[go: up one dir, main page]

US3330487A - Method and apparatus for loosening fibers of waste paper - Google Patents

Method and apparatus for loosening fibers of waste paper Download PDF

Info

Publication number
US3330487A
US3330487A US40087064A US3330487A US 3330487 A US3330487 A US 3330487A US 40087064 A US40087064 A US 40087064A US 3330487 A US3330487 A US 3330487A
Authority
US
United States
Prior art keywords
pulp
fibers
waste paper
loosening
nozzle
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 - Lifetime
Application number
Other languages
English (en)
Inventor
Pav Jarmil
Hnetkovsky Vaclav
Drda Karel
Libnar Zbynek
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US3330487A publication Critical patent/US3330487A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
    • D21B1/30—Defibrating by other means
    • D21B1/32—Defibrating by other means of waste paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
    • D21B1/30—Defibrating by other means
    • D21B1/303—Defibrating by other means using vibrating devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/64—Paper recycling

Definitions

  • the present invention relates to a method and apparatus for loosening fibers of Waste paper.
  • Waste paper is an important source of raw material for paper and cardboard manufacture.
  • the reuse of waste paper is dependent on its perfect pulping and complete separat-ion of the individual fi-bers which are glued together during the original manufacturing process and the perfect Washing of the fibers.
  • waste paper when used as a source of raw material for paper and cardboard manufacture, are first proces-sed either in slushing apparatus (hydrapulpers, beaters, or the like) or in substantially dry state, after previous steaming, in pulping devices consisting substantially of milling devices of the paper manufacture such as cone mills or the like.
  • the method of the present invention for loosening fibers of waste paper basically comprises the steps of mixing waste paper and water and subjecting the mixture to a coarse pulping operation, thickening the pulp thus obtained, feeding the thickened pulp into a storage tank and subjecting it therein to swelling and hydration, discharging the pulp from the tank while diluting it to a smaller density, and subjecting the diluted pulp to mechanical oscillations at high frequency SSS' Patented July 11, 1967 for loosening the fibers, and finally screening the thus finely pulped stock.
  • the pulp is maintained in the storage tank at a density of 10-22%, that is, 10-22% solids in 100% pulp, and diluted while being discharged therefrom to a density of 0.5 to 5%.
  • the thus diluted pulp is fed under considerable pressure in a concentrated stream, which stream is subjected to mechanical oscillations at a frequency of 1.5 to 45K c.p.s.
  • the apparatus of the present invention for loosening the fibers of waste paper after the same has been subjected to swelling and hydration and after the stock has been diluted to the above-mentioned density mainly comprises chamber means, nozzle means having an outlet end communicating with the interior of t-he chamber means for directing a pressurized stream of pulp into the chamber means, and vibrator means axially aligned with the nozzle means adjacent said outlet end and vibrating at high frequency for subjecting the stream to mechanical vibrations.
  • the vibrator means preferably includes a vibrator body axially aligned with the outlet end of the nozzle means and having a tapered substantially -conical end facing the outlet end of the nozzle means.
  • the conical end of the vibrator body has preferably a vertex angle of 60-120 and the point of the conical end is closely spaced from the outlet end of the nozzle means, preferably a distance of 5-25 mm.
  • the vibrator ymeans are constructed to oscillate at a frequency range of 1.5 to 45K c.p.s.
  • the fiber loosening apparatus of the present invention will produce proper separation of the fibers without requiring a screening system ahead of the liber loosening apparatus Ias is necessary with existing apparatus of the prior art. This will not only reduce the necessary investment cost of the installation, but this will also reduce losses of -good fibers occurring in a screening system through which stock is passed according to the prio-r art before it is finely pulped.
  • the waste paper is subjected first to an extended hydration, causing by means of a swelling effect loosening of hydrated cellulose fibers and loosening glue, coloring matter and inorganic components and fillers surrounding the bers.
  • the bers become suitably prepared for the further treatment consisting in the complete separation from the matter uniting the fibers.
