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

    Abstract

    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

    Conference

    Conference13th International Drying Symposium, IDS 2002
    CountryChina
    CityBeijing
    Period27/08/0230/08/02

    Keywords

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

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