EP0947770A2 - Gasbrenner - Google Patents
Gasbrenner Download PDFInfo
- Publication number
- EP0947770A2 EP0947770A2 EP99105813A EP99105813A EP0947770A2 EP 0947770 A2 EP0947770 A2 EP 0947770A2 EP 99105813 A EP99105813 A EP 99105813A EP 99105813 A EP99105813 A EP 99105813A EP 0947770 A2 EP0947770 A2 EP 0947770A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- burner
- gas
- burner body
- air mixture
- fuel gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
- F23C99/00—Subject-matter not provided for in other groups of this subclass
- F23C99/006—Flameless combustion stabilised within a bed of porous heat-resistant material
-
- 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
Definitions
- the invention relates to a gas burner with a burner body by a porous structure is at least partially penetrated, and in the one Fuel gas-air mixture is combustible, and a method for combustion of a fuel gas-air mixture in a gas burner.
- the porous burner body for example one Foam ceramic, a bed of solids or a wire mesh on one Distribution plate attached. It can be a cylindrical, for example cube or have a cuboid shape.
- the fuel gas-air mixture becomes the burner body fed via the distributor plate.
- the reaction zone When the burner output is low, the reaction zone extends only a little into the burner body, starting from the distributor plate. With increasing burner output, the combustion zone, as seen in the direction of flow, increasingly spreads in the burner body. When designing the burner body, its volume is dimensioned such that combustion processes take place in almost the entire burner body at maximum burner output. At low burner capacities, the temperature in the reaction zone decreases transversely to the direction of flow as a result of heat extraction processes. Due to the low temperatures prevailing in the peripheral areas, CO can no longer react to CO 2 . This creates an undesirable high CO production.
- This object is achieved in that the cross to the flow direction of the cross-sectional area of the fuel gas-air mixture of the reaction zone of the burner body in which the combustion takes place, in the direction of flow enlarged at least in a partial area of the burner body.
- the method according to the invention provides that at a low Burner performance of the gas burner a higher temperature volume load in the Burner body is generated than with a higher burner output.
- the design of a gas burner according to the invention enables an increased temperature surface or volume load with a low burner output.
- a temperature level in the burner body at which CO can react to CO 2 can thus also be achieved in this operating state.
- a higher modulation range for the burner output can also be achieved than with conventional gas burners. Controlled combustion can take place here even at low fuel gas / air mixture concentrations.
- the Cross-sectional area of the reaction zone continuously increased.
- the entrance cross-sectional area via the burner body the fuel gas-air mixture flows in is formed by the smaller circular area of the burner body.
- the measure The conicity of the burner body is determined by the desired modulation range of the gas burner.
- the fuel gas-air mixture in the burner body Can be introduced via a supply line and here via a cylindrical or spherical Distributor is delivered.
- the fuel gas-air mixture can be ring or flow spherically into the burner body and ignite here.
- the cross-sectional area of the reaction zone can also be provided enlarged over one or more increments. Then there are certain ones Performance areas assigned to the various increments. For example the use of three increments has proven itself, one first step jump covers 0 to 40% of the burner output, a second 40 to 60% and the third step jump 60 to 100% of the burner output.
- the burner body two or more cylindrical or circular disc-shaped fuel elements has a different diameter, and that the Central longitudinal axes of the partial fuel elements are arranged in alignment with one another.
- the partial fuel body in the flow direction of the fuel gas-air mixture have different thicknesses. It is also conceivable that a burner body has such a cross-sectional geometry in the reaction zone that partly continuously and partly over one or more increments enlarged.
- a burner body 10 is shown, which is a stump-shaped Has geometry.
- the burner body 10 is of a lateral lateral surface 13, an inlet surface 11 and an exhaust gas outlet surface 12.
- the Entry surface 11 and exhaust gas exit surface 12 are circular.
- a combustible gas / air mixture is supplied to the burner body 10 via the inlet surface 11 forwarded. Here it flows into the porous burner body 10 and ignites yourself.
- the reaction zone in which the The fuel gas-air mixture is converted starting from the entry surface 11 only low into the burner body 10.
- Due to the conical geometry of the Burner body 10 the available combustion volume at the low Burner output kept low. This creates a high temperature area or - volume load. With increasing burner output, too the volume flow of the fuel gas-air mixture that flows into the burner body 10 elevated.
- the reaction zone extends increasingly into the burner body 10 in. This also enlarges the reaction zone.
- the Temperature areas or volume loads then decrease.
- a burner body 10 is illustrated in FIG. 2, the two partial burner bodies 14.1, 14.2.
- the partial fuel body 14.1 has a frustoconical shape Geometry.
- the partial fuel body 14.2 is cylindrical.
- the two Partial burners 14.1, 14.2 can be manufactured individually or it can be provided that these are integrally connected.
- In the partial firing element 14.1 is a continuous enlargement of the cross-sectional area the burner body 10 realized.
- a certain performance range can be found here extend the gas burner.
- the power can be from 0 up to 40% of the total output of the gas burner.
- Following the Partial fuel body 14.1 shifts the reaction zone over the entry surface 11 '' in the second partial fuel body 14.2. In this area the rest Power of the gas burner.
- Fig. 3 illustrates a gas burner 10 in which the cross-sectional area enlarged in the direction of flow of the gas-air mixture by increments.
- three partial fuel elements 14.1, 14.2, 14.3 are used.
- This part-firing body 14.1, 14.2, 14.3 have a cylindrical shape and are of the Shell surfaces 13 limited.
- the central longitudinal axes of the partial fuel elements 14.1, 14.2, 14.3 are arranged in alignment with one another.
- the extension of the part-firing element 14.1, 14.2, 14.3 in the flow direction is the same in each case.
- Every part of the burner 14.1, 14.2, 14.3 is a specific service area of Assigned to the gas burner. Serve in a medium performance range, for example the partial fuel element 14.1 and partly also the partial fuel element 14.2 as a reaction zone.
- FIG. 4 illustrates an alternative embodiment to the burner body 10 3.
- the cylindrical partial fuel elements 14.1, 14.2, 14.3 different extensions in the direction of the flow of the gas-air mixture on.
- To an increased in the lower power range of the gas burner To be able to achieve variability in the temperature-volume load are two partial fuel elements 14.1, 14.2 are narrow.
- FIG. 5 shows a burner body 10 with a cylindrical shape.
- Burner body 10 can be connected via a feed line 15 and a distributor 16
- Fuel gas-air mixture can be introduced. This flows out of the distributor 16 in the porous burner body 10 and ignites here.
- the fuel gas-air mixture escapes from the distributor and flows into the burner body 10.
- the reaction zone is tight around the distributor 16 arranged around.
- the reaction zone extends at higher burner capacities also increasingly ring-shaped into the burner body 10.
- the Exhaust gases generated during combustion escape through the outer surface 13, which serves as the exhaust gas outlet surface 12.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pre-Mixing And Non-Premixing Gas Burner (AREA)
- Gas Burners (AREA)
Abstract
Description
- Fig. 1
- in schematischer Seitenansicht einen Brennerkörper mit stumpfkegelförmiger Geometrie,
- Fig. 2
- in schematischer Seitenansicht einen Brennerkörper mit teilweise stumpfkegelförmiger und teilweise zylindrischer Geometrie,
- Fig. 3
- in schematischer Seitenansicht einen Brennerkörper, der aus drei Teilbrennkörpern zusammengesetzt ist,
- Fig.4
- in schematischer Seitenansicht einen weiteren Brennerkörper der aus drei Teil-Brennkörpern zusammengesetzt ist und
- Fig. 5
- in perspektivischer Schemazeichnung einen scheibenförmigen Brennerkörper mit einer Zuleitung.
