FR344396A - Device for cleaning the surfaces of sand filters and others - Google Patents

Device for cleaning the surfaces of sand filters and others

Info

Publication number
FR344396A
FR344396A FR344396A FR344396DA FR344396A FR 344396 A FR344396 A FR 344396A FR 344396 A FR344396 A FR 344396A FR 344396D A FR344396D A FR 344396DA FR 344396 A FR344396 A FR 344396A
Authority
FR
France
Prior art keywords
cleaning
sand filters
sand
filters
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.)
Expired
Application number
FR344396A
Other languages
French (fr)
Inventor
Hiram Wheeler Blaisdell
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of FR344396A publication Critical patent/FR344396A/en
Expired legal-status Critical Current

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
    • B01D24/02—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
    • B01D24/20—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 provided in an open container
    • B01D24/205—Downward filtration without specifications about the filter material supporting means
    • 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
    • B01D24/4605—Regenerating the filtering material in the filter by scrapers, brushes, nozzles or the like placed on the cake-side of the stationary filtering material and only contacting the external layer
    • B01D24/461—Regenerating the filtering material in the filter by scrapers, brushes, nozzles or the like placed on the cake-side of the stationary filtering material and only contacting the external layer by scrapers
    • 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
    • B01D24/4876—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 in which the filtering elements are moved between filtering operations; particular measures for removing or replacing the filtering elements

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
FR344396A 1904-06-28 1904-06-28 Device for cleaning the surfaces of sand filters and others Expired FR344396A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR344396T 1904-06-28

Publications (1)

Publication Number Publication Date
FR344396A true FR344396A (en) 1904-11-03

Family

ID=1393272

Family Applications (1)

Application Number Title Priority Date Filing Date
FR344396A Expired FR344396A (en) 1904-06-28 1904-06-28 Device for cleaning the surfaces of sand filters and others

Country Status (1)

Country Link
FR (1) FR344396A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0310221A1 (en) * 1987-10-02 1989-04-05 Thames Water Utilities Limited Slow sand filter cleaning device
EP0450913A2 (en) * 1990-04-03 1991-10-09 Smalley Excavators Ltd A vehicle for skimming a surface

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0310221A1 (en) * 1987-10-02 1989-04-05 Thames Water Utilities Limited Slow sand filter cleaning device
US4911831A (en) * 1987-10-02 1990-03-27 Thames Water Authority Slow sand filters
EP0450913A2 (en) * 1990-04-03 1991-10-09 Smalley Excavators Ltd A vehicle for skimming a surface
EP0450913A3 (en) * 1990-04-03 1992-02-26 Smalley Excavators Ltd A vehicle for skimming a surface

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