WO1991016961A1 - Filtre - Google Patents

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Info

Publication number
WO1991016961A1
WO1991016961A1 PCT/GB1991/000647 GB9100647W WO9116961A1 WO 1991016961 A1 WO1991016961 A1 WO 1991016961A1 GB 9100647 W GB9100647 W GB 9100647W WO 9116961 A1 WO9116961 A1 WO 9116961A1
Authority
WO
WIPO (PCT)
Prior art keywords
liquid
filtration
passage
elongate member
rotation
Prior art date
Application number
PCT/GB1991/000647
Other languages
English (en)
Inventor
Stuart Hopton Small
Original Assignee
Nytek A/S
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
Priority claimed from GB909009953A external-priority patent/GB9009953D0/en
Application filed by Nytek A/S filed Critical Nytek A/S
Priority claimed from US07/674,360 external-priority patent/US5156778A/en
Publication of WO1991016961A1 publication Critical patent/WO1991016961A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/06—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums
    • B01D33/073—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums arranged for inward flow filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/44—Regenerating the filter material in the filter
    • B01D33/52—Regenerating the filter material in the filter by forces created by movement of the filter element
    • B01D33/56—Regenerating the filter material in the filter by forces created by movement of the filter element involving centrifugal force
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/58—Handling the filter cake in the filter for purposes other than for regenerating the filter cake remaining on the filtering element
    • B01D33/68—Retarding cake deposition on the filter during the filtration period, e.g. using stirrers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/70—Filters with filtering elements which move during the filtering operation having feed or discharge devices
    • B01D33/72—Filters with filtering elements which move during the filtering operation having feed or discharge devices for feeding
    • B01D33/722—Filters with filtering elements which move during the filtering operation having feed or discharge devices for feeding containing fixed liquid displacement elements or cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/70—Filters with filtering elements which move during the filtering operation having feed or discharge devices
    • B01D33/74—Filters with filtering elements which move during the filtering operation having feed or discharge devices for discharging filtrate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/70—Filters with filtering elements which move during the filtering operation having feed or discharge devices
    • B01D33/76—Filters with filtering elements which move during the filtering operation having feed or discharge devices for discharging the filter cake, e.g. chutes
    • B01D33/763—Filters with filtering elements which move during the filtering operation having feed or discharge devices for discharging the filter cake, e.g. chutes for continuously discharging concentrated liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/28—Position of the filtering element
    • B01D2201/287—Filtering elements with a vertical or inclined rotation or symmetry axis

Definitions

  • This invention relates to filters.
  • Background of the Invention Various devices are known, in which a liquid is purified by being filtered, and in which some means is provided in order to prevent solids in the impure liquid from aggregating on the filter. See, for example, GB-A-2114460. Summary of the Invention
  • a novel filtration device is adapted for use in the filtration of fluids, comprising an elongate member including an internal passage; and, mounted for rotation on the elongate member and in communication with the passage, one or more essentially cylindrical filtration members through which, on rotation through a liquid, filtered liquid can pass and thence into the passage.
  • the pressure inside the axial passage is lower than the pressure at the filter (the periphery of the cylinder) .
  • Fig. 1 shows a filter drum 1, attached to a shaft 2, below the surface 3 of a liquid.
  • the interior of the drum is connected to the atmosphere above by a right-angled tube 4.
  • the pressure inside the drum is decreased by the pumping action of the rotating right- angled tube.
  • Liquid is drawn into the drum through the peripheral filter 5 and ejected via an outlet 6, e.g. into some form of collection trough 7 as indicated.
  • the outer surface of the peripheral filter is kept from clogging by a strong combination of shear and centrifugal forces which can be assisted by adding suitable abrasive particles to the liquid being aerated.
  • the non-clogging action of the rotating filter can also be supplemented by scraper blades positioned just clear of the filter surface, and/or by mounting an impeller on the shaft. Measures can also be taken by suitable design of an aerator, to accelerate the flow of unfiltered liquid past the filter surface, thereby reinforcing the overall non-clogging action.
  • An example of such a construction is illustrated in Fig. 2.
  • Fig. 2 shows rotors
  • the rotors are designed, on rotation, to gasify the liquid by drawing gas down through the shaft and along radial passages, as described in WO-A-
  • aeration efficiency will be significantly enhanced by bubble fractionation due to rotor-induced shear forces.
  • the operation of rotors in suitable eductor tube housings will produce intense circulatory mixing even of relatively thick slurries.
  • Apparatus of the invention including suitable design of rotors and stators should be capable of providing almost any degree of grinding of suspended solids. Farm slurries and domestic wastes in particular should present no problems.
  • venturi members may be mounted on a common shaft at different depths and/or within a cylinder which thereby limits the volume of liquid undergoing immediate treatment; the cylinder can be placed in a larger volume of liquid, and treatment throughout the volume of liquid is caused as a result of fluid flow through the cylinder.
  • WO-A-9005582 published 31st May 1990
  • this invention relates to apparatus etc. that is novel with respect to WO-A-9005582.

