AT516424A1 - Apparatus and method for operating a flame - Google Patents

Apparatus and method for operating a flame Download PDF

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Publication number
AT516424A1
AT516424A1 ATA50772/2014A AT507722014A AT516424A1 AT 516424 A1 AT516424 A1 AT 516424A1 AT 507722014 A AT507722014 A AT 507722014A AT 516424 A1 AT516424 A1 AT 516424A1
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AT
Austria
Prior art keywords
combustible
flame
oxidizing agent
nozzle
main
Prior art date
Application number
ATA50772/2014A
Other languages
German (de)
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AT516424B1 (en
Original Assignee
Giuliani Fabrice Louis Michel Dr
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Application filed by Giuliani Fabrice Louis Michel Dr filed Critical Giuliani Fabrice Louis Michel Dr
Priority to ATA50772/2014A priority Critical patent/AT516424B1/en
Publication of AT516424A1 publication Critical patent/AT516424A1/en
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Publication of AT516424B1 publication Critical patent/AT516424B1/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23QIGNITION; EXTINGUISHING-DEVICES
    • F23Q9/00Pilot flame igniters
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D14/00Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/26Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid with provision for a retention flame
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D17/00Burners for combustion conjointly or alternatively of gaseous or liquid or pulverulent fuel
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23NREGULATING OR CONTROLLING COMBUSTION
    • F23N5/00Systems for controlling combustion
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23NREGULATING OR CONTROLLING COMBUSTION
    • F23N5/00Systems for controlling combustion
    • F23N5/26Details
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23QIGNITION; EXTINGUISHING-DEVICES
    • F23Q9/00Pilot flame igniters
    • F23Q9/02Pilot flame igniters without interlock with main fuel supply
    • F23Q9/04Pilot flame igniters without interlock with main fuel supply for upright burners, e.g. gas-cooker burners
    • F23Q9/045Structurally associated with a main-burner
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D2205/00Assemblies of two or more burners, irrespective of fuel type

Abstract

The invention relates to a device (1) for operating a flame, comprising at least one supply line (2) for at least one, in particular, oxidizing agent and at least one combustible material, in particular a combustible gas, a burner for burning same and a sounding device (4) which the oxidizing agent is vibratable. According to the invention, it is provided that the burner comprises at least one control region for guiding the vibrating oxidizing agent and the combustible material to produce a pilot flame (6) and at least one main region for at least one main flame (8), the control region being connected to the sonicating device (4 ) is connected and wherein in the main area, another oxidizing agent and another combustible material are feasible. Furthermore, the invention relates to a use of such a device (1). Moreover, the invention relates to a method for operating a flame, wherein at least one in particular oxidant gas and at least one combustible material, in particular a combustible gas, are fed to a burner, wherein the oxidizing agent is vibrated by a sonication device (4), wherein it is provided that the oxidizing agent is combined with the combustible material and the combustible material is burned, wherein a further combustible material is burned away from it while supplying a further oxidizing agent.

Description

Apparatus and method for operating a flame
The invention relates to a device for operating a flame, comprising at least one supply line for at least one in particular oxidant gaseous and at least one combustible material, in particular a combustible gas, a burner for burning the same and a sonicator, with which the oxidizing agent is vibrated.
Furthermore, the invention relates to a use of such a device.
In addition, the invention relates to a method for operating a flame, wherein at least one in particular oxidant gas and at least one combustible material, in particular a combustible gas, are led to a burner, wherein the oxidizing agent is vibrated by a sonicator.
Many combustion processes in industry and research require a high-energy flame, such as burning biomass, in cement works, or in research laboratories. In order to produce such a flame, a lot of fuel is usually necessary, in particular fuel with a high calorific value. Due to ever increasing fuel prices, operating such a flame is very expensive. In addition, an environmental impact of high polluting emissions, especially of CO 2, correspondingly large, with a level of emissions can depend greatly on turbulence of the flame resulting from burning. When a flame moves turbulently, a portion of soot may rise and the flame will turn amber. In such a state of the flame, the emission of polluting gases is maximum.
When operating a flame, care should therefore be taken to ensure that it burns as stably as possible and without strong vibrations in order to keep emissions low on the one hand and to ensure the most uniform possible heat or energy release on the other hand. For this purpose, it may be necessary to keep the fuel supply constant high, which in turn causes high costs.
