EP0611937B1 - Mixer-dryer - Google Patents

Mixer-dryer Download PDF

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Publication number
EP0611937B1
EP0611937B1 EP93120513A EP93120513A EP0611937B1 EP 0611937 B1 EP0611937 B1 EP 0611937B1 EP 93120513 A EP93120513 A EP 93120513A EP 93120513 A EP93120513 A EP 93120513A EP 0611937 B1 EP0611937 B1 EP 0611937B1
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EP
European Patent Office
Prior art keywords
housing
mixer
drying gas
longitudinal axis
central longitudinal
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EP93120513A
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German (de)
French (fr)
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EP0611937A1 (en
Inventor
Peter Illing
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Draiswerke GmbH
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Draiswerke GmbH
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B17/00Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
    • F26B17/18Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotating helical blades or other rotary conveyors which may be heated moving materials in stationary chambers, e.g. troughs
    • F26B17/20Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by rotating helical blades or other rotary conveyors which may be heated moving materials in stationary chambers, e.g. troughs the axis of rotation being horizontal or slightly inclined
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B25/00Details of general application not covered by group F26B21/00 or F26B23/00
    • F26B25/005Treatment of dryer exhaust gases
    • F26B25/007Dust filtering; Exhaust dust filters

Definitions

  • the invention relates to a mixer-dryer according to the preamble of Claim 1.
  • DE-U-91 06 640 describes a device for conditioning powder Bulk, especially powdered sugar, known.
  • a device has a gas vent that is provided above the housing receiving a mixer.
  • the longitudinal extension the gas discharge in the direction of the axis of rotation of the mixer amounts to at most 1/4 of the length of the housing.
  • the bottom of the case is only for Part gas permeable, the gas permeable parts made of sintered material, which a drying gas can only flow through to a small extent.
  • the high delicacy the pores of the soil material are necessary for the conditioning of powdered sugar. Therefore, no strong airflow can be generated inside the housing, so that not all areas inside the housing can be reached by the air flow.
  • the conditioning device thus has the disadvantage that a strong flow of the medium to be dried is not possible and that with the drying gas flow entrained dust particles are deflected in the upper area of the housing, until they reach the filter in the gas exhaust. This creates a significant one Pressure drop outside the material bed, which is a highly effective drying of the material prevented.
  • a drying device with an air filter in which Dried goods are conveyed into a drying room via a conveyor mechanism is where the material to be dried comes to rest.
  • the drying room is up limited by a gas-permeable plate that is round. Laterally over a nozzle of drying gas is blown or sucked into the drying room. A large number of filters are provided above the gas-permeable plate; Remove dust particles from the drying gas. Because the drying gas is on the side is blown into the drying room through a nozzle, that is The material to be dried does not have the same pressure at all points. It is also Material to be dried is not evenly distributed in the drying room because there is no mixer is provided. A special spatial allocation of the filters for the pressure distribution of the gas escaping from the drying chamber does not occur. A highly effective one It is therefore not possible to dry the material to be dried.
  • an apparatus for drying explosives is known.
  • a moist material to be dried is placed on a fluidized bed in an elongated, closed housing transported.
  • a drying gas is passed through gas inlet openings blown in and escaping through gas outlet openings. Both openings are above the items to be dried.
  • the drying gas only circulates above the items to be dried and does not penetrate them.
  • the gas inlet and - outlet openings are arranged alternately side by side. A highly effective one The items to be dried are not dried.
  • the invention has for its object a mixer-dryer Generic type so that on the one hand a good mixture and on the other hand achieves a highly effective drying of the material becomes.
  • the mixer-dryer shown in the drawing has one in principle cylindrical housing 1 with a horizontal central longitudinal axis 2.
  • the housing 1 is closed at its end faces with end walls 6, 7.
  • the housing 1 is on supports 8, 9 opposite a floor foundation 10 supported.
  • Shaft bearings 11, 12 are attached to the end walls 6, 7, in which one arranged concentrically to the central longitudinal axis 2 Shaft 13 of a mixer 14 is rotatably mounted.
  • the mixer 14 is can be driven in rotation about the axis 2 by means of a motor 15 which is connected via a V-belt drive 16 is coupled to the shaft 13.
  • a material feed nozzle 18, which is on top of the housing 1 is appropriate.
  • the housing 1 opens from the interior 17 a material outlet nozzle 19th
  • Numerous mixing tools are located on the shaft 13 of the mixer 14 20, each consisting essentially of a in the region of the inner wall 21st of the housing 1 mixing blade 22 and one with the Shaft 13 connecting rod 23 exist.
  • the mixing blades 22 are relatively large and in the axial conveying direction 24 and in the direction of rotation 25 of the shaft 13 employed so that they through the feed pipe 18 supplied pourable material 26 in the direction of rotation 25 and Take along or promote in conveying direction 24.
  • In the area of the end walls 6, 7 are attached to the shaft 13 scraper tools 27, 28 by means of of which material 26 adhering to the end walls 6, 7 is stripped off becomes.
  • the mixing blades 22 overlap each other in the direction of the Axis 2 completely, so that all peripheral areas of the inner wall 21st can be swept by the mixing blades 22, whereby the formation of Dead dreams is excluded.
  • the mixer-dryer is a continuously operating push or Throwing mixer in which the material 26 by means of the mixing blades 22 each shifted in the mixed material bed or torn out of it and in a parabolic lane back into the mix bed falls behind.
  • Such push or throw mixers are with 0.5 to 10 times critical speed driven. Under the critical speed is understood the speed of the mixer 14 at which the radial outer ends of the mixing blades 22 gravitational acceleration occurs.
  • the outside Drying gas supply chambers 34, 35 attached, which - as Fig. 1 can be removed is - each over almost half the length of the housing 1 extend, namely from its end wall 6, the material feed nozzle 18 faces up to the material outlet port 19.
  • This Drying gas supply chambers 34, 35 are via perforated plates 36, 37 with the Interior 17 of the housing 1 connected.
  • the perforated plates 36, 37 are partially cylindrical formed and adapted to the inner wall 21 of the housing 1. As can be seen in FIG. 2, they extend approximately symmetrically to vertical center-symmetry plane 38 of the housing 1 by 30 ° each.
  • the Compressed gas supply boxes 34, 35 have on their perforated plates 36 and 37, respectively opposite side each have a drying gas connection 39, 40, to which a compressed gas supply line, not shown, can be connected, can be supplied by the compressed gas according to the flow direction arrow 41 is.
  • a box-shaped structure 43 is attached to the top 42 of the housing 1, which - in the conveying direction 24 - from the material feed connector 18 extends to the rear end wall 7 of the housing 1.
  • a filter box 44 is placed in which - in Conveying direction 24 one behind the other - several cylindrical filters 45 arranged are to a drying gas extraction box placed on the filter box 44 46 are connected.
  • the drying gas exhaust box 46 opens into a drying gas vent 47, through the compressed gas flows out in the outflow direction 48.
  • disagglomeration devices can be used in a known manner 49 in the form of so-called knife mills, which are provided in essentially from an attached to the outside of the housing 1 Motor 50 and a lead into the interior 17 of the housing 1, from the motor 50 high-speed shaft 51 exist on the Knives 52 are attached, by means of which material packings, so-called agglomerates can be crushed.
  • Material 26 is moist and should be dried while mixing will.
  • the compressed gas supply boxes 34, 35 and the perforated plates 36, 37 optionally heated drying gas supplied flows through the mixer 14 loosened material bed 26, and over its full length from the end wall 6 to the overflow weir 30.
  • the drying gas moistened with the moisture of the material 26 occurs in approximately the full length of the housing 1 Filter box 44, where the entrained by the drying gas Material 26 is separated by the filter 45. Passes through the filter 45 only the drying gas loaded with moisture.
  • perforated plates 36, 37 can be of different sizes. Farther the width of a perforated base 36 can vary over the length of the housing 1 change, for example, such a perforated bottom 36, 37 can be trapezoidal be trained.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)

Description

Die Erfindung betrifft einen Mischer-Trockner nach dem Oberbegriff des Anspruches 1.The invention relates to a mixer-dryer according to the preamble of Claim 1.

Bei einem derartigen aus der EP-A-0 438 772 bekannten Mischer-Trockner, der kontinuierlich betreibbar ist, sind im Bodenbereich Wandsegmente aus porösem gasdurchlässigem Material vorgesehen, durch die Druckgas zur Erzeugung eines Wirbelbettes einströmt. Dieses Druckgas kann zur Erzeugung eines gleichzeitigen Trocknungseffektes erwärmt sein. Aus der Oberseite des Gehäuses mündet ein Gas-Abzug aus. Dieser bekannte Mischer-Trockner, dessen Hauptfunktion in der Erzeugung eines Wirbelbettes zur guten Durchmischung des Materials besteht, ist für schwierige Trocknungsaufgaben nicht geeignet.In such a mixer-dryer known from EP-A-0 438 772, that can be operated continuously are wall segments in the floor area made of porous gas permeable material through which pressurized gas flows to produce a fluidized bed. This compressed gas can Generation of a simultaneous drying effect must be warmed. From the A gas vent opens at the top of the housing. This well-known Mixer-dryer, whose main function is the production of a fluidized bed to mix the material well is for difficult ones Drying tasks are not suitable.

Weiterhin ist z. B. aus DE-C-1 25 361 bekannt, zur kontinuierlichen Trocknung Mischer-Trockner einzusetzen, die als Kontakttrockner arbeiten, d. h. die Gehäusewand und gegebenenfalls die Mischwerkzeuge sind beheizt. Auch diese Mischer-Trockner sind nicht sehr wirksam.Furthermore, e.g. B. from DE-C-1 25 361, for continuous drying mixer-dryer use that work as a contact dryer, d. H. the housing wall and if necessary the mixing tools are heated. This mixer-dryer too are not very effective.

Aus DE-U-91 06 640 ist eine Vorrichtung zum Konditionieren von pulverförmigem Schüttgut, insbesondere von Puderzucker, bekannt. Eine derartige Vorrichtung weist einen Gasabzug auf, der oberhalb des ein Mischwerk aufnehmenden Gehäuses vorgesehen ist. Die Längserstreckung des Gasabzugs in Richtung der Drehachse des Mischwerks beläuft sich auf höchstens 1/4 der Gehäuselänge. Darüber hinaus ist der Boden des Gehäuses nur zum Teil gasdurchlässig, wobei die gasdurchlässigen Teile aus Sintermaterial bestehen, welche ein Trocknungsgas nur in geringem Maße durchströmen kann. Die hohe Feinheit der Poren des Bodenmaterials ist für die Konditionierung von Puderzucker erforderlich. Deshalb kann innerhalb des Gehäuses kein starker Luftstrom erzeugt werden, so daß nicht alle Bereiche im Inneren des Gehäuses vom Luftstrom erreicht werden. Die Konditioniervorrichtung weist somit den Nachteil auf, daß eine starke Durchströmung des zu trocknenden Mediums nicht möglich ist und die mit dem Trocknungsgasstrom mitgeführten Staubteilchen im oberen Bereich des Gehäuses umgelenkt werden, bis sie den Filter im Gasabzug erreichen. Hierdurch entsteht ein erheblicher Druckabfall außerhalb des Materialbettes, der eine hochwirksame Trocknung des Materials verhindert.DE-U-91 06 640 describes a device for conditioning powder Bulk, especially powdered sugar, known. Such a device has a gas vent that is provided above the housing receiving a mixer. The longitudinal extension the gas discharge in the direction of the axis of rotation of the mixer amounts to at most 1/4 of the length of the housing. In addition, the bottom of the case is only for Part gas permeable, the gas permeable parts made of sintered material, which a drying gas can only flow through to a small extent. The high delicacy the pores of the soil material are necessary for the conditioning of powdered sugar. Therefore, no strong airflow can be generated inside the housing, so that not all areas inside the housing can be reached by the air flow. The conditioning device thus has the disadvantage that a strong flow of the medium to be dried is not possible and that with the drying gas flow entrained dust particles are deflected in the upper area of the housing, until they reach the filter in the gas exhaust. This creates a significant one Pressure drop outside the material bed, which is a highly effective drying of the material prevented.

Gemäß GB-A-2 116 872 ist eine Trocknungsvorrichtung mit Luftfilter bekannt, bei der Trocknungsgut über einen Fördermechanismus in einen Trocknungsraum befördert wird, wo das Trocknungsgut zum Liegen kommt. Der Trocknungsraum ist nach oben durch eine gasdurchlässige Platte begrenzt, die rund ausgebildet ist. Seitlich wird über einen Stutzen Trocknungsgas in den Trocknungsraum eingeblasen bzw. eingesaugt. Oberhalb der gasdurchlässigen Platte ist eine Vielzahl von Filtern vorgesehen, die mitgeführte Staubpartikel aus dem Trocknungsgas entfernen. Da das Trocknungsgas seitlich durch einen Stutzen in den Trocknungsraum eingeblasen wird, wird das Trocknungsgut nicht an allen Stellen mit dem selben Druck durchströmt. Auch ist das Trocknungsgut im Trocknungsraum nicht gleichmäßig verteilt, da dort kein Mischwerk vorgesehen ist. Eine spezielle räumliche Zuordnung der Filter zur Druckverteilung des aus der Trocknungskammer entweichenden Gases erfolgt nicht. Ein hochwirksames Trocknen des Trocknungsguts ist somit nicht möglich.According to GB-A-2 116 872 a drying device with an air filter is known, in which Dried goods are conveyed into a drying room via a conveyor mechanism is where the material to be dried comes to rest. The drying room is up limited by a gas-permeable plate that is round. Laterally over a nozzle of drying gas is blown or sucked into the drying room. A large number of filters are provided above the gas-permeable plate; Remove dust particles from the drying gas. Because the drying gas is on the side is blown into the drying room through a nozzle, that is The material to be dried does not have the same pressure at all points. It is also Material to be dried is not evenly distributed in the drying room because there is no mixer is provided. A special spatial allocation of the filters for the pressure distribution of the gas escaping from the drying chamber does not occur. A highly effective one It is therefore not possible to dry the material to be dried.

Gemäß US-A-3 456 357 ist eine Vorrichtung zum Trocknen von Sprengstoff bekannt. Hierbei wird ein feuchtes Trocknungsgut auf einem Wirbelbett in einem länglichen, geschlossenen Gehäuse transportiert. Ein Trocknungsgas wird durch Gaseinlaßöffnungen eingeblasen und entweicht durch Gasauslaßöffnungen. Beide Öffnungen befinden sich oberhalb des Trocknungsgutes. Das Trocknungsgas zirkuliert dabei lediglich oberhalb des Trocknungsguts und durchdringt dieses nicht. Die Gaseinlaß- und - auslaßöffnungen sind alternierend nebeneinander angeordnet. Ein hochwirksames Trocknen des Trocknungsguts erfolgt nicht. According to US-A-3 456 357 an apparatus for drying explosives is known. Here, a moist material to be dried is placed on a fluidized bed in an elongated, closed housing transported. A drying gas is passed through gas inlet openings blown in and escaping through gas outlet openings. Both openings are above the items to be dried. The drying gas only circulates above the items to be dried and does not penetrate them. The gas inlet and - outlet openings are arranged alternately side by side. A highly effective one The items to be dried are not dried.

Der Erfindung liegt die Aufgabe zugrunde, einen Mischer-Trockner der gattungsgemäßen Art so auszugestalten, daß einerseits eine gute Mischung und andererseits eine hochwirksame Trocknung des Materials erreicht wird.The invention has for its object a mixer-dryer Generic type so that on the one hand a good mixture and on the other hand achieves a highly effective drying of the material becomes.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Anspruches 1 gelöst. Der kontinuierlich arbeitende Mischer-Trockner erzeugt aufgrund seines Antriebs als Schub- oder Wurf-Mischer ein stark aufgelockertes Materialbett, durch das über dessen im wesentlichen volle Länge Trocknungsgas, in der Regel also erwärmtes Gas, hindurchgeblasen wird, wodurch eine weitere Auflockerung und dadurch ein intensiver Kontakt zwischen Trocknungsgas und Material erreicht wird. Das Trocknungsgas wird ebenfalls über fast die volle Länge des Gehäuses abgezogen, d.h. das Materialbett wird über seine volle Länge von dem Trocknungsgas im Querstrom durchsetzt. Es tritt keine Einschnürung des Trocknungsgas-Stromes ein. Da die Filter ebenfalls im wesentlichen über die volle Länge des Gehäuses angeordnet sind, erfolgt einerseits eine zuverlässige Abtrennung von Material, das der Trocknungsgasstrom mitgenommen hat, und andererseits tritt außerhalb des Materialbettes kein nennenswerter Druckabfall ein.This object is achieved by the features of claim 1 solved. The continuously working mixer-dryer generated due to its drive as a thrust or throwing mixer a highly loosened material bed, through which over the essence full length of drying gas, usually heated gas, is blown through will, causing further loosening and thereby a intensive contact between drying gas and material is achieved. The drying gas is also almost the full length of the case subtracted, i.e. the full length of the bed of material Drying gas penetrated in cross flow. There is no constriction of the Drying gas flow. Since the filters are also essentially about the full length of the housing are arranged, on the one hand reliable separation of material that the drying gas flow entrained has, and on the other hand no occurs outside the material bed significant pressure drop.

Weitere Merkmale, Einzelheiten und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispieles anhand der Zeichnung. Es zeigt

Fig. 1
einen Mischer-Trockner im Längsschnitt in schematischer Darstellung und
Fig. 2
einen Querschnitt durch den Mischer-Trockner gemäß der Schnittlinie II-II in Fig. 1.
Further features, details and advantages of the invention will become apparent from the following description of an embodiment with reference to the drawing. It shows
Fig. 1
a mixer-dryer in longitudinal section in a schematic representation and
Fig. 2
a cross section through the mixer-dryer according to section line II-II in Fig. 1st

Der in der Zeichnung dargestellte Mischer-Trockner weist ein im Prinzip zylindrisches Gehäuse 1 mit einer horizontalen Mittel-Längs-Achse 2 auf.The mixer-dryer shown in the drawing has one in principle cylindrical housing 1 with a horizontal central longitudinal axis 2.

Das Gehäuse 1 ist an seinen Stirnseiten mit Stirnwänden 6, 7 abgeschlossen. Das Gehäuse 1 ist über Stützen 8, 9 gegenüber einem Boden-Fundament 10 abgestützt. An den Stirnwänden 6, 7 sind Wellenlager 11, 12 angebracht, in denen eine konzentrisch zur Mittel-Längs-Achse 2 angeordnete Welle 13 eines Mischwerks 14 drehbar gelagert ist. Das Mischwerk 14 ist um die Achse 2 drehantreibbar und zwar mittels eines Motors 15, der über einen Keilriementrieb 16 mit der Welle 13 gekoppelt ist.The housing 1 is closed at its end faces with end walls 6, 7. The housing 1 is on supports 8, 9 opposite a floor foundation 10 supported. Shaft bearings 11, 12 are attached to the end walls 6, 7, in which one arranged concentrically to the central longitudinal axis 2 Shaft 13 of a mixer 14 is rotatably mounted. The mixer 14 is can be driven in rotation about the axis 2 by means of a motor 15 which is connected via a V-belt drive 16 is coupled to the shaft 13.

An einem - in Fig. 1 linken - Ende des Gehäuses 1 mündet in dessen Innenraum 17 ein Material-Zuführstutzen 18, der oben auf dem Gehäuse 1 angebracht ist. Am entgegengesetzten - in Fig. 1 also rechten - Ende des Gehäuses 1 mündet aus dessen Innenraum 17 ein Material-Auslaßstutzen 19. At one - in Fig. 1 left - end of the housing 1 opens into the interior 17, a material feed nozzle 18, which is on top of the housing 1 is appropriate. At the opposite - that is to say the right in FIG. 1 - end the housing 1 opens from the interior 17 a material outlet nozzle 19th

An der Welle 13 des Mischwerks 14 befinden sich zahlreiche Mischwerkzeuge 20, die jeweils im wesentlichen aus einer im Bereich der Innenwand 21 des Gehäuses 1 befindlichen Mischschaufel 22 und einem diese mit der Welle 13 verbindenden Stange 23 bestehen. Die Mischschaufeln 22 sind relativ groß ausgebildet und in axialer Förderrichtung 24 und in Drehrichtung 25 der Welle 13 derart angestellt, daß sie das durch den Zuführstutzen 18 zugeführte schüttfähige Material 26 in Drehrichtung 25 und in Förderrichtung 24 mitnehmen bzw. fördern. Im Bereich der Stirnwände 6, 7 sind an der Welle 13 Abstreifwerkzeuge 27, 28 angebracht, mittels derer eventuell an den Stirnwänden 6, 7 anhaftendes Material 26 abgestreift wird. Die Mischschaufeln 22 überdecken einander in Richtung der Achse 2 vollständig, so daß sämtliche Umfangsbereiche der Innenwand 21 von den Mischschaufeln 22 überstrichen werden, wodurch die Bildung von Toträumen ausgeschlossen wird.Numerous mixing tools are located on the shaft 13 of the mixer 14 20, each consisting essentially of a in the region of the inner wall 21st of the housing 1 mixing blade 22 and one with the Shaft 13 connecting rod 23 exist. The mixing blades 22 are relatively large and in the axial conveying direction 24 and in the direction of rotation 25 of the shaft 13 employed so that they through the feed pipe 18 supplied pourable material 26 in the direction of rotation 25 and Take along or promote in conveying direction 24. In the area of the end walls 6, 7 are attached to the shaft 13 scraper tools 27, 28 by means of of which material 26 adhering to the end walls 6, 7 is stripped off becomes. The mixing blades 22 overlap each other in the direction of the Axis 2 completely, so that all peripheral areas of the inner wall 21st can be swept by the mixing blades 22, whereby the formation of Dead dreams is excluded.

Der Mischer-Trockner ist ein kontinuierlich arbeitender Schub- oder Wurf-Mischer, in dem das Material 26 mittels der Mischschaufeln 22 jeweils im Mischgutbett verschoben oder aber aus diesem herausgerissen wird und in einer parabelförmigen Wurfbahn wieder in das Mischgutbett zurückfällt. Derartige Schub- oder Wurf-Mischer werden mit 0,5- bis 10-facher kritischer Drehzahl angetrieben. Unter der kritischen Drehzahl wird die Drehzahl des Mischwerkes 14 verstanden, bei der an den radial äußeren Enden der Mischschaufeln 22 Erdbeschleunigung auftritt.The mixer-dryer is a continuously operating push or Throwing mixer in which the material 26 by means of the mixing blades 22 each shifted in the mixed material bed or torn out of it and in a parabolic lane back into the mix bed falls behind. Such push or throw mixers are with 0.5 to 10 times critical speed driven. Under the critical speed is understood the speed of the mixer 14 at which the radial outer ends of the mixing blades 22 gravitational acceleration occurs.

Am - in Förderrichtung 24 hinteren Ende des Innenraumes 17 - also unmittelbar benachbart zur hinteren Stirnwand 7 des Gehäuses 1 ist eine in den Material-Auslaßstutzen 19 mündende, ständig offene Auslaßöffnung 29 ausgebildet. In Förderrichtung 24 unmittelbar vor dieser Auslaßöffnung 29 ist ein Überlaufwehr 30 ausgebildet, um durch einen diesem entsprechenden Füllgrad eine ausreichende Verweilzeit des zu mischenden Materials sicherzustellen. An der Welle 13 sind zwei weitere Abstreifwerkzeuge 31, 32 angebracht, die das in Form einer Platte ausgebildete Überlaufwehr 30 an seinen beiden Seiten überstreichen und so auch Anhaftungen von zu mischendem Material verhindern. Insoweit als der Mischer bis hierher beschrieben ist, ist er allgemein bekannt und in der Praxis verbreitet. At - in the conveying direction 24 rear end of the interior 17 - that is, directly adjacent to the rear end wall 7 of the housing 1 is in the material outlet 19 opening, constantly open outlet opening 29th educated. In the conveying direction 24 immediately before this outlet opening 29 an overflow weir 30 is designed to pass through a corresponding one Degree of filling sufficient residence time of the material to be mixed ensure. On the shaft 13 there are two further scraping tools 31, 32 attached, the overflow weir 30 in the form of a plate paint on both sides and so also build-up of prevent mixing material. So far as the mixer up to here it is generally known and widely used in practice.

Im unteren Bodenbereich 33 des Gehäuses 1 sind an dessen Außenseite Trocknungsgas-Zuführkammern 34, 35 angebracht, die - wie Fig. 1 entnehmbar ist - sich jeweils über fast die halbe Länge des Gehäuses 1 erstrecken, und zwar von dessen Stirnwand 6, die dem Material-Zuführstutzen 18 zugewandt ist, bis zum Material-Auslaßstutzen 19. Diese Trocknungsgas-Zuführkammern 34, 35 sind über Lochböden 36, 37 mit dem Innenraum 17 des Gehäuses 1 verbunden. Die Lochböden 36, 37 sind teilzylindrisch ausgebildet und der Innenwand 21 des Gehäuses 1 angepaßt. Wie Fig. 2 entnehmbar ist, erstrecken sie sich etwa symmetrisch zur vertikalen Mittel-Symmetrie-Ebene 38 des Gehäuses 1 um jeweils 30°. Die Druckgas-Zuführkästen 34, 35 weisen auf ihrer den Lochböden 36 bzw. 37 entgegengesetzten Seite jeweils einen Trocknungsgas-Anschluß 39, 40 auf, an den eine nicht dargestellte Druckgas-Zuführleitung anschließbar ist, durch die Druckgas entsprechend dem Strömungsrichtungspfeil 41 zuführbar ist.In the lower bottom area 33 of the housing 1 are on the outside Drying gas supply chambers 34, 35 attached, which - as Fig. 1 can be removed is - each over almost half the length of the housing 1 extend, namely from its end wall 6, the material feed nozzle 18 faces up to the material outlet port 19. This Drying gas supply chambers 34, 35 are via perforated plates 36, 37 with the Interior 17 of the housing 1 connected. The perforated plates 36, 37 are partially cylindrical formed and adapted to the inner wall 21 of the housing 1. As can be seen in FIG. 2, they extend approximately symmetrically to vertical center-symmetry plane 38 of the housing 1 by 30 ° each. The Compressed gas supply boxes 34, 35 have on their perforated plates 36 and 37, respectively opposite side each have a drying gas connection 39, 40, to which a compressed gas supply line, not shown, can be connected, can be supplied by the compressed gas according to the flow direction arrow 41 is.

An der Oberseite 42 des Gehäuses 1 ist ein kastenförmiger Aufbau 43 angebracht, der sich - in Förderrichtung 24 - vom Material-Zuführstutzen 18 bis zur hinteren Stirnwand 7 des Gehäuses 1 erstreckt. Auf diesen kastenförmigen Aufbau 43 ist ein Filterkasten 44 aufgesetzt, in dem - in Förderrichtung 24 hintereinander - mehrere zylindrische Filter 45 angeordnet sind, die an einen auf den Filterkasten 44 aufgesetzten Trocknungsgas-Abzugkasten 46 angeschlossen sind. Der Trocknungsgas-Abzugkasten 46 mündet in einen Trocknungsgas-Abzug 47, durch den Druckgas in Ausströmrichtung 48 abströmt.A box-shaped structure 43 is attached to the top 42 of the housing 1, which - in the conveying direction 24 - from the material feed connector 18 extends to the rear end wall 7 of the housing 1. On this box-shaped structure 43, a filter box 44 is placed in which - in Conveying direction 24 one behind the other - several cylindrical filters 45 arranged are to a drying gas extraction box placed on the filter box 44 46 are connected. The drying gas exhaust box 46 opens into a drying gas vent 47, through the compressed gas flows out in the outflow direction 48.

Wie Fig. 2 entnehmbar ist, können in bekannter Weise Desagglomeriereinrichtungen 49 in Form sogenannter Messermühlen vorgesehen sein, die im wesentlichen aus einem an der Außenseite des Gehäuses 1 angebrachten Motor 50 und einer in den Innenraum 17 des Gehäuses 1 hindurchgeführten, vom Motor 50 hochtourig antreibbaren Welle 51 bestehen, auf der Messer 52 angebracht sind, mittels derer Materialzusammenpackungen, sogenannte Agglomerate, zerkleinert werden können.As can be seen in FIG. 2, disagglomeration devices can be used in a known manner 49 in the form of so-called knife mills, which are provided in essentially from an attached to the outside of the housing 1 Motor 50 and a lead into the interior 17 of the housing 1, from the motor 50 high-speed shaft 51 exist on the Knives 52 are attached, by means of which material packings, so-called agglomerates can be crushed.

Das durch den Material-Zuführstutzen 18 in den Innenraum 17 zugeführte Material 26 ist feucht und soll unter gleichzeitigem Mischen getrocknet werden. Hierzu wird über die Druckgas-Zuführkästen 34, 35 und die Lochböden 36, 37 gegebenenfalls erwärmtes Trocknungsgas zugeführt, das das mittels des Mischwerks 14 aufgelockerte Materialbett 26 durchströmt, und zwar über dessen volle Länge von der Stirnwand 6 bis zum Überlaufwehr 30. Das mit der Feuchtigkeit des Materials 26 befeuchtete Trocknungsgas tritt in den sich über annähernd die volle Länge des Gehäuses 1 erstreckenden Filterkasten 44 ein, wo das vom Trocknungsgas mitgenommene Material 26 durch die Filter 45 abgetrennt wird. Durch die Filter 45 tritt nur das mit der Feuchtigkeit beladene Trocknungsgas aus. Der einerseits durch das Mischwerk 14 und andererseits durch den über annähernd die volle Gehäuselänge eintretenden Gasstrom bewirkte Auflockern bzw. Fluidisieren des Materialbettes führt zu einem äußerst intensiven Kontakt von Trocknungsgas und Material 26 und damit zu einem äußerst intensiven Trocknungsvorgang. Gleichzeitig werden eventuell notwendige Mischvorgänge ausgeführt.That fed through the material supply nozzle 18 into the interior 17 Material 26 is moist and should be dried while mixing will. For this purpose, the compressed gas supply boxes 34, 35 and the perforated plates 36, 37 optionally heated drying gas supplied flows through the mixer 14 loosened material bed 26, and over its full length from the end wall 6 to the overflow weir 30. The drying gas moistened with the moisture of the material 26 occurs in approximately the full length of the housing 1 Filter box 44, where the entrained by the drying gas Material 26 is separated by the filter 45. Passes through the filter 45 only the drying gas loaded with moisture. The one through the mixer 14 and on the other hand through the approximately Gas flow entering the full length of the housing causes loosening or fluidization of the material bed leads to an extremely intensive contact of Drying gas and material 26 and thus an extremely intense Drying process. At the same time, any necessary mixing processes executed.

Wenn mehrere Zuführkästen 34, 35 vorgesehen sind, dann können die ihnen zugeordneten Lochböden 36, 37 unterschiedlich groß sein. Weiterhin kann sich die Breite eines Lochbodens 36 über der Länge des Gehäuses 1 ändern, beispielsweise kann ein solcher Lochboden 36, 37 also trapezförmig ausgebildet sein.If several feed boxes 34, 35 are provided, then they can assigned perforated plates 36, 37 can be of different sizes. Farther the width of a perforated base 36 can vary over the length of the housing 1 change, for example, such a perforated bottom 36, 37 can be trapezoidal be trained.

