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EP0049450A2 - Mixer for bulk goods, especially for fibrous suspensions - Google Patents

Mixer for bulk goods, especially for fibrous suspensions Download PDF

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Publication number
EP0049450A2
EP0049450A2 EP81107682A EP81107682A EP0049450A2 EP 0049450 A2 EP0049450 A2 EP 0049450A2 EP 81107682 A EP81107682 A EP 81107682A EP 81107682 A EP81107682 A EP 81107682A EP 0049450 A2 EP0049450 A2 EP 0049450A2
Authority
EP
European Patent Office
Prior art keywords
grinding
stators
mixer according
shaft
container
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
EP81107682A
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German (de)
French (fr)
Other versions
EP0049450B1 (en
EP0049450A3 (en
Inventor
Eberhard Ing.-Grad. Lipp
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Draiswerke GmbH
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Draiswerke GmbH
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Publication date
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Publication of EP0049450A3 publication Critical patent/EP0049450A3/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
    • B01F27/70—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms
    • B01F27/707—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with paddles, blades or arms the paddles co-operating, e.g. intermeshing, with elements on the receptacle wall
    • 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
    • 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
    • D21B1/342—Mixing apparatus

Definitions

  • the invention relates to a mixer for bulk material, in particular for fibrous suspensions such as cellulose derivatives, in the form of a horizontally arranged, drum-shaped or trough-shaped container with a drivable blade mechanism which has mixing blades arranged radially on a shaft running through the container in the longitudinal direction.
  • Such devices for drying, reacting and mixing bulk goods which have a drum-shaped container with a horizontal longitudinal axis, in which a drivable shaft is mounted centrally, which carries mixing tools on radially arranged arms.
  • Such devices are not able to crush hard, tough or fibrous agglomerates or granules that are present in the starting product or that arise during drying, reaction or mixing.
  • Such agglomerates lead to longer drying times, reaction times and inhomogeneous end products.
  • the object of the invention is now to provide a robust mixing device for the heat treatment of bulk goods, which avoids the aforementioned disadvantages, especially instead of crushing by impact, which is made possible by cleaning and cutting and makes additional drive units unnecessary.
  • the grinding rings enable the setting of a grinding gap and thus a forced reduction, whereby by specifying the grinding gap, a homogeneous grain distribution takes place and a grinding process that follows the process can be omitted.
  • the grinding rings can be arranged on spoke wheels. However, if the grinding rings are arranged on non-perforated disks, this promotes the mixing process, because the disks move the bulk material increasingly in the axial direction.
  • the panes can advantageously be heated, which can shorten drying times.
  • the grinding stators preferably consist of cylinder surfaces which are adjustably arranged in the container housing or of strips arranged on covered cylinder surfaces; Grinding stators broken through in this way have the advantage of being permeable to the material to be mixed, which favors the success of the mixing.
  • the grinding rings appropriately have exchangeable grinding segments on the circumference. Since the holders of the grinding stators only in their axial direction, i.e. can be moved in the radial direction with respect to the shaft of the mixer, they can be made simple and robust and a lateral kinking can thus be excluded.
  • the appropriate number of pairs of grinding tools formed from a grinding ring and a grinding stator depends on the length of the mixer Dwell time and the properties of the bulk material. According to the invention, at least one such pair is provided, but preferably several, but generally not more than one such pair between two adjacent mixing blades.
  • moist, fibrous, pulpy bulk goods and suspensions can be dried, reacted, but also heated, cooled or mixed under negative pressure, normal pressure or positive pressure.
  • the material to be treated is constantly mixed by means of the tools, loosened and fed to the grinding tools, which shred the material in the grinding gap formed by it.
  • the grinding rings are preferably bevelled on both sides, the inclined surfaces facing the grinding stator, as a result of which they impart a movement component to the bulk material in the direction of the grinding stator. Provisions are made to draw off the moisture released from the material and to be able to supply reactants.
  • the mixer shown for bulk material in particular for fibrous suspensions 1, consists of a drum-shaped container 1 with mixing blades 3, which can be driven by a shaft 2 passing through, with holding arms 4, which are evenly distributed over the shaft 2 at a distance and in an angular position. Between some of these mixing blades 3, additional grinding rings 5 are attached centrally on the rotating shaft 2 at an angle to their longitudinal axis, which wobble when rotating.
  • the optimum degree of filling of the container 1 with the mixture 6 is about 70%.
  • the grinding rings 5 interact on their peripheral surface with staiffy counter surfaces of a grinding stator 8, both surfaces preferably being profiled to form cutting and rubbing edges.
  • the counter surfaces consist of cylinder partial surfaces which are adjustably arranged on the container housing 1, while the peripheral surface of the grinding rings 5 is formed from interchangeable grinding segments 7.
  • the counter surfaces of the grinding stator 8 are arranged on supports 9 which can be adjusted from the outside and are oriented radially on the shaft 2 in the container 1 in such a way that mixing blades 3 can pass underneath on one or both sides, as can be seen from FIG becomes.
  • the adjustable supports 9 for the counter surfaces are sealed by means of bellows 10.
  • the counter surfaces of the grinding stator 8 are arranged in the lower region of the container housing 1, preferably on the part which rises in the direction of rotation D of the shaft 2 and make up approximately 10-50%, preferably 25%, of the circumference of the housing 1 covered by the mixing blades 3 .
  • the effective width of the grinding rings 5 corresponds approximately to the axial extent of a mixing blade 3.
  • the counter surfaces of the grinding stators 8 are, as can be seen from FIGS. 1 and 2, under the action of springs 11.
  • the adjustable supports 9 of the grinding stators 8 can be designed as spring pistons be, the spring pistons are preferably formed by so-called constant spring supports, as is not particularly shown here, so that a constant pressure is achieved.
  • the sockets 12, 13 on the housing 1 are used for filling and emptying.
  • They consist of a supporting structure which consists of circular ribs 14 and cutting strips 15 connecting these ribs 14.
  • the cutting strips 15 are provided on their side facing the grinding ring 5 with a profiled surface and lie parallel to one another on one support 9 to be fastened to the housing of the container 1.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)
  • Crushing And Grinding (AREA)

