EP2026667A1 - Flash dryer for drying a fibrous tobacco product - Google Patents

Flash dryer for drying a fibrous tobacco product

Info

Publication number
EP2026667A1
EP2026667A1 EP07725547A EP07725547A EP2026667A1 EP 2026667 A1 EP2026667 A1 EP 2026667A1 EP 07725547 A EP07725547 A EP 07725547A EP 07725547 A EP07725547 A EP 07725547A EP 2026667 A1 EP2026667 A1 EP 2026667A1
Authority
EP
European Patent Office
Prior art keywords
tobacco
feed
tube
feed pipe
drying
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP07725547A
Other languages
German (de)
French (fr)
Inventor
Torsten Grigutsch
Ullrich Bartsch
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.)
Koerber Technologies GmbH
Original Assignee
Hauni Maschinenbau GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hauni Maschinenbau GmbH filed Critical Hauni Maschinenbau GmbH
Publication of EP2026667A1 publication Critical patent/EP2026667A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B3/00—Preparing tobacco in the factory
    • A24B3/04—Humidifying or drying tobacco bunches or cut tobacco
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B3/00—Preparing tobacco in the factory
    • A24B3/12—Steaming, curing, or flavouring tobacco
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B3/00—Preparing tobacco in the factory
    • A24B3/18—Other treatment of leaves, e.g. puffing, crimpling, cleaning
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
    • F26B17/10—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle, e.g. pneumatic, flash, vortex or entrainment dryers
    • F26B17/101—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle, e.g. pneumatic, flash, vortex or entrainment dryers the drying enclosure having the shape of one or a plurality of shafts or ducts, e.g. with substantially straight and vertical axis
    • F26B17/103—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by fluid currents, e.g. issuing from a nozzle, e.g. pneumatic, flash, vortex or entrainment dryers the drying enclosure having the shape of one or a plurality of shafts or ducts, e.g. with substantially straight and vertical axis with specific material feeding arrangements, e.g. combined with disintegrating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B2200/00—Drying processes and machines for solid materials characterised by the specific requirements of the drying good
    • F26B2200/22—Tobacco leaves

Definitions

  • the invention relates to a current dryer for drying a fibrous tobacco product according to the preamble of claim I 3 and a corresponding drying method.
  • Such a current dryer for drying tobacco is known from EP 0 895 721 B1, wherein in the feed tube, a rotating conditioning roll is arranged with nozzle openings for generating water vapor or water jets for steaming or humidifying tobacco flowing through the feed pipe.
  • a rotating conditioning roll is arranged with nozzle openings for generating water vapor or water jets for steaming or humidifying tobacco flowing through the feed pipe.
  • the steaming or moistening of the tobacco for example, for the sake of influencing the taste, may be unfavorable.
  • the mechanical action of the conditioning roller on the tobacco for specific types of tobacco, for example expanded tobacco can lead to a reduction in quality.
  • a non-generic current dryer with a feed tube without conditioner is known from EP 0 969 749 B1.
  • the object of the present invention is to provide a current dryer with variable possibilities for handling the tobacco before it is introduced into the transport tube, wherein in particular an unfavorable effect of the conditioning device or conditioning medium on the tobacco is to be avoided.
  • the invention solves this problem by the means of claims 1 and 6. Due to the inventively provided further feed pipe, for example, an independent feed under other conditions than in the equipped with the conditioning device feed pipe done. Through the further feed pipe, the possibilities for the treatment of the tobacco can be extended prior to introduction into the transport tube.
  • the further feed tube may preferably be free of a conditioning device, whereby an unfavorable introduction of effect of a conditioning or conditioning medium can be avoided on certain types of tobacco.
  • either the conditioning equipped feed tube may be used if conditioning of the tobacco is desired by means of the conditioner, preferably closing the further feed tube, or the further feed tube may be used if conditioned the tobacco is not required or disadvantageous by means of the conditioning device, in which case the other feed tube is preferably closed.
  • both feed tubes may be used to feed the transport tube with tobacco in parallel.
  • the moist tobacco for example ribbed section
  • the process gas is deprived of energy in the form of temperature by the already registered tobacco due to its drying.
  • Tobacco with a lower moisture content, for example leaf cut, compared to the first tobacco introduced can be introduced through the downstream feed tube.
  • the conditioning medium used in the conditioning device may in particular be water vapor, preferably saturated steam, in order to achieve an optimum expansion effect, water, or a mixture thereof.
  • the conditioning effect is not limited to the expansion of tobacco.
  • the steam also other effects can be achieved in addition to or instead of the expansion effect, for example, drying the tobacco by using superheated steam or humidifying the tobacco by using moistened steam or water.
  • FIG. 2 shows a schematic representation of a current dryer according to a second embodiment in the region of the tobacco inlet
  • FIG 3 shows a schematic representation of a current dryer according to a third embodiment in the region of the tobacco inlet.
  • the flow dryer 10 includes a transport tube 1 1 for a hot gas stream 12, which is closed to form a circuit in itself.
  • the flow of the hot gas 12 is maintained by means of a compressor 13 arranged in the transport tube 11.
  • known means for heating the hot gas stream 12 and for supplying fresh heated gas in the transport tube 1 1 and for discharging spent gas from the transport tube 1 1 is provided.
  • a first feed tube 15 is provided, which opens into the transport tube 1 1, so that the mouth of the first feed tube 15 into the transport tube 1 1 a first tobacco inlet opening 14 in the transport tube 1 first forms.
  • a rotating roller 17 is arranged, which is referred to as Winnowerwalze.
  • the axis of rotation of the roller 17 is arranged substantially perpendicular to the flow direction of the tobacco through the feed pipe 15. In the figures, the axis of rotation of the roller 17 is arranged, for example, perpendicular to the plane of the paper.
  • the rotation roller 17 includes a hollow shaft 18 which is driven to rotate about the rotation axis.
  • the roller 17 preferably comprises axial rows of tine-shaped radial pins 19 which form rotating rakes in order to loosen or singulate the tobacco product 13 by mechanical action.