Landscapes

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

Abstract

Un dispositif conçu pour s'utiliser dans la filtration de liquides, comprend un élément allongé (2) pourvu d'un passage interne (4); un ou plusieurs éléments de filtration essentiellement cylindriques (1) sont montés pour tourner sur l'élément allongé (2) et communiquer avec le passage (4); le liquide filtré peut traverser lesdits éléments de filtration, lorsqu'ils sont en rotation dans le liquide, et s'introduire ensuite dans le passage (4).
PCT/GB1991/000647 1990-05-03 1991-04-23 Filtre WO1991016961A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB909009953A GB9009953D0 (en) 1990-05-03 1990-05-03 Filter
GB9009953.2 1990-05-03
US07/674,360 US5156778A (en) 1988-11-23 1991-05-10 Mixing device

Publications (1)

Publication Number Publication Date
WO1991016961A1 true WO1991016961A1 (fr) 1991-11-14

Family

ID=26297030

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1991/000647 WO1991016961A1 (fr) 1990-05-03 1991-04-23 Filtre

Country Status (1)

Country Link
WO (1) WO1991016961A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999029393A1 (fr) * 1997-12-09 1999-06-17 Kevin Douglas Mcgrath Appareil de filtrage
WO2013098650A3 (fr) * 2011-12-30 2013-08-29 Spx Apv Danmark A/S Tamis rotatif

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE539094C (de) * 1931-11-20 Buckau R Wolf Akt Ges Maschf Filterpatronen-Eindicker
FR2146532A5 (en) * 1971-07-16 1973-03-02 Guerin Sa Pierre Liquid/solid phase sepn - eg sepn of curds from whey in cheese mfr
FR2148732A5 (fr) * 1971-07-30 1973-03-23 Inst Francais Du Petrole
FR2247270A1 (fr) * 1973-10-12 1975-05-09 Hitachi Ltd

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE539094C (de) * 1931-11-20 Buckau R Wolf Akt Ges Maschf Filterpatronen-Eindicker
FR2146532A5 (en) * 1971-07-16 1973-03-02 Guerin Sa Pierre Liquid/solid phase sepn - eg sepn of curds from whey in cheese mfr
FR2148732A5 (fr) * 1971-07-30 1973-03-23 Inst Francais Du Petrole
FR2247270A1 (fr) * 1973-10-12 1975-05-09 Hitachi Ltd

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999029393A1 (fr) * 1997-12-09 1999-06-17 Kevin Douglas Mcgrath Appareil de filtrage
US6416665B1 (en) 1997-12-09 2002-07-09 Mcgrath Kevin Douglas Filtration apparatus
WO2013098650A3 (fr) * 2011-12-30 2013-08-29 Spx Apv Danmark A/S Tamis rotatif
US8871100B2 (en) 2011-12-30 2014-10-28 SPX APV Denmark A/S Rotating strainer
CN104159442A (zh) * 2011-12-30 2014-11-19 Spxapv丹麦公司 旋转过滤器
CN104159442B (zh) * 2011-12-30 2016-09-21 Spxapv丹麦公司 旋转过滤器

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