  • the thus prepared pulp diluted to the proper density is fed in a concentrated stream under high pressure into a chamber and subjected to mechanical oscillation at high frequency thereby separating the fibers from each other and Iseparating and washing adhesives, coloring matter such as print-ing ink and other matter from the fibers.
  • the fibers thus obtained will have a good felting quality and can be easily screened from the other matter contained in the original waste paper. Fiber losses are avoided in a screening system arranged behind the lfiber loosening apparatus since the fibers in the stock entering the screening system will be completely separated from each other and the stock will not contain agglomeration of unpulped paper.
  • FIG. 1 is a schematic fiow sheet of a plant for processing waste paper for subsequent manufacture of paper or cardboard therefrom;
  • FIG. 2 is a schematic side View of the fiber loosening apparatus according to the present invention.
  • FIG. 3 is a top view of the apparatus shown in FIG. 2;
  • FIG. 4 is a partial cross sectional view of the apparatus shown in FIGS. 2 and 3 and drawn to an enlarged scale.
  • FIG. 1 of the same in which the overall arrangement of apparatus for processing waste paper for subsequent production into paper or cardboard is shown in the form of a schematic flow sheet, it will be seen that such an arrangement preferably comprises a vortex pulper y1 of known construction into which waste paper in the form of bundles or in loose form is fed as indicated by the arrow A together with diluting water, as indicated by the arrow B which preferably includes a certain amount of disinfecting material continuously fed into the stream of diluting water by a dosing apparatus of known construction and not shown in the drawing.
  • the mixture of waste paper and diluting liquid is subjected in the vortex pulper 1 to a rough pulping operation and heavy unpulpable impurities are discharged from the pulper while the thus produced stock is fed into the mixing tank 2 provided with partitions 2 to cause further sedimentation of unpulpable heavy parts which are discharged from the mixing tank while the remaining stock is fed by the pump 3 into a thickening filter 4 where the stock is thickened and subjected to a washing operation.
  • the thickened stock is fed by the pump 5 into the top of a storage and hydration tower 6 in which the fibers are subjected to swelling and hydration -to prepare the same in the manner as mentioned above for their subsequent processing.
  • the storage and hydration tower 6 has a height of 8-12 meters so that a considerable amount of densified pulp can be stored therein to be subjected to an extended hydration and swelling preferably for a time of 48 to 76 hours.
  • a plurality of mixing impellers 6" one of which is schematically shown in FIG. 1, may be provided in the bottom region of the tower 6 to properly ⁇ mix the diluting water fed through the nozzle 6 into the 'bottom region of the tower with the stock therein.
  • the thus diluted stock is fed by a pump 8 into a mixing tank 9 which may also be provided with partitions similar to the partitions 2 of the mixing tank 2 and heavy unpulpable parts still retained in the stock will settle at the bottom of the mixing tank 9 and so that they can be discharged therefrom while ythe thus further clarified stock is fed by the pump 10 under high pressure in the fiber loosening apparatus 11, schematically shown in FIG. 1, and which will be described in further detail later on.
  • the fiber loosening apparatus the stock is subjected to oscillations of high frequency to separate the fibers from each other and from the material bonding the fibers to each other in the waste paper. From the fiber loosening apparatus 11 the stock is fed by the pump 12 or by gravity into a screening system 13 from where it is discharged and further processed in the manner as known in the art.
  • a plurality of such towers may be used, and in this case a proper distribution piping system has to be provided between the pump 5 and the upper inlet ends of the various towers, as well as between the outlet ends of the various towers and the pump 8 so that the towers may be supplied with stock and stock be discharged from the towers in any desired sequence.
  • FIGS. 2 and 3 illustrate respectively in a side view and in a top view the fiber loosening apparatus 11 and the feed pump 10 connected thereto, which are schematically shown in the flow sheet of FIG. 1.
  • the stock from the mixing tank 9 is fed by the pump 10, which may be a centrifugal pump of known construction, into distributor head 17 arranged at the outlet end of the pump 10.
  • the centrifugal pump 10 ⁇ is driven, for instance, by an electromotor 14 over a gear reduction unit 15 mounted with the motor 14 and the pump 10 on a common bed plate 16.
  • the hollow substantially cylindrical distributor head 17 mounted on the outlet end of the pump 10 and communicating ltherewith has in the interior thereof a substantially conical deflector 17a guiding the pulp fed under high pressure by the pump 10 into the distributor head 17 into four pipe nipples 18 projecting upwardly from the cover of the distributor head.
  • the flow of pulp through the nipples 18 is controlled by valves 19 and manometers 20 arranged downstream of the valves are provided for indicating the pressure of the pulp passing through the nipples 18.
  • Pressure hoses 21 respectively connect the outlet ends of the nipples 18 with nozzle means 24 of the fiber loosening apparatus 11.
  • the fiber loosening apparatus 11 includes a cylinder or chamber means 22 closed at the top and the bottom and mounted on a support frame or casting 31.
  • the cover 23 of the chamber means 22 carries a plurality of nozzle means 24, four nozzle means are shown in the apparatus illustrated, which extend with lower portions thereof through corresponding openings in the cover 23.
  • Each of the nozzle means 24 is provided with a gate valve 25 for a purpose las will be described later on.
  • Coaxially arranged with the outlet end of each nozzle means 24 are vibrator means 26, one of which is schematically shown in FIG. 2.
  • An outlet conduit 30 communicates with the interior of the chamber means 22 for discharging the pulp after the same has been processed in the chamber means therefrom and the apparatus includes further at the bottom of the chamber 22 an auxiliary discharge opening normally closed by the valve 29 for discharge of sediments settling at the bottom of the chamber into sludge discharge conduit 28.
  • FIG. 4 shows in section and on an enla-rged scale one of the nozzle means 24 mounted on the cover 23 of the chamber means 22, as well as the vibrator means 26 and the gate valve 25 coordinated with the nozzle means.
  • FIG. 4 shows one of the openings 23 formed in the cover 23 of the chamber means 22 and an annular member 32, preferably in the form of a casting, Coaxially arranged with the opening 23 and held on the cover 23 in any convenient manner, for instance, by screws not shown in the drawing.
  • a tubular member 33 projects upwardly from the annular member 32 Coaxially arranged therewith and this tubular member 33 has a lower flange 34 and an upper flange 35.
  • the tubular member 33 is fluidtightly held on the annular member 32 by means of screw bolts 34 extending through openings in the lower flange 34 of the tubular member 33 into corresponding threaded bores in the annular member 32.
  • an outer guide sleeve 36 Coaxially arranged with the tubular member 33 and extending with a lower portion thereinto is an outer guide sleeve 36 having at the lower end thereof a radially extending flange 38 of an outer diameter substantially equal to the inner diameter of the tubular member 33 so as to slidably engage the inner surface of the tubular member.
  • the guide sleeve 36 has intermediate its ends a flange 37 abutting against the upper ilange 35 of the tubular member 33 and connected thereto, when the nozzle means is in its operating position as shown in FIG. 4, by three screw bolts and nuts 43, only one of which is shown in FIG. 4.
  • an inner sleeve 39 Coaxially arranged within the outer guide sleeve 36 is an inner sleeve 39 having an outer diameter substantially equal to the inner diameter of the guide sleeve 36 so that the inner sleeve is slidably guided in the outer guide sleeve 36.
  • the inner sleeve 39 is preferably counterbored at the lower end thereof and the cylindrical wall of the counterbore is formed with a screw thread engaging with a corresponding screw thread on the outer cylindrical surface of a nozzle part 39' arranged in the counterbore of the inner sleeve 39.
  • the nozzle part 39 is formed with a conical bore therethrough gradually tapering from the inner diameter of the inner sleeve 39 toward the outlet end of the nozzle part 39.
  • Coaxially arranged with the outer guide sleeve 36 is another tubular member 44 having an inner diameter substantially equal to that of the outer guide sleeve 36.
  • a ilange 45 at the upper end of the inner tubular member 44 abuts against the lower flange 38 of the guide sleeve 36 and is connected thereto by screw bolts 46.
  • the flange 45 has an outer diameter substantially equal to that of the flange 38 so that the flange 4S is likewise slidably guided in the outer tubular member 33.
  • Vibrator means are arranged coaxially with the nozzle means 24 below the outlet end of the nozzle member 39 in the inner tubular member 44.