  • outlet nozzles are preferably distributed over the circumference and the width of the hollow shaft 18.
  • the hollow shaft 18 is acted upon from the inside with water vapor, which exits through the outlet nozzles in the form of water vapor jets 20, so that due to the rotation of the rotating roller 17 results in a rotating water vapor jet curtain.
  • the tobacco material 16 When using saturated steam, the tobacco material 16 is expanded as it passes through the radiation curtain. Further details can be taken from EP 0 895 721 B1. Alternatively or in addition to the outlet nozzles in the hollow shaft 18, outlet nozzles can be provided in the pins 19, which are then expediently designed as hollow pins.
  • the rotary roller 17 can be preceded by a rotary valve 21 with a cellular wheel 22.
  • a rotary feeder may be provided behind the rotation roller 17 to form a treatment space between the rotary valves.
  • the feed tube 15 comprises chamber-like widened sections for the rotation roller 17 and the cellular wheel 22.
  • the term “tube” is therefore by no means limited to a specific cross-sectional shape or to a fixed tube cross-section.
  • the tobacco material 16 enters the transport tube 1 1 a.
  • the hot gas stream 12 receives the incoming tobacco material 16 and transports it in the direction of the arrow through the drying tube 18. After passing through a vertical drying section 24, the dried tobacco is separated from the hot gas stream 12 in a separator 23.
  • a downstream additional feed pipe 25 is arranged downstream of the first feed pipe 15 in the flow direction. If necessary, a rotary feeder 26, but no conditioning device corresponding to the rotary roller 17, is provided in the second feed tube 25.
  • the mouth of the downstream feed pipe 25 is closed by means of a shut-off element 27, for example a slide.
  • Tobacco 16 is therefore introduced only through the first feed tube 15 in the dryer 10. This operating mode is particularly advantageous when the conditioning device 17 is used for conditioning the tobacco 16.
  • the first feed tube 15 may be provided by means of a corresponding obturator 28 indicated by dashed lines, for example a slide for closing the first inlet opening 14, and the downstream feed pipe 25 can be opened by opening the obturator 27 to make a supply of dashed tobacco tobacco 16 in the dryer 10 through the further feed pipe 25, bypassing the conditioning device 17.
  • both feed tubes 15, 25 may be opened in FIG. 1 to provide simultaneous feed through both feed tubes 15, 25.
  • This may be useful, for example, to introduce more moist tobacco 16 through upstream feed tube 15 and less wet tobacco 16 through downstream feed tube 25, such that the more moist tobacco on the route between the two feed tubes provides additional drying compared to the less moist one Tobacco learns.
  • the embodiment according to FIG. 2 differs from that according to FIG. 1 in that, instead of a downstream further feed pipe, a further feed pipe 29 arranged in the flow direction of the hot gas 12 is connected to the transport pipe 11. If necessary, a rotary feeder 30, but preferably no conditioning device corresponding to the rotary roller 17, is provided in the further feed tube 29.
  • the upstream feed pipe 29 is used to feed the dryer 10. In other modes, alternatively or additionally, the first feed tube 15 may be used to feed the dryer 10. If the upstream feed pipe 25 is not used, it is expediently closed by means of an associated obturator 31.
  • FIG. 3 illustrates that the invention is not limited to two feed tubes.
  • the invention is not limited to a conditioning device in the form of a rotatable roller. It may, for example, also be a space-fixed conditioning device, as known from DE-A 102004018879 act.

Abstract

The invention relates to a flash dryer for drying a fibrous tobacco product (16), having a transporting tube (11) through which a hot gas (12) flows, and having a charging tube (15) which opens out into the transporting tube (11) and is intended for charging the transporting tube (11) with tobacco (16), the charging tube (15) containing a conditioning means (17) which dispenses a conditioning medium (20), and the flash dryer is distinguished in that it has at least one further charging tube (25; 29) which opens out into the transporting tube (11) and is intended for charging the transporting tube (11) with tobacco (16). The invention also relates to a corresponding drying process.

