EP0046994A1 - Roller hearth furnace - Google Patents

Roller hearth furnace Download PDF

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Publication number
EP0046994A1
EP0046994A1 EP81106714A EP81106714A EP0046994A1 EP 0046994 A1 EP0046994 A1 EP 0046994A1 EP 81106714 A EP81106714 A EP 81106714A EP 81106714 A EP81106714 A EP 81106714A EP 0046994 A1 EP0046994 A1 EP 0046994A1
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EP
European Patent Office
Prior art keywords
cooling zone
zone
furnace
articles
cooling
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
Application number
EP81106714A
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German (de)
French (fr)
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EP0046994B1 (en
Inventor
Gottfried Dr. Cremer
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.)
BUCHTAL GMBH KERAMISCHE BETRIEBE
Original Assignee
Buchtal Keramische Betriebe GmbH
Buchtal GmbH
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Publication of EP0046994A1 publication Critical patent/EP0046994A1/en
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Classifications

    • 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
    • F27B9/12—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity with special arrangements for preheating or cooling the charge
    • 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
    • F27B9/24—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 being carried by a conveyor
    • F27B9/2407—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 being carried by a conveyor the conveyor being constituted by rollers (roller hearth furnace)
    • 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
    • F27D7/00—Forming, maintaining, or circulating atmospheres in heating chambers
    • F27D7/06—Forming or maintaining special atmospheres or vacuum within heating chambers
    • 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
    • F27B9/12—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity with special arrangements for preheating or cooling the charge
    • F27B2009/124—Cooling
    • 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
    • F27D2009/007—Cooling of charges therein
    • F27D2009/0072—Cooling of charges therein the cooling medium being a gas
    • 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
    • F27D2009/007—Cooling of charges therein
    • F27D2009/0081—Cooling of charges therein the cooling medium being a fluid (other than a gas in direct or indirect contact with the charge)
    • 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
    • F27D5/00—Supports, screens, or the like for the charge within the furnace
    • F27D5/0062—Shields for the charge

Definitions

  • the atmosphere in the cooling zone remains at rest and there can be no retroactive effect in the firing zone.
  • a reducing gas, salt vapors or similar media influencing the surface of the fired material in the desired manner are introduced into this static atmosphere, for example, via lances 8 which can be controlled in terms of their direction and throughput. Since the introduction into a still atmosphere takes place, the dosing is simple and uncomplicated and can be carried out in such a way that there are no effects on: the neighboring area of the firing zone.
  • fixed shielding as can be seen in FIG. 4, is provided, and also a shield in the form of a type of Venetian blind, as indicated at 5.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Tunnel Furnaces (AREA)

Abstract

The cooling zone (K.Z.) pertains to a furnace, preferably a roller furnace, comprising a preheating zone (V.Z.), a firing zone (B.Z.) and a cooling zone (K.Z.). The articles to be fired, preferably ceramic slabs or plates, are conveyed through that furnace, in one layer without refractory material support. The zone (K.Z.) is indirectly cooled in order to prevent, in this zone (K.Z.) and its neighbourings, the atmosphere from acting on the articles to be treated, thereby avoiding a re-oxidation of said articles (B), and it is possible to act on their outer surface in a simple manner by means of a heat-carrying flow, preferably a heat-conveying fluid. The cooling zone comprises members which are adjustable in direction and flow rate for injecting materials acting on the surface of the articles. The indirect cooling is achieved preferably by means of coils (3) arranged above the articles to be subjected to the firing (B); their radiating surfaces may be masked in an adjustable fashion (in 5) and are arranged transversely with respect to the direction of movement of the articles. The masking elements (5) may be pivoted to swing like the blades of a blind or be made of sliding plates, movable towards each other. The coils (3) may be connected with other parts of the furnace, or with heat recovery installations.

Description

Die Erfindung betrifft die Ausbildung der Kühlzone für einen aus Vorheiz-, Brenn-und Kühlzone bestehenden Brennofen, vorzugsweise Rollenofen, durch den das Brenngut, vorzugsweise keramische Fliesen oder Platten, ohne es stützende Brennhilfsmittel aus feuerfestem Material einschichtig hindurchgeführt wird.The invention relates to the design of the cooling zone for a furnace consisting of a preheating, firing and cooling zone, preferably a roller furnace, through which the firing material, preferably ceramic tiles, is passed in one layer without supporting firing aids made of refractory material.