From the prior art devices have become known with which instabilities of a flame can be reduced. In this case, the flame or a gas mixture to be combusted is acoustically modulated, whereby a flame burns controllable and turbulence of these can be limited in accordance with the selected frequency. As a result, although an emission of polluting gases at a suitable frequency can be reduced, a need for cost-intensive fuel is still high.
In examining the burning properties of one or more flames and their combustion turbulences, it has been discovered by chance in the invention that a flame which carries out vibrations entrains adjacent flames or transfers their turbulences and vibrations to them.
The object of the invention is to provide a device of the type mentioned, with which a flame can be operated efficiently and inexpensively by utilizing this randomly discovered effect.
It is another object of the invention to provide a use of such a device.
Another object of the invention is to provide a method of the type mentioned, with which a flame can be operated efficiently and inexpensively by utilizing this randomly discovered effect.
The first object is achieved according to the invention in that in a device of the type initially mentioned the burner comprises at least one control region for guiding the vibrating oxidizing agent and the combustible material to produce a pilot flame and at least one main region for at least one main flame, wherein the control region the sonicating device is connected and wherein in the main region further oxidizing agent and another combustible material can be guided.
An advantage achieved by the invention is to be seen in particular in that, by a spatial separation of the control area from the main area only this part of
Oxidizing agent is set into vibration, which generates the pilot flame. The pilot flame generated by combustion of the combustible material burns quietly, spatially close and, if possible, without unwanted or uncontrollable turbulence. The pulsed pilot flame further has a high energy density and high reaction rate, thereby accelerating a firing process. In the tax area, only a small amount of flammable material is guided, which reduces costs. Also, the public address device can be made smaller in comparison to the prior art, whereby further costs can be saved. Due to the spatial separation of the control region from the main region, it is possible in the device according to the invention to guide in each case a different combustible material and / or in each case a different oxidizing agent. As a rule, however, the same oxidant is conducted in the control area and in the main area, for example air. According to the invention, however, different oxidation agents may be provided in each case. By a device according to the invention, in particular by the vibrating oxidizing agent, a mixing of the reactants is optimized. According to the invention, the oscillations of the pilot flame or support flame are transmitted to the at least one main flame, so that these burns stable and possible without unwanted turbulence. The pilot flame can be operated preferably about one tenth of the power of the main flame.
Advantageously, the sonication device is designed in such a way that a frequency and / or an amplitude of the vibrating oxidizing agent can be fixed with the latter and these can be transferred from the oxidizing agent to the resulting pilot flame during combustion of the combustible material. The frequency and / or amplitude is adjustable according to a desired pulsation of the flames. Several frequencies or a frequency range may prove beneficial. The sound system can be designed as a siren, which is mounted in a housing which withstands high pressures, eg. B. up to 10 bar and more. According to the invention, the siren can comprise a toothed wheel which can be driven by a shaft via an electric motor. The oxidant flows through a supersonic nozzle to the gear which intersects the particular gaseous oxidant and this induces a frequency and / or amplitude. By a variation of a number of the teeth of the gear, a size and / or a speed of the gear while the frequency and / or the amplitude of the
Oxidizing agent fixable. Thus, the oxidizing agent is acted upon by sound and vibrates at a predetermined frequency and / or amplitude. Such a trained siren has the advantage that it works properly even under high pressure or temperature conditions. In addition, this is also resistant to contamination and corrosion, which is why aggressive gases are feasible by this. During combustion of the combustible material, this frequency and / or amplitude can be transmitted to the resulting pilot flame, it being possible by the sound system to respond immediately to any occurring turbulence of the flame. In particular, the frequency is chosen so that a pulsed and uniform firing of the pilot flame is made possible, wherein the frequency is also dependent on a volume of the different areas of the device. As an alternative to the siren, the sounding device can also be designed as a loudspeaker or other sounding means, with a siren being particularly well suited for industrial applications due to the abovementioned advantages.