  • the vibrator means include a vibrator body 47 of substantially cylindrical shape and having a conical upper end 48 tapering toward the outlet end of the nozzle member 39'.
  • the vertex angle of the conical end 48 is-preferably between 60 and 120.
  • the lower end of the vibrator body 47 may also be tapered as shown in FIG. 4.
  • the vibrator body 47 is carried by means of four set screws 49 extending through threaded bores in the inner tubular member 44 and engaging with the pointed ends thereof into corresponding cavities of the body 47.
  • the set screws 49 are arranged to support the elongated vibrator body 47 at nodal points of its elastic vibration.
  • the vibration of the vibrator body may be obtained by the stream of pulp under high pressure leaving the outlet end of the nozzle and being divided by the vibrator body 47, or the vibration may also be electrically produced, for instance, the vibrator body may be in the form of a magneto-strictive oscillator, well known in the art, in which case the body 47 is provided with a winding 47' connected to a source of high frequency current. In either case the vibrator body is constructed to vibrate at a frequency in the range of 1.5 to 45K c.p.s.
  • the tubular member 44 is formed in its cylindrical wall with large openings 44 therethrough so that the vibrations produced may expand laterally beyond the member 44.
  • the tapered end 48 of the vibrator body 47 is spaced a small distance, that is, 5 to 25 mm., from the outlet end of the nozzle part 39.
  • a rotary cap nut 40 is mounted in the region of the upper end of the inner sleeve 39 of the nozzle means 24 coaxially therewith and held against axial displacement with respect to the inner sleeve 39 between a shoulder on the sleeve and a snap ring 41, while being rotatable about the axis of the inner sleeve 39.
  • the nut 40 is provided with an inner screw thread cooperating with an outer screw thread on the upper end of the outer guide sleeve 36 so that by turning the nut 40 about its axis, the relative axial position of the inner sleeve 39 relative to the guide sleeve 36 may be changed and therewithrthe spacing between the outlet end of the nozzle part 39' and the tapered end 48 on the vibrator body 47.
  • the upper end of the inner sleeve 39 is provided with an outer screw thread cooperating with an inner screw thread of a tting on the end ofl the respective pressure hose 21 for connecting the respective pressure hose to the respective nozzle means.
  • the nozzle means 24 together with the vibrator means 26 carried thereby may be raised from the working position shown in lFIG. 4 to a cleaning position in which the lower flange 38 of the guide sleeve is substantially flush with the top rim of the outer tubular member 33.
  • three guide pins 50 are provided projecting angularly displaced through angles of 120 from each other upwardly from the flange 35 and extending through corresponding bores in the ilange 37 of the outer guide sleeve 36.
  • a nut 51 may be provided at the upper end of one of the guide pins 50 to limit the upward movement of the nozzle means 24.
  • the cap nut 40 When the nozzle means is raised to the cleaning position, the cap nut 40 may be unscrewed and the inner sleeve 39 with the nozzle part 39 may be subsequently removed from the guide sleeve for proper cleaning of the inner sleeve and the nozzle.
  • a gate valve 25 is provided for each of the nozzle means 24.
  • the gate valve 25' may include a blade 52 guided in an appropriate slot 52 of the annular member 32.
  • the outer end of the blade 52 extending, as viewed in FIG. 4, to the left of the annular member 32 is ixedly connected, for instance, by rivets, to the forked end of a threaded spindle 53 cooperating with a nut 5S to which a hand wheel 54 is keyed for turning the nut 55 about its axis.
  • the nut 55 is held against axial displacement by the member 57 connected to the left end, as viewed in FIG. 4, of the annular member 32 by studs 58 as well as by the counternut 56 engaging the left end of the hub of the hand wheel 54.
  • the ber loosening apparatus 11 above described will operate as follows:
  • Pulp of a density of 0.5 to 5% from the mixing tank 9 is fed by the centrifugal pump 10 through lthe distributor head 17 and the plurality of pressure hoses 21 at high pressure, in the order of to 230 ⁇ and preferably at a pressure of about 210 lbs. per square inch into the respective nozzle means 24 so that in each of the nozzle means a concentrated stream of pulp under high pressure and high speed leaving the outlet end of the nozzle part 39 will impinge onto the conical end 48 of the vibrator body 47 and the latter vibrating at a frequency of 1.5 to 45K c.p.s. will thereby subject the stream to mechanical vibrations of high frequency.
