GB1070451A - Screening apparatus - Google Patents

Screening apparatus

Info

Publication number
GB1070451A
GB1070451A GB7147/65A GB714765A GB1070451A GB 1070451 A GB1070451 A GB 1070451A GB 7147/65 A GB7147/65 A GB 7147/65A GB 714765 A GB714765 A GB 714765A GB 1070451 A GB1070451 A GB 1070451A
Authority
GB
United Kingdom
Prior art keywords
drum
screen
indentations
conduit
portions
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.)
Expired
Application number
GB7147/65A
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.)
Canadian Ingersoll Rand Co Ltd
Bird Machine Co Inc
Original Assignee
Canadian Ingersoll Rand Co Ltd
Bird Machine Co 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 Canadian Ingersoll Rand Co Ltd, Bird Machine Co Inc filed Critical Canadian Ingersoll Rand Co Ltd
Publication of GB1070451A publication Critical patent/GB1070451A/en
Expired 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
    • D21D1/00—Methods of beating or refining; Beaters of the Hollander type
    • D21D1/20—Methods of refining
    • D21D1/22—Jordans
    • 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
    • B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
    • 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
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/117—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements arranged for outward flow filtration
    • B01D29/118—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements arranged for outward flow filtration open-ended
    • 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
    • B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
    • B01D29/52—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in parallel connection
    • B01D29/54—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in parallel connection arranged 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
    • B01D29/76—Handling the filter cake in the filter for purposes other than for regenerating
    • B01D29/86—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
    • 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
    • B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
    • B01D29/90—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for feeding
    • B01D29/908—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for feeding provoking a tangential stream
    • 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
    • B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
    • B01D29/94—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for discharging the filter cake, e.g. chutes
    • B01D29/945—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor 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
    • B01D36/00—Filter circuits or combinations of filters with other separating devices
    • B01D36/04—Combinations of filters with settling tanks
    • B01D36/045—Combination of filters with centrifugal separation devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • 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
    • 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
    • D21D5/06—Rotary screen-drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B2230/00—Specific aspects relating to the whole B07B subclass
    • B07B2230/01—Wet separation

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Combined Means For Separation Of Solids (AREA)
  • Cleaning Implements For Floors, Carpets, Furniture, Walls, And The Like (AREA)
  • Brushes (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)

Abstract

1,070,451. Hollow stationary filters for liquids. CANADIAN INGERSOLL-RAND CO. Ltd., and BIRD MACHINE CO. Feb. 18, 1965 [April 29, 1964], No. 7147/65. Heading B1D. A mixture of fibrous material and liquid is introduced at 8, preferably tangentially, to an inlet gutter 6, whence it flows radially inwards over a baffle 10 to an annular zone between a fixed cylindrical perforate screening member 12 and an imperforate drum 24, rotating at preferably more than 3,000 feet per minute. Accepted material passing through screen 12 flows out, preferably tangentially at 16, the horizontal flow direction being the same as that of the incoming material. Rejected material from between the drum and screen flows out at 20, assisted if necessary by liquid introduced at 46 to the interior of drum 24 and flowing downwardly therefrom through an annular gap 48. The invention is characterised by the provision of bumps on (as shown), or indentations in, the surface of the drum 24; alternatively the invention may be embodied in apparatus where both the screen and the revolving member are disc-shaped and lie in parallel planes (see below). The projected area of each "offset portion", (the bumps or indentations), on a plane parallel to the base surface has a length to width ratio less than about five to one, and further, this area is at least substantially equal to the projected area of the impelling surface of the offset portion on a plane perpendicular to its direction of movement. As shown the drum 24 tapers upwardly, but it may be parallel-sided, Figs. 7 and 8 (not shown), in which case the screen 12 may taper downwardly, Fig. 7 (not shown). The bumps may be hemispheres; the indentations may be perforations in a cylindrical shell mounted on and in contact with the smooth surface of an inner drum-like support. The offset portions may be evenly-spaced in parallel vertical rows; the paths of the resulting horizontal rows overlap slightly at both edges. Where the portions take the form of indentations, the drum exterior may be provided with ribs (e.g. six in number) inclined at an angle to the vertical, Figs. 18, 19 (not shown). The offset portions may be formed by raised rectangles with rounded ends, and tops; alternatively they may be cones or cylinders; dents of these forms can also be used. In a further alternative, Fig. 14 (not shown), the offset portions are in the form of triangular tongues (56s) struck upwardly from a base cylinder, the raised parts trailing in the direction of movement; preferably the base cylinder is secured to an impervious support. Fig. 21 (not shown), is a modification of Fig. 1. The incoming mixture enters the top of the casing and impinges on the top of drum 24, which is provided with vanes for flinging it outward directly to the zone between drum and screen. The lower end of the drum forms a labyrinth seal with the bottom of the casing; water supplied thereto both lubricates the seal and dilutes the rejected material; vanes are provided on the drum at this location to propel the rejected material to its conduit. In Fig. 20 (not shown), the drum has a short central cylindrical portion, the remainder being two frusto-conical portions with their wider ends at the extremities. The surrounding perforate screen has a central inlet gutter with which the inlet communicates. An "accepts" conduit is provided opposite each screen portion and a "rejects" conduit at each end of the casing. In Fig. 22 (not shown) a rotary member in the form of an inverted cup depends into the space between concentric perforate screens from the bottom of which a "rejects" conduit extends. Feed and "accepts" arrangements are somewhat as in Fig. 1. In Fig. 24 (not shown), mixture is fed upwards through the centre of a flat annular screen above which rotates a disc with appropriate offset portions. "Rejects" are flung sideways and "accepts" descend through the screen. In Fig. 23 (not shown) a disc rotates between two horizontal annular screens. In all cases the rotary member provides pulsations; paper pulp may be treated.
GB7147/65A 1964-04-29 1965-02-18 Screening apparatus Expired GB1070451A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US363438A US3363759A (en) 1964-04-29 1964-04-29 Screening apparatus with rotary pulsing member

Publications (1)

Publication Number Publication Date
GB1070451A true GB1070451A (en) 1967-06-01

Family

ID=23430210

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7147/65A Expired GB1070451A (en) 1964-04-29 1965-02-18 Screening apparatus

Country Status (11)

Country Link
US (1) US3363759A (en)
AT (1) AT279332B (en)
BE (1) BE661970A (en)
CH (1) CH451686A (en)
DE (1) DE1483497B2 (en)
ES (1) ES310571A1 (en)
FI (1) FI47397C (en)
GB (1) GB1070451A (en)
NL (1) NL6503595A (en)
NO (1) NO130486C (en)
SE (1) SE331630B (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2314292A1 (en) * 1975-06-14 1977-01-07 Finckh Metalltuch Maschf PRESSURE SEPARATOR FOR FIBER SUSPENSIONS
EP0036329A2 (en) * 1980-03-17 1981-09-23 The Black Clawson Company Center flow screening apparatus
EP0036328A2 (en) * 1980-03-17 1981-09-23 The Black Clawson Company Dual flow screening apparatus
GB2186206A (en) * 1986-02-11 1987-08-12 Beaudrey & Cie Cross-flow filter
EP0294832A2 (en) * 1987-06-11 1988-12-14 A. Ahlstrom Corporation Pulp screening apparatus
EP0275967A3 (en) * 1987-01-19 1989-02-08 A. Ahlstrom Corporation Method and apparatus for separating knots
FR2666598A1 (en) * 1990-09-10 1992-03-13 Escher Wyss Gmbh Process for the separation, especially for sorting or fractionating a suspension of paper pulp
EP0486209A1 (en) * 1990-11-13 1992-05-20 The Black Clawson Company Screening apparatus for paper making stock
EP0541979A1 (en) * 1991-10-31 1993-05-19 J.M. Voith GmbH Screening apparatus
CN107684759A (en) * 2017-09-28 2018-02-13 宜兴市永洁环保设备有限公司 Flow slowly anti-blocking filter screen and net-filter assembly

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Publication number Priority date Publication date Assignee Title
US3458038A (en) * 1966-06-02 1969-07-29 Ingersoll Rand Canada Screening apparatus
US3731814A (en) * 1967-11-27 1973-05-08 Brown C Liquid filter
US3581893A (en) * 1968-01-02 1971-06-01 Improved Machinery Inc Screening apparatus
US3561603A (en) * 1968-10-08 1971-02-09 Beloit Corp Pulp screen or the like
SE358429B (en) * 1969-06-10 1973-07-30 Sunds Ab
US3647067A (en) * 1970-02-24 1972-03-07 Improved Machinery Inc Screening apparatus having rejects controlling means
US3933649A (en) * 1971-03-01 1976-01-20 Ahlfors S E E Apparatus for purifying and fractionating particle suspensions
SE374148B (en) * 1972-08-31 1975-02-24 S E E Ahlfors
US3874509A (en) * 1972-11-06 1975-04-01 Beloit Corp Pressure screen and surge tank
US3791917A (en) * 1973-03-07 1974-02-12 Bird Machine Co Process for producing kraft paper laminate of top stock and base stock layers
US4127479A (en) * 1973-11-08 1978-11-28 J. M. Voith G.M.B.H. Apparatus for straining suspensions
AT336392B (en) * 1974-03-20 1977-05-10 Finckh Metalltuch Maschf PRESSURE SECTION FOR FIBER SUSPENSIONS
US3912622A (en) * 1974-05-30 1975-10-14 Bird Machine Co Screening machine with lights removal
US4105543A (en) * 1974-08-09 1978-08-08 The Black Clawson Company Method for screening paper fiber stock
US4098182A (en) * 1976-05-17 1978-07-04 The Pillsbury Company Press for removing liquids from amorphous material
US4166028A (en) * 1976-05-20 1979-08-28 The Black Clawson Company Apparatus for screening paper fiber stock
US4067800A (en) * 1976-12-06 1978-01-10 Ingersoll-Rand Company Screening apparatus
FR2410081A1 (en) * 1977-11-23 1979-06-22 Lamort Ingenieurs Construc E E APPARATUS FOR PULPING PAPER PULP
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SE415895B (en) * 1979-02-20 1980-11-10 Sunds Defibrator PRESSURE SILK DEVICE FOR FRACTIONING OF MATERIAL SUSPENSIONS
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DE3006482C2 (en) * 1980-02-21 1983-04-14 J.M. Voith Gmbh, 7920 Heidenheim Rotary sorter
US4328096A (en) * 1980-03-17 1982-05-04 The Black Clawson Company Dual flow screening apparatus
FR2487216A1 (en) * 1980-07-25 1982-01-29 Centre Tech Ind Papier METHOD AND DEVICE FOR FRACTIONING SUSPENSIONS OF SOLID PARTICLES IN A LIQUID, IN PARTICULAR FOR TREATING FIBROUS SUSPENSIONS IN THE PAPER INDUSTRY
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US4374728A (en) * 1981-07-29 1983-02-22 Gauld W Thomas Apparatus for screening fibrous stock
EP0101458A1 (en) * 1982-02-12 1984-02-29 Ris Irrigation Systems Pty.Ltd. Self cleaning filter
US4396502A (en) * 1982-03-18 1983-08-02 Beloit Corporation Screening apparatus for a papermaking machine
DE3240487C2 (en) * 1982-11-02 1986-03-06 Naučno-issledovatel'skij i proektno-konstruktorskij institut celljuloznogo mašinostroenija "NIICMAŠ", Petrozavodsk Pressure sifter for fiber suspensions
US4543181A (en) * 1982-12-16 1985-09-24 Kamyr, Inc. Medium consistency flat disk pressure screen
FI67588C (en) * 1983-01-26 1985-04-10 Ahlstroem Oy SILPLAOT
FI67589C (en) * 1983-10-25 1985-04-10 Ahlstroem Oy SORTERARE WITH SEPARATION AV LAETT REJEKT
DE3572928D1 (en) * 1984-12-25 1989-10-19 Mitsubishi Heavy Ind Ltd Pressure slit screen
US4855038A (en) * 1985-06-20 1989-08-08 Beloit Corporation High consistency pressure screen and method of separating accepts and rejects
US5110456A (en) * 1985-06-20 1992-05-05 Beloit Corporation High consistency pressure screen and method of separating accepts and rejects
US4981583A (en) * 1985-06-20 1991-01-01 Beloit Corporation High consistency pressure screen and method of separating accepts and rejects
GB2195911A (en) * 1986-10-08 1988-04-20 Ingersoll Rand Co Screening apparatus for pulp
FI77279C (en) * 1987-04-30 1989-02-10 Ahlstroem Oy FOERFARANDE OCH ANORDNING FOER BEHANDLING AV FIBERSUSPENSION.
US5156750A (en) * 1987-07-08 1992-10-20 A. Ahlstrom Corporation Method and apparatus for thickening a fiber suspension and removing fine particles therefrom
JPH089838B2 (en) * 1987-07-08 1996-01-31 エイ．アフルストロム コ−ポレ−ション Method and device for thickening fiber suspensions
IT1218513B (en) * 1987-09-23 1990-04-19 T Automatismi Termoplastici Sr REDUCED OVERALL DIMENSION CHAMBER FOR EXTRUDERS OF PLASTIC TYPE MATERIAL
SE461104B (en) * 1988-05-05 1990-01-08 Kamyr Ab DEVICE FOR DIVISION OF A SUSPENSION OF A FIBER-CELLULOUS CELLULOSAMASSA
US5172813A (en) * 1989-05-17 1992-12-22 A. Ahlstrom Corporation Method and an apparatus for treating fiber suspension
US5255540A (en) * 1990-06-29 1993-10-26 Beloit Technologies, Inc. Pressurized dynamic washer
FI88414C (en) * 1991-01-30 1993-05-10 Ahlstroem Oy Device for treating fiber suspension
FI92227C (en) * 1992-04-23 1994-10-10 Ahlstroem Oy Apparatus for processing the fiber suspension
US5413460A (en) * 1993-06-17 1995-05-09 Goulds Pumps, Incorporated Centrifugal pump for pumping fiber suspensions
US5341936A (en) * 1993-07-12 1994-08-30 Ingersoll-Rand Company Screening device for a fiber slurry, and a backwash means therefor
US5538632A (en) * 1993-10-28 1996-07-23 Beloit Technologies, Inc. Multiple filter dynamic washer
US5624558A (en) * 1994-08-04 1997-04-29 Cae Screenplates Inc. Method and apparatus for screening a fiber suspension
CA2158522C (en) * 1994-09-19 2001-04-10 Daniel R. Roll Mixer for mixing multi-phase fluids
FI97631C (en) * 1994-11-21 1997-01-27 Pom Technology Oy Ab Apparatus and method for sorting a fiber suspension
US5607589A (en) * 1995-06-06 1997-03-04 Cae Screenplates Inc. Multiple contour screening
IL119182A (en) * 1996-09-02 2000-06-29 Goodman Geoffrey Filter
US6155427A (en) * 1996-11-14 2000-12-05 Thermo Black Clawson Inc. Zoned pressure screen
SE511483C2 (en) * 1998-02-04 1999-10-04 Sunds Defibrator Ind Ab Pressure screen with scrap separation
DE19836318A1 (en) * 1998-08-11 1999-07-15 Voith Sulzer Papiertech Patent Rotor for fiber suspension pressure sorter for papermaking
DE19911884A1 (en) * 1999-03-17 2000-09-21 Voith Sulzer Papiertech Patent Pressure sorter for screening a paper pulp suspension and screen clearer for one
US20050045529A1 (en) * 2003-09-02 2005-03-03 Gl&V Management Hungary Kft Vortex inducing rotor for screening apparatus for papermaking pulp
FI117867B (en) * 2004-12-10 2007-03-30 Metso Paper Inc Sorter and method for sorting the pulp
CN102363144A (en) * 2011-11-07 2012-02-29 成都鑫三洋科技发展有限公司 Simple vibrating screen
CN106731203B (en) * 2016-12-27 2018-09-07 李允杰 A kind of configurating filtered device of solid-liquid reagent
CN109675785B (en) * 2019-02-27 2023-10-24 新乡市高服机械股份有限公司 Positive pressure on-line screening airflow screen
CN110904712B (en) * 2019-12-11 2021-02-12 安徽泾县艺宝牌宣纸工艺品有限公司 Waste paper raw materials beating machine
CN114505226B (en) * 2022-02-21 2023-04-07 南昌工程学院 Construction waste cleaning device for engineering construction

