EP0350647A1 - Elément de toit ou de mur autoportant et four industriel à hautes températures ainsi équipé - Google Patents

Elément de toit ou de mur autoportant et four industriel à hautes températures ainsi équipé Download PDF

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Publication number
EP0350647A1
EP0350647A1 EP89110900A EP89110900A EP0350647A1 EP 0350647 A1 EP0350647 A1 EP 0350647A1 EP 89110900 A EP89110900 A EP 89110900A EP 89110900 A EP89110900 A EP 89110900A EP 0350647 A1 EP0350647 A1 EP 0350647A1
Authority
EP
European Patent Office
Prior art keywords
wall
insulating
furnace
ceiling element
elements
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.)
Ceased
Application number
EP89110900A
Other languages
German (de)
English (en)
Inventor
Hanns-Wolfgang Dipl.-Ing. Heider
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.)
Kanthal GmbH
Original Assignee
Kanthal 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 Kanthal GmbH filed Critical Kanthal GmbH
Publication of EP0350647A1 publication Critical patent/EP0350647A1/fr
Ceased legal-status Critical Current

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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
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/0003—Linings or walls
    • F27D1/0006—Linings or walls formed from bricks or layers with a particular composition or specific characteristics
    • F27D1/0009—Comprising ceramic fibre elements
    • 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
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/02—Crowns; Roofs
    • F27D1/025—Roofs supported around their periphery, e.g. arched roofs

