US3682398A - Apparatus for preparing paper pulp or any other product of a similar nature, from bales of cellulose or raw materials for recovery, such as waste paper - Google Patents

Apparatus for preparing paper pulp or any other product of a similar nature, from bales of cellulose or raw materials for recovery, such as waste paper Download PDF

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Publication number
US3682398A
US3682398A US856343A US3682398DA US3682398A US 3682398 A US3682398 A US 3682398A US 856343 A US856343 A US 856343A US 3682398D A US3682398D A US 3682398DA US 3682398 A US3682398 A US 3682398A
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Prior art keywords
tank
rotor
fins
frusto
set forth
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Expired - Lifetime
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US856343A
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English (en)
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Pierre Louis Lamort
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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
    • D21D1/00—Methods of beating or refining; Beaters of the Hollander type
    • D21D1/20—Methods of refining
    • D21D1/32—Hammer mills

Definitions

  • the first operation consists in disintegrating the materials in the presence of water, so as to produce a substantially homogenous aqueous suspension.
  • the operation cannot be performed in this way if the aqueous suspension is fluid enough to be able to flow i.e. the concentration of dry material in the water must not be too high.
  • the concentration of the cellulose material in relation to the water can hardly exceed 7-8 percent, and this has the following disadvantages:
  • the material is cellulose material for recovery, such as waste paper it becomes progressively more difficult to disintegrate the material in the cold state, since such paper is nowadays being progressively more strongly glued or sized with various plastics materials.
  • Another aspect of the problem of treating cellulose materials must be considered when the materials are formed by dirty waste paper, since such paper is progressively containing more and more foreign bodies I forming impurities for paper, such as inter alia all the various plastics materials which the paper may contain. Clearly, during treatment all these impurities must be eliminated; a fairly large number of processes exist for this purpose and apparatuses for performing them.
  • the invention provides an apparatus for disintegrating cellulose raw materials and highly concentrated waste paper and cardboard for the preparation of paper pulp, the apparatus being characterized in that it is formed by a tank which is adapted to receive the raw material and is slowly rotated so as to make the raw material turn over and fall back upon itself, the axis of rotation of the tank being inclined, the tank being combined with a rotor formed with projecting edges which is disposed inside the tank and rapidly rotated to disintegrate the material.
  • the lower portion of the tank is formed with perforations of suitable shape and size, such portion of the tank enclosed by a collector for collecting the disintegrated material.
  • the rotor is mounted with provision for axial displacement by a known thrust drive, the rotor being received in a corresponding opening in the end of the tank, the opening and the rotor so co-operatin g that, in dependence on the axial position of the rotor, a circular slot of varying width appears for the evacuation of the disintegrated material, the end of the tank being enclosed by a collector to this end.
  • the perforations in the frusto-conical portion of the tank which are swept by the fins of the rotor are formed by slots open in the direction of the minor base of the frustoconical portion, such slots being inclined in relation to the generatrices of the frusto-conical portion and in relation to the fins, so that the impurities trapped between the slots and the fins are driven by the latter in the direction of the openings of the slot.
  • the portion of the end of the tank enclosing the rotor comprises a chamfer whose pointed edge is disposed on the inside of the tank, and the rotor comprises a substantially disc-shaped portion whose face turned towards the inside of the tank is formed with projecting edges, the periphery of the rotor rotating with a small clearance in relation to the pointed edge of the chamfer, the disc surface turned towards the. inside of the tank determining, by its position in relation to the pointed edge of the chamfer, an opening of varying size for the disintegrated material, so that a portion of thickness D of the material thrown by the turbine passes through the opening thus formed, the opening being equivalent to a screening of the material through slots of width D.
  • the height of the projecting edge is greater at the periphery of the rotor than towards the center.
  • the arrangements according to the invention obviate the necessity of the whole mixture being churned up by the rapid disintegrating rotor, since such churning up can be produced by a slow movement of the tank assembly.
  • FIG. 1 is a sectional elevation of a first embodiment of an apparatus according to the invention
  • FIG. 2 is a sectional elevation of a second embodiment of the invention.
  • FIG. 4 is a sectional elevation of a third embodiment of the invention.
  • a shaft 9 retained by a bearing 8 extends through the hollow journal 6 and bears a disintegrating rotor 2 generally of frusto-conical shape.
  • the tank 1 and the disintegrating rotor are rotated around their respective axes which as a rule coincide with one another but may in some cases differ from one another.
  • the speed of rotation of the tank 1 will be slow and that of the rotor 2 fast, the directions of rotation being identical or opposite.
  • the shaft 9 carrying the rotor 2 may be driven directly by a motor M whereas the hollow journal 6 to which the tank 1 is connected may be driven from a motor M over a spaced reducing gearing 20, 21 as schematically illustrated in FIG. 1.
  • the tank 1 has an emptying gate 5 which can be manually or mechanically opened; in the latter case a device (not shown) can readily be provided which enables the door to be opened while the tank is rotating.
  • the periphery of the rotor 2 is formed with radially and axially projecting fins 2a whose number and shape can vary in dependence on the various materials for treatment.
  • the outer edges of the fins extend at the end of the rotor 2 adjacent the bottom end of the tank further away from the axis of rotation than at the other end of the rotor.
  • the apparatus according to the invention allows hot treatment; to this end it is enough to use hot water and, if necessary, to heat-insulate the tank 1.
  • treatment is to be performed at a temperature above C, it is enough to provide an autoclave cover which closes the opening 10 and to supply the heat, for instance, steam, through the hollow journal 6.
  • the apparatus shown in FIG. 1 performs intermittent treatment; for treatment to be continuous, with the continuous separation and evacuation of the impurities, it is enough to provide an apparatus such as that shown in FIG. 2.
  • the portion la of the conical base of the tank 1 is also formed by perforated plates forming a screen.
  • the tank 1 is slowly rotated and the rotor 2 is quickly rotated.
  • the material to be treated and a certain amount of water is charged via the hopper 10, the material then being rolled around and constantly turned over in the tank 1.
  • the material is constantly brought into contact with the rotor 2 which, due to its speed, disintegrates the material.
  • the adequately disintegrated material passes through the perforations of the screen 1a, while the portion of the element inadequately divided and the impurities which cannot pass through the screen la are thrown back inside the tank 1 where they continue to undergo the disintegrating treatment.
  • elements which have been unable to pass through the screen 1a come into the zone of the screen 1d where they undergo further disintegration which enables them to pass through the screen 1d.
  • the impurities which could not be divided are retained by the screen 1d and make their way to the zone of screen If accompanied by a residue of material which has not yet had the time to pass through the screen 1d.
  • the screen If then acts like a sizing drum and finally releases the impurities from the satisfactory material which they still contain.
  • the fully screened impurities leave via the open end lg and drop into the collector 11b, while the disintegrated material is collected in the collector 1 l and recovered via the outlet 1 la.
  • the apparatus shown in FIG. 2 therefore continuously produces a disintegrated and purified cellulose pulp of high density and also continuously evacuates the impurities in the material to be treated.
  • the screens la, 1d and 1f can be cleaned during operation, either continuously or periodically, from outside by means of either a scraper, jets of air, steam or water, in any known manner.
  • the perforations are formed by slots 17 having a width corresponding to the sizes of the particles of the disintegrated material.
  • the slots 17 are open at the inner end 17a and form an angle 60 smaller than 90 with a circle 18.
  • the object of the resulting grid is to obviate the following disadvantage: particles 1b of material thrown on to the grid by the fins 2b of the rotor 2 have a tendency to accumulate at the edge of the openings of the grid, due to the speed at which they impinge on the grid. If the slots are perpendicular to the direction of movement of the fins 26 of the rotor 2 they are therefore rapidly clogged up; if the slots are parallel to the direction of movement, the material accumulates at.
  • the end 1h of the tank 1 is formed with an opening receiving a rotor 2 with a disc-shaped portion 2c with a small clearance j.
  • the rotor can be moved axially by abutment 9a, 9b and a drive 12 articulated at a place 13.
  • the end opening 1h has a chamfer 14 whose pointed edge is on the face of the joint 1h facing towards the inside of the tank 1.
  • This device therefore enables the apparatus to be unloaded while performing the screening of the particles forming the material under treatment.
  • the device also enables the apparatus to operate continuously, due to the screening thus performed, which allows to escape only adequately processed material freed from its main impurities.
  • the fineness of screening thus performed can be adjusted during operation, since it depends mainly on the distance D, much more than on the clearance j, between the diameters of the disc 20 and the opening.
  • the fact is that the trajectories B of the particles at the outlet from the rotor 2, in view of the speed thereof, are substantially rectilinear and continuous in a plane normal to the axis of rotation, so that screening consists in separating, by the pointed edge of the chamfer 14, a portion of material having a thickness equal to the distance D.
  • the periphery of the disc 20 can be formed with a succession of projections whose height H is greater than the distance apart D, and which are circumferentially spaced from each other through a distance L which is smaller than one smallest flat dimension of the thin particles 16 to be separated. If one of these particles 16 is considered, it can be seen that as a rule it comes to the rotor 2 flat, and in view of the spacing L, the particle cannot be introduced between two projections 15 and is as a result obliged to follow the trajectory A and is therefore separated from the accepted material which follows the trajectory B.
  • the lower perforate portion of the tank is formed by a frusto-conical portion followed by a cylindrical portion and another frusto-conical portion, having an aperture in its minor base, the whole being enclosed by a collector, the rotor being formed by a cylindrical portion with projecting fins received with a small clearance in the cylindrical portion of the tank, and by a frusto-conical portion disposed in the actual tank, whose frusto-conical portion is swept by fins unitary with the rotor, the fililii'wifillili %le l"ilgugi ui' glioli 3i?? tions of the tank, and an outlet for the retained impurities at the end of the tank.

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  • Crushing And Pulverization Processes (AREA)
US856343A 1969-08-25 1969-09-09 Apparatus for preparing paper pulp or any other product of a similar nature, from bales of cellulose or raw materials for recovery, such as waste paper Expired - Lifetime US3682398A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6928999A FR2057511A6 (de) 1969-08-25 1969-08-25

Publications (1)

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US3682398A true US3682398A (en) 1972-08-08

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US856343A Expired - Lifetime US3682398A (en) 1969-08-25 1969-09-09 Apparatus for preparing paper pulp or any other product of a similar nature, from bales of cellulose or raw materials for recovery, such as waste paper

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US (1) US3682398A (de)
DE (1) DE1946396C3 (de)
FR (1) FR2057511A6 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5551641A (en) * 1994-09-30 1996-09-03 The United States Of America As Represented By The Secretary Of The Navy Non-pulpables collection chamber with removable basket for solid waste pulpers
US6516638B1 (en) * 1998-01-09 2003-02-11 Monotub Plc Washing machine
US20040031295A1 (en) * 2000-11-17 2004-02-19 Seung-Bong Choi Drum type washing machine with rotatable baffle
CN103374846A (zh) * 2012-04-18 2013-10-30 三菱重工环境·化学工程株式会社 解纤装置以及污泥脱水装置
US20160256005A1 (en) * 2015-03-06 2016-09-08 Blendtec, Inc. Mixer apparatus and method
US10035734B2 (en) * 2016-03-10 2018-07-31 James Chun Koh Food waste treatment apparatus
US10350513B2 (en) * 2015-06-04 2019-07-16 Technip France Facility for mixing/separating immiscible liquids

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2363665A1 (fr) * 1976-09-03 1978-03-31 Lamort E & M Perfectionnements aux pulpeurs pour la desintegration des matieres de recuperation sales et tres dures, notamment des matieres resistantes a l'etat humide
FR2441681A1 (fr) * 1978-11-17 1980-06-13 Lamort E & M Perfectionnements aux procedes et appareils de desintegration de matieres cellulosiques

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2575380A (en) * 1949-12-08 1951-11-20 Pennsylvania Crusher Co Crusher mill
DE958250C (de) * 1951-05-09 1957-02-14 Schwenk Zementwerke G M B H E Vorrichtung zum Herstellen und Foerdern von Moertel od. dgl.
US3115821A (en) * 1959-01-24 1963-12-31 Bauermeister Hermann Maschf Machine for treating bulk chocolate
US3329350A (en) * 1964-05-25 1967-07-04 Otis Gay Pulverising apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2575380A (en) * 1949-12-08 1951-11-20 Pennsylvania Crusher Co Crusher mill
DE958250C (de) * 1951-05-09 1957-02-14 Schwenk Zementwerke G M B H E Vorrichtung zum Herstellen und Foerdern von Moertel od. dgl.
US3115821A (en) * 1959-01-24 1963-12-31 Bauermeister Hermann Maschf Machine for treating bulk chocolate
US3329350A (en) * 1964-05-25 1967-07-04 Otis Gay Pulverising apparatus

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5551641A (en) * 1994-09-30 1996-09-03 The United States Of America As Represented By The Secretary Of The Navy Non-pulpables collection chamber with removable basket for solid waste pulpers
US5669560A (en) * 1994-09-30 1997-09-23 The United States Of America As Represented By The Secretary Of The Navy Non-pulpables collection chamber with removable basket for solid waste pulpers
US6516638B1 (en) * 1998-01-09 2003-02-11 Monotub Plc Washing machine
US20040031295A1 (en) * 2000-11-17 2004-02-19 Seung-Bong Choi Drum type washing machine with rotatable baffle
US7441422B2 (en) * 2000-11-17 2008-10-28 Lg Electronics Inc. Drum type washing machine with rotatable baffle
CN103374846A (zh) * 2012-04-18 2013-10-30 三菱重工环境·化学工程株式会社 解纤装置以及污泥脱水装置
CN103374846B (zh) * 2012-04-18 2015-07-22 三菱重工环境·化学工程株式会社 解纤装置以及污泥脱水装置
US20160256005A1 (en) * 2015-03-06 2016-09-08 Blendtec, Inc. Mixer apparatus and method
US10111558B2 (en) * 2015-03-06 2018-10-30 Blendtec, Inc. Mixer apparatus and method
US10350513B2 (en) * 2015-06-04 2019-07-16 Technip France Facility for mixing/separating immiscible liquids
US10035734B2 (en) * 2016-03-10 2018-07-31 James Chun Koh Food waste treatment apparatus

Also Published As

Publication number Publication date
DE1946396C3 (de) 1981-02-05
DE1946396B2 (de) 1980-04-30
FR2057511A6 (de) 1971-05-21
DE1946396A1 (de) 1971-03-04

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