Abstract

Es sind Mischer für Schüttgut, insbesondere für faserige Suspensionen wie Zellulosederivate und ähnliches beschrieben, bei denen in einen liegend angeordneten trommel- oder muldenförmigen Behälter (1) ein antreibbares Schaufelwerk angeordnet ist. Das Schaufelwerk besteht aus einer den Behälter (1) längs durchsetzenden Welle (2), von welcher die Mischschaufeln (3) abstehen. Die Welle (2) trägt ferner schräg zur Welle (2) angeordnete Mahlkränze (5), welche mit der Welle (2) drehfest verbunden sind.Mixers for bulk material, in particular for fibrous suspensions such as cellulose derivatives and the like, have been described, in which a drivable blade mechanism is arranged in a drum or trough-shaped container (1) arranged in a lying position. The blade assembly consists of a shaft (2) which extends longitudinally through the container (1) and from which the mixing blades (3) protrude. The shaft (2) also carries grinding rings (5) arranged at an angle to the shaft (2), which are connected to the shaft (2) in a rotationally fixed manner.

Den Mahlkränzen (5) gegenüberliegend und mit diesen Mahlspalte bildende Mahlstatoren (8) sind stationär am Behälter (1) angebracht. Sie bedecken vorzugsweise nur einen kleineren Teil des Umfangs des Behälters (1).

Figure imgaf001
The grinding rings (5) opposite and with these grinding gaps forming grinding stators (8) are stationary on the container (1). They preferably cover only a smaller part of the circumference of the container (1).
Figure imgaf001

Description

Die Erfindung betrifft einen Mischer für Schüttgut, insbesondere für faserige Suspensionen wie Zellulosederivate,in Form eines liegend angeordneten, trommel- oder muldenförmigen Behälters mit antreibbarem Schaufelwerk, welches an einer in Längsrichtung durch den Behälter laufenden Welle radial angeordnete Mischschaufeln aufweist.The invention relates to a mixer for bulk material, in particular for fibrous suspensions such as cellulose derivatives, in the form of a horizontally arranged, drum-shaped or trough-shaped container with a drivable blade mechanism which has mixing blades arranged radially on a shaft running through the container in the longitudinal direction.

