The plant is planned as backup for a peak load district heating plant, and will increase the existing plant’s capacity to 120 MWth.
In the new plant, heavy fuel oil will be replaced with biomass fuels including wood pellets and briquettes, bark and forest residue pellets, dried forest residues, agrofuel pellets and peat pellets. Coal will be used as a reserve fuel.
The plant will be designed to comply with the emissions requirements of a new environmental permit.
The scope of work includes the supply of a 90 MWth biomass pellet dust boiler and auxiliary equipment, modification of the existing oil fired boiler to 30 MWth wood pellet firing; delivery of storage silos and handling equipment for biomass fuels, flue gas cleaning systems and stack; modifications to the boiler house; electrification; and instrumentation and automation to be installed and commissioned.
Work is set to begin this spring, Amec Foster Wheeler said, with handover to Seinäjoen Energia Oy and commercial operation expected in December.