OUT WITH THE OLD, IN WITH THE NEW – IN JUST ONE DAY
Contracts were signed in the spring of 2018 and the project commenced with the delivery of the pre-evaporation units. The installation of the units was completed by November 2018 and commissioning and take-over was achieved in April 2019. The recovery boiler project proceeded immediately after the installation of the pre-evaporation plant, the hydrotest was completed by late December 2019, with take-over taking place at the end of July 2020.
“This was an extremely challenging project for a number of reasons,” says Wikstedt. “The mill layout was really tight, with the recovery boiler being constructed on the site of the former lime kiln. There were also challenges with the pre-evaporation unit which involved a complex layout in an extremely narrow place.
“Added to this were Austrian rules relating to the use of labor and then of course there was Covid-19, which came along right in the middle of the main part of the project.”
Despite all the challenges, the project started on time. The new recovery boiler took over from the old one and was running at nominal capacity after just one day. “This project was carried out on another level, especially when it came to safety,” says Leitgeb. “And the start-up was brilliant. The project manager and team from ANDRITZ were completely focused and always pushing to make sure all requirements were met, and the timeline was followed.
“We stopped the mill for one day and the next day we had full production. There was such a fast ramp up after the start-up, I could even say the recovery boiler was outperforming. We did all this during normal operation, it really was a case of out with the old and in with the new and up and running again – in just one day.”
“We were very pleased, the commissioning went well and the start-up and ramp-up to full production went exceedingly well.” adds Wikstedt.