[go: up one dir, main page]

WO1995000230A1 - Filtre ceramique - Google Patents

Filtre ceramique Download PDF

Info

Publication number
WO1995000230A1
WO1995000230A1 PCT/AU1994/000334 AU9400334W WO9500230A1 WO 1995000230 A1 WO1995000230 A1 WO 1995000230A1 AU 9400334 W AU9400334 W AU 9400334W WO 9500230 A1 WO9500230 A1 WO 9500230A1
Authority
WO
WIPO (PCT)
Prior art keywords
filtration element
filter assembly
scrubbing
debris
wearing member
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.)
Ceased
Application number
PCT/AU1994/000334
Other languages
English (en)
Inventor
Ronald William Arthur
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.)
MURASAP INDUSTRIES Ltd
Original Assignee
MURASAP INDUSTRIES Ltd
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 MURASAP INDUSTRIES Ltd filed Critical MURASAP INDUSTRIES Ltd
Priority to AU69902/94A priority Critical patent/AU6990294A/en
Publication of WO1995000230A1 publication Critical patent/WO1995000230A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • B01D29/31—Self-supporting filtering elements
    • B01D29/33—Self-supporting filtering elements arranged for inward 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
    • B01D29/64—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element
    • B01D29/6469—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element scrapers
    • B01D29/6476—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element scrapers with a rotary movement with respect to the filtering element
    • 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
    • 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