Es sind solche Vorrichtungen zum Trocknen, Reagieren und Mischen von Schüttgütern bekannt, die einen trommelförmigen Behälter mit horizontaler Längsachse aufweisen, in dem eine antreibbare Welle zentral gelagert ist, die an radial angeordneten Armen Mischwerkzeuge trägt. Solche Vorrichtungen sind nicht in der Lage, harte, zähe oder faserige Agglomerate oder Granulate, die im Ausgangsprodukt vorhanden sind oder während der Trocknung, Reaktion oder Vermischung entstehen, zu zerkleinern. Solche Agglomerate führen zu verlängerten Trocknungszeiten, Reaktionszeiten und inhomogenen Endprodukten. Außerdem ist es in der Regel notwendig, einen Mahlprozeß zur Zerkleinerung der Agglomerate nachzuschalten.Such devices for drying, reacting and mixing bulk goods are known which have a drum-shaped container with a horizontal longitudinal axis, in which a drivable shaft is mounted centrally, which carries mixing tools on radially arranged arms. Such devices are not able to crush hard, tough or fibrous agglomerates or granules that are present in the starting product or that arise during drying, reaction or mixing. Such agglomerates lead to longer drying times, reaction times and inhomogeneous end products. In addition, it is usually necessary to add a grinding process for comminuting the agglomerates.

Aus diesem Grunde sind verschiedene Zusatzvorrichtungen für solche Vorrichtungen entwickelt worden, wie eingebaute Stiftmühlen oder Messerköpfe, welche hauptsächlich durch Prallwirkung die entstehenden Agglomerate zerlegen sollen. Hierbei treten folgende Nachteile auf:

  • Aufwendige Abdichtungen der Drehdurchführung der Zusatzvorrichtungen;
  • Gefahr des Abknickens der fliegend gelagerten Wellen der Zusatzvorrichtungen;
  • Im fortgeschrittenen Trocknungsstadium, wenn die Agglomerate oberflächig angetrocknet, im Kern aber noch plastisch sind, neigen sie bei Pralleinwirkung zur Verdichtung, dadurch wird der Diffusionswiderstand erhöht und das Produkt unter Umständen geschädigt;
  • Das Endprodukt hat eine sehr heterogene Kornverteilung;
  • Man benötigt zusätzliche Antriebseinheiten neben dem Hauptwellenantrieb;
  • Es muß ein Mahlprozeß nachgeschaltet werden.
For this reason, various additional devices have been developed for such devices, such as built-in pin mills or knife heads, which are supposed to break down the resulting agglomerates mainly by impact. The following disadvantages occur here:
  • Elaborate seals for the rotary feedthrough of the additional devices;
  • Danger of the flying shafts of the additional devices kinking;
  • In the advanced drying stage, when the agglomerates have dried on the surface but are still plastic in the core, they tend to compress when impacted, which increases the diffusion resistance and may damage the product;
  • The end product has a very heterogeneous grain distribution;
  • Additional drive units are required in addition to the main shaft drive;
  • A grinding process must be followed.

Aufgabe der Erfindung ist es nun, eine robuste Misch-Vorrichtung für die Wärmebehandlung von Schüttgütern zu schaffen, welche die vorgenannten Nachteile vermeidet, vor allem anstelle der ZerKleinerung durch Prallwirkung eine solche durch Reinen und Schneiden ermöglicht und zusätzliche Antriebseinheiten entbehrlich macht.The object of the invention is now to provide a robust mixing device for the heat treatment of bulk goods, which avoids the aforementioned disadvantages, especially instead of crushing by impact, which is made possible by cleaning and cutting and makes additional drive units unnecessary.

Die Lösung dieser Aufgabe ist Gegenstand des Patentanspruchs 1. Vorteilhafte Weiterbildungen der Erfindung sind Gegenstand der Unteransprüche.The solution to this problem is the subject of claim 1. Advantageous further developments of the invention are the subject of the dependent claims.

Die Mahlkränze ermöglichen in-Verbindung mit den Mahlstatoren das Einstellen eines Mahlspaltes und somit eine Zwangsverkleinerung, wobei durch Vorgabe des Mahlspalts eine homogene Kornverteilung erfolgt und ein dem Prozeß nachzuschaltender Mahlvorgang entfallen kann.In conjunction with the grinding stators, the grinding rings enable the setting of a grinding gap and thus a forced reduction, whereby by specifying the grinding gap, a homogeneous grain distribution takes place and a grinding process that follows the process can be omitted.

Die Mahlkränze können auf Speichenrädern angeordnet sein. werden die Mahlkränze jedoch auf nicht durchbrochenen Scheiben angeordnet, so fördert dies den Mischvorgang, weil die Scheiben das Schüttgut verstärkt in achsialer Richtung bewegen. Die Scheiben lassen sich mit Vorteil noch beheizen, wodurch sie Trocknungszeiten verkürzen können.The grinding rings can be arranged on spoke wheels. However, if the grinding rings are arranged on non-perforated disks, this promotes the mixing process, because the disks move the bulk material increasingly in the axial direction. The panes can advantageously be heated, which can shorten drying times.

Die Mahlstatoren bestehen vorzugsweise aus im Behältergehäuse verstellbar angeordneten Zylinderflachen uder aus auf cedachten Zylinderflächen angeordneten Leisten; derart durchbrochene Mahlstatoren haben den Vorteil, für das Mischgut durchlässig zu sein, was den Mischerfolg begünstigt. Die Mahlkränze besitzen zweckmäßig am Umfang austauschbare Mahlsegmente. Da die Halterungen der Mahlstatoren nur in ihrer axialen Richtung, d.h. in radialer Richtung in bezug auf die Welle des Mischers zu bewegen sind, können sie einfach und robust ausgeführt werden und ein seitliches Abknicken ist so auszuschließen.The grinding stators preferably consist of cylinder surfaces which are adjustably arranged in the container housing or of strips arranged on covered cylinder surfaces; Grinding stators broken through in this way have the advantage of being permeable to the material to be mixed, which favors the success of the mixing. The grinding rings appropriately have exchangeable grinding segments on the circumference. Since the holders of the grinding stators only in their axial direction, i.e. can be moved in the radial direction with respect to the shaft of the mixer, they can be made simple and robust and a lateral kinking can thus be excluded.

Die zweckmäßige Anzahl der aus je einem Mahlkranz und einem Mahlstator gebildeten Mahlwerkzeugpaare richtet sich nach der Länge des Mischers, nach der Verweilzeit und den Eigenschaften des Schüttgutes. Erfindungsgemäß wird wenigstens ein solches Paar vorgesehen, vorzugsweise jedoch mehrere, aber in der Regel nicht mehr als ein solches Paar zwischen je zwei benachbarten Mischschaufeln.The appropriate number of pairs of grinding tools formed from a grinding ring and a grinding stator depends on the length of the mixer Dwell time and the properties of the bulk material. According to the invention, at least one such pair is provided, but preferably several, but generally not more than one such pair between two adjacent mixing blades.

Mit der erfindungsgemäßen Vorrichtung kann man feuchte, faserige, breiige Schüttgüter und Suspensionen unter Unterdruck, Normaldruck oder Überdruck kontinuierlich oder diskontinuierlich trocknen, reagieren, aber auch beheizen, kühlen oder mischen.With the device according to the invention, moist, fibrous, pulpy bulk goods and suspensions can be dried, reacted, but also heated, cooled or mixed under negative pressure, normal pressure or positive pressure.

Das zu behandelnde Gut wird mittels der Werkzeuge ständig durchmischt, aufgelockert und den Mahlwerkzeugen zugeführt, die das Gut in dem durch sie geformten Mahlspalt zerkleinern. Die Mahlkränze sind vorzugsweise beidseits abgeschrägt, wobei die Schrägflächen dem Mahlstator zugewandt sind, wodurch sie dem Schüttgut eine Bewegungskomponente in Richtung auf den Mahlstator vermitteln. Es sind Vorkehrungen vorgesehen, um die vom Gut abgegebene Feuchte abziehen und Reaktanten zuführen zu können.The material to be treated is constantly mixed by means of the tools, loosened and fed to the grinding tools, which shred the material in the grinding gap formed by it. The grinding rings are preferably bevelled on both sides, the inclined surfaces facing the grinding stator, as a result of which they impart a movement component to the bulk material in the direction of the grinding stator. Provisions are made to draw off the moisture released from the material and to be able to supply reactants.

Weitere Einzelheiten ergeben sich aus den in der Zeichnung als bevorzugte Ausbildung dargestellten Ansichten einer Misch-Trocknungsvorrichtung gemäß der Erfindung an Hand der nachfolgenden Beschreibung und zwar zeigen:

  • Figur 1 den Längsschnitt einer erfindungsgemäßen Vorrichtung,
  • Figur 2 den Querschnitt II-II durch die Vorrichtung aus Figur 1, und
  • Figur 3 als Detail einen abgewandelten Mahlstator in perspektivischer Ansicht.
Further details emerge from the views of a mixing-drying device according to the invention shown in the drawing as a preferred embodiment, based on the following description, namely:
  • 1 shows the longitudinal section of a device according to the invention,
  • Figure 2 shows the cross section II-II through the device of Figure 1, and
  • Figure 3 as a detail of a modified grinding stator in a perspective view.

Wie aus der Zeichnung ersichtlich wird, besteht der dargestellte Mischer für Schüttgut, insbesondere für faserige Suspensionenlaus einem trommelförmigem Behälter 1 mit über eine durchlaufende Welle 2 antreibbaren Mischschaufeln 3 mit Haltearmen 4, welche über die Welle 2 in Abstand und Winkelstellung gleichmäßig verteilt sind. Zwischen einigen dieser Mischschaufeln 3 sind zusätzlich Mahlkränze 5 zentrisch auf der rotierenden Welle 2 schräg zu ihrer Längsachse befestigt, welche bei Drehung eine Taumelbewegung ausführen. Der optimale Füllgrad des Behälters 1 mit Mischgut 6 liegt bei etwa 70 %.As can be seen from the drawing, the mixer shown for bulk material, in particular for fibrous suspensions 1, consists of a drum-shaped container 1 with mixing blades 3, which can be driven by a shaft 2 passing through, with holding arms 4, which are evenly distributed over the shaft 2 at a distance and in an angular position. Between some of these mixing blades 3, additional grinding rings 5 are attached centrally on the rotating shaft 2 at an angle to their longitudinal axis, which wobble when rotating. The optimum degree of filling of the container 1 with the mixture 6 is about 70%.

Die Mahlkränze 5 wirken an ihrer Umfangsfläche mit staionären Gegenflächen eines Mahlstators 8 zusammen, wobei vorzugsweise beide Flächen zur Ausbildung von Schneid- und Reibkanten profiliert sind. Die Gegenflächen bestehen aus am Behältergehäuse 1 verstellbar angeordneten Zylinderteilflächen, während die Umfangsfläche der Mahlkränze 5 aus austauschbaren Mahlsegmenten 7 gebildet ist. Die Gegenflächen des Mahlstators 8 sind auf von außen nachstellbaren, radial auf die Welle 2 ausgerichteten Stützen 9 so im Behälter 1 angeordnet, daß ein- oder beidseits Mischschaufeln 3 darunter durchfahren können, wie dies aus Figur 1 ersichtlich wird. Die nachstellbaren Stützen 9 für die Gegenflächen sind mittels Faltenbalg 10 abgedichtet. Die Gegenflächen des Mahlstators 8 sind im unteren Bereich des Behältergehäuses 1, vorzugsweise auf dem - in Drehrichtung D der Welle 2 gesehen - ansteigenden Teil angeordnet und machen etwa 10-50 %, vorzugsweise 25 % des von den Mischschaufeln 3 überstrichenen Umfangs des Gehäuses 1 aus.The grinding rings 5 interact on their peripheral surface with staionary counter surfaces of a grinding stator 8, both surfaces preferably being profiled to form cutting and rubbing edges. The counter surfaces consist of cylinder partial surfaces which are adjustably arranged on the container housing 1, while the peripheral surface of the grinding rings 5 is formed from interchangeable grinding segments 7. The counter surfaces of the grinding stator 8 are arranged on supports 9 which can be adjusted from the outside and are oriented radially on the shaft 2 in the container 1 in such a way that mixing blades 3 can pass underneath on one or both sides, as can be seen from FIG becomes. The adjustable supports 9 for the counter surfaces are sealed by means of bellows 10. The counter surfaces of the grinding stator 8 are arranged in the lower region of the container housing 1, preferably on the part which rises in the direction of rotation D of the shaft 2 and make up approximately 10-50%, preferably 25%, of the circumference of the housing 1 covered by the mixing blades 3 .

Die Wirkbreite der Mahlkränze 5 entspricht in etwa der axialen Ausdehnung einer Mischschaufel 3. Die Gegenflächen der Mahlstatoren 8 stehen, wie aus Figur 1 und 2 ersichtlich wird, unter der Wirkung von Federn 11. Hierbei können die nachstellbaren Stützen 9 der Mahlstatoren 8 als Federkolben ausgebildet sein, wobei die Federkolben vorzugsweise durch sogenannte Konstantfederstützen gebildet sind, wie dies hier nicht besonders dargestellt ist, so daß ein konstanter Andruck erreicht wird. Die stutzen 12,13 am Gehäuse 1 dienen dem Füllen und Entleeren.The effective width of the grinding rings 5 corresponds approximately to the axial extent of a mixing blade 3. The counter surfaces of the grinding stators 8 are, as can be seen from FIGS. 1 and 2, under the action of springs 11. The adjustable supports 9 of the grinding stators 8 can be designed as spring pistons be, the spring pistons are preferably formed by so-called constant spring supports, as is not particularly shown here, so that a constant pressure is achieved. The sockets 12, 13 on the housing 1 are used for filling and emptying.

Die für das Schüttgut undurchlässigen großflächigen Mahlstatoren gemäß Figur 1 und 2 können ersetzt werden durch Mahlstatoren gemäß Figur 3, welche für das Schüttgut durchlässig sind. Sie bestehen aus einem Tragwerk, welches aus kreisbogenförmigen Rippen 14 und diese Rippen 14 verbindenden Schneidleisten 15 besteht. Die Schneidleisten 15 sind auf ihrer dem Mahlkranz 5 zugewandten Seite mit einer profilierten Oberfläche versehen und liegen untereinander parallel verlaufend auf einer am Gehäuse des Behälters 1 zu befestigenden Stütze 9.The large-area grinding stators according to FIGS. 1 and 2, which are impermeable to the bulk material, can be replaced by grinding stators according to FIG. 3, which are permeable to the bulk material. They consist of a supporting structure which consists of circular ribs 14 and cutting strips 15 connecting these ribs 14. The cutting strips 15 are provided on their side facing the grinding ring 5 with a profiled surface and lie parallel to one another on one support 9 to be fastened to the housing of the container 1.

Claims (15)

1. Mischer für Schüttgut, insbesondere für faserige Suspensionen wie Zellulosederivate, in Form eines liegend angeordneten, trommel- oder muldenförmigen Behälters mit antreibbarem Schaufelwerk, welches an einer in Längsrichtung durch den Behälter laufenaen Welle radial angeordnete Mischschaufeln aufweist, dadurch gekennzeichnet, daß die drehbare Welle (2) zusätzlich sich mitdrehende Mahlkränze (5) in schräger Anordnung zur Längsachse der welle (2) trägt, welche bei Drehung eine Taumelbewegung ausführen und zur Bildung von Mahlspalten an ihrer äußeren Umfangsfläche mit stationär im Behälter (1) angeordneten Gegenstücken (Mahlstatoren 8) zusammenwirken.1. Mixer for bulk material, in particular for fibrous suspensions such as cellulose derivatives, in the form of a horizontally arranged, drum-shaped or trough-shaped container with a drivable blade mechanism, which has radially arranged mixing blades on a shaft running in the longitudinal direction through the container, characterized in that the rotatable shaft (2) also carries rotating wreaths (5) in an oblique arrangement to the longitudinal axis of the shaft (2), which perform a wobbling movement when rotating and to form grinding gaps on their outer circumferential surface with counterparts arranged in the container (1) (grinding stators 8) work together. 2. Mischer nach Anspruch 1, dadurch gekennzeichnet, daß die Mahlkränze (5) die Peripherie von auf der Welle (2) befestigten Speichenrädern bilden.2. Mixer according to claim 1, characterized in that the grinding rings (5) form the periphery of on the shaft (2) attached spoke wheels. 3. Mischer nach Anspruch 1, dadurch gekennzeichnet, daß die Mahlkränze (5) die Peripherie von auf der Welle (2) befestigten Scheiben bilden.3. Mixer according to claim 1, characterized in that the grinding rings (5) form the periphery of disks attached to the shaft (2). 4. Mischer nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Mahlstatoren (8) mit der äußeren Umfangsfläche der Mahlkränze (5) zusammenwirkende Zylinderteilflächen aufweisen.4. Mixer according to one of the preceding claims, characterized in that the grinding stators (8) with the outer peripheral surface of the grinding rings (5) have cooperating partial cylinder surfaces. 5. Mischer nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die Mahlstatoren (8) mit der äußeren Umfangsfläche der Mahlkränze (5) zusammenwirkende, parallel zur Längsachse der Welle (2) verlaufende und auf einer gedachten Zylinderfläche liegende Leisten (15) aufweisen.5. Mixer according to one of the preceding claims, characterized in that the grinding stators (8) with the outer peripheral surface of the grinding rings (5) cooperating, extending parallel to the longitudinal axis of the shaft (2) and lying on an imaginary cylinder surface strips (15). 6. Mischer nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß der Abstand der Mahlstatoren (8) von der Welle (2) einstellbar ist.6. Mixer according to one of the preceding claims, characterized in that the distance between the grinding stators (8) from the shaft (2) is adjustable. 7. Mischer nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die Mahlstatoren (8) auf von außen nachstellbaren Stützen (9) so im Behälter (1) angeordnet sind, daß ein- oder beidseits Mischschaufeln (3) darunter durchfahrbar sind.7. Mixer according to one of the preceding claims, characterized in that the grinding stators (8) on supports (9) which can be adjusted from the outside are arranged in the container (1) in such a way that mixing blades (3) can be passed underneath on one or both sides. 8. Mischer nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die Mahlstatoren (8) am Gehäuse des Behälters (1) auf mit Faltenbalg (10) abgedichteten Stützen (9) nachstellbar angeordnet sind.8. Mixer according to one of the preceding claims, characterized in that the grinding stators (8) on the housing of the container (1) on bellows (10) sealed supports (9) are arranged adjustable. 9. Mischer nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die Mahlstatoren (8) im unteren Bereich des Gehäuses des Behälters (1) vorzugsweise auf dem - in Drehrichtung (D) der Welle (2) gesehen - ansteigenden Teil des Behälters (1) angeordnet sind.9. Mixer according to one of the preceding claims, characterized in that the grinding stators (8) in the lower region of the housing of the container (1) preferably on the - seen in the direction of rotation (D) of the shaft (2) - rising part of the container (1 ) are arranged. 10. Mischer nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß jedem Mahlkranz (5) ein Mahlstator (8) oder mehrere, in Umfangsrichtung hintereinander angeordnete Mahlstatoren zugeordnet sind.10. Mixer according to one of the preceding claims, characterized in that each grinding ring (5) is assigned a grinding stator (8) or a plurality of grinding stators arranged one behind the other in the circumferential direction. 11. Mischer nach Anspruch 10, dadurch gekennzeichnet, daß der jeweils einem Mahlkranz (5) zugeordnete Mahlstator (8) bzw. die jeweils einem Mahlkranz (5) zugeordneten Mahlstatoren gemeinsam etwa 10-50 %, vorzugsweise etwa 25 % des von den Misbhschaufeln bestrichenen Gehäuseumfangs abdecken.11. Mixer according to claim 10, characterized in that the grinding stator (8) assigned to each grinding ring (5) or the grinding stators respectively assigned to a grinding ring (5) together about 10-50%, preferably about 25% of the coated by the Misbhschaufeln Cover the circumference of the housing. 12. Mischer nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die Mahlstatoren (8) unter Federwirkung, insbesondere mit konstantem Druck an die Mahlkränze (5) andrückbar sind.12. Mixer according to one of the preceding claims, characterized in that the grinding stators (8) can be pressed against the grinding rings (5) under spring action, in particular with constant pressure. 13. Mischer nach Anspruch 12 in Verbindung mit Anspruch 7 oder 8, dadurch gekennzeichnet, daß die nachstellbaren Stützen (9) der Mahlstatoren (8) als Federkolben ausgebildet sind.13. Mixer according to claim 12 in conjunction with claim 7 or 8, characterized in that the adjustable supports (9) of the grinding stators (8) are designed as spring pistons. 14. Mischer nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die äußere Umfangsfläche der Mahlkränze (5) und die ihr zugewandte Oberfläche der Mahlstatoren (8) zur Bildung von Schneid- und Reibkanten profiliert sind.14. Mixer according to one of the preceding claims, characterized in that the outer peripheral surface of the grinding rings (5) and the surface thereof facing the grinding stators (8) are profiled to form cutting and rubbing edges. 15. Mischer nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die Mahlkränze (5) beidseits abgeschrägt sind.15. Mixer according to one of the preceding claims, characterized in that the grinding rings (5) are chamfered on both sides.
EP81107682A 1980-10-02 1981-09-28 Mixer for bulk goods, especially for fibrous suspensions Expired EP0049450B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3037332A DE3037332C2 (en) 1980-10-02 1980-10-02 Mixer for bulk material and suspensions, especially fibrous suspensions
DE3037332 1980-10-02

Publications (3)

Publication Number Publication Date
EP0049450A2 true EP0049450A2 (en) 1982-04-14
EP0049450A3 EP0049450A3 (en) 1983-04-20
EP0049450B1 EP0049450B1 (en) 1985-04-03

Family

ID=6113479

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Application Number Title Priority Date Filing Date
EP81107682A Expired EP0049450B1 (en) 1980-10-02 1981-09-28 Mixer for bulk goods, especially for fibrous suspensions

Country Status (5)

Country Link
US (1) US4413790A (en)
EP (1) EP0049450B1 (en)
JP (1) JPS5791728A (en)
DE (2) DE3037332C2 (en)
ES (1) ES8207437A1 (en)

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US4848919A (en) * 1985-04-27 1989-07-18 Draiswerke Gmbh Pinned mill for mixers

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Also Published As

Publication number Publication date
ES505955A0 (en) 1982-10-01
DE3169701D1 (en) 1985-05-09
JPS5791728A (en) 1982-06-08
ES8207437A1 (en) 1982-10-01
US4413790A (en) 1983-11-08
DE3037332C2 (en) 1983-09-08
DE3037332A1 (en) 1982-04-15
EP0049450B1 (en) 1985-04-03
JPH0140648B2 (en) 1989-08-30
EP0049450A3 (en) 1983-04-20

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