WO1998016293A1 - Rinceur oscillant pour filtre a disques - Google Patents

Rinceur oscillant pour filtre a disques Download PDF

Info

Publication number
WO1998016293A1
WO1998016293A1 PCT/US1997/018751 US9718751W WO9816293A1 WO 1998016293 A1 WO1998016293 A1 WO 1998016293A1 US 9718751 W US9718751 W US 9718751W WO 9816293 A1 WO9816293 A1 WO 9816293A1
Authority
WO
WIPO (PCT)
Prior art keywords
disc
filter
oscillating shower
oscillating
shower
Prior art date
Application number
PCT/US1997/018751
Other languages
English (en)
Other versions
WO1998016293A9 (fr
Inventor
Donald Brown
Johan Martensson
Bal K. Sethi
Robert C. Emmett
Steven S. Davis
Original Assignee
Baker Hughes Incorporated
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 Baker Hughes Incorporated filed Critical Baker Hughes Incorporated
Priority to AU51466/98A priority Critical patent/AU5146698A/en
Priority to CA002268781A priority patent/CA2268781A1/fr
Publication of WO1998016293A1 publication Critical patent/WO1998016293A1/fr
Publication of WO1998016293A9 publication Critical patent/WO1998016293A9/fr
Priority to SE9901346A priority patent/SE518835C2/sv
Priority to FI990840A priority patent/FI990840A/fi

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/15—Filters with filtering elements which move during the filtering operation with rotary plane filtering surfaces
    • B01D33/21—Filters with filtering elements which move during the filtering operation with rotary plane filtering surfaces with hollow filtering discs transversely mounted on a hollow rotary shaft
    • B01D33/23—Construction of discs or component sectors thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/15—Filters with filtering elements which move during the filtering operation with rotary plane filtering surfaces
    • B01D33/21—Filters with filtering elements which move during the filtering operation with rotary plane filtering surfaces with hollow filtering discs transversely mounted on a hollow rotary shaft
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/44—Regenerating the filter material in the filter
    • B01D33/46—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element
    • B01D33/463—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element nozzles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/44—Regenerating the filter material in the filter
    • B01D33/46—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element
    • B01D33/466—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element scrapers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/58—Handling the filter cake in the filter for purposes other than for regenerating the filter cake remaining on the filtering element
    • B01D33/60—Handling the filter cake in the filter for purposes other than for regenerating the filter cake remaining on the filtering element for washing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/58—Handling the filter cake in the filter for purposes other than for regenerating the filter cake remaining on the filtering element
    • B01D33/68—Retarding cake deposition on the filter during the filtration period, e.g. using stirrers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/80—Accessories
    • B01D33/804—Accessories integrally combined with devices for controlling the filtration
    • B01D33/807—Accessories integrally combined with devices for controlling the filtration by level measuring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/80—Accessories
    • B01D33/804—Accessories integrally combined with devices for controlling the filtration
    • B01D33/808—Accessories integrally combined with devices for controlling the filtration by pressure measuring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/20—Pressure-related systems for filters
    • B01D2201/204—Systems for applying vacuum to filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/28—Position of the filtering element
    • B01D2201/282—Filtering elements with a horizontal rotation or symmetry axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/30—Filter housing constructions
    • B01D35/31—Filter housing constructions including arrangements for environmental protection, e.g. pressure resisting features

