EP0024475B1 - 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 PDFInfo
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- EP0024475B1 EP0024475B1 EP80102467A EP80102467A EP0024475B1 EP 0024475 B1 EP0024475 B1 EP 0024475B1 EP 80102467 A EP80102467 A EP 80102467A EP 80102467 A EP80102467 A EP 80102467A EP 0024475 B1 EP0024475 B1 EP 0024475B1
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- air
- tunnel
- accordance
- deflecting means
- moved
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- 238000001035 drying Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000009423 ventilation Methods 0.000 title claims abstract description 8
- 239000011449 brick Substances 0.000 claims abstract description 6
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 230000002349 favourable effect Effects 0.000 claims 1
- 239000000463 material Substances 0.000 description 24
- 238000007664 blowing Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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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
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- 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
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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
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, according to the preamble of claims 1 and 4.
- 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 back in.
- the air speed of the dry air through the tunnel dryer of the aforementioned type working in the countercurrent principle is approximately 0.5 to 2.0 m / sec, the air moving primarily along the upper cross section of the tunnel due to its heating, so that this is in the lower cross section and in the middle Dry sections of the tunnel dry very slowly.
- the dry material Since the water on the surface of the dry material is evaporated more rapidly than can be replenished by the capillaries of the dry material with continuous ventilation 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 disadvantages of permanent ventilation described above, and the cars are also ventilated between the circulation fans.
- DE-A-2 320 600 From DE-A-2 320 600 a method is known in which warm air is drawn in in the area of the furnace outlet.
- the warm air is transported through the tunnel dryer with the aid of several circulation fans, which are arranged to be movable along rails both on the floor and on the ceiling of the tunnel dryer.
- the air is sucked in and blown out after compression by such circulation fans arranged inside the tunnel dryer. This results in local air circulation.
- the invention is therefore based on the object of intensifying drying by developing the tunnel driers formed with air deflecting bodies by means of improved ventilation control, without the need for energy-intensive circulation fans.
- transverse air deflection bodies are arranged, which are streamlined and deflect the incoming compressed air to the dry goods moving under the air deflection bodies in the counterflow principle.
- the air deflection bodies are mounted on movable slides, which, like the circulation fans, can be moved back and forth a few meters in the known dryers.
- 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 deflecting 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 deflecting bodies are designed as hollow bodies, heating would be conceivable, or an air pressure system could be provided within the air deflecting bodies, by means of which an influence on the air flowing through the tunnel dryer via nozzles or the like would be possible by applying vacuum or overpressure.
- a tunnel dryer 1 is shown schematically.
- This tunnel dryer 1 has a gate 2 on its left-hand entry side with respect to the figures and a gate 3 on its right-hand exit side 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 deflection 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 one another by a coupling 17, so that only a common drive is required, or, as shown in the figure, can be moved independently of one another so that the distance is freely adjustable between two adjacent air deflectors. As a result, the flow profile of the compressed air flow can be changed.
- the air deflectors 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, 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 downward 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 Area of the air deflecting body 14, 18 is closed over its larger section by the air deflecting body and the passage cross section is thus considerably reduced, the air flow in the area of the air deflecting body is accelerated, so that intensive drying is achieved.
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- Drying Of Solid Materials (AREA)
Abstract
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, gemäß dem Gattungsbegriff der Ansprüche 1 und 4.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, according to the preamble of
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 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, 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 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 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 aforementioned type working in the countercurrent principle is approximately 0.5 to 2.0 m / sec, the air moving primarily along the upper cross section of the tunnel due to its heating, so that this is in the lower cross section and in the middle Dry sections of the tunnel dry 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 more rapidly than can be replenished by the capillaries of the dry material with continuous ventilation 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 Nachteils 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 vermieden, und die Wagen werden auch zwischen den Umwälzventilatoren belüftet.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 disadvantages of permanent ventilation described above, and the cars are also ventilated between the circulation fans.
Aus der DE-A-2 320 600 ist ein Verfahren bekannt, bei dem Warmluft im Bereich des Ofenausganges angesaugt wird. Im einzelnen erfolgt nach der DE-A-2 320 600 der Warmlufttransport durch den Tunneltrockner mit Hilfe mehrerer Umwälzventilatoren, welche sowohl am Boden wie auch an der Decke des Tunneltrockners längs Schienen verfahrbar angeordnet sind. Durch derartige innerhalb des Tunneltrockners angeordnete Umwälzventilatoren wird die Luft angesaugt und nach Verdichtung ausgeblasen. Dadurch wird eine örtliche Luftumwälzung erzielt.From DE-A-2 320 600 a method is known in which warm air is drawn in in the area of the furnace outlet. In detail, according to DE-A-2 320 600, the warm air is transported through the tunnel dryer with the aid of several circulation fans, which are arranged to be movable along rails both on the floor and on the ceiling of the tunnel dryer. The air is sucked in and blown out after compression by such circulation fans arranged inside the tunnel dryer. This results in local air circulation.
