EP0283869A2 - Dispositif pour l'exposition à un courant de gaz d'objets comprenant des surfaces plates dans un assemblage ayant des espaces ventilables - Google Patents

Dispositif pour l'exposition à un courant de gaz d'objets comprenant des surfaces plates dans un assemblage ayant des espaces ventilables Download PDF

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Publication number
EP0283869A2
EP0283869A2 EP88103834A EP88103834A EP0283869A2 EP 0283869 A2 EP0283869 A2 EP 0283869A2 EP 88103834 A EP88103834 A EP 88103834A EP 88103834 A EP88103834 A EP 88103834A EP 0283869 A2 EP0283869 A2 EP 0283869A2
Authority
EP
European Patent Office
Prior art keywords
flow
blow
goods
nozzles
channels
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
EP88103834A
Other languages
German (de)
English (en)
Other versions
EP0283869A3 (en
EP0283869B1 (fr
Inventor
Carl Prof. Dr.-Ing. Cramer
Reinhard Prof. Dr.-Ing. Grundmann
Bernhard Dipl.-Ing. Hilge
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.)
3A Composites International AG
Original Assignee
Alusuisse Lonza Services Ltd
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 Alusuisse Lonza Services Ltd filed Critical Alusuisse Lonza Services Ltd
Priority to AT88103834T priority Critical patent/ATE78581T1/de
Publication of EP0283869A2 publication Critical patent/EP0283869A2/fr
Publication of EP0283869A3 publication Critical patent/EP0283869A3/de
Application granted granted Critical
Publication of EP0283869B1 publication Critical patent/EP0283869B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F27B17/00—Furnaces of a kind not covered by any of groups F27B1/00 - F27B15/00
    • F27B17/0016—Chamber type furnaces
    • F27B17/0083—Chamber type furnaces with means for circulating the atmosphere
    • 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
    • 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • 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
    • F27B9/14—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
    • F27B9/22—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 on rails, e.g. under the action of scrapers or pushers
    • 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 a device for the flow application of flat material in an arrangement with flowable spaces between the type specified in the preamble of claim 1.
  • Areal goods are understood to mean, in particular, plates, laminated cores, ingots and sheets which are produced from metallic, but also from non-metallic materials, for example from ceramics.
  • These areal goods can either be arranged in stacks with clear spaces between them or in the form of rows, i.e. the two-dimensional goods are arranged vertically next to each other.
  • flat goods also includes layers of bars, profiles or narrow bars or stacks of baskets which are filled with bulk goods or small good parts.
  • the goods to be treated form at least one horizontal position or can be positioned vertically with a small width dimension relative to the height and have spaces that can be flowed through.
  • reversing flaps are particularly problematic when they have to be used in larger heat treatment systems with higher temperatures. In these cases, the reversing flaps can warp and jam, which leads to frequent malfunctions or even business interruptions.
  • axial fans Another disadvantage of axial fans is that they usually have to be installed in a wall in high-temperature systems for storage reasons. This asymmetrical installation results in different outputs for the two directions of rotation of the fan wheel despite its corresponding adaptation and design. The differences in the heat transfer due to this can in principle be compensated for by a correspondingly longer treatment time of the goods. However, these longer treatment times lead to increased operating and thus manufacturing costs, so that the aim is generally to shorten the treatment times.
  • the invention is therefore based on the object of providing a device for the flow application of flat material of the type specified, in which the disadvantages mentioned above do not occur.
