EP0276585B1 - Dispositif de chauffage d'un bain, notamment d'un bain de galvanisation - Google Patents

Dispositif de chauffage d'un bain, notamment d'un bain de galvanisation Download PDF

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Publication number
EP0276585B1
EP0276585B1 EP87400210A EP87400210A EP0276585B1 EP 0276585 B1 EP0276585 B1 EP 0276585B1 EP 87400210 A EP87400210 A EP 87400210A EP 87400210 A EP87400210 A EP 87400210A EP 0276585 B1 EP0276585 B1 EP 0276585B1
Authority
EP
European Patent Office
Prior art keywords
bath
heating
cover
channel
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.)
Expired - Lifetime
Application number
EP87400210A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0276585A1 (fr
Inventor
Claude Ballin
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.)
Cessione Nouvelle Des Metaux Ste
Original Assignee
Civile Bretsurf Ste
Gaz de France SA
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
Priority to FR8511893A priority Critical patent/FR2585728B1/fr
Application filed by Civile Bretsurf Ste, Gaz de France SA filed Critical Civile Bretsurf Ste
Priority to ES87400210T priority patent/ES2023201B3/es
Priority to EP87400210A priority patent/EP0276585B1/fr
Priority to AT87400210T priority patent/ATE63143T1/de
Priority to DE8787400210T priority patent/DE3769784D1/de
Publication of EP0276585A1 publication Critical patent/EP0276585A1/fr
Application granted granted Critical
Publication of EP0276585B1 publication Critical patent/EP0276585B1/fr
Priority to GR91401115T priority patent/GR3002427T3/el
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D17/00—Constructional parts, or assemblies thereof, of cells for electrolytic coating
    • C25D17/02—Tanks; Installations therefor
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/003—Apparatus
    • C23C2/0036—Crucibles
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D21/00—Processes for servicing or operating cells for electrolytic coating
    • C25D21/02—Heating or cooling

