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    • 94. 发明公开
    • APPARATUS AND METHOD FOR WASHING PULP IN A ROTATABLE DRUM
    • 装置及方法细胞物质的旋转滚筒洗衣机
    • EP2147148A1
    • 2010-01-27
    • EP08779277.6
    • 2008-04-25
    • Metso Paper, Inc.
    • LUNDBERG, Jörgen
    • D21C9/06B01D33/067B01D33/09B01D35/16
    • D21C9/06
    • An apparatus and a method for washing pulp in an washing apparatus comprising a rotatable drum (102, 602) provided with a number of outer compartments (104, 604, 606) for the pulp (418, 622, 624), which are defined by compartment walls, where the pulp (418, 622, 624) is formed and washed in the compartments (104, 604, 606) of the drum (102, 602), and thereafter is discharged from the compartments. The drum (102, 602) comprises a number of filtrate channels (212, 612) for transporting filtrate from the compartments (104, 604, 606), the filtrate channels (212, 612) extending along the longitudinal extension of the drum (102, 602) and being provided inwardly of the compartments (104, 604, 606), and comprises a surface (110) permeable to fluid provided between the filtrate channels (212, 612) and the compartments (104, 604, 606), via which surface (110) the filtrate from the compartments (104, 604, 606) reaches the filtrate channels (212, 612). Each filtrate channel (212, 612) comprises an outlet (402, 614, 616) for discharging filtrate from the filtrate channel (212, 612) and has an open end at one of the ends (406, 408) of the drum (102, 602), where the open end defines said outlet (402, 614, 616). A fluid flow is generated through the filtrate channel (212, 612) from at least one fluid inlet (404, 622) of the filtrate channel (212, 612) to the outlet (402, 614, 616), and the fluid flow is controlled to capture filtrate remaining in the filtrate channel (212, 612) and to discharge fluid with the captured filtrate from the filtrate channel (212, 612) via the outlet (402, 614, 616) thereof.