EP0655580B1 - