EP0089408A2 - Method and apparatus for ventilating the material to be dried in a tunnel dryer - Google Patents

Method and apparatus for ventilating the material to be dried in a tunnel dryer Download PDF

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Publication number
EP0089408A2
EP0089408A2 EP82110780A EP82110780A EP0089408A2 EP 0089408 A2 EP0089408 A2 EP 0089408A2 EP 82110780 A EP82110780 A EP 82110780A EP 82110780 A EP82110780 A EP 82110780A EP 0089408 A2 EP0089408 A2 EP 0089408A2
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EP
European Patent Office
Prior art keywords
tunnel
air
dry
dryer
housing
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Granted
Application number
EP82110780A
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German (de)
French (fr)
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EP0089408B1 (en
EP0089408A3 (en
Inventor
Eduard Steinacher
Claudio Eustacchio
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Vogel and Noot Industrieanlagenbau GmbH
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Fuchs & Co GmbH
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
    • F26B3/04—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour circulating over or surrounding the materials or objects to be dried
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B15/00—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form
    • F26B15/10—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions
    • F26B15/12—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined
    • F26B15/16—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined the objects or batches of materials being carried by wheeled trucks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/006—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects the gas supply or exhaust being effected through hollow spaces or cores in the materials or objects, e.g. tubes, pipes, bottles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
    • F26B21/022—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure with provisions for changing the drying gas flow pattern, e.g. by reversing gas flow, by moving the materials or objects through subsequent compartments, at least two of which have a different direction of gas flow
    • F26B21/024—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure with provisions for changing the drying gas flow pattern, e.g. by reversing gas flow, by moving the materials or objects through subsequent compartments, at least two of which have a different direction of gas flow by using movable fan units

Definitions

  • the invention relates to a method and a device for ventilating dry material in a tunnel dryer, in particular for brick blanks arranged in a single layer, which are moved through the dryer against the air flow, hot air being introduced into and out of the tunnel in the region of the exit side the tunnel cross-section located above the layer of dry material is deflected in several areas in the longitudinal direction of the tunnel down to the layers and suctioned out of the tunnel in the area of the entry side.
  • tunnel dryers of the type described above the tunnels of which are a few meters wide and a few meters high, correspondingly large wagons are conveyed in the longitudinal direction, on which the dry material is deposited in stages.
  • the air required to discharge the moisture in the dry material is directed through the tunnel dryer against the direction of movement of the wagons.
  • Dryers are known in which further hot air devices are provided over the length of the dryer tunnel, or in which the air is wholly or partly removed from the dryer tunnel, heated and then fed again.
  • the air speed of the dry air through the tunnel dryer of the above-mentioned type working in the countercurrent principle is approximately 0.5 to 2.0 m / sec.,
  • the air mainly moving along the upper cross section of the tunnel due to its heating, so that this is in the lower cross section and in dry material located in the middle sections of the tunnel dries very slowly.
  • tunnel dryers have been developed in which the circulating fans have been set up to be movable between the dryer car trains and ventilate the dry material in accordance with a specific program.
  • Tunnel dryers with a flat tunnel have also become known, in which only a low layer of dry material, about 0.2 to 0.5 meters, is dried in wide tunnels according to the countercurrent principle, and the circulation fans are arranged fixedly or movably above the dry material and the dry material mainly blows on the outer surfaces.
  • the invention is therefore based on the object to provide a tunnel dryer according to the generic term, in which the drying is intensified by improved ventilation and the ventilation of the dry material through the cavities of the dry material also takes place inside the same as on the outer surfaces.
  • transverse air circulation housings are arranged, which are aerodynamically designed and blow the air sucked in by the built-in circulation fan with the help of air baffles across the cavities of the dry material.
  • the air is forced to enter the spaces between and into the dry goods in order to flow through them.
  • the air circulation housings are mounted on movable carriages and are moved back and forth in the dryer for a few meters, so that the dry goods are homogeneously loaded through the cavities.
  • the air guide bodies move in narrow "alleys" between the bricks, so that only a few bricks are blown at once from the left, then from the right.
  • a suitable drying interval can be formed by the advantageous profiling of the circulating housing and air guide bodies as well as by their movability in the longitudinal direction, so that the air flows through the drying material alternately from both sides.
  • the circulation housing is designed as a hollow body, internal heating would be conceivable.
  • a tunnel dryer 1 is shown in longitudinal section in a schematic manner.
  • this tunnel dryer 1 has an entry side on the left, which is closed by a gate 2, and on the right side an exit side, which is closed by a gate 3.
  • a suction opening 7 in the upper part of the tunnel dryer 1 which is connected to a Suction pipe 8 is connected.
  • This suction pipe 8 is connected to a suction device, not shown, which ensures that the air 20 is extracted as moist exhaust air in the direction of arrow 9 from the tunnel dryer 1.
  • dryer cars 10 on rails 11 are moved continuously in the direction of arrow 12 by means of a drive (not shown).
  • the dry material 13 On the dryer car 10 is the dry material 13, which is formed in the illustrated embodiments from brick moldings. These shaped bricks have a percentage of holes that can vary from 15 to 60%, depending on the type of brick. The direction of the hole is at right angles to the transport direction of the dryer car 10.
  • circulation fans 14 with housings 18 and blow-out profiles 19, which can be moved back and forth in the longitudinal direction of the tunnel dryer 1 by means of slides 15 on rails 16.
  • These fans 14 with housing 18 and blow-out profiles 19 can, as shown in the exemplary embodiment according to FIG. 1, be connected to one another by a coupling 17, so that only a common drive is required, or else can be moved independently of one another without a coupling if each unit is above has its own travel drive, not shown in the illustration. Both distances between the individual units and the driving speed can be freely selected.
  • the housing 18 and blow-out profiles 19 are designed as hollow bodies into which the circulating air 21 blown in by the circulation fan 14 is passed between the rows of the dry material and finally blown directly into the holes in the bricks.
  • the configuration of the blow-out profiles 19 can vary be that a circulating air speed is achieved, which ensures a flow through the dry material.
  • the training b lasquerterrorism the Ausblasprofile 19 is further adapted to the height of the dry material 13 to blow the dry material 13 over the entire surface.
  • the circulating air 21 will not only wash around the dry material 13 on the surface, but also ventilate the core and thus also dry from the inside and not only from the outside. Intensive drying is achieved through the targeted application of dry air to the dry material.
  • FIG. 2 shows the drying tunnel 1 in cross section with the dryer car 10, which is guided in parallel on the rails 11 and on which the dry goods 13 with the hole direction of the dry goods lie transversely to the transport direction of the dryer cars 10.
  • the fan with housing 18 and blow-out profile 19, which is moved on rails 16 above the dryer carriage 10, is also shown in cross section.
  • the circulating air 21 drawn in by the fan 14 is blown through the housing 18 and further through the blow-out profiles 19 into the holes in the dry material 13 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

