FR2336964A1 - Liquid filter with granular bed - has gravity back-washing automatically controlled by non-return valve opening at preset pressure - Google Patents
Liquid filter with granular bed - has gravity back-washing automatically controlled by non-return valve opening at preset pressureInfo
- Publication number
- FR2336964A1 FR2336964A1 FR7638865A FR7638865A FR2336964A1 FR 2336964 A1 FR2336964 A1 FR 2336964A1 FR 7638865 A FR7638865 A FR 7638865A FR 7638865 A FR7638865 A FR 7638865A FR 2336964 A1 FR2336964 A1 FR 2336964A1
- Authority
- FR
- France
- Prior art keywords
- chamber
- accumulation chamber
- washing
- liq
- level
- 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
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
- B01D24/48—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof integrally combined with devices for controlling the filtration
- B01D24/4884—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof 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
- 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
- B01D24/4631—Counter-current flushing, e.g. by air
-
- 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
- B01D2201/206—Systems for applying vacuum to filters by the weight of the liquid in a tube, e.g. siphon, barometric leg
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtration Of Liquid (AREA)
Abstract
The filter includes a filtering layer of granular material supported on a nozzled base that sits above an inlet chamber for liq. to be filtered. Above the filter layer is a filtrate accumulation chamber also acting as a header for back washing of the filter layer. A filtrate outlet is fitted at the height of the free liq. level in the accumulation chamber. A back-washing pipe connects into the inlet chamber and extends up to a return elbow positioned below the free liq. level in the accumulation chamber. In this pipe is a non-return valve that opens when a predetermined press. is reached in the inlet chamber to allow back-flow of filtrate from the accumulation chamber. Connected into the elbow from the accumulation chamber is a flow break pipe that stops the back-washing when the level of the liq. in the accumulation chamber falls to a set level. Used for the gravity filtration of silted water. System shortens the back-washing pipe and does not require then intermediary lid of the filter chamber necessary in past installations. A more reliable press. loss is obtd in the filter layer simply by keeping the inlet water under high pressure.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2600193A DE2600193B2 (en) | 1976-01-05 | 1976-01-05 | Filter system |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2336964A1 true FR2336964A1 (en) | 1977-07-29 |
FR2336964B1 FR2336964B1 (en) | 1980-09-26 |
Family
ID=5967045
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7638865A Granted FR2336964A1 (en) | 1976-01-05 | 1976-12-23 | Liquid filter with granular bed - has gravity back-washing automatically controlled by non-return valve opening at preset pressure |
Country Status (7)
Country | Link |
---|---|
AT (1) | AT365083B (en) |
BE (1) | BE850071A (en) |
DE (1) | DE2600193B2 (en) |
FR (1) | FR2336964A1 (en) |
IT (1) | IT1074214B (en) |
NL (1) | NL7614595A (en) |
YU (1) | YU302076A (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1183050B (en) * | 1957-06-13 | 1964-12-10 | Pfaudler Permutit Inc | Backwashable filter system |
FR2026341A1 (en) * | 1968-12-17 | 1970-09-18 | Permutit Ag | Water purifcn using a hydophoretic tank - tank |
AT297615B (en) * | 1970-06-22 | 1972-04-10 | Bran & Luebbe Ges M B H | Gravel filter for water |
US3841485A (en) * | 1972-05-08 | 1974-10-15 | Permutit Co Inc | Automatically backwashed gravity filter |
-
1976
- 1976-01-05 DE DE2600193A patent/DE2600193B2/en active Granted
- 1976-11-25 AT AT0875976A patent/AT365083B/en active
- 1976-12-09 IT IT52541/76A patent/IT1074214B/en active
- 1976-12-10 YU YU03020/76A patent/YU302076A/en unknown
- 1976-12-23 FR FR7638865A patent/FR2336964A1/en active Granted
- 1976-12-30 NL NL7614595A patent/NL7614595A/en not_active Application Discontinuation
-
1977
- 1977-01-04 BE BE173822A patent/BE850071A/en unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1183050B (en) * | 1957-06-13 | 1964-12-10 | Pfaudler Permutit Inc | Backwashable filter system |
FR2026341A1 (en) * | 1968-12-17 | 1970-09-18 | Permutit Ag | Water purifcn using a hydophoretic tank - tank |
AT297615B (en) * | 1970-06-22 | 1972-04-10 | Bran & Luebbe Ges M B H | Gravel filter for water |
US3841485A (en) * | 1972-05-08 | 1974-10-15 | Permutit Co Inc | Automatically backwashed gravity filter |
Also Published As
Publication number | Publication date |
---|---|
DE2600193C3 (en) | 1979-03-22 |
IT1074214B (en) | 1985-04-17 |
DE2600193A1 (en) | 1977-07-14 |
NL7614595A (en) | 1977-07-07 |
YU302076A (en) | 1982-05-31 |
FR2336964B1 (en) | 1980-09-26 |
ATA875976A (en) | 1981-05-15 |
DE2600193B2 (en) | 1978-07-27 |
BE850071A (en) | 1977-07-04 |
AT365083B (en) | 1981-12-10 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |