公开(公告)号：EP2994567A1

公开(公告)日：2016-03-16

申请号：EP14795236.0

申请日：2014-04-30

申请人： Valmet AB

发明人： LÖVGREN, Hans ,  FÄLLMAN, Johan

IPC分类号： D21C9/06 ,  B01D33/067 ,  D21C9/18

CPC分类号： B01D33/37 ,  B01D33/073 ,  B01D33/646 ,  D21C9/06 ,  D21C9/18

摘要： The invention is related to an apparatus for washing and/or dewatering pulp, the apparatus comprising two rotatable press rolls (202, 204) with a nip (238) between, each press roll (202, 204) including an axis (203, 205), a mantle element (206, 208) with permeable outer and inner surfaces, an axial inner drum (222, 224), and radial walls (226, 228, 230, 232) arranged between the mantle element (206, 208) and the axial inner drum (222, 224), so that axial filtrate channels (210, 212) are created between the mantle element (206, 208), the axial inner drum (222, 224) and the radial walls (226, 228, 230, 232), which filtrate channels (210, 212) are arranged to receive filtrate from the pulp. According to the invention, each press roll (202, 204) is arranged to rotate with a direction of rotation (R
1 , R
2 ), so that the pulp is arranged to be fed upwards through the nip (238); and in that at least one filtrate channel (210, 212) is provided with an oblique wall (241) between a radial wall (226, 228, 230, 232) and the mantle element (206, 208), which oblique wall (241) points in the same direction as the direction of rotation (R
1 , R
2 ) to prevent the flow of liquid from the filtrate channel (210, 212) to the outer surface of the mantle element (206, 208).