EP0314820A1 - 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
EP0314820A1
EP0314820A1 EP87116103A EP87116103A EP0314820A1 EP 0314820 A1 EP0314820 A1 EP 0314820A1 EP 87116103 A EP87116103 A EP 87116103A EP 87116103 A EP87116103 A EP 87116103A EP 0314820 A1 EP0314820 A1 EP 0314820A1
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EP
European Patent Office
Prior art keywords
cooling air
kiln
cooling
kiln car
duct
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.)
Granted
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EP87116103A
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German (de)
French (fr)
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EP0314820B1 (en
Inventor
Claudio Eustacchio
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Vogel & Noot Industrieanlagenbau Gesellschaft Mb
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Fuchs & Co GmbH
Fuchs & Co GmbH
Vogel and Noot Industrieanlagenbau GmbH
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Application filed by Fuchs & Co GmbH, Fuchs & Co GmbH, Vogel and Noot Industrieanlagenbau GmbH filed Critical Fuchs & Co GmbH
Priority to EP87116103A priority Critical patent/EP0314820B1/en
Priority to DE8787116103T priority patent/DE3778025D1/en
Priority to ES198787116103T priority patent/ES2031106T3/en
Priority to AT87116103T priority patent/ATE74422T1/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 on the steel parts of the kiln car, 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 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 or 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 channels 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)
  • Furnace Details (AREA)
  • Tunnel Furnaces (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 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 on the steel parts of the kiln car, the heat of these steel parts.

Aufgrund des sehr geringen Abstands des geschlossenen Kühl­luftkanals von der Stahlkonstruktion der Ofenwagen von 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 steel construction of the kiln car, preferably less than 2 mm, practically no 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.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 it is provided that 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.

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 shows a longitudinal section through a tunnel oven equipped with an inventive device for cooling undercarriage, and>
  • FIG. 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 Ofenwägen 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 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 Kühlluft­ kanäle 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 or 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 channels 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. Vorrichtung zur Unterwagenkühlung von Ofenwagen (8) in Tunnelofen (2), mit einem vom Kühlmedium durchströmten Unterwagenkanal (22), der durch das Fundament (20) und die Seitenwände (18) des Tunnelofens (2) und durch die Ofenwagenunterseiten gebildet ist und der gegenüber dem oberhalb der Ofenwagen (8) gebildeten Brennkanal (26) zumindest weitestgehend abgedichtet ist, dadurch gekennzeichnet, daß im Unterwagenkanal (22) mindestens ein in Längsrichtung des Tunnelofens (2) verlaufender, geschlossener Kühlluftkanal (28, 30, 32) angeordnet ist, der von Kühlluft durchströmbar ist, der den Unter­wagenkanal (22) weitestmöglich ausfüllt und der von den Ofenwagen-Unterseiten nur geringfügig beabstandet ist.1. Device for cooling undercarriage of kiln cars (8) in tunnel kiln (2), with an undercarriage channel (22) through which the cooling medium flows, which is formed by the foundation (20) and the side walls (18) of the tunnel kiln (2) and by the kiln car undersides and at least largely sealed off from the combustion duct (26) formed above the kiln car (8), characterized in that at least one closed cooling air duct (28, 30, 32) running in the longitudinal direction of the tunnel kiln (2) is arranged in the undercarriage duct (22) which can be flowed through by cooling air, which fills the undercarriage duct (22) as far as possible and which is only slightly spaced from the underside of the kiln car. 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß mehrere parallele Kühlluftkanäle (28, 30, 32) vorge­sehen sind, von denen jeweils einer zwischen den Rädern (12) der Ofenwagen (8) bzw. zwischen den Rädern (12) der Ofenwagen (8) und der diesen benachbarten Seitenwand (18) des Tunnelofens (2) angeordnet ist.2. Apparatus according to claim 1, characterized in that a plurality of parallel cooling air channels (28, 30, 32) are provided, one of which is between the wheels (12) of the kiln car (8) or between the wheels (12) of the kiln car ( 8) and the adjacent side wall (18) of the tunnel furnace (2) is arranged. 3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß an den Ofenwagen (8) vertikale, quer zur Transport­richtung verlaufende Dichtzungen (34) angeordnet sind, die sich in den zwischen benachbarten Kühlluftkanälen (28, 30 bzw. 30, 32) definierten Raum erstrecken und von den Kühlluftkanälen bzw. den zur Führung der Ofen­wagen (8) vorgesehenen Schienen (6) nur geringfügig beabstandet sind.3. Apparatus according to claim 2, characterized in that on the kiln car (8) vertical, transverse to the transport direction sealing tongues (34) are arranged which extend in the space between adjacent cooling air channels (28, 30 and 30, 32) defined and are only slightly spaced from the cooling air ducts or the rails (6) provided for guiding the kiln cars (8). 4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß die Dichtzungen (34) zumindest an beiden Enden eines jeden Ofenwagens (8) vorgesehen sind.4. The device according to claim 3, characterized in that the sealing tongues (34) are provided at least at both ends of each kiln car (8). 5. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Kühlluftkanäle (28, 30, 32) aus Metallblech bestehen.5. Device according to one of the preceding claims, characterized in that the cooling air channels (28, 30, 32) consist of sheet metal. 6. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Abstand der Kühlkanäle (28, 30, 32) von der Ofenwagenunterseite bzw. von den Dichtzungen (34) kleiner als 5 mm, vorzugsweise kleiner als 2 mm ist.6. Device according to one of the preceding claims, characterized in that the distance between the cooling channels (28, 30, 32) from the bottom of the kiln car or from 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
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.
AT87116103T ATE74422T1 (en) 1987-11-02 1987-11-02 DEVICE FOR UNDERCARRIAGE COOLING OF FURNACE CARS IN TUNNEL FURNACES.
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 true EP0314820A1 (en) 1989-05-10
EP0314820B1 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)

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DE9103904U1 (en) * 1991-03-30 1992-07-30 Keller Gmbh, 4530 Ibbenbueren, De

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IT1287623B1 (en) * 1996-02-22 1998-08-06 Sacmi Forni Spa COOLING ELEMENT, PARTICULARLY FOR TUNNEL OVENS
CN1174210C (en) * 1997-12-02 2004-11-03 康宁股份有限公司 Tunnel Kiln for firing ceramic honeycomb bodies
CN1093521C (en) * 1997-12-02 2002-10-30 康宁股份有限公司 Method for firing ceramic honeycomb bodies
WO1999032844A1 (en) * 1997-12-22 1999-07-01 Corning Incorporated Method for firing ceramic honeycomb bodies and a tunnel kiln used therefor
US6325963B1 (en) 1997-12-22 2001-12-04 Corning Incorporated Method for firing ceramic honeycomb bodies
ATE267993T1 (en) * 1998-02-12 2004-06-15 Keller H C W Gmbh METHOD FOR UNDERCARRIAGE COOLING AND HEAT USE IN A TUNNEL OVEN AND TUNNEL OVEN SYSTEM FOR IMPLEMENTING IT
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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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

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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
EP0086693A1 (en) * 1982-02-12 1983-08-24 ENTREPRISE HARTMANN PERE &amp; FILS Sealing device for a tunnel oven, wagon and tunnel oven for this sealing device
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

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* 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

Also Published As

Publication number Publication date
ATE74422T1 (en) 1992-04-15
ES2031106T3 (en) 1992-12-01
EP0314820B1 (en) 1992-04-01
US4990086A (en) 1991-02-05
DE3778025D1 (en) 1992-05-07

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