EP0908670B1 - Vorrichtung zum Betreiben eines atmosphärischen Gasbrenners - Google Patents
Vorrichtung zum Betreiben eines atmosphärischen Gasbrenners Download PDFInfo
- Publication number
- EP0908670B1 EP0908670B1 EP19980118621 EP98118621A EP0908670B1 EP 0908670 B1 EP0908670 B1 EP 0908670B1 EP 19980118621 EP19980118621 EP 19980118621 EP 98118621 A EP98118621 A EP 98118621A EP 0908670 B1 EP0908670 B1 EP 0908670B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- nozzle
- gas
- fuel
- gas burner
- central nozzle
- 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.)
- Expired - Lifetime
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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
- F23D14/60—Devices for simultaneous control of gas and combustion air
Definitions
- the invention is based on a device for operating an atmospheric Gas burner according to the upper handle of claim 1.
- a known gas burner of this type is known from EP 657 693 A2.
- the atmospheric gas burner known from EP 657 693 A2 is a central main nozzle assigned a second, external secondary nozzle, which is inclined in the jet of Main nozzle is directed.
- the inclined auxiliary nozzle also turns fuel into injected the main jet, with both the main nozzle and the secondary nozzle are fed by a common gas flow and only by means of the main nozzle a closure element is controllable.
- the invention Device allows a simple Variation of the air-fuel ratio leading to Compensation for changes in the fuel-air ratio over the modulation range and / or to adjust the Gas burner on different fuels without changing the nozzle can be used. Furthermore, the arrangement according to the invention from a simple structure, that works without moving parts.
- the distribution of the total flow of fuel gas into one Centrally aligned with respect to the mixing tube opening Part gas flow and at least one other non-central aligned partial gas flow takes place via the set or required burner capacity by Keeping the fuel-air ratio constant above that entire modulation range of the gas burner a central Nozzle is provided for a maximum required Combustion air intake at nominal load of the Gas burner is designed while an outer nozzle is provided is the minimum combustion air intake required is designed in the partial load range of the gas burner.
- the gas supply takes place in such a way that with decreasing Burner load an increasingly larger proportion of the supplied fuel passes through the outer nozzle while the partial gas flow emerging through the central nozzle is reduced. Because the relationship between burner performance and air ratio ⁇ especially with atmospheric burners low pollution tendency is fixed, the Distribution of the partial gas flows in a characteristic curve or Characteristic family of curves stored in the control unit of the heater become.
- the presence of two separately controllable Fuel supplies to the injector system can be advantageous also for a temporary enrichment of the fuel-air mixture be used when the gas burner is cold started.
- Figure 1a shows that Injector system of the gas burner with the nozzle system in the Section and the entrance area of the mixing tube in Side view
- Fig. 1b an alternative embodiment of a Gas supply
- Fig. 1c an alternative embodiment of the Nozzle system.
- the injector system a central nozzle 10 with a circular cross-section, from a Ring nozzle 12a is surrounded concentrically.
- the ring nozzle 12a has a larger outlet cross section than the central nozzle 10 and is opposite this in the flow direction of the Axially set fuel.
- the central nozzle 10 is made from a gas manifold 18 fed, which the fuel via a control valve 20th is fed.
- the ring nozzle 12a is with a Gas manifold 22 connected into which the fuel a control valve 24 arrives.
- the control valves 20 and 24 that are charged with the same gas are on a Control unit 26 of a combustion control device connected, which depends on the fuel gas supply on the load status of the gas burner and / or the one used Gas type distributed to the two nozzles 10 and 12a.
- Fig. 1b is a second alternative embodiment of the gas supply shown. Under The two are maintaining double security Valves for the gas distribution pipes 18, 22 in this case as combined safety / control valves 32, 34 are formed, which together is preceded by a safety valve 36.
- Control unit 26 Due to their larger outlet cross-section the air intake deteriorates, causing the basic increase in air ratio at low load counteracted and the desired fuel-air ratio is kept constant.
- Such control of Gas supply can be in a characteristic curve or family of curves in the Control unit 26 are stored.
- the outer nozzle instead of the ring nozzle 12a Individual nozzles arranged radially to the central nozzle 10 or Single holes 12b used.
- the sum of the Exit cross sections of the individual nozzles 12b is also larger than the outlet cross section of the central nozzle 10.
- the individual nozzles 12b are like that Embodiment according to Figure 1a compared to the central Nozzle 10 axially in the direction of flow of the fuel set back. The distribution of the gas flows can on the same way as the first Embodiment.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Regulation And Control Of Combustion (AREA)
Description
Claims (4)
- Atmosphärischer Gasbrenner für ein Heizgerät, insbesondere mit Vollvormischung von Brennstoff und Luft, bei dem ein Injektorsystem mit Mitteln zum Beeinflussen der Ansaugcharakteristik und damit des Brennstoff-Luftverhältnisses versehen ist, das eine kombinierte Anordnung von einer zentralen Düse (10) und wenigstens einer zweiten Außendüse (12a, 12b) aufweist, wobei der Austrittsquerschnitt der zentralen Düse (10) kleiner ist als der Austrittsquerschnitt bzw. die Summe der Austrittsquerschnitte der Außendüse (12a, 12b) und wobei die Austrittsöffnung der Außendüse (12a, 12b) gegenüber der zentralen Düse (10) axial zurückversetzt ist, dadurch gekennzeichnet, dass die Außendüse als eine konzentrisch zur zentralen Düse (10) angeordnete Ringdüse (12a) ausgebildet ist und dass die Steuerung der Gaszufuhr zur zentralen Düse (10) und zur Außendüse (12) über zwei Regelventile (20, 24) erfolgt, wobei zur Einstellung eines vorgegebenen Brennstoff-Luftverhältnisses der zentral ausgerichtete Teilgasstrom mit zunehmender Brennerbelastung vergrößert wird und umgekehrt, während der nichtzentral ausgerichtete Teilgasstrom in Abhängigkeit von der während der Verbrennung erfassten Luftzahl λ bestimmt wird.
- Gasbrenner nach Anspruch 1, dadurch gekennzeichnet, dass den zwei Regelventilen (20, 24) gemeinsam zwei Sicherheitsventile (28, 30) vorgeschaltet sind.
- Gasbrenner nach Anspruch 1, dadurch gekennzeichnet, dass die Regelventile zwei kombinierte Sicherheits/Regelventile (32, 34) sind, denen gemeinsam ein Sicherheitsventil (36) vorgeschaltet ist.
- Gasbrenner nach Anspruch 1, dadurch gekennzeichnet, dass die Aufteilung der Brennstoffzufuhr auf die zentrale Düse (10) und auf die Außendüse (12a,12b) eine vorübergehende Anfettung des Brennstoff-Luftgemisches bei Kaltstart des Gasbrenners vorsieht.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19744082 | 1997-10-06 | ||
DE19744082 | 1997-10-06 | ||
DE19810750A DE19810750A1 (de) | 1997-10-06 | 1998-03-12 | Verfahren und Vorrichtung zum Betreiben eines atmosphärischen Gasbrenners |
DE19810750 | 1998-03-12 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0908670A1 EP0908670A1 (de) | 1999-04-14 |
EP0908670B1 true EP0908670B1 (de) | 2004-07-28 |
Family
ID=26040616
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19980118621 Expired - Lifetime EP0908670B1 (de) | 1997-10-06 | 1998-10-01 | Vorrichtung zum Betreiben eines atmosphärischen Gasbrenners |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP0908670B1 (de) |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB230149A (en) * | 1923-11-29 | 1925-03-02 | George Helps | Improvements in gas burners |
CH314202A (de) * | 1952-04-03 | 1956-05-31 | Schweiz Gasapparatefabrik Solo | Regulierbarer Gasbrenner mit mehreren sukzessive zueinander parallel schaltbaren Gasaustrittsdüsen |
DE3829664C1 (de) * | 1988-09-01 | 1990-01-18 | Karl Dungs Gmbh & Co, 7060 Schorndorf, De | |
AT399382B (de) | 1993-03-11 | 1995-04-25 | Vaillant Gmbh | Atmosphärischer vormisch-gasbrenner |
DE4341997A1 (de) * | 1993-12-09 | 1995-06-14 | Gogas Goch Gmbh & Co | Gasbrenner |
-
1998
- 1998-10-01 EP EP19980118621 patent/EP0908670B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0908670A1 (de) | 1999-04-14 |
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