Bei das Brenngut einschichtig und ohne Brennhilfsmittel aus feuerfestem Material brennenden Rollenöfen durchläuft das Brenngut die Vorheiz-, Brenn- und Kühlzone auf einem Rollenteppich, dessen aus einem Spezialstahl oder keramischen feuerfesten Material bestehende Rollen von außerhalb des Ofens angetrieben werden. Der besondere Vorteil dieser öfen besteht darin, daß der Einsatz von Wagen und feuerfesten Brennhilfsmitteln entfällt. Diese Transport- und Stützmittel stellen eine erhebliche Masse dar, die vom Ofen aufgeheizt werden muß und in der Kühlzone wieder zur Abkühlung gebracht wird. Es wird also ein erheblicher Teil der dem Ofen zum Brand des Brenngutes zugeführten Energie ungenutzt verschwendet.In the case of roller kilns burning in a single layer and without firing aids made of refractory material, the kiln passes through the preheating, burning and cooling zone on a roller carpet, the rollers of which are made of special steel or ceramic refractory material are driven from outside the furnace. The particular advantage of these ovens is that there is no need for trolleys or fireproof kiln furniture. These means of transport and support represent a considerable amount Mass that must be heated by the oven and brought to cool in the cooling zone. A considerable part of the energy supplied to the furnace for the firing of the material to be burned is thus wasted.

Mit solchen einschichtig und ohne Einsatz von Transport-und Brennhilfsmitteln betriebenen öfen wird nicht nur eine wesentliche Energieeinsparung erreicht, sondern es läßt sich auch der Brennvorgang schneller und gleichmäßiger durchführen. Man gelangt zu erheblich verkürzten Produktionszyklen.Such furnaces operated in one layer and without the use of transport and firing aids not only achieve substantial energy savings, but the firing process can also be carried out faster and more uniformly. This leads to significantly shortened production cycles.

In der Kühlzone solcher öfen wird im allgemeinen mit sogenannter Sturzkühlung gearbeitet, d.h. es werden geeignete Mengen von Luft in die Kühlzone eingeführt und auf das Brenngut zur Einwirkung gebracht. Dabei kommt es unvermeidbar, auch wenn die Brennzone gegen die Kühlzone durch eine Schürze abgeschlossen ist, zu Rückwirkungen aus der Kühlzone in die Brennzone und, wenn diese reduzierend gefahren wird, zu einer Reoxidierung des Brenngutes in der Kühlzone und wenigstens in dem der Kühlzone benachbarten Bereich der Brennzone. Will man eine solche Reoxidierung des Brenngutes in der Kühlzone und ein Zurückwirken der Reoxidierung in die der Kühlzone benachbarten Bereiche der Brennzone verhindern, so kann dies nach der DE-OS 28 24 367 beispielsweise dadurch erfolgen, daß man die der Reduktion in der Kühlzone dienenden Mittel in den Ofen intermittierend unter hohem Druck und in solchen Anteilen und Zeitabständen eingibt, daß der nach jeder durch Eingabe eines Anteils erzielten Teilreduktion verbleibende Oberschuß des Reduktionsmittelanteils so gering ist, daß er in der zwischen aufeinanderfolgenden Eingaben liegenden Pausen ohne zusätzliche Luftzuführung durch die neutrale Ofenatmosphäre abgebrannt wird.In the cooling zone of such ovens, so-called tumble cooling is generally used, i.e. Appropriate amounts of air are introduced into the cooling zone and brought into effect on the firing material. This inevitably results, even if the firing zone is closed off from the cooling zone by an apron, to repercussions from the cooling zone into the firing zone and, if this is operated in a reducing manner, to reoxidation of the combustible material in the cooling zone and at least in the area adjacent to the cooling zone the burning zone. If you want to prevent such reoxidation of the firing material in the cooling zone and a repercussion of the reoxidation in the areas of the firing zone adjacent to the cooling zone, this can be done according to DE-OS 28 24 367, for example, by reducing the agents in the cooling zone enters the furnace intermittently under high pressure and in such proportions and intervals that the excess of the reducing agent portion remaining after each partial reduction achieved by inputting a portion is so small that it burns down in the pauses between successive inputs without additional air supply through the neutral furnace atmosphere becomes.

