EP1084290A1 - Pulper - Google Patents

Pulper

Info

Publication number
EP1084290A1
EP1084290A1 EP99927861A EP99927861A EP1084290A1 EP 1084290 A1 EP1084290 A1 EP 1084290A1 EP 99927861 A EP99927861 A EP 99927861A EP 99927861 A EP99927861 A EP 99927861A EP 1084290 A1 EP1084290 A1 EP 1084290A1
Authority
EP
European Patent Office
Prior art keywords
fabric
container
flow
sieve
truncated cone
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.)
Granted
Application number
EP99927861A
Other languages
German (de)
French (fr)
Other versions
EP1084290B1 (en
Inventor
Harry Wiljan
Roland Carra
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.)
BTA International GmbH
Original Assignee
REA Gesellschaft fur Recycling von Energie und Abfall mbH
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 REA Gesellschaft fur Recycling von Energie und Abfall mbH filed Critical REA Gesellschaft fur Recycling von Energie und Abfall mbH
Publication of EP1084290A1 publication Critical patent/EP1084290A1/en
Application granted granted Critical
Publication of EP1084290B1 publication Critical patent/EP1084290B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
    • D21D5/02—Straining or screening the pulp
    • D21D5/06—Rotary screen-drums
    • D21D5/08—Rotary screen-drums combined with a rocking movement
    • 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
    • D21B1/34—Kneading or mixing; Pulpers
    • D21B1/345—Pulpers

Definitions

  • the present invention relates to a screening device for separating coarse materials from a suspension in accordance with the preamble of claim 1 and to a fabric batch device using the same with a screening device which has the shape of a truncated cone.
  • Sieving units can be found in a wide variety of industries for a wide variety of applications. Screening units are very widespread in processing technology, where they are used for sorting flowable substances containing solids of different sizes. An important application is the so-called pulpless pulper, which is used to prepare mixtures of substances that contain easily friable components. Important areas of application are in the treatment of waste and waste-like substances as well as in the paper industry in the treatment of waste paper.
  • Such a pulper consists of a container provided with a rotor. In operation, this is prepared ting mixture of substances entered in the container and also a liquid, generally water, m filled the container. The rotor is rotated and thereby generates strong flow forces. Seen in an axial section through the pulper, this flow has a toroidal shape, with two main flow components overlapping, namely a radial and a concentric flow direction. In the rotor area this flow is initially formed radially outwards against the container wall, it then rises upwards in order to
  • a preferred application is, for example, the processing of waste paper or the processing of waste for the biological recycling of individual components.
  • the components that can be recycled biologically are separated from the components that cannot be recycled biologically. Because the bio-usable components are easily shredded, compared to the other components that are difficult or not shrinkable.
  • the suspension produced and separated by the perforated sieve, in which the biologically usable constituents are concentrated, can then be sent for biological utilization, while the biologically non-usable constituents, i.e. the coarse substances that remain in the pulper after the suspension has been drawn off, are separated and one other appropriate forms of recycling can be disposed of or disposed of.
  • Other screens previously used in conjunction with pulps for separating the coarse matter from the suspension are either in the form of a flat screen (for example EP 0 520 172 Bl or DE 195 06 084 AI) or as a cylindrical screen (for example EP 0 598 187 Bl).
  • the use of a cylindrical vertical screen leads to other disadvantages.
  • the suspension is drawn off through the vertically positioned sieve parts.
  • the non-defibrated coarse material tends to collect around the sieve at the pulperooden and thus block the passage of the sieve.
  • the flow behavior in the pulper is unsuitable, a satisfactory one Moving the coarse material and thus cleaning the screen surface to bring about, since the flow does not touch the vertical parts of the screen.
  • the sieve can only be cleaned by additional measures, generally through the use of room strips.
  • the coarse materials that accumulate around the sieve on the pulper base also contribute to increased wear.
  • the use of room strips also leads to a further significant disadvantage in that the room strips greatly reduce the plastic components present in the waste. These small plastic particles can then pass through the perforated sieve with the suspension. In this way, they contaminate the suspension intended for biological recycling and thus also lead to an undesirable degree of contamination of the end products, especially the compost and the process water.
  • the object of the present invention is to improve the fabric batch device defined at the outset for separating coarse materials from a suspension in such a way that wear is reduced, clearance and maintenance of the screen are facilitated, the flow of the suspension is accelerated and the product quality is improved.
  • a sieve device which has the shape of a truncated cone.
  • the truncated cone points upwards with its smaller circular area.
  • the sieve openings are arranged on the inclined surface of the truncated cone.
  • the slope is designed so that it lies approximately tangentially or parallel to the toroidal flow.
  • the screening device is segmented and attachable from the outside.
  • the inclination or inclination is preferably 30 ° -50 °, this value being able to vary depending on the shape of the container.
  • the oblique arrangement has the consequence that the flow acts steadily so that the coarse substances sinking in the pulper are removed from the surface of the screen, that is to say they are carried away by the flow.
  • This process is further promoted by the use of scrapers, which, however, are subject to a lower load than in the prior art. This is because cleaning does not take place exclusively via the room strips, as in the case of the flat sieves or cylindrical sieves shown, but to a considerable extent via the flow.
  • the abrasion caused by sand, pebbles, glass etc. also becomes significant - lent reduced.
  • the better cleaning of the sieve surface also favors the flow through the sieve and thus reduces the withdrawal time of the suspension.
  • the sieve openings can be designed differently, e.g. be square, circular or elongated. Their characteristic dimensions are preferably 6-30 mm.
  • the screen is preferably divided into segments to facilitate its removal.
  • the wipers used to support the cleaning of the sieve punches from coarse dirt are preferably attached to the rotor or its shaft and can also have a wide variety of designs. You can e.g. be straight or oblique.
  • the wipers are preferably continuously or discontinuously curved to prevent flow and are equipped with a wear strip.
  • the wear strip is preferably interchangeable and / or adjustable.
  • a pump is preferably used, the drive of which is adjustable, but a free drain into a lower-lying storage container is also possible.
  • the invention is particularly suitable for use within the
  • waste mixtures with a high proportion of organs such as municipal bio-waste
  • organs such as municipal bio-waste
  • biogenic-organic components that are suitable for biological treatment and subsequent recycling into the natural cycle, due to a relevant proportion of non-biogenic organic substances such as plastics, stones, glass and metals.
  • FIGS. 1 a to 1 c show a schematic illustration of an embodiment of the screening device according to the invention, namely FIG. 1 a in cross section, FIG. 1 b in section along the line AA 'of FIG. 1 a and 1 c an enlarged detail of the area designated Z. .
  • the waste mixture is fed to the cylindrical pulper container 1 with the addition of water.
  • I denotes the waste supply line and II the water supply line.
  • the waste water mixture is set in motion by rotations of the rotor 2 about the container axis R.
  • a strong toroidal flow 3 is generated, which leads to the biogen-organic, non-woody components of the waste being fiberized.
  • These fibers form a suspension with the liquid present in the pulper, which is drawn off through the frustoconical perforated sieve 4 located in the lower part of the pulper and flows out of the outlet III, to which a pump (not shown) can be connected.
  • the non-organic gen-orgamschen un ⁇ the woody components of the waste, which remain largely undestroyed by the flow forces, ie the coarse materials.
  • the suspension produced and separated by the perforated sieve, in which the biologically usable constituents are concentrated, can then be sent for biological utilization, while the biologically non-usable constituents, i.e. the coarse substances that remain in the pulper after the suspension has been drawn off, are appropriate to another Form of recovery or other disposal can be supplied.
  • the embodiment of the screening device 4 according to the invention described here has the shape of a truncated cone.
  • Sieve openings are located on the lateral surface 5 of the truncated cone, are round and have a diameter of typically 10 mm.
  • the inclination of the outer screen surface is approximately 30 ° to 50 ° with respect to the axis of rotation R.
  • wipers 6 are fastened to the rotor 2 or the rotor shaft and are curved in an arc-shaped manner to prevent flow.
  • the front of the wipers 6 is protected by an exchangeable and adjustable wear plate 6a.
  • the sieve segments of the sieve 4 are fastened to the webs 9 with screws 8 from the outside of the container such that they can be removed from the inner side of the container when the screws 8 are loosened.

Abstract

A pulper device includes a vessel in which an annular flow can be generated. The flow acts upon a liquid-sold mixture located inside the vessel and effects a pulping of the same. The device also comprises a screening device for separating coarse materials from the suspension, whereby the screening device has the shape of a truncated cone. The truncated cone is provided with holes on the lateral surface thereof and can be mounted on the base of the vessel in such a way that the truncated cone points upward with the small circular surface thereof, and the lateral surface lies in an approximately tangential manner to the toroidal flow. The screening device is subdivided into different segments and these segments can be individually mounted from the external side of the vessel.

Description

Stofflosevorrichtung Linen device
BESCHREIBUNGDESCRIPTION
Die vorliegende Erfindung betrifft eine Siebvorrichtung zum Trennen von Grobstoffen aus einer Suspension gemäß dem Oberbegriff des Ansprucnes 1 sowie eine diese verwendende Stofflosevorrichtung mit einer Siebvorrichtung, welche die Form eines Kegelstumpfes aufweist.The present invention relates to a screening device for separating coarse materials from a suspension in accordance with the preamble of claim 1 and to a fabric batch device using the same with a screening device which has the shape of a truncated cone.
Derartige Stofflosevorrichtungen sind in αer DE AS 23 48 540 und in der DE AS 26 58 845 sowie in der DE 20 61 519 C2 und in der US A 2,661,666 offenbart.Such fabric lots are disclosed in αer DE AS 23 48 540 and in DE AS 26 58 845 as well as in DE 20 61 519 C2 and in US A 2,661,666.
Siebeinheiten finden sich in den verschiedensten Industriezweigen f r die unterschiedlichsten Anwendungsfalle. Sehr verbreitet sind Siebeinheiten m der Aufbereitungstechnik, wo sie zum Sortieren von fließfahigen Substanzen verwendet werden, die Feststoffe unterschiedlicher Große enthalten. Ein wichtiger Anwendungsfall ist der sogenannte Stoffloser oαer Pulper, der zur Aufbereitung von Stoffgemischen genutzt wird, die leicht zerfaserbare Bestandteile beinhalten. Wichtige Anwendungsbereiche liegen in der Aufbereitung von Abfallen und abfallahnlichen Stoffen sowie m der Papierindustrie bei der Altpapieraufbereitung.Sieving units can be found in a wide variety of industries for a wide variety of applications. Screening units are very widespread in processing technology, where they are used for sorting flowable substances containing solids of different sizes. An important application is the so-called pulpless pulper, which is used to prepare mixtures of substances that contain easily friable components. Important areas of application are in the treatment of waste and waste-like substances as well as in the paper industry in the treatment of waste paper.
E n solcher Pulper Gesteht aus einem Behalter, der mit einem Rotor versehen ist. Beim Betrieb wird das au zuberei- tende Stoffgemisch in den Behalter eingetragen und außerdem eine Flüssigkeit, im allgemeinen Wasser, m den Behalter eingefüllt. Der Rotor wird in Drehungen versetzt und erzeugt hierdurch starke Stromungskrafte . Diese Strömung hat - in einem Axialschnitt durch den Pulper gesehen - eine to- roidale Form, wobei sich zwei Hauptstromungskomponenten überlagern, nämlich eine radiale und eine konzentrische Stromungsrichtung. Im Rotorbereich ist diese Strömung zunächst radial nach außen gegen die Behalterwand ausgebil- det, sie steigt sodann nach oben an, um im Bereich derSuch a pulper consists of a container provided with a rotor. In operation, this is prepared ting mixture of substances entered in the container and also a liquid, generally water, m filled the container. The rotor is rotated and thereby generates strong flow forces. Seen in an axial section through the pulper, this flow has a toroidal shape, with two main flow components overlapping, namely a radial and a concentric flow direction. In the rotor area this flow is initially formed radially outwards against the container wall, it then rises upwards in order to
Flussigkeitsoberflache wieder radial nach innen zu strömen und sodann zum Zentrum des Rotors geleitet zu werden. Diese Strömung kann durch anbringen zusätzlicher Leitbleche unterstutzt werden. Gleichzeitig erfahrt die Flüssigkeit noch einen Bewegungsimpuls in der Drehrichtung des Rotors. Diese toroidale Strömung sorgt dafür, daß die m der Flüssigkeit enthaltenen Feststoffe immer wieder m den Bereich des Rotors gelangen und dort bearbeitet werden.To flow radially inward again and then to be directed to the center of the rotor. This flow can be supported by adding additional baffles. At the same time, the liquid experiences a movement impulse in the direction of rotation of the rotor. This toroidal flow ensures that the solids contained in the liquid repeatedly reach the area of the rotor and are processed there.
Durch die starke Strömung werden die im Pulper enthaltenen Feststoffe, die leicht zerfaserbar sind, zerfasert. Neben der Zerfaserung findet teilweise auch eine Verkürzung von Fasern statt bzw. geht ein Teil der zerfaserbaren Stoffe in Losung. Nachdem das Schwergewicht des Vorganges aber in der Zerfaserung besteht, wird hier lediglich von „Zerfaserung" oder „Zerfasern" gesprochen und die daneben stattfindende Zerkleinerung und Auflosung nicht gesondert erwähnt. Die zerfaserten Bestandteile des eingebrachten Stoffgemi- scnes bilden zusammen mit der Flüssigkeit eine Suspension, die durch ein Lochsieb aus dem Pulper abgezogen werden kann. Die im Pulper zurückbleibenden nicht zerfaserten Be- standteile (m der Folge auch „Grobstoffe" genannt) können auf andere Art und Weise, z.B. durch einen in den Pulper greifenden Grobschmutzfanger aus dem Pulper entfernt werden .Due to the strong flow, the solids contained in the pulper, which are easy to shred, are shredded. In addition to fiberization, fibers are sometimes shortened or some of the fiberizable substances go into solution. However, since the focus of the process is on defibration, the term "defibration" or "defibration" is used here and the comminution and disintegration that take place next to it are not mentioned separately. The frayed constituents of the mixture of substances introduced together with the liquid form a suspension which can be drawn out of the pulper through a perforated sieve. The non-defibrated constituents remaining in the pulper (hereinafter also referred to as “coarse materials”) can be removed from the pulper in a different way, for example by means of a coarse dirt trap which engages in the pulper.
Ein bevorzugter Anwendungsfall ist zum Beispiel die Aufbereitung von Altpapier oder die Aufbereitung von Abfallen für eine biologische Verwertung einzelner Bestandteile. Bei der Aufbereitung von Abfallen werden die Bestandteile, die biologisch gut zu verwerten sind, von den nicht biologisch verwertbaren Bestandteilen getrennt. Denn die biologisch verwertbaren Bestandteile sind leicht zerfaserbar, im Vergleich zu den anderen Bestandteilen, die nur schwer oder nicht zerfaserbar sind.A preferred application is, for example, the processing of waste paper or the processing of waste for the biological recycling of individual components. In the treatment of waste, the components that can be recycled biologically are separated from the components that cannot be recycled biologically. Because the bio-usable components are easily shredded, compared to the other components that are difficult or not shrinkable.
Die erzeugte und durch das Lochsieb abgetrennte Suspension, m der die biologisch verwertbaren Bestandteile aufkonzentriert sind, kann dann der biologischen Verwertung zugeführt werden, wahrend die biologisch nicht verwertbaren Bestandteile, d.h. die Grobstoffe, die nach dem Abzug der Suspension im Pulper verbleiben, abgeschieden und einer anderen angemessenen Verwertungsform zugeleitet werden können oαer entsorgt werden. Weitere bislang in Verbindung mit Pulpern zur Trennung der Grobstoffe aus der Suspension verwendeten Siebe s nd entweder als Flachsieb (so etwa EP 0 520 172 Bl oder DE 195 06 084 AI) oder als zylindrisches Sieb (so z.B. EP 0 598 187 Bl) ausgebildet.The suspension produced and separated by the perforated sieve, in which the biologically usable constituents are concentrated, can then be sent for biological utilization, while the biologically non-usable constituents, i.e. the coarse substances that remain in the pulper after the suspension has been drawn off, are separated and one other appropriate forms of recycling can be disposed of or disposed of. Other screens previously used in conjunction with pulps for separating the coarse matter from the suspension are either in the form of a flat screen (for example EP 0 520 172 Bl or DE 195 06 084 AI) or as a cylindrical screen (for example EP 0 598 187 Bl).
Die Verwendung eines Flachsiebes fuhrt dazu, daß die toroi- dale Strömung auf dem Sieb umgelenkt wird. Nachteilig ist dabei, daß die im Pulper vorhandenen nicht oder nur schwer zerfaserbaren Feststoffe, z.B. Steine, Glassplitter u.a., auf diese Weise einen hohen Verschleiß des Siebes verursachen. Zudem besteht die Gefahr, daß sich die Sieblocher zusetzen. Schwere Bestandteile aus dem Stoffgemisch haben die Tendenz, auf das Sieb zu sinken und dort liegenzubleiben, sofern sie nicht zerfasert werden und das Sieb nicht mit der Suspension passieren können. Eine gebrauchliche Methode, das Sieb von solchen Grobstoffen freizuhalten und den Durchgang für die Suspension zu gewahrleisten, besteht darin, durch Raumleisten die Sieboberflache immer wieder zu säubern. Diese Raumleisten unterliegen aber ebenfalls einem honen Verschleiß.The use of a flat screen results in the toroidal flow on the screen being deflected. The disadvantage here is that the solids present in the pulper are difficult or impossible to fiberize, e.g. Stones, broken glass, etc., cause high strain on the sieve. There is also a risk that the sieve punches become clogged. Heavy constituents from the mixture of substances tend to sink onto the sieve and remain there, provided that they are not defibrated and the suspension cannot pass through the sieve. A common method of keeping the sieve free of such coarse substances and ensuring the passage for the suspension is to clean the sieve surface again and again by means of space strips. However, these room strips are also subject to excessive wear.
Die Verwendung eines zylindrischen Vertikalsiebes fuhrt zu anderen Nachteilen. Die Suspension wird hier durch die senkrecht situierten Siebteile abgezogen. Die nicht zerfaserten Grobstoffe haben m diesem Fall die Tendenz, sich um das Sieb herum am Pulperooden zu sammeln und den Durchgang des Siebes auf diese Weise zu versperren. Die Stromungsver- haltmsse im Pulper sind nicht geeignet, eine befriedigende Fortbewegung der Grobstoffe und damit eine Reinigung der Sieboberflache herbeizufuhren, da die Strömung die senkrechten Teile des Siebes nicht berührt. Auch hier kann das Sieb ausschließlich durch zusätzliche Maßnahmen, m der Re- gel durch den Einsatz von Raumleisten, gesäubert werden. Die sich um das Sieb herum am Pulperboden ansammelnden Grobstoffe tragen ebenfalls zu einem erhöhten Verschleiß bei. Der Einsatz von Raumleisten fuhrt überdies zu einem weiteren wesentlichen Nachteil dadurch, daß die Raumleisten die im Abfall vorhandenen Plastikbestandteile stark zerkleinern. Diese kleinen Plastikpartikel können dann mit der Suspension das Lochsieb passieren. Sie verschmutzen so die für eine biologische Verwertung bestimmte Suspension und fuhren damit auch zu einem unerwünschten Verschmutzungsgrad der Endprodukte, vor allem des Kompostes und des Prozeßwassers .The use of a cylindrical vertical screen leads to other disadvantages. The suspension is drawn off through the vertically positioned sieve parts. In this case, the non-defibrated coarse material tends to collect around the sieve at the pulperooden and thus block the passage of the sieve. The flow behavior in the pulper is unsuitable, a satisfactory one Moving the coarse material and thus cleaning the screen surface to bring about, since the flow does not touch the vertical parts of the screen. Here, too, the sieve can only be cleaned by additional measures, generally through the use of room strips. The coarse materials that accumulate around the sieve on the pulper base also contribute to increased wear. The use of room strips also leads to a further significant disadvantage in that the room strips greatly reduce the plastic components present in the waste. These small plastic particles can then pass through the perforated sieve with the suspension. In this way, they contaminate the suspension intended for biological recycling and thus also lead to an undesirable degree of contamination of the end products, especially the compost and the process water.
Die Aufgabe der vorliegenden Erfindung besteht darin, die eingangs definierte Stofflosevorrichtung zum Trennen von Grobstoffen aus einer Suspension derart zu verbessern, daß sich der Verschleiß vermindert, die Räumung und die Wartung des Siebes erleichtern, der Durchfluß der Suspension beschleunigt und die Produktqualltat verbessert wird.The object of the present invention is to improve the fabric batch device defined at the outset for separating coarse materials from a suspension in such a way that wear is reduced, clearance and maintenance of the screen are facilitated, the flow of the suspension is accelerated and the product quality is improved.
Erfmdungsgemaß wird diese Aufgabe durch die im Patentanspruch 1 angegebene Stofflosevorrichtung gelost. Die Un- teranspruche geben weitere bevorzugte Weiterbildungen der Erfindung an. - DAccording to the invention, this object is achieved by the fabric-less device specified in claim 1. The subclaims indicate further preferred developments of the invention. - D
Die der vorliegenden Erfindung zugrundeliegende Idee liegt darin, daß eine Siebvorrichtung eingesetzt wird, die die Form eines Kegelstumpfes aufweist. Der Kegelstumpf zeigt mit seiner kleineren Kreisfläche nach oben. Die Sieboffnun- gen sind auf der schrägen Mantelflache des Kegelstumpfes angeordnet. Die Schräge ist so konzipiert, daß sie m etwa tangential bzw. parallel zur toroidalen Strömung liegt. Weiterhin ist die Siebvorrichtung segmentiert und von außen anbringbar.The idea on which the present invention is based is that a sieve device is used which has the shape of a truncated cone. The truncated cone points upwards with its smaller circular area. The sieve openings are arranged on the inclined surface of the truncated cone. The slope is designed so that it lies approximately tangentially or parallel to the toroidal flow. Furthermore, the screening device is segmented and attachable from the outside.
Die Neigung bzw. Schräge betragt vorzugsweise 30°-50°, wobei dieser Wert abhangig von der Form des Behalters variieren kann. Die schräge Anordnung hat zur Folge, daß die Strömung standig dahin wirkt, daß die im Pulper absinkenden Grobstoffe von der Mantelflache des Siebes entfernt werden, also von der Strömung mitgerissen werden. Dieser Vorgang wird durch den Gebrauch von Abstreifern noch begünstigt, welche allerdings einer geringeren Belastung als beim Stand der Technik unterliegen. Die Reinigung findet nämlich nicht, wie bei den dargestellten Flachsieben oder den zylindrischen Sieben, ausschließlich über die Raumleisten statt, sondern in erheblichem Maße über die Strömung.The inclination or inclination is preferably 30 ° -50 °, this value being able to vary depending on the shape of the container. The oblique arrangement has the consequence that the flow acts steadily so that the coarse substances sinking in the pulper are removed from the surface of the screen, that is to say they are carried away by the flow. This process is further promoted by the use of scrapers, which, however, are subject to a lower load than in the prior art. This is because cleaning does not take place exclusively via the room strips, as in the case of the flat sieves or cylindrical sieves shown, but to a considerable extent via the flow.
Nachdem die Grobstoffe standig mit der Strömung vom Sieb wegbewegt werden und sich daher weit weniger als bei den nach dem Stand der Tecnnik verwendeten Siebvorrichtungen auf dem Sieb oder um das Sieb sammeln können, wird auch der durch Sand, Steinchen, Glas etc. verursachte Abrieb wesent- lieh reduziert. Durch die bessere Reinigung der Sieboberflache wird ferner der Durchfluß durch das Sieb begünstigt und damit die Abzugszeit der Suspension verringert.After the coarse materials are constantly moved away from the sieve with the flow and can therefore collect far less on the sieve or around the sieve than in the sieving devices used according to the state of the art, the abrasion caused by sand, pebbles, glass etc. also becomes significant - lent reduced. The better cleaning of the sieve surface also favors the flow through the sieve and thus reduces the withdrawal time of the suspension.
Die Sieboffnungen können verschieden gestaltet sein, z.B. quadratisch, kreisförmig oder länglich, ausgebildet sein. Ihre charakteristischen Abmessungen betragen vorzugsweise 6-30 mm. Das Sieb ist vorzugsweise m Segmente unterteilt, um seinen Ausbau zu erleichtern.The sieve openings can be designed differently, e.g. be square, circular or elongated. Their characteristic dimensions are preferably 6-30 mm. The screen is preferably divided into segments to facilitate its removal.
Die zur Unterstützung der Reinigung der Sieblocher von Grobschmutz eingesetzten Abstreifer sind vorzugsweise am Rotor bzw. dessen Welle befestigt und können ebenfalls unterschiedlichste Gestaltungen aufweisen. Sie können z.B. gerade oder schräg sein. Vorzugsweise sind die Abstreifer stetig oder unstetig stromungsabweisend gekrümmt und mit einer Verschleißleiste ausgestattet. Die Verschleißleiste ist vorzugsweise austauschbar und/oder verstellbar.The wipers used to support the cleaning of the sieve punches from coarse dirt are preferably attached to the rotor or its shaft and can also have a wide variety of designs. You can e.g. be straight or oblique. The wipers are preferably continuously or discontinuously curved to prevent flow and are equipped with a wear strip. The wear strip is preferably interchangeable and / or adjustable.
Zum Abziehen der Suspension aus dem Pulper durch das Sieb wird vorzugsweise eine Pumpe eingesetzt, deren Antrieb regelbar ist, aber auch ein freier Ablauf in einen tiefergelegenen Speicherbehalter ist möglich.To withdraw the suspension from the pulper through the sieve, a pump is preferably used, the drive of which is adjustable, but a free drain into a lower-lying storage container is also possible.
Die Erfindung ist insbesondere zum Einsatz im Rahmen derThe invention is particularly suitable for use within the
Aufbereitung und Trennung von Abfallgemischen mit einem hohen Orgamkanteil , z.B. von kommunalen Bioabfallen, geeignet. Diese Abfalle zeichnen sich neben biogen-orgamschen Bestandteilen, die sich für eine biologische Behandlung und anschließendes Recycling in den Naturkreislauf eignen, durch einen relevanten Anteil an nicht biogen-organischen Storstoffen, wie Kunststoffen, Steinen, Glas und Metallen aus .Processing and separation of waste mixtures with a high proportion of organs, such as municipal bio-waste, are suitable. These wastes stand out alongside biogenic-organic components that are suitable for biological treatment and subsequent recycling into the natural cycle, due to a relevant proportion of non-biogenic organic substances such as plastics, stones, glass and metals.
Nachstehend wird die vorliegende Erfindung anhand eines bevorzugten Anwendungsbeispiels unter Bezugnahme auf die begleitende Zeichnung naher erläutert.The present invention is explained in more detail below on the basis of a preferred application example with reference to the accompanying drawing.
