EP0024475A1 - Process and apparatus for controlling the ventilation of an object to be dryed in a drying tunnel - Google Patents

Process and apparatus for controlling the ventilation of an object to be dryed in a drying tunnel Download PDF

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Publication number
EP0024475A1
EP0024475A1 EP80102467A EP80102467A EP0024475A1 EP 0024475 A1 EP0024475 A1 EP 0024475A1 EP 80102467 A EP80102467 A EP 80102467A EP 80102467 A EP80102467 A EP 80102467A EP 0024475 A1 EP0024475 A1 EP 0024475A1
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EP
European Patent Office
Prior art keywords
tunnel
air
air guide
dryer
longitudinal direction
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Granted
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EP80102467A
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German (de)
French (fr)
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EP0024475B1 (en
Inventor
Claudio Eustacchio
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Vogel and Noot Industrieanlagenbau GmbH
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Fuchs & Co AG fur Elektrodraht-Erzeugung und Maschinenbau
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Priority to AT80102467T priority Critical patent/ATE5100T1/en
Publication of EP0024475A1 publication Critical patent/EP0024475A1/en
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    • 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
    • F26B21/028—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 air valves, movable baffles or nozzle arrangements
    • 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
    • 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

Definitions

  • the invention relates to a method and a device for controlling the ventilation for a dry material in a tunnel dryer, in particular for brick blanks arranged in settling positions, which are moved through the dryer against the air flow.
  • the air velocity of the drying air aforementioned by the working on the countercurrent principle tunnel dryer type is about 0.5 to 2.0 m / sec, with the air due to their heat up mun g primarily in the upper section of the tunnel along moved so that the in the lower cross-section and dry material in the middle sections of the tunnel dries very slowly.
  • the dry material Since the water on the surface of the dry material is evaporated faster than can be replenished through the capillaries of the dry material with continuous aeration of the dry material, the dry material begins to dry out quickly on the surface, so that it shrinks more quickly on the surface than inside. This can cause damage such as cracks, cracks, etc. to the dry goods.
  • 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 avoids the above-described disadvantages of permanent ventilation, and the cars are also ventilated between the circulation fans.
  • the invention is therefore based on the object of creating a tunnel dryer in accordance with the generic term, in which drying is intensified by improved control of the ventilation without the need for energy-intensive circulation fans.
  • the dryer car and it only low layered dry material available large free cross-section through which the dry air usfahrseite correspondingly slowly from the A or moved sparger for retraction or suction device, transverse air deflectors disposed formed streamlined and the inflowing compressed air to which Deflect the dry goods moving under the air guide bodies in the counterflow principle.
  • the air is forced to enter the free spaces and the dry goods in order to flow through them.
  • the air guiding devices are mounted on movable slides, which, like the circulation fans in the known dryers, can be moved back and forth a few meters and thus result in a homogeneous supply of dry air at high speed .
  • Drying is intensified by the proposed control of the ventilation of the drying material at controllable intervals without the need for energy-consuming circulation fans.
  • the dry air flows relatively slowly through the dryer tunnel, so that the control of the moisture gradient can be carried out in a simple manner in accordance with the requirements placed on the dry material. Due to the advantageous profiling of the air guiding bodies and because they can be moved in the longitudinal direction, a corresponding flow profile can be formed so that the air flows through the drying tunnel in a wave shape.
  • the uniform drying of the drying material is ensured by the fact that the dryers are moved back and forth during the drying process and the drying material itself is conveyed to the drying air in the countercurrent principle.
  • the air guiding bodies are designed as hollow bodies, heating would be conceivable, or an air pressure system could be provided within the air guiding bodies, by means of which an influence on the vacuum or overpressure is applied air flowing through the tunnel dryer would be possible via nozzles or the like.
  • a tunnel dryer 1 is shown schematically in FIGS. 1 and 2.
  • This tunnel dryer 1 has a gate 2 on its left entry side with respect to the figures and a gate 3 on its right exit side.
  • an injection opening 4 In the area of the exit side there is an injection opening 4, to which an injection nozzle 5 is connected, which is connected to an injection device (not shown) Connection is established. Compressed air is introduced into the tunnel dryer 1 in the direction of the arrow 6 via this injection nozzle 5.
  • suction opening 7 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 nozzle 8.
  • This suction nozzle 8 is connected to a suction device, not shown, which ensures that the air is extracted as moist exhaust air in the direction of arrow 9 from the tunnel dryer 1.
  • the figures also show dryer cars 10 which are moved continuously on rails 11 by means of a drive (not shown) in the direction of the arrows 12.
  • the drying material 13 On the dryer car is the drying material 13, which in the exemplary embodiments shown is formed by brick moldings which are stacked.
  • air guide bodies 14 which can be moved back and forth in the longitudinal direction of the tunnel dryer 1 by means of slides 15 on rails 16. 1, can be connected to each other by a coupling 17 , so that only a common drive is required, or, as shown in FIG. 2, can be moved independently of one another, so that the The distance between two adjacent air guiding bodies can be set as desired. As a result, the flow profile of the compressed air flow can be changed.
  • the air guide bodies 14 and 18 are designed as hollow bodies and have a streamlined profile, so that on the one hand they ensure that the air is deflected downward to the dry material 13, but on the other hand prevent a disturbance of the flow by formation of eddies or the like.
  • the air flow 20 which is indicated by arrows in both figures, is directed downwards between the stack of bricks and passes through the holes in the bricks, so that these are ventilated not only on their surface but also in the core and thus from the inside and not only dry from the outside. Since the tunnel cross section in the area of the air guiding bodies 14, 18 is closed over its larger section by the air guiding bodies and the passage cross section is thus considerably reduced, the air flow accelerates in the area of the air guiding bodies, so that intensive drying is achieved.