Es ist erkennbar, daß zur Durchführung eines solchen Verfahrens ein außerordentlich kompliziertes Steuersystem erforderlich ist.It can be seen that to carry out such a procedure an extremely complicated tax system is required.

Aufgabe der Erfindung ist es, durch Anwendung einfachster Mittel die Beeinflussung des Brenngutes in der Kühlzone und in dem der Kühlzone benachbarten Bereich durch die Atmosphäre der Kühlzone und damit eine entsprechende Reoxidierung des Brenngutes zu verhindern und eine einfache Möglichkeit zur Beeinflussung der Oberfläche des Brenngutes zu schaffen.The object of the invention is to use the simplest means to prevent the combustion goods in the cooling zone and in the area adjacent to the cooling zone from being affected by the atmosphere of the cooling zone and thus a corresponding reoxidation of the combustion goods and to provide a simple way of influencing the surface of the combustion goods .

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Kühlzone mittels eines strömenden Wärmeträgers,vorzugsweise eines flüssigen wärmeträgers, indirekt gekühlt ist und in ihrer Richtung und ihrem Durchsatz einstellbare Einführungsorgane für die Oberfläche des Brenngutes beeinflussende Medien aufweist.This object is achieved according to the invention in that the cooling zone is indirectly cooled by means of a flowing heat transfer medium, preferably a liquid heat transfer medium, and has introduction elements for the surface of the combustion material which influence the direction and throughput of the inlet elements.

Bei Einsatz eines flüssigen Wärmeträgers, beispielsweise Wasser, das durch Rohrschlangen oder -register in der Kühlzone über dem Brenngut geführt wird, ergibt sich ebenfalls eine schroffe Abkühlung des Brenngutes in der Kühlzone, ohne daß jedoch die Gefahr der Beeinflussung der Atmosphäre durch eingeführte Kühlluft besteht. Gleichzeitig wird damit aber in der Kühlzone eine praktisch ruhende Atmosphäre geschaffen, mit der es nunmehr möglich ist, Luft oder ein sonstiges, die Oberfläche des Brenngutes beeinflussendes Medium hinsichtlich Menge und Richtung gesteuert in die Kühlzone einzuführen. So kann man beispielsweise zur Beeinflussung der Glasur ein entsprechendes Gas oder einen entsprechenden Dampf einführen.When using a liquid heat transfer medium, for example water, which is led through coils or registers in the cooling zone above the material to be fired, there is also a sudden cooling of the fuel in the cooling zone, but without the risk of the atmosphere being influenced by the cooling air introduced. At the same time, however, a practically calm atmosphere is created in the cooling zone, with which it is now possible to introduce air or another medium that influences the surface of the material to be controlled into the cooling zone in terms of quantity and direction. For example, an appropriate gas or vapor can be introduced to influence the glaze.

Um zu vermeiden, daß von den den Wärmeträger führenden Rohrschlangen oder -registern abplatzender Zunder o. dgl. auf das Brenngut fällt, lassen sich diese Rohrschlangen oder -register gegen das Brenngut abschirmen, wobei in weiterer Ausbildung der Erfindung die Strahlungsflächen der den Wärmeträger führenden Rohrschlangen oder -register gegen das Brenngut regel-. bar abgeschirmt sind, so daß nicht nur das Brenngut geschützt wird, sondern der Kühlvorgang auch in beliebiger und optimaler Weise gesteuert werden kann.In order to avoid that from the pipe coils or registers leading to the heat transfer flaking scale or the like falls on the firing material, these pipe coils or register can be shielded against the firing material, the radiation surfaces of the heat carrier leading in a further embodiment of the invention regulate the coils or registers against the firing material. bar are shielded, so that not only the firing material is protected, but the cooling process can also be controlled in any and optimal way.

Vorzugsweise sind die Rohrschlangen oder -register quer zur Fahrtrichtung des Brenngutes durch den Brennofen angeordnet, weil dann die Einspeisung und Ableitung des Wärmeträgers besonders einfach ist. Auch die Anordnung und Bedienung der Abschirmung 14st bei einer solchen Anordnung der Rohrschlangen oder -register wesentlich einfacher.The coils or coils are preferably arranged transversely to the direction of travel of the firing material through the furnace, because then the feeding and removal of the heat transfer medium is particularly simple. The arrangement and operation of the shield 14st is much simpler with such an arrangement of the coils or coils.

Die regelbare Abschirmung besteht vorzugsweise aus jalousieartig angeordneten, verdrehbaren, paddelartigen Elementen. Diese Elemente decken im geschlossenen Zustand der Abschirmung die Kühlschlangen oder -register praktisch vollständig ab und lassen durch leichtes Verdrehen Schlitze frei, durch die die um die Kühlschlangen oder -register vorhandene stark gekühlte Atmosphäre nach unten sturzartig auf das Brenngut zur Einwirkung gelangen kann.The adjustable shielding preferably consists of rotatable, paddle-like elements arranged in the manner of blinds. In the closed state of the shielding, these elements cover the cooling coils or registers practically completely and, by turning them slightly, leave slots free through which the strongly cooled atmosphere present around the cooling coils or registers can suddenly fall down on the firing material.

Anstelle der jalousieartigen Vorhänge kann man auch Schlitzplatten verwenden, die sich in gewünschter Weise wechselseitig so übereinanderschieben lassen, daß mehr oder weniger große öffnungen für den Durchtritt gekühlter Atmosphäre nach unten auf das Brenngut zur Verfügung stehen. Durch die Verstellbarkeit der Abschirmung ist es auch möglich, den Kühlprozeß in der Kühlzone in beliebiger Weise zu beeinflussen.Instead of the blind-like curtains, slotted plates can also be used, which can be pushed over each other in the desired manner so that more or less large openings are available for the passage of the cooled atmosphere down onto the firing material. Due to the adjustability of the shielding, it is also possible to influence the cooling process in the cooling zone in any way.

Ein wesentlicher Vorteil der Erfindung besteht darin, daß die den Wärmeträger führenden Rohrschlangen oder -register an die Wärme wiedergewinnende oder wiedernutzbarmachende Anlagen oder Ofenteile angeschlossen werden können.A major advantage of the invention is that the pipe coils or registers carrying the heat transfer medium can be connected to the heat-recovering or reusable systems or furnace parts.

Die Zeichnung zeigt in

  • Fig. 1 eine schematische Draufsicht auf einen Brennofen;
  • Fig. 2 einen Schnitt längs der Linie II-II der Fig. 1;
  • Fig. 3 einen Teillängsschnitt.durch die Kühlzone.
The drawing shows in
  • Figure 1 is a schematic plan view of a kiln.
  • Fig. 2 is a section along the line II-II of Fig. 1;
  • 3 shows a partial longitudinal section through the cooling zone.

Bei einem in Richtung des Pfeiles A mit dem zu brennenden Gut, insbesondere keramische Platten beschickten Ofen sind eine Vorheizzone V.Z., eine Brennzone B.Z. die in Richtung der Pfeile B mittels Brenner beheizt wird, und eine Kühlzone K.Z. vorgesehen, aus der das.fertige gebrannte und gekühlte Brenngut austritt. Das Brenngut B wird mittels Rollen durch den Ofen transportiert, von denen eine bei 1 in Fig. 2 und mehrere, ebenfalls mit 1 bezeichnet in Fig. 3 erkennbar sind. Solche Rollen bilden vom Ofeneingang bis zum Ofenausgang einen Rollenteppich und sind von außen her angetrieben, so daß sie das auf ihnen lagernde Brenngut B durch den Ofen hindurchfördern. In der Kühlzone K.Z. erfolgte die Kühlung bis jetzt durch Kühlluft, die mittels über und unter dem Rollenteppich angebrachten Gebläse in die Kühlzone eingeführt wurde. Trotz eines bei 2 in Fig. 1 angedeuteten Schurzes zwischen Brennzone und Kühlzone ist es nicht möglich, eine Rückwirkung dieser Kühlluft auf die Brennzone und damit eine Beeinflussung der dort herrschenden Atmosphäre zu verhindern. Gemäß einem Merkmal der Erfindung erfolgt die Kühlung des Brenngutes B in der Kühlzone K.Z. nicht durch Einblasen von Kühlluft, sondern durch indirekte Kühlung mittels eines strömenden Wärmeträgers, vorzugsweise eines flüssigen Wärmeträgers, wie Wasser, der durch die vorzugsweise quer zur Fahrtrichtung des Brenngutes verlegten Kühlschlangen oder -register 3 im oberen Teil der Kühlzone hindurchgeführt wird. Di.e Atmosphäre in der Kühlzone bleibt dabei in Ruhe und es kann nicht mehr zu einer Rückwirkung in die Brennzone kommen. In diese ruhende Atmosphäre werden z.B. über in ihrer Richtung und in ihrem Durchsatz steuerbare Lanzen 8 ein reduzierendes Gas, Salzdämpfe oder ähnliche, die Oberfläche des Brenngutes in der gewünschten Weise beeinflussende Medien eingeführt. Da die Einführung in eine ruhende Atmosphäre erfolgt, ist die Dosierung einfach und unkompliziert und so durchführbar, daß Rückwirkungen auf : den benachbarten Bereich der Brennzone nicht auftreten. Um ein Abfallen von sich allenfalls an den Kühlschlangen oder -registern 3 bildenden Zunder o. dgl. auf das Kühlgut zu verhindern, ist einmal eine feste Abschirmung, wie sie bei 4 erkennbar ist, vorgesehen und zum anderen auch eine Abschirmung in Form einer Art von Jalousie, wie sie bei 5 angedeutet ist. Diese Jalousie besteht aus paddelartigen, sich quer über die Kühlzone erstreckenden Elementen, die so eingestellt werden können, daß sie die Lücken zwischen den festen Abschirmungen 4 praktisch schließen. Mit dieser Maßnahme ist nicht nur ein zusätzlicher Schutz des Brenngutes auf den Rollen 1 gewährleistet, sondern es ist auch möglich, den Kühlvorgang zu dosieren. Selbstverständlich kann anstelle der in Fig. 3 wiedergegebenen paddelartigen Elemente auch eine Anordnung vorgesehen werden, die sich aus quer über die Kühlzone oder in Längsrichtung der Kühlzone erstreckenden Schlitzplatten zusammensetzt, deren Schlitze gegenseitig mehr oder weniger zur Deckung gebracht werden können, so daß mehr oder weniger große öffnungen entstehen, durch die von den Kühlschlangen oder -registern her die kühlende EinWirkung auf das auf den Rollen 1 geförderte Brenngut erfolgt.In a furnace charged with the material to be burned, in particular ceramic plates, in the direction of arrow A, a preheating zone VZ, a firing zone BZ which is heated in the direction of arrows B by a burner, and a cooling zone KZ are provided, from which the finished and fired cooled fired material emerges. The fired material B is transported through the furnace by means of rollers, one of which can be seen at 1 in FIG. 2 and several, also denoted by 1 in FIG. 3. Such rollers form a roller carpet from the furnace inlet to the furnace outlet and are driven from the outside, so that they convey the firing material B stored on them through the furnace. In the cooling zone KZ, cooling has so far been carried out by cooling air, which was introduced into the cooling zone by means of fans attached above and below the roller carpet. In spite of a skirt between the combustion zone and the cooling zone indicated at 2 in FIG. 1, it is not possible to prevent this cooling air from reacting to the combustion zone and thus from influencing the atmosphere there. According to a feature of the invention, the combustion of the material B to be burned in the cooling zone KZ is not carried out by blowing in cooling air, but by indirect cooling by means of a flowing heat transfer medium, preferably a liquid heat transfer medium, such as water, through the cooling coils, which are preferably laid transversely to the direction of travel of the combustion material -register 3 is passed in the upper part of the cooling zone. The atmosphere in the cooling zone remains at rest and there can be no retroactive effect in the firing zone. A reducing gas, salt vapors or similar media influencing the surface of the fired material in the desired manner are introduced into this static atmosphere, for example, via lances 8 which can be controlled in terms of their direction and throughput. Since the introduction into a still atmosphere takes place, the dosing is simple and uncomplicated and can be carried out in such a way that there are no effects on: the neighboring area of the firing zone. In order to prevent any scaling or the like that may form on the cooling coils or registers 3 from falling onto the refrigerated goods, fixed shielding, as can be seen in FIG. 4, is provided, and also a shield in the form of a type of Venetian blind, as indicated at 5. This blind consists of paddle-like elements extending across the cooling zone, which can be adjusted so that they practically close the gaps between the fixed shields 4. This measure not only ensures additional protection of the firing material on the rollers 1, but it is also possible to meter the cooling process. Of course, instead of the paddle-like elements shown in FIG. 3, an arrangement can be provided which is composed of slotted plates extending transversely across the cooling zone or in the longitudinal direction of the cooling zone, the slits of which can be more or less coincident with one another, so that more or less Large openings are created through which the cooling coils or coils have a cooling effect on the fuel to be conveyed on the rollers 1.

Unter dem aus den Rollen 1 bestehenden Rollenteppich befindet sich eine feuerfeste Isolierung 6.Fireproof insulation 6 is located beneath the roller carpet consisting of rollers 1.

Die Kühlschlangen oder -register 3 können in nicht dargestellter Weise an Anlagen oder Ofenteile angeschlossen sein, beispielsweise zur Vorheizzone geführt sein, so daß ein Teil der Wärmeenergie des Wärmeträgers dort zum Vorheizen des Brenngutes dienen kann. Man kann die von dem Wärmeträger aufgenommenen Wärmemengen auch in anderer Weise, z.B. zum Trocknen weiterverwenden.The cooling coils or registers 3 can be connected to systems or furnace parts in a manner not shown, for example guided to the preheating zone, so that part of the thermal energy of the heat transfer medium can be used there to preheat the combustion material. The amounts of heat absorbed by the heat transfer medium can also be used in other ways, e.g. continue to use for drying.

Claims (6)

1. Kühlzone für einen aus Vorheiz-, Brenn- und Kühlzone bestehenden Brennofen, vorzugsweise Rollenofen, durch den das Brenngut, vorzugsweise keramische Fliesen oder Platten, ohne es stützende Brennhilfsmittel aus feuerfestem Material einschichtig hindurchgeführt wird, dadurch gekennzeichnet , daß die Kühlzone mittels eines strömenden Wärmeträgers, vorzugsweise eines flüssigen Wärmeträgers, indirekt gekühlt ist, und in ihrer Richtung und ihrem Durchsatz einstellbare Einführungsorgane für die Oberfläche des Brenngutes beeinflussende Medien aufweist.1. Cooling zone for a preheating, firing and cooling zone furnace, preferably roller furnace, through which the material to be burned, preferably ceramic tiles, is passed without a supporting firing aid made of refractory material, characterized in that the cooling zone by means of a flowing Heat transfer medium, preferably a liquid heat transfer medium, is indirectly cooled, and has insertion elements which can be adjusted in their direction and throughput for media influencing the surface of the combustion material. 2. Kühlzone nach Anspruch 1, dadurch gekennzeichnet , daß in der Kühlzone über dem Brenngut den Wärmeträger führende Rohrschlangen oder -register angeordnet sind, deren Strahlungsflächen gegen das Brenngut regelbar abgeschirmt sind.2. Cooling zone according to claim 1, characterized in that the heat transfer pipe coils or registers are arranged in the cooling zone above the kiln, the radiation surfaces are shielded controllably against the kiln. 3. Kühlzone nach Anspruch 2, dadurch gekennzeichnet , daß die Rohrschlangen oder -register quer zur Fahrtrichtung des Brenngutes angeordnet sind.3. Cooling zone according to claim 2, characterized in that the coils or registers are arranged transversely to the direction of travel of the material to be burned. 4. Kühlzone nach Anspruch 2 oder 3, dadurch gekennzeichnet , daß die Abschirmung aus jalousieartig angeordneten, verdrehbaren paddelartigen Elemente besteht.4. Cooling zone according to claim 2 or 3, characterized in that the shield consists of rotatable paddle-like elements arranged in the manner of blinds. 5. Kühlzone nach Anspruch 2 oder 3, dadurch gekennzeichnet , daß die Abschirmung aus gegeneinander verschiebbaren Schlitzplatten besteht.5. Cooling zone according to claim 2 or 3, characterized in that the shield consists of mutually displaceable slot plates. 6. Kühlzone nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet , daß die den Wärmeträger führenden Rohrschlangen oder -register an die Wärme wiedergewinnende oder wiedernutzbarmachende Anlagen oder Ofenteile angeschlossen sind.6. Cooling zone according to one or more of the preceding claims, characterized in that the pipe coils or registers carrying the heat transfer medium are connected to the heat-recovering or reusable systems or furnace parts.
EP81106714A 1980-08-28 1981-08-28 Roller hearth furnace Expired EP0046994B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3032452 1980-08-28
DE19803032452 DE3032452A1 (en) 1980-08-28 1980-08-28 COOLING ZONE FOR A FURNACE, PREFERABLY ROLLER

Publications (2)