  • the advantages achieved with the invention are based on the fact that the reversing effect required for uniform flow application of the stack of a flat material or the series of flat material elements is achieved by a suitable design of the flow drive and flow guidance. Because with the blow-out channels or nozzles arranged offset on both sides of the stack of goods or the series of goods, the material is conveyed over relatively narrow zones with different flow directions, that is to say in the Countercurrent. In this way, the same effect results as in a reversing system, without the flow direction having to be reversed. This effect can be enhanced by moving the stack of goods back and forth during the blowing in the longitudinal direction, that is to say perpendicular to the blowing devices. Since the stack of goods is introduced into the device in the same direction, the charging device, which is generally present anyway, is suitable for this, at most with a small modification.
  • the "universal blow chamber” constructed in this way can be operated with particularly high gas capacity flows because of its favorable flow design, which means that a uniform temperature can be achieved in the material to be heated, for example in heat treatment systems; moreover, the residence time of the goods can be shortened and the efficiency of the entire system can be increased, so that overall the operating costs are reduced. And finally, the inner housing can be constructed in a simple manner from many identical parts, so that a particularly cost-effective production is possible.
  • four bars 12 arranged one above the other to form a stack in the case illustrated by way of example are to be formed by means of suitable spacers, e.g. simple square profiles, kept at a distance, are acted upon by a gas flow for the purpose of heat treatment.
  • a radial fan 14 is arranged vertically above the stack of bars 12 and conveys its volume flow into a housing 16 which blows out on two sides. From this housing 16, which opens into a collecting channel or box 17 on each blow-out side, blow-out channels 18 are supplied which are offset from one another on the two sides of the stack from the bars 12. In the embodiment shown, two blow-out channels 18 are provided on each side of the stack of goods, the other half of the housing 16 with the blow-out channels 18 being arranged in a rotationally symmetrical manner as shown in FIG. 2.
  • each return flow space 20 has a blow-out channel 18 in the center on the other side of the stack of goods 12.
  • the treatment gas which has passed through the intermediate spaces between the layers of the material stack 12 (see FIG. 1, where the direction of flow is indicated by the arrows), is removed from the treatment space and fed to the suction space 22 of the radial fan 14 through the return flow spaces 20.
  • blow-out ducts 18, which serve as inflow ducts, are dimensioned such that a uniform inflow velocity is achieved over the entire duct length, that is to say over the entire height of the stack of goods 12.
  • blow-out channels 18 are provided with a strong side contraction, for example in accordance with a Borda inlet, as shown in FIG. when the outlet cross section of the blow-out channels 18 tapers suddenly in the flow direction. This allows the otherwise occurring expansion of the emerging jet during inflation to be limited to the long sides of the material, that is to say the bars 12.
  • the treatment gas flows downward from the radial fan 14 arranged vertically above the stack of goods 12, then through the outlet ducts into the spaces 13 between individual bars 12 of the stack and finally on the opposite side through the backflow spaces 20 back into the suction chamber 22 of the radial fan 14, so that, as is customary in systems of this type, a closed circuit results.
  • Heating or cooling devices for the circulated gas stream can either in the collecting channels 17 or at the ends of the two-way blowing fan housing 16 on the fan pressure side or in the suction chamber 22 on the fan suction side. Such devices are not shown in the figures since their embodiment is generally known.
  • FIG. 5 shows a cross section through such a device, with bars 32 placed on edge on a suitable support or transport construction, indicated by the I-profiles 40, forming a good series and therefore appearing in the figure in plan view as a rectangular area.
