EP0314820B1 - Device for the under-wagon cooling of furnace wagons in tunnel furnaces - Google Patents

Device for the under-wagon cooling of furnace wagons in tunnel furnaces Download PDF

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Publication number
EP0314820B1
EP0314820B1 EP87116103A EP87116103A EP0314820B1 EP 0314820 B1 EP0314820 B1 EP 0314820B1 EP 87116103 A EP87116103 A EP 87116103A EP 87116103 A EP87116103 A EP 87116103A EP 0314820 B1 EP0314820 B1 EP 0314820B1
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EP
European Patent Office
Prior art keywords
cooling
kiln
channel
cooling air
trucks
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Revoked
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EP87116103A
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German (de)
French (fr)
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EP0314820A1 (en
Inventor
Claudio Eustacchio
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VOGEL & NOOT INDUSTRIEANLAGENBAU GESELLSCHAFT M.B.
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Vogel and Noot Industrieanlagenbau GmbH
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Application filed by Vogel and Noot Industrieanlagenbau GmbH filed Critical Vogel and Noot Industrieanlagenbau GmbH
Priority to AT87116103T priority Critical patent/ATE74422T1/en
Priority to EP87116103A priority patent/EP0314820B1/en
Priority to DE8787116103T priority patent/DE3778025D1/en
Priority to ES198787116103T priority patent/ES2031106T3/en
Priority to US07/257,670 priority patent/US4990086A/en
Publication of EP0314820A1 publication Critical patent/EP0314820A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
    • F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace
    • F27B9/26—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace on or in trucks, sleds, or containers
    • F27B9/262—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace on or in trucks, sleds, or containers on or in trucks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D9/00—Cooling of furnaces or of charges therein

Definitions

  • the invention relates to a device for cooling the undercarriage of kiln cars in tunnel kilns, with an undercarriage channel through which the cooling medium flows, which is formed by the foundation and the side walls of the tunnel kiln and by the bottom of the kiln car and which is at least largely sealed off from the combustion channel formed above the kiln car.
  • a closed wagon train is usually moved through the tunnel kiln, the steel structures of the kiln cars being protected against the combustion channel by a structure made of refractory and insulating materials.
  • the tunnel kilns of modern plants are built with channel widths of up to 10 meters, and the sealing of the kiln cars requires greater precision than is possible with simple means. This leads to leaks between the combustion channel above the kiln car and the undercarriage channel. As a result, hot gases from the combustion zone enter the cooling duct (undercarriage duct) and endanger the steel structure there, but especially the kiln car wheels and bearings. On the other hand, uncontrolled cooling air from the cooling duct under the kiln car enters the combustion channel through the kiln car, which leads to damage to the fired material.
  • the invention is therefore based on the object to ensure the cooling of the steel structure of the kiln cars and their wheels and bearings in a structurally simple manner and at the same time to avoid that the combustible material can be damaged by uncontrolled cooling air entering the combustion duct and to rule out that even with large pressure differences A gas exchange takes place between the combustion channel and the cooling channel.
  • This object is essentially achieved in that at least one closed cooling air duct running in the longitudinal direction of the tunnel furnace is arranged in the undercarriage duct, through which cooling air can flow, which fills the undercarriage duct as far as possible and which is only slightly spaced from the underside of the kiln car.
  • Cooling air is guided through this airtight cooling air duct and keeps the sheathing of the cooling air duct, which is preferably made of sheet metal, approximately at ambient temperature. Due to the proximity of this cooled sheet metal jacket to the steel parts of the kiln cars, the heat of these steel parts.
  • the kiln car train 4 which consists of individual kiln cars 8, is moved on rails 6.
  • Each kiln car 8 comprises a steel structure 10, on which the kiln car wheels 12 are mounted via bearings, not shown.
  • the steel structure 10 carries a fireclay structure 14 on which the stack of bricks 16 are deposited.
  • the undercarriage duct 22 to be cooled is defined between the side walls 18 of the tunnel furnace 2, the foundation 20 of the tunnel furnace 2 and the underside of the steel structure 10 of the furnace cars 8.
  • the combustion duct 26 is defined between the fireclay structure 14 of the furnace carriage 8, the side walls 18 and the furnace combustion duct ceiling 24 of the tunnel furnace.
  • cooling air ducts 28, 30, 32 running in the longitudinal direction of the tunnel furnace 2, each of which has a rectangular cross section, rest on or rest on the foundation 20 or the side walls 18 of the tunnel furnace 2 and only from the underside of the steel structure 10 marginally, d. H. at a distance of less than 2 mm.
  • the cooling air channels 28 to 32 are preferably made of sheet metal.
  • a space is defined between the cooling air channels 28, 30 and 30, 32, in which the kiln car wheels 12 can run.
  • the rails 6 are arranged on the underside of this space.
  • sealing tongues 34 are welded to the underside of the steel structure 10 of the kiln car 8, these sealing tongues preferably being provided at the front and rear ends of each kiln car 8 .
  • the distance between the lateral edges of these sealing tongues 34 from the side surfaces of the closed cooling air ducts 28, 30 and 32 is also very small and is preferably less than 2 mm.
  • cooling air is passed through the cooling air channels 28, 30, 32, as a result of which the sheet metal shells of the cooling air channels are cooled, which in turn results in cooling of the steel structure 10 of the kiln car 8 and the kiln car wheels 12 including their bearings.
  • the cooling air ducts 28, 30, 32 practically completely fill the undercarriage duct 22 and, moreover, the sealing tongues 34 provide sealing of the spaces between the cooling air ducts, a longitudinal flow inside the undercarriage duct 22 outside the area of the cooling air ducts 28 to 32 can practically not occur.
  • the cooling air is completely inside the closed cooling air ducts 28 to 32 is included, an exchange between cooling air and hot air from the combustion channel 26 is not possible, so that special sealing measures are unnecessary.
  • a simple, additional seal between the undercarriage channel 22 and the combustion channel 26 results from lateral, continuous sealing strips 36 projecting from the steel structure 10 of the kiln cars 8 into the side walls 18.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Tunnel Furnaces (AREA)
  • Furnace Details (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)

Abstract

A device for under-wagon cooling of furnace wagons (8) in tunnel furnaces (2) comprises a number of closed cooling air ducts (28, 30, 32) which fill the under-wagon channel as far as possible and are only at a small distance from the furnace wagon undersides. The cooling air ducts, which are flowed through by cooling air, ensure sufficient cooling of the furnace wagons, an exchange of cooling air from the under-wagon channel and of heating air from the combustion channel (26) being simply avoided at the same time so that no additional sealing measures have to be taken. <IMAGE>

Description

Die Erfindung betrifft eine Vorrichtung zur Unterwagenkühlung von Ofenwagen in Tunnelöfen, mit einem vom Kühlmedium durchströmten Unterwagenkanal, der durch das Fundament und die Seitenwände des Tunnelofens und durch die Ofenwagenunterseiten gebildet ist und der gegenüber dem oberhalb der Ofenwagen gebildeten Brennkanal zumindest weitestgehend abgedichtet ist.The invention relates to a device for cooling the undercarriage of kiln cars in tunnel kilns, with an undercarriage channel through which the cooling medium flows, which is formed by the foundation and the side walls of the tunnel kiln and by the bottom of the kiln car and which is at least largely sealed off from the combustion channel formed above the kiln car.

Bei Tunnelöfen wird üblicherweise ein geschlossener Wagenzug durch den Tunnelofen bewegt, wobei die Stahlkonstruktionen der Ofenwagen gegen den Brennkanal hin durch einen Aufbau aus feuerfesten und isolierenden Materialien geschützt wird.In the case of tunnel kilns, a closed wagon train is usually moved through the tunnel kiln, the steel structures of the kiln cars being protected against the combustion channel by a structure made of refractory and insulating materials.

Da im Brennkanal aufgrund der unterschiedlichen Temperaturen und Zugverhältnisse große Druckunterschiede herrschen, muß der unterhalb der Ofenwagen angeordnete Unterwagenkanal zum Schutz der Stahlteile abgedichtet werden.Since there are large pressure differences in the combustion duct due to the different temperatures and draft conditions, the undercarriage duct arranged below the kiln car must be used be sealed to protect the steel parts.

Zur Abdichtung des sich unter den Ofenwagen befindlichen Unterwagenkanals gegenüber dem Brennkanal werden beim Stand der Technik seitlich an den Ofenwagen Sandrinnen geführt, in welche die seitlich an den Stahlkonstruktionen der Ofenwagen befestigten, durchgehenden Blechplatten als Dichtschürzen eintauchen. An den aneinanderstoßenden Wagenenden werden labyrinthartige Dichtungen mit feuerfesten Dichtschnüren angebracht.In order to seal the undercarriage duct located under the kiln car against the combustion channel, in the prior art sand channels are guided on the side of the kiln car, into which the continuous sheet metal plates attached to the steel structures of the kiln car are immersed as sealing aprons. Labyrinth-like seals with fire-resistant sealing cords are attached to the car ends that meet.

Diese bekannten Abdichtungen sind jedoch ungenügend. Da durch den Unterwagenkanal Kühlluft zum Kühlen der Stahlkonstruktion einschließlich Ofenwagenrädern mit Lagern bewegt werden muß, herrschen im Unterwagenkanal andere Zug- und Druckverhältnisse als im oberhalb der Ofenwagen befindlichen Brennkanal.However, these known seals are insufficient. Since cooling air has to be moved through the undercarriage duct to cool the steel structure, including kiln car wheels with bearings, there are different tensile and pressure conditions in the undercarriage duct than in the combustion duct located above the kiln car.

Die Tunnelöfen moderner Werke werden mit Kanalbreiten bis zu 10 Metern gebaut, und die Abdichtungen der Ofenwagen erfordern höhere Präzision, als dies mit einfachen Mitteln möglich ist. Dadurch kommt es zu undichten Stellen zwischen dem Brennkanal oberhalb der Ofenwagen und dem Unterwagenkanal. In der Folge gelangen heiße Gase aus der Brennzone in den Kühlkanal (Unterwagenkanal) und gefährden dort die Stahlkonstruktion, insbesondere aber die Ofenwagenräder und Lager. Andererseits gelangt unkontrolliert Kühlluft aus dem Kühlkanal unter den Ofenwagen in den Brennkanal über den Ofenwagen, was zu einer Schädigung des Brenngutes führt.The tunnel kilns of modern plants are built with channel widths of up to 10 meters, and the sealing of the kiln cars requires greater precision than is possible with simple means. This leads to leaks between the combustion channel above the kiln car and the undercarriage channel. As a result, hot gases from the combustion zone enter the cooling duct (undercarriage duct) and endanger the steel structure there, but especially the kiln car wheels and bearings. On the other hand, uncontrolled cooling air from the cooling duct under the kiln car enters the combustion channel through the kiln car, which leads to damage to the fired material.

Aus der europäischen Patentanmeldung 0 227 927 ist es bekannt, den Unterwagenkanal in einzelne kurze Kammern zu teilen, durch die von außen Kühlrohre geführt werden, welche die Luft in diesen Kammern kühlen sollen. Diese Kühlrohre befinden sich in einem Abstand von ca. 0,5 m von der zu kühlenden Stahlkonstruktion der Tunnelofenwagen entfernt unterhalb der Ofenwagen. Da sich die zu kühlende Ofenwagenkonstruktion an der höchsten Stelle der Kühlkammern befindet, ist dort auch der Raum und damit die Luft am heißesten.From European patent application 0 227 927 it is known to divide the undercarriage duct into individual short chambers through which cooling pipes are led from the outside, which are intended to cool the air in these chambers. These cooling tubes are located at a distance of approx. 0.5 m from the to Cooling steel structure of the tunnel kiln car removed below the kiln car. Since the kiln car construction to be cooled is located at the highest point of the cooling chambers, the room and therefore the air is also the hottest.

Es erscheint daher wenig sinnvoll, im Abstand von ca. 0,5 m unterhalb der Ofenwagenunterseiten die Luft zu kühlen, da die heiße Luft infolge des geringeren spezifischen Gewichtes nach oben steigt und es nicht in ausreichendem Maße zu der gewünschten natürlichen Umwälzung kommen kann. Es müßten künstliche Umwälzeinrichtungen eingebaut werden, was bei bis zu 100 Ofenwagen pro Tunnelofen und 2 Kammern pro Ofenwagen unwirtschaftlich wird.It therefore makes little sense to cool the air at a distance of approx. 0.5 m below the underside of the kiln car, since the hot air rises due to the lower specific weight and the desired natural circulation cannot occur to a sufficient extent. Artificial circulation devices would have to be installed, which becomes uneconomical with up to 100 kiln cars per tunnel kiln and 2 chambers per kiln car.

Der Erfindung liegt daher die Aufgabe zugrunde, in konstruktiv einfacher Weise die Kühlung der Stahlkonstruktion der Ofenwagen sowie deren Räder und Lager sicherzustellen und gleichzeitig zu vermeiden, daß das Brenngut durch unkontrolliert in den Brennkanal gelangende Kühlluft geschädigt werden kann sowie auszuschließen, daß selbst bei großen Druckunterschieden zwischen dem Brennkanal und Kühlkanal ein Gasaustausch stattfindet.The invention is therefore based on the object to ensure the cooling of the steel structure of the kiln cars and their wheels and bearings in a structurally simple manner and at the same time to avoid that the combustible material can be damaged by uncontrolled cooling air entering the combustion duct and to rule out that even with large pressure differences A gas exchange takes place between the combustion channel and the cooling channel.

Diese Aufgabe wird erfindungsgemäß im wesentlichen dadurch gelöst, daß im Unterwagenkanal mindestens ein in Längsrichtung des Tunnelofens verlaufender, geschlossener Kühlluftkanal angeordnet ist, der von Kühlluft durchströmbar ist, der den Unterwagenkanal weitestmöglich ausfüllt und der von den Ofenwagenunterseiten nur geringfügig beabstandet ist.This object is essentially achieved in that at least one closed cooling air duct running in the longitudinal direction of the tunnel furnace is arranged in the undercarriage duct, through which cooling air can flow, which fills the undercarriage duct as far as possible and which is only slightly spaced from the underside of the kiln car.

Durch diesen luftdichten Kühlluftkanal wird Kühlluft geführt, welche die vorzugsweise aus Metallblech bestehende Ummantelung des Kühlluftkanals in etwa auf Umgebungstemperatur hält. Durch die Nähe dieser gekühlten Blechummantelung an den Stahlteilen der Ofenwagen wird die Wärme dieser Stahlteile abgeführt.Cooling air is guided through this airtight cooling air duct and keeps the sheathing of the cooling air duct, which is preferably made of sheet metal, approximately at ambient temperature. Due to the proximity of this cooled sheet metal jacket to the steel parts of the kiln cars, the heat of these steel parts.

Aufgrund des sehr geringen Abstands des geschlossenen Kühlluftkanals von der Unterseite der Stahlkonstruktion der Ofenwagen von weniger als 5 mm, vorzugsweise weniger als 2 mm, kann es innerhalb des Unterwagenkanals außerhalb des Bereichs des Kühlluftkanals praktisch zu keinem Fließen von Gasströmen kommen. Hierdurch ist eine Längsströmung von Luft zwischen den Stahlkonstruktionen des Ofenwagens und der Blechummantelung des Kühlluftkanals praktisch ausgeschlossen. Gleichzeitig ist ausgeschlossen, daß heiße Luft vom Brennkanal in den Raum unterhalb der Ofenwagen oder Kaltluft vom Unterwagenkanal in den Brennkanal gelangen kann. Im Falle der vorliegenden Erfindung entfällt somit die Notwendigkeit, die Tunnelofenwagen luftdicht zwischen Brennkanal und Unterwagenkanal abzudichten, was einen entscheidenden Vorteil der Erfindung darstellt.Due to the very small distance of the closed cooling air duct from the underside of the steel structure of the kiln cars of less than 5 mm, preferably less than 2 mm, practically no flow of gas flows can occur inside the undercarriage duct outside the area of the cooling air duct. In this way, a longitudinal flow of air between the steel structures of the kiln car and the sheet metal jacket of the cooling air duct is practically excluded. At the same time, it is impossible for hot air from the combustion duct to get into the space below the kiln car or cold air from the undercarriage duct into the combustion duct. In the case of the present invention, there is therefore no need to seal the tunnel kiln cars airtight between the combustion duct and the undercarriage duct, which is a decisive advantage of the invention.

In der Praxis werden mehrere parallele Kühlluftkanäle vorzusehen sein, von denen jeweils einer zwischen den Rädern der Ofenwagen bzw. zwischen den Rädern der Ofenwagen und der diesen benachbarten Seitenwand des Tunnelofens angeordnet ist. In der Regel sind, falls die Räder der Ofenwagen nicht ganz am seitlichen Ende der Ofenwagen angeordnet sind, drei Kühlluftkanäle vorzusehen, und zwar ein mittlerer Kühlluftkanal, welcher sich zwischen den linken und rechten Rädern erstreckt, ein linker Kühlluftkanal, welcher sich zwischen den linken Rädern und der linken Tunnelofen-Seitenwand und ein rechter Kühlluftkanal, welcher sich zwischen den rechten Rädern und der rechten Tunnelofen-Seitenwand erstreckt.In practice, several parallel cooling air ducts will have to be provided, one of which is arranged in each case between the wheels of the kiln cars or between the wheels of the kiln cars and the side wall of the tunnel oven adjacent to these. As a rule, if the wheels of the kiln cars are not arranged entirely at the side end of the kiln cars, three cooling air channels must be provided, namely a central cooling air channel that extends between the left and right wheels, and a left cooling air channel that extends between the left wheels and the left tunnel furnace side wall and a right cooling air duct which extends between the right wheels and the right tunnel furnace side wall.

Zwischen den parallel verlaufenden Kühlluftkanälen befinden sich somit Räume, in denen die Räder der Ofenwagen laufen können. Um eine in Längsrichtung des Tunnelofens verlaufende Luftströmung durch diese Räume hindurch zu verhindern, ist in bevorzugter Weiterbildung der Erfindung vorgesehen, daß an den Ofenwagen vertikale, quer zur Transportrichtung verlaufende Dichtzungen angeordnet sind, die sich in den zwischen benachbarten Kühlluftkanälen definierten Raum erstrecken und von den Kühlluftkanälen bzw. den zur Führung der Ofenwagen vorgesehenen Schienen nur geringfügig beabstandet sind, d.h. einen Abstand kleiner als 5 mm, vorzugsweise kleiner als 2 mm, haben.There are spaces between the parallel cooling air ducts in which the wheels of the kiln cars can run. In order to prevent air flow through these rooms in the longitudinal direction of the tunnel furnace, In a preferred development of the invention, vertical sealing tongues extending transversely to the transport direction are arranged on the kiln car, which extend into the space defined between adjacent cooling air ducts and are only slightly spaced from the cooling air ducts or the rails provided for guiding the kiln car, ie have a distance of less than 5 mm, preferably less than 2 mm.

Weitere vorteilhafte Merkmale der Erfindung ergeben sich aus den übrigen Unteransprüchen im Zusammenhang mit der nachfolgenden Beschreibung, in der ein Ausführungsbeispiel der Erfindung anhand der Zeichnung näher beschrieben ist. In der Zeichnung zeigen in halbschematischer Darstellung:

Fig. 1
einen Längsschnitt durch einen mit einer erfindungsgemäßen Vorrichtung zur Unterwagenkühlung ausgerüsteten Tunnelofen, und>
Fig. 2
einen Querschnitt durch den Tunnelofen gemäß Fig. 1.
Further advantageous features of the invention result from the remaining subclaims in connection with the following description, in which an embodiment of the invention is described in more detail with reference to the drawing. The drawing shows in a semi-schematic representation:
Fig. 1
a longitudinal section through a tunnel oven equipped with a device for cooling undercarriage according to the invention, and>
Fig. 2
2 shows a cross section through the tunnel furnace according to FIG. 1.

Durch den in den Fig. 1 und 2 skizzierten Tunnelofen 2 wird auf Schienen 6 der Ofenwagenzug 4 bewegt, welcher aus einzelnen Ofenwagen 8 besteht. Jeder Ofenwagen 8 umfaßt eine Stahlkonstruktion 10 ,an der über nicht näher dargestellte Lager die Ofenwagenräder 12 gelagert sind. Die Stahlkonstruktion 10 trägt einen Schamotteaufbau 14, auf dem Ziegelstapel 16 abgesetzt sind. Zwischen den Seitenwänden 18 des Tunnelofens 2, dem Fundament 20 des Tunnelofens 2 und der Unterseite der Stahlkonstruktion 10 der Ofenwagen 8 ist der zu kühlende Unterwagenkanal 22 definiert. Oberhalb des Unterwagenkanals 22 ist zwischen dem Schamotteaufbau 14 der Ofenwagen 8, den Seitenwänden 18 und der Ofenbrennkanaldecke 24 des Tunnelofens der Brennkanal 26 definiert.Through the tunnel furnace 2 outlined in FIGS. 1 and 2, the kiln car train 4, which consists of individual kiln cars 8, is moved on rails 6. Each kiln car 8 comprises a steel structure 10, on which the kiln car wheels 12 are mounted via bearings, not shown. The steel structure 10 carries a fireclay structure 14 on which the stack of bricks 16 are deposited. The undercarriage duct 22 to be cooled is defined between the side walls 18 of the tunnel furnace 2, the foundation 20 of the tunnel furnace 2 and the underside of the steel structure 10 of the furnace cars 8. Above the undercarriage duct 22, the combustion duct 26 is defined between the fireclay structure 14 of the furnace carriage 8, the side walls 18 and the furnace combustion duct ceiling 24 of the tunnel furnace.

Innerhalb des Unterwagenkanals 22 sind drei in Längsrichtung des Tunnelofens 2 verlaufende Kühlluftkanäle 28, 30, 32 vorgesehen, welche jeweils rechteckigen Querschnitt haben, am Fundament 20 bzw. den Seitenwänden 18 des Tunnelofens 2 auf- bzw. anliegen und von der Unterseite der Stahlkonstruktion 10 nur geringfügig, d. h. unter einem Abstand von weniger als 2 mm, beabstandet sind. Die Kühlluftkanäle 28 bis 32 bestehen vorzugsweise aus Metallblech. Zwischen den Kühlluftkanälen 28, 30 und 30, 32 ist jeweils ein Raum definiert, in welchem die Ofenwagenräder 12 laufen können. An der Unterseite dieses Raums sind die Schienen 6 angeordnet.Provided within the undercarriage duct 22 are three cooling air ducts 28, 30, 32 running in the longitudinal direction of the tunnel furnace 2, each of which has a rectangular cross section, rest on or rest on the foundation 20 or the side walls 18 of the tunnel furnace 2 and only from the underside of the steel structure 10 marginally, d. H. at a distance of less than 2 mm. The cooling air channels 28 to 32 are preferably made of sheet metal. A space is defined between the cooling air channels 28, 30 and 30, 32, in which the kiln car wheels 12 can run. The rails 6 are arranged on the underside of this space.

Zur Abdichtung des vorgenannten Raumes zwischen den Blech-Kühlluftkanälen 28, 30 und 30, 32 sind vertikal verlaufende Dichtzungen 34 an der Unterseite der Stahlkonstruktion 10 der Ofenwagen 8 angeschweißt, wobei diese Dichtzungen vorzugsweise jeweils an den vorderen und hinteren Enden eines jeden Ofenwagens 8 vorgesehen sind. Der Abstand der seitlichen Ränder dieser Dichtzungen 34 von den Seitenflächen der geschlossenen Kühlluftkanäle 28, 30 bzw. 32 ist ebenfalls sehr gering bemessen und ist vorzugsweise kleiner als 2 mm.To seal the aforementioned space between the sheet metal cooling air ducts 28, 30 and 30, 32, vertically extending sealing tongues 34 are welded to the underside of the steel structure 10 of the kiln car 8, these sealing tongues preferably being provided at the front and rear ends of each kiln car 8 . The distance between the lateral edges of these sealing tongues 34 from the side surfaces of the closed cooling air ducts 28, 30 and 32 is also very small and is preferably less than 2 mm.

Während des Betriebes wird Kühlluft durch die Kühlluftkanäle 28, 30, 32 geleitet, wodurch die Blechmäntel der Kühlluftkanäle gekühlt werden, was wiederum eine Kühlung der Stahlkonstruktion 10 der Ofenwagen 8 bzw. der Ofenwagenräder 12 einschließlich deren Lager zur Folge hat. Nachdem die Kühlluftkanäle 28, 30, 32 den Unterwagenkanal 22 praktisch vollständig ausfüllen, und im übrigen die Dichtzungen 34 für eine Abdichtung der Räume zwischen den Kühlluftkanälen sorgen, kann eine Längsströmung innerhalb des Unterwagenkanals 22 außerhalb des Bereichs der Kühlluftkanäle 28 bis 32 praktisch nicht auftreten. Nachdem die Kühlluft vollständig innerhalb der geschlossenen Kühlluftkanäle 28 bis 32 eingeschlossen ist, ist ein Austausch zwischen Kühlluft und heißer Luft aus dem Brennkanal 26 nicht möglich, so daß sich spezielle Abdichtmaßnahmen erübrigen.During operation, cooling air is passed through the cooling air channels 28, 30, 32, as a result of which the sheet metal shells of the cooling air channels are cooled, which in turn results in cooling of the steel structure 10 of the kiln car 8 and the kiln car wheels 12 including their bearings. After the cooling air ducts 28, 30, 32 practically completely fill the undercarriage duct 22 and, moreover, the sealing tongues 34 provide sealing of the spaces between the cooling air ducts, a longitudinal flow inside the undercarriage duct 22 outside the area of the cooling air ducts 28 to 32 can practically not occur. After the cooling air is completely inside the closed cooling air ducts 28 to 32 is included, an exchange between cooling air and hot air from the combustion channel 26 is not possible, so that special sealing measures are unnecessary.

Eine einfache, zusätzliche Abdichtung zwischen dem Unterwagenkanal 22 und dem Brennkanal 26 ergibt sich durch seitliche, von der Stahlkonstruktion 10 der Ofenwagen 8 in die Seitenwände 18 ragende, durchgehende horizontale Dichtleisten 36.A simple, additional seal between the undercarriage channel 22 and the combustion channel 26 results from lateral, continuous sealing strips 36 projecting from the steel structure 10 of the kiln cars 8 into the side walls 18.

Claims (6)

  1. Device for the undertruck cooling of kiln trucks (8) in tunnel kilns (2), having an undertruck channel (22) through which the cooling medium flows and which is formed by the foundation (20) and the side walls (18) of the tunnel kiln (2) and by the undersides of the kiln trucks and which is sealed off, at least to the greatest extent, from the firing channel (26) formed above the kiln trucks (8), characterised in that at least one closed cooling-air channel (28, 30, 32) running in the longitudinal direction of the tunnel kiln (2) is arranged in the undertruck channel (22), through which cooling-air channel (28, 30, 32) cooling air can flow and which fills the undertruck channel (22) to the greatest possible extent and is only at a slight distance from the kiln-truck undersides.
  2. Device according to Claim 1, characterised in that a plurality of parallel cooling-air channels (28, 30, 32) are provided, of which in each case one is arranged between the wheels (12) of the kiln trucks (8) or between the wheels (12) of the kiln trucks (8) and the side wall (18), adjacent to these trucks (8), of the tunnel kiln (2).
  3. Device according to Claim 2, characterised in that vertical sealing tongues (34) running transversely to the transport direction are arranged on the kiln trucks (8), which sealing tongues (34) extend into the space defined between adjacent cooling-air channels (28, 30 and 30, 32 respectively) and are only at a slight distance from the cooling-air channels or the rails (6) provided for guiding the kiln trucks (8).
  4. Device according to Claim 3, characterised in that the sealing tongues (34) are provided at least at both ends of each kiln truck (8).
  5. Device according to one of the preceding claims, characterised in that the cooling-air channels (28, 30, 32) are made of sheet metal.
  6. Device according to one of the preceding claims, characterised in that the distance between the cooling channels (28, 30, 32) and the kiln-truck underside or the sealing tongues (34) is less than 5 mm, preferably less than 2 mm.
EP87116103A 1987-11-02 1987-11-02 Device for the under-wagon cooling of furnace wagons in tunnel furnaces Revoked EP0314820B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
AT87116103T ATE74422T1 (en) 1987-11-02 1987-11-02 DEVICE FOR UNDERCARRIAGE COOLING OF FURNACE CARS IN TUNNEL FURNACES.
EP87116103A EP0314820B1 (en) 1987-11-02 1987-11-02 Device for the under-wagon cooling of furnace wagons in tunnel furnaces
DE8787116103T DE3778025D1 (en) 1987-11-02 1987-11-02 DEVICE FOR UNDERCAR COOLING OF OVEN CARS IN TUNNEL OVENS.
ES198787116103T ES2031106T3 (en) 1987-11-02 1987-11-02 DEVICE FOR THE REFRIGERATION OF LOWER CHASSIS OF OVEN WAGONS IN OVENS-TUNNEL.
US07/257,670 US4990086A (en) 1987-11-02 1988-10-14 System for under-cart cooling of furnace carts in tunnel furnaces

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP87116103A EP0314820B1 (en) 1987-11-02 1987-11-02 Device for the under-wagon cooling of furnace wagons in tunnel furnaces

Publications (2)

Publication Number Publication Date
EP0314820A1 EP0314820A1 (en) 1989-05-10
EP0314820B1 true EP0314820B1 (en) 1992-04-01

Family

ID=8197413

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87116103A Revoked EP0314820B1 (en) 1987-11-02 1987-11-02 Device for the under-wagon cooling of furnace wagons in tunnel furnaces

Country Status (5)

Country Link
US (1) US4990086A (en)
EP (1) EP0314820B1 (en)
AT (1) ATE74422T1 (en)
DE (1) DE3778025D1 (en)
ES (1) ES2031106T3 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9103904U1 (en) * 1991-03-30 1992-07-30 Keller Gmbh, 4530 Ibbenbueren, De
IT1287623B1 (en) * 1996-02-22 1998-08-06 Sacmi Forni Spa COOLING ELEMENT, PARTICULARLY FOR TUNNEL OVENS
KR20010032704A (en) * 1997-12-02 2001-04-25 알프레드 엘. 미첼슨 Method for firing ceramic honeycomb bodies
ATE321013T1 (en) * 1997-12-02 2006-04-15 Corning Inc METHOD FOR FIRING CERAMIC HONEYCOMB BODY IN A TUNNEL FURNACE
DE69838183T3 (en) * 1997-12-22 2014-12-11 Corning Incorporated Tunnel kiln for firing ceramic honeycomb structural bodies
US6325963B1 (en) 1997-12-22 2001-12-04 Corning Incorporated Method for firing ceramic honeycomb bodies
ES2221243T3 (en) * 1998-02-12 2004-12-16 Keller H.C.W. Gmbh PROCEDURE FOR COOLING BELOW VAGONETS AND THERMAL USE WITHIN A CONTINUOUS OVEN AS WELL AS INSTALLATION OF CONTINUOUS OVEN FOR THE PERFORMANCE OF THE PROCEDURE.
US7950921B1 (en) * 2007-07-20 2011-05-31 Solution Dynamics, Llc Method and apparatus for cooling the underside of kiln cars
FR2928447B1 (en) 2008-03-10 2014-02-07 Imerys Tc TUNNEL OVEN
JP6274448B2 (en) * 2015-03-20 2018-02-07 株式会社タイエイジャパン Firing furnace and coating method
DE102018123269A1 (en) * 2018-09-21 2020-03-26 Eisenmann Se Transport trolley for transporting workpieces, treatment plant and method for treating workpieces

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Publication number Priority date Publication date Assignee Title
US1867318A (en) * 1930-02-26 1932-07-12 Walter A Hull Tunnel kiln
DE607099C (en) * 1933-07-15 1934-12-17 Siemens Schuckertwerke Akt Ges Electrically heated tunnel or channel furnace
FR1335903A (en) * 1962-10-11 1963-08-23 Bbc Brown Boveri & Cie System for regulating the temperature of the cooling medium passing through the cooling elements of the cooling zone of a heat treatment furnace
DE3021907A1 (en) * 1980-06-11 1981-12-17 Josef Meindl oHG, 8250 Dorfen Tunnel kiln, esp. for baking ceramic prods. - where positive air pressure in lower part of kiln precludes ingress of cold external air
FR2521704A1 (en) * 1982-02-12 1983-08-19 Hartmann Pere & Fils SEALING DEVICE FOR FOUR-TUNNEL, AND WAGONS AND FOUR-TUNNEL AGENCIES FOR OBTAINING THIS DEVICE
US4560350A (en) * 1984-03-29 1985-12-24 Resco Products, Inc. End block
FR2584805B1 (en) * 1985-07-12 1989-07-13 Elect Meca Et Const IMPROVEMENT IN DRYING AND COOKING PLANTS FOR CERAMIC PRODUCTS
DE3541015C1 (en) * 1985-11-19 1986-09-11 Hans Lingl Anlagenbau Und Verfahrenstechnik Gmbh & Co Kg, 7910 Neu-Ulm Method and device for cooling undercarriage of kiln cars in tunnel kilns
DE3604501C1 (en) * 1986-02-13 1993-01-14 Hans Lingl Anlagenbau Und Verfahrenstechnik Gmbh & Co Kg, 7910 Neu-Ulm Method and device for cooling undercarriage of kiln cars in a tunnel kiln
US4778384A (en) * 1985-11-19 1988-10-18 Lingl Jr Hans Multitrain tunnel kiln especially adapted for the underside cooling of kiln cars
DE3627050C1 (en) * 1986-08-09 1991-11-28 Lingl Anlagenbau Tunnel kiln for the reducing firing of facing bricks

Also Published As

Publication number Publication date
DE3778025D1 (en) 1992-05-07
US4990086A (en) 1991-02-05
EP0314820A1 (en) 1989-05-10
ATE74422T1 (en) 1992-04-15
ES2031106T3 (en) 1992-12-01

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