公开(公告)号：US3977970A

公开(公告)日：1976-08-31

申请号：US536974

申请日：1974-12-23

Applicant: Roderick M. Willis ,  Charles L. Oldfather

Inventor： Roderick M. Willis ,  Charles L. Oldfather

IPC: B01D24/00 ,  B03D1/24 ,  C02F1/00 ,  C02F1/24 ,  C02F9/00 ,  B01D23/16

CPC classification number: C02F9/00 ,  B03D1/028 ,  B03D1/1431 ,  B03D1/1456 ,  B03D1/1462 ,  B03D1/1487 ,  B03D1/1493 ,  B03D1/24 ,  C02F1/24 ,  C02F1/001

Abstract: Waste water containing particulate matter is saturated with air or other gas by a dynamic mixer and ejected into a gravity filter system at a point above the filter media but below the water surface level. Upon entering the filter tank, the dissolved gas is released, forming small bubbles on filterable particles to float these particles to the surface for removal. The system further includes a back pressure valve at the sewage inlet port which, if obstructed, is automatically flushed. During the backwash cycle, the water level above the filter bed may be lowered to the level of a wash-through zone, and filtered water then pumped upward through the filter media, thereby carrying particles from the filter media out through the wash-through zone.

Abstract translation: 含有颗粒物质的废水通过动态混合器被空气或其他气体饱和，并在过滤介质上方但在水面以下的一点喷射到重力过滤系统中。 在进入过滤罐时，溶解的气体被释放，在可过滤颗粒上形成小气泡，以将这些颗粒漂浮到表面以除去。 该系统还包括在污水入口处的背压阀，如果被阻塞，则自动冲洗。 在回洗循环期间，过滤床上方的水位可以降低到洗涤区的水平，然后将过滤的水向上泵送通过过滤介质，从而将来自过滤介质的颗粒通过洗涤区域 。

公开(公告)号：US3506125A

公开(公告)日：1970-04-14

申请号：US3506125D

申请日：1967-09-15

Applicant: RODERICK M WILLIS ,  CHARLES L OLDFATHER

Inventor： WILLIS RODERICK M ,  OLDFATHER CHARLES L

IPC: B01D24/46 ,  C02F1/00 ,  C02F1/24 ,  C02F1/64 ,  B01D37/00

CPC classification number: C02F1/645 ,  B01D24/22 ,  B01D24/4631 ,  B01D2201/087 ,  C02F1/001 ,  C02F1/24

公开(公告)号：US3991781A

公开(公告)日：1976-11-16

申请号：US632278

申请日：1975-11-17

Applicant: Roderick M. Willis ,  Charles L. Oldfather

Inventor： Roderick M. Willis ,  Charles L. Oldfather

IPC: B01D37/03 ,  B03D1/24 ,  C02F1/00 ,  C02F1/24 ,  C02F9/00 ,  F16K51/00

CPC classification number: C02F9/00 ,  B01D37/03 ,  B03D1/028 ,  B03D1/1431 ,  B03D1/1456 ,  B03D1/1462 ,  B03D1/1487 ,  B03D1/24 ,  C02F1/24 ,  C02F1/001 ,  Y10T137/0324 ,  Y10T137/043 ,  Y10T137/4245 ,  Y10T137/7761 ,  Y10T137/86389

Abstract: Waste water containing particulate matter is saturated with air or other gas by a dynamic mixer and ejected into a gravity filter system at a point above the filter media but below the water surface level. Upon entering the filter tank, the dissolved gas is released, forming small bubbles on filterable particles to float these particles to the surface for removal. The system further includes a back pressure valve at the sewage inlet port which, if obstructed, is automatically flushed. During the backwash cycle, the water level above the filter bed may be lowered to the level of a wash-through zone, and filtered water then pumped upward through the filter media, thereby carrying particles from the filter media out through the wash-through zone.