1. Method for ventilating material to be dried in a tunnel dryer, particularly for green bricks disposed in a single layer, which are moved through the dryer in the opposite direction of an air flow, which method comprises that hot drying air is first introduced with overpressure into the tunnel in the zone of the drive-out side, then accelerated at several places which are located behind each other in the longitudinal direction of the tunnel, and, transversely to the main flow direction, simultaneously directed to the material to be dried, and finally drawn off from the tunnel in the zone of the drive-in side, characterised in that, if the material to be dried is provided with air ducts, the latter are disposed transversely to the moving direction so that the drying air is led both along the outer surface and through the air ducts of the material to be dried, and that the drying air is drawn in, for accelerating it against the main flow direction, from the space of the dryer which is above the material to be dried so that the air is directed downward to the material to be dried.

Description

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zur Belüftung von Trockengut in einem Tunneltrockner, insbesondere für in einer einzigen Lage angeordnete Ziegelrohlinge, die durch den Trockner entgegen der Luftströmung hindurchbewegt werden, wobei heiße Luft im Bereich der Ausfahrseite in den Tunnel mit Überdruck eingeleitet und aus dem sich oberhalb der Lage von Trockengut befindlichen Tunnelquerschnitt in mehreren Bereichen in Tunnellängsrichtung nach unten zu den Lagen abgelenkt und im Bereich der Einfahrseite aus dem Tunnel abgesaugt wird.The invention relates to a method and a device for ventilating dry material in a tunnel dryer, in particular for brick blanks arranged in a single layer, which are moved through the dryer against the air flow, hot air being introduced into and out of the tunnel in the region of the exit side the tunnel cross-section located above the layer of dry material is deflected in several areas in the longitudinal direction of the tunnel down to the layers and suctioned out of the tunnel in the area of the entry side.

In Tunneltrocknern der oben beschriebenen Art, deren Tunnel einige Meter breit und einige Meter hoch sind, werden entsprechend große Wagen in Längsrichtung gefördert, auf welchen das Trockengut etagenweise abgesetzt ist. Die zur Austragung der Feuchte des Trockengutes notwendige Luft wird entgegen der Bewegungsrichtung der Wagen durch den Tunneltrockner hindurchgeleitet. Es sind Trockner bekannt, bei denen über die Länge der Trocknertunnel weitere Heißlufteinrichtungen vorgesehen sind, oder bei denen die Luft ganz oder teilweise dem Trocknertunnel entnommen, erhitzt und dann wieder eingespeist wird.In tunnel dryers of the type described above, the tunnels of which are a few meters wide and a few meters high, correspondingly large wagons are conveyed in the longitudinal direction, on which the dry material is deposited in stages. The air required to discharge the moisture in the dry material is directed through the tunnel dryer against the direction of movement of the wagons. Dryers are known in which further hot air devices are provided over the length of the dryer tunnel, or in which the air is wholly or partly removed from the dryer tunnel, heated and then fed again.

Die Luftgeschwindigkeit der Trockenluft durch den im Gegenstromprinzip arbeitenden Tunneltrockner vorgenannter Art beträgt etwa 0,5 bis 2,0 m/sec., wobei sich die Luft infolge ihrer Erwärmung vornehmlich im oberen Querschnitt des Tunnels entlangbewegt, so daß das sich im unteren Querschnitt und in mittleren Abschnitten des Tunnels befindliche Trockengut nur sehr langsam trocknet.The air speed of the dry air through the tunnel dryer of the above-mentioned type working in the countercurrent principle is approximately 0.5 to 2.0 m / sec., The air mainly moving along the upper cross section of the tunnel due to its heating, so that this is in the lower cross section and in dry material located in the middle sections of the tunnel dries very slowly.

Zur Verbesserung der Produktionskapazität des Tunneltrockners ist es bekannt, Umwälzventilatoren für die Trockenluft entlang dem Trocknertunnel vorzusehen, um die Luft mit einem Vielfachen der Durchsatzleistung über den Tunnelquerschnitt umzuwälzen und somit eine Vergleichmäßigung von Temperaturen und Feuchte über dem Tunnelquerschnitt zu erzielen und das Trockengut mit Trockenluft zu beaufschlagen.In order to improve the production capacity of the tunnel dryer, it is known to provide circulation fans for the dry air along the dryer tunnel in order to circulate the air over the tunnel cross-section with a multiple of the throughput and thus to achieve an equalization of temperatures and moisture across the tunnel cross-section and to dry the dry material with dry air act upon.