  • the spatial arrangement of the bars 32 can be seen in particular from FIG. 7, in which the gaps 33 between the bars forming the good row 32 are also shown.
  • the gaps are formed, for example, by placing the bars in the middle of so-called shoes, designated 40 in FIGS will.
  • a flow channel 35 supplies three rows of nozzles 34 aligned with three adjacent gaps 33. Between the flow channels 35, large spaces are created due to the curved or cranked shape of the outer nozzle tubes 36 b.
  • the nozzles 34 are arranged offset on the upper flow channel 35 a and the lower flow channel opposite this net, so that the gaps in question are mutually partially flowed through from above and partly from below.
  • a fan can be provided to supply only one pair of flow channels 35 a and 35 b, or several pairs.
  • the gas flow takes place in a closed circuit, as shown with the schematic flow arrows in FIG.
  • the arrangement of heating or cooling devices the same basic considerations apply as for the previously described embodiment of the device for the flow loading of material stacks.
  • a further equalization of the flow loading can be achieved in that the flat material, in particular a stack of goods, is moved back and forth in an oscillating movement in the direction of its horizontal longitudinal axis during the blowing; the amplitude of this back and forth movement is adjusted so that it corresponds to the division of the blowing device, for example the blowing device 18 in the embodiment according to FIGS. 1 to 4.
  • the intermediate layers or spacers or the transverse frame supports in the described embodiments should also be matched to the division of the blowing device in order to achieve a very homogeneous flow admission.
  • the mutually directed gas flows in the interstices of the good locations can thereby be largely distinguished from one another, since mixing with the opposing neighboring flows is largely avoided; this in turn allows the flow velocity in the channel formed in this way, viewed in the direction of flow, to be maintained longer.
  • FIG. 9a shows two views of a stack of plates, ingots and sheets, the individual, horizontal layers being separated from one another by intermediate layers and thereby forming intermediate spaces, as can be seen in the illustration on the right.
  • FIG. 9b shows a stack of goods, in which the three upper layers are formed by bolts and rods and the lower layer by narrow bars. This position is held by mutually supported frames, which are shown in the right view of Figure 9b without the good.
  • FIG. 9c finally shows several horizontal layers formed by baskets which are stacked on top of one another; these baskets are filled with bulk goods or small parts.
  • the horizontal layers are also arranged so that there are gaps between the individual basket layers.
  • These stacks can e.g. B. be built on a charging device 50 shown in FIG. 10 in the manner of a bogie and be driven into the device with this. With the help of appropriate facilities, e.g. Hydraulic cylinders 51, which are arranged on one or both end faces of the device 10, the material stack 12 is moved back and forth between the two end positions 19a and 19b covering the division of the blow box 18.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Combustion & Propulsion (AREA)
  • Drying Of Solid Materials (AREA)
  • Tunnel Furnaces (AREA)
  • Furnace Details (AREA)
  • Meat, Egg Or Seafood Products (AREA)
  • Furnace Charging Or Discharging (AREA)
EP88103834A 1987-03-12 1988-03-10 Dispositif pour l'exposition à un courant de gaz d'objets comprenant des surfaces plates dans un assemblage ayant des espaces ventilables Expired - Lifetime EP0283869B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88103834T ATE78581T1 (de) 1987-03-12 1988-03-10 Vorrichtung zur stroemungsbeaufschlagung von flaechenhaftem gut in anordnung mit durchstroembaren zwischenraeumen.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3708062 1987-03-12
DE3708062 1987-03-12
DE19873710901 DE3710901A1 (de) 1987-03-12 1987-04-01 Vorrichtung zur stroemungsbeaufschlagung von flaechenhaftem gut in anordnung mit durchstroembaren zwischenraeumen
DE3710901 1987-04-01