Advantageously, at least one nozzle is further arranged in the control area, through which a mixture of the oxidizing agent and the combustible material is feasible to burn the combustible material in the region of the nozzle as a pilot flame, wherein the nozzle is designed such that a speed of the mixture an output thereof is at least twice as fast as at an input thereof, in particular more than four times as fast. The nozzle can be designed such that a diameter of this is greater in a cross-section at the entrance than at the exit. It may be beneficial if this is about twice as large to avoid a kickback of the pilot flame or main flame. The nozzle is thus formed similar to a Venturi nozzle and a pressure drop of the mixture is kept as low as possible. The nozzle is acoustically transparent, that is, sound waves pass through it as possible without attenuation and the nozzle itself causes little noise. The pilot flame burns in the area of this nozzle and oscillates with the frequency and / or the amplitude which is induced by the oxidizing agent. In addition, according to the invention it can be provided that the nozzle is formed with a vortex generator, so that the mixture is induced by the nozzle, an angular momentum to generate the flame spaced from the nozzle. In this case, little heat is transferred to the nozzle or a plate on which the nozzle is arranged, whereby a thermal load on the nozzle is kept low and a lifetime of this is extended. Also, the spacing of the flame from the nozzle ensures that it burns more robustly and is not easily erased. Further, the spaced operation of the flame has the advantage that a flame front is formed flat and a modulation of this is constant and uniform. A suitable nozzle ensures that a ratio between the flow direction and flow rate of the mixture through the nozzle is optimized. Due to the simultaneous design of the nozzle as Venturi nozzle and vortex generator this is very efficient and at the same time inexpensive to manufacture.
It is preferably provided that at least one further nozzle is arranged in the main region, through which a mixture of the further combustible material and further oxidizing agent can be performed to burn the further combustible material in the region of the at least one further nozzle as one, in particular several, main flames , Preferably, a plurality of nozzles may be provided, which are arranged around the nozzle of the control area around. In particular, nine or more nozzles arranged in the form of a grid may be provided, wherein the nozzle of the control region is arranged centrally. According to the invention it is advantageous if the nozzles of the main area are constructed identical to the nozzle of the control area.
It may be advantageous if the nozzles are arranged at one end of the burner with a predetermined maximum distance spaced from each other to allow transmission of the frequency and / or the amplitude of the pilot flame to the at least one main flame. The distance of the nozzles is dependent on how many nozzles are arranged and how large the flame created during combustion should be. The material which burns in the area of the nozzles of the main area can be a gas with a low calorific value, eg. B. biogas in a biogas combustion for disposal of the same. A frequency and / or an amplitude of the pilot flame or support flame is transmitted at a correspondingly selected distance of the nozzle from the pilot flame to the main flame and thus enables a burning of a gas with a very low calorific value and subsequently effective generation of a flame, which under low Consumption of fuel with high calorific value stable and possible without unwanted turbulence burns. As a result, on the one hand the costs are reduced and on the other hand environmentally harmful emissions reduced. In addition, in the main area can also be a conventional gas like
Methane or butane. By the pulsation of the pilot flame and the at least one main flame, an efficiency of a flame is increased or can be reached with less gas supply a same temperature of a flame. Regardless of the guided combustible material, the nozzles are arranged so that combustion or existence of the at least one main flame is ensured by the pilot flame.
A use of a device according to the invention is advantageously carried out when burning a gas with a low calorific value.
The further object is achieved in that in a method of the type mentioned, the oxidizing agent combined with the combustible material and the combustible material is burned, spaced therefrom another combustible material is burned under supply of oxidant.
In a method according to the invention, only a part of the oxidizing agent is acted upon by sound, combined with the combustible material and burned the combustible material. The further combustible material and the further oxidizing agent are thereby guided in a spaced manner by the sonicating oxidizing agent and at the same time burnt. The oxidizing agent is preferably vibrated by a sonic device designed as a siren and further combined with the combustible material, which is burned. A spaced apart arrangement of two combustible materials according to the invention thus allows for guiding two different combustible materials, for example a high calorific value low-calorie combustible gas. However, it can also be provided that in each case the same combustible material is guided. In general, in each case the same oxidant is performed or used, z. For example, air. However, it is also possible to carry two different oxidizing agents.
