EP3117146B1 - Multistage surface burner - Google Patents

Multistage surface burner Download PDF

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Publication number
EP3117146B1
EP3117146B1 EP15701036.4A EP15701036A EP3117146B1 EP 3117146 B1 EP3117146 B1 EP 3117146B1 EP 15701036 A EP15701036 A EP 15701036A EP 3117146 B1 EP3117146 B1 EP 3117146B1
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EP
European Patent Office
Prior art keywords
burner
zone
zones
fuel
air mixture
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EP15701036.4A
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German (de)
French (fr)
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EP3117146A1 (en
Inventor
Ulrich Dreizler
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Individual
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Classifications

    • 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
    • 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
    • F23C6/02—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in parallel arrangement
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2203/00—Gaseous fuel burners
    • F23D2203/10—Flame diffusing means
    • F23D2203/101—Flame diffusing means characterised by surface shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2203/00—Gaseous fuel burners
    • F23D2203/10—Flame diffusing means
    • F23D2203/103—Flame diffusing means using screens
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/00012—Liquid or gas fuel burners with flames spread over a flat surface, either premix or non-premix type, e.g. "Flächenbrenner"
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/00019—Outlet manufactured from knitted fibres

Definitions

  • the invention relates to a burner with surface combustion, which comprises a first and at least one further burner zone.
  • a burner with a surface combustion which comprises a burner head with a housing, which has a supply for a fuel-air mixture upstream and a fabric membrane downstream on an outlet side and a flame non-return valve which is arranged at a distance from it upstream of the fabric membrane. wherein the fabric membrane and the flame non-return valve are arranged by at least one releasable connecting element which engages in a receiving area in the housing.
  • a burner with surface combustion which comprises a housing which receives a blower at one end and supplies a fuel-air mixture to burner zones downstream at the opposite end.
  • the burner zones each include a plate with a plurality of holes which is attached to the housing.
  • a further mixing plate with further bores is assigned to these upstream.
  • Combustion air is supplied through the fan. Downstream of the supply of the combustion air, individual supplies for the fuel are provided on the housing.
  • fuel and air are mixed on the mixing plate and fed to the respective burner zone, with partition walls being provided upstream of each burner zone and extending as far as the fuel supply in order to supply the burner zones.
  • all burner zones are supplied with the same air volume flow provided by the fan.
  • a gas burner which comprises three burner zones, each of which is supplied with a gas-air mixture by separate feeds.
  • the gas-air mixture is fed to these three burner zones independently of one another for combustion.
  • the combustion surface or the combustion zone is formed by a truncated cone-shaped surface which comprises a first and a second burner zone.
  • the third burner zone is formed by a hemispherical surface at the narrow end of the truncated conical surface.
  • the flames emerging on the lateral surface of the burner surface are inclined by almost 90 ° with respect to the exit plane in the direction of the center of the combustion chamber, which is downstream of the gas supply. Because of the burner zones in a row, there is a very long combustion chamber required.
  • a gas burner which is used for heating water, which flows through a heat exchanger in a combustion chamber of the gas burner.
  • This gas burner has a first and a second burner zone, the first burner zone comprising a combustion zone oriented radially to the longitudinal axis of the burner.
  • a gas-air mixture is fed to a second burner zone, which comprises both a radially oriented combustion zone corresponding to the first burner zone and a further axially oriented combustion zone, which together form the second burner zone.
  • a structurally complex structure is provided for this.
  • the invention has for its object to provide a burner with a surface system, which is constructed in several zones and includes a small space for arrangement in a burner plate or a burner and an efficient control, and to provide a heat generator that is small in size, but high heat output enables.
  • each burner zone is supplied with a fuel-air mixture by a separate feed and the burner zones have a flame matrix oriented in the same direction.
  • this allows flat burner zones to be created in the installation depth, so that several burner zones can be arranged next to one another, which on the other hand can be controlled by the respective separate supply of fuel-air mixtures in accordance with the desired operating mode.
  • the respective tissue membranes of the burner zones are arranged in the same plane to one another. In this way, a large-area burner can be divided into several burner zones with different or the same area shares and enable separate control.
  • the individual tissue membranes of the burner zones assigned to one another can be offset parallel to one another. This is then preferably provided in order to assign the individual burner zones to one another in a structurally compact manner.
  • a fan for supplying the fuel-air mixture is provided for each burner zone, or a common fan for supplying the fuel-air mixture and a control flap is provided in at least one supply to the burner zones for the burner zones. If for each burner zone A fan for supplying the fuel-air mixture is provided, a specific control and supply of the fuel-air mixture can be achieved for each burner zone, whereby the length of the flame root can also be determined. If a common blower for supplying the fuel-air mixture and a control flap is provided for all burner zones of the burner and in at least one of at least two feeds leading to the respective burner zone, several burner zones can be controlled with only one common blower and by controlling the control flap or control flaps be supplied with the fuel-air mixture.
  • the flame matrix of each burner zone is preferably aligned axially to the direction of flow of the fuel-air mixture between the flame non-return valve and the fabric membrane.
  • the flame matrix is perpendicular to the surface of the fabric membrane, so that the individual flame can freely emerge from the fabric membrane without an inclination or deflection, which enables increased efficiency in combustion and thus increased efficiency in heating the burner chamber.
  • the respective tissue membrane of the burner zones assigned to one another preferably has a maximum offset which is equal to or less than 100 mm when they are arranged with a parallel offset to one another.
  • a homogeneous flame matrix extending over all tissue membranes of the burner zones can thereby be achieved.
  • the length of the flame root of the respective flame matrix is preferably the longest at full load.
  • the first burner zone to be ignited is at least one ignition electrode and / or at least one Monitoring electrode assigned.
  • the first burner zone can be designed as a preliminary stage, which is first ignited and monitored in order to form a flame matrix in the combustion zone.
  • this second or further burner zone can be switched on, the flame matrix of the first burner zone being supplied to the second and / or the fuel-air-gas mixture. or another neighboring burner zone, and forms a common flame matrix with it.
  • a first burner zone is completely surrounded by the second and / or at least one further burner zone.
  • This arrangement can also be interchanged.
  • two burner zones arranged concentrically to one another can be formed, which are usually controlled in such a way that the smaller of the two zones is initially ignited.
  • the combustion zone of the burner provides that the first and at least one further burner zone each have the same proportion of area.
  • the surface of the first burner zone may be different from that of the second or further burner zone, the first burner zone preferably being smaller than the second burner zone in the case of two burner zones.
  • the size ratio of the respective burner zone is determined. This depends on the heat generator to be fired and the downstream heating process.
  • the overall control ratio can be determined from the sum of the maximum output of the first and second burner zones in relation to the minimum output of the first burner zone. The same applies to more than two burner zones.
  • Another preferred embodiment of the invention sees a common one between the first and at least one further burner zone Contact line or a common point of contact of the respective flame matrix.
  • the flames of the flame matrix expand up to the end of the respective flame in the direction of flow of the fuel-air mixture, so that the flame matrix also widens in the edge region of the combustion zone, thereby making it easier to ignite the adjacent combustion zone of a further burner zone.
  • the first and at least one further burner zone preferably have a circular, rectangular or square geometry to form a combustion zone.
  • a circular or square geometry can be provided for a cylindrical burner chamber.
  • an oblong-rectangular burner with a first and second burner zone for strip-shaped and elongated heating zones can be formed and used.
  • the second or further burner zone preferably has two to seven times the surface area of the first burner zone.
  • the first burner zone forms a preliminary stage and the second burner zone, for example, a main stage, preferably together with the preliminary stage, for heating the combustion chamber.
  • a further preferred embodiment of the invention provides that the fuel-air mixture is mixed in front of the at least one fan and the mixture is fed to the at least one burner zone via the fan.
  • the fuel / air mixture can be mixed after the at least one blower and then fed to the at least one burner zone.
  • the term postmix burner is used.
  • a preferred embodiment of the burner with the first and at least one further burner zone provides that these are arranged in a common burner head, so that the first and at least one further burner zone together on one burner plate are arranged to the burner chamber, which can be fastened to a burner housing for closing the burner chamber.
  • the first and at least one further burner zone can each be formed by a separate burner head with a respective housing, which are arranged adjacent or adjacent to one another in a burner plate.
  • the object on which the invention is based is also achieved by a heat generator in which a burner according to one of the above-described embodiments can be used.
  • the heat generator can preferably be provided for heating a liquid, vaporous or gaseous medium, in which a supply line preferably leads into a burner chamber of the housing of the heat generator in order to heat the medium flowing through the line.
  • the line is part of a heat exchanger, for example to heat water.
  • FIG 1 is a schematic sectional view of a burner 13 is shown on a heat generator 11 with a burner chamber 12 into which a heat exchanger or a line 14 carrying liquid medium projects in order to heat up the liquid medium passed through line 14 and to dissipate the thermal energy of the flame.
  • the heat transfer medium can also be vapor or gaseous.
  • the heat generator 11 comprises a housing 16 which has an opening 17 with a pipeline 18 at one end for discharging hot combustion gases. Opposite the burner chamber 12 is closed by a burner plate 21 which receives a burner 13 with a burner head 23 with a fan 24.
  • Such a burner 13 can be operated as a gas appliance in accordance with EN676 "gas blower burner”. Operation in accordance with EN746-2 on thermoprocessing systems in the industrial and commercial sector is also possible. A delimitation of the respective areas of application is described in the associated standards under "Area of application”.
  • air is supplied to the blower 24 via an air supply line 26.
  • a fuel line 27 leads to the blower 24, a certain amount of fuel being supplied to the blower 24 via a solenoid valve 28.
  • This fan 24 preferably has a fan wheel, not shown in detail, so that a fuel-air mixture is generated after the fan 24 and is fed to the burner head 23 via a feed 29.
  • a fuel-air mixture can also be supplied to the blower 24.
  • the control of the solenoid valve 28 for determining the amount of fuel supplied takes place via a control device 40, which can monitor and control the control of the entire combustion process.
  • the burner head 23 further comprises at least one ignition electrode 31 and at least one Monitoring electrode 32, which in Figure 1 are only shown schematically and are also connected to the control device 40 in order to forward data to the control device 40 or to control the ignition electrode 31 to ignite the burner head 24.
  • the burner head 23 according to Figure 1 is constructed, for example, in two stages and comprises a first burner zone 34 and a second burner zone 35. Each of these burner zones 34, 35 can be individually and continuously regulated from the lowest to the highest output.
  • the second burner zone 35 is connected to the second burner zone 35, for example, by a feed 37 leading away from the housing 36 of the first burner zone 34.
  • the feed 37 can also branch off from the feed 29 coming from the blower 24.
  • the feed 37 comprises a control flap 38, which in turn is connected to the control device 40 and can be controlled via it.
  • the burner head 23 comprises a cylindrical housing 36 with a bottom 41, to which the feed 29 is connected, through which the fuel-air mixture is fed to the first burner zone 34 via the fan 24.
  • a housing partition 43 is arranged within the housing 34 to form the first and second burner zones 34, 35, which together with the associated section of the base 41 forms a housing 44 for the first burner zone 34.
  • a housing 45 for the second burner zone 35 is formed by the housing partition 43 of the housing 44 and an outer wall 46 of the housing 34 of the burner head 23.
  • the supply 37 for supplying the fuel-air mixture opens into this outer wall 46.
  • this feed can also be connected to the bottom 41 of the housing 45.
  • the feed 37 can also be arranged on the bottom 41 of the housing 45.
  • the housing 44 of the first burner zone 34 and the housing 45 of the second burner zone 35 are nested and combined with one another, so that the second housing 45 concentrically surrounds the housing 44.
  • a common base 41 is preferably provided for the housing 44, 45.
  • the bottoms of the housings 44, 45 can be arranged offset to one another.
  • the first burner zone 34 comprises a flame non-return valve 48 lying opposite the floor 41 and viewed in the direction of flow of the fuel-air mixture, as well as spaced apart therefrom and a fabric membrane 49 downstream. Downstream of the tissue membrane 49, a combustion zone 51 is provided, within which a flame matrix 52 is formed, the combustion zone 51 being delimited in the radial direction by a delimiting element 54.
  • the first burner zone 34 comprises, for example, an ignition electrode 31 and one or more monitoring electrodes 32, which are arranged, for example, in the center of the first burner zone 34 or in the housing 44 of the first burner zone. Because of this central arrangement of the ignition electrode 31 and the monitoring electrode 32, the feed 29 of the fuel-air mixture is formed on the housing 44 by a fork-shaped connection 56, which for example covers three openings 57 in the base 41.
  • the at least one ignition electrode 31 and / or monitoring electrode 32 can also be arranged in an edge region in the housing 44 of the first burner zone 34, so that a central supply of the fuel-air mixture or in the rest of the region 41 is possible.
  • the second burner zone 35 also comprises a flame non-return valve 48, viewed in the direction of flow, and a tissue membrane 49 at a distance therefrom to form an annular combustion zone 51.
  • Limiting elements 54 are preferably again provided in the housing 45.
  • the limiting element 54 is designed in such a way that the tissue membrane 49 is held down to the spacer element, which positions the tissue membrane 49 at a predetermined distance from the flame flashback barrier 48.
  • Limiting element 54 is designed such that, starting from the operation of the burner head 23 with the first burner zone 34, a switch-on of the second burner zone 35 enables the flame matrix 52 of the second burner zone 35 to be ignited due to the flame matrix 52 in the first burner zone 34.
  • the individual flames 59 emerging from the fabric membrane 49 expand at the end of the individual flames as seen in the direction of flow, so that the flame matrix 52 widens in the edge region of the burner zone 34 and, when the fuel-air mixture is supplied via the adjacent burner zone 35, the burner zone 35 is ignited automatically 51 of the neighboring burner zone.
  • the arrangement and configuration of the burner head 23 with a fabric membrane 49 spaced apart from the flame check valve 49 enables the formation of a cool flame root, in particular when using a fabric membrane 49 according to FIG WO 2012/065582 to which full reference is made.
  • Figure 4 is schematically the arrangement of the fabric membrane 49 of the first burner zone 34 and the second burner zone 35 according to Figure 2 shown, which are aligned with a parallel offset a to each other.
  • a flame matrix 52 is formed on each tissue membrane 49 in the area of the combustion zone 51, which flame matrix is composed of individual flames 59 and holding flames 60 arranged between them, the individual flames 59 emerging from the holding flames 60.
  • the parallel offset between the fabric membrane 49 of the first burner zone 44 to the fabric membrane 49 of the second burner zone 45 corresponds at most to the flame root of the individual flame 59.
  • the maximum offset a also applies to other fabric membranes 49 which are provided in further burner zones in multi-zone burners 11.
  • “Flame root” is understood to mean a zone of the individual flames 59 which keeps this individual flame 59 stabilized, so that it does not stand out from the tissue membrane 49 or can go out.
  • the fuel and oxygen are only partially ignited in the flame root and is partly still separate. Only at the end of the flame root in the flow direction of the fuel-air mixture is the exothermic reaction started completely, which is then completed when the flames burn out. Consequently, the ignition of the combustion reaction in the flame root - i.e. the oxidation of a combustible material with oxygen, which causes the flame to form - has not yet been completed. Unburned constituents of oxygen and combustible material can still be present.
  • the flame root can be identified optically as a flame by its blue core color, which is more intensely visible than the rest of the flame.
  • the offset a can also be zero, that is to say that the fabric membrane 49 of the first burner zone 34 and that of the second burner zone 35 are arranged in the same plane.
  • FIGS 5a and 5b 14 are schematic views illustrating an alternative embodiment with respect to the supply of the fuel-air mixture to the burner head 23 of the burner 11 Figures 1 to 3 demonstrate.
  • the Figure 5a differs from the supply of the fuel-air mixture Figure 1 in that a branch 62 is provided in the feed line 29, which divides the volume flow supplied by the blower 16 in two, so that a separate feed is provided for the first and second fuel stages 34, 35.
  • Each feed 29, 37 comprises a separate control flap 38, which can be controlled separately from each other by the control device 40 in order to regulate the respective volume flow.
  • FIG. 5b shows a feed for a fuel-air mixture to the burner head 23, in which each burner zone 34, 35 is each connected to a feed line 29, 37 to which a fan 24 is connected, so that each burner zone 34, 35 is independent of the other burner zone 35, 34 can be filled with a fuel-air mixture is so that the mixtures can also differ from each other.
  • FIGS. 6a to 6e are schematic views from above of a burner 11 with, for example, two burner zones 34, 35, which have different arrangements and geometries. It goes without saying that instead of two burner zones, it is also possible to provide a plurality of burner zones which have an analog structure.
  • Figure 6a represents an end view of the burner head 23 according to Figure 2 with a round combustion zone 51, the Figure 6a It differs in that the at least one ignition electrode 31 and / or monitoring electrode 32 is not arranged in the center, but rather off-center in the tissue membrane 49 of the first burner zone 34.
  • the second burner zone 35 preferably comprises a multiple of the first burner zone 34 with respect to the areas thereof.
  • the second burner zone 35 completely surrounds the first burner zone 34. These have a common line of contact 64 of the respective flame matrix 52. Along this line of contact 64, the flame matrix 52 of the first burner zone 34 is skipped onto the second burner zone 35 when the second burner zone 35 is switched on.
  • a third burner zone can completely surround the second burner zone or the second and third burner zones together surround the first burner zone.
  • the first burner zone can also have two or more zones and be surrounded by an annular burner zone in analogy to the two-stage burner zone shown.
  • Figure 6b is an alternative embodiment to Figure 6a shown.
  • the first and second burner zones 34, 35 have areas of equal size, which are separated by the contact line 64, in each of which a combustion zone 51 is formed with a semicircle for the first and second burner zones 34, 35.
  • the first burner zone 34 of the combustion zone 51 can also comprise an arc segment and the second burner zone 35 take up the remaining area
  • the Figure 6c shows an alternative geometric configuration of the Combustion zone 51 too Figure 6b , by the first and second burner zones 34, 35 being square, but with the same surface division. Alternatively, at Figure 6c a rectangular arrangement may also be provided.
  • the Figure 6e shows a further alternative embodiment, which comprises a flat-rectangular combustion zone 51 of the first and second burner zones 34, 35, which comprise a common contact line 64.
  • a flat-rectangular combustion zone 51 of the first and second burner zones 34, 35 which comprise a common contact line 64.
  • Such an embodiment is preferably provided in so-called strip burners, the length of which is a multiple of the width.
  • FIG. 7 is an alternative embodiment to Figure 1 shown.
  • the structure of the burner 13 corresponds to that in Figure 1 .
  • the embodiment in FIG Figure 7 to Figure 1 It is provided that two separate burner heads 23 are assigned to one another and are received in a burner plate 21, a burner head 23 forming a first burner zone 34 and a second burner head forming the burner zone 35, which are preferably of different sizes in the area of the combustion zone 51, as shown in the front view in Figure 8 emerges.
  • the second burner zone 35 is preferably at least three times larger, preferably five times larger, than the first burner zone 34.
  • Each burner head 23 is supplied with a fuel-air mixture via a fan 24.
  • Each burner head 23 has one analog structure to the first burner zone 34 or second burner zone 35.
  • a flame non-return valve and a fabric membrane 49 are provided downstream of the supply of the fuel-air mixture, so that a flame matrix 52 can form on an outlet side of the fabric membrane in a combustion zone 51, the individual flames 59 and the holding flame 60 are aligned perpendicular to the plane of the tissue membrane 49. The individual flames 59 are thus aligned in the flow direction within the combustion zone 51.
  • the housings 24 of the burner heads 23 for the first and second burner zones 34, 35 can, for example, adjoin one another at a contact point 65 or be only a short distance apart, and the at least one ignition electrode 31 and / or monitoring electrode 32 can be positioned in a gusset which results from this that a central or off-center arrangement of the ignition electrode 31 and / or monitoring electrode 32 in the first burner zone 34 is not necessary. However, this can also be chosen. This enables the flame matrix 52 to jump from the first burner zone 34 into the second burner zone 35 when the burner 13 is switched on with the second burner zone 35.
  • the ignition electrode 31 and the monitoring electrode 32 can be assigned to the first burner zone 34 and a further monitoring electrode 32 to the second burner zone 35.
  • the ignition electrode 31 and / or monitoring electrode 32 can also be assigned separately from one another corresponding to the first and / or second burner zone 34, 35.
  • the two burner heads 23 are adjusted with respect to the alignment of the tissue membranes 49 in such a way that they lie in one plane or correspond to a maximum offset a Figure 4 exhibit.

Description

Die Erfindung einen Brenner mit einer Oberflächenverbrennung, welcher eine erste und zumindest eine weitere Brennerzone umfasst.The invention relates to a burner with surface combustion, which comprises a first and at least one further burner zone.

