| 摘要 |
The apparatus (10) comprises a cylindrical drum (20) supported with a rim structure (21, 22) on a shaft (25). An outer surface of the drum (20) com- prises a number of filter plates(23) forming a cylindrical filter surface. Each filter plate (23) is attached through at least three fastening points (P1, P2, P3) to the rim structure (21, 22). A first recess (46) extends into the filter plate (23) and a fastening flange (110) is positioned at least partly in the first recess (46). A longitudinal fastening member (120)is attached from a first end portion (121) to the fastening flange (110) and from a second end portion (122) to the rim structure (21, 22). At least one snap locking means (140) is positioned in the fastening flange (110) or in the rim structure (21, 22) or in both. The filter plate (23) is mounted on the drum (20) by pressing the filter plate (23) radially to the drum (20) so that the snap locking means (140) locks the filter plate (23) to the rim structure (21, 22) of the drum (20).The outer surface of the filter plate (23) will be unbroken, which leads to a bigger effective filter area in the filter plate (23). |