Definitions

  • This invention relates to a filter assembly and in particular a filter assembly of the self-cleaning type which may be used to filter drinking water.
  • this is not the only fluid that may be used in such an assembly.
  • Filters are available which have the facility to filter out viruses and bacteria from water and other fluids and thereby purify it for consumption and/or various industrial uses. Notwithstanding the availability of such filters, filters capable of performing these functions have previously used osmotic filter films and these are very fragile and expensive to replace.
  • Uniform erosion of the surface of the ceramic element is achieved by bringing a scrubbing or wearing element into contact with the ceramic element outer surface. This results in erosion or wearing away of the scrubbing or wearing element, as well as the ceramic element, so that a new surface of the scrubbing or wearing element is progressively presented to the ceramic element surface.
  • this invention provides a filter assembly comprising at least one ceramic filtration element, at least one scrubbing or wearing member biased with biasing means such that a contact surface of said scrubbing or wearing member contacts a debris accumulation surface of said filtration element located such that, with relative movement between said filtration element and said scrubbing or wearing member, the contact surface of said scrubbing or wearing element is eroded or worn away and the outermost layer of said debris accumulation surface of said filtration element, together with any trapped debris, is removed.
  • the filtration element is cylindrical in shape and located co-axially inside a hollow cylindrical sleeve, and at least one debris removal member is attached to the inside of said sleeve and biased against said filtration element.
  • a further aspect of the filter assembly there exists a driving means for rotating said sleeve with respect to said filtration element.
  • a further aspect of the filter assembly comprises a timing means adapted to actuate the driving means after a predetermined time.
  • Yet a further aspect of the filter assembly comprises a fluid flow measurement means for measuring the flow of fluid through the filter assembly and further adapted to actuate the driving means after measuring a predetermined minimum flow.
  • a method of cleaning the filter assembly which further comprises an outlet valve located so as to allow fluid on the debris accumulation surface side of the filtration element out of the filter assembly, said method comprising the steps of (a) actuating said driving means and (b) opening said outlet valve, while pumping fluid into said filter assembly so that debris flows out of the outlet valve of the filter assembly and the pumped fluid only contacts the debris accumulation surface of the filtration element.
  • the automatic cleaning system of the present invention is designed to clean any type of ceramic filtration element, regardless of the element's overall dimensions, hardness or porosity, where the outer surface of the ceramic element is used to trap debris during the passage of filtrate (which can be an aqueous solution, gas or other fluid) from the outside surface of the ceramic element, through to the other side (hollow interior) of the ceramic element.
  • filtrate which can be an aqueous solution, gas or other fluid
  • ceramic elements in the one micron, sub-micron and larger micron ranges can be cleaned using this system.
  • the scrubbing or wearing member is a scrubber pad of no more than 0.5mm in thickness.
  • the contact surface of the pad may, for example, comprise embedded chips, with sharp edges, of a material possessing extreme hardness, such that said material resists the wearing capabilities of ceramic surfaces.
  • Fig 1 is a top view of a filter assembly according to this invention.
  • Fig 2 is a partial sectioned side view of Fig 1 taken on line 2-2 of Fig 1;
  • Fig 3 is a section taken on plane 3-3 of Fig 2;
  • Fig 4 is a fragmentary section taken on plane 4-4 of Fig 2, but drawn to a much larger scale;
  • Fig 5 illustrates the various components of a further filter assembly according to this invention, and how they are assembled
  • Fig 6A is a side view of the scrubbing or wearing element of the filter assembly of Fig 5, which scrubbing or wearing element, in this embodiment, is a scrubber blade;
  • Fig 6B is a side view of the end of the scrubber blade of Fig 6A, but drawn to a larger scale;
  • Fig 6C illustrates how the scrubber blade of Fig 6A is attached to its support housing
  • Fig 6D illustrates the structure of the pad of the scrubber blade of Fig 6A; and Fig 7 illustrates the erosion or wearing away, in use, of the scrubber blade of Fig 6A.
  • a filter assembly 10 comprises a housing having a cylindrical side wall 11 and dome shaped end caps 12.
  • the lower plate 14, however, is carried on an upstanding hollow stem 18 which extends upwardly from the lower end cap 12, and the stem 18 is perforate at 19 to open into a manifold 20 which is in fluid communication with the lower ends of each of a plurality of ceramic filtration elements 21.
  • Each filtration element 21 is contained within a respective apertured protective sleeve 22 (shown in most detail in Fig 4) and the sleeves 22 constitute a fixing point for at least one scrubbing or wearing member, comprising in this embodiment a filter scrubbing pad holder 25 and a scrubbing pad 23.
  • Each scrubbing pad 23 is carried on a pivoting arm filter scrubbing pad holder 25 which itself projects from a pivot pin 26 which is pivoted between end plates located (but not shown) at the lower and upper ends of the filtration element 21.
  • the filtration element may comprise a ceramic medium of suitable porosity to restrict the passage of debris and foreign matter which may be as small as 0.2 to 0.3 microns.
  • the filtration element may also comprise sintered material with similar porous and filtering characteristics.
  • the end plates are located in the ends of and fixed with respect to the sleeves 22, so as to rotate with them, and this rotation is effected by each of the sleeves having attached to one end thereof a gear.
  • a train of gears is provided and includes a driving gear 28 which engages with one of the plurality of inter-meshing gears 29, such that, when the driving gear is actuated, the inter-meshed gears are driven to thereby rotate respective sleeves 22.
  • the driving gear may be driven by an external motor coupled to the driving shaft 30 which extends through the upper end of the end cap 12.
  • the driving means may be selectively actuated by manual means or motorised driving forces, or control of when the driving means is actuated may be achieved by a timing means.
  • the timing means is set to operate at preset times of the day, preferably when the filter assembly is not being used or during low activity periods of an industrial environment in which the filter assembly is being used.
  • Each filtration element 21 may preferably be a single length of cylindrical material, but may also comprise a plurality of cylindrical filter elements which are aligned end-to-end, and wherein the interconnection between adjacent filter elements is a sealed interconnection so that fluid does not have a path of lesser resistance to travel.
