Effective Newsprint production with an ultra-low energy consumption

I projektet har energiförbruket reducerats i primärraffinren genom tillsats med en kemikalieblandning som består av natriumhydrosulfit, natriumkarbonat och stabilisator. En liknande kemikalie används sedan tidigare för att bleka massan och i raffinören uppnås förutom reducerat energiförbruk också blekning med ca 10 ljushetsenheter. I den senaste perioden har flera studier i projektet visat att det finns potential att reducera energiförbruket avsevärt genom att förbättra reningen av processvattenet. Genom att minska mängden fyllmedel som når pannan kan energiförbruket både i utstyret som renar processvattnet och i pannan minskas. Samtidigt så blir processvattnet som går tillbaka till pappersmaskinen renare och det minskar energiförbruket indirekt samtidigt som fabriken sparar mycket ekonomiskt på förändringarna.

The underlying idea of the innovation is to produce a new and cost-effective newsprint grade with a significantly reduced energy consumption during production and a superior printing performance, in order to increase product margins and maintain Norske Sk ogs position as one of the leading paper producers in environmental performance. To achieve the project goals, major changes must be done in the current up to date papermaking process at Norske Skog Skogn. The project is ambitious and challenging, as tod ays newsprint furnish composition will be modified beyond known limits. The project aims to reduce the overall energy consumption in all process steps in newsprint production; Reduced energy consumption in mechanical pulping and reduced energy consumptio n in the papermaking process. This project will be in the research front when it comes to high filler containing newsprint and the overall ultra-low energy consumption will strengthen Norske Skogs position as one of the international leading paper produ cers in environmental performance. In a market with over production of newsprint, this will give Norske Skog huge competitive advantages when it comes to environmentally friendly newsprint production.