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NO171299C - RETURNABLE FILTER SYSTEM - Google Patents

RETURNABLE FILTER SYSTEM

Info

Publication number
NO171299C
NO171299C NO883866A NO883866A NO171299C NO 171299 C NO171299 C NO 171299C NO 883866 A NO883866 A NO 883866A NO 883866 A NO883866 A NO 883866A NO 171299 C NO171299 C NO 171299C
Authority
NO
Norway
Prior art keywords
washing
sludge liquor
outflow
arrangement
water
Prior art date
Application number
NO883866A
Other languages
Norwegian (no)
Other versions
NO883866D0 (en
NO171299B (en
NO883866L (en
Inventor
Ernst Keller
Original Assignee
Sulzer Ag
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 Sulzer Ag filed Critical Sulzer Ag
Publication of NO883866D0 publication Critical patent/NO883866D0/en
Publication of NO883866L publication Critical patent/NO883866L/en
Publication of NO171299B publication Critical patent/NO171299B/en
Publication of NO171299C publication Critical patent/NO171299C/en

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
    • B01D24/46—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
    • B01D24/02—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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Centrifugal Separators (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Biological Treatment Of Waste Water (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Treatment Of Sludge (AREA)
  • Glass Compositions (AREA)
  • Transplanting Machines (AREA)
  • Percussion Or Vibration Massage (AREA)

Abstract

A corrugated arrangement (15) is installed in the overdam chamber (3) of a filter tank (1) in such a way that, with the sludge liquor flap (8) being partially opened, direct outflow of the whirled-up granular filter material in the sludge liquor outflow (5) - and hence loss of filter material - is prevented. As a result of the novel arrangement (15), the washing water stream during the washing phase with air and water is quietened in the overdam chamber (3), so that the whirled-up grains can settle on the arrangement (15) and on the fixed bed (2) before the washing water passes into the sludge liquor outflow (5). In this way, it is possible partially to open the sludge liquor flap (8) even during the washing phase with air and water; this is desirable, for example in effluent filtration, in order to discharge relatively heavy suspended materials or to let the washing step proceed within a short time. <IMAGE>
NO883866A 1987-09-01 1988-08-30 RETURNABLE FILTER SYSTEM NO171299C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH3346/87A CH672892A5 (en) 1987-09-01 1987-09-01

Publications (4)

Publication Number Publication Date
NO883866D0 NO883866D0 (en) 1988-08-30
NO883866L NO883866L (en) 1989-03-02
NO171299B NO171299B (en) 1992-11-16
NO171299C true NO171299C (en) 1993-02-24

Family

ID=4253986

Family Applications (1)

Application Number Title Priority Date Filing Date
NO883866A NO171299C (en) 1987-09-01 1988-08-30 RETURNABLE FILTER SYSTEM

Country Status (7)

Country Link
EP (1) EP0305606B1 (en)
AT (1) ATE73002T1 (en)
CH (1) CH672892A5 (en)
DE (1) DE3777181D1 (en)
DK (1) DK167272B1 (en)
ES (1) ES2031121T3 (en)
NO (1) NO171299C (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT397927B (en) * 1992-05-27 1994-08-25 Chemiefaser Lenzing Ag BACKFLOWABLE FILTER DEVICE FOR FILTRATION OF HIGH VISCUS LIQUIDS
DE4440060C1 (en) * 1994-11-10 1996-03-07 Wama Wasseraufbereitungsanlage Back-washable filtration system
CN1310696C (en) * 2005-01-14 2007-04-18 珠海市沃特金水处理技术有限公司 Flap valve and flap filter tank

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1033183B (en) * 1952-06-16 1958-07-03 Kommandit Ges Kary Device for separating granular filter material when backwashing filters
US2888140A (en) * 1958-08-08 1959-05-26 Raymond E Hebert Filter baffles
US4076625A (en) * 1976-01-16 1978-02-28 General Filter Company Baffle and wash trough assembly for granular-media filters
GB2118452B (en) * 1982-04-21 1986-06-18 Permutit Boby Ltd Filtration method and apparatus
US4478726A (en) * 1982-10-26 1984-10-23 Blue Circle Projects (Proprietary) Limited Particulate filter backwash outlet

Also Published As

Publication number Publication date
DK376988D0 (en) 1988-07-06
NO883866D0 (en) 1988-08-30
CH672892A5 (en) 1990-01-15
DK167272B1 (en) 1993-10-04
ES2031121T3 (en) 1992-12-01
ATE73002T1 (en) 1992-03-15
DE3777181D1 (en) 1992-04-09
DK376988A (en) 1989-03-02
NO171299B (en) 1992-11-16
EP0305606A1 (en) 1989-03-08
NO883866L (en) 1989-03-02
EP0305606B1 (en) 1992-03-04

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