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Metso Paper supplied rebuild for Stora Enso Nymölla PM 1 started up in Sweden

Nymölla PM 1 project group after a successful start-up. From left, Marko Vestola, Project Manager, and Jaakko Lattu, Erection Supervisor, both from Metso Paper; as well as Roland Stjernberg, Project Manager, Jouni Wallin, Mechanical Supervisor, and Lennart Thomasson, Mechanical Maintenance Engineer, from Stora Enso Nymölla.

Stora Enso's Nymölla PM 1 in Sweden has been succesfully started up on September 16, 2007 after a headbox rebuild. The delivery also included cross and machine direction profile control upgrades delivered by Metso Automation, modifications of the approach system, and new SymRun Plus blow boxes for the dryer section. The main target of the rebuild was to improve the cross direction profiles of the paper produced.

In the shutdown the machine's existing headbox was rebuilt with RetroDilution dilution control equipment. The Metso Paper developed RetroDilution upgrade is a cost-effective way to transform an existing slice lip controlled headbox into a dilution controlled one. RetroDilution upgrade gives very uniform basis weight and fiber orientation profiles, improving the end product quality and machine runnability.

The Nymölla PM 1 produces uncoated woodfree paper with a basis weight range of 70-160 g/m2. Nymölla's brand MultiCopy has been produced on PM 1 since 1977. The machine has a wire width of 7.2 m and a design speed of 1,100 m/min.

The Stora Enso Nymölla mill has two paper machines, both supplied by Metso Paper, and they produce office and envelope papers and paper for the graphical industry. The mill, located in the southernmost part of Sweden, produces approximately 450,000 tons of paper and 330,000 tons of pulp annually and employs approx. 800 persons.

For more information, please contact: Marko Vestola, Project Manager, Paper and Board Machines, Metso Paper Tel. +358 40 517 6920, marko.vestola@metso.com