  • the mechanical vibrations thus produced will expand from the vibratory Ibody 47 into the surrounding stock in the chamber means 22 to cause a perfect separation of the iibers in the stock from each other and the separa-tion of the bers from any binding and similar material holding the fibers together.
  • the separation of the fibers from substances which bind the same together is obtained by the abrupt change of the pressure at the nozzle outlet and the simultaneous effect of mechanical vibrations in the chamber 22. This separation will occur without breaking of the fibers in small fragments.
  • the nal pulp stock is discharged from the chamber means 22 through the conduit 30 while impurities and sludge will settle at the bottom of the chamber means from which they are intermittently discharged through the valve 29 into the sludge discharge conduit 28.
  • Waste paper and even cardboard of practically any kind can be processed with the method and apparatus of the present invention with the exception of parained papers, bituminous papers or other heavily coated or impregnated papers.
  • a method of loosening fibers of waste paper comprising the steps of mixing waste paper and water and subjecting the mixture to a coarse pulping operation; thickening the pulp thus obtained; feeding the thickened pulp into a storage tank and subjecting it therein to swelling and hydration; discharging said pulp from said tank while diluting it to a smaller density; subjecting a stream of the diluted pulp to mechanical vibrations of high frequency for loosening the fibers; and finally screening said pulp.
  • a method of loosening fibers of waste paper comprising the steps of mixing Waste paper and water and subjecting the mixture to a coarse pulpng operation; thickening the pulp thus obtained to a density of itl-22%; feeding the thickened pulp into a storage tank and subjecting it therein to swelling and hydration; discharging said pulp from said tank while diluting it to a density of 0.5-%; subjecting a stream of the diluted pulpto mechanical vibrations in longitudinal direction of the stream and at a frequency range of 1.5-45K c.p.s. for loosening the fibers; and finally screening said pulp.
  • a method of loosening fibers of waste paper comprising the steps of mixing waste paper and water and subjecting the mixture to a coarse pulping operation; thickening the pulp thus obtained; feeding the thickened pulp into a storage tank and subjecting it therein to swelling and hydration; discharging said pulp from said tank while diluting it to a smaller density; feeding the diluted pulp under pressure in a concentrated stream in one direction; subjecting said stream to mechanical vibrations longitudinal said one direction at a frequency range of 1.5-45K c.p.s. for loosening the fibers; and finally screening said pulp.
  • chamber means for loosening fibers of waste paper pulp
  • nozzle means having an outlet end communicating with the interior of said chamber means for directing a pressurized stream of pulp into said chamber means
  • vibrator means axially aligned ⁇ with said nozzle means adjacent said outlet end and vibrating in longitudinal direction of said stream and at high frequency for subjecting said stream to mechanical vibrations.
  • chamber means for loosening fibers of waste paper pulp
  • nozzle means having an outlet end communicating with the interior of said chamber means for directing a pressurized stream of pulp intosaid chamber means
  • vibrator means axially aligned with said nozzle means adjacent said outlet end and vibrating at high frequency for subjecting said stream to mechanical vibrations, said vibrator means vibrating longitudinal in the direction of said stream at a frequency range of 1.5-45K c.p.s.
  • chamber means for loosening fibers of Waste paper pulp
  • nozzle means having an outlet end communicating with the interior of said chamber means for directing a pressurized stream of pulp into said chamber means
  • vibrator means axially aligned with said nozzle means adjacent said outlet end and vibrating at high frequency in axial direction for subjecting said stream to mechanical vibrations in longitudinal direction of said stream
  • said vibrator means including a vibrator body axially aligned with said outlet end of said nozzle means and having a tapered end facing said outlet end of said nozzle means.
  • chamber means for loosening fibers of waste paper pulp
  • nozzle means having an outlet end communicating with the interior of said chamber means for directing a pressurized stream of pulp into said chamber means
  • vibrator means axially aligned with said nozzle means adjacent said outlet end and vibrating in axial direction at high frequency for subjecting said stream to mechanical vibrations in longitudinal direction of said stream