Aus der DE 20 2013 102109 U1 ist ein Brenner mit einer Oberflächenverbrennung bekannt, der einen Brennerkopf mit einem Gehäuse umfasst, welches stromauf eine Zuführung für ein Brennstoff-Luft-Gemisch und stromab an einer Austrittsseite eine Gewebemembran aufweist und eine Flammenrückschlagsperre umfasst, welche stromauf der Gewebemembran mit Abstand dazu angeordnet ist, wobei die Gewebemembran und die Flammenrückschlagsperre durch zumindest ein lösbares Verbindungselement, welches in einem Aufnahmebereich im Gehäuse angreift, angeordnet sind.From the DE 20 2013 102109 U1 A burner with a surface combustion is known, which comprises a burner head with a housing, which has a supply for a fuel-air mixture upstream and a fabric membrane downstream on an outlet side and a flame non-return valve which is arranged at a distance from it upstream of the fabric membrane. wherein the fabric membrane and the flame non-return valve are arranged by at least one releasable connecting element which engages in a receiving area in the housing.

Aus der WO 2006/019279 A1 ist ein Brenner mit einer Oberflächenverbrennung bekannt, welcher ein Gehäuse umfasst, das an einem Ende ein Gebläse aufnimmt und am gegenüberliegenden Ende stromab ein Brennstoff-Luft-Gemisch Brennerzonen zuführt. Die Brennerzonen umfassen jeweils eine Platte mit mehreren Bohrungen, die an dem Gehäuse befestigt ist. Diesen ist stromauf eine weitere Vermischungsplatte mit weiteren Bohrungen zugeordnet. Durch das Gebläse wird Verbrennungsluft zugeführt. Stromab der Zuführung der Verbrennungsluft sind an dem Gehäuse einzelne Zuführungen für den Brennstoff vorgesehen. In dem Gehäuse wird Brennstoff und Luft an der Vermischungsplatte gemischt und der jeweiligen Brennerzone zugeführt, wobei stromauf an jede Brennerzone angrenzend Trennwände vorgesehen sind, die sich bis zur Brennstoffzuführung erstrecken, um die Brennerzonen zu versorgen. Alle Brennerzonen werden jedoch einheitlich mit dem gleichen vom Gebläse bereitgestellten Luftvolumenstrom versorgt.From the WO 2006/019279 A1 A burner with surface combustion is known which comprises a housing which receives a blower at one end and supplies a fuel-air mixture to burner zones downstream at the opposite end. The burner zones each include a plate with a plurality of holes which is attached to the housing. A further mixing plate with further bores is assigned to these upstream. Combustion air is supplied through the fan. Downstream of the supply of the combustion air, individual supplies for the fuel are provided on the housing. In the housing, fuel and air are mixed on the mixing plate and fed to the respective burner zone, with partition walls being provided upstream of each burner zone and extending as far as the fuel supply in order to supply the burner zones. However, all burner zones are supplied with the same air volume flow provided by the fan.

Aus der WO 02/075211 A1 ist ein Gasbrenner bekannt, welcher drei Brennerzonen umfasst, denen jeweils durch getrennte Zuführungen ein Gas-Luft-Gemisch zugeführt wird. Diesen drei Brennerzonen wird unabhängig voneinander das Gas-Luft-Gemisch zur Verbrennung zugeführt. Die Brennoberfläche beziehungsweise die Verbrennungszone wird durch eine kegelstumpfförmige Mantelfläche gebildet, welche eine erste und zweite Brennerzone umfasst. Am schmalen stirnseitigen Ende der kegelstumpfförmigen Mantelfläche ist die dritte Brennerzone durch eine halbkugelförmige Oberfläche ausgebildet. Die seitlich an der Mantelfläche der Brenneroberfläche austretenden Flammen sind gegenüber der Austrittsebene um nahezu 90° in Richtung zur Mitte der Brennkammer geneigt, die stromab der Gaszuführung liegt. Durch die hintereinander gereihten Brennerzonen ist eine sehr lange Brennkammer erforderlich.From the WO 02/075211 A1 a gas burner is known which comprises three burner zones, each of which is supplied with a gas-air mixture by separate feeds. The gas-air mixture is fed to these three burner zones independently of one another for combustion. The combustion surface or the combustion zone is formed by a truncated cone-shaped surface which comprises a first and a second burner zone. The third burner zone is formed by a hemispherical surface at the narrow end of the truncated conical surface. The flames emerging on the lateral surface of the burner surface are inclined by almost 90 ° with respect to the exit plane in the direction of the center of the combustion chamber, which is downstream of the gas supply. Because of the burner zones in a row, there is a very long combustion chamber required.

Aus der WO 2010/044931 A1 ist des Weiteren ein Gasbrenner bekannt, der für die Aufheizung für Wasser benutzt wird, welches einen Wärmetauscher in einer Brennkammer des Gasbrenners durchströmt. Dieser Gasbrenner weist eine erste und zweite Brennerzone auf, wobei die erste Brennerzone eine radial zur Längsachse des Brenners ausgerichtete Verbrennungszone umfasst. Innerhalb der ersten Brennerzone wird ein Gas-Luft-Gemisch einer zweiten Brennerzone zugeführt, die sowohl eine der ersten Brennerzone entsprechende radial ausgerichtete Verbrennungszone als auch eine weitere axial ausgerichtete Verbrennungszone umfasst, die gemeinsam die zweite Brennerzone bilden. Hierfür ist ein konstruktiv aufwändiger Aufbau vorgesehen.From the WO 2010/044931 A1 a gas burner is also known, which is used for heating water, which flows through a heat exchanger in a combustion chamber of the gas burner. This gas burner has a first and a second burner zone, the first burner zone comprising a combustion zone oriented radially to the longitudinal axis of the burner. Within the first burner zone, a gas-air mixture is fed to a second burner zone, which comprises both a radially oriented combustion zone corresponding to the first burner zone and a further axially oriented combustion zone, which together form the second burner zone. A structurally complex structure is provided for this.

Der Erfindung liegt die Aufgabe zugrunde, einen Brenner mit einem Oberflächensystem zu schaffen, welcher mehrzonig aufgebaut ist und einen geringen Bauraum zur Anordnung in einer Brennerplatte oder einem Brenner und eine effiziente Ansteuerung umfasst sowie einen Wärmeerzeuger zu schaffen, der kleinbauend ist, jedoch eine hohe Wärmeleistung ermöglicht.The invention has for its object to provide a burner with a surface system, which is constructed in several zones and includes a small space for arrangement in a burner plate or a burner and an efficient control, and to provide a heat generator that is small in size, but high heat output enables.

Diese Aufgabe wird durch einen Brenner nach Anspruch 1 gelöst, bei dem jede Brennerzone durch eine separate Zuführung mit einem Brennstoff-Luft-Gemisch versorgt wird und die Brennerzonen eine in gleicher Richtung ausgerichtete Flammenmatrix aufweisen. Dadurch können einerseits in der Einbautiefe flachbauende Brennerzonen geschaffen werden, so dass mehrere Brennerzonen nebeneinander angeordnet sein können, die andererseits durch die jeweilige separate Zuführung von Brennstoff-Luft-Gemischen entsprechend der gewünschten Betriebsart angesteuert werden können.This object is achieved by a burner according to claim 1, in which each burner zone is supplied with a fuel-air mixture by a separate feed and the burner zones have a flame matrix oriented in the same direction. On the one hand, this allows flat burner zones to be created in the installation depth, so that several burner zones can be arranged next to one another, which on the other hand can be controlled by the respective separate supply of fuel-air mixtures in accordance with the desired operating mode.

Die jeweiligen Gewebemembranen der Brennerzonen sind in einer gleichen Ebene zueinander angeordnet. Dadurch kann ein großflächiger Brenner in mehrere Brennerzonen mit verschiedenen oder auch gleichen Flächenanteilen unterteilt werden sowie eine getrennte Ansteuerung ermöglichen. Alternativ hierzu können die einzelnen Gewebemembranen der jeweils einander zugeordneten Brennerzonen parallel zueinander versetzt vorgesehen sein. Dies ist bevorzugt dann vorgesehen, um die einzelnen Brennerzonen in baulich kompakter Weise einander zuzuordnen.The respective tissue membranes of the burner zones are arranged in the same plane to one another. In this way, a large-area burner can be divided into several burner zones with different or the same area shares and enable separate control. As an alternative to this, the individual tissue membranes of the burner zones assigned to one another can be offset parallel to one another. This is then preferably provided in order to assign the individual burner zones to one another in a structurally compact manner.

Erfindungsgemäß ist für jede Brennerzone jeweils ein Gebläse zum Zuführen des Brennstoff-Luft-Gemischs vorgesehen, bzw. für die Brennerzonen ein gemeinsames Gebläse zum Zuführen des Brennstoff-Luft-Gemischs und in zumindest einer Zuführung zu den Brennerzonen eine Steuerklappe vorgesehen. Wenn für jede Brennerzone jeweils ein Gebläse zum Zuführen des Brennstoff-Luft-Gemischs vorgesehen ist, kann eine spezifische Ansteuerung und Zuführung des Brennstoff-Luft-Gemischs für jede Brennerzone erzielt werden, wodurch auch die Länge der Flammenwurzel bestimmbar ist. Wenn für alle Brennerzonen des Brenners ein gemeinsames Gebläse zum Zuführen des Brennstoff-Luft-Gemisches und in zumindest einer von wenigstens zwei zur jeweiligen Brennerzone führenden Zuführung eine Steuerklappe vorgesehen ist, können mehrere Brennerzonen mit nur einem gemeinsamen Gebläse angesteuert und durch Ansteuerung der Steuerklappe oder Steuerklappen mit dem Brennstoff-Luft-Gemisch versorgt werden.According to the invention, a fan for supplying the fuel-air mixture is provided for each burner zone, or a common fan for supplying the fuel-air mixture and a control flap is provided in at least one supply to the burner zones for the burner zones. If for each burner zone A fan for supplying the fuel-air mixture is provided, a specific control and supply of the fuel-air mixture can be achieved for each burner zone, whereby the length of the flame root can also be determined. If a common blower for supplying the fuel-air mixture and a control flap is provided for all burner zones of the burner and in at least one of at least two feeds leading to the respective burner zone, several burner zones can be controlled with only one common blower and by controlling the control flap or control flaps be supplied with the fuel-air mixture.