Publications (3)

Publication Number Publication Date
EP0283869A2 true EP0283869A2 (fr) 1988-09-28
EP0283869A3 EP0283869A3 (en) 1990-03-14
EP0283869B1 EP0283869B1 (fr) 1992-07-22

Family

ID=25853428

Family Applications (1)

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EP88103834A Expired - Lifetime EP0283869B1 (fr) 1987-03-12 1988-03-10 Dispositif pour l'exposition à un courant de gaz d'objets comprenant des surfaces plates dans un assemblage ayant des espaces ventilables

Country Status (2)

Country Link
EP (1) EP0283869B1 (fr)
DE (2) DE3710901A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0652412A1 (fr) * 1993-11-05 1995-05-10 Schmitz + Apelt LOI Industrieofenanlagen GmbH Four industriel pour le traitement thermique d'une charge dans une enceinte de chauffage
EP2322673A3 (fr) * 2009-11-13 2011-07-27 Ipsen International GmbH Procédé et dispositif de guidage du flux dans des fours industriels pour le traitement à chaud de matières/pièces usinées métalliques
EP2947161A1 (fr) * 2014-05-20 2015-11-25 Schwartz GmbH Dispositif d'application d'un écoulement
EP3404349A1 (fr) * 2017-05-17 2018-11-21 Automation, Press and Tooling, A.P. & T. Aktiebolag Four à convection
CN114959200A (zh) * 2022-04-27 2022-08-30 兴化市天泰合金制品科技有限公司 一种耐磨耐蚀耐热材料加工用热处理装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3938684A1 (de) * 1989-11-22 1991-05-23 Wagner Max Novokeram Trockenvorrichtung fuer die trocknung von guetern, insbesondere keramischen formlingen
DE102008020040A1 (de) * 2007-10-22 2009-04-23 Otto Junker Gmbh Ofensystem zur konvektiven thermischen Behandlung von metallischem Gut und Transporteinheit für das Ofensystem
DE102009048797B3 (de) * 2009-10-08 2011-03-03 Wieland-Werke Ag Wärmebehandlungsanlage und Verfahren zur Wärmebehandlung von Einsatzgut

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB588743A (en) * 1945-02-05 1947-06-02 Frederick Wardle Haywood Furnaces
DE1433849A1 (de) * 1963-12-18 1968-10-17 Inst Ziegelforschung Essen E V Seitliche Einstrahlung von Luft und OEl in den Brennkanal von Tunneloefen
DE1558559C3 (de) * 1967-10-27 1973-10-31 Charles Sidney Muskegon Mich. Flynn (V.St.A.) Heißgas Konvektions Ofen
DD97483A1 (fr) * 1972-07-03 1973-05-14
DE2446983C2 (de) * 1974-10-02 1985-09-19 Kramer, Carl, Prof. Dr.-Ing., 5100 Aachen Vorrichtung zur beidseitigen Beblasung eines bahnförmigen Materials
DE3026132A1 (de) * 1980-07-10 1982-02-11 Carl Prof. Dr.-Ing. 5100 Aachen Kramer Duesensystem
DE3138232C2 (de) * 1981-09-25 1983-09-22 Carl Prof. Dr.-Ing. Kramer Tunnelofen
US4626661A (en) * 1984-04-16 1986-12-02 Lincoln Manufacturing Company, Inc. Air delivery system for an impingement food preparation oven
DE3433433C1 (de) * 1984-09-12 1985-10-24 Otto Junker Gmbh, 5107 Simmerath Vorrichtung zum Erwaermen oder Kuehlen von metallischem Gut

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0652412A1 (fr) * 1993-11-05 1995-05-10 Schmitz + Apelt LOI Industrieofenanlagen GmbH Four industriel pour le traitement thermique d'une charge dans une enceinte de chauffage
EP2322673A3 (fr) * 2009-11-13 2011-07-27 Ipsen International GmbH Procédé et dispositif de guidage du flux dans des fours industriels pour le traitement à chaud de matières/pièces usinées métalliques
EP2947161A1 (fr) * 2014-05-20 2015-11-25 Schwartz GmbH Dispositif d'application d'un écoulement
EP3404349A1 (fr) * 2017-05-17 2018-11-21 Automation, Press and Tooling, A.P. & T. Aktiebolag Four à convection
CN114959200A (zh) * 2022-04-27 2022-08-30 兴化市天泰合金制品科技有限公司 一种耐磨耐蚀耐热材料加工用热处理装置
CN114959200B (zh) * 2022-04-27 2023-02-03 兴化市天泰合金制品科技有限公司 一种耐磨耐蚀耐热材料加工用热处理装置

Also Published As

Publication number Publication date
EP0283869A3 (en) 1990-03-14
DE3710901A1 (de) 1988-09-29
EP0283869B1 (fr) 1992-07-22
DE3710901C2 (fr) 1991-01-24
DE3872905D1 (de) 1992-08-27

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