Abstract

1. A process for controlling the ventilation of an object to be dried in a drying tunnel, in particular for brick blanks arranged in layers, which is moved through the drier in opposite direction of the air current, in which process heated air is introduced under excess pressure in the tunnel in the area of the outlet of the tunnel, in which the air from the tunnel section above the layers is deflected downwards to the layers in several areas in longitudinal direction of the tunnel by means of air deflecting means and is removed from the tunnel in the area of the inlet, characterized in that the laminar air current caused by the pressure difference is moved through the object to be dried by means of air deflecting means which can be moved to and fro in longitudinal direction during drying.

Description

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zur Steuerung der Belüftung für ein Trockengut in einem Tunneltrockner, insbesondere für in Setzlagen angeordnete Ziegelrohlinge, die durch den Trockner entgegen der Luftströmung hindurchbewegt werden.The invention relates to a method and a device for controlling the ventilation for a dry material in a tunnel dryer, in particular for brick blanks arranged in settling positions, which are moved through the dryer against the air flow.

In Tunneltrocknern der obenbeschriebenen 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 Trockentunnel 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, appropriately large wagons are conveyed in the longitudinal direction, on which the dry material is deposited in stages. The air necessary to discharge the moisture of the dry material is directed through the tunnel dryer against the direction of movement of the wagons. Dryers are known in which the length of the dryer Additional hot air devices are provided in the tunnel, or in which the air is wholly or partly removed from the drying tunnel, heated and then fed back in.

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 Erwär- mung 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 velocity of the drying air aforementioned by the working on the countercurrent principle tunnel dryer type is about 0.5 to 2.0 m / sec, with the air due to their heat up mun g primarily in the upper section of the tunnel along moved so that the in the lower cross-section and dry material 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 Trockentunnel 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.To improve the production capacity of the tunnel dryer, it is known to provide circulation fans for the dry air along the drying 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 nachgefördert werden kann, beginnt das Trockengut an der Oberfläche rasch auszutrocknen, so daß es an der Oberfläche rascher schwindet als im Inneren. Hierdurch können am Trockengut Schäden wie Risse, Sprünge usw. entstehen.Since the water on the surface of the dry material is evaporated faster than can be replenished through the capillaries of the dry material with continuous aeration of the dry material, the dry material begins to dry out quickly on the surface, so that it shrinks more quickly on the surface than inside. 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 obenbeschriebenen Nachteile der dauernden Belüftung vermieden, und die Wagen werden auch zwischen den Umwälzventilatoren belüftet.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 avoids the above-described disadvantages of permanent ventilation, and the cars are also ventilated between the circulation fans.