  • a bias means comprising in this embodiment a helical coil torsion spring 32 arranged as shown in Fig 4.
  • scrubbing pads 23 traverse the outer circumferential surface of the respective filtration elements 21.
  • the holders for the pads 23 need not necessarily be associated with the perforate sleeves 22.
  • an outlet valve (not shown) is located on the filter assembly so as to allow fluid, on the debris accumulation surface side of the filtration element, out of the filter assembly.
  • a method of cleaning the filter assembly comprises actuating the driving means to remove debris from the debris accumulation surface of the filtration element while opening the outlet valve during pumping of filtered fluid (water) into the filter assembly, so that debris flows out of the opened outlet valve of the filter assembly. Consequently pumped fluid will only ever contact the debris accumulation surface of the filtration element.
  • Actuation of the gear driving means to drive the scrubbing or wearing member/s during back flushing may also be used.
  • a further alternative control mechanism for the onset of the operation of the driving means may be through the use of a pressure sensor or flow switch which is responsive to the pressure or flow of the filtered fluid exiting from the filter assembly.
  • a predetermined minimum flow pressure of filtered water from the filter assembly is representative of a filter, having debris build up on the filtration element.
  • FIG. 10 Another filter assembly 10 according to the present invention is depicted in Figs 5 to 7.
  • the scrubbing or wearing member is a scrubber blade 23', which is pivotably attached to a scrubber support housing 22' and biased to scrape against the sides of the ceramic element 21.
  • the pivotable attachment comprises a hinge pin 40 fixed such that its longitudinal axis 41 is arranged parallel with the sides of the ceramic element 21.
  • a scrubber support housing 22' shown in elevation and plan in Fig 5 has a top cover portion 42 and a lower cover portion 43 between which the hinge pin 40 is captured and allowed to pivotably rotate.
  • the scrubber blade 23' is fixed to the hinge pin via a connector spigot 44 which further allows the scrubber blade 23' to pivot thereabouts before being fixed into position which allows for any vertical out-of-alignment of the ceramic element 21 or the scrubber support housing 22'.
  • a flat spring 32' is fixed to the scrubber blade 23' which extends outwardly therefrom, to bear against the inner surface of the scrubber support housing 22'.
  • This spring is one form of a biasing means.
  • the action of this biasing means is more clearly shown by the schematic plan view provided Figs 7B and 7C.
  • the flat spring 32' is arranged to bias the scrubber blade 23' inwards and against the ceramic element 21 and is shown in two operational positions the first designated Y is adopted when the filter element is new and the second position designated X is adopted when the filter element has been worn down by the action of the scrubber blade 23' against the filter element 21 over time.
  • the depicted orientation of the flat spring 32' results from, in this embodiment, the anti-clockwise rotation 45 of the scrubber support housing 22'.
  • Fig 5B depicts plan views of the top cover portion 42 indicating a nominal position for axis 41.
  • a large drive gear 46 forms part of the scrubber support housing assembly, and is driven by another gear of smaller diameter (not shown) .
  • Appropriate selection of the diameter of each of these drive gears allows interconnection with an energy source (which may be manual, mechanical or other) to turn the scrubber assembly at a required number of revolutions per minute (rpm) .
  • Figs 5 to 7 show only one scrubber blade 23' in place. However, two scrubber blades or alternatively four scrubber blades may be used at the same time. They may be evenly distributed about the periphery of the scrubber support housing and as the number of the blades increases the optimum number of rpm will change.
  • Quantification and/or experimentation to determine these factors allows the calculation of a number of revolutions which the scrubbing or wearing element/s 23' must make around the ceramic filtration element 21, during each cleaning cycle, and the optimum speed of the revolutions may be determined from an assessment of the efficiency of the scrubbing achieved. It may also be necessary to account for the lessening diameter of the ceramic element 21, its increasing age, and the consistency of surface abrasion under those changing conditions.
  • a cleaning cycle of approximately 150 seconds at 16 rpm of the scrubbing or wearing member 23 satisfactorily removes accumulated debris and the least necessary measured amount of the outer layer of the ceramic filter 21.
  • Figs 6A to 6D show details of the scrubber blade 23', and as described previously the arrangement of springs 32' varies from the embodiment illustrated in Figs 1 to 4.
  • An alternative assembly of the scrubber blade 23' may make use of a hinge pin (as shown in Fig 6C) in conjunction with the spring placement shown in Fig 4.
  • Position X is the contact position of the scrubber blade 23' when the ceramic element 21 is at the end of its useful life
  • Position Y is a contact position of the scrubber blade 23' when the ceramic element 21 is at the beginning of its useful life.
  • the distance between contact Position X and contact Position Y represents the depth of the ceramic element 21 removed by the scrubber blade 23' during the useful life of the ceramic element 21.
  • the scrubber blade 23' may be configured with a square edge at its ends (as in the embodiment shown in Fig 4) , a square edge may contribute to a wear pattern on the filtration element 21 and a consequent weakening of the element.
  • the formation of a square edge wear profile is more likely to be the source of a breakage or failure of the ceramic element 21, therefore, preferably the scrubber blade 23' is provided an arcuate end shape 48 depicted in one embodiment by Fig 6B.
  • Every ceramic element 21 has a maximum depth to which it can be eroded in the course of cleaning. When this maximum depth (represented pictorially on Fig 7A as X') is reached, the ceramic element 21 is at the end of its useful life. If the ceramic element is eroded past this depth, failure of the ceramic element by breakage is liable to occur.
  • the scrubber blade 23' has been designed to cease functioning when this depth is reached. This feature is provided by a flat section 47 located on the ends of the scrubber blade 23' and adjacent the curved profile 48 of the scrubber blade as depicted in Figs 6B and 7A.
  • filter assembly of the present invention ceramic elements can be cleaned as single elements or in any desired configuration of multiple elements.
  • the most economical configuration when manufacturing cost to water produced per hour is an important consideration, is achieved when using an eight element configuration as depicted in Figs 1 to 4 (shown most clearly in Fig 3). It will be appreciated that filter assemblies according to the present invention are not restricted in their use to the filtration of water for domestic and industrial uses and the invention provides automatic cleaning of filter assemblies of many types and configurations.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtering Materials (AREA)