Bevorzugt ist die Flammenmatrix jeder Brennerzone axial zur Strömungsrichtung des Brennstoff-Luft-Gemischs zwischen der Flammenrückschlagsperre und der Gewebemembran ausgerichtet. Dadurch steht die Flammenmatrix senkrecht zur Oberfläche der Gewebemembran, so dass ein freies Austreten der Einzelflamme aus der Gewebemembran ohne eine Neigung oder Umlenkung ermöglicht ist, wodurch eine erhöhte Effizienz bei der Verbrennung und somit ein erhöhter Wirkungsgrad bei der Erwärmung des Brennerraums ermöglicht wird.The flame matrix of each burner zone is preferably aligned axially to the direction of flow of the fuel-air mixture between the flame non-return valve and the fabric membrane. As a result, the flame matrix is perpendicular to the surface of the fabric membrane, so that the individual flame can freely emerge from the fabric membrane without an inclination or deflection, which enables increased efficiency in combustion and thus increased efficiency in heating the burner chamber.

Die jeweilige Gewebemembran der einander zugeordneten Brennerzonen weist vorzugsweise bei deren Anordnung mit einem parallelen Versatz zueinander einen maximalen Versatz auf, der gleich oder kleiner als 100 mm ist. Dadurch kann eine homogene, sich über alle Gewebemembranen der Brennerzonen erstreckende gemeinsame Flammenmatrix erzielt werden.The respective tissue membrane of the burner zones assigned to one another preferably has a maximum offset which is equal to or less than 100 mm when they are arranged with a parallel offset to one another. A homogeneous flame matrix extending over all tissue membranes of the burner zones can thereby be achieved.

Die Länge der Flammenwurzel der jeweiligen Flammenmatrix ist vorzugsweise bei Volllast am längsten.The length of the flame root of the respective flame matrix is preferably the longest at full load.

Gemäß einer bevorzugten Ausführungsform sind der ersten zu zündenden Brennerzone zumindest eine Zündelektrode und/oder zumindest eine Überwachungselektrode zugeordnet. Beispielsweise kann die erste Brennerzone als Vorstufe ausgebildet sein, welche zunächst gezündet und überwacht wird, um in der Verbrennungszone eine Flammenmatrix auszubilden. Aufgrund der benachbart dazu angeordneten zweiten und/oder weiteren Brennerzone kann in Abhängigkeit der Zuführung des Brennstoff-Luft-Gemisches diese zweite oder weitere Brennerzone zugeschalten werden, wobei die Flammenmatrix der ersten Brennerzone beim Zuführen von dem Brennstoff-Luft-Gasgemisch zu einer zweiten und/oder weiteren benachbarten Brennerzone überschlägt und mit dieser eine gemeinsame Flammenmatrix bildet.According to a preferred embodiment, the first burner zone to be ignited is at least one ignition electrode and / or at least one Monitoring electrode assigned. For example, the first burner zone can be designed as a preliminary stage, which is first ignited and monitored in order to form a flame matrix in the combustion zone. On account of the second and / or further burner zone arranged adjacent to this, depending on the supply of the fuel-air mixture, this second or further burner zone can be switched on, the flame matrix of the first burner zone being supplied to the second and / or the fuel-air-gas mixture. or another neighboring burner zone, and forms a common flame matrix with it.

Gemäß einer ersten Ausführungsform der Verbrennungszone des Brenners ist eine erste Brennerzone vollständig von der zweiten und/oder zumindest einen weiteren Brennerzone umgeben. Diese Anordnung kann auch vertauscht sein. Dadurch können beispielsweise zwei konzentrisch zueinander angeordnete Brennerzonen ausgebildet werden, die zumeist derart angesteuert werden, dass die kleinere der beiden Zonen zunächst gezündet wird.According to a first embodiment of the combustion zone of the burner, a first burner zone is completely surrounded by the second and / or at least one further burner zone. This arrangement can also be interchanged. As a result, for example, two burner zones arranged concentrically to one another can be formed, which are usually controlled in such a way that the smaller of the two zones is initially ignited.

Eine weitere alternative Ausführungsform der Verbrennungszone des Brenners sieht vor, dass die erste und zumindest eine weitere Brennerzone jeweils denselben Flächenanteil aufweisen. Alternativ kann auch die erste Brennerzone in der Fläche abweichend zur zweiten oder weiteren Brennerzone ausgebildet sein, wobei bevorzugt bei zwei Brennerzonen die erste Brennerzone kleiner als die zweite Brennerzone ist. Je nach Gesamtregelverhältnis von beispielsweise der ersten und zweiten Brennerstufe wird das Größenverhältnis der jeweiligen Brennerzone festgelegt. Dies ist vom zu befeuernden Wärmeerzeuger und dem nachgeschalteten Wärmeprozess abhängig. Das Gesamtregelverhältnis kann bestimmt werden aus der Summe der maximalen Leistung der ersten und zweiten Brennerzone im Verhältnis zur minimalen Leistung der ersten Brennerzone. Analoges gilt für mehr als zwei Brennerzonen.Another alternative embodiment of the combustion zone of the burner provides that the first and at least one further burner zone each have the same proportion of area. Alternatively, the surface of the first burner zone may be different from that of the second or further burner zone, the first burner zone preferably being smaller than the second burner zone in the case of two burner zones. Depending on the overall control ratio of, for example, the first and second burner stages, the size ratio of the respective burner zone is determined. This depends on the heat generator to be fired and the downstream heating process. The overall control ratio can be determined from the sum of the maximum output of the first and second burner zones in relation to the minimum output of the first burner zone. The same applies to more than two burner zones.

Eine weitere bevorzugte Ausführungsform der Erfindung sieht zwischen der ersten und zumindest einen weiteren Brennerzone eine gemeinsame Berührungslinie oder einen gemeinsamen Berührpunkt der jeweiligen Flammenmatrix vor. Die Flammen der Flammenmatrix weiten sich bis zum Ende der jeweiligen Flamme in Strömungsrichtung des Brennstoff-Luft-Gemisches gesehen auf, so dass auch im Randbereich der Verbrennungszone ein Aufweiten der Flammenmatrix gegeben ist, wodurch ein vereinfachtes Zünden der benachbarten Verbrennungszone einer weiteren Brennerzone ermöglicht wird.Another preferred embodiment of the invention sees a common one between the first and at least one further burner zone Contact line or a common point of contact of the respective flame matrix. The flames of the flame matrix expand up to the end of the respective flame in the direction of flow of the fuel-air mixture, so that the flame matrix also widens in the edge region of the combustion zone, thereby making it easier to ignite the adjacent combustion zone of a further burner zone.

Die erste und zumindest eine weitere Brennerzone weisen bevorzugt eine kreisrunde, rechteckige oder quadratische Geometrie zur Bildung einer Verbrennungszone auf. Dadurch kann eine Anpassung an die Einbauverhältnisse ermöglicht werden. Beispielsweise kann eine kreisrunde oder quadratische Geometrie für einen zylindrischen Brennerraum vorgesehen sein. Des Weiteren kann ein länglich-rechteckförmiger Brenner mit einer ersten und zweiten Brennerzone für streifenförmige und sich länglich erstreckende Erhitzungszonen ausgebildet sein und eingesetzt werden.The first and at least one further burner zone preferably have a circular, rectangular or square geometry to form a combustion zone. This enables adaptation to the installation conditions. For example, a circular or square geometry can be provided for a cylindrical burner chamber. Furthermore, an oblong-rectangular burner with a first and second burner zone for strip-shaped and elongated heating zones can be formed and used.

Des Weiteren weist bevorzugt die zweite oder weitere Brennerzone den zwei- bis siebenfachen Flächenanteil der ersten Brennerzone auf. Dadurch bildet die erste Brennerzone eine Vorstufe und die zweite Brennerzone beispielsweise eine Hauptstufe, vorzugsweise gemeinsam mit der Vorstufe, für die Beheizung des Brennraumes.Furthermore, the second or further burner zone preferably has two to seven times the surface area of the first burner zone. As a result, the first burner zone forms a preliminary stage and the second burner zone, for example, a main stage, preferably together with the preliminary stage, for heating the combustion chamber.

Eine weitere bevorzugte Ausgestaltung der Erfindung sieht vor, dass das Brennstoff-Luft-Gemisch vor dem zumindest einen Gebläse gemischt und über das Gebläse das Gemisch der zumindest einen Brennerzone zugeführt wird. Dabei spricht man von einem sogenannten Premix-Brenner. Alternativ kann nach dem zumindest einen Gebläse das Brennstoff-Luft-Gemisch gemischt und dann der zumindest einen Brennerzone zugeführt werden. Bei einer solchen Ausführungsform wird von einem Postmix-Brenner gesprochen.A further preferred embodiment of the invention provides that the fuel-air mixture is mixed in front of the at least one fan and the mixture is fed to the at least one burner zone via the fan. One speaks of a so-called premix burner. Alternatively, the fuel / air mixture can be mixed after the at least one blower and then fed to the at least one burner zone. In such an embodiment, the term postmix burner is used.

Eine bevorzugte Ausführungsform des Brenners mit der ersten und zumindest einer weiteren Brennerzone sieht vor, dass diese in einem gemeinsamen Brennerkopf angeordnet sind, so dass die erste und zumindest eine weitere Brennerzone gemeinsam an einer Brennerplatte zum Brennerraum angeordnet sind, welche an einem Brennergehäuse zum Schließen des Brennerraumes befestigbar ist.A preferred embodiment of the burner with the first and at least one further burner zone provides that these are arranged in a common burner head, so that the first and at least one further burner zone together on one burner plate are arranged to the burner chamber, which can be fastened to a burner housing for closing the burner chamber.

Alternativ zu dieser Ausführungsform können die erste und zumindest eine weitere Brennerzone jeweils durch einen separaten Brennkopf mit jeweiligem Gehäuse ausgebildet sein, die benachbart oder aneinander angrenzend in einer Brennerplatte angeordnet sind.As an alternative to this embodiment, the first and at least one further burner zone can each be formed by a separate burner head with a respective housing, which are arranged adjacent or adjacent to one another in a burner plate.