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.There have also become known tunnel dryers with a flat tunnel, in which only a low layer of dry material, about 0.2 to 0.5 meters, is dried in wide tunnels in the countercurrent principle and the circulation fans are arranged fixedly or movably above the dry material.

Bei den bekannten flachen Tunneltrocknern 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, significantly faster throughput times are achieved than in larger-scale tunnel dryers, the air speed in the tunnel dryers being up to 12.0 m / sec.

Aufgrund dieser hohen Luftgeschwindigkeit ist die Steuerung des Feuchtegefälles im Tunneltrockner sehr schwierig, so daß mit diesen Tunneltrocknern nur relativ unempfindliches Trockengut getrocknet werden kann.Because of this high air speed, the control of the moisture gradient in the tunnel dryer is very difficult, so that only relatively insensitive dry material can be dried with these tunnel dryers.

Während der Nachteil der Tunneltrockner mit Umwälzventilatoren in dem hohen Energieaufwand besteht, welcher zur Belüftung des Trockengutes aufgebracht werden muß, ergibt sich ein Nachteil bei flachen Tunneltrocknern ohne Umwälzung durch die hohe Luftgeschwindigkeit, durch welche die Steuerung des Trockenprozesses wesentlich erschwert wird.While the disadvantage of tunnel dryers with circulation fans is the high energy expenditure that has to be applied to ventilate the dry material, there is a disadvantage with flat tunnel dryers without circulation due to the high air speed, which makes the control of the drying process much more difficult.

Der Erfindung liegt daher die Aufgabe zugrunde, einen Tunneltrockner gemäß dem Gattungsbegriff zu schaffen, bei welchem die Trocknung durch eine verbesserte Steuerung der Belüftung intensiviert wird, ohne daß hierfür energieaufwendige Umwälzventilatoren benötigt werden.The invention is therefore based on the object of creating a tunnel dryer in accordance with the generic term, in which drying is intensified by improved control of the ventilation without the need for energy-intensive circulation fans.

Diese Aufgabe wird erfindungsgemäß durch die im Kennzeichen der Ansprüche 1 bzw. 5 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 5, 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 nur niedrig geschichteten Trockengut verfügbare große freie Querschnitt, durch welchen sich die Trockenluft entsprechend langsam von der Ausfahrseite bzw. Einblaseinrichtung zur Einfahrseite bzw. Absaugeinrichtung bewegt, querliegende Luftleitkörper angeordnet, welche strömungsgünstig ausgebildet sind und die anströmende Druckluft zu dem sich unter den Luftleitkörpern im Gegenstromprinzip hindurch bewegenden Trockengut umlenken. Die Luft ist dadurch gezwungen, in die frei bleibenden Räume und in das Trockengut einzutreten, um dieses zu durchströmen. Um die Beaufschlagung gleichmäßig über das flächenmäßig angeordnete Trockengut im Trocknertunnel zu verteilen, sind die Luftleitvorrichtungen auf verfahrbaren Schlitten montiert, die gleich den Umwälzlüftern in den bekannten Trocknern einige Meter vor und zurück bewegbar sind und somit eine homogene Beaufschlagung des Trockengutes mit Trockenluft von hoher Geschwindigkeit bewirken.According to the invention are in the flat tunnel dryer the dryer car and it only low layered dry material available large free cross-section through which the dry air usfahrseite correspondingly slowly from the A or moved sparger for retraction or suction device, transverse air deflectors disposed formed streamlined and the inflowing compressed air to which Deflect the dry goods moving under the air guide bodies in the counterflow principle. As a result, the air is forced to enter the free spaces and the dry goods in order to flow through them. In order to distribute the load evenly over the area of the dry goods in the dryer tunnel, the air guiding devices are mounted on movable slides, which, like the circulation fans in the known dryers, can be moved back and forth a few meters and thus result in a homogeneous supply of dry air at high speed .

Durch die vorgeschlagene Steuerung der Belüftung des Trockengutes in steuerbaren Intervallen wird die Trocknung intensiviert, ohne daß dazu energieverbrauchende Umwälzventilatoren benötigt werden. Die Trockenluft strömt gleichzeitig relativ langsam durch den Trocknertunnel, so daß die Steuerung des Feuchtegefälles entsprechend den Anforderungen, die durch das Trockengut gestellt werden, in einfacher Weise erfolgen kann. Durch die vorteilhafte Profilierung der Luftleitkörper sowie durch deren Verfahrbarkeit in Längsrichtung kann ein entsprechendes Strömungsprofil ausgebildet werden, so daß die Luft wellenförmig den Trockentunnel durchströmt. Die gleichmäßige Trocknung des Trockengutes wird dadurch gewährleistet, daß die Trockner während des Trocknungsvorganges hin- und herbewegt werden und das Trockengut selbst im Gegenstromprinzip zur Trocknungsluft gefördert wird. Da die Luftleitkörper als Hohlkörper ausgebildet sind, wäre eine Beheizung denkbar, oder es könnte ein Luftdrucksystem innerhalb der Luftleitkörper vorgesehen sein, mittels welchem durch Unterdruck- bzw. Uberdruckbeaufschlagung eine Einflußnahme auf die den Tunneltrockner durchströmende Luft über Düsen oder dgl. möglich wäre.Drying is intensified by the proposed control of the ventilation of the drying material at controllable intervals without the need for energy-consuming circulation fans. At the same time, the dry air flows relatively slowly through the dryer tunnel, so that the control of the moisture gradient can be carried out in a simple manner in accordance with the requirements placed on the dry material. Due to the advantageous profiling of the air guiding bodies and because they can be moved in the longitudinal direction, a corresponding flow profile can be formed so that the air flows through the drying tunnel in a wave shape. The uniform drying of the drying material is ensured by the fact that the dryers are moved back and forth during the drying process and the drying material itself is conveyed to the drying air in the countercurrent principle. Since the air guiding bodies are designed as hollow bodies, heating would be conceivable, or an air pressure system could be provided within the air guiding bodies, by means of which an influence on the vacuum or overpressure is applied air flowing through the tunnel dryer would be possible via nozzles or the like.

Weitere Merkmale, Einzelheiten und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung von bevorzugten Ausführungsbeispielen anhand der Zeichnung. Darin zeigen die Figuren zwei unterschiedliche Ausführungsbeispiele für die in dem Tunneltrockner angeordneten Luftleitkörper, durch welche das mit Pfeilen angedeutete Strömungsbild erzielt wird.Further features, details and advantages of the invention result from the following description of preferred exemplary embodiments with reference to the drawing. The figures show two different exemplary embodiments of the air guide bodies arranged in the tunnel dryer, by means of which the flow pattern indicated by arrows is achieved.

In den Figuren 1 und 2 ist in schematischer Weise ein Tunneltrockner 1 dargestellt. Dieser Tunneltrockner 1 besitzt an seiner in Bezug auf die Figuren linken Einfahrseite ein Tor 2 und auf seiner rechten Ausfahrseite ein Tor 3. Im Bereich der Ausfahrseite befindet sich eine Einblasöffnung 4, an welche ein Einblasstutzen 5 angeschlossen ist, welcher mit einer nicht dargestellten Einblaseinrichtung in Verbindung steht. Über diesen Einblasstutzen 5 wird Druckluft in Richtung des Pfeiles 6 in den Tunneltrockner 1 eingeleitet.A tunnel dryer 1 is shown schematically in FIGS. 1 and 2. This tunnel dryer 1 has a gate 2 on its left entry side with respect to the figures and a gate 3 on its right exit side. In the area of the exit side there is an injection opening 4, to which an injection nozzle 5 is connected, which is connected to an injection device (not shown) Connection is established. Compressed air is introduced into the tunnel dryer 1 in the direction of the arrow 6 via this injection nozzle 5.

Im Bereich der Einfahrseite befindet sich im oberen Teil des Tunneltrockners 1 eine Absaugöffnung 7, welche mit einem Absaugstutzen 8 verbunden ist. Dieser Absaugstutzen 8 steht mit einer nicht dargestellten Absaugeinrichtung in Verbindung, welche dafür sorgt, daß die Luft 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 nozzle 8. This suction nozzle 8 is connected to a suction device, not shown, which ensures that the air is extracted as moist exhaust air in the direction of arrow 9 from the tunnel dryer 1.