Da bei kontinuierlicher Belüftung des Trockengutes das Wasser an der Oberfläche des Trockengutes rascher verdunstet wird als es durch die Kapillaren des Trockengutes nachgeför- dert werden kann, beginnt das Trockengut an der Oberfläche rascher auszutrocknen, so daß es an der Oberfläche rascher schwindet als im Inneren. Hierdurch können am Trockengut Schäden wie Risse, Sprünge usw. entstehen.Since continuous aeration of the dry material the water evaporates more rapidly at the surface of the dried material as it can be through the capillaries of the dry material achgeför- n changed, the dried material at the surface begins rapidly drying so that it shrinks to the surface more rapidly than in the interior . This can cause damage such as cracks, cracks, etc. to the dry goods.

Zur Vermeidung dieses Nachteiles sind Tunneltrockner entwickelt worden, bei welchen die Umwälzgebläse verfahrbar zwischen den Trocknerwagenzügen eingerichtet wurden und das Trockengut entsprechend einem bestimmten Programm belüften. Hierdurch werden die oben beschriebenen Nachteile der dauernden Belüftung verringert, jedoch wird das Trockengut vornehmlich an den Außenflächen von Trockenluft umspült, so daß immer noch ein beträchtlicher Feuchteunterschied zwischen dem Inneren und Äußeren des Trockengutes besteht, was zur Rißbildung führt.In order to avoid this disadvantage, tunnel dryers have been developed in which the circulating fans have been set up to be movable between the dryer car trains and ventilate the dry material in accordance with a specific program. This reduces the above-described disadvantages of permanent ventilation, but the dry material is primarily washed around the outer surfaces by dry air, so that there is still a considerable difference in moisture between the inside and the outside of the dry material, which leads to the formation of cracks.

Es sind ferner Tunneltrockner mit flachem Tunnel bekanntgeworden, bei welchen nur eine niedrige Lage von Trockengut, etwa 0,2 bis 0,5 Meter, in breiten Tunneln im Gegenstromprinzip getrocknet wird und wobei die Umwälzventilatoren fest oder beweglich über dem Trockengut angeordnet sind und das Trockengut vornehmlich an den Außenflächen anbläst.Tunnel dryers with a flat tunnel have also become known, in which only a low layer of dry material, about 0.2 to 0.5 meters, is dried in wide tunnels according to the countercurrent principle, and the circulation fans are arranged fixedly or movably above the dry material and the dry material mainly blows on the outer surfaces.

Bei den bekannten flachen Tunneltrockern werden wesentlich raschere Durchlaufzeiten als bei großräumigeren Tunneltrocknern erzielt, wobei die Luftgeschwindigkeit in den Tunneltrocknern bis zu 12,0 m/sec. beträgt.In the known flat tunnel dryers are essential faster throughput times than with larger-scale tunnel dryers, the air speed in the tunnel dryers up to 12.0 m / sec. is.

Bei beiden, mit Umwälzventilatoren bestückten Systemen wird das Trockengut vornehmlich an den Außenflächen angeblasen, wodurch es zu großen Unterschieden der Feuchte und damit der Schwindung des Trockengutes zwischen dem Inneren und Äußeren des Trockengutes kommt, was zur Rissebildung, sogar Zerstörung führt.In both systems equipped with circulation fans, the dry material is blown primarily on the outer surfaces, which causes large differences in the moisture and thus the shrinkage of the dry material between the inside and outside of the dry material, which leads to cracking and even destruction.

Schließlich sind zur Erzielung einer gesteuerten Luftströmung und zur Verbesserung des Trocknungsvorgangs ein Verfahren und eine Vorrichtung bekannt geworden, bei welchen auf Schienen verfahrbare Leitkörper vorgesehen sind, die den sich oberhalb des Trockengutes befindlichen freien Tunnelquerschnitt fast vollständig abdecken und ein strömungsgünstiges An- bzw. Abströmprofil besitzen. Die Leitkörper können programmgesteuert derart bewegt werden, daß sich innerhalb des Trockenofens eine gleichmäßige wellenförmige Laminarströmung entwickelt, die nach unten durch das Trockengut abgeleitet wird. Zwar wird die Trocknung des Trockengutes durch dieses Verfahren vergleichmäßigt und verbessert, jedoch hat sich in der Praxis gezeigt, daß ein einfaches nach unten Ablenken der Strömungsluft nicht genügt, da das Verhältnis der die Außenflächen umströmenden Luft zu der durch die Hohlräume durchtretenden Luft nicht ausgewogen ist, so daß die Gefahr der Rissebildung nicht vollständig beseitigt wird.Finally, to achieve a controlled air flow and to improve the drying process, a method and a device have become known in which guide bodies which can be moved on rails are provided, which almost completely cover the free tunnel cross section located above the material to be dried and have a flow-favorable inflow or outflow profile . The guide bodies can be moved in a program-controlled manner in such a way that a uniform undulating laminar flow develops within the drying oven and is diverted downward through the dry material. Although the drying of the dry material is evened out and improved by this method, it has been shown in practice that simply deflecting the flow air downward is not sufficient, since the ratio of the air flowing around the outer surfaces to the air passing through the cavities is not balanced , so that the risk of cracking is not completely eliminated.

Der Erfindung liegt daher die Aufgabe zugrunde, einen Tunneltrockner gemäß dem Gattungsbegriff zu schaffen, bei welchem die Trocknung durch eine verbesserte Belüftung intensiviert wird und die Belüftung des Trockengutes durch die Hohlräume des Trockengutes auch im Inneren desselben gleich wie an den Außenflächen erfolgt.The invention is therefore based on the object to provide a tunnel dryer according to the generic term, in which the drying is intensified by improved ventilation and the ventilation of the dry material through the cavities of the dry material also takes place inside the same as on the outer surfaces.