Description

Stromtrockner zum Trocknen eines faserförmigen Tabakprodukts A stream dryer for drying a fibrous tobacco product
Die Erfindung betrifft einen Stromtrockner zum Trocknen eines faserförmigen Tabakprodukts nach dem Oberbegriff von Anspruch I 3 und ein entsprechendes Trocknungs verfahren .The invention relates to a current dryer for drying a fibrous tobacco product according to the preamble of claim I 3 and a corresponding drying method.
Ein solcher Stromtrockner zum Trocknen von Tabak ist aus EP 0 895 721 Bl bekannt, wobei in dem Beschickungsrohr eine rotierende Konditionierwalze mit Düsenöffnungen zum Erzeugen von Wasserdampf- oder Wasserstrahlen zum Bedampfen bzw. Befeuchten von durch das Beschickungsrohr strömendem Tabak angeordnet ist. Für bestimmte Tabakarten kann das Bedampfen bzw. Befeuchten des Tabaks beispielsweise aus Grün- den einer Geschmacksbeeinflussung ungünstig sein. Zudem kann die mechanische Einwirkung der Konditionierwalze auf den Tabak für spezielle Tabakarten, zum Beispiel expandierten Tabak, zu einer Qualitätsverminderung führen.Such a current dryer for drying tobacco is known from EP 0 895 721 B1, wherein in the feed tube, a rotating conditioning roll is arranged with nozzle openings for generating water vapor or water jets for steaming or humidifying tobacco flowing through the feed pipe. For certain types of tobacco, the steaming or moistening of the tobacco, for example, for the sake of influencing the taste, may be unfavorable. In addition, the mechanical action of the conditioning roller on the tobacco for specific types of tobacco, for example expanded tobacco, can lead to a reduction in quality.
Ein nicht gattungsgemäßer Stromtrockner mit einem Beschickungsrohr ohne Konditio- niereinrichtung ist aus EP 0 969 749 Bl bekannt.A non-generic current dryer with a feed tube without conditioner is known from EP 0 969 749 B1.
Die Aufgabe der vorliegenden Erfindung besteht darin, einen Stromtrockner mit variablen Möglichkeiten zur Handhabung des Tabaks vor dem Einleiten in das Transportrohr bereitzustellen, wobei insbesondere eine ungünstige Einwirkung der Konditionierein- richtung bzw. von Konditioniermedium auf den Tabak vermieden werden soll.The object of the present invention is to provide a current dryer with variable possibilities for handling the tobacco before it is introduced into the transport tube, wherein in particular an unfavorable effect of the conditioning device or conditioning medium on the tobacco is to be avoided.
Die Erfindung löst diese Aufgabe mit den Mitteln der Ansprüche 1 und 6. Aufgrund des erfindungsgemäß vorgesehenen weiteren Beschickungsrohrs kann zum Beispiel eine unabhängige Beschickung unter anderen Bedingungen als in dem mit der Konditionier- einrichtung ausgerüsteten Beschickungsrohr erfolgen. Durch das weitere Beschickungsrohr können die Möglichkeiten zur Behandlung des Tabaks vor der Einleitung in das Transportrohr erweitert werden. Insbesondere kann das weitere Beschickungsrohr vorzugsweise frei von einer Konditioniereinrichtung sein, wodurch eine ungünstige Ein- wirkung einer Konditioniereinrichtung bzw. von Konditioniermedium auf bestimmte Tabaksorten vermieden werden kann.The invention solves this problem by the means of claims 1 and 6. Due to the inventively provided further feed pipe, for example, an independent feed under other conditions than in the equipped with the conditioning device feed pipe done. Through the further feed pipe, the possibilities for the treatment of the tobacco can be extended prior to introduction into the transport tube. In particular, the further feed tube may preferably be free of a conditioning device, whereby an unfavorable introduction of effect of a conditioning or conditioning medium can be avoided on certain types of tobacco.
In einer Betriebsart kann wahlweise, beispielsweise je nach Tabaksorte, entweder das mit Konditioniereinrichtung ausgerüstete Beschickungsrohr verwendet werden, wenn Konditionierung des Tabaks mittels der Konditioniereinrichtung gewünscht ist, wobei das weitere Beschickungsrohr vorzugsweise verschlossen wird, oder es kann das weitere Beschickungsrohr verwendet werden, wenn eine Konditionierung des Tabaks mittels der Konditioniereinrichtung nicht erforderlich oder nachteilig ist, wobei in diesem Fall das andere Beschickungsrohr vorzugsweise verschlossen wird.In one mode of operation, optionally, for example, depending on the type of tobacco, either the conditioning equipped feed tube may be used if conditioning of the tobacco is desired by means of the conditioner, preferably closing the further feed tube, or the further feed tube may be used if conditioned the tobacco is not required or disadvantageous by means of the conditioning device, in which case the other feed tube is preferably closed.
