WO1998016293A1 - Oscillating shower for disc filter - Google Patents
Oscillating shower for disc filter Download PDFInfo
- 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
Links
- 239000002002 slurry Substances 0.000 claims description 41
- 239000007788 liquid Substances 0.000 claims description 23
- 238000004140 cleaning Methods 0.000 claims description 3
- 230000001419 dependent effect Effects 0.000 claims description 2
- 230000000977 initiatory effect Effects 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 19
- 239000007787 solid Substances 0.000 abstract description 18
- 239000011343 solid material Substances 0.000 description 17
- 239000007921 spray Substances 0.000 description 12
- 238000001914 filtration Methods 0.000 description 10
- 239000002245 particle Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 238000013019 agitation Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002939 deleterious effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000003534 oscillatory effect Effects 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Nozzles (AREA)
- Chemically Coating (AREA)
- Filtration Of Liquid (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002268781A CA2268781A1 (en) | 1996-10-15 | 1997-10-14 | Oscillating shower for disc filter |
AU51466/98A AU5146698A (en) | 1996-10-15 | 1997-10-14 | Oscillating shower for disc filter |
SE9901346A SE518835C2 (en) | 1996-10-15 | 1999-04-15 | Disk filter oscillating shower |
FI990840A FI990840A (en) | 1996-10-15 | 1999-04-15 | Distinctive shower for a disc filter |
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 (en) | 1998-04-23 |
WO1998016293A9 WO1998016293A9 (en) | 1998-07-09 |
Family
ID=24933155
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1997/018751 WO1998016293A1 (en) | 1996-10-15 | 1997-10-14 | Oscillating shower for disc filter |
Country Status (6)
Country | Link |
---|---|
AU (1) | AU5146698A (en) |
CA (1) | CA2268781A1 (en) |
FI (1) | FI990840A (en) |
ID (1) | ID27674A (en) |
SE (1) | SE518835C2 (en) |
WO (1) | WO1998016293A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019197934A1 (en) * | 2018-04-13 | 2019-10-17 | Veolia Water Solutions & Technologies Support | Rotary disc filter having a backwash system that includes a compact nozzle support structure |
WO2020185484A1 (en) | 2019-03-08 | 2020-09-17 | Benesi Steve C | Filter apparatus, filter disc sectors, filter elements and uses |
WO2024079561A1 (en) * | 2022-10-11 | 2024-04-18 | Veolia Water Solutions & Technologies Support | Rotary disc filter having a high pressure media cleaning system |
Citations (5)
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 (en) * | 1992-05-15 | 1993-11-25 | Caustec Aktiebolag | A device for separation of solid particles from a liquid mixture |
EP0596856A1 (en) * | 1992-11-06 | 1994-05-11 | Andritz-Patentverwaltungs-Gesellschaft m.b.H. | Filtration process and device |
US5362401A (en) * | 1993-12-14 | 1994-11-08 | Aqua-Aerobic Systems, Inc. | Method and apparatus for cleaning a filter apparatus |
WO1995002442A1 (en) * | 1993-07-15 | 1995-01-26 | A. Ahlstrom Corporation | Method and apparatus for thickening lime mud with a disc filter |
-
1997
- 1997-10-14 CA CA002268781A patent/CA2268781A1/en not_active Abandoned
- 1997-10-14 AU AU51466/98A patent/AU5146698A/en not_active Abandoned
- 1997-10-14 WO PCT/US1997/018751 patent/WO1998016293A1/en active Application Filing
- 1997-10-15 ID IDW990323D patent/ID27674A/en unknown
-
1999
- 1999-04-15 FI FI990840A patent/FI990840A/en unknown
- 1999-04-15 SE SE9901346A patent/SE518835C2/en not_active IP Right Cessation
Patent Citations (5)
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 (en) * | 1992-05-15 | 1993-11-25 | Caustec Aktiebolag | A device for separation of solid particles from a liquid mixture |
EP0596856A1 (en) * | 1992-11-06 | 1994-05-11 | Andritz-Patentverwaltungs-Gesellschaft m.b.H. | Filtration process and device |
WO1995002442A1 (en) * | 1993-07-15 | 1995-01-26 | A. Ahlstrom Corporation | Method and apparatus for thickening lime mud with a disc filter |
US5362401A (en) * | 1993-12-14 | 1994-11-08 | Aqua-Aerobic Systems, Inc. | Method and apparatus for cleaning a filter apparatus |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019197934A1 (en) * | 2018-04-13 | 2019-10-17 | Veolia Water Solutions & Technologies Support | Rotary disc filter having a backwash system that includes a compact nozzle support structure |
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 (en) | 2019-03-08 | 2020-09-17 | Benesi Steve C | Filter apparatus, filter disc sectors, filter elements and uses |
EP3934786A4 (en) * | 2019-03-08 | 2022-11-09 | BENESI, Steve C. | Filter apparatus, filter disc sectors, filter elements and uses |
US12115476B2 (en) | 2019-03-08 | 2024-10-15 | Steve C. Benesi | Filter apparatus, filter disc sectors, filter elements and uses |
WO2024079561A1 (en) * | 2022-10-11 | 2024-04-18 | Veolia Water Solutions & Technologies Support | Rotary disc filter having a high pressure media cleaning system |
Also Published As
Publication number | Publication date |
---|---|
SE9901346D0 (en) | 1999-04-15 |
FI990840A (en) | 1999-05-10 |
FI990840A0 (en) | 1999-04-15 |
SE9901346L (en) | 1999-06-10 |
CA2268781A1 (en) | 1998-04-23 |
ID27674A (en) | 2001-04-19 |
SE518835C2 (en) | 2002-11-26 |
AU5146698A (en) | 1998-05-11 |
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