Valmet to supply boiler upgrade and flue gas cleaning to Stora Enso Anjala-Ingerois
Finland-headed forest industry and energy technology provider Valmet Oyj has announced that it will supply a boiler upgrade and a flue gas cleaning system to global forest industry major and compatriot Stora Enso’s Anjala-Ingerois sites in Finland. The goal of the investment is to reduce emissions and to ensure flexible use of different fuel mixtures in heat production, as well as to achieve better boiler performance and higher boiler efficiency.
Last month, Stora Enso announced that it will invest EUR 21 million to improve the competitiveness and environmental performance of the Anjala-Ingerois production sites in Finland. The goal of the investment at Anjala paper- and Ingerois board production sites is to reduce emissions and to ensure flexible use of different fuel mixtures in heat production.
We are looking for a new wider operation range with better operational performance, high reliability and compliance with future emission limits. We believe in Valmet’s capability to deliver the boiler upgrade which will meet our requirements, said Ari Pöntinen, Manager, Investments and Operations Development, Anjala Mill, Stora Enso.
Valmet’s delivery includes an upgrade to an existing 110 MWth biomass and solid recovered fuel (SRF) fired bubbling fluidized bed (BFB) boiler. Maintenance types of replacements will be part of the work. The air emission control system modification includes an efficient new baghouse filter with additive feeding.
According to Valmet, the value of this kind of boiler rebuild is typically around EUR 15-20 million. The boiler outage is scheduled for the third quarter of 2022, but the installation work of the new baghouse filter will be done mainly before the shutdown. The project’s focus has been on finding ways to minimize the boiler shutdown time.
The upgrade will significantly extend the boiler’s lifetime. Many of the modifications include new waste-to-energy features to make the existing boiler more suitable for using solid recovered fuel. At the same time, modifications and replacements will improve availability, secure safe operation, and reduce maintenance costs, said Jouni Koskinen, Senior Manager, Sales, and Technology, Rebuilds and Conversions, Valmet.