Definitions

  • the present invention relates to a device for heating a bath, in particular a galvanizing bath.
  • Another way to heat the bath is to immerse refractory heating elements, in the form of pots, inside which are gas burners or electric heating elements.
  • the improvement in efficiency provided by this solution is especially advantageous in the case of electric heating. Indeed, in the case of gas burners, the circulation of hot gases in the pots causes relatively large losses reducing the efficiency of heating by direct contact with the bath.
  • these heating devices using heating pots immersed in the bath have the significant disadvantage of constituting a bulky means, which is immersed in the bath. Indeed, the conductivity of the wall of refractory material of the pots bulky, which is immersed in the bath. Indeed, the conductivity of the wall of refractory material of the pots limits the power that each pot can provide. Depending on the volume of the bath, its nature and the temperature, it is necessary to multiply the pots. This clogs the bath and hinders the installation of various devices.
  • the aim of the present invention is to remedy these drawbacks and proposes to create a means of heating a bath and in particular a galvanizing bath, which allows very efficient heating with high efficiency, a simple implementation, very flexible operation and leaving the bath accessible from all sides.
  • the invention relates to a heating device, characterized in that it consists of a cover, the underside of which is intended to come onto the surface of the bath, this cover being provided with partitions delimiting at least one channel. open towards the bath, and a heating means opening into the channel to heat the surface of the bath.
  • This heating device is placed on the bath and floats on its surface.
  • the bath thus delimits the cover channel to create a volume for direct heating of the bath partly by conduction and partly by radiation.
  • the heating means is an electric heating means placed in the channel.
  • the atmosphere of the channel remains the same since there is no circulation of gas (air) in the channel, except the circulation currents resulting from convection.
  • the heating means is a burner opening at the entrance to the channel.
  • a gas circulation is established in the channel. This gas circulation is in contact with the surface of the bath and ensures, at least in part, its heating, the complementary part of the heating being provided by the radiation from the walls of the channel.
  • the fumes are recovered by an evacuation pipe smoke connected to the channel outlet.
  • This second solution makes it possible, by adjusting the oxidizing mixture, to have a reducing atmosphere on the surface of the bath, which is advantageous in particular in the case of a galvanizing bath.
  • the cover has only one channel having a meandering path occupying almost the entire surface of the cover.
  • the cover and the partitions of the cover which delimit the channel or channels are generally made of refractory materials.
  • This cover is advantageously provided on the outside with an insulating layer preventing heat loss.
  • This cover thus generally has the double advantage of ensuring direct heating of the bath by contact between the heating means or the hot air and the surface of the bath.
  • This cover also has the advantage of isolating a large part of the surface of the bath and of avoiding heat losses.
  • the cover is at least partially double walled to create a path for the circulation of the air supplying the burner. This preheats the combustion gases.
  • the dimensioning of the cover, its surface or the splitting of the cover into several separate elements or the multiplication of the covers on the surface of the bath depend on the working conditions. It should however be noted that the covers floating on the surface of the bath do not require any support means and the only space requirement that they create is that of the supply of the heating means and, if necessary, the connection of the smoke evacuation. However, these means can arrive vertically to the right of the cover. Thus, access to the bath is free over the entire perimeter of the crucible, which constitutes a non-negligible advantage.
  • the atom sphere in the heating chamber of the cover being reducing, this avoids the oxidation of the galvanizing bath (zinc) and the formation of floating layers on the surface of the bath, as exists in the case of vaults. There is therefore no insulating layer between the bath itself and the heating cover. In this way, the surface of the bath allows an excellent heat exchange between the heating means and the bath.
  • the device for heating a bath consists of a cover 2 provided with peripheral walls 3 and intermediate partitions 4, not continuous from one end to the other of the cover to form a channel 5, going from the inlet 6 at the outlet 7 of the cover.
  • This channel 5 receives a heating means either electric or gas.
  • the electric heating means is constituted by a set of resistors distributed in the channel 5. As in this case, there is no circulation of smoke or combustion gases, the inlet 6 and the outlet 7 are closed. In the case of a gas burner 8, there is gas circulation in the direction of the arrows 9, between the inlet 6 and the smoke outlet 7.
  • channel 5 has a meandering path for the circulation of gases.
  • the adjustment of the fuel mixture supplying the burner 8 makes it possible to establish in the channel 5 which forms a heating chamber, an advantageous reducing atmosphere in the case of the use of this heating device for a galvanizing bath (Zn). This in fact prevents the oxidation of the bath and the formation of an insulating crust on the surface 1 of the bath.
  • Pipes 10 are also provided in the thickness of the cover. These pipes are used for supplying fuel or combustion air and allow the preheating of this combustion air, in particular at the level of part 51 of channel 5, the part into which the burner 8 opens and which is the hottest.
  • the cover is also provided with an outer, insulating, thermal layer 11.
  • the heating chamber or channel 5 is constituted only by a single channel, the heating chamber can be constituted by several parallel channels with circulation of the combustion gases in the same direction or counter-direction.
  • the partitions 4 can go from one end to the other of the cover and delimit parts 51, 52, 53, 54 separated from each other.
  • the temperature of the gases leaving through the evacuation duct connected to the outlet 7 is equal to the temperature of the bath. It is possible to exhaust these gases and lower their temperature (which in some cases can be of the order of 400 °), using a heating coil (not shown) provided around the outlet 7 and serving the preheating of combustion gases.
  • combustion gases can also be used to heat other parts of the installation.
  • the cover is preferably made of a refractory material which cannot be attacked by the bath, in particular zinc in the case of a galvanizing bath, which has a high insulating and reflecting power and which is of low density or d '' a density compatible with the density of the bath to ensure floating.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electrochemistry (AREA)
  • Mechanical Engineering (AREA)
  • Coating With Molten Metal (AREA)
EP87400210A 1985-08-02 1987-01-30 Dispositif de chauffage d'un bain, notamment d'un bain de galvanisation Expired - Lifetime EP0276585B1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
FR8511893A FR2585728B1 (fr) 1985-08-02 1985-08-02 Dispositif de chauffage d'un bain, notamment d'un bain de galvanisation
ES87400210T ES2023201B3 (es) 1987-01-30 1987-01-30 Dispositivo de calentamiento de un baño, especialmente de un baño de galvanizacion
EP87400210A EP0276585B1 (fr) 1987-01-30 1987-01-30 Dispositif de chauffage d'un bain, notamment d'un bain de galvanisation
AT87400210T ATE63143T1 (de) 1987-01-30 1987-01-30 Vorrichtung zur beheizung eines bades, insbesondere eines verzinkungsbades.
DE8787400210T DE3769784D1 (de) 1987-01-30 1987-01-30 Vorrichtung zur beheizung eines bades, insbesondere eines verzinkungsbades.
GR91401115T GR3002427T3 (en) 1987-01-30 1991-08-02 Apparatus for heating a bath, especially a galvanising bath

