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    • 15. 发明专利
    • Drying method for fiber web such as paper web or paperboard web and drying section
    • 纤维网的干燥方法如纸网或纸板网和干燥部分
    • JP2003328289A
    • 2003-11-19
    • JP2003112477
    • 2003-04-17
    • Metso Paper Incメトソ ペーパ インコーポレイテッド
    • ILOMAEKI JARIJUPPI KARI
    • F26B3/24D21F5/00D21F5/04D21F5/18F26B13/08
    • D21F5/00D21F5/004D21F5/04D21F5/18
    • PROBLEM TO BE SOLVED: To provide a drying method for a fiber web solving the problem of a curling caused by the sharp water content gradient in the fiber web without enlarging the equipment and without impairing drying capacity.
      SOLUTION: The method for drying the fiber web such as a paper web or paperboard web is provided. In this method, because the fiber web (W) is dried in such a manner that substantially one side thereof is dried in a belt drying unit (RC) at least one drying step, a water content gradient is caused in the fiber web (W). This method comprises the following practice. The fiber web (W) is dried by an impingement drying unit (RP) substantially just before and/or substantially just after drying it in the belt drying unit (RC), thereby leveling the above-mentioned water content gradient. In this impingement drying unit (RP), the fiber web(W) is dried from the side opposite to the side to be dried or dried by the belt drying unit (RC).
      COPYRIGHT: (C)2004,JPO
    • 要解决的问题:提供一种纤维网的干燥方法,其解决了由于纤维网中的锐利含水量梯度引起的卷曲问题,而不扩大设备并且不损害干燥能力。 提供了干燥纤维网如纸幅或纸板网的方法。 在这种方法中,由于纤维网(W)以至少一个干燥步骤在带式干燥单元(RC)中干燥的方式干燥,所以在纤维网(W)中引起含水量梯度 )。 该方法包括以下实践。 纤维网(W)通过冲击干燥单元(RP)干燥,基本上在带式干燥单元(RC)中干燥之前和/或基本上刚好在带干燥单元(RC)中干燥之后,从而平衡上述含水量梯度。 在该冲击干燥单元(RP)中,纤维网(W)从与待干燥侧面相反的一侧干燥或通过带式干燥单元(RC)干燥。 版权所有(C)2004,JPO