Die der Erfindung zugrunde liegende Aufgabe wird des Weiteren durch einen Wärmeerzeuger gelöst, bei welchem ein Brenner nach einer der vorbeschriebenen Ausführungsformen einsetzbar ist. Bevorzugt kann der Wärmeerzeuger zur Aufheizung eines flüssigen, dampfförmigen oder gasförmigen Mediums vorgesehen sein, bei welchem vorzugsweise eine Versorgungsleitung in einen Brennerraum des Gehäuses des Wärmeerzeugers führt, um das durch die Leitung durchströmende Medium zu erhitzen. Im Besonderen ist die Leitung ein Teil eines Wärmetauschers, um beispielsweise Wasser zu erhitzen. Ein solcher Wärmeerzeuger mit einem Brenner ermöglicht eine kleinbauende Anordnung bei einer hohen Wärmeleistung.The object on which the invention is based is also achieved by a heat generator in which a burner according to one of the above-described embodiments can be used. The heat generator can preferably be provided for heating a liquid, vaporous or gaseous medium, in which a supply line preferably leads into a burner chamber of the housing of the heat generator in order to heat the medium flowing through the line. In particular, the line is part of a heat exchanger, for example to heat water. Such a heat generator with a burner enables a small-sized arrangement with a high heat output.

Die Erfindung sowie weitere vorteilhafte Ausführungsformen und Weiterbildungen derselben werden im Folgenden anhand der in den Zeichnungen dargestellten Beispiele näher beschrieben und erläutert. Die der Beschreibung und den Zeichnungen zu entnehmenden Merkmale können einzeln für sich oder zu mehreren in beliebiger Kombination erfindungsgemäß angewandt werden. Es zeigen:

  • Figur 1 eine schematische Schnittansicht eines Brenners mit einer ersten und zweiten Brennerzone,
  • Figur 2 eine schematisch vergrößerte Ansicht eines Brennerkopfes des Brenners gemäß Figur 1 in einer Schnittdarstellung,
  • Figur 3 eine schematische Seitenansicht des Brennkopfes gemäß Figur 2,
  • Figur 4 eine schematische Ansicht einer ersten und zweiten zueinander versetzt angeordneten Brennerzone gemäß Figur 2,
  • Figuren 5a und 5b schematische Ansichten von alternativen Ausführungsformen zur Ansteuerung des Brennkopfes gemäß Figur 2,
  • Figuren 6a bis 6e schematische Ansichten von alternativen Ausführungsformen mehrstufiger Brennköpfe,
  • Figur 7 eine schematische Schnittansicht einer alternativen Ausführungsform der ersten und zweiten Brennerzone zu Figur 1 und
  • Figur 8 eine schematische Ansicht auf die Brennerzonen gemäß Figur 7.
The invention and further advantageous embodiments and developments thereof are described and explained in more detail below with reference to the examples shown in the drawings. The features that can be gathered from the description and the drawings can be used according to the invention individually or in groups in any combination. Show it:
  • Figure 1 1 shows a schematic sectional view of a burner with a first and second burner zone,
  • Figure 2 a schematic enlarged view of a burner head of the burner according to Figure 1 in a sectional view,
  • Figure 3 is a schematic side view of the burner head Figure 2 ,
  • Figure 4 a schematic view of a first and second burner zone arranged offset to one another according to Figure 2 ,
  • Figures 5a and 5b schematic views of alternative embodiments for controlling the burner head according to Figure 2 ,
  • Figures 6a to 6e schematic views of alternatives Embodiments of multi-stage burn heads,
  • Figure 7 is a schematic sectional view of an alternative embodiment of the first and second burner zone Figure 1 and
  • Figure 8 a schematic view of the burner zones according Figure 7 .

In Figur 1 ist eine schematische Schnittdarstellung eines Brenners 13 an einem Wärmeerzeuger 11 mit einem Brennerraum 12 dargestellt, in den ein Wärmetauscher beziehungsweise eine flüssiges Medium führende Leitung 14 ragt, um das durch die Leitung 14 hindurch geführte flüssige Medium aufzuheizen und die Wärmeenergie der Flamme abzuführen. Das Wärmeträgermedium kann auch dampf- oder gasförmig sein. Der Wärmeerzeuger 11 umfasst ein Gehäuse 16, welches an einem stirnseitigen Ende eine Öffnung 17 mit einer Rohrleitung 18 zum Abführen von heißen Verbrennungsgasen aufweist. Gegenüber liegend ist der Brennerraum 12 durch eine Brennerplatte 21 geschlossen, welche einen Brenner 13 mit einem Brennerkopf 23 mit einem Gebläse 24 aufnimmt. Ein solcher Brenner 13 kann gemäß EN676 "Gasgebläsebrenner" als Gasgerät betrieben werden. Ebenso ist ein Betrieb gemäß EN746-2 an Thermoprozessanlagen im Bereich der Industrie und Gewerbe möglich. Eine Abgrenzung der jeweiligen Einsatzbereiche ist in den zugehörigen Normen unter "Anwendungsbereich" beschrieben.In Figure 1 is a schematic sectional view of a burner 13 is shown on a heat generator 11 with a burner chamber 12 into which a heat exchanger or a line 14 carrying liquid medium projects in order to heat up the liquid medium passed through line 14 and to dissipate the thermal energy of the flame. The heat transfer medium can also be vapor or gaseous. The heat generator 11 comprises a housing 16 which has an opening 17 with a pipeline 18 at one end for discharging hot combustion gases. Opposite the burner chamber 12 is closed by a burner plate 21 which receives a burner 13 with a burner head 23 with a fan 24. Such a burner 13 can be operated as a gas appliance in accordance with EN676 "gas blower burner". Operation in accordance with EN746-2 on thermoprocessing systems in the industrial and commercial sector is also possible. A delimitation of the respective areas of application is described in the associated standards under "Area of application".

Gemäß einer ersten Ausführungsform wird über eine Luftzuführleitung 26 Luft dem Gebläse 24 zugeführt. Des Weiteren führt eine Brennstoffleitung 27 zum Gebläse 24, wobei über ein Magnetventil 28 eine bestimmte Menge an Brennstoff dem Gebläse 24 zugeführt wird. Dieses Gebläse 24 weist bevorzugt ein nicht näher dargestelltes Ventilatorrad auf, so dass nach dem Gebläse 24 ein Brennstoff-Luft-Gemisch erzeugt und über eine Zuführung 29 dem Brennerkopf 23 zugeführt wird. Alternativ kann auch bereits ein Brennstoff-Luft-Gemisch dem Gebläse 24 zugeführt werden.According to a first embodiment, air is supplied to the blower 24 via an air supply line 26. Furthermore, a fuel line 27 leads to the blower 24, a certain amount of fuel being supplied to the blower 24 via a solenoid valve 28. This fan 24 preferably has a fan wheel, not shown in detail, so that a fuel-air mixture is generated after the fan 24 and is fed to the burner head 23 via a feed 29. Alternatively, a fuel-air mixture can also be supplied to the blower 24.

Die Ansteuerung des Magnetventils 28 zur Bestimmung der Menge an zugeführtem Brennstoff erfolgt über eine Steuerungseinrichtung 40, welche die Ansteuerung des gesamten Verbrennungsprozesses überwachen und steuern kann. Der Brennerkopf 23 umfasst des Weiteren zumindest eine Zündelektrode 31 und zumindest eine Überwachungselektrode 32, welche in Figur 1 nur schematisch dargestellt und ebenfalls mit der Steuerungseinrichtung 40 verbunden sind, um Daten an die Steuerungseinrichtung 40 weiterzuleiten beziehungsweise die Zündelektrode 31 zur Zündung des Brennerkopfes 24 anzusteuern.The control of the solenoid valve 28 for determining the amount of fuel supplied takes place via a control device 40, which can monitor and control the control of the entire combustion process. The burner head 23 further comprises at least one ignition electrode 31 and at least one Monitoring electrode 32, which in Figure 1 are only shown schematically and are also connected to the control device 40 in order to forward data to the control device 40 or to control the ignition electrode 31 to ignite the burner head 24.

Der Brennerkopf 23 gemäß Figur 1 ist beispielhaft zweistufig aufgebaut und umfasst eine erste Brennerzone 34 und eine zweite Brennerzone 35. Jede dieser Brennerzonen 34, 35 kann für sich individuell stufenlos von kleinster bis größter Leistung geregelt werden. Die zweite Brennerzone 35 ist beispielsweise durch eine von dem Gehäuse 36 der ersten Brennerzone 34 abführende Zuführung 37 mit der zweiten Brennerzone 35 verbunden. Die Zuführung 37 kann auch von der vom Gebläse 24 kommenden Zuführung 29 abzweigen. Die Zuführung 37 umfasst eine Steuerklappe 38, welche wiederum mit der Steuerungseinrichtung 40 in Verbindung steht und darüber ansteuerbar ist.The burner head 23 according to Figure 1 is constructed, for example, in two stages and comprises a first burner zone 34 and a second burner zone 35. Each of these burner zones 34, 35 can be individually and continuously regulated from the lowest to the highest output. The second burner zone 35 is connected to the second burner zone 35, for example, by a feed 37 leading away from the housing 36 of the first burner zone 34. The feed 37 can also branch off from the feed 29 coming from the blower 24. The feed 37 comprises a control flap 38, which in turn is connected to the control device 40 and can be controlled via it.

Der Aufbau dieses mehrzonigen Brennerkopfes 23 des Brenners 11 wird detaillierter in den nachfolgenden Figuren 2 und 3 beschrieben.The structure of this multi-zone burner head 23 of the burner 11 is detailed in the following Figures 2 and 3rd described.

Der Brennerkopf 23 umfasst gemäß dem Ausführungsbeispiel ein zylindrisches Gehäuse 36 mit einem Boden 41, an welchem die Zuführung 29 angeschlossen ist, durch welchen das Brennstoff-Luft-Gemisch über das Gebläse 24 der ersten Brennerzone 34 zugeführt wird. Innerhalb des Gehäuses 34 ist zur Bildung der ersten und zweiten Brennerzone 34, 35 eine Gehäusetrennwand 43 angeordnet, welche zusammen mit dem dazugehörigen Abschnitt des Bodens 41 ein Gehäuse 44 für die erste Brennerzone 34 bildet. Ein Gehäuse 45 für die zweite Brennerzone 35 wird durch die Gehäusetrennwand 43 des Gehäuses 44 und eine Außenwand 46 des Gehäuses 34 des Brennerkopfes 23 gebildet. In diese Außenwand 46 mündet die Zuführung 37 zur Zuführung des Brennstoff-Luft-Gemisches. Alternativ kann diese Zuführung auch am Boden 41 des Gehäuses 45 angeschlossen sein. Alternativ kann die Zuführung 37 auch am Boden 41 des Gehäuses 45 angeordnet sein. Das Gehäuse 44 der ersten Brennerzone 34 und das Gehäuse 45 der zweiten Brennerzone 35 sind ineinander geschachtelt und miteinander kombiniert, so dass das zweite Gehäuse 45 konzentrisch das Gehäuse 44 umgibt. Bevorzugt ist ein gemeinsamer Boden 41 für das Gehäuse 44, 45 vorgesehen. Alternativ können die Böden der Gehäuse 44, 45 versetzt zueinander angeordnet sein.According to the exemplary embodiment, the burner head 23 comprises a cylindrical housing 36 with a bottom 41, to which the feed 29 is connected, through which the fuel-air mixture is fed to the first burner zone 34 via the fan 24. A housing partition 43 is arranged within the housing 34 to form the first and second burner zones 34, 35, which together with the associated section of the base 41 forms a housing 44 for the first burner zone 34. A housing 45 for the second burner zone 35 is formed by the housing partition 43 of the housing 44 and an outer wall 46 of the housing 34 of the burner head 23. The supply 37 for supplying the fuel-air mixture opens into this outer wall 46. Alternatively, this feed can also be connected to the bottom 41 of the housing 45. Alternatively, the feed 37 can also be arranged on the bottom 41 of the housing 45. The housing 44 of the first burner zone 34 and the housing 45 of the second burner zone 35 are nested and combined with one another, so that the second housing 45 concentrically surrounds the housing 44. A common base 41 is preferably provided for the housing 44, 45. Alternatively, the bottoms of the housings 44, 45 can be arranged offset to one another.

