US3859206A - Stock cleaner and method - Google Patents

Stock cleaner and method Download PDF

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Publication number
US3859206A
US3859206A US323250A US32325073A US3859206A US 3859206 A US3859206 A US 3859206A US 323250 A US323250 A US 323250A US 32325073 A US32325073 A US 32325073A US 3859206 A US3859206 A US 3859206A
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United States
Prior art keywords
stock
chamber
duct
axis
wall
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Expired - Lifetime
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US323250A
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English (en)
Inventor
Jack Baggaley
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Beloit Corp
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Beloit Corp
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    • 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
    • D21D5/18—Purification of the pulp suspension by mechanical means; Apparatus therefor with the aid of centrifugal force

Definitions

  • ABSTRACT Centrifugal separation of heavy and light impurities from waste paper stock in a centrifuge chamber is effected by removing the heavy impurities at the outer perimeter of rotation of the mass and extracting light impurities through an outlet drawing from the center of the mass in the opposite direction from recovery of stock from the mass.
  • a cylindrical chamber receives the raw material tangentially adjacent to one end of the chamber and has a 10 Claims, 3 Drawing Figures PAIENTEDJAN 7197s @w Y K WNW STOCK CLEANER AND METHOD
  • This invention relates to separator units and more particularly to a separator unit for removing impurities from stock, particularly waste stock, intended for use in paper or board making machines.
  • waste paper such as waste paper
  • waste paper particularly for use in forming the intermediate plies in multi-ply paper or board.
  • a difficulty with stock made from waste materials is that of cleaning the stock of heavy and light impurities which must be removed before the stock can be used.
  • the waste material and water are fed to a chamber and rotated about a substantially horizontal axis by a rotor mounted adjacent one wall of the chamber.
  • the waste is broken down or pulped by the rotational.
  • movement of the stock and the rotor and stock is discharged from the stock chamber through openings, generally defined by an annular screen plate, in the wall adjacent the rotor.
  • the heavy impurities that is to say impurities having a specific gravity greater than 1 are caused to flow outwardly from the axis of rotation by the rotating stock and said impurities are collected in a channel or recess in a chamber wall remote from the rotational axis of the stock.
  • the light impurities that is to say impurities having a specific gravity less'than l, are caused to move inwardly towards the axis of rotation by the rotating stock and, at said axis, said impurities are plaited into a rope by the stock, and the rope is continuously extracted from the chamber through an opening, lying substantially concentric with the axis of rotation, in a wall opposite said rotor.
  • the rope of light impurities is started off by inserting a rope, with a wire bait on the end thereof, through the opening into the stock, collecting impurities on the wire bait, and then slowly withdrawing the rope as the plaited rope of impurities becomes self-supporting.
  • a principal object of the present invention is to provide a new and improved separator unit for cleaning stock.
  • a separator unit comprises a stock centrifuge chamber, a stock inlet duct for supplying stock into said chamber, cleaned stock outlet passageways in an end wall of the chamber and a waste outlet comprising a duct, projecting into the chamber on the axis of rotation of stock centrifuging in said chamber, for tapping off light weight impurities adjacent the rotational axis of the stock.
  • stock in the centrifuge chamber is at a pressure in excess of atmospheric pressure and in one embodiment of the invention the stock is caused to centrifuge by establishing a pressure difference between tangentially inflowing stock and the axially exhausting cleaned stock.
  • the stock within the chamber is caused to centrifuge by an impeller or pulper mounted for rotation adjacent the clean stock outlets and rotated by a drive motor located externally of the chamber.
  • a waste outlet at a maximum diameter region for stock in the centrifuge chamber, for extracting heavy impurities centrifuged outwardly by rotating stock in the chamber.
  • the waste outlet for light impurities comprises an open ended tubular duct lying with its axis on the axis of rotation for the centrifuging stock and arranged to be axially adjustable with' respect to said chamber.
  • the light impurities outlet comprises a cylindrical duct, open at both ends, disposed in a sliding bearing in an end wall of the chamber.
  • a collar, or sleeve, rigidly secured to the tubular duct presents two diametrically opposed arms which are connected to the pistons of two hydraulic piston and cylinder arrange ments disposed one on either side of the tubular duct and in parallel relationship therewith.
  • the tubular duct has a smooth wall bore of substantially uniform cross section which affords unobstructed flow of impurities therealong.
  • the inflowing stock and the outflowing stock pressures are adjusted to establish within the stock rotating in the chamber an air core having a diameter slightly less than the internal diameter of the waste outlet duct.
  • the air is introduced into the air core from a duct passing axially through the rotor.
  • FIG. 1 is a horizontal vertical sectional view taken substantially along the line II of FIG. 2 through a separator unit in accordance with the invention
  • FIG. 2 is a vertical sectional view through the separator taken substantially along the line II-II of FIG. 1;
  • FIG. 3 is a diagrammatic vertical sectional view through the rotational axis of a separator unit similar to the embodiment shown in FIGS. 1 and 2 but having an arrangement for introducing air into an air core in the centrifuging stock.
  • chamber 11 is defined by a casing comprising a tubular wall I2 closed at one end recessed region in the wall 12 adjacent to the end plate 14 for collecting heavy impurities centrifuged out of the stock in the chamber 11.
  • the end wall 13 has a central opening 13a therein and an outwardly extending cylindrical member 18, flanged internally at its inner end at 18a and externally at its outer end at 18b is secured in the opening 13a and defines a sliding bearing for a tubular duct 19 axially located with respect to the chamber 11.
  • Three packing rings 20, 21, and 22 are located within the bore of the cylindrical member 18 and are axially compressed against the flange 18a by the inner end of a cylindrical member 23 which has on its outer end an external flange 230 connected to the external flange 18b by bolts 23b.
  • the packing rings 20, 21 and 22 form an effective fluid-tight seal between the cylindrical member 18 and the duct 19.
  • the duct 19 has a yoke 24 secured thereon and providing diametrically opposite arms 24a and 24b to which two piston and cylinder actuator or motor means, generally indicated by numerals 25 and 26, are connected to provide axial drive for the duct 19.
  • the end plate 14 has a central opening. 14a through which the boss 27a of an impeller 27 projects.
  • the impeller has blades 27b protruding axially from the boss 27a and radial blades 27c which serve to impart rotary motion to stock within the chamber 11 and further assist pulping of stock in the chamber.
  • the boss 27a is mounted on a driving shaft 28 which passes outwardly of the chamber 1 1 through a chamber 29, defined by a casing end closure 30 attached to the casing of chamber 11, and through a bearing 31 in the closure 30 to a drive means, generally indicated by numeral 32.
  • a stock outlet duct 33 leading from the preferably lower portion of the closure 30 is provided for draining stock from the chamber 29..
  • the separator unit described above operates as follows:
  • the heavy impurities are, as stated above, centrifuged towards the cylindrical wall 12 of the chamber ll and as heavy contaminated stock is continuously tapped off by way of the tangential trap 17 a continuous flow of heavy contaminated stock is established within the chamber 11.
  • the light impurities are centrifuged towards the axis of rotation of the stock and can be tapped off by reciprocating the tubular duct 19 along the axis of rotation of the stock, by supplying pressure fluid to alternate ends of the cylinders of the piston and cylinder actuators 25 and 26 in known manner.
  • the tubular duct 19 can have a relatively static position, said tubular duct 19 being adjusted by the piston and cylinder arrangements 25 and 26 to locate the open end of duct 19in the best axial position for extracting, continuously, light contaminated stock from the rotating body of stock. It will be appreciated that the best fixed position for the open end of duct 19 will depend upon the rate of stock flow, the speed of rotation, and quality of the stock for a given unit. Variation of one or more of these characteristics may require adjustment of the location of the end of the duct 19, which adjustment can be readily carried out using the piston and cylinder actuators 25 and 26.
