WO2006091063A1 - Secteur de raffinage et procede de fabrication - Google Patents

Secteur de raffinage et procede de fabrication Download PDF

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Publication number
WO2006091063A1
WO2006091063A1 PCT/MX2006/000001 MX2006000001W WO2006091063A1 WO 2006091063 A1 WO2006091063 A1 WO 2006091063A1 MX 2006000001 W MX2006000001 W MX 2006000001W WO 2006091063 A1 WO2006091063 A1 WO 2006091063A1
Authority
WO
WIPO (PCT)
Prior art keywords
refining
sector
bars
adjacent
grooves
Prior art date
Application number
PCT/MX2006/000001
Other languages
English (en)
Spanish (es)
Inventor
Julio Antonio TREVIÑO MORALES
Original Assignee
Trevino Morales Julio Antonio
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 Trevino Morales Julio Antonio filed Critical Trevino Morales Julio Antonio
Publication of WO2006091063A1 publication Critical patent/WO2006091063A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C7/00—Crushing or disintegrating by disc mills
    • B02C7/11—Details
    • B02C7/12—Shape or construction of discs
    • 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
    • D21D1/30—Disc mills
    • D21D1/306—Discs

Definitions

  • This invention relates to refining sectors intended to be used in refining discs of refining machines to refine lignocellulosic fibrous materials and other natural or synthetic materials.
  • the invention relates more precisely to a refining sector and a manufacturing method thereof.
  • a refining machine of lignocellulosic fibrous material and other natural or synthetic materials consists of two opposite refining discs that rotate with respect to each other, of which one or both are rotating.
  • the refining discs a plurality of refining sectors are disposed that have a surface with a design of intermediate bars and grooves.
  • the refining discs are positioned so that the refining sectors form a refining gap, through which the fibrous material is destined to pass out from within the refining discs, whereby the disintegration of the fiber is carried carried out by the bars of the refining sectors.
  • Said bars can be of various designs and, therefore, can be continuous or discontinuous and are of uniform or variable height. In most cases, toothed bars can be used.
  • the fibrous material is first defibrated in the refining gap between the refining surfaces, that is, the fibers are released, which takes place in the inner portion of the refining gap in which the distance between the surfaces of Refining is the greatest of all.
  • the refining gap narrows outwardly so that the desired refining of the fibrous material is obtained. To produce this refining, large amounts of energy are required.
  • the refining surfaces are formed in different ways, which depend on the degree of refining desired and therefore on the quality of the desired paste. Paste quality is also affected by other factors, for example refining gap size, liquid content in the fibrous material, feed rate, temperature, and so on.
  • the appearance of the refining surfaces is of great importance, especially in relation to the length of the fiber of the refined material.
  • a substantially radial orientation of the bars on the refining surfaces a large proportion of long and well defibrated fibers is obtained in the paste.
  • the fibrous material orients itself in the refining interstitium with the fiber direction essentially parallel to the edges of the bar.
  • defibration and refining take place because the fibrous material rolls substantially between the bars on opposite refining surfaces, so that the fibers are released and defibrillated along their entire length.
  • This type of pulp is highly resistant and is therefore particularly used, for example for printing paper.
  • the energy consumption in the manufacture of this type of pasta is relatively high.
  • the angle of inclination of the bar is also important for feeding the material through the refining gap.
  • the bars have an oblique inclination angle and outwardly backward in the direction of disc rotation, a pumping action is obtained outwards, while at a tilt angle in the opposite direction it produces a braking effect.
  • the time of stay of the material in the refining gap is affected by the angle of inclination of the bars and their location either for pumping or refining.
  • the refining sector is formed by two or more adjacent refining sections in radial direction to perform one or more refining work steps, such that each of the refining sections is formed by one or more refining portions that include a plurality of bars and grooves; and one or more removal channels between adjacent refining sections.
  • the object of the invention to offer a changeable refining section model to form a refractory cast mold of a refining sector for refining disc, the refining section model is formed by one or several groups of bars and grooves; and one or more channels between the groups of bars and adjacent grooves.
  • Another object of the invention is to offer a method for manufacturing refining sectors for refining disc, the method starts by determining one or more refining work steps to be performed by the refining sector; continuing with the selection of one or more models of changeable refining sections to form a refractory cast mold of the refining sector with the models of changeable refining sections selected; and thus make the casting part of the refining sector from the refractory mold.
  • a refining disc for a refining machine of fibrous material is also object of the invention, the refining disc is formed by two or more generally circular refining crowns for one or more refining work stages, where each of the crowns refining include one or more refining portions, characterized by including a plurality of bars and grooves; and one or more removal channels between adjacent refining crowns.
  • Figure 1 illustrates a schematic view of a refining sector according to the invention.
  • Figures 2A, 2B and 2C illustrate the models of refining sections for manufacturing a refining sector.
  • Figure 2A is a top view of models of changeable refining sections;
  • Figure 2B is a side sectional view of the models of refining sections and a molding plate and
  • Figure 2C is a top view of the molding plate with the models of refining sections and the rear model.
  • Figures 3A and 3B illustrates two cooperating refining discs in a refining machine according to the invention.
  • FIG. 1 shows a schematic view of a refining sector according to the invention.
  • the refining sector 10 for use in a refining disc of a refining machine of fibrous material, is formed by two or more refining sections.
  • Figure 1 shows two refining sections 20 and 30 adjacent in radial direction and separated from each other by a removal channel 40.
  • each of the refining sections 20 and 30 are divided into one or more portions of refining 50, such that the adjacent refining portions 50 within the same refining section 20 or 30 are separated by distribution channels 60.
  • Each of the refining portions 50 within the same refining section 20 or 30 is formed by a plurality of rods 70 and grooves 80 whose width, depth and angle of inclination is substantially the same.
  • the refining sector 10 being formed by two or more refining sections 20 and 30 has at least a double action or refining work stage to be performed during the refining process of the fibrous material. Therefore, the depth and angle of inclination of the bars 70 and grooves 80 of adjacent refining portions 50 in radial direction between the refining sections 20 and 30, are generally the same; while the width of the bars 70 and grooves 80 must not necessarily be the same.
  • the refining sector 10 can have a refining section 20 whose bars 70 and grooves 80 can have a width equal to or different from the width of the bars 70 and grooves 80 of the other refining section 30, this with the purpose of refining sections 20 and 30 performing a different refining work stage in the fibrous material within the refining process.
  • the width of the bars 70 and grooves 80 of the refining section 20 is greater than the width of the bars 70 and grooves 80 of the refining section 30, the refining section 20 performs the work of cutting and a first job of defibration of the fibrous material; while the refining section 30 performs the final defibration work and decreases the cutting effect.
  • the refining sector 10 may have a first refining section 20 to perform a cutting stage combined with a second refining section 30 to simultaneously perform a defibration stage; or a refining sector 10 having a first refining section 20 to perform a cutting and defibration stage combined with a second refining section 30 to perform a second finer defibration stage; or a refining sector 10 that has a first refining section 20 to perform the cutting stage combined with a second refining section 30 to perform a first defibration stage combined with a third refining section (not shown) that performs a second stage of final defibration.
  • the ascending entrances 90 of each of the bars 70 of the refining section 20 allow the pulp of incoming fibrous material, which comes from the center of the refining machine (not shown), to be distributed among all the refining portions 50; while the distribution channels 60 are redistributing the pulp of fibrous material between the bars 70 and grooves 80 of each refining portions 50 as the pulp flows out of the refining section 20.
  • the removal channel 40 optimizes the removal of the paste by allowing the pulp of fibrous material to be removed that could not be removed within a refining work stage carried out in a previous refining section, so that this paste is used in the next stage of refining work to be carried out by the next refining section and so on as the paste advances between the refining sections.
  • This removal channel 40 in conjunction with the distribution channels 60 of the following refining section allow the pulp of fibrous material, which comes from the previous refining section, to be distributed between the refining portions 50 and between its bars 70 and grooves 80 for a next stage of refining work as the paste flows out of the next refining section.
  • the refining sector 10 can be made in a single casting or by separate castings, which could be the refining sections 20 and 30, which are placed adjacently to form said sector.
  • the refining sector 10 also has fastening means such as through holes 100 to be arranged and distributed in the refining sections 20 and 30, such that the refining sector 10 can be attached to the refining disc.
  • Figure 2A illustrates models of changeable refining sections 120 and 130 to form a refractory cast mold of a refining sector.
  • Each refining section model is formed by one or several groups of bars and grooves 150 and one or more channels 160 between the groups of bars and adjacent grooves, which allow forming the mold for the bars 70 and grooves 80 and the mold of the distribution channels 60 of a refining sector respectively.
  • the refining work steps to be carried out by the refining sector are determined by selecting two or more models of refining sections 120 and 130 separately and combined adjacently. in the radial direction, they can form a cast mold for a refining sector that complies with such refining work steps.
  • These models of refining sections 120 and 130 are changeable on a molding plate 110, that is to say that they can be removed and changed by other models of refining sections in order to form as many foundry molds as are necessary to make both refining sectors that perform two or more stages of refining work according to refining requirements of the fibrous material required for an application.
  • a subsequent model 140 of the refining section to be manufactured is mounted and secured.
  • the mold is formed refractory of casting with refractory sand to later make the casting part of the refining sector by emptying the molten metal in the mentioned mold and finally removing the piece of solidified refining sector to proceed to its subsequent rectification process.
  • This manufacturing method that allows to have models of changeable refining sections allows to form a plurality of molds of refining sectors to manufacture a plurality of refining sectors 10 that cover multiple requirements within the industry, since it allows to combine two or more section models of refining of the same or different angle of inclination and width of the bars and grooves to form a mold of refining sector to manufacture a refining sector 10 that performs two or more stages of refining work.
  • the manufacturing method represents an advantage over the current manufacturing methods of refining sectors belonging to the state of the technique, since to form forty-five different refining sectors would require forty-five models of different refining sectors with current methods; but when using the manufacturing method of the invention, which is based on molds of changeable refining sections, only ten separate refining model models are required.
  • FIGS 3A and 3B illustrate two cooperating refining discs in a refining machine.
  • Each disk is formed by a series of refining sectors 10 such that the refining sections 20 and 30 together form at least two refining crowns, generally circular in shape, which are adjacent to each other in radial direction.
  • the refining disc it has a radial removal channel 40 between the refining crowns and a plurality of distribution channels 60.
  • Each circular refining crown is formed by a plurality of refining portions 50 that can be separated with each other through the distribution channels 60 and such that each refining portion 50 has a plurality of bars 70 and grooves 80. In the first circular refining crown, the bars 70 begin with an ascending end or inlet 90 in a triangular shape.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Paper (AREA)

Abstract

L'invention concerne un secteur de raffinage de disque de raffinage d'une machine de raffinage de matériaux fibreux lignocellulosiques et d'autres matériaux naturels ou synthétiques. Le secteur de raffinage est formé de deux ou de plusieurs sections de raffinage adjacentes dans une direction radiale associées à une ou plusieurs étapes de raffinage, chacune des sections de raffinage contenant une ou plusieurs parties de raffinage se caractérisant en ce qu'elles contiennent une pluralité de barres et de cannelures, et d'un ou de plusieurs conduits d'élimination entre lesdites sections de raffinage adjacentes. En variante, le secteur de raffinage comprend une pluralité de conduits de distribution de la pâte entre les parties de raffinage, les barres et les cannelures. L'invention concerne également le disque de raffinage formé par la pluralité de secteurs de raffinage de l'invention, ainsi qu'un procédé de fabrication de secteurs de raffinage basé sur des modèles de sections de raffinages changeables.
PCT/MX2006/000001 2005-02-22 2006-01-05 Secteur de raffinage et procede de fabrication WO2006091063A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
MXNL/A/2005/000017 2005-02-22
MXNL05000017 MXNL05000017A (es) 2005-02-22 2005-02-22 Sector de refino y metodo de fabricacion.

Publications (1)

Publication Number Publication Date
WO2006091063A1 true WO2006091063A1 (fr) 2006-08-31

Family

ID=36643815

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/MX2006/000001 WO2006091063A1 (fr) 2005-02-22 2006-01-05 Secteur de raffinage et procede de fabrication

Country Status (2)

Country Link
MX (1) MXNL05000017A (fr)
WO (1) WO2006091063A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2533910C2 (ru) * 2013-03-22 2014-11-27 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Воронежский государственный аграрный университет имени императора Петра 1" (ФГБОУ ВПО Воронежский ГАУ) Дисковая мельница для измельчения зерна

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3910511A (en) * 1974-05-20 1975-10-07 Westvaco Corp Open discharge pulp refiner
WO1992011941A1 (fr) * 1991-01-08 1992-07-23 Sunds Defibrator Industries Aktiebolag Element d'affinage et procede de fabrication de cet element
ES2121997T3 (es) * 1992-04-08 1998-12-16 Sunds Defibrator Ind Ab Elemento refinador.
US5893525A (en) * 1997-07-01 1999-04-13 Durametal Corporation Refiner plate with variable pitch
ES2140693T3 (es) * 1994-08-18 2000-03-01 Sunds Defibrator Ind Ab Elementos de refino.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3910511A (en) * 1974-05-20 1975-10-07 Westvaco Corp Open discharge pulp refiner
WO1992011941A1 (fr) * 1991-01-08 1992-07-23 Sunds Defibrator Industries Aktiebolag Element d'affinage et procede de fabrication de cet element
ES2121997T3 (es) * 1992-04-08 1998-12-16 Sunds Defibrator Ind Ab Elemento refinador.
ES2140693T3 (es) * 1994-08-18 2000-03-01 Sunds Defibrator Ind Ab Elementos de refino.
US5893525A (en) * 1997-07-01 1999-04-13 Durametal Corporation Refiner plate with variable pitch

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2533910C2 (ru) * 2013-03-22 2014-11-27 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Воронежский государственный аграрный университет имени императора Петра 1" (ФГБОУ ВПО Воронежский ГАУ) Дисковая мельница для измельчения зерна

Also Published As

Publication number Publication date
MXNL05000017A (es) 2006-03-23

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