公开(公告)号：EP0553076B1

公开(公告)日：1996-03-27

申请号：EP91900401.0

申请日：1990-10-16

申请人： VOR, Zdenek

发明人： VOR, Zdenek

IPC分类号： B01D24/46

CPC分类号： B01D24/105 ,  B01D24/205 ,  B01D24/4631 ,  B01D24/4684

摘要： PCT No. PCT/SE90/00660 Sec. 371 Date Mar. 30, 1993 Sec. 102(e) Date Mar. 30, 1993 PCT Filed Oct. 16, 1990 PCT Pub. No. WO92/06759 PCT Pub. Date Apr. 30, 1992.The invention relates to a method for washing a filter intended for cleansing a contaminated liquid and having a granular bed, a drainage system located beneath the bed, means for introducing first and second liquid flows into the bed, wherein the first liquid flow is operative to fluidize solely upper bed layers at least locally, and the second liquid flow is operative to fluidize the bed throughout the whole of its depth. The method teaches ejecting the flows of liquid selectively into the bed through orifices which are placed in the bed at a location between the highest point and the lowest point therein and which are substantially equidistant from the upper surface of the bed; and by introducing the first liquid stream into the upper layers of said bed in a smaller quantity and at a corresponding smaller rate than the second liquid stream, such that the bed layers located beneath these upper layers will be unaffected by the ongoing bed washing operation.

公开(公告)号：EP0553076A1

公开(公告)日：1993-08-04

申请号：EP91900401.0

申请日：1990-10-16

申请人： VOR, Zdenek

发明人： VOR, Zdenek

IPC分类号： B01D24 ,  B01D29 ,  B01D35 ,  B01D41

CPC分类号： B01D24/105 ,  B01D24/205 ,  B01D24/4631 ,  B01D24/4684

摘要： PCT No. PCT/SE90/00660 Sec. 371 Date Mar. 30, 1993 Sec. 102(e) Date Mar. 30, 1993 PCT Filed Oct. 16, 1990 PCT Pub. No. WO92/06759 PCT Pub. Date Apr. 30, 1992.The invention relates to a method for washing a filter intended for cleansing a contaminated liquid and having a granular bed, a drainage system located beneath the bed, means for introducing first and second liquid flows into the bed, wherein the first liquid flow is operative to fluidize solely upper bed layers at least locally, and the second liquid flow is operative to fluidize the bed throughout the whole of its depth. The method teaches ejecting the flows of liquid selectively into the bed through orifices which are placed in the bed at a location between the highest point and the lowest point therein and which are substantially equidistant from the upper surface of the bed; and by introducing the first liquid stream into the upper layers of said bed in a smaller quantity and at a corresponding smaller rate than the second liquid stream, such that the bed layers located beneath these upper layers will be unaffected by the ongoing bed washing operation.

公开(公告)号：EP0520000A1

公开(公告)日：1992-12-30

申请号：EP91906387

申请日：1991-02-27

申请人： VOR ZDENEK

发明人： VOR ZDENEK

IPC分类号： B01D24/12

CPC分类号： B01D24/12 ,  B01D24/14 ,  B01D24/4626

摘要： A liquid distributor for introducing flushing or rinsing liquid and liquid to be filtered into a granular filter bed and for removing filtrate from the bed. The distributor is intended for use in a filter for cleansing liquids and one or more of the distributors are mounted within the filter, at the bottom thereof. The distributor has formed therein a number of narrow slots which are intended for the filtrate and the width of which is smaller than the bed granules. The distributor includes one or more openings whose size is many times greater than the bed granules, these openings being intended for the flushing liquid, which is liable to contain coarse contaminants, particles, particularly when the filter is used to filter sewage water. Each type of opening is covered with a resilient or sprung shield, which permits liquid to flow into and out from the housing in a direction intended for respective openings.