VERFAHREN ZUR HERSTELLUNG EINER FASERSTOFFBAHN

    公开(公告)号:EP3359733A1

    公开(公告)日:2018-08-15

    申请号:EP16766279.0

    申请日:2016-09-14

    申请人: Andritz AG

    IPC分类号: D21F11/00 D21F11/14

    摘要: The invention relates to a method for producing a fibrous material web (9), particularly for producing a tissue or hygienic paper web, in which a fibrous material suspension is dewatered in a twin wire former (18) to obtain a fibrous material web (9), and said fibrous material web (9) is dried with the aid of a TAD dryer (19). After the twin wire former (18) and before the TAD dryer (19), a pre-dewatering device (20) is provided which comprises a hood (17) and a suction roller (16), a hot fluid flow passing through the fibrous material web (9) that is embedded between one covering (3, 4, 5) on each side. The covering (5) between the suction roller (16) and the fibrous material web (9) is a felt (5), and the covering (3, 4) between the fibrous material web (9) and the hood (17) is a screen (3, 4). In said pre-dewatering device (20), a specific volumetric fluid flow greater than 100 m
    3 / (m
    2. min), particularly greater than 200 m
    3 / (m
    2. min), and preferably greater than 250m
    3 / (m
    2. min) is sucked through the fibrous material web (9).