Die erste Brennerzone 34 umfasst dem Boden 41 gegenüber liegend und in Strömungsrichtung des Brennstoff-Luft-Gemisches gesehen eine Flammenrückschlagsperre 48 sowie dazu beabstandet und stromab eine Gewebemembran 49. Die Gewebemembran 49 kann zur Flammenrückschlagsperre 48 durch Distanzelemente oder einen Wandabschnitt oder dergleichen beabstandet sein. Stromab zur Gewebemembran 49 ist eine Verbrennungszone 51 vorgesehen, innerhalb der sich eine Flammenmatrix 52 ausbildet, wobei die Verbrennungszone 51 in radialer Richtung durch ein Begrenzungselement 54 begrenzt ist.The first burner zone 34 comprises a flame non-return valve 48 lying opposite the floor 41 and viewed in the direction of flow of the fuel-air mixture, as well as spaced apart therefrom and a fabric membrane 49 downstream. Downstream of the tissue membrane 49, a combustion zone 51 is provided, within which a flame matrix 52 is formed, the combustion zone 51 being delimited in the radial direction by a delimiting element 54.

Die erste Brennerzone 34 umfasst beispielsweise eine Zündelektrode 31 sowie eine oder mehrere Überwachungselektroden 32, die beispielsweise mittig zur ersten Brennerzone 34 beziehungsweise im Gehäuse 44 der ersten Brennerzone angeordnet sind. Aufgrund dieser zentralen Anordnung der Zündelektrode 31 und Überwachungselektrode 32 ist die Zuführung 29 des Brennstoff-Luft-Gemischs am Gehäuse 44 durch einen gabelförmigen Anschluss 56 ausgebildet, der beispielsweise drei Öffnungen 57 im Boden 41 überdeckt. Die zumindest eine Zündelektrode 31 und/oder Überwachungselektrode 32 kann auch in einem Randbereich im Gehäuse 44 der ersten Brennerzone 34 angeordnet sein, so dass eine zentrale oder im übrigen Bereich im Boden 41 angeordnete Zuführung des Brennstoff-Luft-Gemischs möglich ist.The first burner zone 34 comprises, for example, an ignition electrode 31 and one or more monitoring electrodes 32, which are arranged, for example, in the center of the first burner zone 34 or in the housing 44 of the first burner zone. Because of this central arrangement of the ignition electrode 31 and the monitoring electrode 32, the feed 29 of the fuel-air mixture is formed on the housing 44 by a fork-shaped connection 56, which for example covers three openings 57 in the base 41. The at least one ignition electrode 31 and / or monitoring electrode 32 can also be arranged in an edge region in the housing 44 of the first burner zone 34, so that a central supply of the fuel-air mixture or in the rest of the region 41 is possible.

Die zweite Brennerzone 35 umfasst ebenfalls in Strömungsrichtung gesehen eine Flammenrückschlagsperre 48 und dazu beabstandet eine Gewebemembran 49, um eine ringförmige Verbrennungszone 51 zu bilden. Vorzugsweise sind ebenfalls wieder Begrenzungselemente 54 im Gehäuse 45 vorgesehen.The second burner zone 35 also comprises a flame non-return valve 48, viewed in the direction of flow, and a tissue membrane 49 at a distance therefrom to form an annular combustion zone 51. Limiting elements 54 are preferably again provided in the housing 45.

Das Begrenzungselement 54 ist zum einen derart ausgestaltet, um die Gewebemembran 49 zum Distanzelement nieder zu halten, welches die Gewebemembran 49 in einem vorbestimmten Abstand zur Flammenrückschlagsperre 48 positioniert. Zum anderen ist das Begrenzungselement 54 derart ausgebildet, dass ausgehend vom Betrieb des Brennerkopfes 23 mit der ersten Brennerzone 34 durch einen Zuschalter der zweiten Brennerzone 35 ein Zünden der Flammenmatrix 52 der zweiten Brennerzone 35 aufgrund der Flammenmatrix 52 in der ersten Brennerzone 34 ermöglicht ist. Die aus der Gewebemembran 49 austretenden Einzelflammen 59 expandieren am Ende der Einzelflammen in Strömungsrichtung gesehen, so dass ein Aufweiten der Flammenmatrix 52 im Randbereich der Brennerzone 34 gegeben ist und bei Zuführung des Brennstoff-Luft-Gemisches über die benachbarte Brennerzone 35 eine automatische Zündung der Brennerzone 51 der benachbarten Brennerzone erfolgt.On the one hand, the limiting element 54 is designed in such a way that the tissue membrane 49 is held down to the spacer element, which positions the tissue membrane 49 at a predetermined distance from the flame flashback barrier 48. Second, it is Limiting element 54 is designed such that, starting from the operation of the burner head 23 with the first burner zone 34, a switch-on of the second burner zone 35 enables the flame matrix 52 of the second burner zone 35 to be ignited due to the flame matrix 52 in the first burner zone 34. The individual flames 59 emerging from the fabric membrane 49 expand at the end of the individual flames as seen in the direction of flow, so that the flame matrix 52 widens in the edge region of the burner zone 34 and, when the fuel-air mixture is supplied via the adjacent burner zone 35, the burner zone 35 is ignited automatically 51 of the neighboring burner zone.

Die Anordnung und Ausgestaltung des Brennerkopfes 23 mit einer zur Flammenrückschlagsperre 49 beabstandeten Gewebemembran 49 ermöglicht die Bildung einer kühlen Flammenwurzel, insbesondere beim Einsatz einer Gewebemembran 49 gemäß der WO 2012/065582 , auf die vollumfänglich Bezug genommen wird.The arrangement and configuration of the burner head 23 with a fabric membrane 49 spaced apart from the flame check valve 49 enables the formation of a cool flame root, in particular when using a fabric membrane 49 according to FIG WO 2012/065582 to which full reference is made.

In Figur 4 ist schematisch die Anordnung der Gewebemembran 49 der ersten Brennerzone 34 und der zweiten Brennerzone 35 gemäß Figur 2 dargestellt, wobei diese mit einem parallelen Versatz a zueinander ausgerichtet sind.In Figure 4 is schematically the arrangement of the fabric membrane 49 of the first burner zone 34 and the second burner zone 35 according to Figure 2 shown, which are aligned with a parallel offset a to each other.

An jeder Gewebemembran 49 wird im Bereich der Verbrennungszone 51 eine Flammenmatrix 52 ausgebildet, welche sich aus Einzelflammen 59 sowie dazwischen angeordneten Halteflammen 60 zusammensetzt, wobei die Einzelflammen 59 gegenüber den Halteflammen 60 hervortreten. Der parallele Versatz zwischen der Gewebemembran 49 der ersten Brennerzone 44 zur Gewebemembran 49 der zweiten Brennerzone 45 entspricht maximal der Flammenwurzel der Einzelflamme 59. Der maximale Versatz a gilt auch für weitere Gewebemembranen 49, die in weiteren Brennerzonen bei mehrzonigen Brennern 11 vorgesehen sind.A flame matrix 52 is formed on each tissue membrane 49 in the area of the combustion zone 51, which flame matrix is composed of individual flames 59 and holding flames 60 arranged between them, the individual flames 59 emerging from the holding flames 60. The parallel offset between the fabric membrane 49 of the first burner zone 44 to the fabric membrane 49 of the second burner zone 45 corresponds at most to the flame root of the individual flame 59. The maximum offset a also applies to other fabric membranes 49 which are provided in further burner zones in multi-zone burners 11.

Unter "Flammenwurzel" wird eine Zone der Einzelflammen 59 verstanden, welche diese Einzelflamme 59 stabilisiert hält, so dass diese sich nicht von der Gewebemembran 49 abhebt oder erlöschen kann. In der Flammenwurzel ist der Brennstoff und Sauerstoff nur teilweise gezündet und liegt teilweise noch getrennt vor. Erst am Ende der Flammenwurzel in Strömungsrichtung des Brennstoff-Luft-Gemisches gesehen wird die exotherme Reaktion vollständig gestartet, die dann im Ausbrand der Flammen vollständig abgeschlossen wird. Folglich ist in der Flammenwurzel die Zündung der Verbrennungsreaktion - also die Oxidation eines brennbaren Materials mit Sauerstoff, wodurch die Flammenbildung erfolgt - noch nicht abgeschlossen. Unverbrannte Bestandteile an Sauerstoff und brennbarem Material können immer noch vorhanden sein. Die Flammenwurzel kann bei einem vorgemischten, stöchiometrischen Brennstoff-Luft-Gemisch als Flamme optisch an ihrer blauen Kernfarbe erkannt werden, die intensiver sichtbar ist als der Rest der Flamme.“Flame root” is understood to mean a zone of the individual flames 59 which keeps this individual flame 59 stabilized, so that it does not stand out from the tissue membrane 49 or can go out. The fuel and oxygen are only partially ignited in the flame root and is partly still separate. Only at the end of the flame root in the flow direction of the fuel-air mixture is the exothermic reaction started completely, which is then completed when the flames burn out. Consequently, the ignition of the combustion reaction in the flame root - i.e. the oxidation of a combustible material with oxygen, which causes the flame to form - has not yet been completed. Unburned constituents of oxygen and combustible material can still be present. In the case of a premixed, stoichiometric fuel-air mixture, the flame root can be identified optically as a flame by its blue core color, which is more intensely visible than the rest of the flame.

Bei der in Figur 4 dargestellten schematischen Anordnung kann der Versatz a auch gleich null sein, das heißt, dass die Gewebemembran 49 der ersten Brennerzone 34 und die der zweiten Brennerzone 35 in einer gleichen Ebene angeordnet sind.At the in Figure 4 In the schematic arrangement shown, the offset a can also be zero, that is to say that the fabric membrane 49 of the first burner zone 34 and that of the second burner zone 35 are arranged in the same plane.

In den Figuren 5a und 5b sind schematische Ansichten darstellt, welche eine alternative Ausführungsform bezüglich der Zuführung des Brennstoff-Luft-Gemisches zum Brennerkopf 23 des Brenners 11 zu den Figuren 1 bis 3 zeigen. Die Figur 5a weicht von der Zuführung des Brennstoff-Luft-Gemisches von Figur 1 dahingehend ab, dass in der Zuführleitung 29 eine Abzweigung 62 vorgesehen ist, welche den durch das Gebläse 16 zugeführten Volumenstrom zweiteilt, so dass jeweils eine getrennte Zuführung für die erste und zweite Brennstoffstufe 34, 35 vorgesehen ist. Jede Zuführung 29, 37 umfasst eine separate Steuerklappe 38, welche jeweils getrennt voneinander von der Steuerungseinrichtung 40 ansteuerbar sind, um den jeweiligen Volumenstrom zu regeln.In the Figures 5a and 5b 14 are schematic views illustrating an alternative embodiment with respect to the supply of the fuel-air mixture to the burner head 23 of the burner 11 Figures 1 to 3 demonstrate. The Figure 5a differs from the supply of the fuel-air mixture Figure 1 in that a branch 62 is provided in the feed line 29, which divides the volume flow supplied by the blower 16 in two, so that a separate feed is provided for the first and second fuel stages 34, 35. Each feed 29, 37 comprises a separate control flap 38, which can be controlled separately from each other by the control device 40 in order to regulate the respective volume flow.

Figur 5b zeigt eine Zuführung für ein Brennstoff-Luft-Gemisch zum Brennerkopf 23, bei welchem jede Brennerzone 34, 35 jeweils mit einer Zuführleitung 29, 37 verbunden ist, an die jeweils ein Gebläse 24 angeschlossen ist, so dass jede Brennerzone 34, 35 unabhängig von der anderen Brennerzone 35, 34 mit einem Brennstoff-Luft-Gemisch befüllbar ist, so dass die Gemische auch voneinander abweichen können. Figure 5b shows a feed for a fuel-air mixture to the burner head 23, in which each burner zone 34, 35 is each connected to a feed line 29, 37 to which a fan 24 is connected, so that each burner zone 34, 35 is independent of the other burner zone 35, 34 can be filled with a fuel-air mixture is so that the mixtures can also differ from each other.

In den Figuren 6a bis 6e sind schematische Ansichten von oben auf einen Brenner 11 mit beispielsweise zwei Brennerzonen 34, 35 dargestellt, welche verschiedene Anordnungen und Geometrien aufweisen. Es versteht sich, dass anstelle von zwei Brennerzonen auch mehrere Brennerzonen vorgesehen sein können, die einen analogen Aufbau aufweisen.In the Figures 6a to 6e are schematic views from above of a burner 11 with, for example, two burner zones 34, 35, which have different arrangements and geometries. It goes without saying that instead of two burner zones, it is also possible to provide a plurality of burner zones which have an analog structure.

Figur 6a stellt eine Stirnansicht des Brennerkopfes 23 gemäß Figur 2 mit einer runden Verbrennungszone 51 dar, wobei die Figur 6a dahingehend abweichend ist, dass die zumindest eine Zündelektrode 31 und/oder Überwachungselektrode 32 nicht mittig, sondern außermittig in der Gewebemembran 49 der ersten Brennerzone 34 angeordnet ist. Bevorzugt umfasst die zweite Brennerzone 35 ein Vielfaches der ersten Brennerzone 34 bezüglich deren Flächen. Die zweite Brennerzone 35 umgibt vollständig die erste Brennerzone 34. Diese weisen eine gemeinsame Berührungslinie 64 der jeweiligen Flammenmatrix 52 auf. Entlang dieser Berührungslinie 64 erfolgt ein Überspringen der Flammenmatrix 52 der ersten Brennerzone 34 auf die zweite Brennerzone 35 beim Zuschalten der zweiten Brennerzone 35. Bei mehrzonigen Brennern kann eine dritte Brennerzone die zweite Brennerzone vollständig oder die zweite und dritte Brennerzone gemeinsam die erste Brennerzone umgeben. Alternativ kann auch die erste Brennerzone zwei- oder mehrzonig ausgebildet sein und von einer ringförmigen Brennerzone in Analogie der dargestellten zweistufigen Brennerzone umgeben sein. Figure 6a represents an end view of the burner head 23 according to Figure 2 with a round combustion zone 51, the Figure 6a It differs in that the at least one ignition electrode 31 and / or monitoring electrode 32 is not arranged in the center, but rather off-center in the tissue membrane 49 of the first burner zone 34. The second burner zone 35 preferably comprises a multiple of the first burner zone 34 with respect to the areas thereof. The second burner zone 35 completely surrounds the first burner zone 34. These have a common line of contact 64 of the respective flame matrix 52. Along this line of contact 64, the flame matrix 52 of the first burner zone 34 is skipped onto the second burner zone 35 when the second burner zone 35 is switched on. In the case of multi-zone burners, a third burner zone can completely surround the second burner zone or the second and third burner zones together surround the first burner zone. Alternatively, the first burner zone can also have two or more zones and be surrounded by an annular burner zone in analogy to the two-stage burner zone shown.

In Figur 6b ist eine alternative Ausführungsform zu Figur 6a dargestellt. Bei dieser Ausführungsform weisen die erste und zweite Brennerzone 34, 35 gleich große Flächen auf, die durch die Berührungslinie 64 getrennt sind, in denen jeweils eine Verbrennungszone 51 mit einem Halbkreis für die erste und zweite Brennerzone 34, 35 gebildet ist. Alternativ kann hier auch die erste Brennerzone 34 der Verbrennungszone 51 ein Kreisbogensegment umfassen und die zweite Brennerzone 35 die restliche Fläche einnehmenIn Figure 6b is an alternative embodiment to Figure 6a shown. In this embodiment, the first and second burner zones 34, 35 have areas of equal size, which are separated by the contact line 64, in each of which a combustion zone 51 is formed with a semicircle for the first and second burner zones 34, 35. As an alternative, the first burner zone 34 of the combustion zone 51 can also comprise an arc segment and the second burner zone 35 take up the remaining area

Die Figur 6c zeigt eine alternative geometrische Ausgestaltung der Verbrennungszone 51 zu Figur 6b, indem die erste und zweite Brennerzone 34, 35 quadratisch, jedoch mit gleicher Flächenteilung, ausgebildet ist. Alternativ kann bei Figur 6c auch eine rechteckförmige Anordnung vorgesehen sein.The Figure 6c shows an alternative geometric configuration of the Combustion zone 51 too Figure 6b , by the first and second burner zones 34, 35 being square, but with the same surface division. Alternatively, at Figure 6c a rectangular arrangement may also be provided.

Im Hinblick auf eine gleiche Flächenaufteilung zwischen der ersten und zweiten Brennerzone 34, 35 kann gemäß Figur 6d auch eine Teilung bezüglich einer quadratischen Verbrennungszone 51 über eine diagonale Berührungslinie 64 erfolgen.With regard to an equal division of area between the first and second burner zones 34, 35 can according to Figure 6d there is also a division with respect to a square combustion zone 51 via a diagonal line of contact 64.

Die Figur 6e zeigt eine weitere alternative Ausgestaltung, welche eine flach-rechteckförmige Verbrennungszone 51 der ersten und zweiten Brennerzone 34, 35 umfasst, die eine gemeinsame Berührungslinie 64 umfassen. Eine solche Ausführungsform ist bevorzugt bei sogenannten Leistenbrennern vorgesehen, deren Länge ein Vielfaches gegenüber der Breite umfasst.The Figure 6e shows a further alternative embodiment, which comprises a flat-rectangular combustion zone 51 of the first and second burner zones 34, 35, which comprise a common contact line 64. Such an embodiment is preferably provided in so-called strip burners, the length of which is a multiple of the width.

Weitere geometrische Ausgestaltungen und Aufteilungen bezüglich der jeweiligen Verbrennungszone 51 der ersten und zweiten Brennerzone 34, 35 sind ebenso möglich und denkbar. Analoges gilt auch für drei oder mehrere Brennerzonen eines Brennerkopfes 23, deren Flächenanteile beispielsweise sich in vorbestimmten Stufen verändern können, die jedoch eine gemeinsame Fläche bezüglich einer Verbrennungszone 51 des Brenners 11 bilden.Further geometric configurations and subdivisions with respect to the respective combustion zone 51 of the first and second burner zones 34, 35 are also possible and conceivable. The same applies analogously to three or more burner zones of a burner head 23, the area components of which can change, for example, in predetermined steps, but which form a common area with respect to a combustion zone 51 of the burner 11.