Advantageously, it is provided that mixtures of oxidizing agents and combustible materials are guided via nozzles to the outside, wherein a combustible material in at least one control area in the region of a nozzle as a pilot flame and another combustible material in at least one main area in the range of at least one, in particular more , other nozzles is burned as the main flame. The pilot flame can be operated preferably about one tenth of the power of the main flame, whereby energy is saved. According to the invention, it may be provided that conventional combustible material such as methane or butane is burned in the control area. In contrast, it can be provided that in the main area a gas with low calorific value is burned. A low calorific gas is less expensive than a conventional combustible gas and thus reduces the cost involved in a flame generation process. However, it can also be performed in the main area a conventional gas. In the case of a main flame which arises as a result, an energy supply necessary for achieving a desired temperature of the main flame can be reduced as a result of the pulsation of the latter in comparison with the prior art. It is advantageous if a frequency and / or an amplitude of the sounding device are received by the mixture in the control area and transmitted to the pilot flame and from there to the main flame. The frequency and / or amplitude can be selected according to the desired pulsation of the flames. In this case, several frequencies or even a frequency range may prove favorable. Generally speaking, the lower a frequency, the more turbulent the combustion. To generate the at least one main flame, a gas with a low calorific value can be burned, whereby the energy to be expended is reduced. By sonicating the pilot flame and transmitting that frequency and / or amplitude to the main flame, a low calorific gas can be readily burned and a robust flame created which is resistant to extinguishment thereof. For this purpose, the nozzles can preferably be arranged at a distance from one another, the distance being predetermined such that the oscillations of the pilot flame are absorbed by the main flame (s).
Advantageously, it can further be provided that the flame is induced by the nozzles an angular momentum, wherein the flame from the pilot flame and at least one main flame is composed. The induced angular momentum generates the pilot flame and the at least one main flame at a distance from the respective nozzles in order to control the heat transfer or heat transfer to the nozzles or a plate on which the nozzles can be arranged. In addition, a flame is generated with a flat flame front. The
Modulation of the oxidant is transferable as possible without losses to the pilot flame and subsequently to the main flame, since the nozzles are acoustically transparent.
Further features, advantages and effects will become apparent from the embodiments illustrated below. In the drawings, to which reference is made, show:
1 shows a device according to the invention;
FIG. 2 shows a section through a device according to the invention according to FIG. 1 along the line II-II; FIG.
3 shows a further device according to the invention;
4 shows a nozzle;
5 shows a section through the nozzle along the line V-V in Fig. 4.
Fig. 6 is a bottom view of a nozzle;
7 shows a burner with nozzles in plan view;
8 shows a further burner in plan view;
9 is a schematic representation of a device according to the invention for explaining a method according to the invention;
Fig. 10 is a schematic representation of a nozzle for explaining a method according to the invention.
Fig. 1 shows an inventive device 1 for operating a flame. The device 1 comprises at least one supply line 2 for at least one in particular gaseous oxidizing agent and at least one combustible material, in particular a combustible gas. Via a supply line 2, not shown in Fig. 1, the oxidizing agent and the gas can be fed to a burner 3, wherein a sonicator 4 is provided upstream of this, with which the oxidizing agent is vibrated before being supplied to the burner 3. The sonicator 4 may be formed as a siren, which is mounted in a housing which withstands high pressures. The siren may according to the invention comprise a gear which is driven by an electric motor with a shaft. The gaseous oxidant flows through a critical nozzle or Laval nozzle to the gear which intersects this and thereby this one
Frequency and / or an amplitude induced. By a variation of a size, a number of teeth of the gear and / or a speed of the gear while the frequency and / or the amplitude of the oxidizing agent can be fixed. As an alternative to the siren, the sounding device 4 can also be designed as a loudspeaker or other sounding means. For the first oxidizing agent and the combustible material, a control region 5 is provided, in which the combustible material burns with the release of a pilot flame 6. The pilot flame 6 is not shown in FIG. 1, since, according to the invention, it can be arranged inside a protective cover 10 for safety-relevant reasons. Via at least one further supply line 2, further oxidizing agent and another gas can be supplied to the burner 3 without any vibration. In this case, a main area 7 is provided, in which the further gas can be combusted by merging with the further oxidizing agent as at least one, preferably a plurality of main flames 8. The main flames 8 are also spaced from the pilot flame 6 also disposed within the protective cover 10 and therefore not shown in Fig. 1. The protective cover 10 may comprise at least one window for observing the flame, wherein the window z. B. of quartz glass and the protective cover 10 z. B. may be formed of a steel.
