Valmet Air Dryer Nozzles* cut air dryer energy consumption by close to 20% at Ishinomaki.
*earlier known as PowerFloat Plus
After the installation, we achieved an energy saving of close to 20% with the air dryer through improved drying efficiency. Sheet runnability was also improved and the distance between top and bottom nozzles could be made 20-55% narrower than with the old type of nozzles."
Hideyo Yamaguchi, Assistant Manager of the Paper Production Department
Summary
Location
Nippon Paper Industries' Ishinomaki Mill PM N6, Japan
Customer challenge
Air dryer drying capacity was reaching its limits at normal operation speeds. Sheet edges were unstable and lumps of dried coating color caused sheet breaks and defects. The target was to increase drying capacity, to reduce dryer energy consumption by 10% and to stabilize the runnability of web edges inside the dryer.
Solution
Valmet suggested installing a new type of energy saving nozzle on the dryers. Valmet Air Dryer Nozzles were installed in September 2014.
Results
Dryer energy consumption decreased by close to 20% and drying capacity was improved. Sheet runnability was also improved and the distance between top and bottom nozzles could be made 20-55% narrower than with the old type of nozzles.
Keywords
Board and paper, rebuilds and upgrades, Asia-Pacific
