Experimental research on the combined contact-impingement drying of paper on the dryer cylinder

Oleg Timofeev, Janne Keränen, Nenad Milosavljevic, Risto Talja

Research output: Contribution to conferenceConference articleScientific


Combined cylinder-impingement drying will improve the drying rate of paper and it has also positive effect on paper quality. This paper reports the latest findings of experimental and numerical simulation work. A dynamic laboratory-scale test rig, equipped with an air-heated cylinder having diameter of 400 mm and an impingement hood, was constructed to study combined cylinder-impingement drying. Paper temperature distributions in thickness-direction and evaporation rates were determined. Three cases were compared: conventional cylinder drying, impingement through the fabric and combined cylinder-impingement drying. The combined drying yielded the highest drying rate. Due to impingement, the paper temperature decreases compared to the conventional cylinder drying. This implies better utilisation of the heat from the cylinder, which was also measured. The computer simulations confirmed the experimental results.
Original languageEnglish
Number of pages8
Publication statusPublished - 2002
MoE publication typeNot Eligible
Event13th International Drying Symposium, IDS 2002 - Beijing, China
Duration: 27 Aug 200230 Aug 2002


Conference13th International Drying Symposium, IDS 2002


  • paper
  • papermaking
  • paper machines
  • drying
  • impingement drying
  • cylinders
  • drying rate
  • simulation
  • paper quality

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