Der Nachteil des Einsatzes derartiger Umwälzventilatoren besteht allerdings darin, daß dadurch die Luft mit einem Vielfachen der Durchsatzleistung über den Tunnelquerschnitt umgewälzt wird, was einen entsprechenden Leistungsbedarf zur Folge hat.The disadvantage of using such circulation fans is, however, that the air is circulated over the tunnel cross-section with a multiple of the throughput, which results in a corresponding power requirement.
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.
Schließlich ist aus der US-A-1 645738, insbesondere durch die dort dargestellte Fig. 3, ein Verfahren bekannt, bei welchem der durch den Tunneltrockner geführte Warmluftstrom in mehreren Bereichen über Luftleitkörper nach unten zum Trockengut abgelenkt wird. Durch diese herkömmlichen Luftleitkörper läßt sich jedoch keine gleichmäßige und intensive Trocknung des zu behandelnden Guts erzielen. Insbesondere läßt sich das Feuchtegefälle nicht entsprechend den Anforderungen, die durch das Trockengut gestellt werden, steuern.Finally, a method is known from US-A-1 645738, in particular through FIG. 3 shown there, in which the hot air flow guided through the tunnel dryer is deflected downward in several areas via air guide bodies to the dry material. However, these conventional air-guiding bodies do not permit uniform and intensive drying of the material to be treated. In particular, the moisture gradient cannot be controlled in accordance with the requirements imposed by the dry material.
Der Erfindung liegt daher die Aufgabe zugrunde, die Trocknung durch Weiterbildung der mit Luftablenkkörpern ausgebildeten Tunneltrocknern über eine verbesserte Steuerung der Belüftung zu intensivieren, ohne daß hierfür energieaufwendige Umwälzventilatoren benötigt werden.The invention is therefore based on the object of intensifying drying by developing the tunnel driers formed with air deflecting bodies by means of improved ventilation control, without the need for energy-intensive circulation fans.
Diese Aufgabe wird erfindungsgemäß durch die im Kennzeichen der Ansprüche 1 bzw. 4 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
Gemäß der Erfindung sind bei dem flachen Tunneltrockner der über dem Trocknerwagen und dem darauf nur niedrig geschichteten Trockengut verfügbare große freie Querschnitte, durch welchen sich die Trockenluft entsprechend langsam von der Ausfahrseite bzw. Einblaseinrichtung zur Einfahrseite bzw. Absaugeinrichtung bewegt, querliegende Luftablenkkörper angeordnet, welche strömungsgünstig ausgebildet sind und die anströmende Druckluft zu dem sich unter den Luftablenkkörpern im Gegenstromprinzip hindurch bewegenden Trokkengut 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 Luftablenkkörper auf verfahrbaren Schlitten montiert, die gleich den Umwälzlüftern in den bekannten Trocknern einige Meter vor und zurück bewegbar sind. Dadurch ergibt sich unter Verzicht auf gesonderte Umwälzgebläse eine Intensivierung des Trocknungsvorgangs, wobei die Trockenluft gerade wegen des Verzichts auf Umwälzgebläse entsprechend langsam von der Ausfahrseite bzw. Einblaseinrichtung zur Absaugeinrichtung bewegt wird. Damit wird das Gegenstromprinzip nicht beeinflußt und wird der Luftstrom an unterschiedlichen Stellen längs des Tunnelofens im Bereich der Luftablenkkörper zu erhöhter Geschwindigkeit gebracht, was eine intensive Umspülung des Trockenguts mit Warmluft zur Folge hat.According to the invention, in the case of the flat tunnel dryer, the large free cross-sections available through the dryer car and the drying material which is only layered low thereon, through which the drying air corresponds chend slowly from the exit side or blowing device to the entry side or suction device, transverse air deflection bodies are arranged, which are streamlined and deflect the incoming compressed air to the dry goods moving under the air deflection 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 admission evenly over the area of the dry goods in the dryer tunnel, the air deflection bodies are mounted on movable slides, which, like the circulation fans, can be moved back and forth a few meters in the known dryers. This results in an intensification of the drying process without the need for separate circulation fans, the drying air being moved from the extension side or blowing device to the suction device correspondingly slowly precisely because there is no circulation fan. This does not affect the counterflow principle and the air flow is brought to increased speed at different points along the tunnel furnace in the area of the air deflector, which results in intensive washing of the dry material with warm air.
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 Luftablenkkörper 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 Luftablenkkörper als Hohlkörper ausgebildet sind, wäre eine Beheizung denkbar, oder es könnte ein Luftdrucksystem innerhalb der Luftablenkkörper vorgesehen sein, mittels welchem durch Unterdruck- bzw. Überdruckbeaufschlagung 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 deflecting 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 deflecting bodies are designed as hollow bodies, heating would be conceivable, or an air pressure system could be provided within the air deflecting bodies, by means of which an influence on the air flowing through the tunnel dryer via nozzles or the like would be possible by applying vacuum or overpressure.
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 Luftablenkkörper, 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 for the air deflection bodies arranged in the tunnel dryer, by means of which the flow pattern indicated by arrows is achieved.
In den Fig. 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 Pfeils 6 in den Tunneltrockner 1 eingeleitet.1 and 2, a
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 Pfeils 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
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
Im freien Querschnitt des flachen Tunneltrockners 1 oberhalb des Trockengutes 13 befinden sich Luftablenkkörper 14, welche mittels Schlitten 15 auf Schienen 16 in Längsrichtung des Tunneltrockners 1 hin und her verfahrbar sind. Diese Luftablenkkörper 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. gezeigt, voneinander unabhängig verfahrbar sein, so daß der Abstand zwischen zwei benachbarten Luftablenkkörpern beliebig einstellbar ist. Hierdurch läßt sich das Strömungsprofil der Druckluftströmung verändern.In the free cross section of the
Die Luftablenkkörper 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 abgelenkt wird, andererseits aber eine Störung der Strömung durch Ausbildung von Wirbeln oder dgl. verhindern.The
Bei dem linken Luftablenkkörper 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 Luftablenkkörper 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 Luftablenkkörper 14, 18 über seinen größeren Abschnitt von den Luftablenkkörpern verschlossen ist und der Durchtrittsquerschnitt somit erheblich verkleinert wird, findet im Bereich der Luftablenkkörper eine Beschleunigung der Luftströmung statt, so daß eine intensive Trocknung erzielt wird.
Claims (8)
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 |
|---|---|---|---|
| DE19792934022 DE2934022A1 (en) | 1979-08-22 | 1979-08-22 | METHOD AND DEVICE FOR CONTROLLING THE VENTILATION FOR A DRY MATTER IN A TUNNEL DRYER |
| DE2934022 | 1979-08-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0024475A1 EP0024475A1 (en) | 1981-03-11 |
| EP0024475B1 true EP0024475B1 (en) | 1983-10-19 |
Family
ID=6079056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP80102467A Expired EP0024475B1 (en) | 1979-08-22 | 1980-05-06 | Process and apparatus for controlling the ventilation of an object to be dryed in a drying tunnel |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0024475B1 (en) |
| AT (1) | ATE5100T1 (en) |
| DE (1) | DE2934022A1 (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3425523A1 (en) * | 1984-07-11 | 1986-01-23 | Hans Lingl Anlagenbau Und Verfahrenstechnik Gmbh & Co Kg, 7910 Neu-Ulm | TUNNEL DRYER FOR BRICKS OR THE LIKE |
| JPH02503630A (en) * | 1988-03-29 | 1990-11-01 | ゴスダルストウェンヌイ、プロエクトノ‐コンストルクトルスキー、インスチツート、リボプロムイスロボボ、フロタ、“ギプロリブフロト” | Food heat treatment plant |
| GB8926113D0 (en) * | 1989-11-18 | 1990-01-10 | Dowty Malta Limited | Cooling of sheet material |
| 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 |
| ATA121992A (en) * | 1992-06-15 | 1996-08-15 | Wienerberger Ziegelind | METHOD FOR DRYING AND / OR BURNING BRICK BLanks |
| DE4428001C2 (en) * | 1994-08-08 | 1998-10-01 | Opel Alfred Dipl Ing Fh | Vacuum dryer for sawn timber and process for drying wood |
| NL9401799A (en) * | 1994-10-31 | 1996-06-03 | Oude Rijn Pannerden Bv Maschf | Method and device for cleaning a drying tunnel. |
| NL1002267C2 (en) * | 1996-02-07 | 1997-08-08 | Raadgevend Bureau Kortenbach B | Space and method for thawing products. |
| DE102010024020B4 (en) * | 2010-06-16 | 2019-08-01 | Clyde Bergemann Drycon Gmbh | Conveying means and method for conveying hot material |
| 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 |
| CN114294751B (en) * | 2021-12-31 | 2023-03-14 | 陇东学院 | Ventilating and damp-proof cave dwelling |
| 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 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE950450C (en) * | 1951-04-28 | 1956-10-11 | Siemens Ag | Drying or annealing furnace |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1420296A (en) * | 1922-06-20 | Drying kiln | ||
| 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. |
| DE2320600B2 (en) * | 1973-04-24 | 1975-07-10 | Werner 8521 Neunkirchen Strohmenger | Drying device for ceramic goods |
-
1979
- 1979-08-22 DE DE19792934022 patent/DE2934022A1/en active Granted
-
1980
- 1980-05-06 EP EP80102467A patent/EP0024475B1/en not_active Expired
- 1980-05-06 AT AT80102467T patent/ATE5100T1/en not_active IP Right Cessation
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE950450C (en) * | 1951-04-28 | 1956-10-11 | Siemens Ag | Drying or annealing furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE5100T1 (en) | 1983-11-15 |
| DE2934022A1 (en) | 1981-03-26 |
| DE2934022C2 (en) | 1988-01-21 |
| EP0024475A1 (en) | 1981-03-11 |
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