EP0652412B1 - Four industriel pour le traitement thermique d'une charge dans une enceinte de chauffage - Google Patents

Four industriel pour le traitement thermique d'une charge dans une enceinte de chauffage Download PDF

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Publication number
EP0652412B1
EP0652412B1 EP94116783A EP94116783A EP0652412B1 EP 0652412 B1 EP0652412 B1 EP 0652412B1 EP 94116783 A EP94116783 A EP 94116783A EP 94116783 A EP94116783 A EP 94116783A EP 0652412 B1 EP0652412 B1 EP 0652412B1
Authority
EP
European Patent Office
Prior art keywords
flow
industrial furnace
heat treatment
treatment chamber
charge
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.)
Expired - Lifetime
Application number
EP94116783A
Other languages
German (de)
English (en)
Other versions
EP0652412A1 (fr
Inventor
Dominik Dr. Schröder
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.)
Schmitz and Apelt LOI Industrieofenanlagen GmbH
Original Assignee
Schmitz and Apelt LOI Industrieofenanlagen GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Schmitz and Apelt LOI Industrieofenanlagen GmbH filed Critical Schmitz and Apelt LOI Industrieofenanlagen GmbH
Publication of EP0652412A1 publication Critical patent/EP0652412A1/fr
Application granted granted Critical
Publication of EP0652412B1 publication Critical patent/EP0652412B1/fr
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Classifications

    • 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 feedstock, the is arranged in a batch with flowable spaces in a heat treatment room, with a fan, which promotes a gas flow from an inflow channel to an outflow channel, wherein the inflow channel and the outflow channel essentially opposite one another laterally adjoin the heat treatment room and the inflow channel with Flow baffles is provided.
  • the feed material is arranged in a batch with spaces through which it can flow. Due to a special design of the flow guidance, an even temperature should be achieved be achieved in the batch. With this construction, the use of reversible Current drives, d. H. Reversible flow fans or with complicated flap controls to reverse the direction of the fault be avoided. For uniform flow of the feed material are blow-out ducts or nozzle blow-out ducts or nozzles on both sides of the batch staggered.
  • the object of the invention is accordingly an industrial furnace of the beginning to create the type mentioned, in which a structurally simple manner uniform temperature distribution within the batch is achieved.
  • This object is achieved in that in the heat treatment room in the flow path before the batch at least two with evenly distributed passage openings provided rectification plates arranged one behind the other in the flow direction are.
  • the flow hits evenly from a multitude of evenly distributed passage openings on the batch.
  • 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. Trials have had good results achieved when using three rectification plates. Here is the relationship between Improve the uniformity of flow distribution and the inevitable The best way to increase the pressure drop.
  • the arrangement of the through openings of the rectification plates as well as the respective open area are of the directional stabilizing structure of the batch and of the desired Flow rate dependent.
  • the free passage area is under free space of the openings for the gas flow understood.
  • the dimensioning can be done with the help of simulation programs.
  • the rectification plates can for example designed as perforated perforated sheets, networks or as a mesh be. The use of perforated perforated sheets has proven to be particularly advantageous exposed.
  • the solution according to the invention is structurally very simple and inexpensive.
  • the heat treatment room is fluidically favorable with essentially smooth walls completed.
  • By dispensing with flow impulses from nozzle systems can also with reduced z. B. at half fan speed, so at low flow rate achieves a uniform inflow of the feed material will.
  • the industrial furnace is universally suitable for heating and cooling processes and guarantees the shortest dwell times and thus high efficiency.
  • the rectification plates between the inflow duct and the heat treatment space are advantageous arranged.
  • the rectification plates are preferably arranged at a distance from one another, which is so large that the flow after flowing through a rectification plate can each be equal.
  • each rectification plate increases in the direction of flow, d. that is, the The free area of a rectifying plate is larger than that of an upstream one Rectification plate.
  • An essential development of the invention is that in the outflow channel at least one rectification plate is arranged. This can result in unfavorable outflow conditions, e.g. B. in that the flow behind the batch in a vertical Discharge channel is collected or sucked in by a fan in the middle, be balanced.
  • the passage area within the rectification plate can preferably change, such that the passage area from the area of the main flow to the Areas with lower flow increases.
  • Fig. 1 shows a schematic section through an industrial furnace.
  • An input material is located in an industrial furnace 1 in a heat treatment room 2 3, for example plates, pipes or profiles.
  • the insert 3 is in the Heat treatment room 2 to form a batch 4 with flowable spaces 5 arranged.
  • a fan 6 promotes a gas flow into a side of the heat treatment room 2 adjacent inflow channel 7, which 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 becomes.
  • perforated rectification plates 11 Between the inflow duct 7 and the heat treatment room 2 are three perforated rectification plates 11, in the form of perforated perforated plates, at a distance in the direction of flow arranged one behind the other. The distance is so large that the flow after flowing through the passage openings 12 of each rectification plate 11 can equalize.
  • each rectification plate 11 increases in the direction of flow, d. that is, the free passage area of the passage openings 12 for the gas flow is from Rectifier plate to rectifier plate larger.
  • the outflow conditions are unfavorable. Therefore there is a rectification plate in the outflow channel 11 'arranged.
  • the passage area within the rectification plate 11 changes such that the passage area starts from the area of the main flow increases towards the areas with less flow.
  • the rectification plates 11 also as wire mesh, networks or mesh be trained.

Landscapes

  • 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)

Claims (6)

  1. Four industriel pour le traitement thermique de pièces, formant une charge (4) présentant des espaces intermédiaires d'écoulement (5), placée dans une enceinte de chauffage, le four étant équipé d'un ventilateur (6) déplaçant un courant de gaz à partir d'un canal d'amenée (7) jusqu'à un canal d'évacuation (9), le canal d'amenée (7) et le canal d'évacuation (9), pratiquement opposés l'un à l'autre, sont disposés latéralement, adjacents à l'enceinte de chauffage (2), le canal d'amenée (7) étant muni de tôles de guidage (8),
    caractérisé par le fait
    que dans l'enceinte de chauffage (2), dans le trajet du courant à l'amont de la charge (4), sont disposées l'une derrière l'autre dans le sens de l'écoulement, au moins deux plaques de redressement (11 ) munies d'orifices de passage (12) uniformément répartis.
  2. Four industriel selon la revendication 1,
    caractérisé par le fait
    que lesdites plaques de redressement (11) sont placées entre le canal d'amenée (7) et l'enceinte de chauffage (2).
  3. Four industriel selon la revendication 1 ou 2,
    caractérisé par le fait
    que lesdites plaques de redressement (11) sont disposées l'une derrière l'autre à une distance suffisante pour permettre au courant de gaz de s'égaliser après le passage de chacune desdites plaques de redressement (11).
  4. Four industriel selon l'une des revendications 1 à 3,
    caractérisé par le fait
    que la surface libre, formée par les orifices de passage de chacune desdites plaques de redressement (11), augmente dans le sens de l'écoulement.
  5. Four industriel selon l'une des revendications 1 à 4,
    caractérisé par le fait
    que le canal d'évacuation (9) est muni d'au moins une plaque de redressement (11').
  6. Four industriel selon la revendication 5
    caractérisé par le fait
    que la surface libre de passage de la plaque de redressement (11'), varie, c-à-d. qu'elle augmente dans les zones traversées par un courant plus faible par rapport à la zone traversée par le courant principal.
EP94116783A 1993-11-05 1994-10-25 Four industriel pour le traitement thermique d'une charge dans une enceinte de chauffage Expired - Lifetime EP0652412B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4337533 1993-11-05
DE4337533A DE4337533A1 (de) 1993-11-05 1993-11-05 Industrieofen zur Wärmebehandlung von Einsatzgut, das zu einer Charge in einem Wärmebehandlungsraum angeordnet ist

Publications (2)

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

Family

ID=6501710

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94116783A Expired - Lifetime EP0652412B1 (fr) 1993-11-05 1994-10-25 Four industriel pour le traitement thermique d'une charge dans une enceinte de chauffage

Country Status (3)

Country Link
EP (1) EP0652412B1 (fr)
AT (1) ATE164444T1 (fr)
DE (2) DE4337533A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009048797B3 (de) * 2009-10-08 2011-03-03 Wieland-Werke Ag Wärmebehandlungsanlage und Verfahren zur Wärmebehandlung von Einsatzgut

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE480276C (de) * 1929-07-31 Oswald Heller Dipl Ing Trockenanlage
CH152273A (de) * 1931-01-15 1932-01-31 Ringier & Co Verlagsanstalt Un Vorrichtung zum gleichmässigen Ausblasen oder Absaugen eines Fluidums längs einer bestimmten Strecke.
US3525164A (en) * 1968-12-10 1970-08-25 Wolverine Corp Apparatus for gaseous treatment of moving webs
CH499761A (de) * 1969-05-09 1970-11-30 Gautschi Electro Fours Sa Wärmebehandlungsofen
FR2337863A1 (fr) * 1976-01-07 1977-08-05 Bertin & Cie Four pour bande de materiau soutenue par coussins gazeux
SU1211571A1 (ru) * 1982-06-07 1986-02-15 Предприятие П/Я Г-4908 Проходна конвективна нагревательна печь с поперечной циркул цией теплоносител
DE3536155A1 (de) * 1985-10-10 1987-04-16 Schmetz Kg Kammerofen mit gasumwaelzung
DE3710901A1 (de) * 1987-03-12 1988-09-29 Kramer Carl Vorrichtung zur stroemungsbeaufschlagung von flaechenhaftem gut in anordnung mit durchstroembaren zwischenraeumen
DE3737254A1 (de) * 1987-11-03 1989-05-18 Alusuisse Abkuehl-kammer zur konvektionskuehlung von flaechenhaftem gut
DE8915647U1 (de) * 1989-03-21 1990-12-13 Reinbold, Heinz, Dipl.-Ing., 5200 Siegburg Vorrichtung zur Behandlung von Monofilen
DE4238240A1 (de) * 1992-11-12 1994-05-19 Guenter Lienemann Industrieofe Glühofen für zeitweilig gestapeltes Glühgut

Also Published As

Publication number Publication date
DE59405517D1 (de) 1998-04-30
DE4337533A1 (de) 1995-05-11
ATE164444T1 (de) 1998-04-15
EP0652412A1 (fr) 1995-05-10

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