| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a filtration device having high filtration accuracy and hardly generating clogging. <P>SOLUTION: A filtration device 10 includes: a filtration tank 11; a conveyor 13 having a scraper 21; a primary filter 40; and a cylindrical secondary filter 60 that rotates. The inside of the filtration tank 11 is divided into a first filtration tank portion 51 and a second filtration tank portion 52 by the primary filter 40. A sludge S that has sunk to the bottom of the first filtration tank portion 51 is conveyed toward a sludge discharge portion 16 by a first portion 21a of the scraper 21. A liquid Q1 in the first filtration tank portion 51 is filtered by the primary filter 40 and flows into the second filtration tank portion 52. A liquid Q2 in the second filtration tank portion 52 is filtered by the secondary filter 60 and conveyed to a clean tank 12. The sludge S adhered to the secondary filter 60 is dropped on the primary filter 40 and discharged toward the first filtration tank portion 51 by a second portion 21b of the scraper 21. <P>COPYRIGHT: (C)2012,JPO&INPIT |
