CA2278957A1 - Liquid treatment media regeneration apparatus and process - Google Patents
Liquid treatment media regeneration apparatus and process Download PDFInfo
- Publication number
- CA2278957A1 CA2278957A1 CA002278957A CA2278957A CA2278957A1 CA 2278957 A1 CA2278957 A1 CA 2278957A1 CA 002278957 A CA002278957 A CA 002278957A CA 2278957 A CA2278957 A CA 2278957A CA 2278957 A1 CA2278957 A1 CA 2278957A1
- Authority
- CA
- Canada
- Prior art keywords
- liquid
- separator
- filter
- tank
- media
- 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
Links
- 239000007788 liquid Substances 0.000 title claims abstract 45
- 238000000034 method Methods 0.000 title claims abstract 14
- 230000008929 regeneration Effects 0.000 title 1
- 238000011069 regeneration method Methods 0.000 title 1
- 239000008187 granular material Substances 0.000 claims abstract 18
- 239000002002 slurry Substances 0.000 claims abstract 10
- 239000000356 contaminant Substances 0.000 claims abstract 6
- 238000013019 agitation Methods 0.000 claims 4
- 238000001914 filtration Methods 0.000 claims 4
- 239000000203 mixture Substances 0.000 claims 2
- 238000004140 cleaning Methods 0.000 claims 1
- 230000003116 impacting effect Effects 0.000 claims 1
- 230000001939 inductive effect Effects 0.000 claims 1
- 239000007787 solid Substances 0.000 claims 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
- B01D24/02—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration
- B01D24/10—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration the filtering material being held in a closed container
- B01D24/12—Downward filtration, the filtering material being supported by pervious surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
- B01D24/46—Regenerating the filtering material in the filter
- B01D24/4668—Regenerating the filtering material in the filter by moving the filtering element
- B01D24/4673—Regenerating the filtering material in the filter by moving the filtering element using rotary devices or vibration mechanisms, e.g. stirrers
Abstract
A deep bed liquid treatment apparatus and process in which the liquid and a granular media is periodically agitated to create a liquid-media slurry, and outflow of the liquid and entrained contaminants is induced through a separator having an inner diameter screen with openings sufficiently small to prevent the escape of media granules. A rotor is rotated within the separator to create turbulent flow at the screen to dislodge the granules drawn onto the screen openings.
Claims (22)
1. A deep bed filter comprising:
a tank defining an internal space for containing a liquid to be filtered, and an inlet for directing liquid to be filtered into said tank;
a granular filter media bed disposed in said tank occupying a portion of the internal space in said tank;
an outlet receiving a flow of filtered liquid after passing through said media bed;
at least one agitator element mounted within said tank space;
periodically operated means for causing said agitator element to be moved so as to cause dispersal of said filter media and liquid within said tank space to form a slurry mixture of liquid and granular media;
an annular separator having an inner cylindrical screen having flow openings formed therein smaller than the size of said granular filter media to prevent said granular filter media flow from passing therethrough while allowing flow therethrough of filtered solids dispersed into said liquid by agitation set up by said movement of said agitator element within said tank;
outlet means drawing liquid out through said separator flow openings and into an annular space within said separator, and out of said tank; and, means for creating localized liquid flow at the surface of said inner cylindrical screen directing dispersed media at said screen surface so as to dislodge granular media drawn onto said flow openings during outflow of liquid through said openings.
a tank defining an internal space for containing a liquid to be filtered, and an inlet for directing liquid to be filtered into said tank;
a granular filter media bed disposed in said tank occupying a portion of the internal space in said tank;
an outlet receiving a flow of filtered liquid after passing through said media bed;
at least one agitator element mounted within said tank space;
periodically operated means for causing said agitator element to be moved so as to cause dispersal of said filter media and liquid within said tank space to form a slurry mixture of liquid and granular media;
an annular separator having an inner cylindrical screen having flow openings formed therein smaller than the size of said granular filter media to prevent said granular filter media flow from passing therethrough while allowing flow therethrough of filtered solids dispersed into said liquid by agitation set up by said movement of said agitator element within said tank;
outlet means drawing liquid out through said separator flow openings and into an annular space within said separator, and out of said tank; and, means for creating localized liquid flow at the surface of said inner cylindrical screen directing dispersed media at said screen surface so as to dislodge granular media drawn onto said flow openings during outflow of liquid through said openings.
2. The filter according to claim 1 wherein said means for moving said agitator element comprises means for continuously rotating said agitation element about a central axis of said separator.
3. The filter according to claim 2 wherein said means for creating localized flow comprises a rotor mounted to be rotated within said separator inner wall to create turbulence at said separator inner wall, said means for rotating said agitator element comprising said means rotating said agitator element.
4. The filter according to claim 3 wherein said agitator element comprises at least one impeller mounted to be rotated by said drive means.
5. The filter according to claim 3 wherein said drive means includes shaft extending downwardly into said tank space to suspend said rotor within said separator strainer.
6. The filter according to claim 5 wherein said agitator element is mounted beneath said separator and above said filter media bed.
7. The filter according to claim 5 wherein said at least one agitator element comprises an impeller mounted above said separator rotor.
8. The filter according to claim 1 wherein said filter tank is closed to the atmosphere and pressurized during filtering of said liquid.
9. The filter according to claim 1 wherein said filter tank is open to the atmosphere during filtering of said liquid.
10. A filtering process for removing contaminants suspended in a liquid to be filtered, comprising the steps of:
disposing a mass of granular filter media in a tank so as to form a filter, deep bed;
passing liquid through said deep bed to remove said contaminants;
collecting filtered liquid passed through said bed and directing the same out of said tank for use;
periodically interrupting filtering of said liquid to remove accumulated contaminants from said granular filter media, by a cleaning process comprising the steps of agitating liquid and filter media in said tank to form a slurry of liquid and dispersed filter media granules;
circulating said slurry over a separator having a wall formed with flow openings sized smaller than the size of said filter media granules to prevent escape of filter media therethrough while allowing outflow of liquid and contaminants therethrough;
inducing an outflow of liquid and contaminants out of said tank through said separator openings;
maintaining a localized flow in said liquid at said separator wall to continuously dislodge filter media granules drawn against said separator openings by said liquid outflow.
disposing a mass of granular filter media in a tank so as to form a filter, deep bed;
passing liquid through said deep bed to remove said contaminants;
collecting filtered liquid passed through said bed and directing the same out of said tank for use;
periodically interrupting filtering of said liquid to remove accumulated contaminants from said granular filter media, by a cleaning process comprising the steps of agitating liquid and filter media in said tank to form a slurry of liquid and dispersed filter media granules;
circulating said slurry over a separator having a wall formed with flow openings sized smaller than the size of said filter media granules to prevent escape of filter media therethrough while allowing outflow of liquid and contaminants therethrough;
inducing an outflow of liquid and contaminants out of said tank through said separator openings;
maintaining a localized flow in said liquid at said separator wall to continuously dislodge filter media granules drawn against said separator openings by said liquid outflow.
11. The filter process according to claim 11 wherein said step of maintaining a localized flow comprises the steps of configuring said separator wall as a cylinder and rotating a rotor within said cylinder, with an outer perimeter closely spaced from said wall to create turbulent flow at the tips.
12. The filter process according to claim 11 wherein said step of forming a liquid-filter media granule slurry comprises the step of mechanically agitating said mixture by moving an agitator element within said liquid to set up a vertical circulation thereof.
13. The filter process according to claim 12 wherein said mechanical agitation step comprises the step of rotating an impeller comprising said agitator element within said liquid in said tank to create said slurry.
14. The filter process according to claim 15 further including the step of driving said impeller and said rotor with a common shaft.
