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DE10100904A1 - Fine mesh sieve, for pressure sorting in the paper industry, is tensed between flanges which also carry a supporting coarse mesh wire sieve on a diagonal, to support the fine mesh against alternating underpressure/overpressure forces - Google Patents

Fine mesh sieve, for pressure sorting in the paper industry, is tensed between flanges which also carry a supporting coarse mesh wire sieve on a diagonal, to support the fine mesh against alternating underpressure/overpressure forces

Info

Publication number
DE10100904A1
DE10100904A1 DE2001100904 DE10100904A DE10100904A1 DE 10100904 A1 DE10100904 A1 DE 10100904A1 DE 2001100904 DE2001100904 DE 2001100904 DE 10100904 A DE10100904 A DE 10100904A DE 10100904 A1 DE10100904 A1 DE 10100904A1
Authority
DE
Germany
Prior art keywords
sieve
flanges
fine
fine mesh
support
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.)
Withdrawn
Application number
DE2001100904
Other languages
German (de)
Inventor
Dietrich Eichler
Frank Eichler
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.)
Fan Separator GmbH
Original Assignee
Fan Separator GmbH
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 Fan Separator GmbH filed Critical Fan Separator GmbH
Priority to DE2001100904 priority Critical patent/DE10100904A1/en
Publication of DE10100904A1 publication Critical patent/DE10100904A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07BSEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/48Stretching devices for screens
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D29/00Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/01Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
    • B01D29/05Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements supported
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07BSEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/18Drum screens
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21DTREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D5/00Purification of the pulp suspension by mechanical means; Apparatus therefor
    • D21D5/02Straining or screening the pulp
    • D21D5/16Cylinders and plates for screens

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combined Means For Separation Of Solids (AREA)

Abstract

The assembly to stretch and support a fine woven mesh sieve (3), against the oscillation pressures of underpressure and overpressure, has a supporting wire sieve (4) between two flanges (1,2) and on a diagonal to them. The wires of the fine sieve are secured to the flanges in an axial and radial alignment. The flanges are held together by screwed supports. The stretch and support system, for a fine sieve, has two flanges of different diameters.

Description

Anwendungsgebietfield of use

Bei der Aufbereitung von Produktionswässern, insbesondere zur Rückführung in den verfahrenstechnischen Kreislauf, werden immer höhere Anforderungen an den Grad der Abscheidung von Feststoffen gestellt, die mit einfachen Maschinen erreicht werden sollen.In the treatment of production water, especially for the return to the procedural cycle, increasingly high demands on the degree the separation of solids, which is achieved with simple machines should be.

Eine solche Technik stellt die Filtration von Flüssigkeiten über Feinsiebe dar, in denen Siebgewebe unter 100 µm zur Anwendung kommen und deren Arbeitsweise kontinuierlich ist.One such technique is the filtration of liquids through fine screens, in which screen fabrics under 100 µm are used and their mode of operation is continuous.

Eine entscheidende Rolle spielt das angewendete Prinzip der Reinigung solch feiner Siebe.The principle of cleaning used plays a crucial role fine sieves.

Charakterisierung der bekannten technischen LösungenCharacterization of the known technical solutions

Besonders in der Papierindustrie haben sich Druckfilter und Drucksortierer durchgesetzt, bei denen durch einen Rotor über einem fest eingespannten zylindrischen Sieb ein ständig wechselnder, also oszillierender Überdruck und Unterdruck, aufgebaut wird.Pressure filters and pressure sorters are particularly popular in the paper industry enforced, in which fixed by a rotor over a cylindrical screen is a constantly changing, i.e. oscillating overpressure and Vacuum, is built up.

An den Armen des Rotors sind dazu im Querschnitt dem Tragflügel ähnliche Elemente angeordnet, die im Umfang rotierend dicht über dem Sieb geführt werden.On the arms of the rotor, the wing is similar in cross section Arranged elements that are rotated circumferentially close to the sieve.

Während der Überdruck, unterstützt durch den Druck der Zulaufpumpe, die Flüssigkeit durch das Sieb treibt, werden durch den oszillierenden Unterdruck anhaftende Feststoffteilchen vom Sieb abgehoben und durch die Strömung, deren Intensität reguliert werden kann, weiter transportiert.During the overpressure, supported by the pressure of the feed pump, the Drifting liquid through the sieve are caused by the oscillating negative pressure adhering solid particles are lifted from the sieve and by the flow of which Intensity can be regulated, transported further.

Dieser Unterdruck ist damit entscheidend für die kontinuierliche Reinigung des Siebes verantwortlich.This negative pressure is therefore crucial for the continuous cleaning of the Siebes responsible.

Eine andere Lösung der kontinuierlichen Reinigung von Feinfiltern wird in der deutschen Patentanmeldung 100 47 431.4 "Druckfilter mit Vibrationsantrieb" dargestellt.Another solution for the continuous cleaning of fine filters is in the German patent application 100 47 431.4 "pressure filter with vibration drive" shown.

In dieser Vorrichtung werden der Überdruck und der Unterdruck durch einen zylindrischen Vibrator erzeugt, der kreisförmige horizontale Schwingungen erzeugt. Auch hier ist das zylindrische Sieb fest in das Gehäuse eingespannt. In this device, the overpressure and the vacuum are controlled by a cylindrical vibrator that creates circular horizontal vibrations. Here, too, the cylindrical sieve is firmly clamped in the housing.  

Bei den Sieben wird zwischen Lochsieben und Stabsieben unterschieden. Die Stabsiebe sind durch die Stabform sehr stabil und lassen sich von dem wirkenden Überdruck und dem Unterdruck kaum verformen. Der Nachteil der Stabsiebe ist die geringe freie Filterfläche.A distinction is made between perforated sieves and rod sieves. The bar sieves are very stable due to the bar shape and can be from the hardly deform the acting overpressure and the negative pressure. The disadvantage of Bar screens is the small free filter area.

Stabile Lochsiebe sind aus elektronenstrahlgebohrten Blechen hergestellt und besitzen ebenfalls nur eine geringe offenen Siebfläche.Stable perforated screens are made from sheet metal drilled with electron beams also have only a small open screen area.

Dagegen besitzen aus feinen Drähten gewebte Siebe eine große offene Siebfläche und sind kostengünstig.In contrast, sieves woven from fine wires have a large open sieve area and are inexpensive.

Der Nachteil bei diesen Siebgeweben ist aber, daß sie keine ausreichende Festigkeit besitzen und so zwischen außen- und innenliegenden dickeren, grobmaschigen Stützgeweben fest eingespannt werden müssen.The disadvantage of these screen fabrics is that they are not sufficient Have strength and thus between the outside and inside thicker, coarse-mesh support fabrics must be firmly clamped.

Die Anordnung eines mechanischen Abstreifers, wie er in einigen Anwendungen erforderlich ist, ist damit nicht möglich, da das innere Stützgewebe ein Reinigen des Feinsiebes nicht zuläßt.The arrangement of a mechanical scraper as used in some applications is necessary is not possible because the inner support fabric cleaning the Fine sieve does not allow.

Merkmale der ErfindungFeatures of the invention

Der Erfindung liegt die Aufgabe zu Grunde eine Vorrichtung vorzustellen, in der Feingewebe in einem Sieb so eingespannt und gestützt wird, daß es mit dem erforderlichen Überdruck und Unterdruck belastet werden kann und dabei seine Spannung vor allem beim oszillierenden Unterdruck nicht nachgibt und außerdem die Innenfläche des Feinsiebes nicht durch ein davorliegendes Stützsieb verdeckt wird.The invention is based on the object of presenting a device in which Fine tissue is clamped and supported in a sieve in such a way that it matches the required overpressure and underpressure can be loaded and its Tension does not give in, especially with oscillating negative pressure, and also the inner surface of the fine sieve is not covered by a supporting sieve in front of it becomes.

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß zwischen zwei Flanschen ein mit einer großen Maschenweite und dickeren Drähten bestehendes Stützsieb diagonal zu den Flanschen an diesen befestigt wird.According to the invention this object is achieved in that between two flanges a support sieve with a large mesh size and thicker wires attached diagonally to the flanges.

Die Drähte des innenliegenden Feinsiebes verlaufen dagegen achsial beziehungsweise radial zu den Flanschen und sind ebenfalls an diesen festgemacht.In contrast, the wires of the internal fine sieve run axially or radial to the flanges and are also on these fixed.

Die Flansche werden durch einschraubare Stützen miteinander verspannt. Durch die bei der Verspannung nach innen wirkende radiale Verengung des diagonal angeordneten Stützsiebes wird das Feinsieb so gehalten, daß auch beim oszillierenden Unterdruck eine ausreichende Abstützung vorhanden ist.The flanges are clamped together by screw-in supports. Through the radial constriction of the diagonal when braced arranged support sieve, the fine sieve is held so that the oscillating vacuum there is sufficient support.

Die zylindrische Innenfläche des Feinsiebes bleibt frei und kann dadurch gegebenenfalls von einem mechanischen Abstreifer ergänzend gereinigt werden.The cylindrical inner surface of the fine screen remains free and can optionally cleaned by a mechanical scraper.

Das Prinzip der Verspannung und Abstützung des Feinsiebes läßt sich auch bei Sieben realisieren, bei denen der Durchmesser des eines Flansches einen anderen Durchmesser aufweist als der des anderen Flansches. The principle of bracing and supporting the fine screen can also be used Realize seven where the diameter of one flange is another Has diameter than that of the other flange.  

Ausführungsbeispielembodiment

Die Erfindung wird nachfolgend anhand der Fig. 1 und 2 näher erläutert.The invention is explained in more detail below with reference to FIGS. 1 and 2.

Fig. 1 zeigt in aufgeklappter Ansicht die Vorrichtung, wobei der obere Flansch (1) und der untere Flansch (2) mit dem Feinsieb (3) und dem diagonalen Stützsieb (4) feste verbunden ist. Fig. 1 shows the device in an unfolded view, the upper flange ( 1 ) and the lower flange ( 2 ) with the fine sieve ( 3 ) and the diagonal support sieve ( 4 ) is fixedly connected.

Fig. 2 zeigt einen Längsschnitt durch das Sieb und wiederum den oberen Flansch (1) und den unteren Flansch (2) mit dem Feinsieb (3), welches in diesem Schnitt das diagonale Stützsieb (4) der Figur (1) verdeckt. Fig. 2 shows a longitudinal section through the sieve and again the upper flange ( 1 ) and the lower flange ( 2 ) with the fine sieve ( 3 ), which in this section covers the diagonal support sieve ( 4 ) of Figure (1).

Zwischen den beiden Flanschen sind auf beiden Seiten die Stützen (5) dargestellt, mit denen mit Hilfe der Schrauben (6) das Sieb gespannt wird.Between the two flanges, the supports ( 5 ) are shown on both sides, with which the sieve is tightened using the screws ( 6 ).

Durch die bei der Verspannung nach innen wirkende radiale Verengung des diagonal angeordneten Stützsiebes (4) wird das Feinsieb (3) so gehalten, daß auch beim oszillierenden Unterdruck eine ausreichende Abstützung vorhanden ist.Due to the radial constriction of the diagonally arranged support sieve ( 4 ), which acts inward during the bracing, the fine sieve ( 3 ) is held in such a way that there is sufficient support even with the oscillating negative pressure.

Claims (2)

1. Vorrichtung zum Spannen und Abstützen von feinen Siebgeweben in zylindrischen Sieben, die in Feinfiltern zur Anwendung kommen und einem oszillierenden Überdruck und Unterdruck ausgesetzt sind dadurch gekennzeichnet, daß zwischen zwei Flanschen ein mit einer großen Maschenweite und dickeren Drähten bestehendes Stützsieb diagonal zu den Flanschen befestigt wird und bei dem das ebenfalls an den Flanschen befestigte Feinsieb die Drähte achsial beziehungsweise radial angeordnet sind und die Flansche durch einschraubare Stützen miteinander verspannt werden können.1. Device for tensioning and supporting fine screen fabrics in cylindrical screens, which are used in fine filters and are exposed to an oscillating overpressure and vacuum, characterized in that between two flanges an existing with a large mesh size and thicker support screen attached diagonally to the flanges is and in which the fine screen also attached to the flanges, the wires are arranged axially or radially and the flanges can be clamped together by screw-in supports. 2. Vorrichtung nach Anspruch 1 dadurch gekennzeichnet, daß der Durchmesser eines Flansches einen anderen Durchmesser als der des anderen Flansches aufweist.2. Device according to claim 1, characterized in that the diameter one flange has a different diameter than that of the other flange having.
DE2001100904 2001-01-11 2001-01-11 Fine mesh sieve, for pressure sorting in the paper industry, is tensed between flanges which also carry a supporting coarse mesh wire sieve on a diagonal, to support the fine mesh against alternating underpressure/overpressure forces Withdrawn DE10100904A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE2001100904 DE10100904A1 (en) 2001-01-11 2001-01-11 Fine mesh sieve, for pressure sorting in the paper industry, is tensed between flanges which also carry a supporting coarse mesh wire sieve on a diagonal, to support the fine mesh against alternating underpressure/overpressure forces

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2001100904 DE10100904A1 (en) 2001-01-11 2001-01-11 Fine mesh sieve, for pressure sorting in the paper industry, is tensed between flanges which also carry a supporting coarse mesh wire sieve on a diagonal, to support the fine mesh against alternating underpressure/overpressure forces

Publications (1)

Publication Number Publication Date
DE10100904A1 true DE10100904A1 (en) 2002-07-18

Family

ID=7670189

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2001100904 Withdrawn DE10100904A1 (en) 2001-01-11 2001-01-11 Fine mesh sieve, for pressure sorting in the paper industry, is tensed between flanges which also carry a supporting coarse mesh wire sieve on a diagonal, to support the fine mesh against alternating underpressure/overpressure forces

Country Status (1)

Country Link
DE (1) DE10100904A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7077362B2 (en) * 2002-06-06 2006-07-18 Haver & Boecker Sieve tray for a sieve device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7077362B2 (en) * 2002-06-06 2006-07-18 Haver & Boecker Sieve tray for a sieve device

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8127 New person/name/address of the applicant

Owner name: FAN SEPARATOR GMBH, 59510 LIPPETAL, DE

8141 Disposal/no request for examination