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2314292A1 (en) * 1975-06-14 1977-01-07 Finckh Metalltuch Maschf PRESSURE SEPARATOR FOR FIBER SUSPENSIONS
EP0036329A2 (en) * 1980-03-17 1981-09-23 The Black Clawson Company Center flow screening apparatus
EP0036328A2 (en) * 1980-03-17 1981-09-23 The Black Clawson Company Dual flow screening apparatus
EP0036328A3 (en) * 1980-03-17 1982-01-13 The Black Clawson Company Dual flow screening apparatus
EP0036329A3 (en) * 1980-03-17 1982-01-20 The Black Clawson Company Center flow screening apparatus
GB2186206B (en) * 1986-02-11 1989-10-25 Beaudrey & Cie Self-cleaning filter and steam condenser inlet water box comprising same
GB2186206A (en) * 1986-02-11 1987-08-12 Beaudrey & Cie Cross-flow filter
EP0275967A3 (en) * 1987-01-19 1989-02-08 A. Ahlstrom Corporation Method and apparatus for separating knots
EP0294832A2 (en) * 1987-06-11 1988-12-14 A. Ahlstrom Corporation Pulp screening apparatus
EP0294832A3 (en) * 1987-06-11 1989-03-08 A. Ahlstrom Corporation Pulp screening apparatus
FR2666598A1 (en) * 1990-09-10 1992-03-13 Escher Wyss Gmbh Process for the separation, especially for sorting or fractionating a suspension of paper pulp
EP0486209A1 (en) * 1990-11-13 1992-05-20 The Black Clawson Company Screening apparatus for paper making stock
EP0541979A1 (en) * 1991-10-31 1993-05-19 J.M. Voith GmbH Screening apparatus
CN107684759A (en) * 2017-09-28 2018-02-13 宜兴市永洁环保设备有限公司 Flow slowly anti-blocking filter screen and net-filter assembly

Also Published As

Publication number Publication date
FI47397B (en) 1973-07-31
AT279332B (en) 1970-03-10
FI47397C (en) 1973-11-12
SE331630B (en) 1971-01-04
NO130486C (en) 1974-12-18
ES310571A1 (en) 1965-07-16
NO130486B (en) 1974-09-09
CH451686A (en) 1968-05-15
NL6503595A (en) 1965-11-01
DE1483497A1 (en) 1969-10-16
DE1483497B2 (en) 1977-01-13
BE661970A (en) 1965-10-04
US3363759A (en) 1968-01-16

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