EP2420744A1 - Echangeur thermique à gaz pour appareils de traitement d'aliments et un tel appareil - Google Patents

Echangeur thermique à gaz pour appareils de traitement d'aliments et un tel appareil Download PDF

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Publication number
EP2420744A1
EP2420744A1 EP10173308A EP10173308A EP2420744A1 EP 2420744 A1 EP2420744 A1 EP 2420744A1 EP 10173308 A EP10173308 A EP 10173308A EP 10173308 A EP10173308 A EP 10173308A EP 2420744 A1 EP2420744 A1 EP 2420744A1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
combustion chamber
gas
gas heat
connecting element
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.)
Withdrawn
Application number
EP10173308A
Other languages
German (de)
English (en)
Inventor
Ilmar NEUMEISER
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.)
Eloma GmbH
Original Assignee
Eloma 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 Eloma GmbH filed Critical Eloma GmbH
Priority to EP10173308A priority Critical patent/EP2420744A1/fr
Priority to PCT/EP2011/061912 priority patent/WO2012022546A1/fr
Publication of EP2420744A1 publication Critical patent/EP2420744A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/32—Arrangements of ducts for hot gases, e.g. in or around baking ovens
    • F24C15/322—Arrangements of ducts for hot gases, e.g. in or around baking ovens with forced circulation
    • F24C15/327—Arrangements of ducts for hot gases, e.g. in or around baking ovens with forced circulation with air moisturising
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C3/00—Combustion apparatus characterised by the shape of the combustion chamber
    • F23C3/002—Combustion apparatus characterised by the shape of the combustion chamber the chamber having an elongated tubular form, e.g. for a radiant tube
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/32—Arrangements of ducts for hot gases, e.g. in or around baking ovens
    • F24C15/322—Arrangements of ducts for hot gases, e.g. in or around baking ovens with forced circulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M2900/00—Special features of, or arrangements for combustion chambers
    • F23M2900/05004—Special materials for walls or lining

Definitions

  • the present invention relates to a gas heat exchanger for food processing equipment, in particular combi steamers.
  • the present invention relates to such a device for the treatment of food.
  • the heat exchange medium used here is hot exhaust gas, which is produced during the combustion of a gas-air mixture in a gas burner.
  • This gas burner is installed in a combustion chamber limited by a shell, which is an integral part of the gas heat exchanger.
  • the hot exhaust gas generated in the combustion chamber is introduced via a connecting element in the subsequent heat exchanger tube, flows through this and exits at an exhaust gas outlet again.
  • more than one heat exchanger tube for example, three heat exchanger tubes are provided on the gas heat exchanger, which extend parallel to each other to the fan.
  • the gas burner participates only indirectly in the heat exchanger work, ie that the water to be evaporated is also evaporated at the wall of the combustion chamber in addition to the evaporation on the heat exchanger tubes.
  • a connecting element is provided, which is formed in more than one heat exchanger tube as a branch pipe and also on him the sprayed water is evaporated.
  • the present invention is therefore based on the object to propose a gas heat exchanger, which has a long service life in steam generation in Wassersprüh compiler and copes well with the stresses of thermal cycling, especially thermal shocks and additional occurrence of corrosion mechanisms.
  • the gas heat exchanger is characterized in that the casing of the combustion chamber and / or the connecting element are formed of a material which is selected from the group of austenitic stainless steels which are free to exit substantially sigma phases and in which essentially does not form a sigma phase during operation.
  • the material of the gas heat exchanger has a high nickel content.
  • the salt melt resistance can be further improved.
  • the nickel content in the material is at least 25%.
  • a plurality of heat exchanger tubes are present, for example, three parallel tubes, which are formed from a sheet material, wherein the connecting element which is provided between the combustion chamber and the heat exchanger tubes is preferably formed instead of sheet of a cast steel element.
  • the material of the gas heat exchanger is salt-melt resistant. This has the advantage that dissolved in the injection water salts have no negative impact on the material of the gas heat exchanger.
  • the present invention also includes a food processing apparatus in which steam is generated by means of a gas heat exchanger.
  • the device is characterized in that the gas heat exchanger is designed according to one of claims 1 to 5.
  • Fig. 1 is shown in perspective view and schematically a gas heat exchanger 1.
  • the gas heat exchanger 1 has a gas burner (not shown), which is arranged in a combustion chamber 3, which is bounded by a casing 5.
  • the sheath 5 is formed from a metal sheet.
  • the combustion chamber 3 is arranged vertically in the example case and at its lower end 7, a connecting element 9 connects, which is connected in the illustrated example trap with three parallel heat exchanger tubes 11 and thus serves as a branch pipe.
  • the heat exchanger tubes 11 extend downward from the connecting element 9, then pivot in a horizontal direction and extend below a fan wheel 13. Thereafter, they extend upwardly in a vertical direction and above the fan wheel 13 again horizontally to an outlet 15.
  • the outlet 15 is located in the illustrated example case above the combustion chamber 3rd
  • austenitic stainless steels are suitable as the material which are free both at the outset of sigma phases and during which no sigma phase is formed during the operating time or in the course of use.
  • the connecting element 9 is formed from cast material, for example as a pipe branch, it has been found, for example, as advantageous materials: GX40NiCrSiNb35-26 and GX10NiCrSiNb32-20.
  • the use of the material according to the invention for the heat exchanger tubes may not be necessary.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP10173308A 2010-08-18 2010-08-18 Echangeur thermique à gaz pour appareils de traitement d'aliments et un tel appareil Withdrawn EP2420744A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP10173308A EP2420744A1 (fr) 2010-08-18 2010-08-18 Echangeur thermique à gaz pour appareils de traitement d'aliments et un tel appareil
PCT/EP2011/061912 WO2012022546A1 (fr) 2010-08-18 2011-07-13 Échangeur de chaleur à gaz pour appareils de traitement de produits alimentaires ainsi qu'appareil de ce type

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10173308A EP2420744A1 (fr) 2010-08-18 2010-08-18 Echangeur thermique à gaz pour appareils de traitement d'aliments et un tel appareil

Publications (1)

Publication Number Publication Date
EP2420744A1 true EP2420744A1 (fr) 2012-02-22

Family

ID=43417092

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10173308A Withdrawn EP2420744A1 (fr) 2010-08-18 2010-08-18 Echangeur thermique à gaz pour appareils de traitement d'aliments et un tel appareil

Country Status (2)

Country Link
EP (1) EP2420744A1 (fr)
WO (1) WO2012022546A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3263675A (en) * 1963-12-11 1966-08-02 Gen Motors Corp Utensil support for domestic appliance
EP0333422A1 (fr) * 1988-03-17 1989-09-20 Allegheny Ludlum Corporation Acier austénitique inoxydable
WO1990000238A1 (fr) * 1988-06-29 1990-01-11 Airwall Pty. Ltd. Four
US5165889A (en) * 1989-05-19 1992-11-24 Import-Export Research And Development, Inc. Gas convection oven with heat exchanger and baffles
US6029653A (en) * 1997-05-08 2000-02-29 Henny Penny Corporation Induced draft heat exchanger with serpentine baffles
EP1340945A1 (fr) * 2002-03-01 2003-09-03 eloma GmbH Grossküchentechnik Appareil pour traitement et préparation d'aliments avec réchauffage à gaz et dispositif d' échangeur de chaleur pour un tel appareil

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3263675A (en) * 1963-12-11 1966-08-02 Gen Motors Corp Utensil support for domestic appliance
EP0333422A1 (fr) * 1988-03-17 1989-09-20 Allegheny Ludlum Corporation Acier austénitique inoxydable
WO1990000238A1 (fr) * 1988-06-29 1990-01-11 Airwall Pty. Ltd. Four
US5165889A (en) * 1989-05-19 1992-11-24 Import-Export Research And Development, Inc. Gas convection oven with heat exchanger and baffles
US6029653A (en) * 1997-05-08 2000-02-29 Henny Penny Corporation Induced draft heat exchanger with serpentine baffles
EP1340945A1 (fr) * 2002-03-01 2003-09-03 eloma GmbH Grossküchentechnik Appareil pour traitement et préparation d'aliments avec réchauffage à gaz et dispositif d' échangeur de chaleur pour un tel appareil

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"Materials Selection Considerations for Thermal Process Equipment", 1 November 2004 (2004-11-01), XP055015135, Retrieved from the Internet <URL:http://www1.eere.energy.gov/industry/bestpractices/pdfs/proc_heat_tech_brief.pdf> [retrieved on 20111219] *

Also Published As

Publication number Publication date
WO2012022546A1 (fr) 2012-02-23

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