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP87400210A EP0276585B1 (fr) 1987-01-30 1987-01-30 Dispositif de chauffage d'un bain, notamment d'un bain de galvanisation

Publications (2)

Publication Number Publication Date
EP0276585A1 EP0276585A1 (fr) 1988-08-03
EP0276585B1 true EP0276585B1 (fr) 1991-05-02

Family

ID=8198184

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87400210A Expired - Lifetime EP0276585B1 (fr) 1985-08-02 1987-01-30 Dispositif de chauffage d'un bain, notamment d'un bain de galvanisation

Country Status (5)

Country Link
EP (1) EP0276585B1 (es)
AT (1) ATE63143T1 (es)
DE (1) DE3769784D1 (es)
ES (1) ES2023201B3 (es)
GR (1) GR3002427T3 (es)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE518792A (es) *
FR811784A (fr) * 1936-10-09 1937-04-22 Viellard Migeon Et Cie Four à galvaniser
GB613196A (en) * 1943-11-06 1948-11-23 Ove Falck Holm Apparatus for coating metal wires or tapes with a different metal from a molten pool
DE1000205B (de) * 1955-11-17 1957-01-03 Gewerkschaft Kraft Drahtverzinkungsofen
DE1109001B (de) * 1958-04-24 1961-06-15 Walter Koerner K G Ind Ofen Un Oberflaechenbeheizter Verzinkungsofen
DE1191199B (de) * 1962-07-14 1965-04-15 Walter Koerner K G Ind Ofen Un Oberflaechenbeheizter Verzinkungsofen mit keramischer Wanne und einem ueber dieser luftdicht angeordneten, als Feuerungsraum ausgebildeten Deckel
FR1358951A (fr) * 1963-06-12 1964-04-17 Couvercle chauffant pour des bains métalliques à chauffer par en haut, en particulier pour des fours de galvanisation et d'aluminiage
DE1189101B (de) * 1963-06-21 1965-03-18 Alfred Keller Dr Ing Vorrichtung zur Waermebehandlung von Eisen- und Stahldraehten, Baendern und anderen laenglichen Gegenstaenden
DE2215671B2 (de) * 1972-03-30 1975-10-09 Walter Koerner Kg, Industrieofenbau, 5800 Hagen Deckelbeheizter Verzinkungsofen
FR2585728B1 (fr) * 1985-08-02 1992-10-09 Bretsurf Ste Civile Dispositif de chauffage d'un bain, notamment d'un bain de galvanisation

Also Published As

Publication number Publication date
GR3002427T3 (en) 1992-12-30
ES2023201B3 (es) 1992-01-01
EP0276585A1 (fr) 1988-08-03
DE3769784D1 (de) 1991-06-06
ATE63143T1 (de) 1991-05-15

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