EP3184892A1 - Brûleur - Google Patents

Brûleur Download PDF

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Publication number
EP3184892A1
EP3184892A1 EP16201595.2A EP16201595A EP3184892A1 EP 3184892 A1 EP3184892 A1 EP 3184892A1 EP 16201595 A EP16201595 A EP 16201595A EP 3184892 A1 EP3184892 A1 EP 3184892A1
Authority
EP
European Patent Office
Prior art keywords
structural element
combustion
burner
burner device
secondary structural
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Withdrawn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
EP16201595.2A
Other languages
German (de)
English (en)
Inventor
Luis Miguel Pacheco Monteiro
Lima Duarte Nuno Fernandes Garcia
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.)
Bosch Termotechnologia SA
Original Assignee
Bosch Termotechnologia 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
Application filed by Bosch Termotechnologia SA filed Critical Bosch Termotechnologia SA
Publication of EP3184892A1 publication Critical patent/EP3184892A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/18—Arrangement or mounting of grates or heating means
    • 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 
    • F23C6/00—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion
    • F23C6/04—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection
    • F23C6/045—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection with staged combustion in a single enclosure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
    • F23D14/08—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with axial outlets at the burner head
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
    • F23D14/82—Preventing flashback or blowback
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2203/00—Gaseous fuel burners
    • F23D2203/10—Flame diffusing means
    • F23D2203/102—Flame diffusing means using perforated plates
    • F23D2203/1023—Flame diffusing means using perforated plates with specific free passage areas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2203/00—Gaseous fuel burners
    • F23D2203/10—Flame diffusing means
    • F23D2203/104—Grids, e.g. honeycomb grids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2209/00—Safety arrangements
    • F23D2209/10—Flame flashback

Definitions

  • the invention is based on a burner device, in particular a gas burner device, having at least one structural element which has a multiplicity of passage recesses for a combustion fluid and which provides at least one combustion surface.
  • the burner device is arranged at least one secondary structural element having a plurality of combustion fluid passage recesses providing at least a second combustion surface and being spaced apart from the structural element viewed along a main flow direction of the combustion fluid.
  • a "burner device” should be understood as meaning, in particular, at least one part, in particular a subassembly, of a burner, in particular of a gas burner.
  • the burner device may also comprise the entire burner, in particular the entire gas burner.
  • the burner device is in particular intended to to burn a combustion fluid and in particular to produce at least one heating flame.
  • provided is intended to be understood in particular specially programmed, designed and / or equipped.
  • the fact that an object is intended for a specific function should in particular mean that the object fulfills and / or executes this specific function in at least one application and / or operating state.
  • a "structural element” is to be understood in particular as a unit, in particular macroscopically and advantageously optically visibly structured unit, in particular passive unit, which is preferably adapted to a shape of a distributor unit of a burner, in particular a gas burner.
  • the structural element may be formed at least partially, preferably at least to a large extent and particularly preferably completely from a porous material, such as a sintered material, a woven fabric, a knitted fabric and / or a perforated plate.
  • the structural element is formed as a grid element.
  • the term "at least a large part” should be understood to mean in particular at least 60%, advantageously at least 70%, preferably at least 80% and particularly preferably at least 90%.
  • a "distributor unit” is to be understood in particular as meaning a unit which is provided to distribute the combustion fluid, at least substantially uniformly, over a defined area, in particular a firing zone, of the burner device, whereby in particular a uniform heating flame front can be produced.
  • the distributor element can have any shape and / or contour that appears expedient to a person skilled in the art, such as, for example, an at least partially spherical, conical, prismatic, ellipsoidal, annular, cylindrical and / or cuboidal shape and / or contour.
  • the distributor element is designed as a distributor plate and particularly preferably arched, in particular in the form of a cylinder jacket, preferably a circular cylinder jacket.
  • a porosity of the distributor unit is in particular between 2% and 25%, preferably between 4% and 20% and particularly preferably between 7% and 15%.
  • a "porosity" of an object should in particular be understood to mean a ratio of a void volume to a total volume of the object.
  • a minimum distance between the distributor unit and the structural unit in a mounted state is a maximum of 10 mm, advantageously at most 5 mm, preferably at most 2.5 mm and particularly preferably at most 1 mm.
  • the structural unit rests on at least a major part of the distributor unit.
  • a "secondary structural element” is to be understood as meaning in particular a unit, in particular a macroscopically and advantageously optically visibly structured unit, which at least partially, preferably at least a large part and particularly preferably entirely of a porous material, such as a sintered material, a tissue , a knit fabric and / or a perforated plate is formed.
  • the secondary structural element is formed as a grid element.
  • the term "spaced" is to be understood in particular that the structural element and the secondary structural element define an air gap, which is arranged between the structural element and the secondary structural element.
  • a generic burner device can be provided with improved operating characteristics.
  • flashbacks in particular flashbacks to a supply line of a combustion fluid
  • flashbacks to a supply line of a combustion fluid can be at least largely prevented.
  • a complex and / or expensive cooling of a burner, in particular a gas burner can be dispensed with in order to prevent flashbacks.
  • a distance between the structural element and the secondary structural element is maximally so great that it is still possible to skip a combustion flame between the structural element and the secondary structural element.
  • the maximum distance is to be selected such that it is possible to skip a combustion flame both from the structural element to the secondary structural element and from the secondary element to the structural element.
  • the maximum distance is particularly dependent on a specific geometry and / or specific performance parameters of a burner, in particular a gas burner.
  • a maximum distance can be determined by simple experiments. As a result, an advantageously reliable function of the burner device can be achieved.
  • an area fraction of the passage openings of the burner element in relation to a total area of the burner element amounts to at least substantially at least substantially 50%.
  • an area fraction of the passage recesses of the secondary structural element in relation to a total area of the secondary structural element is at least substantially at least substantially 50%.
  • the structural element and the secondary structural element are formed at least partially at least substantially identical.
  • the structural element and the secondary structural element may be at least substantially identical in terms of a material and / or with respect to a geometry. As a result, material and / or manufacturing costs can be advantageously reduced.
  • the structural element and the secondary structural element are formed at least partially at least substantially different.
  • the structural element and the secondary structural element can be designed at least substantially differently with regard to a material, with respect to a geometry and / or with respect to a permeability to the combustion fluid. In this way, an advantageous flexibility in the formation of the structural element and the secondary structural element can be made possible.
  • a gas burner in particular a premix gas burner, with at least one burner device according to the invention is proposed.
  • a method for operating a gas burner in which, under normal operating conditions, damage to the gas burner by flashback, by providing a second combustion surface is at least largely prevented.
  • a first Combustion surface provided by a structural element.
  • the second combustion surface is provided in particular by a secondary structural element. Damage to the gas burner by flashbacks, in particular flashbacks to a supply line of a combustion fluid, can thereby be at least largely prevented.
  • the burner device according to the invention should not be limited to the application and embodiment described above.
  • the burner device according to the invention can have a number deviating from a number of individual elements, components and units mentioned herein.
  • FIG. 1 shows a simplified representation of a gas burner 30.
  • the gas burner 30 is designed as Vormischgasbrenner.
  • the gas burner 30 is supplied with a combustion fluid, in particular a fuel gas-air mixture.
  • the gas burner 30 has a burner device 10 with a structural element 12.
  • the structural member 12 has a plurality of combustion fluid passage recesses 26 and provides a first combustion surface 14.
  • the burner apparatus 10 includes a secondary structural element 16 having a plurality of combustion fluid passage recesses 28 providing at least one second combustion surface 18.
  • the secondary structural element 16 viewed along a main flow direction 20 of the combustion fluid, is arranged at a distance from the structural element 12. A distance 22 between the structural element 12 and the secondary structural element 16 is maximally so great that it is still possible to skip a combustion flame 24 between the structural element 12 and the secondary structural element 16.
  • the structural element 12 and the secondary structural element 16 are formed as grid elements.
  • An area ratio of the passage recesses 26 of the structural member 12 in relation to a total area of the structural member 12 is at least 50%.
  • An area ratio of the passage recesses 28 of the secondary structural element 16 in relation to a total area of the secondary structural element 16 is at least 50%.
  • the structural element 12 and the secondary structural element 16 may be formed at least in regions, in particular with respect to a material and / or with respect to a geometry, at least substantially identical. Alternatively, it is also conceivable that the structural element 12 and the secondary structural element 16, in particular with respect to a material, are at least substantially different in terms of geometry and / or with respect to a permeability to the combustion fluid.
  • FIGS. 2 to 4 show a skip of a combustion flame 24 during operation of the gas burner 30.
  • FIG. 2 shows a combustion flame 24, which burns on a second combustion surface 18 provided by the secondary structural element 16. Due to the immediate vicinity of the combustion flame 24 to the secondary structural element 16, there is an overheating of the secondary structural element 16 and a radiation of heat energy 32 in the gap 34 between the secondary structural element 16 and the structural element 12. By the radiated heat energy 32 takes place in the After a period of time dependent on, for example, a composition of the combustion fluid, the combustion flame 24 bounces back onto the second one provided by the secondary structural element 16 Combustion surface 18 (cf. FIG. 3 ). The in the FIGS. 2 to 4 The process shown repeats during operation of the gas burner 30.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Gas Burners (AREA)
EP16201595.2A 2015-12-22 2016-12-01 Brûleur Withdrawn EP3184892A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PT109048A PT109048A (pt) 2015-12-22 2015-12-22 Dispositivo de queimador

Publications (1)

Publication Number Publication Date
EP3184892A1 true EP3184892A1 (fr) 2017-06-28

Family

ID=57482209

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16201595.2A Withdrawn EP3184892A1 (fr) 2015-12-22 2016-12-01 Brûleur

Country Status (2)

Country Link
EP (1) EP3184892A1 (fr)
PT (1) PT109048A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4246043A1 (fr) * 2022-03-18 2023-09-20 Vaillant GmbH Ensemble brûleur à gaz, appareil de chauffage à gaz et utilisation

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0415008A1 (fr) * 1989-08-12 1991-03-06 Klöckner Wärmetechnik Gmbh Zweigniederlassung Hechingen Procédé de combustion dans un brûleur à gaz
WO2013178465A2 (fr) * 2012-06-01 2013-12-05 Ulrich Dreizler Procédé de combustion totale et à bruit réduit d'un mélange combustible-air, et brûleur correspondant
WO2015054323A1 (fr) * 2013-10-07 2015-04-16 Clearsign Combustion Corporation Brûleur à prémélangé à stabilisateur perforé

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0415008A1 (fr) * 1989-08-12 1991-03-06 Klöckner Wärmetechnik Gmbh Zweigniederlassung Hechingen Procédé de combustion dans un brûleur à gaz
WO2013178465A2 (fr) * 2012-06-01 2013-12-05 Ulrich Dreizler Procédé de combustion totale et à bruit réduit d'un mélange combustible-air, et brûleur correspondant
WO2015054323A1 (fr) * 2013-10-07 2015-04-16 Clearsign Combustion Corporation Brûleur à prémélangé à stabilisateur perforé

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4246043A1 (fr) * 2022-03-18 2023-09-20 Vaillant GmbH Ensemble brûleur à gaz, appareil de chauffage à gaz et utilisation

Also Published As

Publication number Publication date
PT109048A (pt) 2017-06-22

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