BillerudKorsnäs, a leading manufacturers of packaging paper, upgrades the evaporation plant at its Gruvön pulp and paper mill in Sweden. The installation of the new equipment is scheduled for spring 2018.
According to the announcement, the company placed an order with Valmet to convert the existing evaporation train from using medium-pressure steam as today’s heating media, to become essentially low-pressure steam driven. The upgrade is expected to optimize the overall steam balance at the Gruvön mill by making medium pressure steam available for the mill’s new liquid board machine that will be installed at the mill. The value of the order will not be disclosed, but the technology provider typically values this kind of projects below EUR 15 million.
New equipment to be installed includes a TUBEL evaporator, two Tube Evaporators, two liquor preheaters, and Valmet’s patented LP-steam boosting system. A substantial upgrade of the piping system will also be performed as part of the plant upgrade.
The evaporation plant in a mill concentrates black liquor from the pulp cooking process. From the evaporation plant the evaporated water is brought back to the pulp process in order to minimize mill’s water consumption. After evaporation the concentrated black liquor is fired in the recovery boiler for steam generation and recovery of cooking chemicals.
Earlier BillerudKorsnäs invested into a new brown stock washing sideline at its mill in Sweden.
The company is one of the leading manufacturers of packaging paper made from virgin fibers. It is headquartered in Solna, Sweden and emerged in 2012 from the merger of Billerud and Korsnäs and Voith Paper is a division of the Voith Group.