Claims (7)

  1. A mixer drier comprising a stationary, fundamentally cylindrical housing (1), in which a mixing unit (14) continuously drivable in rotation about its central longitudinal axis is disposed, which at one end referred to the central longitudinal axis, is provided with a material supply connector (18) and at the opposite end seen in the conveying direction and referred to the central longitudinal axis, with a material outlet connector (19), which, in its interior space (17), possesses a bed of material (26) to be dried and, in its bottom area (33), is provided with at least one drying gas supply chamber (34, 35) which extends over a substantial part of the length of the housing (1) and is joined to a drying gas supply (39, 40) and connected with the interior space (17) of the housing (1) by way of a gas-permeable bottom (36, 37), and which, in the vicinity of its top side (42) is provided with a gas outlet, characterized in that the gas outlet is an approximately cuboidal filter box (44) which extends at least over a substantial part of the length of the housing (1) in the direction of the central longitudinal axis and is connected with the latter's interior space (17) and in which several filters (45) are disposed one after the other over the length of the housing (1), the filters (45) being connected with a drying gas outlet (47).
  2. A mixer drier according to claim 1, characterized in that the filters (45) are oblong and disposed approximately vertically and crosswise to the central longitudinal axis (2) of the mixing unit (14).
  3. A mixer drier according to one of the claims 1 to 2, characterized in that it is a pusher or a shaker mixer.
  4. A mixer drier according to one of claims 1 to 3, characterized in that several drying gas supply chambers (34, 35) are provided one after the other in the conveying direction (24).
  5. A mixer drier according to one of claims 1 to 4, characterized in that the at least one drying gas supply chamber (34, 35) is connected with the interior space (17) of the housing (1) by way of a bottom (36, 37) in the form of a perforated bottom.
  6. A mixer drier according to one of claims 1 to 5, characterized in that at least one deagglomeration device (49) is provided.
  7. A mixer drier according to one of claims 1 to 6, characterized in that the gas-permeable bottom in the form of at least one perforated bottom (36, 37) extends over 40° to 90°.
EP93120513A 1993-02-15 1993-12-20 Mixer-dryer Expired - Lifetime EP0611937B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9302136U 1993-02-15
DE9302136U DE9302136U1 (en) 1993-02-15 1993-02-15 Mixer-dryer

Publications (2)

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EP0611937A1 EP0611937A1 (en) 1994-08-24
EP0611937B1 true EP0611937B1 (en) 1998-10-14

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EP (1) EP0611937B1 (en)
DE (2) DE9302136U1 (en)
ES (1) ES2123610T3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7132564B2 (en) 2004-10-07 2006-11-07 Bayer Materialscience Ag Process for preparing cyclic ketones

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2712076B1 (en) * 1993-11-04 1996-01-26 Gwozdz Eugene Dryer for wet products, especially sludge from sewage treatment plants.
NO322684B1 (en) 2001-05-16 2006-11-27 Stord Bartz As Method and apparatus for drying glue-containing materials
ES2192980B2 (en) * 2002-01-16 2006-06-01 Baucis, S.A. MICROWAVE-DRYER-REACTOR MIXER.
EP1406054B1 (en) * 2002-10-04 2006-11-22 Edwin Eisenegger Apparatus for treating bulk material
NO339253B1 (en) * 2013-05-22 2016-11-21 Multivector As A method and system for treating at least one substance to a dried, fragmented, swirled final product
CA2913125C (en) 2013-05-22 2021-11-09 Multivector As A method, a system and devices for processing at least one substance into a dried, fragmented, fluidized end product
NO339254B1 (en) * 2013-05-22 2016-11-21 Multivector As Apparatus for swirling and drying at least one fragmented substance

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE174842C (en) *
DE125361C (en) * 1899-10-20 1901-11-23
US1642469A (en) * 1926-07-13 1927-09-13 Compton J Tucker Apparatus for drying hay or other products
US2639515A (en) * 1948-12-16 1953-05-26 Ruth Rand Simon Drier and method
US3456357A (en) * 1968-02-05 1969-07-22 Commercial Solvents Corp Process for continuous automated vibrational drying of explosives and apparatus
HU184671B (en) * 1979-03-21 1984-09-28 Richter Gedeon Vegyeszet Apparatus for drying and granulating wet pastelike and/or fusible materials
DE3024710C2 (en) * 1980-06-30 1982-06-09 Helmut 4740 Oelde Haupt Dryer for pourable goods
IT8221133V0 (en) * 1982-03-15 1982-03-15 Essiccatoi S P A Caleppio Di S DRYER-FILTER UNIT WITH DEVICE FOR CLEANING FILTERS.
JPS58168880A (en) * 1982-03-30 1983-10-05 株式会社栗本鉄工所 Conduction heat receiving type agitating drier
DE4002099A1 (en) * 1990-01-25 1991-08-01 Draiswerke Gmbh MIXER
DE9106640U1 (en) * 1991-05-30 1991-07-18 Dietrich Reimelt KG, 6074 Rödermark Device for conditioning powdered bulk material

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7132564B2 (en) 2004-10-07 2006-11-07 Bayer Materialscience Ag Process for preparing cyclic ketones

Also Published As

Publication number Publication date
DE9302136U1 (en) 1993-04-01
ES2123610T3 (en) 1999-01-16
EP0611937A1 (en) 1994-08-24
DE59309062D1 (en) 1998-11-19

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