GB2232903A - Filter - Google Patents

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Publication number
GB2232903A
GB2232903A GB8914185A GB8914185A GB2232903A GB 2232903 A GB2232903 A GB 2232903A GB 8914185 A GB8914185 A GB 8914185A GB 8914185 A GB8914185 A GB 8914185A GB 2232903 A GB2232903 A GB 2232903A
Authority
GB
United Kingdom
Prior art keywords
drum
centre
filter
backwash
rotating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB8914185A
Other versions
GB8914185D0 (en
GB2232903B (en
Inventor
Mark David Jackson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB8914185A priority Critical patent/GB2232903B/en
Publication of GB8914185D0 publication Critical patent/GB8914185D0/en
Publication of GB2232903A publication Critical patent/GB2232903A/en
Application granted granted Critical
Publication of GB2232903B publication Critical patent/GB2232903B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/117—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements arranged for outward flow filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
    • B01D29/52—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in parallel connection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62—Regenerating the filter material in the filter
    • B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
    • B01D29/668—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with valves, e.g. rotating valves for coaxially placed filtering elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62—Regenerating the filter material in the filter
    • B01D29/70—Regenerating the filter material in the filter by forces created by movement of the filter element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/04—Supports for the filtering elements
    • B01D2201/0469—Filter tubes connected to collector tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/08—Regeneration of the filter
    • B01D2201/081—Regeneration of the filter using nozzles or suction devices
    • B01D2201/082—Suction devices placed on the cake side of the filtering element

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtration Of Liquid (AREA)

Abstract

A filter comprises a housing enclosing a drum 1 having apertures into which are screwed individual cylindrical filter elements 2, through which liquid flows into the drum. To clean the elements 2, the drum is rotated, bringing each element into line with one of a row of spring-loaded nozzles 3 into which some filtrate flows in the reverse direction to outlet 4. Outlet 4 comprises a cover plate which is removable to allow access to nozzles 3 without removing the drum. <IMAGE>

Description

Backflushing Self Cleaning Filter This design relates to a backflushing self cleaning liquid filter.
A back washing self cleaning liquid filter comprises a filter medium of some sort arranged inside a pressure vessel through which the liquid is caused to flow and is cleaned, and a means by which a reverse flow occurs on the filter medium to remove retained solids.
Most current filters of this type suffer from poor backwashing efficiency at finer levels of filtration, ie below 200 micron partical removal with many solid types. They also suffer loss of large amounts of backwash liquid while undergoing the cleaning operation and additionally are costly and time consuming while undergoing maintenance work.
The new design features essentially an internal rotating drum into which are mounted the filter medium elements. This drum is caused to rotate when the elements are dirty. A machined band around the drum where the elements are mounted presses against stationary spring loaded backwash pads. As the dirty filter element rotates over a pad it backwashes through the hole in the centre of the pad into a common backwash duct and thus the element medium is cleaned. Maintenance of the filter element can be carried out from the backwash duct without removal of ancilliary parts, ie motors and top vessel cover.

Claims (2)

1. A rotating centre drum (1) into which cylindrical filter elements (2) are screwed into and around its diameter and retained to achieve maximum usage of filter volume.
2. Backwash pads, as claimed in Claim 1., operate under spring pressure onto the outside diameter of the centre rotating drum from a common backwash duct (4) and this duct, and the filter elements, can be removed directly from the outside of the vessel without removal of centre drum or filter top cover.
2. Backwash pads (3) which are caused to be spring loaded against machined portion of outside diameter of rotating centre drum into which elements are screwed. Thereby allowing effective progressive backwashing of all filter elements inside filter drum through centre of pad as centre drum rotates.
3. Backwash pads operate under spring pressure onto outside diameter of the centre rotating drum from a common backwash duct (4) and are removable together with filter elements directly from the outside of the vessel without removal of centre drum or filter top cover.
Amendments to the claims have been filed as follows 1. A backwashing self-cleaning filter comprising a rotating centre drum (1) into which cylindrical filter elements (2) are screwed, into and around its diameter.
Backwash pads (3) are caused to be spring loaded against the outside of the machined portion of this rotating centre drum (1), allowing effective progressive backwashing of all filter elements (2) inside filter drum through centre of pad as centre drum rotates.
GB8914185A 1989-06-20 1989-06-20 Backflushing self cleaning filter Expired - Fee Related GB2232903B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8914185A GB2232903B (en) 1989-06-20 1989-06-20 Backflushing self cleaning filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8914185A GB2232903B (en) 1989-06-20 1989-06-20 Backflushing self cleaning filter

Publications (3)

Publication Number Publication Date
GB8914185D0 GB8914185D0 (en) 1989-08-09
GB2232903A true GB2232903A (en) 1991-01-02
GB2232903B GB2232903B (en) 1993-04-14

Family

ID=10658766

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8914185A Expired - Fee Related GB2232903B (en) 1989-06-20 1989-06-20 Backflushing self cleaning filter

Country Status (1)

Country Link
GB (1) GB2232903B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0855205A1 (en) * 1996-12-28 1998-07-29 Knecht Filterwerke Gmbh Filter for liquids containing contaminants

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB574896A (en) * 1944-05-31 1946-01-24 Richard Sydney Brownlow Improvements relating to apparatus for the filtration of liquids
GB897315A (en) * 1958-09-04 1962-05-23 Hans Jung An improved method and apparatus for separating a sludge into filtrate and residue
GB1066951A (en) * 1963-08-12 1967-04-26 Kinney Eng Inc S P Strainer
US3635348A (en) * 1970-06-09 1972-01-18 Kinney Eng Inc S P Automatic self-cleaning strainers
GB1410439A (en) * 1972-07-27 1975-10-15 Envirotech Corp Rotary pressure-differential filter apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB574896A (en) * 1944-05-31 1946-01-24 Richard Sydney Brownlow Improvements relating to apparatus for the filtration of liquids
GB897315A (en) * 1958-09-04 1962-05-23 Hans Jung An improved method and apparatus for separating a sludge into filtrate and residue
GB1066951A (en) * 1963-08-12 1967-04-26 Kinney Eng Inc S P Strainer
US3635348A (en) * 1970-06-09 1972-01-18 Kinney Eng Inc S P Automatic self-cleaning strainers
GB1410439A (en) * 1972-07-27 1975-10-15 Envirotech Corp Rotary pressure-differential filter apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0855205A1 (en) * 1996-12-28 1998-07-29 Knecht Filterwerke Gmbh Filter for liquids containing contaminants

Also Published As

Publication number Publication date
GB8914185D0 (en) 1989-08-09
GB2232903B (en) 1993-04-14

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19950620