Aker Kvaerner to modernise board mill in Sweden

Kvaerner Power has signed a contract for the supply of equipment, machinery and services to Stora Enso’s Skoghall Mill in Sweden, worth a combined total of more than EUR 100 million. Stora Enso is modernising its Skoghall board mill located in central Sweden to make it more cost-effective and environmentally friendly. Kvaerner Power will supply a new RECOX(TM) recovery boiler rated at 2200 tons dry solids per day. The mill’s present evaporation plant will be replaced with a new EVAPSTM evaporation plant from Kvaerner Power. It is designed for evaporation of black liquor and liquor from the CTMP process and the total evaporation capacity will be 750 tons of water/hour. The plant will use TUBEL® technology as well as conventional falling film
technology. Skoghall mill’s strong odorous gases will be burned in Kvaerner Power’s NCG treatment system (Non-Condensable Gas) whereas weak gases will be burned in the new recovery boiler. The mill’s existing oil fired boiler will be converted to a bubbling fluidised bed boiler to burn biofuels such as bark, forest residue and sawmill waste. The new power boiler will produce energy for the mill’s processes with a thermal capacity of 136 MW. The recovery boiler and evaporation plant will be completed by autumn 2005 and the power boiler conversion will be commissioned in the summer of 2006.

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