EP0089408B1 - 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

Info

Publication number
EP0089408B1
EP0089408B1 EP82110780A EP82110780A EP0089408B1 EP 0089408 B1 EP0089408 B1 EP 0089408B1 EP 82110780 A EP82110780 A EP 82110780A EP 82110780 A EP82110780 A EP 82110780A EP 0089408 B1 EP0089408 B1 EP 0089408B1
Authority
EP
European Patent Office
Prior art keywords
air
tunnel
dried
dryer
disposed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP82110780A
Other languages
German (de)
French (fr)
Other versions
EP0089408A3 (en
EP0089408A2 (en
Inventor
Eduard Steinacher
Claudio Eustacchio
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vogel and Noot Industrieanlagenbau GmbH
Original Assignee
Fuchs & Co GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fuchs & Co GmbH filed Critical Fuchs & Co GmbH
Publication of EP0089408A2 publication Critical patent/EP0089408A2/en
Publication of EP0089408A3 publication Critical patent/EP0089408A3/en
Application granted granted Critical
Publication of EP0089408B1 publication Critical patent/EP0089408B1/en
Expired legal-status Critical Current

Links

Images

Classifications

    • 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 carrying out the method according to the first part of claims 1 and 2, respectively.
  • 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 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 further hot air devices are provided over the length of the dryer tunnel, or in which the air is wholly or partially removed from the dryer tunnel, heated and then fed back in.
  • the air velocity 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 / s, 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 Dried material located in the middle sections of the tunnel dries very slowly.
  • longitudinally movable settling carriages are accommodated, which receive the moldings to be dried, while in the upper mixing room, fans are arranged at regular intervals, each of which has a suction opening for sucking in a drying medium and a suction opening arranged in the partition for sucking in the circulating medium Drying chamber are assigned.
  • the circulation medium heated in the mixing room is fed into the lower part of the drying chamber through side flaps. Since with such continuous aeration of the dry material the water on the surface of the dry material evaporates faster than this can be replenished by the capillaries of the dry material, the dry material begins to dry out more quickly, so that it shrinks on the surface faster than inside. This can cause damage such as cracks, cracks, etc. to the dry goods.
  • tunnel dryers have been developed in which the circulation fans are designed to be movable.
  • Such a tunnel dryer according to the preamble of claim 1 is known from DE-C-416 312.
  • the disadvantage of this tunnel dryer is that the dry air is not drawn in from the upper area of the dryer, where the warm, relatively fresh dry air is located, but from the depth, transverse to the main flow direction of the dry air.
  • the disadvantages of permanent ventilation described above are reduced in this tunnel dryer, the dry material is also washed around primarily on the outer surfaces, so that there is still a considerable difference in moisture between the inside and the outside of the dry material, which can lead to the formation of cracks.
  • the invention is therefore based on the object of providing a method and a device for ventilating dry material according to the generic terms, in which drying is intensified by improved ventilation and the brick blanks are dried uniformly.
  • the large free cross-section available above the dryer and the mostly dry layered dry goods on top of it, through which the dry air moves slowly from the exit side or blowing device to the entry side or suction device has transverse air circulation housings which are arranged 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 forwards and backwards a few meters in the dryer, so that the dry goods are homogeneously loaded through the cavities.
  • the air guiding 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.
  • drying is effected evenly and gently in the dry goods, so that the dry goods dry evenly on the outside and inside.
  • the dry air flows through the dryer tunnel relatively slowly, the circulation fan sucks in at the top of the side of the housing opposite the side where the dry hot air flows, so that the moisture gradient can be controlled in accordance with the requirements of the dry material can be done easily.
  • a suitable drying interval can be formed by the advantageous profiling of the circulating housing and air guide bodies and by their ability to be moved 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.
  • suction pipe 8 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.
  • This suction pipe 8 is connected to a suction device, not shown, which ensures that the air 20 is sucked out of the tunnel dryer 1 as moist exhaust air in the direction of the arrow 9.
  • 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 bricks have a percentage of holes that can vary from 15 to 60%, depending on the type of brick. The direction of the holes lies 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 circulation 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.
  • blow-out profiles 19 can be varied so that a circulating air speed is achieved which ensures a flow through the dry material.
  • the blow-out cross section of the blow-out profiles 19 is further adapted to the height of the dry material 13 in order 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 from the inside and not just dry from the outside. Intensive drying is targeted by 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.
  • the direction of flow of the hot air is reversed, so that the air flow calms down and is directed downwards to the dry material in a targeted and uniform manner.

Landscapes

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

Description

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zur Durchführung des Verfahrens gemäss dem ersten Teil der Ansprüche 1 bzw. 2.The invention relates to a method and a device for carrying out the method according to the first part of claims 1 and 2, respectively.

In Tunneltrockner der oben beschriebenen Art, deren Tunnel einige Meter breit und einige Meter hoch sind, werden entsprechend grosse Wagen in Längsrichtung gefördert, auf denen das Trockengut etagenweise abgesetzt ist. Die zur Austragung der Feuchtigkeit 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 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 further hot air devices are provided over the length of the dryer tunnel, or in which the air is wholly or partially 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/s, wobei sich die Luft infolge ihrer Erwärmung vornehmlich im oberen Querschnitt des Tunnels entlang bewegt, so dass das sich im unteren Querschnitt und in mittleren Abschnitten des Tunnels befindliche Trockengut nur sehr langsam trocknet.The air velocity 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 / s, 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 Dried 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 Feuchtigkeit über dem Tunnelquerschnitt zu erzielen und das Trockengut mit Trockenluft zu beaufschlagen. Ein derartiger Tunneltrockner ist aus der DE-A-1 927 839 bekannt. Die Trockenkammer dieses Tunneltrockners ist durch eine waagerechte Trennwand in einen unteren Trockenraum und einen oberen Mischraum unterteilt. Im unteren Trockenraum sind in Längsrichtung verfahrbare Absetzwagen untergebracht, die die zu trocknenden Formlinge aufnehmen, während in dem oberen Mischraum in regelmässigen Abständen Ventilatoren angeordnet sind, denen je eine Saugöffnung zum Ansaugen eines Trockenmediums und eine in der Trennwand angeordnete Saugöffnung zum Ansaugen des Umwälzmediums aus der Trockenkammer zugeordnet sind. Die Zufuhr des im Mischraum erwärmten Umwälzmediums in den unteren Teil der Trockenkammer erfolgt durch seitliche Klappen. Da bei einer derartigen kontinuierlichen Belüftung des Trockengutes das Wasser an der Oberfläche des Trockengutes rascher verdunstet als dieses durch die Kapillaren des Trockengutes nachgefördert werden kann, beginnt das Trockengut an der Oberfläche rascher auszutrocknen, so dass es an der Oberfläche schneller schwindet als im Inneren. Hierdurch können am Trockengut Schäden wie Risse, Sprünge usw. entstehen.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 capacity and thus to achieve a uniformity of temperatures and moisture across the tunnel cross section and to dry the dry material with dry air act upon. Such a tunnel dryer is known from DE-A-1 927 839. The drying chamber of this tunnel dryer is divided into a lower drying room and an upper mixing room by a horizontal partition. In the lower drying room, longitudinally movable settling carriages are accommodated, which receive the moldings to be dried, while in the upper mixing room, fans are arranged at regular intervals, each of which has a suction opening for sucking in a drying medium and a suction opening arranged in the partition for sucking in the circulating medium Drying chamber are assigned. The circulation medium heated in the mixing room is fed into the lower part of the drying chamber through side flaps. Since with such continuous aeration of the dry material the water on the surface of the dry material evaporates faster than this can be replenished by the capillaries of the dry material, the dry material begins to dry out more quickly, so that it shrinks on the surface faster 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 ausgebildet sind. Ein derartiger Tunneltrockner gemäss dem Oberbegriff des Patentanspruchs 1 ist aus der DE-C-416 312 bekannt. Dieser Tunneltrockner hat den Nachteil, dass die Trockenluft nicht aus dem oberen Bereich des Trockners angesaugt wird, wo sich die warme, relativ frische Trockenluft aufhält, sondern aus der Tiefe, und zwar quer zur Hauptströmungsrichtung der Trockenluft. Zwar sind bei diesem Tunneltrockner die oben beschriebenen Nachteile der dauernden Belüftung verringert, jedoch wird auch hier das Trockengut vornehmlich an den Aussenflächen umspült, so dass immer noch ein beträchtlicher Feuchtigkeitsunterschied zwischen dem Inneren und dem Äusseren des Trockengutes besteht, was zur Rissbildung führen kann.To avoid this disadvantage, tunnel dryers have been developed in which the circulation fans are designed to be movable. Such a tunnel dryer according to the preamble of claim 1 is known from DE-C-416 312. The disadvantage of this tunnel dryer is that the dry air is not drawn in from the upper area of the dryer, where the warm, relatively fresh dry air is located, but from the depth, transverse to the main flow direction of the dry air. Although the disadvantages of permanent ventilation described above are reduced in this tunnel dryer, the dry material is also washed around primarily on the outer surfaces, so that there is still a considerable difference in moisture between the inside and the outside of the dry material, which can lead to the formation of cracks.

Es sind ferner Tunneltrockner mit flachem Tunnel bekannt geworden, bei welchen nur eine niedrige Lage von Trockengut, etwa 0,2 bis 0,5 m, 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 anblasen.There have also been known tunnel dryers with a flat tunnel, in which only a low layer of dry material, about 0.2 to 0.5 m, is dried in wide tunnels according to the countercurrent principle and the circulation fans are arranged fixedly or movably above the dry material, and that Blow dry goods mainly on the outer surfaces.

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 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 leads to large differences in 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 entwikkelt, 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, in order 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 dry material and have a streamlined 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 downwards 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, ein Verfahren und eine Vorrichtung zur Belüftung von Trockengut gemäss den Gattungsbegriffen zu schaffen, bei welchen die Trocknung durch eine verbesserte Belüftung intensiviert wird und die Ziegelrohlinge gleichmässig getrocknet werden.The invention is therefore based on the object of providing a method and a device for ventilating dry material according to the generic terms, in which drying is intensified by improved ventilation and the brick blanks are dried uniformly.

Diese Aufgabe wird erfindungsgemäss durch die im kennzeichnenden Teil der Ansprüche 1 bzw. 2 angegebenen Merkmale gelöst. Vorteilhafte Ausgestaltungen der Vorrichtung ergeben sich aus den abhängigen Ansprüchen.This object is achieved according to the invention by the features specified in the characterizing part of claims 1 and 2. Advantageous embodiments of the device result from the dependent claims.

Gemäss der Erfindung sind bei dem flachen Tunneltrockner der über dem Trocknerwagen und dem darauf meist nur einlagig geschichteten Trokkengut 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 case of the flat tunnel dryer, the large free cross-section available above the dryer and the mostly dry layered dry goods on top of it, through which the dry air moves slowly from the exit side or blowing device to the entry side or suction device, has transverse air circulation housings which are arranged 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 forwards and backwards a few meters in the dryer, so that the dry goods are homogeneously loaded through the cavities. The air guiding 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 Trokkengutes 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 Trockengut 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 goods at controllable intervals, drying is effected evenly and gently in the dry goods, so that the dry goods dry 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 the side of the housing opposite the side where the dry hot air flows, so that the moisture gradient can be controlled in accordance with the requirements of the dry material can be done easily. A suitable drying interval can be formed by the advantageous profiling of the circulating housing and air guide bodies and by their ability to be moved 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 inventive device 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. This suction pipe 8 is connected to a suction device, not shown, which ensures that the air 20 is sucked out of the tunnel dryer 1 as moist exhaust air in the direction of the arrow 9.

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 bricks have a percentage of holes that can vary from 15 to 60%, depending on the type of brick. The direction of the holes lies 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.The housing 18 and blow-out profiles 19 are designed as hollow bodies into which the circulation 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.

Die Ausbildung der Ausblasprofile 19 kann dabei so variiert werden, dass eine Umwälzluftgeschwindigkeit erzielt wird, die eine Durchströmung des Trockengutes gewährleistet. Der Ausblasquerschnitt der Ausblasprofile 19 wird ferner an die Höhe des Trockengutes 13 angepasst, um das Trockengut 13 über die gesamte Fläche anzublasen.The configuration of the blow-out profiles 19 can be varied so that a circulating air speed is achieved which ensures a flow through the dry material. The blow-out cross section of the blow-out profiles 19 is further adapted to the height of the dry material 13 in order 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 etzielt.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 from the inside and not just dry from the outside. Intensive drying is targeted by 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.

Figure imgb0001
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 FIG. 1, the direction of flow of the hot air is reversed, so that the air flow calms down and is directed downwards to the dry material in a targeted and uniform manner.
Figure imgb0001

Claims (6)

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.
2. Apparatus for carrying out the method according to claim 1, comprising a tunnel dryer (1) having blow-in means (4, 5) for dry hot air as drying air disposed at the drive out side and draw- off means (7, 8) for humid exhaust air disposed on the drive-in side, and at least one air circulation fan (14) which has a housing (18) that may be moved in the free tunnel cross-section in the longitudinal direction of the tunnel dryer and that has parts which on both sides project downward to the level of the bottom of the material to be dried and contain blow-out orifices which lead the drying air to the material bo be dried (13), characterised in that the movable housing (18) with the fan (14) is arranged transversely in the tunnel dryer (1) and above the material to be dried (13) and, together with its downwardly projecting housing parts, fills up the free tunnel cross-section.
3. Apparatus according to claim 2, characterised in that the draw-in orifice of the air circulation fan (14) is disposed on that side of the housing (18), which is opposite to the side, which is blown against by the dry hot air.
4. Apparatus according to claim 2 or 3, characterised in that several housings provided with air circulation fans (14) are coupled with each other and have a common motion drive.
5. Apparatus according to any of claims 2 to 4, characterised in that the air circulation fans (14) with the housings (18) are mounted on slidable carriages (15) or the like.
6. Apparatus according to claim 2, characterised in that an additional internal heating is disposed in the housing (18).
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 EP0089408A2 (en) 1983-09-28
EP0089408A3 EP0089408A3 (en) 1985-03-06
EP0089408B1 true EP0089408B1 (en) 1987-10-07

Family

ID=6159074

Family Applications (1)

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

Country Status (3)

Country Link
EP (1) EP0089408B1 (en)
DE (2) DE3210652A1 (en)
ES (1) ES8400192A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3817972A1 (en) * 1988-05-27 1989-11-30 Erlus Baustoffwerke Method and device for drying newly moulded perforated bricks
DE4412353A1 (en) * 1994-04-11 1995-10-12 Keller Gmbh Countercurrent tunnel dryer for ceramic mouldings
DE102007062851A1 (en) 2007-11-27 2009-05-28 Robert Thomas Metall- Und Elektrowerke Gmbh & Co. Kg Dryers for perforated ceramic moldings

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3840264A1 (en) * 1988-05-27 1990-05-31 Erlus Baustoffwerke METHOD AND DEVICE FOR DRYING PLANT BLanks
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
ATE162298T1 (en) * 1994-04-11 1998-01-15 Keller Gmbh MOLDING SUPPORT FOR CERAMIC MOLDINGS TO BE DRYED, SUCH AS PERFORMED BRICKS
DE4412352C2 (en) * 1994-04-11 1998-04-30 Keller Gmbh Tunnel dryer for drying ceramic moldings
DE19527415A1 (en) * 1995-07-27 1997-01-30 Wagner Max Novokeram Method and device for drying ceramic moldings
DE29721763U1 (en) * 1997-12-10 1999-04-08 Novokeram Max Wagner GmbH, 86381 Krumbach Drying device for hollow ceramic moldings
DE102008013012B4 (en) * 2008-03-07 2010-08-12 Hans Lingl Anlagenbau Und Verfahrenstechnik Gmbh & Co. Kg Tunnel dryers for drying moldings, with air inlets spaced transversely from one another
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
CN102954673B (en) * 2011-08-31 2015-06-24 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
CN115143746B (en) * 2022-07-25 2023-05-12 广东技术师范大学 Stacked type hot drying and dehumidifying device for high-power module production

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
DE2251617C3 (en) * 1972-10-20 1975-05-07 Keller Ofenbau Gmbh, 4533 Laggenbeck Dryers for ceramic products, in particular bricks
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
DE2549696A1 (en) * 1975-11-06 1977-05-12 Thater Kg Nozzle type ventilator layout for ceramic blank drying - has axial blower fans and discharge nozzles directed into interior of housing containing layered drying racks
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 (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3817972A1 (en) * 1988-05-27 1989-11-30 Erlus Baustoffwerke Method and device for drying newly moulded perforated bricks
DE4412353A1 (en) * 1994-04-11 1995-10-12 Keller Gmbh Countercurrent tunnel dryer for ceramic mouldings
DE102007062851A1 (en) 2007-11-27 2009-05-28 Robert Thomas Metall- Und Elektrowerke Gmbh & Co. Kg Dryers for perforated ceramic moldings
EP2065664A2 (en) 2007-11-27 2009-06-03 Robert Thomas Metall- und Elektrowerke GmbH & Co. KG Dryer for perforated ceramic moulded blanks

Also Published As

Publication number Publication date
ES518165A0 (en) 1983-10-16
EP0089408A3 (en) 1985-03-06
DE3210652C2 (en) 1993-03-11
DE3210652A1 (en) 1983-10-06
EP0089408A2 (en) 1983-09-28
DE3277450D1 (en) 1987-11-12
ES8400192A1 (en) 1983-10-16

Similar Documents

Publication Publication Date Title
EP0089408B1 (en) Method and apparatus for ventilating the material to be dried in a tunnel dryer
DE4324488C2 (en) Process and hot air dryer for drying coated surfaces
DE102016125060B4 (en) Device for tempering objects
EP0024475B1 (en) Process and apparatus for controlling the ventilation of an object to be dryed in a drying tunnel
DE3321673C2 (en) Method and device for drying ceramic moldings
DE3049162A1 (en) Ceramic item drying equipment - has hollow walls with fans and air holes on inside
DE3941134C2 (en)
DE19527415A1 (en) Method and device for drying ceramic moldings
DE4002643C2 (en)
DE102013000754A1 (en) Device for tempering objects
DE4412352C2 (en) Tunnel dryer for drying ceramic moldings
DE19719183C1 (en) Multistage ceramic ware drying equipment
EP0867675A2 (en) Tunnel for drying layers of vertically-through-flowed bricks
DE2320600C3 (en)
DE2418358A1 (en) Tunnel for first shortened drying of ceramic tiles - replacing longitudinal airflow by transverse flow in a succession of zones
DE19727937C2 (en) Tunnel dryer system for drying bricks, especially perforated bricks
EP0877220A2 (en) Apparatus and process for drying shaped ceramic bodies
DE2251617C3 (en) Dryers for ceramic products, in particular bricks
DE19533667A1 (en) Tunnel drying kiln for ceramic mouldings
DE2252976A1 (en) DRYING TUNNEL FOR DRYING BLANKS MADE OF CERAMIC MATERIAL
EP0174642A2 (en) Dryer, in particular for ceramic objects
AT407441B (en) Apparatus for drying and/or firing ceramic material, in particular perforated bricks
DE1629011C (en) Dryer for ceramic moldings
DE1142794B (en) Tunnel dryer for long pasta
DE2549696A1 (en) Nozzle type ventilator layout for ceramic blank drying - has axial blower fans and discharge nozzles directed into interior of housing containing layered drying racks

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR IT

ITCL It: translation for ep claims filed

Representative=s name: ING. FISCHETTI WEBER

EL Fr: translation of claims filed
17P Request for examination filed

Effective date: 19840223

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): DE FR IT

ITF It: translation for a ep patent filed

Owner name: STUDIO INGG. FISCHETTI & WEBER

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: FUCHS & CO. GESELLSCHAFT M.B.H.

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR IT

REF Corresponds to:

Ref document number: 3277450

Country of ref document: DE

Date of ref document: 19871112

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
ITTA It: last paid annual fee
ITPR It: changes in ownership of a european patent

Owner name: CESSIONE;VOGEL & NOOT INDUSTRIE ANLAGENBAU GMBH

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19961016

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19970121

Year of fee payment: 15

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19971130

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980801

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST