the plant’s lifespan has been extended by an additional 20 years, while its operational efficiency has been significantly improved.
Biomass Wood Pellet Power Plant
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Originally commissioned in 1982, the Västhamnsverket power plant has a total capacity of 210 MW and uses wood pellets as fuel. As part of the modernization, Tietjen was responsible for the planning, delivery, installation, and commissioning of the fuel preparation system.
The Tietjen scope of supply included:
- pellet storage
- grinding modules with the GDL 25 hammer mill, the air-gravity separator AGS as a feeder for the hammer mill and pneumatic transport and total separators
- central distribution to buffer silos
- dosing to twelve burners
- spark detection and suppression as part of a constructive explosion protection concept (ATEX)
- required steel structures.
Wood pellet fuel preparation
The fuel preparation system consists of three independent grinding modules, with one module always on standby. These modules grind the wood pellets into wood dust of a defined particle size. The wood dust is then transferred to a central trough chain conveyor, which distributes it to the buffer silos in front of the burners. These silos ensure continuous burner operation, even during interruptions in pellet supply.