  • the duct 19 is open at both ends and it has an unobstructed bore so that the core of the stock within the chamber 11 is exposed to atmosphere.
  • the stock inlet and outlet pressures and the speed of rotation of the stock are all controlled to establish within the rotating stock an air core extending from the rotor 27 to the waste outlet in the duct 19 with the diameter of the air core adjacent the waste outlet slightly less than the diameter of the bore of the duct 19.
  • FIG. 3 shows a modification to a separator unit of the type shown in FIG. 1 which greatly assists in the removal of light impurities from the region of the air core.
  • an air passageway 34 passes axially through the rotor 270, the shaft 28, a coupling 35, and a drive motor shaft 36.
  • An air coupling 37 is attached to the end of motor shaft 36 remote from the rotor 27a, through air tight bearing means, whereby the passageway 34 communicates with a conduit 38 connected to a pressure air source 39.
  • Provision of the air core serves two purposes, in that the evacuation of light impurities at the liquid/air surface is facilitated, and recirculation and distribution of light impurities from the core region of the stock back into the stock body, due to the rotor action, is severely reduced.
  • the chamber 11 may be instead of cylindrical, in the form of a frusto-conical shape and in such a construction the end wall 14 may define the large end of the casing 12 and the heavy contaminants trap may conveniently be located atthe largest diameter of the chamber 11.
  • a stock separator unit comprising a tubular wall providing a stock centrifuge chamber having opposite spaced end walls:
  • a rotary impeller concentric with said annular area and operating to impart rotary motion to stock within the chamber and assisting pulping of the stock;
  • a duct extending through said one wall concentric with the axis of rotation of the stock in the chamber for tapping off light impurities centrifuged toward the axis of rotation;
  • a unit according to claim 1 including actuating means for adjusting said axial duct for optimum location of its inner end within said chamber.
  • said actuating means comprise a pair of double acting piston and cylinder actuators arranged one on either side of and attached to said axial duct exteriorly of said chamber and parallel to the axis of the axial duct for effecting the axial adjustments of the axial duct.
  • a unit according to claim 1, wherein said impeller has a boss extending through a complementary opening in said opposite wall concentric with said perforate annular area, blades protruding axially from the boss and functioning to cause an air core in the stock in said chamber and leading to said axial duct, and radial blades on the boss which serve to impart the rotary motion within the chamber and to further assist pulping of stock within the chamber.
  • a unit according to claim 4 including means for introducing air under pressure on the rotational axis of the impeller to improve the air core.
  • a method of separating stock in a separator unit comprising a tubular wall providing a stock centrifuge chamber having opposite spaced end walls:
  • a method according to claim 7, comprising operating a pair of double acting piston and cylinder actuators arranged one on either side of and attached to the axial duct exteriorly of the chamber and parallel to the axis of the axle duct and thereby effecting axial adjustments of the axial duct.
  • a method according to claim 6, including operating blades protruding axially from the impeller and thereby causing an air core in the stock leading to said axial duct, and operating radial blades on the impeller to impart rotary motion to the stock in the chamber and to further assist in pulping the stock within the chamber.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Centrifugal Separators (AREA)
  • Paper (AREA)
  • Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
  • Separating Particles In Gases By Inertia (AREA)
  • Cyclones (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Cell Separators (AREA)
US323250A 1972-01-28 1973-01-12 Stock cleaner and method Expired - Lifetime US3859206A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB408272*[A GB1411093A (en) 1972-01-28 1972-01-28 Separator units

