PROBLEM TO BE SOLVED: To provide a filtration system with a multistage scraper mechanism where filtration holes having partially smaller holes than the filtration holes are gradually formed by developing the clogging of the filtration holes at a filtration cylinder with growth.SOLUTION: A filtration system with a multistage scraper mechanism comprises: a contact scraper 10 which slidably contacts the peripheral surface of a filtration cylinder A in a filtration mechanism 2 where a fluid to be filtered in which a solid and a liquid are mixed flows and a multistage scraper mechanism 7 which is composed of non-contact scrapers 11a, 11b, 11c to keep gaps, where a connecting plate 9 to connect one of the contact scrapers and one or more non-contact scrapers with the center shaft of the filtration cylinder A and which can rotate on the peripheral surface of the filtration cylinder A.COPYRIGHT: (C)2014,JPO&INPIT【課題】濾過筒の濾過孔での目詰まりを生長的に発展させて、部分的に濾過孔より小さな大きさの濾過孔を段階的に形成した多段スクレーパ機構を備えた濾過システムの提供。【解決手段】固液が混在する被濾過流体が流通する濾過機構2の筒状の濾過筒Aの周面を摺接する接触スクレーパ10と、間隙を保持する非接触スクレーパ11a,11b,11cとより成り、前記接触スクレーパ1個と非接触のスクレーパ1個以上とを、前記濾過筒Aの中心軸と連結される連結板9に設けて多段スクレーパ機構7を形成し、濾過筒Aの周面上を回転できるようにして成ることを特徴とする多段スクレーパ機構を備えた濾過システム。【選択図】図1