Abstract

Ensemble filtre auto-nettoyant principalement destiné à la filtration d'eau potable. Un élément filtrant céramique (21) est monté dans un boîtier (22) avec au moins un élément d'usure ou de frottement (23) monté de façon à être sollicité, par un élément sollicitant (32), sur la surface à accumulation de débris de l'élément filtrant. Le mouvement relatif entre l'élément de filtration et l'élément d'usure permet d'enlever par frottement une partie de la surface à accumulation de débris de l'élément filtrant en même temps que les débris.
PCT/AU1994/000334 1993-06-21 1994-06-21 Filtre ceramique Ceased WO1995000230A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU69902/94A AU6990294A (en) 1993-06-21 1994-06-21 Ceramic filter

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPL950293 1993-06-21
AUPL9502 1993-06-21

Publications (1)

Publication Number Publication Date
WO1995000230A1 true WO1995000230A1 (fr) 1995-01-05

Family

ID=3776989

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1994/000334 Ceased WO1995000230A1 (fr) 1993-06-21 1994-06-21 Filtre ceramique

Country Status (2)

Country Link
WO (1) WO1995000230A1 (fr)
ZA (1) ZA944429B (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6337013B1 (en) 1997-12-23 2002-01-08 Ontario Power Generation, Inc. Removable filter with jack sealing device and vacuum cleaning heads
CN103933767A (zh) * 2014-04-23 2014-07-23 李云生 免拆洗陶瓷滤芯净水器
EP2767321A1 (fr) 2013-02-13 2014-08-20 F.M., S.r.L. Unipersonale Filtre autonettoyant
WO2016151151A1 (fr) * 2015-03-24 2016-09-29 Bas Tech International S.L. Système de filtration compact auto-nettoyant à membrane céramique d'ultrafiltration

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1660619A (en) * 1926-06-26 1928-02-28 William W Klemm Scraper for water filters
GB2247187A (en) * 1990-08-24 1992-02-26 Chen Tsong Hae Water filter
AU8695891A (en) * 1991-11-01 1993-05-20 Tsung-Hai Chen Filter automatic cleansing water cleaner
WO1993010879A1 (fr) * 1991-12-03 1993-06-10 Murasap Industries Limited Filtre ceramique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1660619A (en) * 1926-06-26 1928-02-28 William W Klemm Scraper for water filters
GB2247187A (en) * 1990-08-24 1992-02-26 Chen Tsong Hae Water filter
AU8695891A (en) * 1991-11-01 1993-05-20 Tsung-Hai Chen Filter automatic cleansing water cleaner
WO1993010879A1 (fr) * 1991-12-03 1993-06-10 Murasap Industries Limited Filtre ceramique

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6337013B1 (en) 1997-12-23 2002-01-08 Ontario Power Generation, Inc. Removable filter with jack sealing device and vacuum cleaning heads
EP2767321A1 (fr) 2013-02-13 2014-08-20 F.M., S.r.L. Unipersonale Filtre autonettoyant
CN103933767A (zh) * 2014-04-23 2014-07-23 李云生 免拆洗陶瓷滤芯净水器
WO2016151151A1 (fr) * 2015-03-24 2016-09-29 Bas Tech International S.L. Système de filtration compact auto-nettoyant à membrane céramique d'ultrafiltration

Also Published As

Publication number Publication date
ZA944429B (en) 1995-02-16

Similar Documents

Publication Publication Date Title
CN102971059B (zh) 流体过滤和颗粒聚集装置和方法
US6187177B1 (en) Industrial filter
JP3839074B2 (ja) 逆流洗浄式フィルタ
CA2566428C (fr) Pomme de douche dotee d'une buse de pulverisation amovible
US4781825A (en) Filter with self-actuating rotating backwash selector
JP6158581B2 (ja) 濾過装置
KR101299806B1 (ko) 유체 필터
US6139727A (en) Self-cleaning water filter
KR100513356B1 (ko) 연속-작동 여과 방법 및 장치
US5389256A (en) Filter apparatus for machine tool coolant
JPS631085B2 (fr)
JP3893313B2 (ja) 流体フィルタ
CN102430339A (zh) 自清洗过滤膜装置
CA1157391A (fr) Filtre pour liquide
KR101919732B1 (ko) 세정 기능을 구비한 도관용 필터 어셈블리
WO1995000230A1 (fr) Filtre ceramique
JP2019098273A (ja) ストレーナ
CN113926233B (zh) 一种低负载启动的过滤器
AU6990294A (en) Ceramic filter
WO1993010879A1 (fr) Filtre ceramique
KR101499781B1 (ko) 오토 스트레이너
RU2329085C1 (ru) Фильтр щелевой ножевой
WO2016067302A1 (fr) Procédé et systèmes de différents nettoyages nep de filtre ribac c pour eau/liquides visqueux
JPH0470042B2 (fr)
SU1595549A1 (ru) Самоочищающийс фильтр

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AM AT AU BB BG BR BY CA CH CN CZ DE DK ES FI GB GE HU JP KE KG KP KR KZ LK LU LV MD MG MN MW NL NO NZ PL PT RO RU SD SE SI SK TJ TT UA US UZ VN

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN ML MR NE SN TD TG

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

ENP Entry into the national phase

Ref country code: US

Ref document number: 1996 578517

Date of ref document: 19960415

Kind code of ref document: A

Format of ref document f/p: F

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: CA