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EP0046994A1 true EP0046994A1 (en) 1982-03-10
EP0046994B1 EP0046994B1 (en) 1984-12-19

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EP81106714A Expired EP0046994B1 (en) 1980-08-28 1981-08-28 Roller hearth furnace

Country Status (5)

Country Link
EP (1) EP0046994B1 (en)
JP (1) JPS57501793A (en)
DE (1) DE3032452A1 (en)
WO (1) WO1982000876A1 (en)
ZA (1) ZA815987B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115218674A (en) * 2022-07-11 2022-10-21 中国人民解放军国防科技大学 Pyrolysis device suitable for preparation of fiber reinforced ceramic matrix composite

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Publication number Priority date Publication date Assignee Title
DE3514085A1 (en) * 1985-04-18 1986-10-23 Buchtal Gmbh, 8472 Schwarzenfeld ROLLER OVEN FOR BURNING A FLAT OR PLATE-SHAPED CERAMIC COMBUSTION
DE3514086A1 (en) * 1985-04-18 1986-10-23 Buchtal Gmbh, 8472 Schwarzenfeld ROLLER OVEN FOR BURNING A PLATE-SHAPED CERAMIC COMBUSTION
DE3514084A1 (en) * 1985-04-18 1986-10-23 Buchtal Gmbh, 8472 Schwarzenfeld ROLLER OVEN FOR BURNING A FLAT OR PLATE-SHAPED CERAMIC COMBUSTION
CN102735069B (en) * 2012-06-27 2014-03-19 佛山市新明珠卫浴有限公司 Hot-blast air combustion-supporting intelligent control system for roller bed kiln furnace
CN109668428B (en) * 2018-12-29 2024-06-14 湖南金炉科技股份有限公司 Heat treatment kiln

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GB954674A (en) * 1959-11-12 1964-04-08 Aton Planungs & Baugesellschaft Fuer Die Keramische Industrie Mbh Tunnel kilns
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DE976094C (en) * 1948-12-28 1963-02-21 Gottfried Dr Cremer Tunnel kiln for firing ceramic and related products
DE975458C (en) * 1951-04-10 1961-11-30 Gottfried Dr Cremer Tunnel furnace with at least partially indirect cooling of the cooling zone
US2968894A (en) * 1955-03-04 1961-01-24 Selas Corp Of America Annealing lehr
DE1177062B (en) * 1957-02-26 1964-08-27 Gottfried Cremer Dr Tunnel kiln for firing ceramic and related products
GB954674A (en) * 1959-11-12 1964-04-08 Aton Planungs & Baugesellschaft Fuer Die Keramische Industrie Mbh Tunnel kilns
DE1277288B (en) * 1960-12-31 1968-09-12 Ofu Ofenbau Union Ges Mit Besc Heat treatment furnace with a cooling zone adjoining a heating zone through which hot gases flow
DE1245042B (en) * 1962-04-13 1967-07-20 Fetok Gmbh Waste heat recovery system for tunnel ovens
DE1583447A1 (en) * 1967-12-04 1970-10-29 Fetok Gmbh Process for the production of stoneware pipes
DE2708783A1 (en) * 1977-03-01 1978-09-07 Iob Ind Ofen Bau Gmbh & Co Kg ARRANGEMENT FOR REGULATING THE COOLING INTENSITY IN THE COOLING ZONE OF CONTINUOUSLY OPERATING GLUE FURNACES FOR THE HEAT TREATMENT OF WORKPIECES, IN PARTICULAR CAST IRON PIPES
DE2824367A1 (en) * 1978-06-01 1979-12-06 Keramische Ind Bedarfs Gmbh Pa Ceramics reducing atmosphere furnace control system - delivers reducing agents intermittently at high pressure into furnace

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115218674A (en) * 2022-07-11 2022-10-21 中国人民解放军国防科技大学 Pyrolysis device suitable for preparation of fiber reinforced ceramic matrix composite
CN115218674B (en) * 2022-07-11 2024-04-16 中国人民解放军国防科技大学 High-temperature cracking device suitable for preparing fiber reinforced ceramic matrix composite

Also Published As

Publication number Publication date
JPS57501793A (en) 1982-10-07
EP0046994B1 (en) 1984-12-19
WO1982000876A1 (en) 1982-03-18
DE3032452A1 (en) 1982-04-01
DE3032452C2 (en) 1987-04-30
ZA815987B (en) 1983-01-26

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