EP0652412A1 - Industrial furnace for the thermic treatment of a load in a treatment chamber - Google Patents

Industrial furnace for the thermic treatment of a load in a treatment chamber Download PDF

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Publication number
EP0652412A1
EP0652412A1 EP94116783A EP94116783A EP0652412A1 EP 0652412 A1 EP0652412 A1 EP 0652412A1 EP 94116783 A EP94116783 A EP 94116783A EP 94116783 A EP94116783 A EP 94116783A EP 0652412 A1 EP0652412 A1 EP 0652412A1
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EP
European Patent Office
Prior art keywords
flow
industrial furnace
heat treatment
rectification
plates
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Granted
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EP94116783A
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German (de)
French (fr)
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EP0652412B1 (en
Inventor
Dominik Dr. Schröder
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Schmitz and Apelt LOI Industrieofenanlagen GmbH
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Schmitz and Apelt LOI Industrieofenanlagen GmbH
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • C21D1/767—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material with forced gas circulation; Reheating thereof
    • 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
    • F27B17/00—Furnaces of a kind not covered by any preceding group
    • F27B17/0016—Chamber type furnaces
    • F27B17/0083—Chamber type furnaces with means for circulating the atmosphere
    • 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

Definitions

  • the invention relates to an industrial furnace for the heat treatment of feed material, which is arranged in a batch in a heat treatment room, with a fan which promotes a gas flow from an inflow channel to an outflow channel, the inflow channel and the outflow channel essentially being laterally adjacent to the heat treatment room and the inflow channel being provided with flow baffles.
  • the feed material is arranged in a batch with spaces through which it can flow.
  • a special design of the flow control is to achieve a uniform temperature in the batch.
  • the use of reversible flow drives, i. H. Fans with reversible flow direction or with complicated flap controls to reverse the direction of failure can be avoided.
  • Blow-out channels or nozzle blow-out channels or nozzles are arranged offset to one another on both sides of the batch in order to ensure uniform flow of the feed material.
  • the object of the invention is accordingly to provide an industrial furnace of the type mentioned, in which a uniform temperature distribution within the batch is achieved in a structurally simple manner.
  • This object is achieved in that in the heat treatment room in the flow path before the batch at least two rectification plates provided with uniformly distributed through openings are arranged one behind the other in the flow direction.
  • the flow hits the batch evenly from a large number of evenly distributed passage openings.
  • a high level of uniformity in the flow distribution also means an even temperature distribution in the batch.
  • the number of rectification plates is arbitrary. Experiments have given good results using three rectification plates. Here the relationship between improving the flow distribution uniformity and the inevitable increase in pressure loss is best.
  • the arrangement of the through-openings of the straightening plates and the respective open area depend on the direction-stabilizing structure of the batch and on the desired flow rate. Free area is understood to mean the free passage area of the passage openings for the gas flow.
  • the dimensioning can be done with the help of simulation programs.
  • the rectification plates can be designed, for example, as perforated perforated plates, networks or as a mesh. The use of perforated perforated sheets has proven to be particularly advantageous.
  • the solution according to the invention is structurally very simple and inexpensive.
  • the heat treatment room is fluidically closed with essentially smooth walls.
  • the industrial furnace is universally suitable for heating and cooling processes and guarantees the shortest dwell times and thus high efficiency.
  • the rectification plates are advantageously arranged between the inflow duct and the heat treatment space.
  • the rectification plates are preferably arranged at a distance from one another which is so large that the flow can even out after flowing through a rectification plate.
  • each rectification plate increases in the direction of flow, i. that is, the free area of a rectifying plate is larger than that of an upstream rectifying plate.
  • At least one rectification plate is arranged in the outflow channel. This can lead to unfavorable outflow conditions, e.g. B. by the fact that the flow behind the batch is collected in a vertical discharge channel or is sucked in the middle by a fan.
  • the passage area within the rectification plate can preferably change such that the passage area increases from the area of the main flow to the areas with less flow.
  • Fig. 1 shows a schematic section through an industrial furnace.
  • An insert 3 for example plates, pipes or profiles, is located in an industrial furnace 1 in a heat treatment room 2.
  • the feed 3 is arranged in the heat treatment room 2 to form a batch 4 with spaces 5 through which it can flow.
  • a fan 6 promotes a gas flow into an inflow channel 7, which is laterally adjacent to the heat treatment space 2 and is provided with baffles 8.
  • An outflow duct 9 is located opposite the inflow duct 7.
  • a burner 10 heats the gas flow before it is conveyed into the inflow duct 7 by the fan 6.
  • each rectification plate 11 increases in the direction of flow, i. that is, the free passage area of the passage openings 12 for the gas flow increases from rectification plate to rectification plate.
  • a rectification plate 11 ' is therefore arranged in the outflow channel.
  • the passage area within the rectification plate 11 changes in such a way that the passage area increases from the area of the main flow to the areas with less flow.
  • the rectification plates 11 can also be designed as wire grids, networks or mesh grids.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Furnace Details (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)

Abstract

The load (3) is arranged to form a charge (4) in a thermic treatment space (2). Laterally adjacent to the thermic treatment space (2), essentially opposite one another, are an inflow duct (7) and an outflow duct (9). Arranged one behind the other in the direction of flow in the thermic treatment space, in front of the charge (4) in the direction of flow, are at least two rectifying plates (11) with passage openings (12). With the invention, it is intended to produce an industrial furnace, in which uniform temperature distribution inside the charge (4) is achieved in a constructionally simple manner. <IMAGE>

Description

Die Erfindung betrifft einen Industrieofen zur Wärmebehandlung von Einsatzgut, das zu einer Charge in einem Wärmebehandlungsraum angeordnet ist, mit einem Ventilator, der einen Gasstrom von einem Einströmkanal zu einem Ausströmkanal fördert, wobei der Einströmkanal und der Ausströmkanal im wesenlichen gegenüberliegend seitlich an den Wärmebehandlungsraum angrenzen und wobei der Einströmkanal mit Strömungsleitblechen versehen ist.The invention relates to an industrial furnace for the heat treatment of feed material, which is arranged in a batch in a heat treatment room, with a fan which promotes a gas flow from an inflow channel to an outflow channel, the inflow channel and the outflow channel essentially being laterally adjacent to the heat treatment room and the inflow channel being provided with flow baffles.

Ein derartiger Industrieofen ist aus EP B1 0283869 bekannt.Such an industrial furnace is known from EP B1 0283869.

Das Einsatzgut ist zu einer Charge mit durchströmbaren Zwischenräumen angeordnet. Durch eine besondere Gestaltung der Strömungsführung soll eine gleichmäßige Temperatur in der Charge erreicht werden. Mit dieser Konstruktion soll der Einsatz von reversierbaren Strömungsantrieben, d. h. Ventilatoren mit umkehrbarer Strömungsrichtung oder mit komplizierten Klappensteuerungen zur Umkehr der Störmungsrichtung vermieden werden. Zur gleichmäßigen Strömungsbeaufschlagung des Einsatzgutes sind zu beiden Seiten der Charge Ausblaskanäle oder Düsenausblaskanäle oder Düsen versetzt zueinander angeordnet.The feed material is arranged in a batch with spaces through which it can flow. A special design of the flow control is to achieve a uniform temperature in the batch. With this construction, the use of reversible flow drives, i. H. Fans with reversible flow direction or with complicated flap controls to reverse the direction of failure can be avoided. Blow-out channels or nozzle blow-out channels or nozzles are arranged offset to one another on both sides of the batch in order to ensure uniform flow of the feed material.

Der in der EP-B1 0283 869 beschriebenen Lösungsweg ist konstruktiv sehr aufwendig. Außerdem ist die Vergleichmäßigung der Temperatur in der Charge weiter zu verbessern, insbesondere in horinzontaler Richtung.The solution described in EP-B1 0283 869 is structurally very complex. In addition, the homogenization of the temperature in the batch must be further improved, especially in the horizontal direction.

Die Aufgabe der Erfindung besteht demgemäß darin, einen Industrieofen der eingangs genannten Art zu schaffen, bei dem auf konstruktiv einfacher Art und Weise eine gleichmäßige Temperaturverteilung innerhalb der Charge erreicht wird.The object of the invention is accordingly to provide an industrial furnace of the type mentioned, in which a uniform temperature distribution within the batch is achieved in a structurally simple manner.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß im Wärmebehandlungsraum im Strömungsweg vor der Charge mindestens zwei mit gleichmäßig verteilten Durchtrittsöffnungen versehene Gleichrichtplatten in Strömungsrichtung hintereinander angeordnet sind.This object is achieved in that in the heat treatment room in the flow path before the batch at least two rectification plates provided with uniformly distributed through openings are arranged one behind the other in the flow direction.

Von den Gleichrichtplatten aus trifft die Strömung gleichmäßig aus einer Vielzahl von gleichmäßig verteilten Durchtrittsöffnungen auf die Charge. Eine hohe Gleichmäßigkeit in der Strömungsverteilung bedeutet zugleich auch eine gleichmäßige Temperaturverteilung in der Charge.From the rectification plates, the flow hits the batch evenly from a large number of evenly distributed passage openings. A high level of uniformity in the flow distribution also means an even temperature distribution in the batch.

Die Anzahl der Gleichrichtplatten ist beliebig. Bei Versuchen wurden gute Ergebnisse bei der Verwendung von drei Gleichrichtplatten erzielt. Hier ist das Verhältnis zwischen Verbesserung der Vergleichmäßigung der Strömungsverteilung und der unvermeidliche Erhöhung des Druckverlustes am besten.The number of rectification plates is arbitrary. Experiments have given good results using three rectification plates. Here the relationship between improving the flow distribution uniformity and the inevitable increase in pressure loss is best.

Die Anordnung der Durchtrittsöffnungen der Gleichrichtplatten sowie die jeweilige Freifläche sind von dem richtungsstabilisierenden Aufbau der Charge und von der gewünschten Strömungsgeschwindigkeit abhängig. Unter Freifläche wird die freie Durchtrittsfläche der Durchtrittsöffnungen für den Gasstrom verstanden. Die Dimensionierung kann mit Hilfe von Simulationsprogrammen erfolgen. Die Gleichrichtplatten können beispielsweise als perforierte Lochbleche, Netzwerke oder als Maschengitter ausgebildet sein. Als besonders vorteilhaft hat sich die Verwendung von perforierten Lochblechen herausgestellt.The arrangement of the through-openings of the straightening plates and the respective open area depend on the direction-stabilizing structure of the batch and on the desired flow rate. Free area is understood to mean the free passage area of the passage openings for the gas flow. The dimensioning can be done with the help of simulation programs. The rectification plates can be designed, for example, as perforated perforated plates, networks or as a mesh. The use of perforated perforated sheets has proven to be particularly advantageous.

Der erfindungsgemäße Lösungsweg ist konstruktiv sehr einfach und kostengünstig. Der Wärmebehandlungsraum ist strömungstechnisch günstig mit im wesentlichen glatten Wänden abgeschlossen. Durch den Verzicht auf Strömungsimpulse aus Düsensystemen kann auch bei verringerter z. B. bei halber Ventilatordrehzahl, also bei geringer Strömungsleistung eine gleichmäßige Anströmung des Einsatzgutes erreicht werden. Der Industrieofen ist universell für Erwärmungs- und Kühlvorgänge geeignet und garantiert kürzeste Verweilzeiten und somit hohe Wirkungsgrade.The solution according to the invention is structurally very simple and inexpensive. The heat treatment room is fluidically closed with essentially smooth walls. By dispensing with flow impulses from nozzle systems, even with reduced z. B. at half the fan speed, so with a low flow rate, a uniform inflow of the feed can be achieved. The industrial furnace is universally suitable for heating and cooling processes and guarantees the shortest dwell times and thus high efficiency.

Vorteilhafterweise sind die Gleichrichtplatten zwischen Einströmkanal und Wärmebehandlungsraum angeordnet.The rectification plates are advantageously arranged between the inflow duct and the heat treatment space.

Vorzugsweise sind die Gleichrichtplatten mit einem Abstand zueinander angeordnet, der so groß ist, daß sich die Strömung nach dem Durchströmen einer Gleichrichtplatte jeweils vergleichmäßigen kann.The rectification plates are preferably arranged at a distance from one another which is so large that the flow can even out after flowing through a rectification plate.

Bei stark heterogenen Strömungsverhältnissen ist es besonders vorteilhaft, wenn die Durchtrittsfläche jeder Gleichrichtplatten in Strömungsrichtung zunimmt, d. h., daß die Freifläche einer Gleichtrichtplatte jeweils größer ist als diejenige einer stromauf angeordneten Gleichrichtplatte.In the case of highly heterogeneous flow conditions, it is particularly advantageous if the passage area of each rectification plate increases in the direction of flow, i. that is, the free area of a rectifying plate is larger than that of an upstream rectifying plate.

Eine wesentliche Weiterbildung der Erfindung besteht darin, daß im Abströmkanal mindestens eine Gleichrichtplatte angeordnet ist. Dadurch können ungünstige Abströmverhältnisse, z. B. dadurch, daß die Strömung hinter der Charge in einem senkrechten Abströmkanal gesammelt oder mittig von einem Ventilator angesogen wird, ausgeglichen werden.An essential development of the invention is that at least one rectification plate is arranged in the outflow channel. This can lead to unfavorable outflow conditions, e.g. B. by the fact that the flow behind the batch is collected in a vertical discharge channel or is sucked in the middle by a fan.

Vorzugsweise kann sich die Durchtrittsfläche innerhalb der Gleichrichtplatte ändern, derart, daß die Durchtrittsfläche vom Bereich der Hauptströmung ausgehend, zu den Bereichen mit geringerer Strömung hin zunimmt.The passage area within the rectification plate can preferably change such that the passage area increases from the area of the main flow to the areas with less flow.

Die Erfindung wird im folgenden anhand einer bevorzugten Ausführungsform des erfindungsgemäßen Industrieofens im Zusammenhang mit der Zeichnung näher erläutert.The invention is explained below with reference to a preferred embodiment of the industrial furnace according to the invention in connection with the drawing.

Die Zeichnung zeigt in:
   Fig. 1 einen schematischen Schnitt durch einen Industrieofen.The drawing shows in:
Fig. 1 shows a schematic section through an industrial furnace.

In einem Industrieofen 1 befindet sich in einem Wärmebehandlungsraum 2 ein Einsatzgut 3, beispielsweise Platten, Rohre oder Profile. Das Einsatzgut 3 ist in dem Wärmebehandlungsraum 2 zu einer Charge 4 mit durchströmbaren Zwischenräumen 5 angeordnet. Ein Ventilator 6 fördert einen Gasstrom in einen seitlich an den Wärmebehandlungsraum 2 angrenzenden Einströmkanal 7, der mit Leitblechen 8 versehen ist.An insert 3, for example plates, pipes or profiles, is located in an industrial furnace 1 in a heat treatment room 2. The feed 3 is arranged in the heat treatment room 2 to form a batch 4 with spaces 5 through which it can flow. A fan 6 promotes a gas flow into an inflow channel 7, which is laterally adjacent to the heat treatment space 2 and is provided with baffles 8.

Gegenüber dem Einströmkanal 7 befindet sich ein Ausströmkanal 9. Ein Brenner 10 beheizt den Gasstrom, bevor dieser vom Ventilator 6 in den Einströmkanal 7 gefördert wird.An outflow duct 9 is located opposite the inflow duct 7. A burner 10 heats the gas flow before it is conveyed into the inflow duct 7 by the fan 6.

Zwischen Einströmkanal 7 und Wärmebehandlungsraum 2 sind drei perforierte Gleichrichtplatten 11, in Form von perforierten Lochblechen, in Strömungsrichtung mit Abstand hintereinander angeordnet. Der Abstand ist jeweils so groß, daß sich die Strömung nach dem Durchströmen der Durchtrittsöffnungen 12 jeder Gleichrichtplatte 11 vergleichmäßigen kann.Between the inflow duct 7 and the heat treatment room 2, three perforated rectification plates 11, in the form of perforated perforated plates, are arranged one behind the other in the flow direction. The distance is so large that the flow can even out after flowing through the openings 12 of each rectifying plate 11.

Die freie Durchtrittsfläche jeder Gleichrichtplatte 11 nimmt in Strömungsrichtung zu, d. h., die freie Durchtrittsfläche der Durchtrittsöffnungen 12 für den Gasstrom wird von Gleichrichtplatte zu Gleichrichtplatte größer.The free passage area of each rectification plate 11 increases in the direction of flow, i. that is, the free passage area of the passage openings 12 for the gas flow increases from rectification plate to rectification plate.

Da die Strömung hinter der Charge in einem senkrechten Abströmkanal gesammelt wird, sind die Abströmverhältnisse ungünstig. Daher ist im Abströmkanal eine Gleichrichtplatte 11' angeordnet. Die Durchtrittsfläche innerhalb der Gleichrichtplatte 11 ändert sich derart, daß die Durchtrittsfläche vom Bereich der Hauptströmung ausgehend zu den Bereichen mit geringerer Strömung hin zunimmt.Since the flow behind the charge is collected in a vertical outflow channel, the outflow conditions are unfavorable. A rectification plate 11 'is therefore arranged in the outflow channel. The passage area within the rectification plate 11 changes in such a way that the passage area increases from the area of the main flow to the areas with less flow.

Im Rahmen der Erfindung sind ohne weiteres Abwandlungsmöglichkeiten gegeben. So können die Gleichrichtplatten 11 auch als Drahtgitter, Netzwerke oder Maschengitter ausgebildet sein.Within the scope of the invention, modification options are readily available. The rectification plates 11 can also be designed as wire grids, networks or mesh grids.

Claims (6)

Industrieofen zur Wärmebehandlung von Einsatzgut, das zu einer Charge in einem Wärmebehandlungsraum angeordnet ist, mit einem Ventilator, der einen Gasstrom von einem Einströmkanal zu einem Ausströmkanal fördert, wobei der Einströmkanal und der Ausströmkanal seitlich im wesentlich gegenüberliegend an den Wärmebehandlungsraum angrenzen und wobei im Einströmkanal Strömungsleitbleche vorgesehen sind,
dadurch gekennzeichnet,
daß im Wärmebehandlungsraum (2) im Strömungsweg vor der Charge (4) mindestens zwei mit gleichmäßig verteilten Durchtrittsöffnungen (12) versehene Gleichrichtplatten (11) in Strömungsrichtung hintereinander angeordnet sind.Industrial furnace for the heat treatment of feed material, which is arranged in a batch in a heat treatment room, with a fan which promotes a gas flow from an inflow channel to an outflow channel, the inflow channel and the outflow channel adjoining the heat treatment room on the side essentially opposite and with flow guide plates in the inflow channel are provided
characterized,
that in the heat treatment chamber (2) in the flow path upstream of the charge (4) at least two rectification plates (11) provided with uniformly distributed through openings (12) are arranged one behind the other in the flow direction. Industrieofen nach Anspruch 1,
dadurch gekennzeichnet,
daß die Gleichrichtplatten (11) zwischen Einströmkanal (7) und Wärmebehandlungsraum (2) angeordnet sind.Industrial furnace according to claim 1,
characterized,
that the rectification plates (11) are arranged between the inflow channel (7) and the heat treatment chamber (2). Industrieofen nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
daß die Gleichrichtplatten (11) mit einem Abstand zueinander zugeordnet sind, der so groß ist, daß sich der Gasstrom nach dem Durchströmen jedes Gleichrichtbleches (11) vergleichmäßigen kann.Industrial furnace according to claim 1 or 2,
characterized,
that the rectification plates (11) are assigned to each other at a distance which is so large that the gas flow can even out after flowing through each rectification plate (11). Industrieofen nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet,
daß die freie Durchtrittsfläche jeder Gleichrichtplatte (11) in Strömungsrichtung zunimmt.Industrial furnace according to one of claims 1 to 3,
characterized,
that the free passage area of each rectification plate (11) increases in the direction of flow. Industrieofen nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet,
daß im Abströmkanal (9) mindestens eine Gleichrichtplatte (11') angeordnet ist.Industrial furnace according to one of claims 1 to 4,
characterized,
that at least one rectification plate (11 ') is arranged in the outflow channel (9). Industrieofen nach Anspruch 5,
dadurch gekennzeichnet,
daß sich die freie Durchtrittsfläche innerhalb der Gliechrichtplatte (11') derart ändert, daß die Durchtrittsfläche vom Bereich der Hauptströmung ausgehend zu den Bereichen mit geringerer Strömung hin zunimmt.Industrial furnace according to claim 5,
characterized,
that the free passage area within the straightening plate (11 ') changes in such a way that the passage area increases from the area of the main flow to the areas with less flow.
EP94116783A 1993-11-05 1994-10-25 Industrial furnace for the thermic treatment of a load in a treatment chamber Expired - Lifetime EP0652412B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4337533 1993-11-05
DE4337533A DE4337533A1 (en) 1993-11-05 1993-11-05 Industrial furnace for heat treatment of feed material, which is arranged in a batch in a heat treatment room

Publications (2)

Publication Number Publication Date
EP0652412A1 true EP0652412A1 (en) 1995-05-10
EP0652412B1 EP0652412B1 (en) 1998-03-25

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EP94116783A Expired - Lifetime EP0652412B1 (en) 1993-11-05 1994-10-25 Industrial furnace for the thermic treatment of a load in a treatment chamber

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EP (1) EP0652412B1 (en)
AT (1) ATE164444T1 (en)
DE (2) DE4337533A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009048797B3 (en) * 2009-10-08 2011-03-03 Wieland-Werke Ag Heat treatment plant comprises a processing chamber and a circulating device for circulating hot gas in a heating circuit supplying heating or cooling gas to processing chamber, where flow channels are arranged into processing chamber

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CH152273A (en) * 1931-01-15 1932-01-31 Ringier & Co Verlagsanstalt Un Device for evenly blowing out or sucking off a fluid along a certain distance.
US3525164A (en) * 1968-12-10 1970-08-25 Wolverine Corp Apparatus for gaseous treatment of moving webs
CH499761A (en) * 1969-05-09 1970-11-30 Gautschi Electro Fours Sa Heat treatment furnace
FR2337863A1 (en) * 1976-01-07 1977-08-05 Bertin & Cie Gas cushion supported strip treatment furnace - has perforated sheet in each plenum chamber to regulate gas flow
EP0283869A2 (en) * 1987-03-12 1988-09-28 Alusuisse-Lonza Services Ag Device to expose to a gas stream objects with flat surfaces in a position which can be traversed
WO1990011482A1 (en) * 1989-03-21 1990-10-04 Heinz Reinbold Process and device for processing monofilaments
DE4238240A1 (en) * 1992-11-12 1994-05-19 Guenter Lienemann Industrieofe Annealing furnace for temporarily stacked material - has chicane device which can be raised or lowered into operating position and has temp. resistant surface covering inner chamber and linked to work table

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Publication number Priority date Publication date Assignee Title
DE480276C (en) * 1929-07-31 Oswald Heller Dipl Ing Drying system
SU1211571A1 (en) * 1982-06-07 1986-02-15 Предприятие П/Я Г-4908 Continuous convection heating furnace with lateral circulation of heat-transfer agent
DE3536155A1 (en) * 1985-10-10 1987-04-16 Schmetz Kg Chamber furnace with gas circulation
DE3737254A1 (en) * 1987-11-03 1989-05-18 Alusuisse COOLING CHAMBER FOR CONVECTION COOLING OF SURFACE GOODS

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH152273A (en) * 1931-01-15 1932-01-31 Ringier & Co Verlagsanstalt Un Device for evenly blowing out or sucking off a fluid along a certain distance.
US3525164A (en) * 1968-12-10 1970-08-25 Wolverine Corp Apparatus for gaseous treatment of moving webs
CH499761A (en) * 1969-05-09 1970-11-30 Gautschi Electro Fours Sa Heat treatment furnace
FR2337863A1 (en) * 1976-01-07 1977-08-05 Bertin & Cie Gas cushion supported strip treatment furnace - has perforated sheet in each plenum chamber to regulate gas flow
EP0283869A2 (en) * 1987-03-12 1988-09-28 Alusuisse-Lonza Services Ag Device to expose to a gas stream objects with flat surfaces in a position which can be traversed
WO1990011482A1 (en) * 1989-03-21 1990-10-04 Heinz Reinbold Process and device for processing monofilaments
DE4238240A1 (en) * 1992-11-12 1994-05-19 Guenter Lienemann Industrieofe Annealing furnace for temporarily stacked material - has chicane device which can be raised or lowered into operating position and has temp. resistant surface covering inner chamber and linked to work table

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Publication number Publication date
DE59405517D1 (en) 1998-04-30
EP0652412B1 (en) 1998-03-25
DE4337533A1 (en) 1995-05-11
ATE164444T1 (en) 1998-04-15

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