In einer anderen Betriebsart können beide Beschickungsrohre zur parallelen bzw. gleichzeitigen Beschickung des Transportrohrs mit Tabak verwendet werden. Dies kann beispielsweise dann vorteilhaft sein, wenn Tabak mit unterschiedlichen Feuchten vor- liegt. In diesem Fall wird der feuchtere Tabak, beispielsweise Rippenschnitt, vorzugsweise durch das in Strömungsrichtung erste Beschickungsrohr zugeführt. Im Transportrohr wird dem Prozessgas Energie in Form von Temperatur durch den bereits eingetragenen Tabak infolge dessen Abtrocknung entzogen. Durch das stromabwärts angeordnete weitere Beschickungsrohr kann Tabak mit im Vergleich zu dem zuerst eingetrage- nen Tabak niedrigerer Feuchte, beispielsweise Blattschnitt, eingetragen werden.In another mode, both feed tubes may be used to feed the transport tube with tobacco in parallel. This may be advantageous, for example, when tobacco with different moistures is present. In this case, the moist tobacco, for example ribbed section, is preferably fed through the first feed tube in the direction of flow. In the transport tube, the process gas is deprived of energy in the form of temperature by the already registered tobacco due to its drying. Tobacco with a lower moisture content, for example leaf cut, compared to the first tobacco introduced can be introduced through the downstream feed tube.
Das in der Konditioniereinrichtung verwendete Konditioniermedium kann insbesondere Wasserdampf, vorzugsweise Sattdampf, um eine optimale Expansionswirkung zu erzielen, Wasser, oder eine Mischung davon sein. Die Konditionierwirkung ist nicht auf die Expansion von Tabak beschränkt. Mittels des Wasserdampfes können auch weitere Wirkungen zusätzlich oder anstelle der Expansionswirkung erreicht werden, beispielsweise Trocknung des Tabaks durch Verwendung von überhitztem Dampf oder Auf- feuchtung des Tabaks durch Verwendung von angefeuchtetem Dampf oder Wasser.The conditioning medium used in the conditioning device may in particular be water vapor, preferably saturated steam, in order to achieve an optimum expansion effect, water, or a mixture thereof. The conditioning effect is not limited to the expansion of tobacco. By means of the steam also other effects can be achieved in addition to or instead of the expansion effect, for example, drying the tobacco by using superheated steam or humidifying the tobacco by using moistened steam or water.
Weitere vorteilhafte Merkmale gehen aus den Unteransprüchen und der folgenden Beschreibung vorteilhafter Ausführungsbeispiele unter Bezugnahme auf die beigefügten Zeichnungen hervor. Es zeigen: Fig. 1 : eine schematische Darstellung eines Stromtrockners in einer ersten Ausführungsform;Further advantageous features will become apparent from the dependent claims and the following description of advantageous embodiments with reference to the accompanying drawings. Show it: 1 shows a schematic representation of a current dryer in a first embodiment;
Fig. 2: eine schematische Darstellung eines Stromtrockners gemäß einer zweiten Aus- führungsform im Bereich des Tabakeinlasses; und2 shows a schematic representation of a current dryer according to a second embodiment in the region of the tobacco inlet; and
Fig. 3: eine schematische Darstellung eines Stromtrockners gemäß einer dritten Aus- führungsform im Bereich des Tabakeinlasses.3 shows a schematic representation of a current dryer according to a third embodiment in the region of the tobacco inlet.
Der Stromtrockner 10 umfasst ein Transportrohr 1 1 für einen Heißgasstrom 12, das zur Bildung eines Kreislaufs in sich geschlossen ist. Die Strömung des Heißgases 12 wird mittels eines in dem Transportrohr 11 angeordneten Verdichters 13 aufrechterhalten. Es sind nicht gezeigte, bekannte Einrichtungen zum Erhitzen des Heißgasstroms 12 bzw. zum Zuführen frischen erhitzten Gases in das Transportrohr 1 1 und zum Abführen von verbrauchtem Gas aus dem Transportrohr 1 1 vorgesehen.The flow dryer 10 includes a transport tube 1 1 for a hot gas stream 12, which is closed to form a circuit in itself. The flow of the hot gas 12 is maintained by means of a compressor 13 arranged in the transport tube 11. There are not shown, known means for heating the hot gas stream 12 and for supplying fresh heated gas in the transport tube 1 1 and for discharging spent gas from the transport tube 1 1 is provided.
Zur Beschickung des Transportrohrs 1 1 mit zu trocknendem Tabak 16 ist ein erstes Beschickungsrohr 15 vorgesehen, das in das Transportrohr 1 1 mündet, so dass die Mündung des ersten Beschickungsrohrs 15 in das Transportrohr 1 1 eine erste Tabakeinlass- Öffnung 14 in dem Transportrohr 1 1 bildet. In dem ersten Beschickungsrohr 15 ist eine rotierende Walze 17 angeordnet, die als Winnowerwalze bezeichnet wird. Die Rotationsachse der Walze 17 ist im wesentlichen senkrecht zu der Durchflussrichtung des Tabaks durch das Beschickungsrohr 15 angeordnet. In den Figuren ist die Rotationsachse der Walze 17 beispielsweise senkrecht zu der Papierebene angeordnet.To feed the transport tube 1 1 to be dried tobacco 16, a first feed tube 15 is provided, which opens into the transport tube 1 1, so that the mouth of the first feed tube 15 into the transport tube 1 1 a first tobacco inlet opening 14 in the transport tube 1 first forms. In the first feed tube 15, a rotating roller 17 is arranged, which is referred to as Winnowerwalze. The axis of rotation of the roller 17 is arranged substantially perpendicular to the flow direction of the tobacco through the feed pipe 15. In the figures, the axis of rotation of the roller 17 is arranged, for example, perpendicular to the plane of the paper.
Die Rotationswalze 17 umfasst eine Hohlwelle 18, die zur Drehung um die Rotationsachse angetrieben wird. Die Walze 17 umfasst vorzugsweise axiale Reihen zinkenför- miger radialer Stifte 19, die rotierende Rechen bilden, um das Tabakprodukt 13 durch mechanische Einwirkung aufzulockern bzw. zu vereinzeln. Weiterhin sind vorzugs- weise Austrittsdüsen über den Umfang und die Breite der Hohlwelle 18 verteilt angeordnet. Die Hohlwelle 18 ist von innen mit Wasserdampf beaufschlagt, der durch die Austrittsdüsen in Form von Wasserdampfstrahlen 20 austritt, so dass sich aufgrund der Drehung der Rotationswalze 17 ein rotierender Wasserdampfstrahlenvorhang ergibt. - A -The rotation roller 17 includes a hollow shaft 18 which is driven to rotate about the rotation axis. The roller 17 preferably comprises axial rows of tine-shaped radial pins 19 which form rotating rakes in order to loosen or singulate the tobacco product 13 by mechanical action. Furthermore, outlet nozzles are preferably distributed over the circumference and the width of the hollow shaft 18. The hollow shaft 18 is acted upon from the inside with water vapor, which exits through the outlet nozzles in the form of water vapor jets 20, so that due to the rotation of the rotating roller 17 results in a rotating water vapor jet curtain. - A -
Bei Verwendung von Sattdampf wird das Tabakmaterial 16 beim Durchtreten durch den Strahlenvorhang expandiert. Weitere Details können aus EP 0 895 721 Bl entnommen werden. Alternativ oder zusätzlich zu den Austrittsdüsen in der Hohlwelle 18 können Austrittsdüsen in den Stiften 19, die dann zweckmäßigerweise als Hohlstifte ausgeführt sind, vorgesehen sein.When using saturated steam, the tobacco material 16 is expanded as it passes through the radiation curtain. Further details can be taken from EP 0 895 721 B1. Alternatively or in addition to the outlet nozzles in the hollow shaft 18, outlet nozzles can be provided in the pins 19, which are then expediently designed as hollow pins.
Der Rotationswalze 17 kann wie in den Figuren gezeigt eine Zellenradschleuse 21 mit einem Zellenrad 22 vorgelagert sein. In einer nicht gezeigten Ausführungsform kann eine nicht gezeigte Zellenradschleuse hinter der Rotations walze 17 vorgesehen sein, um zwischen den Zellenradschleusen einen Behandlungsraum zu bilden.As shown in the figures, the rotary roller 17 can be preceded by a rotary valve 21 with a cellular wheel 22. In one embodiment, not shown, a rotary feeder, not shown, may be provided behind the rotation roller 17 to form a treatment space between the rotary valves.
Wie aus Fig. 1 ersichtlich, umfasst das Beschickungsrohr 15 kammerartige erweiterte Abschnitte für die Rotationswalze 17 und das Zellenrad 22. Der Begriff „Rohr" ist daher keinesfalls auf eine bestimmte Querschnittsform oder auf einen festen Rohrquer- schnitt beschränkt.As can be seen from FIG. 1, the feed tube 15 comprises chamber-like widened sections for the rotation roller 17 and the cellular wheel 22. The term "tube" is therefore by no means limited to a specific cross-sectional shape or to a fixed tube cross-section.
Durch die Einlassöffnung 14 tritt das Tabakmaterial 16 in das Transportrohr 1 1 ein. Der Heißgasstrom 12 nimmt das eintretende Tabakmaterial 16 auf und transportiert es in Pfeilrichtung durch das Trocknungsrohr 18. Nach Durchlaufen einer vertikalen Trock- nungsstrecke 24 wird der getrocknete Tabak in einem Abscheider 23 vom Heißgasstrom 12 getrennt.Through the inlet opening 14, the tobacco material 16 enters the transport tube 1 1 a. The hot gas stream 12 receives the incoming tobacco material 16 and transports it in the direction of the arrow through the drying tube 18. After passing through a vertical drying section 24, the dried tobacco is separated from the hot gas stream 12 in a separator 23.
In der in Fig. 1 gezeigten Ausführungsform ist in Strömungsrichtung hinter dem ersten Beschickungsrohr 15 ein nachgeordnetes weiteres Beschickungsrohr 25 angeordnet. In dem zweiten Beschickungsrohr 25 ist gegebenenfalls eine Zellenradschleuse 26, jedoch keine der Rotationswalze 17 entsprechende Konditioniereinrichtung vorgesehen.In the embodiment shown in FIG. 1, a downstream additional feed pipe 25 is arranged downstream of the first feed pipe 15 in the flow direction. If necessary, a rotary feeder 26, but no conditioning device corresponding to the rotary roller 17, is provided in the second feed tube 25.
In der in Fig. 1 gezeigten Betriebsart ist die Mündung des nachgeordneten Beschickungsrohrs 25 mittels eines Absperrorgans 27, beispielsweise einem Schieber ver- schlössen. Tabak 16 wird daher nur durch das erste Beschickungsrohr 15 in den Trockner 10 eingeleitet. Diese Betriebsart ist insbesondere vorteilhaft, wenn die Konditioniereinrichtung 17 zum Konditionieren des Tabaks 16 verwendet wird. Wenn in einer anderen Betriebsart die Verwendung der Konditioniereinrichtung 17 nicht erforderlich ist oder sogar den Tabak 16 in unerwünschter Weise beeinflussen könnte, beispielsweise im Falle von expandiertem Tabak, kann das erste Beschickungs- rohr 15 mittels eines gestrichelt angedeuteten, entsprechenden Absperrorgans 28, bei- spielsweise einem Schieber zum Verschließen der ersten Einlassöffnung 14, verschlossen werden, und das nachgeordnete Beschickungsrohr 25 kann durch Öffnen des Absperrorgans 27 geöffnet werden, um eine Zuführung von gestrichelt angedeutetem Tabak 16 in den Trockner 10 durch das weitere Beschickungsrohr 25 unter Umgehung der Konditioniereinrichtung 17 vorzunehmen.In the operating mode shown in FIG. 1, the mouth of the downstream feed pipe 25 is closed by means of a shut-off element 27, for example a slide. Tobacco 16 is therefore introduced only through the first feed tube 15 in the dryer 10. This operating mode is particularly advantageous when the conditioning device 17 is used for conditioning the tobacco 16. If, in another mode of operation, the use of the conditioning device 17 is not required or could even undesirably affect the tobacco 16, for example in the case of expanded tobacco, the first feed tube 15 may be provided by means of a corresponding obturator 28 indicated by dashed lines, for example a slide for closing the first inlet opening 14, and the downstream feed pipe 25 can be opened by opening the obturator 27 to make a supply of dashed tobacco tobacco 16 in the dryer 10 through the further feed pipe 25, bypassing the conditioning device 17.
In einer weiteren Betriebsart können beide Beschickungsrohre 15, 25 in Fig. 1 geöffnet sein, um eine gleichzeitige Beschickung durch beide Beschickungsrohre 15, 25 vorzunehmen. Dies kann beispielsweise zweckmäßig sein, um feuchteren Tabak 16 durch das stromaufwärts angeordnete Beschickungsrohr 15 und weniger feuchten Tabak 16 durch das stromabwärts angeordnete Beschickungsrohr 25 einzuleiten, so dass der feuchtere Tabak auf der Strecke zwischen den beiden Beschickungsrohren eine zusätzliche Trocknung im Vergleich zu dem weniger feuchten Tabak erfährt.In another mode, both feed tubes 15, 25 may be opened in FIG. 1 to provide simultaneous feed through both feed tubes 15, 25. This may be useful, for example, to introduce more moist tobacco 16 through upstream feed tube 15 and less wet tobacco 16 through downstream feed tube 25, such that the more moist tobacco on the route between the two feed tubes provides additional drying compared to the less moist one Tobacco learns.
Die Ausführungsform gemäß Fig. 2 unterscheidet sich von derjenigen gemäß Fig. 1 darin, dass anstelle eines nachgeordneten weiteren Beschickungsrohrs ein in Strömungsrichtung des Heißgases 12 vorgeordnetes weiteres Beschickungsrohr 29 mit dem Trans- portrohr 1 1 verbunden ist. In dem weiteren Beschickungsrohr 29 ist gegebenenfalls eine Zellenradschleuse 30, jedoch vorzugsweise keine der Rotationswalze 17 entsprechende Konditioniereinrichtung vorgesehen. In der in Fig. 2 gezeigten Betriebsart wird das vor- geordnete Beschickungsrohr 29 zur Beschickung des Trockners 10 verwendet. In anderen Betriebsarten kann alternativ oder zusätzlich das erste Beschickungsrohr 15 zur Beschickung des Trockners 10 verwendet werden. Wenn das vorgeordnete Beschickungsrohr 25 nicht verwendet wird, wird es zweckmäßigerweise mittels eines zugeordneten Absperrorgans 31 verschlossen.The embodiment according to FIG. 2 differs from that according to FIG. 1 in that, instead of a downstream further feed pipe, a further feed pipe 29 arranged in the flow direction of the hot gas 12 is connected to the transport pipe 11. If necessary, a rotary feeder 30, but preferably no conditioning device corresponding to the rotary roller 17, is provided in the further feed tube 29. In the mode of operation shown in FIG. 2, the upstream feed pipe 29 is used to feed the dryer 10. In other modes, alternatively or additionally, the first feed tube 15 may be used to feed the dryer 10. If the upstream feed pipe 25 is not used, it is expediently closed by means of an associated obturator 31.
Die Ausführungsform gemäß Fig. 3 verdeutlicht, dass die Erfindung nicht auf zwei Beschickungsrohre beschränkt ist. In diesem Fall sind ein erstes Beschickungsrohr 15 mit Konditioniereinrichtung 17 und weitere vor- und nachgeordnete Beschickungsrohre 25 und 29 ohne entsprechende Konditioniereinrichtungen vorgesehen, die nach Bedarf einzeln oder in Kombination zur Beschickung des Transportrohrs 1 1 verwendbar sind.The embodiment of FIG. 3 illustrates that the invention is not limited to two feed tubes. In this case, a first feed pipe 15 with conditioning device 17 and further upstream and downstream feed pipes 25 and 29 provided without appropriate conditioning, which can be used individually or in combination to feed the transport tube 1 1 as needed.
Die Erfindung ist nicht auf eine Konditioniereinrichtung in Form einer rotierbaren Walze beschränkt. Es kann sich beispielsweise auch um eine raumfeste Konditioniereinrichtung, wie aus der DE-A 102004018879 bekannt, handeln. The invention is not limited to a conditioning device in the form of a rotatable roller. It may, for example, also be a space-fixed conditioning device, as known from DE-A 102004018879 act.

Claims

Ansprüche: Claims:
1. Stromtrockner zum Trocknen eines faserförmigen Tabakprodukts (16), mit einem von einem Heißgas (12) durchströmten Transportrohr (11) und einem in das Trans- portrohr (11) mündenden Beschickungsrohr (15) zum Beschicken des Transport- rohrs (11) mit Tabak (16), wobei in dem Beschickungsrohr (15) eine ein Konditio- niermedium (20) abgebende Konditioniereinrichtung (17) angeordnet ist, dadurch gekennzeichnet, dass der Stromtrockner mindestens ein weiteres in das Transportrohr (11) mündendes Beschickungsrohr (25; 29) zum Beschicken des Transportrohrs (11) mit Tabak ( 16) aufweist.1. current dryer for drying a fibrous tobacco product (16), with a of a hot gas (12) flowed through the transport pipe (11) and a in the transport pipe (11) opening feed pipe (15) for feeding the transport tube (11) Tobacco (16), wherein in the feed pipe (15) a conditioning medium (20) dispensing conditioning device (17) is arranged, characterized in that the flow dryer at least one further in the transport tube (11) opening feed pipe (25; 29) for feeding the transport tube (11) with tobacco (16).
2. Stromtrockner nach Anspruch 1, dadurch gekennzeichnet, dass das weitere Beschickungsrohr (25; 29) frei von einer ein Konditioniermedium abgebenden Konditioniereinrichtung ist.Second flow dryer according to claim 1, characterized in that the further feed pipe (25; 29) is free from a conditioning medium dispensing conditioning.
3. Stromtrockner nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das weitere Beschickungsrohr (25; 29) in Strömungsrichtung des Heißgases nach dem mit der Konditioniereinrichtung (17) ausgerüsteten Beschickungsrohr (15) angeordnet ist.3. Electric dryer according to claim 1 or 2, characterized in that the further feed pipe (25; 29) in the flow direction of the hot gas after the with the conditioning device (17) equipped feed pipe (15) is arranged.
4. Stromtrockner nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das weitere Beschickungsrohr (25; 29) in Strömungsrichtung des Heißgases vor dem mit der Konditioniereinrichtung (17) ausgerüsteten ersten Beschickungsrohr (15) angeordnet ist.4. Electric dryer according to claim 1 or 2, characterized in that the further feed pipe (25; 29) is arranged in the flow direction of the hot gas upstream of the first feed pipe (15) equipped with the conditioning device (17).
5. Stromtrockner nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass mindestens ein Absperrorgan (27; 28; 31) zum Verschließen eines der Beschickungsrohre (15; 25; 29) vorgesehen ist.5. Electric dryer according to one of the preceding claims, characterized in that at least one obturator (27; 28; 31) for closing one of the feed pipes (15; 25; 29) is provided.
6. Verfahren zum Trocknen eines faserförmigen Tabakprodukts, umfassend das Er- zeugen eines Heißgasstroms in einem Transportrohr, Beschicken des Transportrohrs mit Tabak durch ein in das Transportrohr mündendes Beschickungsrohr, und Einbringen von Konditioniermedium in das Beschickungsrohr mittels einer Konditioniereinrichtung, gekennzeichnet durch Beschicken des Transportrohrs mit Tabak durch mindestens ein weiteres in das Transportrohr mündendes Beschickungsrohr.6. A method of drying a fibrous tobacco product, comprising generating a stream of hot gas in a transport tube, loading the transport tube with tobacco through a feed tube into the transport tube, and introducing conditioning medium into the feed tube by means of a conditioning device, characterized by feeding the transport tube with Tobacco through at least one further feed pipe opening into the transport pipe.
7. Trocknungsverfahren nach Anspruch 6, dadurch gekennzeichnet, dass das weitere Beschickungsrohr frei von einer ein Konditioniermedium abgebenden Konditionier- einrichtung ist.7. Drying method according to claim 6, characterized in that the further feed tube is free from a conditioning medium dispensing conditioning device.
8. Trocknungsverfahren nach Anspruch 6 oder 7, gekennzeichnet durch wahlweises Beschicken mit Tabak durch eines der Beschickungsrohre.8. Drying method according to claim 6 or 7, characterized by selectively loading tobacco through one of the feed tubes.
9. Trocknungsverfahren nach Anspruch 8, dadurch gekennzeichnet, dass ein nicht verwendetes Beschickungsrohr verschlossen wird.9. Drying method according to claim 8, characterized in that an unused feed pipe is closed.
10. Trocknungsverfahren nach Anspruch 6 oder 7, gekennzeichnet durch Beschicken mit Tabak gleichzeitig durch die mindestens zwei Beschickungsrohre.10. Drying method according to claim 6 or 7, characterized by loading tobacco simultaneously through the at least two feed tubes.
1 1. Trocknungsverfahren nach Anspruch 10, dadurch gekennzeichnet, dass die mindestens zwei Beschickungsrohre zur gleichzeitigen Beschickung mit unterschiedlich feuchten Tabaken verwendet werden.1 drying process according to claim 10, characterized in that the at least two feed tubes are used for simultaneous feeding with differently moist tobaccos.
12. Trocknungsverfahren nach Anspruch 1 1 , dadurch gekennzeichnet, dass das in Strömungsrichtung erste Beschickungsrohr zur Beschickung mit feuchterem Tabak verwendet wird. 12. Drying method according to claim 1 1, characterized in that the flow direction in the first feed tube is used for feeding with moister tobacco.
EP07725547A 2006-05-23 2007-05-22 Flash dryer for drying a fibrous tobacco product Withdrawn EP2026667A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610024936 DE102006024936B3 (en) 2006-05-23 2006-05-23 Flow dryer e.g. for drying fibrous tobacco product, has hot gas transport pipe flow and in transport tube is joined tube for loading of tobacco on transport rollers
PCT/EP2007/004651 WO2007134879A1 (en) 2006-05-23 2007-05-22 Flash dryer for drying a fibrous tobacco product

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EP2026667A1 true EP2026667A1 (en) 2009-02-25

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EP (1) EP2026667A1 (en)
CN (1) CN101448415A (en)
DE (1) DE102006024936B3 (en)
WO (1) WO2007134879A1 (en)

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PL211482B1 (en) * 2007-09-24 2012-05-31 Int Tobacco Machinery Poland The manner and dosing unit for increasing of efficiency of the swelling process and drying of organic materials, especially in stream dryer
EP2113176A1 (en) * 2008-04-16 2009-11-04 Philip Morris Products S.A. Process for preparing a tobacco blend
DE102012200934B3 (en) * 2012-01-23 2013-04-18 Hauni Maschinenbau Ag A stream dryer and stream drying method for drying a tobacco material
PL2929788T3 (en) 2014-04-04 2018-10-31 Garbuio S.P.A. Drying plant for particulate materials
CN105686044A (en) * 2016-03-24 2016-06-22 云南中烟工业有限责任公司 Tobacco material mixing and drying method and device

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GB2323515B (en) * 1997-03-27 1999-02-10 British American Tobacco Co Tobacco dryers
DE19734364A1 (en) * 1997-08-08 1999-02-11 Hauni Maschinenbau Ag Method and device for applying a conditioning medium to tobacco material
DE19909318C2 (en) * 1999-03-03 2001-06-28 Bat Cigarettenfab Gmbh Method and device for expanding tobacco material
DE102004018879A1 (en) * 2004-04-15 2005-11-03 Hauni Primary Gmbh Conveyor arrangement for a machine of the tobacco processing industry

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CN101448415A (en) 2009-06-03
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