Diese Aufgabe wird erfindungsgemäß durch die im Kennzeichen der Ansprüche 1 bzw.3 angegebenen Merkmale gelöst. Weitere vorteilhafte Verfahrensschritte bzw. Ausgestaltungen der zum Verfahren dienenden Vorrichtung ergeben sich aus den Unteransprüchen.This object is achieved by the features specified in the characterizing part of claims 1 and 3, respectively. Further advantageous method steps or refinements of the device used for the method result from the subclaims.

Gemäß der Erfindung sind bei dem flachen Tunneltrockner der über dem Trocknerwagen und dem darauf meist nur einlagig geschichteten Trockengut verfügbare große freie Querschnitt, durch welchen sich die Trockenluft entsprechend langsam von der Ausfahrseite bzw. Einblaseinrichtung zur Einfahrseite bzw. Absaugeinrichtung bewegt, querliegende Luftumwälzgehäuse angeordnet, welche strömungsgünstig ausgebildet sind und die vom im Gehäuse eingebauten Umwälzventilator angesaugte Luft mit Hilfe von Luftleitkörpern quer durch die Hohlräume des Trockengutes blasen. Die Luft ist dadurch gezwungen, in die frei bleibenden Räume zwischen und in das Trockengut einzutreten, um dieses zu durchströmen. Um die Beaufschlagung gleichmäßig über das flächenmäßig angeordnete Trockengut im Trocknertunnel zu verteilen, sind die Luftumwälzgehäuse auf verfahrbaren Schlitten montiert und werden im Trockner einige Meter vor und zurück bewegt, um somit eine homogene Beaufschlagung des Trockengutes mit Trockenluft auch durch die Hohlräume desselben zu bewirken. Die Luftleitkörper bewegen sich in schmalen "Gassen" zwischen den Ziegeln, so daß immer nur einige Ziegel einmal von links, dann von rechts angeblasen werden.According to the invention, in the flat tunnel dryer, the large free cross-section available above the dryer car and the drying material, which is usually only layered on top of it, through which the drying air moves correspondingly slowly from the exit side or blowing device to the entry side or suction device, transverse air circulation housings are arranged, which are aerodynamically designed and blow the air sucked in by the built-in circulation fan with the help of air baffles across the cavities of the dry material. The air is forced to enter the spaces between and into the dry goods in order to flow through them. In order to distribute the load evenly over the dry goods in the dryer tunnel, the air circulation housings are mounted on movable carriages and are moved back and forth in the dryer for a few meters, so that the dry goods are homogeneously loaded through the cavities. The air guide bodies move in narrow "alleys" between the bricks, so that only a few bricks are blown at once from the left, then from the right.

Durch die vorgeschlagene Belüftung des Trockengutes in steuerbaren Intervallen wird die Trocknung auch im Trockengut gleichmäßig und schonend bewirkt, so daß das Trockengut außen und innen gleichmäßig trocknet. Die Trockenluft strömt gleichzeitig relativ langsam durch den Trocknertunnel, der Umwälzventilator saugt oben auf derjenigen Seite des Gehäuses an, die der von der trockenen Heißluft angeströmten Seite gegenüber liegt, so daß die Steuerung des Feuchtegefälles entsprechend den Anforderungen, die durch das Trokkengut gestellt werden, in einfacher Weise erfolgen kann. Durch die vorteilhafte Profilierung der Umwälzgehäuse und Luftleitkörper sowie durch deren Verfahrbarkeit in Längsrichtung kann ein entsprechendes Trocknungsintervall gebildet werden, so daß die Luft impulsartig das Trockengut wechselnd von beiden Seiten durchströmt.Due to the proposed ventilation of the dry material at controllable intervals, the drying is effected evenly and gently in the dry material, so that the dry material dries evenly on the outside and inside. At the same time, the dry air flows through the dryer tunnel relatively slowly, the circulation fan sucks in at the top of that side of the housing which is opposite the side from which the dry hot air flows, so that the moisture gradient can be controlled in accordance with the requirements caused by the dryer can be provided in a simple manner. A suitable drying interval can be formed by the advantageous profiling of the circulating housing and air guide bodies as well as by their movability in the longitudinal direction, so that the air flows through the drying material alternately from both sides.

Da die Umwälzgehäuse als Hohlkörper ausgebildet sind, wäre eine Innenbeheizung denkbar.Since the circulation housing is designed as a hollow body, internal heating would be conceivable.

Weitere Merkmale, Einzelheiten und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung eines bevorzugten Ausführungsbeispieles anhand der Zeichnung. Darin zeigen:

  • Figur 1 Ein bevorzugtes Ausführungsbeispiel des mit der erfindungsgemäßen Vorrichtung ausgestatteten Tunneltrockners im Längsschnitt und
  • Figur 2 einen schematischen Querschnitt durch den Tunneltrockner nach Figur 1.
Further features, details and advantages of the invention result from the following description of a preferred exemplary embodiment with reference to the drawing. In it show:
  • Figure 1 A preferred embodiment of the tunnel dryer equipped with the device according to the invention in longitudinal section and
  • FIG. 2 shows a schematic cross section through the tunnel dryer according to FIG. 1.

In Figur 1 ist in schematischer Weise ein Tunneltrockner 1 im Längsschnitt dargestellt. Dieser Tunneltrockner 1 besitzt in Bezug auf Figur 1 links eine Einfahrseite, welche durch ein Tor 2 verschlossen ist und auf der rechten Seite eine Ausfahrseite, welche durch ein Tor 3 verschlossen ist.In Figure 1, a tunnel dryer 1 is shown in longitudinal section in a schematic manner. In relation to FIG. 1, this tunnel dryer 1 has an entry side on the left, which is closed by a gate 2, and on the right side an exit side, which is closed by a gate 3.

Im Bereich der Ausfahrseite befindet sich eine Einblasöffnung 4 für Trockenluft, an welche ein Einblasrohr 5 angeschlossen ist, welches mit einer nicht dargestellten Einblasvorrichtung in Verbindung steht. über dieses Einblasrohr 5 wird Trockenluft 20 in Richtung des Pfeiles 6 in den Tunneltrockner 1 eingeblasen.In the area of the exit side there is an injection opening 4 for dry air, to which an injection tube 5 is connected, which is connected to an injection device (not shown). Dry air 20 is blown into the tunnel dryer 1 in the direction of arrow 6 via this blowing tube 5.

Im Bereich der Einfahrseite befindet sich im oberen Teil des Tunneltrockners 1 eine Absaugöffnung 7, welche mit einem Absaugrohr 8 verbunden ist. Dieses Absaugrohr 8 steht mit einer nicht dargestellten Absaugeinrichtung in Verbindung, welche dafür sorgt, daß die Luft 20 als feuchte Abluft in Richtung des Pfeiles 9 aus dem Tunneltrockner 1 abgesaugt wird.In the area of the entry side there is a suction opening 7 in the upper part of the tunnel dryer 1, which is connected to a Suction pipe 8 is connected. This suction pipe 8 is connected to a suction device, not shown, which ensures that the air 20 is extracted as moist exhaust air in the direction of arrow 9 from the tunnel dryer 1.

Durch den Tunneltrockner 1 werden Trocknerwagen 10 auf Schienen 11 mittels eines nicht dargestellten Antriebes in Richtung des Pfeiles 12 kontinuierlich hindurchbewegt.Through the tunnel dryer 1, dryer cars 10 on rails 11 are moved continuously in the direction of arrow 12 by means of a drive (not shown).

Auf dem Trocknerwagen 10 befindet sich das Trockengut 13, welches bei den dargestellten Ausführungsbeispielen von Ziegelformlingen gebildet wird. Diese Ziegelformlinge haben einen Lochanteil, der von 15 bis 60 %, je nach Ziegeltyp, schwanken kann. Die Lochrichtung liegt im rechten Winkel quer zur Transportrichtung der Trocknerwagen 10.On the dryer car 10 is the dry material 13, which is formed in the illustrated embodiments from brick moldings. These shaped bricks have a percentage of holes that can vary from 15 to 60%, depending on the type of brick. The direction of the hole is at right angles to the transport direction of the dryer car 10.

Im freien Querschnitt des flachen Tunneltrockners 1, oberhalb des Trockengutes 13 befinden sich Umwälzventilatore 14 mit Gehäusen 18 und Ausblasprofilen 19, welche mittels Schlitten 15 auf Schienen 16 in Längsrichtung des Tunneltrockners 1 hin und her verfahrbar sind. Diese Ventilatore 14 mit Gehäuse 18 und Ausblasprofilen 19 können, wie beim Ausführungsbeispiel gemäß Figur 1 gezeigt, untereinander durch eine Koppel 17 verbunden sein, so daß nur ein gemeinsamer Antrieb benötigt wird, oder aber auch ohne Koppel voneinander unabhängig verfahrbar sein, wenn jede Einheit über einen eigenen, in der Darstellung nicht abgebildeten Fahrantrieb verfügt. Es können sowohl Abstände zwischen den einzelnen Einheiten wie auch die Fahrgeschwindigkeit frei gewählt werden.In the free cross section of the flat tunnel dryer 1, above the drying material 13, there are circulation fans 14 with housings 18 and blow-out profiles 19, which can be moved back and forth in the longitudinal direction of the tunnel dryer 1 by means of slides 15 on rails 16. These fans 14 with housing 18 and blow-out profiles 19 can, as shown in the exemplary embodiment according to FIG. 1, be connected to one another by a coupling 17, so that only a common drive is required, or else can be moved independently of one another without a coupling if each unit is above has its own travel drive, not shown in the illustration. Both distances between the individual units and the driving speed can be freely selected.

Die Gehäuse 18 und Ausblasprofile 19 sind als Hohlkörper ausgebildet, in welche die vom Umwälzventilator 14 eingeblasene Umwälzluft 21 zwischen die Reihen des Trockengutes geleitet und schließlich direkt in die Löcher der Ziegel geblasen wird. Die Ausbildung der Ausblasprofile 19 kann dabei so variiert werden, daß eine Umwälzluftgeschwindigkeit erzielt wird, die eine Durchströmung des Trockengutes gewährleistet. Der Aus- blasquerschnitt der Ausblasprofile 19 wird ferner an die Höhe des Trockengutes 13 angepaßt, um das Trockengut 13 über die gesamte Fläche anzublasen.The housing 18 and blow-out profiles 19 are designed as hollow bodies into which the circulating air 21 blown in by the circulation fan 14 is passed between the rows of the dry material and finally blown directly into the holes in the bricks. The configuration of the blow-out profiles 19 can vary be that a circulating air speed is achieved, which ensures a flow through the dry material. The training b lasquerschnitt the Ausblasprofile 19 is further adapted to the height of the dry material 13 to blow the dry material 13 over the entire surface.

Somit wird die Umwälzluft 21 das Trockengut 13 nicht nur an der Oberfläche umspülen, sondern auch im Kern belüften und damit auch von innen und nicht nur von außen trocknen. Durch die gezielte Beaufschlagung mit Trockenluft auf das Trockengut wird eine intensive Trocknung erzielt.Thus, the circulating air 21 will not only wash around the dry material 13 on the surface, but also ventilate the core and thus also dry from the inside and not only from the outside. Intensive drying is achieved through the targeted application of dry air to the dry material.

Figur 2 zeigt den Trockentunnel 1 im Querschnitt mit dem über zwei parallel auf den Schienen 11 geführten Trocknerwagen 10, auf welchen das Trockengut 13 mit der Lochrichtung des Trokkengutes quer zur Transportrichtung der Trocknerwagen 10 liegt.FIG. 2 shows the drying tunnel 1 in cross section with the dryer car 10, which is guided in parallel on the rails 11 and on which the dry goods 13 with the hole direction of the dry goods lie transversely to the transport direction of the dryer cars 10.

Der über dem Trocknerwagen 10 auf Schienen 16 bewegte Ventilator mit Gehäuse 18 und Ausblasprofil 19 ist ebenfalls im Querschnitt dargestellt. Die vom Ventilator 14 angesaugte Umwälzluft 21 wird dabei durch das Gehäuse 18 und im weiteren durch die Ausblasprofile 19 in die Löcher des Trockengutes 13 geblasen. Wie aus Figur 1 zu entnehmen ist, findet dabei eine Umkehr der Strömungsrichtung der Heißluft statt, so daß die Luftströmung beruhigt und gezielt und gleichmäßig nach unten zum Trockengut abgeleitet wird.The fan with housing 18 and blow-out profile 19, which is moved on rails 16 above the dryer carriage 10, is also shown in cross section. The circulating air 21 drawn in by the fan 14 is blown through the housing 18 and further through the blow-out profiles 19 into the holes in the dry material 13 . As can be seen from Figure 1, there is a reversal of the flow direction of the hot air, so that the air flow is calmed down and is specifically and evenly diverted downwards to the dry material.

Bezugszeichenliste zu F 4346Reference symbol list for F 4346

  • 1 Tunneltrockner1 tunnel dryer
  • 2 Tor Einfahrseite2 gate entry side
  • 3 Tor Ausfahrseite3 gate exit side
  • 4 Einblasöffnung4 injection opening
  • 5 Einblasrohr5 injection pipe
  • 6 Trockenluft (heiß)6 dry air (hot)
  • 7 Absaugöffnung7 suction opening
  • 8 Absaugrohr8 suction pipe
  • 9 Trockenluft (naß)9 dry air (wet)
  • 10 Trocknerwagen10 dryer cars
  • 11 Schiene11 rail
  • 12 Transportrichtung Wagen12 Transport direction wagon
  • 13 Trockengut13 dry goods
  • 14 Ventilator14 fan
  • 15 Schlitten15 sledges
  • 16 Fahrschiene16 track
  • 17 Koppel17 paddocks
  • 18 Gehäuse18 housing
  • 19 Ausblasprofil19 blow-out profile
  • 20 Luftstrom im Trockner20 Airflow in the dryer
  • 21 Umwälzluft21 Circulating air

Claims (7)

1. Verfahren zur Belüftung von Trockengut in einem Tunneltrockner, insbesondere für in einer einzigen Lage angeordnete Ziegelrohlinge, die durch den Trockner entgegen der Luftströmung hindurchbewegt werden, wobei heiße Luft im Bereich der Ausfahrseite in den Tunnel mit Überdruck eingeleitet und aus dem sich oberhalb der Lagen von Trockengut befindlichen Tunnelquerschnitt in mehreren Bereichen in Tunnellängsrichtung nach unten zu den Lagen abgelenkt und im Bereich der Einfahrseite aus dem Tunnel abgesaugt wird, dadurch gekennzeichnet, daß die Hohlräume des Trockengutes in Querrichtung zur Fortbewegungsrichtung angeordnet werden und daß die von der Einfahrseite zur Ausfahrseite durch den Tunneltrockner strömende Trockenluft an mehreren in Tunnellängsrichtung hintereinander gelegenen Stellen beschleunigt und quer zur Hauptströmungsrichtung durch die Hohlräume und über die Außenflächen des Trockengutes geleitet wird.1. Method for ventilation of dry material in a tunnel dryer, in particular for brick blanks arranged in a single layer, which are moved through the dryer against the air flow, hot air being introduced into the tunnel at the exit side with excess pressure and from which there is above the layers tunnel cross-section located in the longitudinal direction of the tunnel is deflected downward to the layers in the longitudinal direction of the tunnel and suctioned out of the tunnel in the area of the entry side, characterized in that the cavities of the dry matter are arranged in the transverse direction to the direction of travel and that from the entry side to the exit side through the tunnel drier flowing air T rock at a plurality of speeds in the tunnel longitudinal direction one behind the other lying places and is guided transversely to the main flow direction through the cavities and on the exterior surfaces of the dried material. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Trockenluftströmungsrichtung vor der Beschleunigung und der zum Trockengut erfolgenden Umlenkung der Trockenluft um 180° gedreht wird.2. The method according to claim 1, characterized in that the dry air flow direction is rotated by 180 ° before the acceleration and the deflection of the dry air taking place to the dry material. 3. Vorrichtung zur Durchführung des Verfahrens nach Anspruch 1 oder 2 umfassend einen Tunneltrockner (1) mit einer an der Ausfahrseite (3) angeordneten Einblaseinrichtung (4, 5) für trockene Heißluft und einer an der Einfahrseite (2) angeordneten Absaugeinrichtung (7, 8) für feuchte Abluft und wenigstens einen Luftumwälzventilator (14, 18) mit Gehäuse, der in dem sich oberhalb des Trockengutes (13) befindlichen Tunnelquerschnitt (1) angeordnet ist und die Luftströmung (20) zwangsweise durch das Trockengut (13) hindurchleitet, dadurch gekennzeichnet, daß das Gehäuse (18) den freien Tunnelquerschnitt (1) ausfüllt und bis zur Setzlage seitlich vom Trockengut (13) nach unten greifende Gehäuseteile aufweist, in denen Ausblasöffnungen (19) vorgesehen sind, so daß die trockene Heißluft zwischen den Reihen bzw. am Rande des Trocknerwagens (10) immer in gleicher Höhe mit den Reihen des Trockengutes (13) quer zur Bewegungsrichtung des Trockengutes austritt.3. Device for carrying out the method according to claim 1 or 2 comprising a tunnel dryer (1) with a blowing device (4, 5) arranged on the exit side (3) for dry hot air and a suction device (7, 8) arranged on the entry side (2) ) for moist exhaust air and at least one air circulation fan (14, 18) with housing, which is arranged in the tunnel cross section (1) located above the dry material (13) and forcibly directs the air flow (20) through the dry material (13), characterized that the housing (18) fills the free tunnel cross-section (1) and has up to the setting position laterally from the dry material (13) reaching down housing parts in which blow-out openings (19) are provided so that the dry hot air between the rows or on Edge of the dryer car (10) always exits at the same height with the rows of the dry goods (13) transversely to the direction of movement of the dry goods. 4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß die Ansaugöffnung des Luftumwälzventilators (14) auf derjenigen Seite des Gehäuses (18) angeordnet ist, die der von der trockenen Heißluft angeströmten Seite gegenüber liegt.4. The device according to claim 3, characterized in that the suction opening of the air circulation fan (14) is arranged on that side of the housing (18) which is opposite the side from which the dry hot air flows. 5. Vorrichtung nach Anspruch 3 oder 4, dadurch gekennzeichnet, daß die Gehäuse (14, 18) der Luftumwälzventilatoren ein strömungsgünstiges Anström- und Abströmprofil aufweisen, so daß die Luftströmung als gleichmäßige wellenförmige Laminarströmung durch das Trockengut (13) hindurchgeleitet wird.5. Apparatus according to claim 3 or 4, characterized in that the housing (14, 18) of the air circulation fans have a streamlined inflow and outflow profile, so that the air flow is passed as a uniform undulating laminar flow through the dry material (13). 6. Vorrichtung nach einem der Ansprüche 3 bis 5, dadurch gekennzeichnet, daß die Luftumwälzventilatorenmit Gehäuse (14, 18) auf verfahrbaren Schlitten (15) oder dergleichen montiert sind, die in Tunnellängsrichtung bewegbar sind.6. Device according to one of claims 3 to 5, characterized in that the air circulation fans with housing (14, 18) are mounted on movable slides (15) or the like, which can be moved in the longitudinal direction of the tunnel. 7. Vorrichtung nach einem der Ansprüche 3 bis 6, dadurch gekennzeichnet, daß die Luftumwälzgehäuse (18) durch Ausblasprofile (19) ergänzt sind, welche eine Änderung des Luftstromes in Geschwindigkeit und/oder Ausblasquerschnitt ermöglichen.7. Device according to one of claims 3 to 6, characterized in that the air circulation housing (18) are supplemented by blow-out profiles (19) which allow a change in the air flow in speed and / or blow-out cross section.
EP82110780A 1982-03-23 1982-11-22 Method and apparatus for ventilating the material to be dried in a tunnel dryer Expired EP0089408B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823210652 DE3210652A1 (en) 1982-03-23 1982-03-23 METHOD AND DEVICE FOR VENTILATING DRY GOODS IN A TUNNEL DRYER
DE3210652 1982-03-23

Publications (3)

Publication Number Publication Date
EP0089408A2 true EP0089408A2 (en) 1983-09-28
EP0089408A3 EP0089408A3 (en) 1985-03-06
EP0089408B1 EP0089408B1 (en) 1987-10-07

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EP82110780A Expired EP0089408B1 (en) 1982-03-23 1982-11-22 Method and apparatus for ventilating the material to be dried in a tunnel dryer

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EP (1) EP0089408B1 (en)
DE (2) DE3210652A1 (en)
ES (1) ES518165A0 (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0343618A2 (en) * 1988-05-27 1989-11-29 Erlus Baustoffwerke AG Process and apparatus for drying hollow block preforms
EP0676605A1 (en) * 1994-04-11 1995-10-11 Keller GmbH Support for ceramic freshly shaped bodies to be dried, such as hollow blocks, and freshly shaped body support arrangement
DE4412352A1 (en) * 1994-04-11 1995-10-26 Keller Gmbh Tunnel dryer for ceramic mouldings has improved air movement for drying low brick or tile stacks
WO1997005437A1 (en) * 1995-07-27 1997-02-13 Novokeram Max Wagner Gmbh Process and device for drying ceramic green bricks
DE29721763U1 (en) * 1997-12-10 1999-04-08 Novokeram Max Wagner GmbH, 86381 Krumbach Drying device for hollow ceramic moldings
EP2098811A2 (en) * 2008-03-07 2009-09-09 Hans Lingl Anlagenbau und Verfahrenstechnik GmbH & Co. KG Tunnel dryer for drying preforms, with air entry holes in cross-spaced and opposite arrangement, and tunnel module for a tunnel dryer
FR2940830A1 (en) * 2009-01-08 2010-07-09 Keyria Ventilating method for drying raw and humid products to fabricate e.g. bricks, in terracotta industry, involves allowing products to be subjected to longitudinal circulation of air/circulation of agitating air, during product displacement
CN102954673A (en) * 2011-08-31 2013-03-06 烟台龙源电力技术股份有限公司 Dryer for drying materials by gas
ITUB20153865A1 (en) * 2015-09-17 2017-03-17 Stefano Capaccioli HIGH SPEED DRYER FOR BRICKS AND PROCEDURE FOR THEIR PRODUCTION
CN114294931A (en) * 2021-11-16 2022-04-08 长沙汉创新材料科技有限公司 Drying machine
CN115143746A (en) * 2022-07-25 2022-10-04 广东技术师范大学 High-power module production heap is heated and is dried by fire dehydrating unit

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DE3817972A1 (en) * 1988-05-27 1989-11-30 Erlus Baustoffwerke Method and device for drying newly moulded perforated bricks
DE4002643A1 (en) * 1990-01-30 1991-08-08 Meindl Josef Ohg Ceramic tile tunnel dryer - uses platforms of trolleys to form base of channel with structured air flow
DE9005787U1 (en) * 1990-05-21 1990-08-02 Rösler, Manfred, 7343 Kuchen Circulating air dryer
DE4412353C2 (en) * 1994-04-11 1996-04-18 Keller Gmbh Tunnel dryer for drying ceramic moldings
DE102007062851A1 (en) 2007-11-27 2009-05-28 Robert Thomas Metall- Und Elektrowerke Gmbh & Co. Kg Dryers for perforated ceramic moldings

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DE3049162A1 (en) * 1980-12-24 1982-07-15 Keramikindustrieanlagen W.Strohmenger GmbH & Co KG, 8524 Neunkirchen Ceramic item drying equipment - has hollow walls with fans and air holes on inside
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DE2320600B2 (en) * 1973-04-24 1975-07-10 Werner 8521 Neunkirchen Strohmenger Drying device for ceramic goods
AT325494B (en) * 1973-06-19 1975-10-27 Leitl Werke Bauhuette PROCESS FOR DRYING HOLLOW OR. PERFORATED BRICKS AND DEVICE FOR CARRYING OUT THE PROCESS
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DE416312C (en) * 1921-09-12 1925-07-13 Pilade Barducci Drying chamber
FR1191253A (en) * 1957-02-20 1959-10-19 Drying facility
AT283215B (en) * 1968-05-03 1970-07-27 Eisenmann Kg Machinenbau Ges Continuous dryer
DE1927839A1 (en) * 1969-05-31 1970-12-03 Meierling Dipl Ing Heinrich Wi Drying installation for ordinary ceramics
DE2600724B1 (en) * 1976-01-09 1977-03-17 Keller Ofenbau Gmbh Air circulation device for drying systems
DE2828247A1 (en) * 1978-06-28 1980-01-03 Rolf Pfisterer Continuously operating timber drying oven - uses blowers and heat exchanger for circulating drying gas
FR2480921A1 (en) * 1980-04-18 1981-10-23 Duc Francois Fruit drying chamber containing stationary carriages - uses reversible hot air circulating system including control of adjustable double air flaps
DE3049162A1 (en) * 1980-12-24 1982-07-15 Keramikindustrieanlagen W.Strohmenger GmbH & Co KG, 8524 Neunkirchen Ceramic item drying equipment - has hollow walls with fans and air holes on inside
US4357762A (en) * 1981-02-24 1982-11-09 Fuchs & Co. Aktiengesellschaft Fur Elektrodraht-Erzeugung Und Maschinenbau Apparatus for controlling the ventilation effect on material dried in a tunnel drying plant

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0343618A2 (en) * 1988-05-27 1989-11-29 Erlus Baustoffwerke AG Process and apparatus for drying hollow block preforms
EP0343618A3 (en) * 1988-05-27 1990-08-22 Erlus Baustoffwerke AG Process and apparatus for drying hollow block preforms
EP0676605A1 (en) * 1994-04-11 1995-10-11 Keller GmbH Support for ceramic freshly shaped bodies to be dried, such as hollow blocks, and freshly shaped body support arrangement
DE4412352A1 (en) * 1994-04-11 1995-10-26 Keller Gmbh Tunnel dryer for ceramic mouldings has improved air movement for drying low brick or tile stacks
DE4412352C2 (en) * 1994-04-11 1998-04-30 Keller Gmbh Tunnel dryer for drying ceramic moldings
WO1997005437A1 (en) * 1995-07-27 1997-02-13 Novokeram Max Wagner Gmbh Process and device for drying ceramic green bricks
DE29721763U1 (en) * 1997-12-10 1999-04-08 Novokeram Max Wagner GmbH, 86381 Krumbach Drying device for hollow ceramic moldings
EP2098811A2 (en) * 2008-03-07 2009-09-09 Hans Lingl Anlagenbau und Verfahrenstechnik GmbH & Co. KG Tunnel dryer for drying preforms, with air entry holes in cross-spaced and opposite arrangement, and tunnel module for a tunnel dryer
EP2098811A3 (en) * 2008-03-07 2014-08-27 Hans Lingl Anlagenbau und Verfahrenstechnik GmbH & Co. KG Tunnel dryer for drying preforms, with air entry holes in cross-spaced and opposite arrangement, and tunnel module for a tunnel dryer
FR2940830A1 (en) * 2009-01-08 2010-07-09 Keyria Ventilating method for drying raw and humid products to fabricate e.g. bricks, in terracotta industry, involves allowing products to be subjected to longitudinal circulation of air/circulation of agitating air, during product displacement
CN102954673A (en) * 2011-08-31 2013-03-06 烟台龙源电力技术股份有限公司 Dryer for drying materials by gas
ITUB20153865A1 (en) * 2015-09-17 2017-03-17 Stefano Capaccioli HIGH SPEED DRYER FOR BRICKS AND PROCEDURE FOR THEIR PRODUCTION
CN114294931A (en) * 2021-11-16 2022-04-08 长沙汉创新材料科技有限公司 Drying machine
CN115143746A (en) * 2022-07-25 2022-10-04 广东技术师范大学 High-power module production heap is heated and is dried by fire dehydrating unit

Also Published As

Publication number Publication date
DE3277450D1 (en) 1987-11-12
EP0089408B1 (en) 1987-10-07
DE3210652A1 (en) 1983-10-06
ES8400192A1 (en) 1983-10-16
ES518165A0 (en) 1983-10-16
EP0089408A3 (en) 1985-03-06
DE3210652C2 (en) 1993-03-11

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