Before the investment the flash dryer had one wet stage and two dryer stages for drying of the BCTMP pulp before baling it. As one part of the total investment package of about 50 MSEK, the flash dryer has been equipped with additional air to air heat exchangers to pre-heat the air from the two dryer stages. The previous wet stage now acts as a dryer stage, making the flash dryer a three stage flash dryer. This has increased the capacity by about ten per cent.
"During week 40 we prolonged our usual 24 hour maintenance stop with one day and the installation of the air to air heat exchangers in the flash dryer was done during 48 hours," says Michael Nylander, Mill Manager at Waggeryd Cell. "Installation as well as the start-up have been very successful. In addition to the production increase, the propane consumption has been reduced, which is very positive."
"The aim with the investment has been achieved and we have increased our already very high efficiency even further. This strengthens our competitiveness on a tough market," Michael Nylander ends.
Andritz is the supplier of the new air to air heat exchangers and was responsible for the rebuild.