Disk type filtering apparatus

Patent metadata

Field	Value
Publication number	US-10016706-B2
Application number	US-201414476440-A
Country	US
Kind code	B2
Filing date	Sep 3, 2014
Priority date	Sep 3, 2014
Publication date	Jul 10, 2018
Grant date	Jul 10, 2018

Abstract

A fluid filtering apparatus such as for filtering particulates and other materials from treated water includes a tank and a filtering region configured as a plurality of individual effluent regions, defined in part by channel frames, disposed between a plurality of influent regions interposed between the effluent regions. Filter plates having an opening therethrough covered by a filter media are removable receivable in the channel frames, such that filter media in filter plates in adjacent channel frames is in a facing, opposed, relationship. A double sided backwash shoe is scannable in the influent regions, to simultaneously clean opposed filter media exposed thereto. The backwash shoe is free to move inwardly and outwardly of the opposed filter media. Additionally, the tank may include a second filtering region, which is selectively isolatable from the first filtering region.

First claim

What is claimed is:

1. A fluid filtering apparatus, comprising:
a containment volume having a fluid influent inlet and a fluid effluent outlet;
a filtration region disposed intermediate of the fluid influent inlet and the fluid effluent outlet, the filtration region including:
a plurality of effluent volumes, each effluent volume extending from a location adjacent the fluid effluent outlet, and in fluid communication with the fluid effluent outlet, and
a plurality of influent volumes extending from a location adjacent the fluid influent inlet, and in fluid communication with the fluid influent inlet, wherein each influent volume is disposed between two adjacent effluent volumes;

a plurality of filters, each effluent volume disposed within a corresponding one of the filters and each filter comprising:
a channel frame having a first side and a second side; and
a first filter plate releasably held in the channel frame at the first side of the channel frame, the channel frame and the first filter plate forming a first sidewall of the filter, wherein
the first filter plate includes a first filter media disposed between one of the influent volumes and the effluent volume of that filter when the filter plate is present in the channel frame, and
the first filter plate is configured to slide into the channel frame; and

a travelling backwash unit having at least a first backwash shoe extending vertically into a first influent volume of the plurality of influent volumes and moveable in the first influent volume across a surface of the first filter media facing the first influent volume.

2. The apparatus of claim 1 , wherein the travelling backwash unit comprises a transverse frame being operatively coupled to an upper portion of the containment volume, and wherein the first backwash shoe is suspended from the transverse frame and positioned to pass into the first influent volume and against filter plates on both sides of the first influent volume.

3. The apparatus of claim 1 , wherein the first backwash shoe has a tubular profile and openings on opposite sides thereof; and the openings are positioned and arranged to be positioned adjacent the surface of filter media located on either side of the first influent volume when the first backwash shoe is in the first influent volume.

4. The apparatus of claim 1 , wherein the first backwash shoe is moveable on a transverse frame in a direction toward or away from the filter media.

5. The apparatus of claim 1 , further including a pump fluidly coupled to the first backwash shoe, wherein the travelling backwash unit further includes a plurality of backwash shoes extending from a transverse frame of the backwash unit, each backwash shoe being positioned to pass into a different influent volume than the other backwash shoes; and
at least one valve disposed intermediate of the pump and the plurality of backwash shoes, the at least one valve being configured to selectively couple one or more backwash shoes to the pump.

6. The apparatus of claim 1 , further including a pump fluidly coupled to the first backwash shoe, wherein the travelling backwash unit further includes a flexible fluid coupling disposed intermediate of the first backwash shoe and the pump.

7. The apparatus of claim 1 , comprising a further filtration region and a removable dam plate located between the fluid influent inlet and the further filtration region.

8. An apparatus for filtering a fluid stream, comprising:
a tank having a fluid influent inlet, a fluid effluent outlet and a boundary wall separating the fluid influent inlet from the fluid effluent outlet;
a plurality of influent volumes and a plurality of effluent volumes, wherein
each influent volume is disposed between, and fluidly communicable with, an effluent volume to either side thereof through a filter media,
the influent volumes extend from an influent region adjacent the fluid influent inlet to the boundary wall; and
each effluent volume is arranged in fluid communication with the effluent outlet through a separate opening in the boundary wall; and

a plurality of filters, each effluent volume disposed inside a corresponding one of the filters and each filter comprising:
a channel frame having a first side and a second side; and
a first filter plate releasably held in the channel frame at the first side of the channel frame, the channel frame and the first filter plate forming a first sidewall of the filter, wherein
the first filter plate includes a first filter media disposed between one of the influent volumes and the effluent volume of that filter,
the first filter plate is configured to slide into the channel frame, and
the first filter plate is configured to slide out of the channel frame without removing any portion of another sidewall of the filter.

9. The apparatus of claim 8 , wherein
the plurality of filters includes a first filter, the first filter further comprising a second filter plate releasably held in the channel frame of the first filter at the second side of the channel frame,
the channel frame and the second filter plate form a second sidewall of the first filter,
the second filter plate includes a second filter media disposed between one of the influent volumes and the effluent volume of the first filter, and
the channel frame of the first filter, the first filter plate of the first filter, and the second filter plate of the first filter define a first of the plurality of effluent volumes.

10. The apparatus of claim 8 , wherein the plurality of filters includes a second filter, wherein the channel frame of the second filter is sealingly coupled to a wall of the tank, and wherein the wall of the tank, the filter plate of the second filter and the channel frame of the second filter together form a second of the plurality of effluent volumes.

11. The apparatus of claim 8 , wherein
the first filter plate includes a frame portion,
an opening in the first filter plate is through the frame portion and the opening provides for communication of fluid therethrough from an adjacent one of said plurality of influent volumes,
a filter media plate of a stiff and porous material extends over the opening of the first filter plate, and
the first filter media extends over the opening and is disposed intermediate of the filter media plate and the frame portion of the first filter plate.

12. The apparatus of claim 11 , wherein the first filter plate further comprises a frame element having an opening therethrough, the frame element disposed on a surface of the filter media plate opposite to the first filter media, wherein the frame element, filter media plate and the first filter media are secured to the frame portion of the first filter plate adjacent to a perimeter of the opening through the frame portion.

13. The apparatus of claim 1 , wherein
each filter further includes a second filter plate releasably held in the channel frame at the second side of the channel frame,
the second filter plate includes a second filter media, and
the channel frame and the second filter plate form a second sidewall of the filter.

14. The apparatus of claim 13 , wherein the first filter plate and the second filter plate are each individually removable from the channel frame and the channel frame is attached to a base of the containment volume.

15. The apparatus of claim 9 , wherein
the first filter further comprises a third sidewall and a fourth sidewall attached to a base of the tank, wherein the effluent volume of the first filter is defined by the first, second, third, and fourth sidewalls.

16. The appa

Assignees

• Alfa Laval Corp Ab

Inventors

• Dannemann Charles G
• Drescher Ross Lee
• Adams Matthew Cody

Classifications

• B01D29/33

  arranged for inward flow filtration · CPC title

• B01D29/39

  with hollow discs side by side on, or around, one or more tubes, e.g. of the leaf type · CPC title

• B01D29/114

  arranged for inward flow filtration (B01D29/15, B01D29/33 take precedence) · CPC title

• B01D2201/082

  Suction devices placed on the cake side of the filtering element · CPC title

• B01D29/15

  arranged for inward flow filtration · CPC title