EP0145365A3 - Rotary pulp screen of the vertical pressure type having pulp stock feed at different axial positions on the screen - Google Patents

Rotary pulp screen of the vertical pressure type having pulp stock feed at different axial positions on the screen Download PDF

Info

Publication number
EP0145365A3
EP0145365A3 EP84308039A EP84308039A EP0145365A3 EP 0145365 A3 EP0145365 A3 EP 0145365A3 EP 84308039 A EP84308039 A EP 84308039A EP 84308039 A EP84308039 A EP 84308039A EP 0145365 A3 EP0145365 A3 EP 0145365A3
Authority
EP
European Patent Office
Prior art keywords
screen
pulp
impeller
rotary
screening device
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.)
Granted
Application number
EP84308039A
Other versions
EP0145365B1 (en
EP0145365A2 (en
Inventor
Anthony William Hooper
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.)
Uniweld Inc
Original Assignee
Uniweld Inc
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 Uniweld Inc filed Critical Uniweld Inc
Priority to AT84308039T priority Critical patent/ATE58403T1/en
Publication of EP0145365A2 publication Critical patent/EP0145365A2/en
Publication of EP0145365A3 publication Critical patent/EP0145365A3/en
Application granted granted Critical
Publication of EP0145365B1 publication Critical patent/EP0145365B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
    • D21D5/02—Straining or screening the pulp
    • D21D5/023—Stationary screen-drums
    • D21D5/026—Stationary screen-drums with rotating cleaning foils

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Refuse Collection And Transfer (AREA)
  • Confectionery (AREA)

Abstract

A rotary pulp screening device (10) of the vertical type has a screen (25) which provides a streamline flow of pulp-stock, there being a fairly constant flow of pulp through the screen from top to bottom, thus utilising the full height of the screen. The screening device includes a generally cylindrical housing (11) with a vertical cylindrical screen (25) therein, a rotary impeller (30) mounted for rotation within the screen, the impeller having a body whose top is substantially level with the disc ring and bottom is adjacent the lower end of the cylindrical screen, the body having a shape with circular axial cross section from the top to the bottom, whose diameter increases from the top to the bottom thus leaving a larger annular space at the top, and impeller blades (35) radiating from at least a portion of the body of the impeller and extending to within a short distance from the screen for the height of the screen. The improvement comprises at least one substantially frusto-conical shaped baffle (41) concentric with the body of the impeller, extending down from the top of the screen (25) adapted to divide flow of pulp stock entering the screening device, and direct the divided flows to different vertical locations on the pulp screen.
EP84308039A 1983-12-12 1984-11-20 Rotary pulp screen of the vertical pressure type having pulp stock feed at different axial positions on the screen Expired - Lifetime EP0145365B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84308039T ATE58403T1 (en) 1983-12-12 1984-11-20 ROLLER SCREEN OF VERTICAL PRESSURE TYPE, WITH BATCH FEED IN DIFFERENT AXIALLY DISTANCED POSITIONS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US56024883A 1983-12-12 1983-12-12
US560248 1995-11-21

Publications (3)

Publication Number Publication Date
EP0145365A2 EP0145365A2 (en) 1985-06-19
EP0145365A3 true EP0145365A3 (en) 1987-04-01
EP0145365B1 EP0145365B1 (en) 1990-11-14

Family

ID=24236977

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84308039A Expired - Lifetime EP0145365B1 (en) 1983-12-12 1984-11-20 Rotary pulp screen of the vertical pressure type having pulp stock feed at different axial positions on the screen

Country Status (4)

Country Link
EP (1) EP0145365B1 (en)
AT (1) ATE58403T1 (en)
CA (1) CA1238604A (en)
DE (1) DE3483601D1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI83892C (en) * 1989-06-05 1991-09-10 Tampella Oy Ab TRYCKSIL.
US5075001A (en) * 1989-07-13 1991-12-24 Taylor James W Method and apparatus for recovering fibrous material from a paper/pulp process water stream
SE511786C2 (en) 1998-03-06 1999-11-22 Sunds Defibrator Ind Ab Screening device with two screening chambers for separating fiber suspensions
JP3435346B2 (en) * 1998-04-16 2003-08-11 相川鉄工株式会社 Screen device
AT408772B (en) * 2000-02-03 2002-03-25 Andritz Ag Maschf SORTER FOR CLEANING A FIBER SUSPENSION
AT413390B (en) * 2003-03-27 2006-02-15 Andritz Ag Maschf SORTER FOR CLEANING A FIBER SUSPENSION
AT413391B (en) * 2003-03-27 2006-02-15 Andritz Ag Maschf SORTER FOR CLEANING A FIBER SUSPENSION

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1639273A (en) * 1925-04-01 1927-08-16 Improved Paper Machinery Compa Screen
US3400820A (en) * 1965-03-30 1968-09-10 Bird Machine Co Screening apparatus with rotary pulsing member
FR2384889A1 (en) * 1977-03-23 1978-10-20 Finckh Maschf SCRUBBER-SORTER FOR THE SEPARATION OF FIBER SUSPENSIONS
GB2048704A (en) * 1979-05-03 1980-12-17 Hopper A Rotary pulp screening device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1639273A (en) * 1925-04-01 1927-08-16 Improved Paper Machinery Compa Screen
US3400820A (en) * 1965-03-30 1968-09-10 Bird Machine Co Screening apparatus with rotary pulsing member
FR2384889A1 (en) * 1977-03-23 1978-10-20 Finckh Maschf SCRUBBER-SORTER FOR THE SEPARATION OF FIBER SUSPENSIONS
GB2048704A (en) * 1979-05-03 1980-12-17 Hopper A Rotary pulp screening device

Also Published As

Publication number Publication date
CA1238604A (en) 1988-06-28
DE3483601D1 (en) 1990-12-20
ATE58403T1 (en) 1990-11-15
EP0145365B1 (en) 1990-11-14
EP0145365A2 (en) 1985-06-19

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