Voith to modernise PM at Stora Enso Kvarnsveden mill in Sweden
HEIDENHEIM, Germany, June 20, 2008 (Press Release) - Stora Enso, the world's largest paper and cardboard producer, placed an order with Voith to modernise the PM 11 in Kvarnsveden with Voith components. The PM 11 produces newsprint from TMP in a basis weight range between 38 and 49 g/m². At a speed of 1,600 m/min and a paper web width of 8,700 mm at the Pope reel, 270,000 tons of paper have been produced every year.
The target of the rebuild project is an increased production by higher availability of the machine, which is achieved by a reduction of the losses during the reel-spool change and a safe and quick transfer.
The modernising includes components of the EcoChange CA reel-spool changing system, and the threading solutions with TailBlade and the Prevo product family.
During a small rebuild at the reel-up system in December 2007, brushes had been installed which are pressed against the paper roll when a parent roll is decelerated. Thus, broke at the outside layers could be reduced by 90 % to just a small number of layers.
To exploit further optimisation possibilities, Voith's EcoChange CA reel-spool changing system will be installed into the existing pope reel of the PM 11. With the help of this EcoChange CA, the changing efficiency will be improved and changing losses will be minimised.
The TailBlade serves for ropeless threading into the double-tier dryer section. With the TailBlade solution, the threading tail is transported reliably from dryer to dryer with the help of blow air.
The main components for threading the paper tail through the hard-nip calender consist of four PrevoThread C threading belts. These compact vacuum threading belts with Venturi technology permit optimal threading for pick-up, separation and transport of the paper web. The paper tail is picked up and fixed on the belt of synthetic wire with the help of a vacuum. It is transported safely to the following position with every paper and in every position in the paper machine.
With this modernisation, the PM 11 receives a considerable potential regarding production increase and reliability.