Die Figuren zeigen ferner Trocknerwagen 10, welche auf Schienen 11 mittels eines nicht dargestellten Antriebes in Richtung der Pfeile 12 kontinuierlich hindurchbewegt werden. Auf den Trocknerwagen befindet sich das Trockengut 13, welches bei den dargestellten Ausführungsbeispielen von Ziegelformlingen gebildet ist, die zu Stapeln gesetzt sind.The figures also show dryer cars 10 which are moved continuously on rails 11 by means of a drive (not shown) in the direction of the arrows 12. On the dryer car is the drying material 13, which in the exemplary embodiments shown is formed by brick moldings which are stacked.

Im freien Querschnitt des flachen Tunneltrockners 1 oberhalb des Trockengutes 13 befinden sich Luftleitkörper 14, welche mittels Schlitten 15 auf Schienen 16 in Längsrichtung des Tunneltrockners 1 hin und her verfahrbar sind. Diese Luftleitkörper 14 können, wie bei dem Ausführungsbeispiel gemäß Fig. 1 gezeigt, untereinander durch eine Koppel 17 verbunden sein, so daß nur ein gemeinsamer Antrieb benötigt wird, oder, wie in der Fig. 2 gezeigt, voneinander unabhängig verfahrbar sein, so daß der Abstand zwischen zwei benachbarten Luftleitkörpern beliebig einstellbar ist. Hierdurch läßt sich das Strömungsprofil der Druckluftströmung verändern.In the free cross section of the flat tunnel dryer 1 above of the dry material 13 there are air guide bodies 14 which can be moved back and forth in the longitudinal direction of the tunnel dryer 1 by means of slides 15 on rails 16. 1, can be connected to each other by a coupling 17 , so that only a common drive is required, or, as shown in FIG. 2, can be moved independently of one another, so that the The distance between two adjacent air guiding bodies can be set as desired. As a result, the flow profile of the compressed air flow can be changed.

Die Luftleitkörper 14 bzw. 18 sind als Hohlkörper ausgebildet und besitzen ein strömungsgünstiges Profil, so daß sie einerseits dafür sorgen, daß die Luft nach unten zu dem Trockengut 13 abgelenkt wird, andererseits aber eine Störung der Strömung durch Ausbildung von Wirbeln oder dgl. verhindern.The air guide bodies 14 and 18 are designed as hollow bodies and have a streamlined profile, so that on the one hand they ensure that the air is deflected downward to the dry material 13, but on the other hand prevent a disturbance of the flow by formation of eddies or the like.

Bei dem linken Luftleitkörper 18 gemäß Fig. 2 ist schematisch angedeutet, daß dieser durch ein unteres ausfahrbares Teil 19 in seiner Höhe verstellbar ist, so daß der Zwischenraum zwischen dem Luftleitkörper und dem Stapelgut 13 entsprechend der Höhe des Stapelgutes verringert werden kann. Die Luftströmung 20, die in beiden Figuren durch Pfeile angedeutet ist, wird nach unten zwischen die Ziegelstapel geleitet und gelangt durch die Löcher in die Ziegel, so daß diese nicht nur an ihrer Oberfläche,sondern auch im Kern belüftet werden und damit von innen und nicht nur von außen trocknen. Da der Tunnelquerschnitt im Bereich der Luftleitkörper 14, 18 über seinen größeren Abschnitt von den Luftleitkörpern verschlossen ist und der Durchtrittsquerschnitt somit erheblich verkleinert wird, findet im Bereich der Luftleitkörper eine Beschleunigung der Luftströmung statt, so daß eine intensive Trocknung erzielt wird.2 is indicated schematically that its height can be adjusted by a lower extendable part 19, so that the space between the air guide and the stacked goods 13 can be reduced in accordance with the height of the stacked goods. The air flow 20, which is indicated by arrows in both figures, is directed downwards between the stack of bricks and passes through the holes in the bricks, so that these are ventilated not only on their surface but also in the core and thus from the inside and not only dry from the outside. Since the tunnel cross section in the area of the air guiding bodies 14, 18 is closed over its larger section by the air guiding bodies and the passage cross section is thus considerably reduced, the air flow accelerates in the area of the air guiding bodies, so that intensive drying is achieved.

BEZUGSZEICHENLISTEREFERENCE SIGN LIST

  • 1 Tunneltrockner1 tunnel dryer
  • 2 Tor Einfahrseite2 gate entry side
  • 3 Tor Ausfahrseite3 gate exit side
  • 4 Einblasöffnung4 injection opening
  • 5 Einblasstutzen5 inlet spigots
  • 6 Druckluft6 compressed air
  • 7 Absaugöffnung7 suction opening
  • 8 Absaugstutzen8 extraction nozzles
  • 9 Druckluft9 compressed air
  • 10 Trockenwagen10 drying wagons
  • 11 Schiene11 rail
  • 12 Förderrichtung12 Direction of conveyance
  • 13 Trockengut13 dry goods
  • 14 Luftleitkörper14 air baffle
  • 15 Schlitten15 sledges
  • 16 Schiene16 rail
  • 17 Koppel17 paddocks
  • 18 Luftleitkörper18 air baffle
  • 19 ausfahrbares Teil19 extendable part
  • 20 Luftströmung20 air flow

Claims (13)

1. Verfahren zur Steuerung der Belüftung für ein Trockengut in einem Tunneltrockner, insbesondere für in Setzlagen angeordnete Ziegelrohlinge, die durch den Trockner entgegen der Luftströmung hindurchbewegt werden, dadurch gekennzeichnet, daß a) heiße Luft im Bereich der Ausfahrseite in den Tunnel mit Überdruck eingeleitet wird, b) die Luft aus dem sich oberhalb der Setzlagen befindlichen Tunnelquerschnitt in mehreren Bereichen in Tunnellängsrichtung nach unten zu den Setzlagen abgelenkt wird, und c) im Bereich der Einfahrseite aus dem Tunnel abgesaugt wird. 1. A method for controlling the ventilation for a dry material in a tunnel dryer, in particular for brick blanks arranged in settling positions, which are moved through the dryer against the air flow, characterized in that a) hot air is introduced into the tunnel with excess pressure in the area of the exit side, b) the air from the tunnel cross-section located above the setting layers is deflected downwards in several regions in the longitudinal direction of the tunnel to the setting layers, and c) is suctioned out of the tunnel in the area of the entry side. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Bereiche, an denen die Luft nach unten abgelenkt wird, während der Trocknung in Längsrichtung bewegt werden.2. The method according to claim 1, characterized in that the areas where the air is deflected downward are moved in the longitudinal direction during drying. 3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß die Bereiche, an denen die Luft nach unten abgelenkt wird, in Längsrichtung des Tunnels gleichmäßig hin- und herbewegt werden.3. The method according to claim 2, characterized in that the areas where the air is deflected downwards are moved back and forth evenly in the longitudinal direction of the tunnel. 4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Luft in Intervallen durch den Tunnel geleitet wird.4. The method according to any one of claims 1 to 3, characterized in that the air is passed through the tunnel at intervals. 5. Vorrichtung zur Durchführung des Verfahrens nach einem der Ansprüche 1 bis 4, gekennzeichnet durch 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 durch wenigstens einen Luftleitkörper (14, 18), der in dem sich oberhalb des Trockengutes (13) befindlichen Tunnelquerschnitt (1) angeordnet ist und die Luftströmung (20) zwangsweise durch das Trockengut (13) hindurchleitet.5. Apparatus for performing the method according to one of claims 1 to 4, characterized by a tunnel dryer (1) with an on the exit side (3) arranged blowing device (4, 5) for dry hot air and a suction device arranged on the entry side (2) (7, 8) for moist exhaust air and through at least one air guide (14, 18) 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) . 6. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß die Luftleitkörper den freien Tunnelquerschnitt vollständig ausfüllen.6. The device according to claim 6, characterized in that the air guide completely fill the free tunnel cross section. 7. Vorrichtung nach Anspruch 5 oder 6, dadurch gekennzeichnet, daß die Luftleitkörper (14, 18) ein strömungsgünstiges Anström-und Abströmprofil aufweisen, so daß die Luftströmung als gleichmäßige wellenförmige Laminarströmung durch das Trockengut (13) hindurchgeleitet wird.7. The device according to claim 5 or 6, characterized in that the air guide body (14, 18) 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). 8. Vorrichtung nach einem der Ansprüche 5 bis 7, dadurch gekennzeichnet, daß die Luftleitkörper (14, 18) auf verfahrbaren Schlitten (15) oder dgl. montiert sind.8. Device according to one of claims 5 to 7, characterized in that the air guide (14, 18) on movable Carriage (15) or the like. Are mounted. 9. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, daß die Schlitten (15) in Tunnellängsrichtung bewegbar sind.9. The device according to claim 8, characterized in that the carriage (15) are movable in the longitudinal direction of the tunnel. 10. Vorrichtung nach einem der Ansprüche 5 bis 8, dadurch gekennzeichnet, daß die Luftleitkörper (18) in der Höhe verstellbar sind.10. Device according to one of claims 5 to 8, characterized in that the air guide body (18) are adjustable in height. 11. Vorrichtung nach Anspruch 10, dadurch gekennzeichnet, daß die Luftleitkörper (18) durch Ergänzungsprofile (19) verlängerbar sind.11. The device according to claim 10, characterized in that the air guide body (18) can be extended by supplementary profiles (19). 12. Vorrichtung nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß die Luftleitkörper Hohlkörper (14, 18) sind.12. The device according to one of claims 1 to 11, characterized in that the air guide bodies are hollow bodies (14, 18). 13. Vorrichtung nach Anspruch 8 oder 9, dadurch gekennzeichnet, daß die Schlitten (15) einen ferngesteuerten programmierbaren Antrieb aufweisen.13. The apparatus of claim 8 or 9, characterized in that the carriage (15) have a remote-controlled programmable drive.
EP80102467A 1979-08-22 1980-05-06 Process and apparatus for controlling the ventilation of an object to be dryed in a drying tunnel Expired EP0024475B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80102467T ATE5100T1 (en) 1979-08-22 1980-05-06 METHOD AND DEVICE FOR CONTROLLING THE VENTILATION FOR A DRYING PRODUCT IN A TUNNEL DRYER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2934022 1979-08-22
DE19792934022 DE2934022A1 (en) 1979-08-22 1979-08-22 METHOD AND DEVICE FOR CONTROLLING THE VENTILATION FOR A DRY MATTER IN A TUNNEL DRYER

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EP0024475A1 true EP0024475A1 (en) 1981-03-11
EP0024475B1 EP0024475B1 (en) 1983-10-19

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EP (1) EP0024475B1 (en)
AT (1) ATE5100T1 (en)
DE (1) DE2934022A1 (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2161910A (en) * 1984-07-11 1986-01-22 Lingl Anlagenbau Tunnel dryer for bricks or the like
EP0390918A4 (en) * 1988-03-29 1990-07-31 Gpki Rybopromy Flota Installation for thermal treatment of products.
WO1991007265A1 (en) * 1989-11-18 1991-05-30 Dowty Seals Limited Cooling of sheet material
WO1993025360A1 (en) * 1992-06-15 1993-12-23 Wienerberger Ziegelindustrie Aktiengesellschaft Process and facility for drying and/or baking raw bricks
EP0709636A1 (en) * 1994-10-31 1996-05-01 Machinefabriek De Oude Rijn Pannerden B.V. A method and a device for cleaning a drying tunnel
CN102297434A (en) * 2010-06-16 2011-12-28 克莱德贝尔格曼干控制有限公司 Conveyor device and method for conveying hot material
CN104215052A (en) * 2014-09-03 2014-12-17 江苏宇达环保科技股份有限公司 SCR (Selective Catalytic Reduction) catalyst drying system
CN114294751A (en) * 2021-12-31 2022-04-08 陇东学院 Ventilating and damp-proof cave dwelling
CN116766372A (en) * 2023-06-14 2023-09-19 河北国亮新材料股份有限公司 Heat treatment process of refractory material blank

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
DE4428001C2 (en) * 1994-08-08 1998-10-01 Opel Alfred Dipl Ing Fh Vacuum dryer for sawn timber and process for drying wood
NL1002267C2 (en) * 1996-02-07 1997-08-08 Raadgevend Bureau Kortenbach B Space and method for thawing products.

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FR569094A (en) * 1922-05-23 1924-04-07 Drying devices and methods
US1645738A (en) * 1926-04-07 1927-10-18 Frank C Chapman Drier
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DE2320600A1 (en) * 1973-04-24 1974-11-14 Werner Strohmenger Pusher-type tunnel drier - has blowers running on rails above and below ceramic ware

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FR569094A (en) * 1922-05-23 1924-04-07 Drying devices and methods
US1645738A (en) * 1926-04-07 1927-10-18 Frank C Chapman Drier
US1855401A (en) * 1930-04-19 1932-04-26 Theodore T Leonard Dry kiln
GB791702A (en) * 1955-09-26 1958-03-12 Anthony Bower Adams Improvements relating to dryers
FR1267201A (en) * 1960-06-04 1961-07-21 Fan Systems Ltd Method and installation for drying objects
DE1729230B1 (en) * 1967-12-11 1971-06-16 Keller Spezialtechnik Gmbh Tunnel dryer, especially for ceramic products
BE767898A (en) * 1971-06-01 1971-11-03 Samenwerkende Steennijveraars PROCEDURE FOR DRYING FORMED CLAY MASSES AND EQUIPMENT USING SUCH PROCEDURE.
DE2320600A1 (en) * 1973-04-24 1974-11-14 Werner Strohmenger Pusher-type tunnel drier - has blowers running on rails above and below ceramic ware

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2161910A (en) * 1984-07-11 1986-01-22 Lingl Anlagenbau Tunnel dryer for bricks or the like
EP0390918A4 (en) * 1988-03-29 1990-07-31 Gpki Rybopromy Flota Installation for thermal treatment of products.
EP0390918A1 (en) * 1988-03-29 1990-10-10 Gosudarstvenny Proektno-Konstruktorsky Institut Rybopromyslovogo Flota "Giprorybflot" Installation for thermal treatment of products
WO1991007265A1 (en) * 1989-11-18 1991-05-30 Dowty Seals Limited Cooling of sheet material
WO1993025360A1 (en) * 1992-06-15 1993-12-23 Wienerberger Ziegelindustrie Aktiengesellschaft Process and facility for drying and/or baking raw bricks
NL9401799A (en) * 1994-10-31 1996-06-03 Oude Rijn Pannerden Bv Maschf Method and device for cleaning a drying tunnel.
EP0709636A1 (en) * 1994-10-31 1996-05-01 Machinefabriek De Oude Rijn Pannerden B.V. A method and a device for cleaning a drying tunnel
CN102297434A (en) * 2010-06-16 2011-12-28 克莱德贝尔格曼干控制有限公司 Conveyor device and method for conveying hot material
CN102297434B (en) * 2010-06-16 2016-02-24 克莱德贝尔格曼干控制有限公司 For the conveying device of residue of combustion and method and the combustion apparatus with this device
CN104215052A (en) * 2014-09-03 2014-12-17 江苏宇达环保科技股份有限公司 SCR (Selective Catalytic Reduction) catalyst drying system
CN104215052B (en) * 2014-09-03 2016-04-20 江苏宇达环保科技股份有限公司 A kind of SCR catalyst drying system
CN114294751A (en) * 2021-12-31 2022-04-08 陇东学院 Ventilating and damp-proof cave dwelling
CN114294751B (en) * 2021-12-31 2023-03-14 陇东学院 Ventilating and damp-proof cave dwelling
CN116766372A (en) * 2023-06-14 2023-09-19 河北国亮新材料股份有限公司 Heat treatment process of refractory material blank
CN116766372B (en) * 2023-06-14 2024-01-05 河北国亮新材料股份有限公司 Heat treatment process of refractory material blank

Also Published As

Publication number Publication date
DE2934022C2 (en) 1988-01-21
DE2934022A1 (en) 1981-03-26
ATE5100T1 (en) 1983-11-15
EP0024475B1 (en) 1983-10-19

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