Valmet to deliver a new fossil fuel free lime kiln and a fibre line upgrade for SCA Obbola kraft liner expansion project in Sweden
Espoo, Finland - Valmet will deliver key technology for the start of a major upgrade of the SCA Obbola mill’s pulp production in Sweden which is aiming to increasing kraft liner output over the next five years.
SCA’s is targeting an annual production increase of kraft liner in its Obbola mill from the current 450,000 tonnes to 725,000 tonnes per year. The total investment amounts to approximately EUR 700 million over a five-year period.
Valmet’s delivery includes a new fossil fuel-free lime kiln and upgrade of the existing fibre line. The pulp production upgrades will occur in stages. The upgraded fibre line will start up in June 2021 and the new lime kiln is scheduled to start up during the last quarter of 2021.
While the value of the Valmet order is not being disclosed, a project of this size and scope is typically valued at around EUR 50 million.
“With the investment in Obbola mill, we can meet the increased demand for sustainable packaging. We selected Valmet to deliver new technology for our pulp mill upgrade as we have had good experiences with Valmet technology at both our Obbola mill and other SCA mills,” said Per Stand, project director for SCA.
The new lime kiln system delivered by Valmet replaces two older, oil-fuelled lime kilns and will have a daily capacity of 220 tonnes burned lime. The solution includes the OptiDisc lime mud filter, flash dryer for lime mud drying, high efficiency rotary cooler and a full wood powder firing system for the lime kiln, including storage and grinding of wood pellets. This solution makes the lime kiln 100% fossil free.
The fibre line upgrade includes a new hot stock refining after the digester using Conflo refiners. The brown stock washing will be improved by adding a new TwinRoll press as a last washing stage before the storage towers for the paper machine. As a result of the fibre line upgrade, the daily capacity will increase from the current 850 air dry tons to 1,100 air dry tons. The capacity increase is done with improved washing with the same water consumption.
“This order strengthens our cooperation with SCA. Delivering fossil fuel free lime kiln solution is very much aligned with the strategies of both our companies. SCA valued our technical leadership in lime kilns as well as robust and reliable solutions both for the lime kiln and fiber line,” said Valmet’s Bertel Karlstedt, pulp and energy business line president.
SCA offers paper for packaging and print, pulp, wood products, renewable energy, services for forest owners and efficient transport solutions. In 2018 SCA had approximately 4,000 employees and sales amounted to approximately EUR 1.8 billion. SCA was founded in 1929 and has four pulp and paper mills in Sweden. In September 2019 SCA announced its plan to build a new paper machine for the production of kraftliner at its Obbola paper mill in Umeå.