Publications (1)

Publication Number Publication Date
US3859206A true US3859206A (en) 1975-01-07

Family

ID=9770393

Family Applications (1)

Application Number Title Priority Date Filing Date
US323250A Expired - Lifetime US3859206A (en) 1972-01-28 1973-01-12 Stock cleaner and method

Country Status (17)

Country Link
US (1) US3859206A (no)
JP (1) JPS5528738B2 (no)
AR (1) AR202176A1 (no)
BE (1) BE794399A (no)
BR (1) BR7300628D0 (no)
CA (1) CA975327A (no)
CH (1) CH552717A (no)
DE (2) DE7302003U (no)
ES (1) ES410873A1 (no)
FI (1) FI57358C (no)
FR (1) FR2169355B1 (no)
GB (1) GB1411093A (no)
IT (1) IT976765B (no)
NL (1) NL7300758A (no)
NO (1) NO143054C (no)
SE (1) SE387978B (no)
ZA (1) ZA728998B (no)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3942728A (en) * 1973-08-27 1976-03-09 Escher Wyss Gmbh Stock pulper
US3964996A (en) * 1974-03-20 1976-06-22 Hermann Finckh Metalltuch- Und Maschinenfabrik Classifying unit for fibrous suspensions
US4017033A (en) * 1975-03-29 1977-04-12 J. M. Voith Gmbh Apparatus and method for reclaiming waste papers
US4136018A (en) * 1977-11-10 1979-01-23 Beloit Corporation Vortex separator with coaxial inlet and lightweight reject pipelines
US4167249A (en) * 1976-11-16 1979-09-11 Sulzer Brothers Limited Stock pulper for pulping and sorting waste paper
US4178234A (en) * 1978-07-20 1979-12-11 Bobo Roy A Rotating cyclone centrifuge apparatus
US4216918A (en) * 1976-12-08 1980-08-12 Escher Wyss Gmbh Fiberizer
US4222817A (en) * 1978-06-26 1980-09-16 Beloit Corporation Method and apparatus for pulping and grading waste material
US4443331A (en) * 1980-03-21 1984-04-17 Centre Technique De L'industries Des Papiers Carton Et Celluloses Process and device for separating particles in a fluid especially for the cleaning of the suspensions handled in the paper industry
US4443296A (en) * 1978-11-17 1984-04-17 E Et M Lamort (Societe Anonyme) Processes and devices for the disintegration of cellulose materials
US4641790A (en) * 1983-12-16 1987-02-10 J. M. Voith Gmbh System for wastepaper processing using a wash filter
US4646979A (en) * 1983-12-16 1987-03-03 J. M. Voith Gmbh Apparatus for cleaning fibrous suspensions
US6530481B1 (en) * 1998-02-04 2003-03-11 Valmet Fibertech Aktiebolag Pressure screen with scrap separation

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS543963A (en) * 1977-06-10 1979-01-12 Agency Of Ind Science & Technol Cyclone selector
DE2818029C2 (de) * 1978-04-25 1984-01-12 J.M. Voith Gmbh, 7920 Heidenheim Vorrichtung zum Sortieren von Faserstoffsuspensionen
DE19825669B4 (de) * 1998-06-09 2005-09-08 Voith Paper Patent Gmbh Siebapparat für eine verschmutzte Faserstoffsuspension
CN110396845B (zh) * 2019-07-16 2021-08-03 山鹰国际控股股份公司 一种用于制浆造纸的尾浆回收处理系统

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2717695A (en) * 1949-11-29 1955-09-13 Carl C Martin Cyclonic separator for wet operation
US2743815A (en) * 1952-09-10 1956-05-01 Centrijig Corp Continuous centrifugal jig separator
US2925177A (en) * 1957-03-25 1960-02-16 Bird Machine Co Centrifugal separator
US3172844A (en) * 1960-10-21 1965-03-09 Escher Wyss Gmbh Cleaning apparatus
US3310242A (en) * 1964-02-24 1967-03-21 Improved Machinery Inc Fiber disintegrating and classifying apparatus
US3405803A (en) * 1963-08-26 1968-10-15 Voith Gmbh J M Vortex separator
US3421622A (en) * 1965-08-19 1969-01-14 Nichols Eng & Res Corp Cleaning and deaerating paper pulp suspensions
US3425545A (en) * 1963-08-02 1969-02-04 Rudolf Zemanek Method and apparatus for separating fibrous suspensions
US3454163A (en) * 1967-04-14 1969-07-08 Ivan Jay Read Method of separating solids from liquids
US3565350A (en) * 1968-05-20 1971-02-23 Wascon Systems Inc Comminuting apparatus
US3690571A (en) * 1971-05-12 1972-09-12 Improved Machinery Inc Apparatus for disintegrating and separating material in fluid suspension
US3774853A (en) * 1972-01-26 1973-11-27 Black Clawson Fibreclaim Inc Pulping apparatus for waste material