Claims (9)
- Gasbrenner mit einem Brennerkörper, der von einer porösen Struktur zumindest teilweise durchdrungen ist, und in dem ein Brenngas-Luftgemisch verbrennbar ist,
dadurch gekennzeichnet,daß sich die quer zur Strömungsrichtung des Brenngas-Luftgemisches verlaufende Querschnittsfläche der Reaktionszone des Brennerkörpers (10), in der die Verbrennung stattfindet, in Strömungsrichtung zumindest in einem Teilbereich des Brennerkörpers (10) vergrößert. - Gasbrenner nach Anspruch 1,
dadurch gekennzeichnet,daß sich die Querschnittsfläche der Reaktionszone kontinuierlich vergrößert. - Gasbrenner anch Anspruch 2,
dadurch gekennzeichnet,daß der Brennerkörper (10) eine stumpfkegelförmige Geometrie aufweist, unddaß die Eintritts-Querschnittsfläche (11), über die dem Brennerkörper (10) das Brenngas-Luftgemisch zuströmt, von der kleineren Kreisfläche des Brennerkörpers (10) gebildet ist. - Gasbrenner nach Anspruch 2,
dadurch gekennzeichnet,daß das Brenngas-Luftgemisch in den Brennerkörper (10) über eine Zuleitung (15) einleitbar und hier über einen, beispielsweise zylindrischen oder kugelförmigen Verteiler (16) in den Brennerkörper (10) abgebbar ist. - Gasbrenner nach Anspruch 1,
dadurch gekennzeichnet,daß sich die Querschnittsfläche der Reaktionszone über eine oder mehrere Stufensprünge vergrößert. - Gasbrenner nach Anspruch 5,
dadurch gekennzeichnet,daß der Brennerkörper (10) zwei oder mehrere zylindrische oder kreisscheibenförmige Teil-Brennerkörper (14.1, 14.2. ... 14.n) aufweist, die einen unterschiedlichen Durchmesser aufweisen, unddaß die Mittellängsachsen der Teil-Brennerkörper (14.1, 14.2 ... 14.n) zueinander fluchtend angeordnet sind. - Gasbrenner nach Anspruch 6,
dadurch gekennzeichnet,daß die Teil-Brennerkörper (14.1, 14.2 ... 14.n) in Strömungsrichtung des Brenngas-Luftgemisches unterschiedliche Dicken aufweisen. - Gasbrenner nach einem der Ansprüche 1 bis 7,
dadurch gekennzeichnet,daß sich die Querschnittsfläche der Reaktionszone teilweise kontinuierlich und teilweise über einen oder mehrere Stufensprünge vergrößert. - Verfahren zum Verbrenner eines Brenngas-Luftgemisches in einem Gasbrenner, wobei das Brenngas-Luftgemisch einem porösen Brennerkörper zugeleitet und in diesem verbrannt wird,
dadurch gekennzeichnet,daß bei einer niedrigen Brennerleistung des Gasbrenners eine höhere Temperatur-Volumenbelastung im Brennerkörper (10) erzeugt wird als bei einer höheren Brennerleistung.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19813896 | 1998-03-28 | ||
| DE19813896A DE19813896B4 (de) | 1998-03-28 | 1998-03-28 | Gasbrenner |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0947770A2 true EP0947770A2 (de) | 1999-10-06 |
| EP0947770A3 EP0947770A3 (de) | 2000-03-01 |
| EP0947770B1 EP0947770B1 (de) | 2003-10-08 |
Family
ID=7862764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99105813A Expired - Lifetime EP0947770B1 (de) | 1998-03-28 | 1999-03-23 | Gasbrenner |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0947770B1 (de) |
| DE (2) | DE19813896B4 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004016987A1 (de) * | 2002-07-23 | 2004-02-26 | Rational Ag | Porenbrenner sowie gargerät, enthaltend mindestens einen porenbrenner |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR471656A (fr) * | 1913-07-16 | 1914-11-06 | Gaz De Paris | Bruleur à gaz à combustion de surface |
| US1331022A (en) * | 1919-06-26 | 1920-02-17 | Mathy Maurice | Burner |
| DE2841105C2 (de) * | 1978-09-21 | 1986-10-16 | Siemens AG, 1000 Berlin und 8000 München | Vergasungsbrenner |
| JPS58124110A (ja) * | 1982-01-19 | 1983-07-23 | Matsushita Electric Ind Co Ltd | 燃焼装置 |
| JPS60243414A (ja) * | 1984-05-17 | 1985-12-03 | Matsushita Electric Ind Co Ltd | 燃焼装置 |
| JPH03241212A (ja) * | 1990-02-19 | 1991-10-28 | Toshiba Corp | 触媒燃焼装置 |
| US5147201A (en) * | 1990-11-19 | 1992-09-15 | Institute Of Gas Technology | Ultra-low pollutant emissions radiant gas burner with stabilized porous-phase combustion |
| DE9107108U1 (de) * | 1991-06-09 | 1991-08-01 | Braun Ag, 6000 Frankfurt | Beheizbares Gerät des persönlichen Bedarfs |
-
1998
- 1998-03-28 DE DE19813896A patent/DE19813896B4/de not_active Expired - Fee Related
-
1999
- 1999-03-23 DE DE59907249T patent/DE59907249D1/de not_active Expired - Fee Related
- 1999-03-23 EP EP99105813A patent/EP0947770B1/de not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004016987A1 (de) * | 2002-07-23 | 2004-02-26 | Rational Ag | Porenbrenner sowie gargerät, enthaltend mindestens einen porenbrenner |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0947770B1 (de) | 2003-10-08 |
| DE59907249D1 (de) | 2003-11-13 |
| DE19813896B4 (de) | 2005-12-29 |
| EP0947770A3 (de) | 2000-03-01 |
| DE19813896A1 (de) | 1999-09-30 |
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