Definitions

  • the invention relates to heat-insulating wall or ceiling elements made of fiber-ceramic insulating material for high-temperature industrial furnaces and to an industrial furnace equipped with such insulating elements or modules.
  • fiber-ceramic insulating materials in the form of insulating wool, flexible fiber mats or insulating blocks that are dimensionally stable up to certain operating temperatures are increasingly being used in addition to conventional solid linings .
  • the fiber insulation which can be vacuum-formed or cast in the case of block-like elements or modules, consist of fibers with different contents of aluminum oxide, silicon oxide and / or zirconium oxide, which are brought into a shape suitable for lining and insulation of the furnace walls by means of an inorganic or organic binder will.
  • Such reinforced elements are therefore only suitable for small laboratory furnace systems or for low furnace temperatures up to T ⁇ 1300 ° C.
  • the use of support profiles made of silicon infiltrated silicon carbide (SiSiC), which are located directly in the furnace of the furnace, has also already been considered. However, this requires the simultaneous use of thin plates made of refractory ceramic on which the insulating mats or elements are placed. Because of the risk of metallic silicon melting out of the SiSiC, combined with frequently observed crack formation, a temperature of T max 1300 ° C. also results in this case when the furnace lining is reinforced as the highest operating limit.
  • the invention is therefore based on the object of providing a secure support for the thermal insulation lining made of fiber-ceramic insulating materials of high-temperature furnaces, which is absolutely dimensionally stable even at high temperatures and enables very simple installation of furnace linings.
  • the insulation body preferably consists of high-temperature-resistant aluminum oxide and / or zirconium oxide-containing fiber material which is bound by means of an organic binder, the cavities adapted to the reinforcing elements being molded into the insulation body or introduced by a mechanical processing method. Furthermore, the cavities are preferably designed as hollow channels penetrating the insulating body and the reinforcing elements as reinforcing bars with a form-fitting adaptation to the hollow channels.
  • the reinforcing elements or rods can be surrounded by a chemically stable intermediate layer in the form of a non-woven material.
  • the reinforcement elements are preferred elements or rods with a chemically stable coating at high temperatures.
  • the reinforcing bars preferably have a square, rectangular or circular cross section and preferably consist of self-bonded silicon carbide of the type RSiC, SSiC or SiSiC, that is to say from materials which do not contain a glass phase and therefore do not deform even at high temperatures.
  • separating layer surrounding the reinforcing elements to avoid chemical reactions
  • this can be applied by coating processes known per se, for example by engobing or by means of plasma spraying processes.
  • the insulating body itself is preferably made of a high temperature resistant fiber material made of aluminum silicate type A0 and an organic low-alkali binder with SiO2 as the main component.
  • the main advantage of the invention is that even for industrial furnaces of large dimensions and for comparatively high operating temperatures, special fastening elements to be mounted separately for fastening the insulation to the furnace housing, but also complex vaulted ceiling constructions can be avoided.
  • the assembly of such industrial furnaces is therefore considerably simplified.
  • a ceramic insulating body reinforced according to the invention preferably has a length of at least 1000 mm. Depending on the length of the available reinforcement elements, lengths of the insulating bodies of 3000 mm for furnace temperatures up to 1600 ° C are easily possible.
  • the cross section of the reinforcing elements should be as possible can be chosen small in order to reduce undesired heat flow to the furnace side wall.
  • these can each have a groove-shaped recess on the side faces and a web on the opposite side, which is dimensioned such that a quasi-seamless connection results with the groove of the next insulating body according to the tongue and groove principle .
  • the modules are then expediently installed by simply putting them together, the ceiling elements then being supported on the side walls of the furnace lining.
  • Another possibility for a space-saving construction is to extend the reinforcing bars beyond the fiber insulation bodies of ceiling elements and to connect them directly to the outer wall of the stove.
  • the shrinkage which usually occurs under the action of high temperatures in the case of fiber insulating bodies of the type mentioned can be avoided either by appropriate thermal pretreatment at temperatures which are just above the operating temperature. Another possibility is to subsequently fill the resulting gaps with fiber mat material.
  • the wall or ceiling elements according to the invention With the wall or ceiling elements according to the invention, the lining of large industrial furnace systems, which are preferably used in periodic operation, is made possible. The assembly and repair of such ovens is made considerably easier.
  • FIG. 1 shows a vacuum-shaped fiber insulation module to be used as a heat-insulating wall or ceiling element, the fiber material of which contains Al2O3, about 3 to 4% SiO2 and some trace components as the main component and is characterized by a melting point T s > 2000 ° C.
  • a hollow space 3 which is rectangular in the illustrated example and is enclosed on all sides by fiber insulation material, is left out or introduced by subsequent mechanical processing.
  • a rod-shaped reinforcing element 2 with a rectangular cross section made of recrystallized silicon carbide is fitted into the cavity 3 in a form-fitting manner.
  • the length of the rod-shaped reinforcing element formed in the example shown as a hollow profile is dimensioned such that the material of the fiber insulating body protrudes sufficiently far at both ends to prevent harmful heat flow in the direction of the furnace wall.
  • the fiber insulation module is designed like a board or board and has a web 6 with a rectangular cross-section along one longitudinal edge and one along the other longitudinal edge large rectangular, groove-shaped recess 7. As already stated, large-area linings can be easily achieved by simply joining the individual fiber insulation modules.
  • the lining of the furnace shown in Fig. 2 takes place so that the side walls 81, 82 or the rear wall 9 abut each other and the ceiling elements 1 rest on the furnace side walls 81, 82.
  • this first layer of fiber insulation modules reinforced with SiC elements further layers 10 of flexible insulation mats can be arranged, which together with the first layer 1 ensure the required insulation effect.
  • a self-supporting metallic outer wall 4 surrounds the entire furnace and closes it tightly.
  • An industrial furnace with an insulation lining made of fiber insulation modules reinforced according to the invention can be used in air with furnace temperatures of up to 1600 ° C. in periodic or continuous operation without deformation, in particular on ceiling modules.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
EP89110900A 1988-06-22 1989-06-15 Elément de toit ou de mur autoportant et four industriel à hautes températures ainsi équipé Ceased EP0350647A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19883821099 DE3821099A1 (de) 1988-06-22 1988-06-22 Selbsttragendes wand- oder deckenelement und damit ausgeruesteter hochtemperatur-industrieofen
DE3821099 1988-06-22

Publications (1)

Publication Number Publication Date
EP0350647A1 true EP0350647A1 (fr) 1990-01-17

Family

ID=6357019

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89110900A Ceased EP0350647A1 (fr) 1988-06-22 1989-06-15 Elément de toit ou de mur autoportant et four industriel à hautes températures ainsi équipé

Country Status (2)

