EP1050731B1 - Firing furnace - Google Patents

Firing furnace Download PDF

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Publication number
EP1050731B1
EP1050731B1 EP20000108918 EP00108918A EP1050731B1 EP 1050731 B1 EP1050731 B1 EP 1050731B1 EP 20000108918 EP20000108918 EP 20000108918 EP 00108918 A EP00108918 A EP 00108918A EP 1050731 B1 EP1050731 B1 EP 1050731B1
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EP
European Patent Office
Prior art keywords
furnace
chamber
firing
articles
furnace chamber
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.)
Revoked
Application number
EP20000108918
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German (de)
French (fr)
Other versions
EP1050731A1 (en
Inventor
Martin Wernet
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Eisenmann Anlagenbau GmbH and Co KG
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Eisenmann Anlagenbau GmbH and Co KG
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Classifications

    • 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
    • F27D7/04—Circulating atmospheres by mechanical means
    • 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
    • F27B9/06—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated
    • F27B9/10—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated heated by hot air or gas
    • 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
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B9/3005—Details, accessories, or equipment peculiar to furnaces of these types arrangements for circulating gases
    • F27B9/3011—Details, accessories, or equipment peculiar to furnaces of these types arrangements for circulating gases arrangements for circulating gases transversally
    • 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
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B2009/305—Particular conformation of the furnace
    • F27B2009/3055—Non-uniform section through the length of the furnace
    • 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
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B9/36—Arrangements of heating devices
    • F27B2009/3638—Heaters located above and under the track
    • 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
    • F27B9/02—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity of multiple-track type; of multiple-chamber type; Combinations of furnaces
    • F27B9/029—Multicellular type furnaces constructed with add-on modules
    • 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
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B9/40—Arrangements of controlling or monitoring devices
    • 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
    • F27D7/04—Circulating atmospheres by mechanical means
    • F27D2007/045—Fans
    • 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
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/007—Partitions

Definitions

  • the invention relates to a kiln with a furnace housing, in the interior of which a combustion chamber receiving furnace chamber is provided; with a conveyor system, with which the kiln is movable through the furnace chamber; with heaters, with which the furnace chamber and the gas located in the furnace chamber can be heated to the temperature required for firing; and with at least one zone in which a blower is provided, which sucks up rising gases from the furnace chamber and back into the furnace chamber and presses against the kiln.
  • Kilns of this type are known in a great many details (e.g., from US-A-3 869 249).
  • heaters come here all conceivable designs used, with which the furnace chamber and in particular the air located there can be brought to the required temperature.
  • Particularly preferred are open burners, with their combustion gases can be achieved in the furnace chamber turbulence, which are desirable to improve the heat exchange and to even out the temperature distribution.
  • Object of the present invention is to improve a kiln of the type mentioned in such a way that at a faster heating and firing a more uniform temperature distribution in the kiln can be achieved.
  • the heaters are arranged in the upper hall and in the hall of the conveyor system.
  • the "direct firing" of the oven space by the heater preferably a burner, supplemented by a gas circulation (if here and below of "gas” is mentioned, so it is generally to air, when using open burner in to a certain extent may contain combustion gases).
  • a gas circulation if here and below of "gas” is mentioned, so it is generally to air, when using open burner in to a certain extent may contain combustion gases.
  • the fan provided according to the invention, the convection in the furnace chamber is increased in a manner such as the turbulence generated by the burner itself can not achieve.
  • the blowing speed can be chosen so high that the circulated gases flow not only on the outer surfaces of the fuel but possibly also for the most part by the inner channels.
  • a partition wall which separates a suction space from a return space.
  • the efficiency of the fan can be increased and achieve a defined gas circulation.
  • the return space has close to the firing heranvrade bulkhead.
  • the firing material is thus located at the point at which the recirculated gases emerge from the recirculation space and still have a defined, directed flow velocity. This is especially important where internal channels of the fuel are to be flowed through.
  • the return space may be bridged at its end adjacent to the kiln by an outlet grate. This provides for an equalization of the circulation flow.
  • the housing in which in the region of the zones in which hot gases are circulated, the housing is provided with dome-like elevations. In these, due to its temperature rising heated gas can be collected and sucked particularly effective from the fan.
  • inventive concept for continuous kilns, which are equipped with a leading from an inlet to an outlet transport system for the kiln.
  • the kiln shown in the drawing which is generally designated by the reference numeral 1, is used for firing ceramic goods 7 and in particular those which are traversed by inner channels. It has a housing 2, which is supported by feet 3 at a certain distance above the floor 4.
  • the interior of the housing 2, the "furnace chamber” 5, is tunnel-shaped and leads from an outlet to an inlet, both of which are no longer shown in the detail shown in the drawing.
  • the housing 2 of the kiln 1 is enlarged towards the top by dome-like elevations 9.
  • the interior of the dome-like elevations 9 is in each case divided by a partition 10 into a suction space 11 and a return space 12.
  • a fan 13 is arranged, which sucks hot gases through an opening of the partition wall 10 from the suction chamber 11 and discharges into the return chamber 12.
  • Each blower 13 is driven by a motor 14 mounted outside the housing 2 of the kiln 1.
  • the return space 12 is extended downwardly by two bulkheads 15, 16; at its lower end, the return space 12 is straddled by an outlet grate 17. Also at the bulkhead 15 opposite the end of the dome-like elevations 9 each one in the furnace chamber 5 to near the goods 7 zoom reaching bulkhead 18 is attached.
  • the goods to be fired 7 are placed at the inlet to the conveyor system 6 and retracted by this in the interior of the oven chamber 5. With the help of the burner 8, they are increasingly brought to the temperature required for firing, in the area of dome-like elevations 9 is reached.
  • the burner 8 are, as already mentioned, regulated by a temperature control so that in all areas of the oven chamber 5 along the path of movement of the goods 7, a desired temperature profile is maintained.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Furnace Details (AREA)
  • Tunnel Furnaces (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Description