15. The filter process according to claim 11 wherein said filter openings comprise parallel slits and wherein in said step of moving said separator element, said separator element is moved in a direction across said slits to produce said turbulence.
16. The filter process according to claim 13 further including the step of facing said impeller downwardly in said tank to cause a downward circulation of liquid into said filter bed upon rotation of said impeller.
17. A process for separating granular media used in a liquid treatment apparatus from the treated liquid in a tank, said granular media being of a predetermined size, comprising the steps of:
dispersing said granular media into said liquid to form a slurry;
drawing said liquid out of said slurry through a separator against which said slurry is circulated, said separator having a surface formed with flow openings of a smaller size than the granules making up said granular media to prevent escape of said granular media; and establishing a turbulent flow at the surface of said separator so as to dislodge any granular media granules drawn to said openings by impacting granules at said openings with other granules in said slurry by said turbulent flow.
dispersing said granular media into said liquid to form a slurry;
drawing said liquid out of said slurry through a separator against which said slurry is circulated, said separator having a surface formed with flow openings of a smaller size than the granules making up said granular media to prevent escape of said granular media; and establishing a turbulent flow at the surface of said separator so as to dislodge any granular media granules drawn to said openings by impacting granules at said openings with other granules in said slurry by said turbulent flow.
18. The process according to claim 17 wherein said step of dispersing said granular media comprises the step of mechanically agitating said liquid and granular media.
19. The process according to claim 18 wherein said mechanical agitation step comprises the step of rotating one or more agitator elements in said liquid.
20. The process according to claim 21 wherein in said steps of rotating said agitator element and establishing a turbulent flow at said separator surface are carried out together simultaneously.
21. Apparatus for treatment of a liquid comprising: a tank having a space adapted to receive said liquid to be treated;
a mass of granular material utilized in said liquid treatment disposed in said tank space, said granular material comprised of granules of a predetermined minimum size;
an outlet for allowing removal of liquid from said tank;
a separator formed with a surface having flow openings therein of smaller size than the said granules of said granular material;
means for drawing liquid in said tank space through said separator element flow openings and out through said outlet;
agitator means for maintaining a dispersal of said granular material in said liquid while said liquid is being drawn off; and, means directing a turbulent flow of liquid at said separator surface while said liquid is being drawn therethrough to scrub said surface, whereby said openings in said separator are kept clear of said granules.
a mass of granular material utilized in said liquid treatment disposed in said tank space, said granular material comprised of granules of a predetermined minimum size;
an outlet for allowing removal of liquid from said tank;
a separator formed with a surface having flow openings therein of smaller size than the said granules of said granular material;
means for drawing liquid in said tank space through said separator element flow openings and out through said outlet;
agitator means for maintaining a dispersal of said granular material in said liquid while said liquid is being drawn off; and, means directing a turbulent flow of liquid at said separator surface while said liquid is being drawn therethrough to scrub said surface, whereby said openings in said separator are kept clear of said granules.