Country Link
EP (1) EP0350647A1 (fr)
DE (1) DE3821099A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0386555A1 (fr) * 1989-03-04 1990-09-12 Linn High Therm Gmbh Revêtement d'isolation pour une installation de chauffage à haute température et utilisation de celui-ci
EP1528343A1 (fr) * 2003-10-27 2005-05-04 Siemens Aktiengesellschaft Tuile réfractaire avec des éléments de renforcement noyés pour révêtement d'une chambre de combustion de turbines à gaz

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19545681A1 (de) * 1995-12-07 1997-06-12 Caruso Gmbh Vliesstoff Werk Po Isolationselement
DE10160898A1 (de) * 2001-12-12 2003-06-26 Jouri Pinaev Das Futter von Industrieöfen
DE102007056957B4 (de) * 2007-11-27 2014-07-17 Hans Lingl Anlagenbau Und Verfahrenstechnik Gmbh & Co. Kg Kammerwand für eine Trockenkammer oder Brennkammer oder einen Tunnelofen zur Herstellung von Bauelementen aus keramischen oder ähnlichem Material und Wandmodul für eine solche Kammerwand
DE102008019774A1 (de) * 2008-04-18 2009-10-29 Beck Packautomaten Gmbh & Co. Kg Schrumpftunnel
DE102010016511A1 (de) * 2010-04-19 2011-10-20 Roth & Rau Ag Thermische Isolation

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2060847A (en) * 1979-10-11 1981-05-07 Studiceram Spa Pre-fabricated beam element for self-supporting flat vaults of tunnel-type furnaces
FR2529541A1 (fr) * 1982-06-30 1984-01-06 Didier Werke Ag Element de construction composite, constitue par au moins deux parties en des materiaux fibreux differents, son procede de fabrication et son utilisation
FR2557829A1 (fr) * 1984-01-05 1985-07-12 Didier Werke Ag Procede de fabrication d'elements de construction composites de structure sandwich a base de materiaux fibreux differents

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2040415A (en) * 1979-01-11 1980-08-28 Morgan Refractories Ltd Improvements in refractory lining units
DE3510146A1 (de) * 1985-03-21 1986-10-02 Kanthal GmbH, 6082 Mörfelden-Walldorf Verfahren zum verstaerken eines isolationskoerpers aus keramischem fasermaterial sowie zum verbinden derartiger isolationskoerper miteinander

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2060847A (en) * 1979-10-11 1981-05-07 Studiceram Spa Pre-fabricated beam element for self-supporting flat vaults of tunnel-type furnaces
FR2529541A1 (fr) * 1982-06-30 1984-01-06 Didier Werke Ag Element de construction composite, constitue par au moins deux parties en des materiaux fibreux differents, son procede de fabrication et son utilisation
FR2557829A1 (fr) * 1984-01-05 1985-07-12 Didier Werke Ag Procede de fabrication d'elements de construction composites de structure sandwich a base de materiaux fibreux differents

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0386555A1 (fr) * 1989-03-04 1990-09-12 Linn High Therm Gmbh Revêtement d'isolation pour une installation de chauffage à haute température et utilisation de celui-ci
EP1528343A1 (fr) * 2003-10-27 2005-05-04 Siemens Aktiengesellschaft Tuile réfractaire avec des éléments de renforcement noyés pour révêtement d'une chambre de combustion de turbines à gaz
WO2005043058A2 (fr) * 2003-10-27 2005-05-12 Siemens Aktiengesellschaft Element d'ecran thermique destine notamment a la garniture d'une paroi d'une chambre de combustion
WO2005043058A3 (fr) * 2003-10-27 2005-08-11 Siemens Ag Element d'ecran thermique destine notamment a la garniture d'une paroi d'une chambre de combustion
JP2007510121A (ja) * 2003-10-27 2007-04-19 シーメンス　アクチエンゲゼルシヤフト 熱シールド要素
US7540710B2 (en) 2003-10-27 2009-06-02 Siemens Aktiengesellschaft Turbine blade for use in a gas turbine
US7805945B2 (en) 2003-10-27 2010-10-05 Siemens Aktiengesellschaft Thermal shield, especially for lining the wall of a combustion chamber
US8857190B2 (en) 2003-10-27 2014-10-14 Siemens Aktiengesellschaft Heat shield element, in particular for lining a combustion chamber wall

Also Published As

Publication number Publication date
DE3821099A1 (de) 1989-12-28

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