| 摘要 |
A disc filter for filtering mat forming suspensions, such as fibre pulp suspensions, is provided with a hollow shaft for receiving a flow of fine fraction created by hydrostatic pressure difference between the suspension to be filtered and the fine fraction in the hollow shaft. According to the invention, each disc (7) is provided with a number of fine fraction chambers (11) communicating with the interior of the hollow shaft via respective holes (12) in the circumferential wall (5) of the shaft. Each chamber (11) is arranged, such that it functions as a dropleg during movement upwards, with the result that the coarse particle (fibre) concentration of the created coarse fraction is increased.
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