Definitions

  • the invention relates generally to an agitator used in a disc filter and
  • Disc filters for separating solid particles from liquid are known in the art.
  • the disc filter includes a plurality of hollow discs 2 having side walls 3 of a filter material.
  • the hollow discs 2 are
  • the discs 2 are positioned within a
  • container 5 which has an inlet 6 (shown in FIGURE 2) for introducing a slurry of
  • a vacuum pump 7 draws the
  • the container 5 is filled approximately half way with
  • Sections of the disc 2 rotate counter-clockwise, enter the slurry and
  • a scraper 11 is used to remove solid material
  • the precoat acts as an
  • the scraper 11 removes a layer of solid material (referred to as
  • the precoat layer becomes
  • FIGURE 2 accomplishes removal of the precoat layer by using an oscillating
  • spray pipe 14 fitted with a spray nozzle 15.
  • the spray nozzle 15 moves between the periphery and center of the disc 2, sprays water on the disc 2, and removes
  • oscillating shower is increased to correspond to the interior region of the disc, then insufficient spray is achieved at the outer region of the disc.
  • the disc filter shown in FIGURES 1 and 2 may also be equipped with an
  • the solid particles must be distributed throughout the liquid. This allows the solid
  • the agitation prevents the solid particles from accumulating
  • an agitator 24 is placed in the container 5. Air is forced through the agitator 24
  • the liquid in the disc filter is forced towards the discs 2 through pressure in the container 5. As the liquid passes through the disc there is a
  • the disc filter includes oscillating showers that periodically remove the precoat layer of solids from the filter discs.
  • oscillating shower moves over the surface of the disc at a varying speed so that
  • filter also includes an agitator that forces a portion of the input slurry through a
  • the oscillating shower that oscillates at varying speeds sprays a uniform
  • the eductor agitator receives the input slurry and uses a portion of the
  • the filter capacity is also
  • FIGURE 1 is a cross-sectional side view of a conventional disc filter
  • FIGURE 2 is a cross-sectional end view of the conventional disc filter
  • FIGURE 3 is a cross-sectional side view of a conventional disc filter
  • FIGURE 4 is a cross-sectional end view of the disc filter of the present
  • FIGURE 4A is a block diagram of the disc filter control system
  • FIGURE 5 is an enlarged view of the oscillating shower wand
  • FIGURE 6 is a cross-sectional side view of the disc filter of FIGURE 4.
  • FIGURE 7 is an enlarged view of the oscillating shower actuator
  • FIGURES 8A-8C illustrate the path and speed of the oscillating shower
  • FIGURE 9 is an enlarged, exploded view of an eductor agitator.
  • FIGURE 4 is cross-sectional end view of the disc filter of the present
  • the disc filter includes at least one disc 2.
  • the disc 2 is similar to
  • the discs 2 may be a perforated material such as metal and covered with a filter material such as polypropylene.
  • the filter material is referred to
  • Each disc 2 is divided into disc sectors 70 which are used to generally as the filter cloth.
  • Each disc 2 is divided into disc sectors 70 which are used to generally as the filter cloth.
  • the discs 2 are positioned within a container 5
  • the level of the slurry can vary but typically is
  • each sector 70 fully enters the slurry and an amount of solid material is deposited on the surface of
  • each disc sector 70 The solid material is then removed from each sector 70 to
  • An oscillating shower 30 includes an oscillating shower wand 32 having
  • the oscillating shower 30 is used to remove the precoat layer
  • the disc 2 is rotated counter-clockwise (as shown of Fig. 4) at a low speed and the oscillating shower removes the precoat layer formed on the disc 2.
  • a scraper mechanism 40 includes a blade 42 that removes the cake layer
  • a chute shower 44 sprays water into the chute 46 and allows
  • the solid material to slide towards the bottom of the chute 46.
  • the solid material is sluiced down into the lime mud mix tank, using chute sprays and recirculated
  • a wash shower 50 is an optional addition to the disc filter.
  • shower includes a wash pipe 52 and a plurality of wash shower nozzles 54.
  • wash shower nozzles 54 spray water at the solid material formed on the disc
  • Wash shower 50 replaces a portion of the liquid with water thereby preventing the
  • eductor agitator 60 agitates the slurry in the container 5. If the slurry is not
  • container 5 can be extremely difficult to remove and can cause mechanical
  • the educator agitator 60 receives the input slurry from the disc filter
  • eductor agitator 60 is positioned at each side of each disc. The details of the
  • slurry is fed into the container 5 through an inlet pipe.
  • the container 5 is then
  • wash shower 50 if used, displaces the liquid to
  • the container is
  • the discs 2 are slowly rotated, and the oscillating shower 30 removes the precoat layer. Once the precoat layer is removed, the filtering process is
  • decision to initiate the oscillating shower 30 may be made automatically by control
  • the oscillating shower is activated.
  • a slurry level sensor 200 positioned within the container 5 detects the level of the slurry.
  • a pressure sensor 210 detects if the pressure in the vacuum system is increasing.
  • control circuitry 220 initiates the precoat removal cycle.
  • FIGURE 5 is an enlarged view of the oscillating shower 30 shown in
  • the oscillating shower wand 32 is made up of an upper section 35
  • the coupler 36 which has threads formed in both ends.
  • the coupler 36 allows the nozzle
  • the nozzles 34 are formed on the nozzle section 33
  • the oscillating shower wand 32 receives water from the high
  • the high pressure pipe 31 is mounted in bearings 39 which are
  • FIGURE 5 shows the oscillating shower wand
  • FIGURE 6 is a side cross-sectional view of the disc filter. As described
  • the oscillating shower wands 32 are coupled to a high pressure pipe 31.
  • the high pressure pipe 31 rotates within bearings 39 (shown in FIGURE 5) which
  • Nozzles 34 extend away
  • the oscillating shower wands 32 are driven by a pneumatic actuator 82 which is mounted on an actuator support 80.
  • the pneumatic actuator 82 drives
  • a feed pipe 84 which oscillates the high pressure pipe 31.
  • the feed pipe includes a rotating
  • the bearing/swivel joint 86 is mounted to a
  • the rotating section 89 is connected to the high
  • mounting plate 81 seals the container 5 at the area where the high pressure pipe
  • FIGURE 7 is an enlarged end view of the region including the pneumatic
  • the bearing/swivel joint 86 is not shown in FIGURE 7 for clarity.
  • the pneumatic actuator 82 is mounted to a pivot joint 88 which allows the
  • actuator arm 85 is connected to the rotating section 89 through a connection arm (not shown in the drawings) welded to the rotating section 89 and rotatably
  • FIGURES 8A-8C illustrate the path followed by the oscillating shower
  • FIGURE 8B illustrates a double
  • FIGURE 8C illustrates a triple pass.
  • the path of the oscillating shower nozzles 34 is shown by track 90.
  • the oscillating shower wand 32 travels between
  • the first radial position is at or near the periphery of the
  • the second radial position is near the center of the disc 2.
  • the track 90 is divided into a plurality of track sections 92 that indicate the
  • the track sections 92 near the center of the disc are larger than the track
  • the pneumatic arm 85 is driven faster when the nozzles 34 are near the center of the disc and slower when
  • the nozzles 34 are near the periphery of the disc. There is less surface area near
  • the nozzles 34 slow down in order to achieve
  • the speed of the oscillating shower wand 32 is dependent upon the radial position of the oscillating shower wand 32.
  • FIGURE 8B illustrates the amount of coverage when the oscillating shower makes
  • FIGURE 8C illustrates that the entire
  • FIGURE 9 is an enlarged, exploded view of the eductor agitator 60 shown
  • the eductor agitator 60 includes an eductor inlet pipe 62.
  • eductor inlet pipe 62 is fed from the main inlet pipe that provides the slurry to the
  • the eductor inlet pipe 62 is coupled to an eductor nozzle 64 which
  • the eductor nozzle 64 is mounted on the
  • the inlet pipe has a flange 622 which provides for mounting
  • An eductor inlet 664 is a cylindrical opening
  • the feed slurry is fed from the feed pipe into the inlet pipe 62 and through the
  • the nozzle 64 directs the feed through the center of the eductor assembly 66. This creates a low pressure zone in the eductor assembly which
  • eductor agitators 60 are placed within the container 5. As shown in FIGURE 6, an
  • eductor agitator 60 is preferably placed at each side of each disc 2. In this way,
  • the eductor agitators 60 may be
  • the oscillating shower uses
  • variable speed to uniformly apply water to the entire surface of the discs in a disc
  • the disc filter In accordance with still another feature of this invention, the disc filter

Abstract

Cette invention se rapporte à un rinceur oscillant (30) destiné à un filtre à disques. Ledit filtre à disques comporte au moins un disque (2) et des rinceurs oscillants qui retirent périodiquement une précouche de solides de la surface du disque. Chaque rinceur oscillant (30) se déplace à la surface du disque (2) à vitesse variable de telle sorte que l'intérieur et l'extérieur du disque se trouvent uniformément recouverts d'eau. Du côté intérieur du disque, où l'aire surfacique est relativement plus faible, le rinceur oscillant se déplace plus rapidement que du côté extérieur où l'aire surfacique est relativement plus importante.
PCT/US1997/018751 1996-10-15 1997-10-14 Rinceur oscillant pour filtre a disques WO1998016293A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AU51466/98A AU5146698A (en) 1996-10-15 1997-10-14 Oscillating shower for disc filter
CA002268781A CA2268781A1 (fr) 1996-10-15 1997-10-14 Rinceur oscillant pour filtre a disques
SE9901346A SE518835C2 (sv) 1996-10-15 1999-04-15 Oscillerande dusch för skivfilter
FI990840A FI990840A (fi) 1996-10-15 1999-04-15 Värähtelevä suihku kiekkosuodatinta varten

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US72992296A 1996-10-15 1996-10-15
US08/729,922 1996-10-15