Fig. 2 shows a section through an inventive device 1 according to FIG. 1 along the line ll-ll. Herein now the pilot flame 6 and main flame 8 and the control area 5 and the main area 7 are shown. The control area 5 is arranged approximately centrally in the burner 3 and the main area 7 around it. In the control area 5, the oxidizing agent acted upon with sound can be combined with the gas and the gas combustible, wherein the sounding device 4 is not shown. The part of the device 1 shown in Fig. 2 comprises three resonance bodies 11a, 11b, 11c, with which a plurality of resonance modes can be excited, wherein the resonance bodies 11a, 11b, 11c can function like Helmholtz resonators.
FIG. 3 shows a further device 1 according to the invention without protective cover 10. The pilot flame 6 is arranged at an upper end of the burner 3 and surrounded by eight main flames 8. The respective mixtures of oxidizing agent and gas can be led to the outside via nozzles 9 and the gas burns in the region of the nozzles 9, the nozzles 9 being arranged on a plate 12. The burner 3 is in this case designed by the control area 5 and the main area 7 as a two-stage burner 3. According to the invention, however, a burner 3 may also be provided which comprises three, four or more stages.
4, 5 and 6 show three views of a nozzle 9 as it is used in a device 1, in particular in the control area 5. FIG. 5 shows a section along the line VV of the nozzle 9 from FIG. 4. FIG shows a bottom view of a nozzle 9 and a nozzle 9 in the flow direction of a mixture of oxidant and combustible material. A lower cross-sectional area of the nozzle 9 is larger, preferably four times as large, as an upper cross-sectional area formed to increase an exit velocity of the mixture. The combustible material or gas can be supplied to the oxidizing agent via a tube 13. The tube 13 is arranged approximately centrally in the nozzle and held in particular by three fasteners such as screws in position. In order to maximize a high velocity of the material carried therein, the tube 13 may be formed with a small free diameter, preferably less than 1.5 mm, in particular about 0.8 mm. By way of the constriction 14 of the nozzle 9 which can be seen in FIGS. 4 and 5, this works like a venturi nozzle; a dynamic pressure becomes maximum and a static pressure minimal. The dimensions of the nozzle 9 can be adapted to a type and amount of the combustible material and thus be significantly larger, for example, for a guidance of a gas with low calorific value, as stated above. It may be favorable for this purpose that the nozzle 9 is dimensioned so that a speed of the combustible material is significantly higher than a corresponding one of the oxidizing agent. In general, the free diameter of the tube 13 appears to be essential in adapting the nozzle 9 to the type or amount of gas to be combusted. The remaining dimensions are scaled accordingly.
Fig. 6 further shows that an upper portion 15 of the nozzle 9 is cut along its longitudinal axis to a predetermined point and the two resulting parts are arranged offset from one another. The upper end of the nozzle 9 is not cut through. The two parts of the upper portion 15 of the nozzle 9 may according to the invention preferably be arranged offset from one another such that respective ends are arranged in a center of a respective diameter. As a result, a vortex generator is generated by which the resulting flame, an angular momentum is inducible and with which a pressure drop of the gas to be burned is kept as low as possible. The tube 13 is at a beginning of the constriction 14 or at a cross-sectional change of this centrally disposed on the upper portion 15 spaced therefrom, wherein a distance between the tube 13 and upper portion 15 may be about 3 mm to 6 mm, preferably 4 mm to 5 mm , The distance is in turn dependent on a type and amount of combustible material and thus on a size of the nozzle 9 and the burner 3 and therefore can also be significantly larger or smaller. Generally this can correspond to about half the free diameter of the tube 13. A construction or production of such a nozzle 9 is inexpensive compared to the production of a conventional nozzle. In addition, this is very efficient by their simultaneous training as venturi and vortex generator.
FIGS. 7 and 8 respectively show a variant of a burner 3 and the plate 12 with the nozzles 9 arranged thereon in plan view. In Fig. 7, nine nozzles 9 offset from each other approximately flush with the plate 12 are arranged finally. A distance of the individual nozzles 9 is dependent on a size of the burner 3 and the nozzles 9 itself. According to the invention, a spacing of the nozzles 9 is selected such that vibrations of the pilot flame 6 can be transmitted to the main flame 8. It can be provided that all nozzles 9 are of identical construction according to FIGS. 4, 5 and 6. Alternatively, the nozzles 9 of the main area 7 may also be formed as an open-ended tube. In FIG. 8, a central nozzle 9 in the control region 5 for the pilot flame 6 is arranged centrally on the plate 12. Around this nozzle 9 around 7 slot openings 16 are provided for the main flame 8 in the main area. Also, a distance of the nozzle 9 is predetermined to the slot openings 16 to ensure a transmission of the vibrations of the pilot flame 6 to the main flame 8.
