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WO2000028138A2 - Dispositif pour l'alimentation d'un flux de materiaux fibreux en suspension sur une toile de formation d'une machine a fabriquer le papier - Google Patents

Dispositif pour l'alimentation d'un flux de materiaux fibreux en suspension sur une toile de formation d'une machine a fabriquer le papier Download PDF

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Publication number
WO2000028138A2
WO2000028138A2 PCT/US1999/024743 US9924743W WO0028138A2 WO 2000028138 A2 WO2000028138 A2 WO 2000028138A2 US 9924743 W US9924743 W US 9924743W WO 0028138 A2 WO0028138 A2 WO 0028138A2
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
aerosuspension
cylindrical body
feeding
flow
Prior art date
Application number
PCT/US1999/024743
Other languages
English (en)
Other versions
WO2000028138A3 (fr
Inventor
Viktor Mikhailovich Drobosyuk
Original Assignee
Procter & Gamble Company
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 Procter & Gamble Company filed Critical Procter & Gamble Company
Priority to AU12209/00A priority Critical patent/AU1220900A/en
Priority to EP99971877A priority patent/EP1181410A2/fr
Priority to JP2000581297A priority patent/JP2002529620A/ja
Priority to CA002349294A priority patent/CA2349294A1/fr
Publication of WO2000028138A2 publication Critical patent/WO2000028138A2/fr
Publication of WO2000028138A3 publication Critical patent/WO2000028138A3/fr

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F9/00—Complete machines for making continuous webs of paper

