18 ANDRITZ
Pulp Paper & Logistics
from forest to final products, was needed before we could embark on such an ambitious project.” In January 2014, a feasibility
study was conducted with the results being presented six months later, after which the go ahead for the pre-project study was given. Around 45 people worked on the pre-project study, which covered every conceivable area that the Helios project might affect. “We looked into every single aspect, not just the processes. We looked at market conditions, the quality aspects, the supply situation, and the wood logistics,” says Ekebro. “We needed to be sure we were aware of all the impacts that would occur with such an expansion at the mill.” Håkan Wänglund, general project manager for Helios, says: “It is, of course, during this pre-study when
May/June 2019
we have lots of discussions with suppliers. While we know how to run a pulp mill, we obviously don’t have the experience of what is latest on the market, and what new technology we should be looking at to maximise the project’s success. This is where knowledge and the latest in technology and processing experience from Andritz was vital.” Ekebro adds: “The discussions with suppliers during the pre- project study were extremely important for us because that is when we set the framework for the design.”
The latest process for low energy and chemical consumption Andritz was chosen to supply its very latest technology to four key
areas of the Helios project; wood processing, pulp drying, the white liquor plant and the recovery boiler. “Andritz was selected as a supplier because of its excellent technology in these process areas,” says Ekebro. “In particular, we searched for the latest- designed processes that have low energy and chemical consumption and very high productivity.” New technology for the Helios
project included the latest Andritz HQ-Presses in wood processing, new technology for burning wood dust in the lime kiln, a new state- of-the-art EvoDry Pulp Drying System and, finally, the skill and expertise to expand the recovery boiler.
Henrik Grönqvist, project
director at Andritz for Helios, says, “We have always had the
utmost respect for SCA’s spirit of willingness to try something new, and in the Helios project we brought in some of our latest and most exciting technology, which has been designed, at its very heart, to improve performance all around, but particularly in reducing energy use across the mill.
“In terms of our very latest
technology installed at SCA Östrand, on the wood processing side we have the Andritz HQ- Presses, which cut down energy greatly when it comes to burning bark in the boiler. In the white liquor plant, we have eliminated the use of fossil oil in the lime kiln by installing new technology that burns wood dust instead. The EvoDry Pulp Drying System has many new groundbreaking innovations, but in the Helios
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