GB1487914A - Filtration - Google Patents

Filtration

Info

Publication number
GB1487914A
GB1487914A GB46031/73A GB4603173A GB1487914A GB 1487914 A GB1487914 A GB 1487914A GB 46031/73 A GB46031/73 A GB 46031/73A GB 4603173 A GB4603173 A GB 4603173A GB 1487914 A GB1487914 A GB 1487914A
Authority
GB
United Kingdom
Prior art keywords
layer
density
dia
particles
bed
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
GB46031/73A
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.)
BOC Group Ltd
Original Assignee
BOC International Ltd
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 BOC International Ltd filed Critical BOC International Ltd
Priority to GB46031/73A priority Critical patent/GB1487914A/en
Priority to ZA00745992A priority patent/ZA745992B/en
Priority to AU73734/74A priority patent/AU493362B2/en
Priority to ES430422A priority patent/ES430422A1/en
Priority to BR8115/74A priority patent/BR7408115A/en
Publication of GB1487914A publication Critical patent/GB1487914A/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
    • B01D24/007—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
    • B01D24/12—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
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/14—Particulate filter materials with a lower density than the liquid mixture to be filtered
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/18—Filters characterised by the openings or pores
    • B01D2201/188—Multiple filtering elements having filtering areas of different size

Landscapes

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

Abstract

1487914 'Sand type' filter B O C INTERNATIONAL Ltd 26 Sept 1974 [2 Oct 1973] 46031/73 Heading B1D A downward flow filter bed comprises at least two layers of particles whose densities increase and whose size decrease from one layer to the next downwards and a bottom layer of particles of greatest density. From the smallest particles in the bed to the bottom the size increases progressively downwards. When the bed is fluidised in reverse flow cleaning the layers will resettle in their original order. As shown layer 12 comprises polystyrene spheres of density 1.05 and 10mm dia., layer 14 anthracite, density 1.4, 5 mm dia., layer 16, quartz sand, density 2.6, dia 0.6 and layer 18, garnet density 3.8 and dia. ranging from 0.6 at the top to 7 mm at the bottom. Layer 18 could be basalt. The particles in layer 16 could vary in size.
GB46031/73A 1973-10-02 1973-10-02 Filtration Expired GB1487914A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB46031/73A GB1487914A (en) 1973-10-02 1973-10-02 Filtration
ZA00745992A ZA745992B (en) 1973-10-02 1974-09-20 Filtration
AU73734/74A AU493362B2 (en) 1973-10-02 1974-09-26 Gravity filter
ES430422A ES430422A1 (en) 1973-10-02 1974-09-26 Filtration
BR8115/74A BR7408115A (en) 1973-10-02 1974-09-30 FILTER FOR DOWNWARD FILTRATION

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB46031/73A GB1487914A (en) 1973-10-02 1973-10-02 Filtration

Publications (1)

Publication Number Publication Date
GB1487914A true GB1487914A (en) 1977-10-05

Family

ID=10439562

Family Applications (1)

Application Number Title Priority Date Filing Date
GB46031/73A Expired GB1487914A (en) 1973-10-02 1973-10-02 Filtration

Country Status (4)

Country Link
BR (1) BR7408115A (en)
ES (1) ES430422A1 (en)
GB (1) GB1487914A (en)
ZA (1) ZA745992B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2116445A (en) * 1982-03-16 1983-09-28 Paterson Candy Int A filter for and a method of removing solids from liquids
EP0175956A2 (en) * 1984-08-29 1986-04-02 INTERNATIONAL MINERALS & CHEMICAL CORPORATION Sand filter media and an improved method of purifying water
FR2610653A1 (en) * 1987-02-05 1988-08-12 Hoarau Patrick Anti-clogging prefilter device using an interchangeable cartridge incorporated in septic tanks
US7029578B2 (en) 2000-11-03 2006-04-18 Spruce International Separations Water treatment system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2116445A (en) * 1982-03-16 1983-09-28 Paterson Candy Int A filter for and a method of removing solids from liquids
EP0175956A2 (en) * 1984-08-29 1986-04-02 INTERNATIONAL MINERALS & CHEMICAL CORPORATION Sand filter media and an improved method of purifying water
EP0175956A3 (en) * 1984-08-29 1987-05-20 INTERNATIONAL MINERALS & CHEMICAL CORPORATION Sand filter media and an improved method of purifying water
FR2610653A1 (en) * 1987-02-05 1988-08-12 Hoarau Patrick Anti-clogging prefilter device using an interchangeable cartridge incorporated in septic tanks
US7029578B2 (en) 2000-11-03 2006-04-18 Spruce International Separations Water treatment system

Also Published As

Publication number Publication date
ES430422A1 (en) 1976-10-16
BR7408115A (en) 1975-11-04
ZA745992B (en) 1975-09-24
AU7373474A (en) 1976-04-01

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee