| 摘要 |
PROBLEM TO BE SOLVED: To provide a filter capable of compacting a cake not only to accelerate dehydration but also to adjust the degree of compaction of the cake. SOLUTION: The filter is equipped with a cylindrical or conical inside filter medium 1 arranged in a concentric state, an outside filter medium 2 and the spiral partition 3 provided to the filter space 4 between the inside filter medium 1 and the outer filter medium 2. Since the spiral partition 3 is not rotated, only the inside filter medium 1 or the outside filter medium 2 is rotated around the axis of the filter. In this operation process, a liquid to be treated is sent into the filter space 4 from one end side thereof to be successively filtered through the inside filter medium 1 and the outer filter medium 2 while the filtrate is discharged and the cake is discharged from the other end side of the filter space 4. A back pressure plate 15 for squeezing the cake is provided to the cake discharge port 14 formed to the other end side of the filter space 4. COPYRIGHT: (C)2007,JPO&INPIT
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