IL46322A - Screening apparatus - Google Patents

Screening apparatus

Info

Publication number
IL46322A
IL46322A IL46322A IL4632274A IL46322A IL 46322 A IL46322 A IL 46322A IL 46322 A IL46322 A IL 46322A IL 4632274 A IL4632274 A IL 4632274A IL 46322 A IL46322 A IL 46322A
Authority
IL
Israel
Prior art keywords
screening medium
medium
bars
adjacent
solids
Prior art date
Application number
IL46322A
Other versions
IL46322A0 (en
Original Assignee
Hydrocyclonics Corp
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 US435163A external-priority patent/US3876548A/en
Application filed by Hydrocyclonics Corp filed Critical Hydrocyclonics Corp
Publication of IL46322A0 publication Critical patent/IL46322A0/en
Publication of IL46322A publication Critical patent/IL46322A/en

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
    • B01D33/067—Construction of the filtering drums, e.g. mounting or sealing arrangements
    • 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
    • B01D33/06—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums
    • B01D33/11—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums arranged for outward 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
    • B01D33/27—Filters with filtering elements which move during the filtering operation with rotary filtering surfaces, which are neither cylindrical nor planar, e.g. helical surfaces
    • B01D33/275—Filters with filtering elements which move during the filtering operation with rotary filtering surfaces, which are neither cylindrical nor planar, e.g. helical surfaces using contiguous impervious surfaces
    • 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
    • B01D33/35—Filters with filtering elements which move during the filtering operation with multiple filtering elements characterised by their mutual disposition
    • B01D33/37—Filters with filtering elements which move during the filtering operation with multiple filtering elements characterised by their mutual disposition in parallel connection
    • B01D33/39—Filters with filtering elements which move during the filtering operation with multiple filtering elements characterised by their mutual disposition in parallel connection concentrically or coaxially
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/44—Edge filtering elements, i.e. using contiguous impervious surfaces
    • B01D29/48—Edge filtering elements, i.e. using contiguous impervious surfaces of spirally or helically wound bodies

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtration Of Liquid (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
  • Processing Of Solid Wastes (AREA)
  • Treatment Of Sludge (AREA)
  • Water Treatment By Sorption (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Centrifugal Separators (AREA)

Claims (1)

1. 46322/2 WHAT WE CLAIM IS: * l.i In a device for separating and dewatering the generally spongy solids from the liquid in sanitary sewage, food processing, meat packing and the like, Including a cylindrical screen having a screening medium about its outer periphery made up of spaced circumferentially arranged, generally parallel bars surrounding a generally open interior, means supporting the screening medium for rotation about a generally horizontal axis so that the surface of the screening medium is rising on one side and descending on the other, means for rotating) the screening medium, a head-box containing a liquid-solid medium to be separated directly adjacent the surface of the screening medium and opening against the rising side thereof above a horizontal plane through its axis, a solids discharge adjacent the outer surface of the screening medium and spaced from the headbox in the direction of its rotation and beyond a vertical plane through its axis, movement of the screening medium carrying the separated solids from the headbox toward the solids discharge with the majority of the liquid passing through the screening medium at the headbox and falling freely in a cascading column down to the bottom area of the screening medium tovard the Inner surface of the medium primarily in an area on the rising side below the horizontal plane through its axis, the bars that make up the screening medium each having a generally flat outer face which, as a group, make up a cylindrical, generally smooth exterior surface with limited openings between adjacent bars to effect maximum separation adjacent the headbox followed by transportation of the separated solids to the solids discharge, the bars having inwardly diverging sides which define upwardly opening cleaning troughs at the bottom of the cascading column, the side of one bar defining an included angle with the opposed side of an adjacent bar greate than about 14° and less than about 90°, with ratio of screen diameter to radial bar thickness being no less than about: 75.i 46322/2 f 2. The structure of claim 1 further characterised In that the Included, angle between the opposed sides of adjacent bars Is on the order of 26 3. The structure of claim 1 further characterised in that the separation of the bars is on the order of 0*060 Inches*1 4. The structure of claim 1 characterised in that the medium is at least 11 inches in diameter so as to provide a substantial free fall of the liquid resulting in appreciable impact when the liquid hits the bottom area of the medium no less than about 75» 5» The structure of claim 4 further characterised In that the included angle between the opposed sides of adjacent bars is on the order of 26°. 6·1 The structure of claim 4 further characterised in that the separation of the bars is uniform* from one end of the screening medium to the other and on the order of 0*060 Inches·' 7.1 The structure of claim 4 further characterised in that the axle of the screening medium Is arranged generally horizontal·> 8. The structure of claim 4 further characterised in that the headbox is on one side of the screening medium and opens against the rising side thereof and the solids-discharge Is on the other side of the screening medium beyond a vertical plane through the axis of the screening medium and on the descending side thereof*I 9. The structure of claim 1 characterised in that the headbox opens against th medium at a point above a plane through its axis with limited openings between adjacent bars to effect that make up the screening medium* the bars having inwardly diverging sides which define downwardly opening liquid-collecting cleaning troughs at the bottom of the cascading column with the included angle between the opposed sides of adjacent bare being at a predetermined angle great enough so that the spongy solids will not clog to any appreciable extent between the opposed faces on top and will clear when subjected to the Impact of the cascading column at the bottom. & -~o — _ CCHBN Z8SBK & SPISBACH P.O. BOX 33116, TEL AVIV.,
IL46322A 1974-01-21 1974-12-23 Screening apparatus IL46322A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US435163A US3876548A (en) 1972-06-22 1974-01-21 Screening method and apparatus

Publications (2)

Publication Number Publication Date
IL46322A0 IL46322A0 (en) 1975-03-13
IL46322A true IL46322A (en) 1976-09-30

Family

ID=23727264

Family Applications (1)

Application Number Title Priority Date Filing Date
IL46322A IL46322A (en) 1974-01-21 1974-12-23 Screening apparatus

Country Status (8)

Country Link
JP (1) JPS5439067B2 (en)
BR (1) BR7500366A (en)
DK (1) DK145527C (en)
ES (1) ES433780A1 (en)
FI (1) FI57215C (en)
IL (1) IL46322A (en)
NO (1) NO139337C (en)
SE (1) SE7415877L (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5627943Y2 (en) * 1977-11-29 1981-07-03
JPH04160314A (en) * 1990-10-24 1992-06-03 Unyusho Daisan Kowan Kensetsu Kyokucho Self-standing underwater staff device
CN104492686A (en) * 2014-12-14 2015-04-08 重庆市极鼎食品有限责任公司 Roller type food sorting machine

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2294179A (en) * 1938-10-18 1942-08-25 Hawley Engineering Corp Method for screening burdened fluids
US3640383A (en) * 1969-08-01 1972-02-08 Wedge Wire Corp Screening apparatus and method
JPS471821U (en) * 1971-01-25 1972-08-21

Also Published As

Publication number Publication date
FI57215B (en) 1980-03-31
NO139337B (en) 1978-11-13
BR7500366A (en) 1975-11-04
JPS50103753A (en) 1975-08-16
ES433780A1 (en) 1977-02-16
JPS5439067B2 (en) 1979-11-26
DK145527B (en) 1982-12-06
IL46322A0 (en) 1975-03-13
FI750093A (en) 1975-07-22
NO750156L (en) 1975-08-18
FI57215C (en) 1980-07-10
DK145527C (en) 1983-05-09
SE7415877L (en) 1975-07-22
NO139337C (en) 1979-02-21
DK689274A (en) 1975-10-13

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