  • said vibrator means including a substantially cylindrical vibrator body axially aligned with said outlet end of said nozzle means and having a conical end tapering toward said outlet end of said nozzle means.
  • chamber means for loosening fibers of waste paper pulp
  • nozzle means having an outlet end communicating with the interior of said chamber means for directing a pressurized stream of pulp into said chamber means
  • vibrator means axially aligned with said nozzle means adjacent said outlet end and vibrating in axial direction at high frequency for subjecting said stream to mechanical vibrations in longitudinal direction of said stream
  • said vibrator means including a substantially cylindrical vibrator body axially aligned with said outlet end of said nozzle means and having a conical end of a vertex angle of 60-l20 tapering toward said outlet end of said nozzle means and being spaced from said outlet end of said nozzle means a distance of 5-25 mm.
  • chamber means having a cover formed with at least one opening therethrough; nozzle means extending through said opening in said cover for directing a pressurized stream of pulp into said chamber means, said nozzle means having an outlet end', vibrator means ⁇ axially aligned with said nozzle means adjacent said outlet end and vibrating in axial direction at high frequency for subjecting said stream to mechanical vibrations in longitudinal direction of said stream; and support means on said cover and mounting said nozzle means and said vibrator means movable between a working position in which said outlet end of said nozzle means and said vibrator means are located in said chamber means, and a withdrawn position in which said nozzle means and said vibrator means are withdrawn through said opening in said cover to the outside of said chamber means.
  • chamber means having a cover formed with at least one opening therethrough; nozzle means extending through said opening in said cover for directing a pressurized stream of pulp into said chamber means, said nozzle means having an outlet end; vibrator means axially aligned with said nozzle means adjacent said outlet end and vibrating in axial direction at high frequency for subjecting said stream to mechanical vibrations in longitudinal direction of said stream; support means on said cover and mounting said nozzle means and said vibrator means movable between la working position in which said outlet end of said nozzle means and said vibrator means are located in said chamber means, and a withdrawn position in which said nozzle means and said vibrator means are Withdrawn through said opening in said cover to the outside of said chamber means; and gate means for closing said opening in said cover when said nozzle and vibrator means are in said withdrawn position.
  • chamber means having a cover formed with at least one opening therethrough; nozzle means extending through said opening in said cover for directing a pressurized stream of pulp into said chamber means, said nozzle means including an outer guide sleeve and an inner sleeve slidably guided in axial direction in said outer guide sleeve and having a converging outlet end, and means for axially shifting said inner sleeve relative to said guide sleeve for adjusting the axial position of said outlet end; vibrator means connected to said guide sleeve to be carried thereby axially aligned with said nozzle means adjacent s-aid outlet end and vibrating in axial direction at high frequency for subjecting said stream to mechanical vibrations yin longitudinal direction of said stream; support means on said cover and connected to said guide sleeve for mounting said nozzle means and said vibrator means movable between a working position in which said outlet end of said nozzle means and said vibrator
  • chamber means having an outlet end for directing a pressurized stream of pulp into said chamber means; and an elongated vibrator body 10 axially aligned with said nozzle means and having a pointed end directed toward ⁇ and being spaced a short distance from said outlet end of said nozzle means, said vibrator body being constructed and mounted to be vibrated at high frequency in lthe direction of its elongation by the pressurized stream of pulp impinging on said pointed end, whereby said stream of pulp is subjected by said vibrator body to high frequency mechanical vibrations.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
US40087064 1963-10-04 1964-10-01 Method and apparatus for loosening fibers of waste paper Expired - Lifetime US3330487A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS544163A CS159654B1 (de) 1963-10-04 1963-10-04