Definitions

  • the present invention relates to devices for making various types of paper from fibrous materials by an aerodynamic method, and, more particularly, to a device useable in the papermaking industry for feeding a flow of fibrous aerosuspension onto a forming wire.
  • the aerodynamic method of papermaking can be schematically divided into the following major stages: grinding the fibrous material, its dispersing (i.e., separating the ground material into separate fibers and forming an aerosuspension of the fibers), forming a layer of fibers on a forming wire, pressing, and drying.
  • grinding the fibrous material i.e., its dispersing (i.e., separating the ground material into separate fibers and forming an aerosuspension of the fibers)
  • forming a layer of fibers on a forming wire pressing, and drying.
  • several devices i. e., dispersers
  • for separating fibrous material into separate fibers are used for feeding flows of aerosuspension to an apparatus that forms a single flow of aerosuspension with a uniform distribution of
  • One such device comprises a chamber with a perforated bottom that houses a rotor with a shell and brushes.
  • the chamber features inlet and outlet connections, and includes a concentrator mounted on the inlet connection. See, for example, USSR Author's Certificate No. 1110845, 3 D 21 H 5/26, published 08/30/84, Information Bulletin No. 32.
  • the body of the concentrator is radially bent in the feeding direction from the feeding side and is equipped with a waste-collecting bunker mounted on its larger radius wall; the above body also features a partition dividing it into two sections used for transporting a flow of fibers and removing the air, said partition being erected on the side of fibers output.
  • the air-removing section is equipped with a number of separating blades.
  • the concentrator features an additional section mounted on the side from which the fibrous aerosuspension is fed and equipped with a turning baffle.
  • the concentrator When the aerosuspension flow enters the concentrator, the latter removes large particles into a waste collector and separates the aerosuspension flow into a concentrated fiber flow and an airflow. The air is removed and the aerosuspension flow is fed to the rotor with brushes. An additional destruction of fiber flakes occurs, when the brushes interact with the perforated bottom. The separated fibers pass through perforations in the bottom and are deposited on the forming wire.
  • the dispersing body represented by the rotor with brushes is located directly next to the forming wire, the structural uniformity of produced paper web is disturbed because the amount of fibrous aerosuspension passing through the openings in the chamber bottom in a unit of time cannot be accurately controlled.
  • This device is also unable to produce a uniform aerosuspension flow for making a wide paper web at an increased rate of aerodynamic forming process in general, i.e., to converge flows from several dispersers into a single aerosuspension flow with a uniform distribution of fibers across the width of the formed web.
  • Another device for dry web forming comprises a cylindrical fiber feeding pipe with a longitudinal slot used for feeding dispersed fibers onto a continuous forming wire. See, for example, USSR Author's Certificate No. 1154400, 4 D 21 H 5/26, published 05/07/85, Information Bulletin No.17.
  • the slotted section of pipe is tapered in the direction of wire motion.
  • the pipe is set at an angle less than 90° relative to the wire axis, and its inclination angle is adjustable.
  • the pipe is equipped with a means for uniform distribution of fibers across the wire width that is in the form of a set of slotted rings mounted along the pipe, with each ring featuring a catch. Suction boxes are placed beneath the wire to provide a controlled vacuum generation.
  • a uniform deposition of fibers across the wire width requires deposition of the same number of fibers per unit of pipe length onto the wire at the beginning and the end of the slot. This condition is provided by the pipe tapering.
  • the adjusting rings controlling the degree of opening of the slot at any spot along the pipe length are used for fine adjustment of the flow.
  • the described device is simple in design, though a lot of labor is consumed in adjusting the device to different forming rates in each specific case. Moreover, the device is unable to provide a uniform flow of fibers from several dispersers.
  • This device comprises a cylindrical body, a rotor, and a stator designed as concentric nested pipes with disk-carrying partitions.
  • the partitions and disks form ring-shaped channels extending along the body axis, through which a fibrous aerosuspension from individual dispersers is fed.
  • Coaxial slotted rings are fixed on both sides of the disks.
  • the rotor comprises two support disks resting on the outer pipe of the stator with their bearings.
  • the support disks are interconnected with blades fixed along their periphery, thus forming a fan.
  • the fan blades feature rotor disks attached to them.
  • the disks carry concentric slotted rings on both of their sides.
  • the concentric rings of the rotor are coaxial with the concentric rings of the stator.
  • a sieve is mounted around the rotor at a certain distance therefrom.
  • the device is equipped with connectors for feeding and removing the fibrous aerosuspension.
  • the device combines a dispersion function and generation of an aerosuspension flow with uniform distribution of fibers across the width of the formed web. Aerosuspension flows from individual dispersers are fed through the channels into the rotor. The flow driven by the rotor blades collides with the rotating rings of the rotor and stationary rings of the stator in an alternating manner, which determines the process of dispersion.
  • the fully dispersed fibers are fed through the sieve inside the device where they pass through an opening in the bottom section of the body onto the forming wire of a paper-making machine.
  • Such a design provides for a uniform deposition of fibers across the wire width and thus allows one to manufacture paper-making equipment having practically any acceptable width required for papermaking.
  • combining the functions of dispersion and distribution of fibrous aerosuspension across the width of the forming wire decreases the structural uniformity of the formed web and makes the design of the whole device much more complex.
  • the presence of a sieve causes a substantial drop in the device's production capacity.
  • the present invention provides a device that can enhance the structural uniformity of the formed paper web, while being structurally simple.
  • a device for feeding fibrous aerosuspension flow onto a forming wire of a paper-making machine comprises a cylindrical body that includes a plurality of input channels for directing the aerosuspension flow out of the cylindrical body.
  • a rotor having an external surface and an axial length is mounted within the cylindrical body.
  • a plurality of rotor blades, each having an axial dimension, are attached to the rotor in a radial disposition.
  • the input and output channels are located on the exterior of the cylindrical body and tangentially oriented with respect to the direction of rotation of the rotor.
  • the input channels can be constructed in the form of diffusing-converging passages, that diffuse in the axial direction and converge in the radial direction, relative to the cylindrical body.
  • Each diffusing-converging passage has a diffusion portion oriented in an axial direction relative to the cylindrical body and a converging portion oriented in a radial direction relative to the cylindrical body.
  • the aerosuspension flow can be substantially distributed in the axial direction prior to entering the cylindrical body.
  • the output channel can feature a bend at the outlet of the cylindrical body.
  • the bend functions to turn the output channel around in a direction opposite to the rotation of the rotor.
  • the rotor blades can be made such that their dimension along the axial direction does not exceed half (1/2) of the rotor's length.
  • the blades are placed on the rotor surface preferably in alternating order to improve agitation of the aerosuspension.
  • the location of the input channels and the output channel on the exterior of the body and tangential to the direction of the rotation of the rotor provides for a free feed of aerosuspension flows from several dispersers into an active agitation zone generated in the cylindrical body by the rotation of the rotor.
  • the diffusing-converging shape of the input channels provides for an additional axial re-distribution of the aerosuspension flows entering the cylindrical body, thus accelerating the mixing process.
  • fiber clusters from the aerosuspension flow are prevented from reaching the output channel and being deposited onto the forming wire. Specifically, the clusters are carried by re-circulating the flow of aerosuspension and mixed once again by the rotor.
  • the aerosuspension flow fed from the output channel onto the forming wire features a uniform distribution of fibers across the width of the web being formed.
  • FIG. 1 is a perspective view of a device for feeding fibrous aerosuspension according to an embodiment of the present invention.
  • Fig. 2 is a perspective view of the device for feeding fibrous aerosuspension according to another embodiment of the invention.
  • Fig. 3 is a perspective view of an embodiment of a rotor for use with the device for feeding fibrous aerosuspension.
  • the device of the present invention comprises a cylindrical body 1 , input channels 2 extending tangentially in a direction of rotation of a rotor 3 having carrying blades 4 on its external surface, and an output channel 5.
  • the rotor 3 has an axial length measured in a direction parallel to the rotor's axis of rotation.
  • Each of the blades 5 has an axial dimension parallel to the axial length of the rotor 5.
  • the axial dimension of the blades 5 is not greater than half of the rotor's axial length.
  • the input channels 2 can be shaped as diffusing- converging passages. Additionally, as illustrated in Fig.
  • the output channel 5 can be turned around in the direction opposite to the direction of rotation of the rotor 3 by means. of a bend 6 at the outlet of the cylindrical body 1.
  • the output channel 5 can be oriented in the same direction as the rotation of the rotor 3, as illustrated in Fig. 1. Operation of the device will now be described with reference to Figs. 1-3.
  • Fans (not shown) feed aerosuspension flows from dispersers (not shown) into input channels 2 of the device. If the input channels 2 are shaped as diffusing-converging passages, as shown in Fig. 2, the aerosuspension flows being fed converge in the direction radial to the cylindrical body 1 , while expanding in its axial direction. As a result of such re-distribution, the aerosuspension flow is substantially distributed in the axial direction, and fed into the space between the body 1 and the rotor 3.
  • the aerosuspension flow travels within the cylindrical body 1 , it reaches an active agitation zone generated by the blades 4 disposed on the rotor 3. (See Fig. 3).
  • the blades 4 draw a part of the entire flow into a rotating (or circulating) flow around the rotor 3.
  • a static pressure drop created by the blades 4 generates additional circulating flows represented by inter-blade vortexes that intensify agitation of air-suspended fibers.
  • the output channel 5 features a bend 6, as illustrated in Fig. 2, then a turn of aerosuspension flow in the bend 6 caused by a centrifugal force prevents possible clusters of fibers from entering the output channel 5.
  • the clusters are carried away by the circulating flow, disintegrated by the blades 4 of the rotor 3 and are mixed again.

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  • Paper (AREA)

Abstract

L'invention concerne un dispositif conçu pour l'alimentation d'un flux de matériaux fibreux en suspension sur une toile de formation. Le dispositif comporte un corps cylindrique, plusieurs canaux d'entrée et un canal de sortie. Le flux en suspension pénètre le dispositif par les canaux d'entrée à partir de divers disperseurs. Un rotor brasse le flux en suspension pour que le canal de sortie distribue un flux de fibres en suspension uniformément sur toute la largeur de la toile de formation.
PCT/US1999/024743 1998-11-10 1999-10-25 Dispositif pour l'alimentation d'un flux de materiaux fibreux en suspension sur une toile de formation d'une machine a fabriquer le papier WO2000028138A2 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AU12209/00A AU1220900A (en) 1998-11-10 1999-10-25 A device for feeding fibrous aerosuspension onto forming wire of paper-making machine
EP99971877A EP1181410A2 (fr) 1998-11-10 1999-10-25 Dispositif pour l'alimentation d'un flux de materiaux fibreux en suspension sur une toile de formation d'une machine a fabriquer le papier
JP2000581297A JP2002529620A (ja) 1998-11-10 1999-10-25 製紙機の成形ワイヤ上に繊維懸濁液を供給するための装置
CA002349294A CA2349294A1 (fr) 1998-11-10 1999-10-25 Dispositif pour l'alimentation d'un flux de materiaux fibreux en suspension sur une toile de formation d'une machine a fabriquer le papier

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
RU98120376/12A RU2160804C2 (ru) 1998-11-10 1998-11-10 Устройство для подачи аэровзвеси волокон на формующую сетку бумагоделательной машины
RU98120376 1998-11-10

Publications (2)

Publication Number Publication Date
WO2000028138A2 true WO2000028138A2 (fr) 2000-05-18
WO2000028138A3 WO2000028138A3 (fr) 2001-11-08

Family

ID=20212195

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1999/024743 WO2000028138A2 (fr) 1998-11-10 1999-10-25 Dispositif pour l'alimentation d'un flux de materiaux fibreux en suspension sur une toile de formation d'une machine a fabriquer le papier

Country Status (8)

Country Link
EP (1) EP1181410A2 (fr)
JP (1) JP2002529620A (fr)
CN (1) CN1165657C (fr)
AU (1) AU1220900A (fr)
CA (1) CA2349294A1 (fr)
RU (1) RU2160804C2 (fr)
TW (1) TW579403B (fr)
WO (1) WO2000028138A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8545675B2 (en) 2010-06-09 2013-10-01 The Procter & Gamble Company Apparatus for separating particles and methods for using same

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109183489A (zh) * 2018-09-25 2019-01-11 福建锐信合成革有限公司 一种离型纸上浆装置
RU203082U1 (ru) * 2020-11-16 2021-03-22 Федеральное государственное бюджетное образовательное учреждение высшего образования Санкт-Петербургский государственный университет промышленных технологий и дизайна Устройство для преобразования потока аэровзвеси волокон при производстве бумаги и картона
CN115091585B (zh) * 2022-06-06 2023-10-27 中国建筑第七工程局有限公司 一种纤维定向导向装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3863295A (en) * 1971-10-01 1975-02-04 Cast Fabrics Inc Apparatus for producing cast fabrics
SU746007A1 (ru) * 1978-04-03 1980-07-07 Центральный Научно-Исследовательский И Проектно-Конструкторский Институт По Проектированию Оборудования Для Целлюлозно-Бумажной Промышленности Устройство дл роспуска волокнистого материала
US4176427A (en) * 1978-08-02 1979-12-04 Scott Paper Company Web forming apparatus employing spreading section
US4375448A (en) * 1979-12-21 1983-03-01 Kimberly-Clark Corporation Method of forming a web of air-laid dry fibers
US4389175A (en) * 1981-05-15 1983-06-21 James River-Dixie/Northern, Inc. Apparatus for distributing dry fibers onto a forming wire
US4767586A (en) * 1986-01-13 1988-08-30 Kimberly-Clark Corporation Apparatus and method for forming a multicomponent integral laid fibrous web with discrete homogeneous compositional zones, and fibrous web produced thereby

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8545675B2 (en) 2010-06-09 2013-10-01 The Procter & Gamble Company Apparatus for separating particles and methods for using same
US9623445B2 (en) 2010-06-09 2017-04-18 The Procter & Gamble Company Apparatus for separating particles and methods for using same

Also Published As

Publication number Publication date
CA2349294A1 (fr) 2000-05-18
RU2160804C2 (ru) 2000-12-20
AU1220900A (en) 2000-05-29
TW579403B (en) 2004-03-11
JP2002529620A (ja) 2002-09-10
CN1332820A (zh) 2002-01-23
EP1181410A2 (fr) 2002-02-27
WO2000028138A3 (fr) 2001-11-08
CN1165657C (zh) 2004-09-08

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