Die Erfindung betrifft einen Brennofen mit einem Ofengehäuse, in dessen Innerem ein das Brenngut aufnehmender Ofenraum vorgesehen ist; mit einem Fördersystem, mit dem das Brenngut durch den Ofenraum bewegbar ist; mit Heizeinrichtungen, mit denen der Ofenraum und das im Ofenraum befindliche Gas auf die zum Brennen erforderlich Temperatur aufheizbar ist; und mit mindestens einer Zone, in welcher ein Gebläse vorgesehen ist, welches aufsteigende eiße Gase aus dem Ofenraum ansaugt un wieder in den Ofenraum zurückführt und gegen das Brenngut drückt.The invention relates to a kiln with a furnace housing, in the interior of which a combustion chamber receiving furnace chamber is provided; with a conveyor system, with which the kiln is movable through the furnace chamber; with heaters, with which the furnace chamber and the gas located in the furnace chamber can be heated to the temperature required for firing; and with at least one zone in which a blower is provided, which sucks up rising gases from the furnace chamber and back into the furnace chamber and presses against the kiln.

Brennofen dieser Art sind in unterschiedlichsten Detail-ausführungen bekannte (z.B. aus US-A-3 869 249). Als Heizeinrichtungen kommmen dabei alle denkbaren Ausführungen zum Einsatz, mit denen der Ofenraum und insbesondere die dort befindliche Luft auf die erforderliche Temperatur gebracht werden können. Besonders bevorzugt sind offene Brenner, mit deren Verbrennungsgasen sich im Ofenraum Turbulenzen erzielen lassen, die zur Verbesserung des Wärmeaustausches und zur Vergleichmäßigung der Temperaturverteilung erwünscht sind.Kilns of this type are known in a great many details (e.g., from US-A-3 869 249). As heaters come here all conceivable designs used, with which the furnace chamber and in particular the air located there can be brought to the required temperature. Particularly preferred are open burners, with their combustion gases can be achieved in the furnace chamber turbulence, which are desirable to improve the heat exchange and to even out the temperature distribution.