Publications (1)

Publication Number Publication Date
US3330487A true US3330487A (en) 1967-07-11

Family

ID=5399324

Family Applications (1)

Application Number Title Priority Date Filing Date
US40087064 Expired - Lifetime US3330487A (en) 1963-10-04 1964-10-01 Method and apparatus for loosening fibers of waste paper

Country Status (7)

Country Link
US (1) US3330487A (de)
AT (1) AT266574B (de)
CS (1) CS159654B1 (de)
FI (1) FI45676C (de)
GB (1) GB1002934A (de)
NO (1) NO124167B (de)
SE (1) SE315487B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0028658A1 (de) * 1979-11-08 1981-05-20 Hermann Finckh Maschinenfabrik GmbH & Co. Verfahren und Vorrichtung zum Aufbereiten von Altpapier
US4465591A (en) * 1979-10-17 1984-08-14 Hermann Finckh Maschinenfabrik Gmbh & Co. Method and apparatus for treating waste paper
FR2583793A1 (fr) * 1985-06-22 1986-12-26 Voith Gmbh Procede et installation pour le recyclage de vieux papiers.
CN105696393A (zh) * 2014-07-21 2016-06-22 江苏金沃机械有限公司 一种湿强废纸再利用化学机械制浆方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2363937A (en) * 1941-10-09 1944-11-28 Cities Service Oil Co Method and apparatus for preparing dispersions
US3039703A (en) * 1958-12-24 1962-06-19 Mineral Ind Corp Of America Method and apparatus for reducing particle size
US3058674A (en) * 1961-06-22 1962-10-16 George K Kocher Apparatus for comminuting materials

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2363937A (en) * 1941-10-09 1944-11-28 Cities Service Oil Co Method and apparatus for preparing dispersions
US3039703A (en) * 1958-12-24 1962-06-19 Mineral Ind Corp Of America Method and apparatus for reducing particle size
US3058674A (en) * 1961-06-22 1962-10-16 George K Kocher Apparatus for comminuting materials

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4465591A (en) * 1979-10-17 1984-08-14 Hermann Finckh Maschinenfabrik Gmbh & Co. Method and apparatus for treating waste paper
US4566942A (en) * 1979-10-17 1986-01-28 Hermann Finckh Maschinenfabrik Gmbh & Co. Method of and apparatus for treating waste paper
EP0028658A1 (de) * 1979-11-08 1981-05-20 Hermann Finckh Maschinenfabrik GmbH & Co. Verfahren und Vorrichtung zum Aufbereiten von Altpapier
FR2469496A1 (fr) * 1979-11-08 1981-05-22 Finckh Maschf Procede et dispositif pour le traitement des vieux papiers
FR2583793A1 (fr) * 1985-06-22 1986-12-26 Voith Gmbh Procede et installation pour le recyclage de vieux papiers.
CN105696393A (zh) * 2014-07-21 2016-06-22 江苏金沃机械有限公司 一种湿强废纸再利用化学机械制浆方法
CN105696393B (zh) * 2014-07-21 2017-09-08 江苏金沃机械有限公司 一种湿强废纸再利用化学机械制浆方法

Also Published As

Publication number Publication date
FI45676B (de) 1972-05-02
FI45676C (fi) 1972-08-10
CS159654B1 (de) 1975-01-31
SE315487B (de) 1969-09-29
NO124167B (de) 1972-03-13
GB1002934A (en) 1965-09-02
AT266574B (de) 1968-11-25

Similar Documents

Publication Publication Date Title
US2954173A (en) Process for cleaning and pulping waste
US3437204A (en) Screening apparatus
FI64198C (fi) Anrikningsfoerfarande foer avfallspapper
US3844488A (en) Apparatus for pulping and grading of waste paper
US3947314A (en) Method of treating paper fibers in a stationary screen
US5240115A (en) Field adjustable hydrocyclone
US5096127A (en) Apparatus for pressurized screening of a fibrous material liquid suspension
US4726880A (en) Method and apparatus for improving the quality of paper manufactured from recycled paper with a hydrokinetic amplifier
US3764005A (en) Hydrocyclone pulp cleaner
US3330487A (en) Method and apparatus for loosening fibers of waste paper
US3353752A (en) Liquid spraying or screening device
US2460884A (en) Art of mixing a plastic mass in a liquid
NO128122B (de)
US5423993A (en) Fiber recovery system and process
FI97736B (fi) Menetelmä ja laitteisto täyteainepitoisen materiaalin, kuten kierrätyskuidun käsittelyyn
CN101802298A (zh) 用于制造纤维浆悬浮液的设备和方法
US2323077A (en) Starch manufacturing process
RU2568791C1 (ru) Комплекс для переработки бумаги
CN104652153B (zh) 转鼓式碎浆机
US2573048A (en) Starch manufacturing process
US1599502A (en) Centrifugal separator
US2207218A (en) Process for removal of dirt from pulp
US4420117A (en) Waste paper disintegrating, sorting and fiber recovery apparatus
US6205675B1 (en) Dehydration machine
US2910398A (en) Asphalt dispersion in waste cellulosic material