Fig. la bis lc zeigen eine schematische Darstellung einer Ausfuhrungsform der erfmdungsgemaßen Siebvorrichtung, und zwar Fig. la im Querschnitt, Fig. lb im Schnitt entlang der Linie A-A' von Fig. la und Fig. lc eine Ausschnittsvergro- ßerung des mit Z bezeichneten Bereichs.FIGS. 1 a to 1 c show a schematic illustration of an embodiment of the screening device according to the invention, namely FIG. 1 a in cross section, FIG. 1 b in section along the line AA 'of FIG. 1 a and 1 c an enlarged detail of the area designated Z. .
Das Abfallgemisch wird dem zylindrischen Pulperbehalter 1 unter Zugabe von Wasser zugeführt. I bezeichnet die Abfallzuleitung und II die Wasserzuleitung .The waste mixture is fed to the cylindrical pulper container 1 with the addition of water. I denotes the waste supply line and II the water supply line.
Durch Drehungen des Rotors 2 um die Behalterachse R wird das Abfall-Wasser-Gemisch in Bewegung versetzt. Es wird eine starke toroidale Strömung 3 erzeugt, die dazu fuhrt, daß die biogen-organischen nicht verholzten Bestandteile des Abfalls zerfasert werden. Diese Fasern bilden mit der im Pulper vorhandenen Flüssigkeit eine Suspension, die durch das im unteren Teil des Pulpers befindliche kegelstumpfformige Lochsieb 4 abgezogen wird und aus dem Ausfluß III strömt, an den ggfs. eine (nicht gezeigte) Pumpe anschließbar ist. Zurück im Pulperbehalter 1 bleiben die nicht bio- gen-orgamschen unα die verholzten Bestandteile des Abfalls, die durch die Stromungskrafte weitgehend unzerstort bleiben, d.h. die Grobstoffe.The waste water mixture is set in motion by rotations of the rotor 2 about the container axis R. A strong toroidal flow 3 is generated, which leads to the biogen-organic, non-woody components of the waste being fiberized. These fibers form a suspension with the liquid present in the pulper, which is drawn off through the frustoconical perforated sieve 4 located in the lower part of the pulper and flows out of the outlet III, to which a pump (not shown) can be connected. Back in the pulper container 1, the non-organic gen-orgamschen unα the woody components of the waste, which remain largely undestroyed by the flow forces, ie the coarse materials.
Die erzeugte und durch das Lochsieb abgetrennte Suspension, m der die biologisch verwertbaren Bestandteile aufkonzentriert sind, kann dann der biologischen Verwertung zugeführt werden, wahrend die biologisch nicht verwertbaren Bestandteile, also die Grobstoffe, die nach dem Abzug der Suspension im Pulper verbleiben, einer anderen angemessenen Verwertungsform oder einer anderweitigen Entsorgung zugeleitet werden können.The suspension produced and separated by the perforated sieve, in which the biologically usable constituents are concentrated, can then be sent for biological utilization, while the biologically non-usable constituents, i.e. the coarse substances that remain in the pulper after the suspension has been drawn off, are appropriate to another Form of recovery or other disposal can be supplied.
Die hier beschriebene Ausfuhrungsform der erfmdungsgemaßen Siebvorrichtung 4 hat die Form eines Kegelstumpfes. DieThe embodiment of the screening device 4 according to the invention described here has the shape of a truncated cone. The
Sieboffnungen befinden sich an der Mantelflache 5 des Kegelstumpfes, sind rund und weisen einen Durchmesser von typischerweise 10 mm auf. Die Neigung der äußeren Siebflache betragt ca. 30° bis 50° gegenüber der Rotationsachse R.Sieve openings are located on the lateral surface 5 of the truncated cone, are round and have a diameter of typically 10 mm. The inclination of the outer screen surface is approximately 30 ° to 50 ° with respect to the axis of rotation R.
Wie insbesondere aus Fig. lb ersichtlich, sind am Rotor 2 bzw. der Rotorwelle sind Abstreifer 6 befestigt, die stro- mungsabweisend bogenförmig gekrümmt sind. Die Vorderseite der Abstreifer 6 ist durch ein austausch- und verstellbares Verschleißschild 6a geschützt. Unterhalb des Auslasses III befindet sich ein (nicht gezeigter) Auffangbehalter , m dem die ablaufende Suspension aufgefangen wird. Wie in Fig. lc erkennbar, sind die Siebsegmente des Siebes 4 von der Behalteraußenseite her mit Schrauben 8 an Stegen 9 derart befestigt, daß sie bei gelosten Schrauben 8 von der Behalteπnnenseite her abnehmbar sind.As can be seen in particular from FIG. 1b, wipers 6 are fastened to the rotor 2 or the rotor shaft and are curved in an arc-shaped manner to prevent flow. The front of the wipers 6 is protected by an exchangeable and adjustable wear plate 6a. Below the outlet III there is a collecting container (not shown), in which the running off suspension is collected. As can be seen in FIG. 1 c, the sieve segments of the sieve 4 are fastened to the webs 9 with screws 8 from the outside of the container such that they can be removed from the inner side of the container when the screws 8 are loosened.
Obwohl die vorliegende Erfindung vorstehend anhand eines bevorzugten Ausführungsbeispiels beschrieben wurde, ist sie darauf nicht beschrankt, sondern auf vielfaltige Art und Weise modifizierbar. Although the present invention has been described above on the basis of a preferred exemplary embodiment, it is not restricted to this but can be modified in a variety of ways.

Claims

PATENTANSPRÜCHE PATENT CLAIMS
1. Stofflosevorrichtung mit einem Behalter (1), in dem eine ringförmige Strömung erzeugbar ist, die auf ein in dem Behalter (1) befindliches Flussigkeits-Feststoff-Gemisch einwirkt und eine Zerfaserung desselben bewirkt, mit einer Siebvorrichtung (4) zum Trennen von Grobstoffen aus der Suspension, wobei die Siebvorrichtung (4) die Form eines Kegelstumpfes aufweist, der an seiner Mantelflache mit Lo- ehern versehen ist und derart am Boden des Behalters (1) einbaubar ist, daß der Kegelstumpf mit seiner kleineren Kreisfläche nach oben zeigt und die Mantelflache in etwa tangential zur torodialen Strömung liegt; wobei die Siebvorrichtung (4) m verschiedene Segmente unterteilt ist und diese einzeln von der Behalteraußenseite her anbringbar sind.1. Fabric lot device with a container (1) in which an annular flow can be generated, which acts on a liquid-solid mixture in the container (1) and causes the same to be defibrated, with a sieve device (4) for separating coarse materials from the suspension, the sieve device (4) having the shape of a truncated cone which is provided with holes on its outer surface and can be installed on the bottom of the container (1) in such a way that the truncated cone with its smaller circular area points upwards and the Jacket surface is approximately tangential to the toroidal flow; wherein the screening device (4) is divided into m different segments and these can be attached individually from the outside of the container.
2. Stofflosevorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Neigung der Mantelflache zwischen 30° und 50° betragt.2. Fabric lot device according to claim 1, characterized in that the inclination of the jacket surface is between 30 ° and 50 °.
3. Stofflosevorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Sieblocher quadratisch, kreisförmig oder länglich ausgebildet sind.3. Fabric lot device according to claim 1 or 2, characterized in that the perforated holes are square, circular or elongated.
4. Stofflosevorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die charakteristischen Abmessungen der Sieblocner 6 - 30 mm betragen. 4. Fabric lot device according to one of the preceding claims, characterized in that the characteristic dimensions of the Sieblocner are 6 - 30 mm.
5. Stofflosevorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Sieblocher kreisförmig beschaffen sind und vorzugsweise einen Durchmesser von 8 - 12 mm aufweisen.5. Fabric lot device according to one of the preceding claims, characterized in that the perforated holes are circular and preferably have a diameter of 8-12 mm.
6. Stofflosevorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß im Behalter (1) eine Rotoreinrichtung (2) vorgesehen ist und der Kegelstumpf im wesentlichen parallel zur Rotorachse einbaubar ist.6. Fabric batch device according to one of the preceding claims, characterized in that a rotor device (2) is provided in the container (1) and the truncated cone can be installed substantially parallel to the rotor axis.
7. Stofflosevorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß eine Abstreifereinrichtung (6) vorgesehen ist, die vorzugsweise mit der Ro- toremπchtung (2) drehbar verbunden ist, und die mit Lo- ehern versehene Siebflache durch die Abstreifereinrichtung (6) reinigbar ist.7. Fabric batch device according to one of the preceding claims, characterized in that a wiper device (6) is provided, which is preferably rotatably connected to the rotor device (2), and the screen surface provided with holes is cleanable by the wiper device (6) is.
8. Stofflosevorrichtung nach Anspruch 7, dadurch gekennzeichnet, daß die Abstreifereinrichtung (6) einen oder meh- rere Abstreifer mit einer stetigen oder unstetigen stro- mungsabweisende Krümmung aufweist.8. Fabric lot device according to claim 7, characterized in that the wiper device (6) has one or more wipers with a continuous or discontinuous flow-resistant curvature.
9. Stofflosevorrichtung nach Anspruch 8, dadurch gekennzeichnet, daß die Abstreifer an ihrer Vorderseite mit einem austauschbaren und/oder verstellbaren Verschleißschild ausgestattet sind.9. Fabric lot device according to claim 8, characterized in that the wipers are equipped on their front with an exchangeable and / or adjustable wear plate.
10. Stofflosevorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Suspension durch die Siebvorrichtung (4) mittels einer Pumpe abziehbar ist, die mit einem regelbaren Antrieb versehen ist. 10. Fabric batch device according to one of the preceding claims, characterized in that the suspension by the screening device (4) can be removed by means of a pump which is provided with a controllable drive.
EP99927861A 1998-06-03 1999-06-02 Pulper Expired - Lifetime EP1084290B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19824806 1998-06-03
DE19824806A DE19824806A1 (en) 1998-06-03 1998-06-03 Screening device and fabric dissolving device using this
PCT/EP1999/003852 WO1999063148A1 (en) 1998-06-03 1999-06-02 Pulper

Publications (2)

Publication Number Publication Date
EP1084290A1 true EP1084290A1 (en) 2001-03-21
EP1084290B1 EP1084290B1 (en) 2002-08-28

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JP (1) JP3608652B2 (en)
KR (1) KR100516364B1 (en)
AT (1) ATE222970T1 (en)
BR (1) BR9910855B1 (en)
CA (1) CA2333640C (en)
CZ (1) CZ291696B6 (en)
DE (2) DE19824806A1 (en)
ES (1) ES2183571T3 (en)
PL (1) PL189958B1 (en)
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KR20010052565A (en) 2001-06-25
CA2333640A1 (en) 1999-12-09
ES2183571T3 (en) 2003-03-16
CZ291696B6 (en) 2003-05-14
BR9910855B1 (en) 2010-09-21
CZ20004467A3 (en) 2001-04-11
DE19824806A1 (en) 1999-12-09
US6379505B1 (en) 2002-04-30
BR9910855A (en) 2001-03-06
JP3608652B2 (en) 2005-01-12
ATE222970T1 (en) 2002-09-15
PL189958B1 (en) 2005-10-31
DE59902475D1 (en) 2002-10-02
CA2333640C (en) 2006-11-14
WO1999063148A1 (en) 1999-12-09
KR100516364B1 (en) 2005-09-26
EP1084290B1 (en) 2002-08-28
JP2002517620A (en) 2002-06-18
PL344680A1 (en) 2001-11-19

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