Bestimmte Arten von Brenngut, insbesondere Keramikwaren, die von inneren Kanälen durchzogen sind, erwärmen sich in diesen bekannten Brennöfen vergleichsweise langsam und noch immer mit einer verhältnismäßig starken Inhomogenität der inneren Temperaturverteilung, was zu Temperaturspannungen im Brenngut führen kann.Certain types of kiln, in particular ceramic ware, which are traversed by inner channels, heat up comparatively slowly in these known kilns and still with a relatively strong inhomogeneity of the internal temperature distribution, which can lead to temperature stresses in the kiln.

Aufgabe der vorliegenden Erfindung ist es, einen Brennofen der eingangs genannten Art derart fortzubilden, daß bei schnellen Aufheiz- und Brennzeiten eine gleichmäßigere Temperaturverteilung im Brenngut erzielt werden kann.Object of the present invention is to improve a kiln of the type mentioned in such a way that at a faster heating and firing a more uniform temperature distribution in the kiln can be achieved.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Heizeinrichtungen oberhall und unterhall des Fördersystems angeordnet sind.This object is achieved according to the invention the heaters are arranged in the upper hall and in the hall of the conveyor system.

Erfindungsgemäß wird also die "Direktbefeuerung" des Ofenraumes durch die Heizeinrichtung, vorzugsweise einen Brenner, durch eine Gasumwälzung ergänzt (wenn hier und nachfolgend von "Gas" die Rede ist, so handelt es sich dabei im allgemeinen um Luft, die bei Verwendung offener Brenner in gewissem Umfange Verbrennungsgase enthalten kann). Durch das erfindungsgemäß vorgesehene Gebläse wird die Konvektion im Ofenraum in einer Weise vergrößert, wie dies die vom Brenner selbst erzeugten Turbulenzen nicht erzielen können. Die Anblasgeschwindigkeit kann so hoch gewählt werden, daß die umgewälzten Gase nicht nur über die äußeren Oberflächen des Brenngutes strömen sondern ggf. auch zum großen Teil durch dessen innere Kanäle.According to the invention, therefore, the "direct firing" of the oven space by the heater, preferably a burner, supplemented by a gas circulation (if here and below of "gas" is mentioned, so it is generally to air, when using open burner in to a certain extent may contain combustion gases). By the fan provided according to the invention, the convection in the furnace chamber is increased in a manner such as the turbulence generated by the burner itself can not achieve. The blowing speed can be chosen so high that the circulated gases flow not only on the outer surfaces of the fuel but possibly also for the most part by the inner channels.

Vorteilhafterweise ist in der Zone, in welcher die Gasumwälzung stattfindet, eine Trennwand vorgesehen, welche einen Ansaugraum von einem Rückführraum trennt. Auf diese Weise läßt sich der Wirkungsgrad des Gebläses erhöhen und eine definierte Gaszirkulation erreichen.Advantageously, in the zone in which the gas circulation takes place, a partition wall is provided which separates a suction space from a return space. In this way, the efficiency of the fan can be increased and achieve a defined gas circulation.

Dabei ist zweckmäßig, wenn der Rückführraum bis nahe an das Brenngut heranreichende Schotts aufweist. Das Brenngut befindet sich also an derjenigen Stelle, an welcher die umgewälzten Gase aus dem Rückführraum austreten und noch eine definierte, gerichtete Strömungsgeschwindigkeit aufweisen. Dies ist insbesondere dort wichtig, wo innere Kanäle des Brenngutes durchströmt werden sollen.It is expedient if the return space has close to the firing heranreichende bulkhead. The firing material is thus located at the point at which the recirculated gases emerge from the recirculation space and still have a defined, directed flow velocity. This is especially important where internal channels of the fuel are to be flowed through.

Der Rückführraum kann an seinem dem Brenngut benachbarten Ende durch einen Auslaßrost überbrückt sein. Dieser sorgt für eine Vergleichmäßigung der Zirkulationsströmung.The return space may be bridged at its end adjacent to the kiln by an outlet grate. This provides for an equalization of the circulation flow.

Besonders bevorzugt wird diejenige Ausgestaltung des erfindungsgemäßen Brennofens, bei welcher im Bereich der Zonen, in welchen heiße Gase umgewälzt werden, das Gehäuse mit domartigen Erhöhungen versehen ist. In diesen kann das aufgrund seiner Temperatur nach oben steigende erhitzte Gas aufgefangen und besonders effektiv vom Gebläse angesaugt werden.Particularly preferred is the one embodiment of the furnace according to the invention, in which in the region of the zones in which hot gases are circulated, the housing is provided with dome-like elevations. In these, due to its temperature rising heated gas can be collected and sucked particularly effective from the fan.

Besonders geeignet ist das erfindungsgemäße Konzept für Durchlauf-Brennöfen, die mit einem von einem Einlaß zu einem Auslaß führenden Transportsystem für das Brenngut ausgestattet sind.Particularly suitable is the inventive concept for continuous kilns, which are equipped with a leading from an inlet to an outlet transport system for the kiln.

Ein Ausführungsbeispiel der Erfindung wird nachfolgend anhand der Zeichnung näher erläutert; die einzige Figur zeigt ausschnittsweise einen vertikalen Schnitt durch einen Durchlauf-Brennofen.An embodiment of the invention will be explained in more detail with reference to the drawing; the single figure shows a detail of a vertical section through a continuous kiln.

Der in der Zeichnung dargestellte Brennofen, der insgesamt mit dem Bezugszeichen 1 gekennzeichnet ist, dient zum Brennen von Keramikwaren 7 und dabei insbesondere solchen, die von inneren Kanälen durchzogen sind. Er weist ein Gehäuse 2 auf, welches von Füßen 3 in einem bestimmten Abstand über dem Boden 4 getragen ist.The kiln shown in the drawing, which is generally designated by the reference numeral 1, is used for firing ceramic goods 7 and in particular those which are traversed by inner channels. It has a housing 2, which is supported by feet 3 at a certain distance above the floor 4.

Das Innere des Gehäuses 2, der "Ofenraum" 5, ist tunnelartig ausgebildet und führt von einem Auslaß zu einem Einlaß, die beide in dem in der Zeichnung dargestellten Ausschnitt nicht mehr gezeigt sind. Vom Einlaß bis zum Auslaß führt durch den Ofenraum 5 ein Fördersystem 6, im dargestellten Beispiel ein Rollenfördersystem, auf welchem sich die zu brennenden Waren 7 mit im wesentlichen konstanter Geschwindigkeit durch den Ofenraum 5 hindurch bewegen.The interior of the housing 2, the "furnace chamber" 5, is tunnel-shaped and leads from an outlet to an inlet, both of which are no longer shown in the detail shown in the drawing. From the inlet to the outlet through the furnace chamber 5, a conveyor system 6, in the example shown, a roller conveyor system on which the goods to be fired 7 at a substantially constant speed through the oven chamber. 5 move through.

Oberhalb und unterhalb des Fördersystems 6 münden in den Ofenraum 5 Gasbrenner 8, mit welchen in bekannter Weise - temperaturgeregelt - der Ofenraum 5 auf die zum Brennen erforderliche Temperatur gebracht wird.Above and below the conveyor system 6 open into the furnace chamber 5 gas burner 8, with which in a known manner - temperature controlled - the furnace chamber 5 is brought to the required temperature for firing.

Im Bereich bestimmter Zonen, von denen in der Zeichnung zwei dargestellt sind, ist das Gehäuse 2 des Brennofens 1 nach oben hin durch domartige Erhöhungen 9 vergrößert. Der Innenraum der domartigen Erhöhungen 9 ist jeweils durch eine Trennwand 10 in einen Ansaugraum 11 und einen Rückführraum 12 unterteilt. Im oberen Bereich des Rückführraumes 12 ist ein Gebläse 13 angeordnet, welches durch eine Öffnung der Trennwand 10 aus dem Ansaugraum 11 heiße Gase ansaugt und in den Rückführraum 12 abgibt. Jedes Gebläse 13 wird durch einen außerhalb des Gehäuses 2 des Brennofens 1 montierten Motor 14 angetrieben.In the region of certain zones, two of which are shown in the drawing, the housing 2 of the kiln 1 is enlarged towards the top by dome-like elevations 9. The interior of the dome-like elevations 9 is in each case divided by a partition 10 into a suction space 11 and a return space 12. In the upper region of the return chamber 12, a fan 13 is arranged, which sucks hot gases through an opening of the partition wall 10 from the suction chamber 11 and discharges into the return chamber 12. Each blower 13 is driven by a motor 14 mounted outside the housing 2 of the kiln 1.

Der Rückführraum 12 ist nach unten durch zwei Schotts 15, 16 verlängert; an seinem unteren Ende wird der Rückführraum 12 von einem Auslaßrost oder -gitter 17 überspannt. Auch an dem dem Schott 15 gegenüber liegenden Ende der domartigen Erhöhungen 9 ist jeweils ein in den Ofenraum 5 bis nahe an die Waren 7 heranreichendes Schott 18 angebracht.The return space 12 is extended downwardly by two bulkheads 15, 16; at its lower end, the return space 12 is straddled by an outlet grate 17. Also at the bulkhead 15 opposite the end of the dome-like elevations 9 each one in the furnace chamber 5 to near the goods 7 zoom reaching bulkhead 18 is attached.

Der oben beschriebene Durchlauf-Brennofen 1 arbeitet wie folgt:The above-described continuous kiln 1 operates as follows:

Die zu brennenden Waren 7 werden am Einlauf auf das Fördersystem 6 aufgesetzt und durch dieses in das Innere des Ofenraumes 5 eingefahren. Mit Hilfe der Brenner 8 werden sie zunehmend auf die zum Brennen erforderliche Temperatur gebracht, die im Bereich der domartigen Erhöhungen 9 erreicht ist. Die Brenner 8 werden, wie bereits erwähnt, durch eine Temperatursteuerung so geregelt, daß in allen Bereichen des Ofenraumes 5 längs des Bewegungsweges der Waren 7 ein gewünschtes Temperaturprofil aufrecht erhalten wird.The goods to be fired 7 are placed at the inlet to the conveyor system 6 and retracted by this in the interior of the oven chamber 5. With the help of the burner 8, they are increasingly brought to the temperature required for firing, in the area of dome-like elevations 9 is reached. The burner 8 are, as already mentioned, regulated by a temperature control so that in all areas of the oven chamber 5 along the path of movement of the goods 7, a desired temperature profile is maintained.

Im Bereich der domartigen Erhöhungen 9 des Gehäuses 2 des Brennofens 1 steigen die heißen, von den Brennern 8 erwärmten Gase in den Ansaugraum 11 auf, werden dort mit Hilfe des Gebläses 13 in den Rückführraum 12 überführt und sodann unter Druck durch den Auslaßrost 17 gegen die zu brennende Ware 7 geblasen. Diese Waren 7 werden dabei nicht nur außen überströmt; vielmehr treten die umgewälzten Gase auch in die inneren Kanäle der Waren 7 ein und geben über die dortigen inneren Flächen Wärme an die Waren 7 ab.In the area of the dome-like elevations 9 of the housing 2 of the kiln 1 rise the hot, heated by the burners 8 gases in the suction chamber 11, there converted by means of the blower 13 in the return chamber 12 and then under pressure through the outlet grate 17 against the blown to burning goods 7. These goods 7 are not only flowed outside; Rather, the recirculated gases enter into the inner channels of the goods 7 and give on the local inner surfaces heat to the goods 7 from.

Claims (6)

  1. A furnace having a furnace housing (2) in the interior of which a furnace chamber (5) receiving the articles for firing (7) is produced; having a conveyor system (6) by means of which the articles for firing (7) can be moved through the furnace chamber (5); having heating devices (8) by means of which the furnace chamber (5) and the gas located in the furnace chamber (5) can be heated to the necessary temperature for firing; and having at least one zone in which a fan (13) is provided, which draws rising hot gases out of the furnace chamber (5) and returns them to the furnace chamber again and pushes them against the articles for firing,
    characterised in that
    the heating devices (8) are arranged above and below the conveyor system (6).
  2. A furnace according to Claim 1,
    characterised in that
    a dividing wall (10), which separates a suction chamber (11) from a return chamber (12), is provided in the zone.
  3. A furnace according to Claim 2,
    characterised in that
    the return chamber (12) has partitions reaching into the vicinity of the articles for firing (7).
  4. A furnace according to Claim 2 or 3,
    characterised in that
    the return chamber (12) is bridged by an outlet grid (17) at its end adjacent to the articles for firing (7).
  5. A furnace according to one of the preceding claims,
    characterised in that
    the housing (2) is provided with dome-like raised portions (9) in the region of the zones in which hot gases are circulated.
  6. A furnace according to one of the preceding claims,
    characterised in that
    it is fitted as a continuous furnace with a transport system (6) for guiding the articles for firing (7) from an inlet to an outlet.
EP20000108918 1999-05-03 2000-04-27 Firing furnace Revoked EP1050731B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19920136 1999-05-03
DE1999120136 DE19920136B4 (en) 1999-05-03 1999-05-03 kiln

Publications (2)

Publication Number Publication Date
EP1050731A1 EP1050731A1 (en) 2000-11-08
EP1050731B1 true EP1050731B1 (en) 2006-03-08

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EP20000108918 Revoked EP1050731B1 (en) 1999-05-03 2000-04-27 Firing furnace

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6457971B2 (en) * 1999-06-17 2002-10-01 Btu International, Inc. Continuous furnace having traveling gas barrier
CN100469719C (en) 2001-07-11 2009-03-18 弗拉奇塔斯有限公司 Method for conducting heat to a glass sheet
AT412086B (en) * 2003-05-26 2004-09-27 Wienerberger Ag Process for firing ceramic lumpy material, especially bricks, comprises sucking a circulating part of the hot gases from the combustion channel, compressing using a compressor element, and blowing into the combustion channel

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE847426C (en) * 1945-10-31 1952-08-25 Brown Ag Electric tunnel furnace for firing ceramic goods
US3351687A (en) * 1965-01-08 1967-11-07 Midland Ross Corp Method and apparatus for firing ceramic bodies
FR1487284A (en) * 1966-07-22 1967-06-30 B P Przemyslu Hutniczego Furnace with direct heating without chipping of the load, for the heat treatment of metals
US3869249A (en) * 1974-03-22 1975-03-04 Indian Head Inc Curing oven
US3982889A (en) * 1975-07-14 1976-09-28 Olson Benjamin F Preheating system for aluminum remelt furnace
CH624460A5 (en) * 1977-05-24 1981-07-31 Gautschi Electro Fours Sa
FR2524131A1 (en) * 1982-03-25 1983-09-30 Glaskuhl Sa APPARATUS FOR THERMALLY PROCESSING OBJECTS BY CONVECTION
DE3434906C2 (en) * 1984-09-22 1993-03-04 Otto Junker Gmbh, 5107 Simmerath Device for preheating metallic material
FR2584805B1 (en) * 1985-07-12 1989-07-13 Elect Meca Et Const IMPROVEMENT IN DRYING AND COOKING PLANTS FOR CERAMIC PRODUCTS
US5195673A (en) * 1991-09-25 1993-03-23 General Motors Corporation Method and apparatus for convection brazing of aluminum heat exchangers

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DE19920136B4 (en) 2007-07-12
DE50012335D1 (en) 2006-05-04
DE19920136A1 (en) 2000-11-16
EP1050731A1 (en) 2000-11-08

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