FR2278378A1 - Filtration of water in sand bed filters - graded in decreasing particle size with increasing density - Google Patents

Filtration of water in sand bed filters - graded in decreasing particle size with increasing density

Info

Publication number
FR2278378A1
FR2278378A1 FR7425415A FR7425415A FR2278378A1 FR 2278378 A1 FR2278378 A1 FR 2278378A1 FR 7425415 A FR7425415 A FR 7425415A FR 7425415 A FR7425415 A FR 7425415A FR 2278378 A1 FR2278378 A1 FR 2278378A1
Authority
FR
France
Prior art keywords
bed
particle size
water
filtration
graded
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
Application number
FR7425415A
Other languages
French (fr)
Other versions
FR2278378B1 (en
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.)
ERPAC
Original Assignee
ERPAC
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 ERPAC filed Critical ERPAC
Priority to FR7425415A priority Critical patent/FR2278378A1/en
Publication of FR2278378A1 publication Critical patent/FR2278378A1/en
Application granted granted Critical
Publication of FR2278378B1 publication Critical patent/FR2278378B1/fr
Granted 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
    • B01D24/007—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with multiple filtering elements in series connection
    • B01D24/008—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with multiple filtering elements in series connection arranged concentrically or coaxially
    • 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
    • B01D24/18—Combined upward and downward filtration
    • B01D24/183—Combined upward and 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
    • 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
    • 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
    • B01D24/4684—Regenerating the filtering material in the filter by moving the filtering element using spray devices

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtration Of Liquid (AREA)
  • Filtering Materials (AREA)

Abstract

Sand-bed type filter employing a number of grain sizes of media should be arranged such that flow is through the largest grain bed first to remove coarse material and through the finest grain bed last. Bed materials are chosen so that they separate by gravity into beds of particle size required for efficient filtration, i.e. flow is through beds of decreasing grain size. To replace conventional sand-bed and mixed media filters in the treatment of water.
FR7425415A 1974-07-16 1974-07-16 Filtration of water in sand bed filters - graded in decreasing particle size with increasing density Granted FR2278378A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7425415A FR2278378A1 (en) 1974-07-16 1974-07-16 Filtration of water in sand bed filters - graded in decreasing particle size with increasing density

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7425415A FR2278378A1 (en) 1974-07-16 1974-07-16 Filtration of water in sand bed filters - graded in decreasing particle size with increasing density

Publications (2)

Publication Number Publication Date
FR2278378A1 true FR2278378A1 (en) 1976-02-13
FR2278378B1 FR2278378B1 (en) 1984-03-09

Family

ID=9141554

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7425415A Granted FR2278378A1 (en) 1974-07-16 1974-07-16 Filtration of water in sand bed filters - graded in decreasing particle size with increasing density

Country Status (1)

Country Link
FR (1) FR2278378A1 (en)

Also Published As

Publication number Publication date
FR2278378B1 (en) 1984-03-09

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Legal Events

Date Code Title Description
ST Notification of lapse