Publications (2)

Publication Number Publication Date
WO1998016293A1 true WO1998016293A1 (fr) 1998-04-23
WO1998016293A9 WO1998016293A9 (fr) 1998-07-09

Family

ID=24933155

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1997/018751 WO1998016293A1 (fr) 1996-10-15 1997-10-14 Rinceur oscillant pour filtre a disques

Country Status (6)

Country Link
AU (1) AU5146698A (fr)
CA (1) CA2268781A1 (fr)
FI (1) FI990840A (fr)
ID (1) ID27674A (fr)
SE (1) SE518835C2 (fr)
WO (1) WO1998016293A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019197934A1 (fr) * 2018-04-13 2019-10-17 Veolia Water Solutions & Technologies Support Filtre à disques rotatifs comportant un système de lavage à contre-courant qui comprend une structure de porte-injecteurs compacte
WO2020185484A1 (fr) 2019-03-08 2020-09-17 Benesi Steve C Appareil de filtre, secteurs de disque de filtre, éléments de filtre et utilisations
WO2024079561A1 (fr) * 2022-10-11 2024-04-18 Veolia Water Solutions & Technologies Support Filtre rotatif à disques doté d'un système de nettoyage de milieu à haute pression

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4975189A (en) * 1988-12-09 1990-12-04 Liszka John A Cleaning sprays for disc filters
WO1993023140A1 (fr) * 1992-05-15 1993-11-25 Caustec Aktiebolag Dispositif utilise pour eliminer des particules solides d'un melange liquide
EP0596856A1 (fr) * 1992-11-06 1994-05-11 Andritz-Patentverwaltungs-Gesellschaft m.b.H. Procédé et appareil de filtration
US5362401A (en) * 1993-12-14 1994-11-08 Aqua-Aerobic Systems, Inc. Method and apparatus for cleaning a filter apparatus
WO1995002442A1 (fr) * 1993-07-15 1995-01-26 A. Ahlstrom Corporation Procede et dispositif d'epaississement des boues residuaires de chaux au moyen d'un filtre a disques

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4975189A (en) * 1988-12-09 1990-12-04 Liszka John A Cleaning sprays for disc filters
WO1993023140A1 (fr) * 1992-05-15 1993-11-25 Caustec Aktiebolag Dispositif utilise pour eliminer des particules solides d'un melange liquide
EP0596856A1 (fr) * 1992-11-06 1994-05-11 Andritz-Patentverwaltungs-Gesellschaft m.b.H. Procédé et appareil de filtration
WO1995002442A1 (fr) * 1993-07-15 1995-01-26 A. Ahlstrom Corporation Procede et dispositif d'epaississement des boues residuaires de chaux au moyen d'un filtre a disques
US5362401A (en) * 1993-12-14 1994-11-08 Aqua-Aerobic Systems, Inc. Method and apparatus for cleaning a filter apparatus

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019197934A1 (fr) * 2018-04-13 2019-10-17 Veolia Water Solutions & Technologies Support Filtre à disques rotatifs comportant un système de lavage à contre-courant qui comprend une structure de porte-injecteurs compacte
US11291935B2 (en) 2018-04-13 2022-04-05 Veolia Water Solutions & Technologies Support Rotary disc filter having a backwash system that includes a compact nozzle support structure
US11801464B2 (en) 2018-04-13 2023-10-31 Veolia Water Solutions & Technologies Support Rotary disc filter having a backwash system that includes a compact nozzle support structure
WO2020185484A1 (fr) 2019-03-08 2020-09-17 Benesi Steve C Appareil de filtre, secteurs de disque de filtre, éléments de filtre et utilisations
EP3934786A4 (fr) * 2019-03-08 2022-11-09 BENESI, Steve C. Appareil de filtre, secteurs de disque de filtre, éléments de filtre et utilisations
WO2024079561A1 (fr) * 2022-10-11 2024-04-18 Veolia Water Solutions & Technologies Support Filtre rotatif à disques doté d'un système de nettoyage de milieu à haute pression

Also Published As

Publication number Publication date
FI990840A (fi) 1999-05-10
SE9901346D0 (sv) 1999-04-15
FI990840A0 (fi) 1999-04-15
CA2268781A1 (fr) 1998-04-23
ID27674A (id) 2001-04-19
SE518835C2 (sv) 2002-11-26
AU5146698A (en) 1998-05-11
SE9901346L (sv) 1999-06-10

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