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2717695A (en) * 1949-11-29 1955-09-13 Carl C Martin Cyclonic separator for wet operation
US2743815A (en) * 1952-09-10 1956-05-01 Centrijig Corp Continuous centrifugal jig separator
US2925177A (en) * 1957-03-25 1960-02-16 Bird Machine Co Centrifugal separator
US3172844A (en) * 1960-10-21 1965-03-09 Escher Wyss Gmbh Cleaning apparatus
US3425545A (en) * 1963-08-02 1969-02-04 Rudolf Zemanek Method and apparatus for separating fibrous suspensions
US3405803A (en) * 1963-08-26 1968-10-15 Voith Gmbh J M Vortex separator
US3310242A (en) * 1964-02-24 1967-03-21 Improved Machinery Inc Fiber disintegrating and classifying apparatus
US3421622A (en) * 1965-08-19 1969-01-14 Nichols Eng & Res Corp Cleaning and deaerating paper pulp suspensions
US3454163A (en) * 1967-04-14 1969-07-08 Ivan Jay Read Method of separating solids from liquids
US3565350A (en) * 1968-05-20 1971-02-23 Wascon Systems Inc Comminuting apparatus
US3690571A (en) * 1971-05-12 1972-09-12 Improved Machinery Inc Apparatus for disintegrating and separating material in fluid suspension
US3774853A (en) * 1972-01-26 1973-11-27 Black Clawson Fibreclaim Inc Pulping apparatus for waste material

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3942728A (en) * 1973-08-27 1976-03-09 Escher Wyss Gmbh Stock pulper
US3964996A (en) * 1974-03-20 1976-06-22 Hermann Finckh Metalltuch- Und Maschinenfabrik Classifying unit for fibrous suspensions
US4017033A (en) * 1975-03-29 1977-04-12 J. M. Voith Gmbh Apparatus and method for reclaiming waste papers
US4167249A (en) * 1976-11-16 1979-09-11 Sulzer Brothers Limited Stock pulper for pulping and sorting waste paper
US4216918A (en) * 1976-12-08 1980-08-12 Escher Wyss Gmbh Fiberizer
US4136018A (en) * 1977-11-10 1979-01-23 Beloit Corporation Vortex separator with coaxial inlet and lightweight reject pipelines
US4222817A (en) * 1978-06-26 1980-09-16 Beloit Corporation Method and apparatus for pulping and grading waste material
US4178234A (en) * 1978-07-20 1979-12-11 Bobo Roy A Rotating cyclone centrifuge apparatus
US4443296A (en) * 1978-11-17 1984-04-17 E Et M Lamort (Societe Anonyme) Processes and devices for the disintegration of cellulose materials
US4443331A (en) * 1980-03-21 1984-04-17 Centre Technique De L'industries Des Papiers Carton Et Celluloses Process and device for separating particles in a fluid especially for the cleaning of the suspensions handled in the paper industry
US4641790A (en) * 1983-12-16 1987-02-10 J. M. Voith Gmbh System for wastepaper processing using a wash filter
US4646979A (en) * 1983-12-16 1987-03-03 J. M. Voith Gmbh Apparatus for cleaning fibrous suspensions
US6530481B1 (en) * 1998-02-04 2003-03-11 Valmet Fibertech Aktiebolag Pressure screen with scrap separation

Also Published As

Publication number Publication date
FR2169355A1 (no) 1973-09-07
GB1411093A (en) 1975-10-22
FI57358C (fi) 1980-08-11
FI57358B (fi) 1980-04-30
CA975327A (en) 1975-09-30
IT976765B (it) 1974-09-10
DE7302003U (de) 1976-11-18
SE387978B (sv) 1976-09-20
NL7300758A (no) 1973-07-31
NO143054B (no) 1980-09-01
AU5248073A (en) 1974-08-22
ZA728998B (en) 1973-09-26
JPS5528738B2 (no) 1980-07-30
FR2169355B1 (no) 1977-02-04
DE2302601C3 (de) 1979-01-11
BR7300628D0 (pt) 1973-09-20
BE794399A (fr) 1973-07-23
CH552717A (de) 1974-08-15
DE2302601A1 (de) 1973-08-09
JPS4884352A (no) 1973-11-09
ES410873A1 (es) 1975-12-01
AR202176A1 (es) 1975-05-23
DE2302601B2 (de) 1978-04-20
NO143054C (no) 1980-12-10

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