GB1487914A – Filtration
– Google Patents
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
1973-10-02
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.)
1973-10-02
Filing date
1973-10-02
Publication date
1977-10-05
1973-10-02
Application filed by BOC International Ltd
filed
Critical
BOC International Ltd
1973-10-02
Priority to GB46031/73A
priority
Critical
patent/GB1487914A/en
1974-09-20
Priority to ZA00745992A
priority
patent/ZA745992B/en
1974-09-26
Priority to AU73734/74A
priority
patent/AU493362B2/en
1974-09-26
Priority to ES430422A
priority
patent/ES430422A1/en
1974-09-30
Priority to BR8115/74A
priority
patent/BR7408115A/en
1977-10-05
Publication of GB1487914A
publication
Critical
patent/GB1487914A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
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
1973
1973-10-02
GB
GB46031/73A
patent/GB1487914A/en
not_active
Expired
1974
1974-09-20
ZA
ZA00745992A
patent/ZA745992B/en
unknown
1974-09-26
ES
ES430422A
patent/ES430422A1/en
not_active
Expired
1974-09-30
BR
BR8115/74A
patent/BR7408115A/en
unknown
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
BR7408115A
(en)
1975-11-04
AU7373474A
(en)
1976-04-01
ES430422A1
(en)
1976-10-16
ZA745992B
(en)
1975-09-24
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Legal Events
Date
Code
Title
Description
1978-02-15
PS
Patent sealed
1981-04-29
PCNP
Patent ceased through non-payment of renewal fee