22. The apparatus for treatment of a liquid according to claim 21 wherein said agitator means comprises an agitator impeller in said tank driven by said drive means to mechanically agitate said liquid to disperse said granular material therein.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US123,595 | 1998-07-27 | ||
| US09/123,595 US6287474B1 (en) | 1998-07-27 | 1998-07-27 | Liquid treatment media regeneration apparatus and process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2278957A1 true CA2278957A1 (en) | 2000-01-27 |
| CA2278957C CA2278957C (en) | 2009-11-10 |
Family
ID=22409625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002278957A Expired - Lifetime CA2278957C (en) | 1998-07-27 | 1999-07-27 | Liquid treatment media regeneration apparatus and process |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US6287474B1 (en) |
| EP (1) | EP0976437B1 (en) |
| CA (1) | CA2278957C (en) |
| DE (1) | DE69932005T2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10888806B2 (en) * | 2013-11-12 | 2021-01-12 | William Bloomfield | Scrubbing backwash filter |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10015113C2 (en) * | 2000-03-28 | 2003-03-20 | Horst Chmiel | Process for removing constituents such as suspended matter and colloidal compounds from aqueous solutions |
| JP5201481B2 (en) * | 2008-06-19 | 2013-06-05 | 株式会社ナガオカ | Water treatment device and water treatment device filter medium cleaning method |
| WO2010036690A1 (en) * | 2008-09-24 | 2010-04-01 | Siemens Water Technologies Corp. | Water treatment methods |
| JP5845535B2 (en) * | 2011-07-25 | 2016-01-20 | 株式会社ナガオカ | Water treatment device upper layer cleaning device and water treatment device filter medium cleaning method |
| CN102784500B (en) * | 2012-08-14 | 2014-08-06 | 湖南娄底泰阳科技有限公司 | General in-situ regeneration device for polluted raw materials |
| GB201301028D0 (en) * | 2012-12-04 | 2013-03-06 | Enhydra Ltd | Filtration arrangement and method |
| AT522058B1 (en) * | 2019-02-06 | 2020-10-15 | Sonnek Eng Gmbh | Filter system for the treatment of contaminated liquids |
| CN111298749B (en) * | 2020-03-19 | 2022-02-22 | 中国热带农业科学院湛江实验站 | Bagasse cellulose and lignin centrifugal separation synchronous processing screening equipment |
| US11331616B2 (en) * | 2020-09-25 | 2022-05-17 | Mark Henderson | Pool filter assembly |
| US20230112945A1 (en) * | 2021-10-11 | 2023-04-13 | Mycelx Technologies Corporation | Backwashable media bed filtration system and drop in retrofit kit for same |
| ES2936229B2 (en) * | 2022-10-31 | 2023-12-20 | Hidrotuit S L U | FILTER CLEANING DEVICE FOR CANDELA LIQUIDS WITH FILTER MEDIA REGENERATION SYSTEM |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US748857A (en) * | 1904-01-05 | Filter | ||
| US632091A (en) * | 1899-04-01 | 1899-08-29 | Frederick Henry Bommarius | Filter. |
| US3550774A (en) * | 1968-01-09 | 1970-12-29 | Hydromation Eng Co | Method of and apparatus for filtering |
| US4162216A (en) * | 1977-10-25 | 1979-07-24 | Union Carbide Corporation | Process for removal of suspended solids from liquid |
| US4496464A (en) * | 1983-10-03 | 1985-01-29 | Hensley Clifford J | Filter apparatus and method |
| US4826609A (en) * | 1987-01-09 | 1989-05-02 | Hensley Clifford J | Filter media for filter systems |
| US5171443A (en) * | 1991-06-21 | 1992-12-15 | Bratten Jack R | Granular media regeneration apparatus |
| US5445740A (en) * | 1994-01-13 | 1995-08-29 | Malone; Ronald F. | Floating media biofilter |
-
1998
- 1998-07-27 US US09/123,595 patent/US6287474B1/en not_active Expired - Lifetime
-
1999
- 1999-07-23 DE DE69932005T patent/DE69932005T2/en not_active Expired - Lifetime
- 1999-07-23 EP EP99114538A patent/EP0976437B1/en not_active Expired - Lifetime
- 1999-07-27 CA CA002278957A patent/CA2278957C/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10888806B2 (en) * | 2013-11-12 | 2021-01-12 | William Bloomfield | Scrubbing backwash filter |
| US11291932B2 (en) | 2013-11-12 | 2022-04-05 | William Bloomfield | Scrubbing backwash filter |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0976437A2 (en) | 2000-02-02 |
| CA2278957C (en) | 2009-11-10 |
| DE69932005T2 (en) | 2007-01-18 |
| DE69932005D1 (en) | 2006-08-03 |
| US6287474B1 (en) | 2001-09-11 |
| EP0976437B1 (en) | 2006-06-21 |
| EP0976437A3 (en) | 2000-06-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |
Effective date: 20190729 |