In a method according to the invention for operating a flame, as shown in FIG. 9, the first oxidizing agent is conducted via the supply line 2 through the sounding device 4 and thereby caused to oscillate. Subsequently, the oxidizing agent is combined in the control area 5 with the gas to be burned, to which a frequency and / or an amplitude of the oxidizing agent are transferred. The supply of the gas to be combusted is shown in FIG. 9 as an arrow in the control area 5. This resulting mixture is passed through the nozzle 9 of the control area 5 and the gas is in the range of this as
Pilot flame 6 burned. A selection of the frequency or the amplitude is chosen so that a uniform oscillation of the pilot flame 6 is made possible. The frequency or amplitude of the mixture is transmitted to the pilot flame 6 and this vibrates. As gas can be burned, for example, methane or butane.
The nozzle 9 is, as shown in Fig. 10, formed such that a speed of the mixture at the end of this is preferably at least four times as fast as at the beginning. For this purpose, an end-side diameter of the nozzle 9 may be formed smaller than an input-side diameter, in particular, an input-side diameter in cross-section may be about twice as large as an end-side. As a result, a return of the pilot flame 6 and the main flame 8 is prevented because they are spin-stabilized. The gas to be burned is passed via the tube 13 into the nozzle 9, while the oxidizing agent is passed outside the tube 13 in this. The feed and a further guide course of the gas to be combusted are shown in FIG. 10 by arrows. Due to the formation of the nozzle 9 as Venturi nozzle or through the constriction 14 it comes to the end of the nozzle 9 outside of the upper portion 15 to a jam, whereby the gas to be burned is forced to enter the upper portion 15 of the nozzle 9 and with the To mix oxidizing agent. Thus, a pressure drop within the nozzle 9 remains as low as possible and there is no blocking of the flow. In addition, a deposit is largely avoided in an impure flow. The nozzle 9 is thereby acoustically transparent, whereby neither sound waves are absorbed nor caused in the entire burner 3. Further, the nozzle 9 is formed such that the pilot flame 6 is induced an angular momentum to space the pilot flame 6 from the nozzle 9 and the plate 12, respectively. For this purpose, the gas to be combusted is combined in the upper section 15 with the oxidizing agent. By this formed as a vortex generator upper portion 15, a resulting flame is lifted from the nozzle 9. In the control region 5, the material to be burned is usually mixed with the oxidizing agent before it is fed to the nozzle 9, as shown in FIG. 9. Via at least one further supply line 2, a further oxidizing agent to the burner 3, not shown in Fig. 9 are feasible. The further oxidizing agent is guided directly into a plenum 17, without passing through the PA 4. The plenum 17 can be used as a resonator 11c. This is combined in the main area 7, not shown in FIG. 9, with another combustible material which is burned as preferably a plurality of main flames 8. The supply of the further combustible material is also indicated in FIG. 9 with two arrows, which are arranged outside the control area 5. This mixture is passed through nozzles 9 to the outside. The nozzles 9 can preferably be of identical design as the nozzle 9 of the control region 5, whose operation is explained with reference to FIG. According to the invention, it can be provided that the nozzles 9 are arranged at a distance from one another so that the frequency and / or the amplitude of the pilot flame 6 are transmitted to the at least one main flame 8. Alternatively, the further mixture, instead of being guided via the nozzles 9 via the slot openings 16 in the plate 12 to the outside and the gas to be burned. The main flames 8 thus absorb the vibration of the pilot flame 6 and oscillate at the same frequency and / or amplitude as these.
It can be provided that in the main area 7, a gas with a low calorific value is performed. By applying the pilot flame 6 to sound and transmitting this pulsation to the main flames 8, low calorific gases can be burned and the resulting flame can be kept stable without extinguishing. Instead of the gas with a low calorific value, a conventional gas such as methane or butane can also be conducted in the main area 7 according to the invention. During combustion of such a gas, the thermal efficiency of the combustion is increased by the pulsation.
The inventive device 1 and the method according to the invention can thus, inter alia, when burning biogas, for energy production or for flame cutting of z. As steel used or applied.

Claims (10)

1. Device (1) for operating a flame, comprising at least one supply line (2) for at least one in particular oxidant and at least one combustible material, in particular a combustible gas, a burner (3) for burning the same and a sounding device (4) in which the oxidizing agent is oscillatable, characterized in that the burner (3) has at least one control region (5) for guiding the vibrating oxidizing agent and the combustible material to produce a pilot flame (6) and at least one main region (7). for at least one main flame (8), wherein the control area (5) is connected to the sounding device (4) and wherein in the main area (7) further oxidizing agent and a further combustible material can be guided.
2. Device (1) according to claim 1, characterized in that the sonication device (4) is designed such that with this a frequency and / or amplitude of the vibrated oxidizing agent can be fixed and this in a combustion of the combustible material from the oxidant to the resulting pilot flame (6) are transferable.
3. Device (1) according to claim 1 or 2, characterized in that in the control area (5) at least one nozzle (9) is arranged through which a mixture of the oxidizing agent and the combustible material is feasible to the combustible material in the area the nozzle (9) as a pilot flame (6) to be burned, wherein the nozzle (9) is formed such that a speed of the mixture at an output thereof is at least twice as fast as at an entrance thereof, in particular more than four times as fast.
4. Device (1) according to claim 3, characterized in that in the main region (7) at least one further nozzle (9) is arranged, through which a mixture of the further combustible material and further oxidizing agent is feasible to the other combustible material in the area the at least one further nozzle (9) as one, in particular several, main flames (8) to burn.
5. Device (1) according to claim 4, characterized in that the nozzles (9) at one end of the burner (3) are spaced apart from each other with a predetermined maximum distance to a transmission of the frequency and / or the amplitude of the pilot flame (6 ) to allow the at least one main flame (8).
6. Use of a device (1) according to any one of claims 1 to 5 for the combustion of a gas with a low calorific value.
7. A method for operating a flame, wherein at least one in particular gaseous oxidizing agent and at least one combustible material, in particular a combustible gas, are led to a burner (3), wherein the oxidizing agent is vibrated by a sonication device (4), characterized in that the oxidizing agent is brought together with the combustible material and the combustible material is burned away, with a further combustible material being burned away from it while being supplied with oxidizing agent.
8. The method according to claim 7, characterized in that mixtures of oxidizing agent and combustible materials via nozzles (9) are led to the outside, wherein a combustible material in at least one control area (5) in the region of a nozzle (9) as a pilot flame (6). and combusting a further combustible material in at least one main area (7) in the region of at least one, in particular a plurality of, further nozzles (9) as main flame (8).
9. The method according to claim 7 or 8, characterized in that a frequency and / or amplitude of the sounding device (4) of the mixture in the control area (5) and received to the pilot flame (6) and from this to the main flame (8). be transmitted.
10. The method according to claim 8 or 9, characterized in that the flame is induced by the nozzles (9), an angular momentum, wherein the flame from the pilot flame (6) and at least one main flame (8) is composed.
ATA50772/2014A 2014-10-27 2014-10-27 Device and method for operating a flame AT516424B1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19641843A1 (en) * 1995-10-13 1997-04-17 Us Energy Stabilization of pressure vibrations in combustion devices and methods therefor
DE19636093A1 (en) * 1996-09-05 1998-03-12 Siemens Ag Method and device for acoustic modulation of a flame generated by a hybrid burner
DE102008006607A1 (en) * 2008-01-30 2009-08-06 Ibu-Tec Advanced Materials Ag Process for the preparation of finely divided particles

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19641843A1 (en) * 1995-10-13 1997-04-17 Us Energy Stabilization of pressure vibrations in combustion devices and methods therefor
DE19636093A1 (en) * 1996-09-05 1998-03-12 Siemens Ag Method and device for acoustic modulation of a flame generated by a hybrid burner
DE102008006607A1 (en) * 2008-01-30 2009-08-06 Ibu-Tec Advanced Materials Ag Process for the preparation of finely divided particles

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