In Figur 7 ist eine alternative Ausführungsform zu Figur 1 dargestellt. Der Aufbau des Brenners 13 entspricht dem in Figur 1. Abweichend ist bei der Ausführungsform in Figur 7 zu Figur 1 vorgesehen, dass zwei separate Brennerköpfe 23 einander zugeordnet und in einer Brennerplatte 21 aufgenommen sind, wobei ein Brennerkopf 23 eine erste Brennerzone 34 und ein zweiter Brennerkopf die Brennerzone 35 bildet, die vorzugsweise in der Fläche der Verbrennungszone 51 unterschiedlich groß ausgebildet sind, wie dies aus der Stirnansicht in Figur 8 hervorgeht. Bevorzugt wird dabei die zweite Brennerzone 35 wenigstens dreimal größer, vorzugsweise fünfmal größer, als die erste Brennerzone 34 ausgelegt. Jeder Brennerkopf 23 wird über ein Gebläse 24 mit einem Brennstoff-Luft-Gemisch versorgt. Jeder Brennerkopf 23 weist einen analogen Aufbau zur ersten Brennerzone 34 oder zweiten Brennerzone 35 auf. In einem Gehäuse des Brennerkopfes 23 ist stromab der Zuführung des Brennstoff-Luft-Gemisches eine Flammenrückschlagsperre und mit Abstand hierzu eine Gewebemembran 49 vorgesehen, so dass sich auf einer Austrittsseite der Gewebemembran in einer Verbrennungszone 51 eine Flammenmatrix 52 ausbilden kann, wobei die Einzelflammen 59 und die Halteflamme 60 senkrecht zur Ebene der Gewebemembran 49 ausgerichtet sind. Die Einzelflammen 59 sind somit in Strömungsrichtung innerhalb der Verbrennungszone 51 ausgerichtet. Die Gehäuse 24 der Brennerköpfe 23 für die erste und zweite Brennerzone 34, 35 können beispielsweise in einem Berührungspunkt 65 aneinander angrenzen oder nur einen geringen Abstand aufweisen, und die zumindest eine Zündelektrode 31 und/oder Überwachungselektrode 32 können einem dadurch entstehenden Zwickel positioniert sein, so dass eine mittige oder außermittige Anordnung der Zündelektrode 31 und/oder Überwachungselektrode 32 in der ersten Brennerzone 34 nicht erforderlich ist. Jedoch kann dies auch so gewählt werden. Dadurch wird ein Überspringen der Flammenmatrix 52 aus der ersten Brennerzone 34 in die zweite Brennerzone 35 beim Zuschalten des Brenners 13 mit der zweiten Brennerzone 35 ermöglicht.In Figure 7 is an alternative embodiment to Figure 1 shown. The structure of the burner 13 corresponds to that in Figure 1 . The embodiment in FIG Figure 7 to Figure 1 It is provided that two separate burner heads 23 are assigned to one another and are received in a burner plate 21, a burner head 23 forming a first burner zone 34 and a second burner head forming the burner zone 35, which are preferably of different sizes in the area of the combustion zone 51, as shown in the front view in Figure 8 emerges. The second burner zone 35 is preferably at least three times larger, preferably five times larger, than the first burner zone 34. Each burner head 23 is supplied with a fuel-air mixture via a fan 24. Each burner head 23 has one analog structure to the first burner zone 34 or second burner zone 35. In a housing of the burner head 23, a flame non-return valve and a fabric membrane 49 are provided downstream of the supply of the fuel-air mixture, so that a flame matrix 52 can form on an outlet side of the fabric membrane in a combustion zone 51, the individual flames 59 and the holding flame 60 are aligned perpendicular to the plane of the tissue membrane 49. The individual flames 59 are thus aligned in the flow direction within the combustion zone 51. The housings 24 of the burner heads 23 for the first and second burner zones 34, 35 can, for example, adjoin one another at a contact point 65 or be only a short distance apart, and the at least one ignition electrode 31 and / or monitoring electrode 32 can be positioned in a gusset which results from this that a central or off-center arrangement of the ignition electrode 31 and / or monitoring electrode 32 in the first burner zone 34 is not necessary. However, this can also be chosen. This enables the flame matrix 52 to jump from the first burner zone 34 into the second burner zone 35 when the burner 13 is switched on with the second burner zone 35.

Bei der in Figur 8 dargestellten Anordnung können die Zündelektrode 31 und Überwachungselektrode 32 der ersten Brennerzone 34 und eine weitere Überwachungselektrode 32 der zweiten Brennerzone 35 zugeordnet sein. Alternativ können die Zündelektrode 31 und/oder Überwachungselektrode 32 auch getrennt voneinander entsprechend der ersten und/oder zweiten Brennerzone 34, 35 zugeordnet sein.At the in Figure 8 In the arrangement shown, the ignition electrode 31 and the monitoring electrode 32 can be assigned to the first burner zone 34 and a further monitoring electrode 32 to the second burner zone 35. Alternatively, the ignition electrode 31 and / or monitoring electrode 32 can also be assigned separately from one another corresponding to the first and / or second burner zone 34, 35.

Die beiden Brennerköpfe 23 werden bezüglich der Ausrichtung der Gewebemembranen 49 derart eingestellt, dass diese in einer Ebene liegen oder einen maximalen Versatz a entsprechend Figur 4 aufweisen.The two burner heads 23 are adjusted with respect to the alignment of the tissue membranes 49 in such a way that they lie in one plane or correspond to a maximum offset a Figure 4 exhibit.

Claims (13)

  1. A surface combustion burner (13) comprising a first and at least one further burner zone (34, 35) which have each an feeder tube (29, 37) for supplying a fuel-air mixture to a combustion zone (51) and which comprise, for each burner zone (34, 35), a fabric diaphragm (49) adjoining the combustion zone (51) and a flashback barrier (48) which is disposed upstream of the fabric diaphragm (49) at a given distance thereof,
    wherein each burner zone (34, 35) has a separate feeder tube (29, 37) for the fuel-air mixture and wherein the respective fabric diaphragms (49) of the burner zones (34, 35) are oriented either on the same plane or with some parallel offset with respect to each other, such that the burner zones (34, 35) have a flame matrix (52) which is oriented in the same direction within the combustion zone (51), and
    wherein for each burner zone (34, 35), a respective blower (24) for supplying the fuel-air mixture is provided or one shared blower (24) for supplying the fuel-air mixture is provided for the burner zones (34, 35), with a control valve (38) being provided in at least one of the feeder tubes (29, 37) leading to the burner zones (34, 35).
  2. The burner as claimed in claim 1, wherein the flame matrix (52) of the burner zones (34, 35) is oriented axially with respect to the direction of flow between the flashback barrier (48) and the fabric diaphragm (49).
  3. The burner as claimed in claim 1, wherein the fabric diaphragms (49) of the burner zones (34, 35) have a maximum offset (a) which is equal to, or smaller than, 100 mm.
  4. The burner as claimed in any of the preceding claims, wherein at least one ignition electrode (31) and/or at least one monitoring electrode (32) is/are associated with, or integrated in, the burner zone (34, 35) that is to be ignited at first.
  5. The burner as claimed in any of the preceding claims, wherein the first burner zone (34) is completely surrounded by the at least one further burner zone (35).
  6. The burner as claimed in any of the preceding claims, wherein the first burner zone (34) and the at least one further burner zone (35) have each the same surface proportion.
  7. The burner as claimed in any of the preceding claims, wherein between the first and the at least one further burner zones (34, 35), a shared contact line (64) or a shared contact point (65) of the adjacent flame matrices (52) is provided.
  8. The burner as claimed in any of the preceding claims, wherein at least the first and the at least one further burner zones (35) have a circular, rectangular, or square combustion zone (51).
  9. The burner as claimed in any one of claims 1 to 5, wherein the at least one further burner zone (35) has at least two times, preferably between two and seven times the surface proportion of the first burner zone (34).
  10. The burner as claimed in any of the preceding claims, wherein the fuel-air mixture is mixed before having passed the at least one blower (24) or is mixed after having passed the at least one blower (24), and is subsequently supplied to the at least one burner stage (34, 35).
  11. The burner as claimed in any of the preceding claims, wherein the first and the at least one further burner zones (34, 35) are disposed in a shared burner head (23).
  12. The burner as claimed in any one of claims 1 to 9, wherein the first burner zone (34) and the at least one further burner zone (35) are each formed by a separate burner head (23).
  13. A heat generator having a housing (16) which surrounds a burner chamber (12) that may be closed by a burner plate (21), characterised in that a burner (13) as claimed in any one of claims 1 to 12 is disposed on said burner plate (21).
EP15701036.4A 2014-03-11 2015-01-27 Multistage surface burner Active EP3117146B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202014101097.1U DE202014101097U1 (en) 2014-03-11 2014-03-11 Burner with a surface combustion
PCT/EP2015/051536 WO2015135679A1 (en) 2014-03-11 2015-01-27 Multistage surface burner

Publications (2)

Publication Number Publication Date
EP3117146A1 EP3117146A1 (en) 2017-01-18
EP3117146B1 true EP3117146B1 (en) 2020-03-11

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EP15701036.4A Active EP3117146B1 (en) 2014-03-11 2015-01-27 Multistage surface burner

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EP (1) EP3117146B1 (en)
DE (1) DE202014101097U1 (en)
WO (1) WO2015135679A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018120992A1 (en) * 2018-08-28 2020-03-05 Walerij Schlagin Burner unit for a heating system

Citations (1)

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EP0433208A1 (en) * 1989-12-11 1991-06-19 Gas Natural Sdg, S.A. A burner for glass-ceramic cooker tops.

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NL176301C (en) * 1974-08-24 Schwank Gmbh APPLIANCE WITH AT LEAST ONE GAS BURNER FOR A HOB.
EP1091176A1 (en) * 1999-10-05 2001-04-11 A.C. di Amati Carlo & C.S.a.s. Burner device for hobs of gas cookers
US6453672B1 (en) 2001-03-15 2002-09-24 Alzeta Corporation Segmented surface-stabilized gas burner and method of use with gas turbines
DE10251816A1 (en) * 2002-04-16 2004-05-13 Rolf Kresel Gas burner for boiler has burner plate insulated from lower casing and elastically connected to it
WO2006019279A1 (en) * 2004-08-19 2006-02-23 Kyungdong Boiler Co., Ltd. Gas burner
DE102007008895A1 (en) * 2007-02-23 2008-08-28 BSH Bosch und Siemens Hausgeräte GmbH burner plate
CA2712497C (en) * 2008-01-28 2016-07-12 Tetra Laval Holdings & Finance Sa Gas burner
US8286594B2 (en) 2008-10-16 2012-10-16 Lochinvar, Llc Gas fired modulating water heating appliance with dual combustion air premix blowers
DE102009058453B4 (en) * 2009-12-16 2011-09-01 Robert Bosch Gmbh Gas blower burner with modulable burner power and method for operating a gas blower burner
DE102010051414B4 (en) 2010-11-16 2013-10-24 Ulrich Dreizler Combustion method with cool flame root
DE102012104741A1 (en) * 2012-06-01 2013-12-05 Ulrich Dreizler Process for the complete and reduced-noise combustion of a fuel-air mixture and burner for this purpose
CA2878086C (en) * 2012-07-03 2020-07-28 Ulrich Dreizler Burner with surface burning

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EP0433208A1 (en) * 1989-12-11 1991-06-19 Gas Natural Sdg, S.A. A burner for glass-ceramic cooker tops.

Also Published As

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EP3117146A1 (en) 2017-01-18
DE202014101097U1 (en) 2015-06-12
WO2015135679A1 (en) 2015-09-17

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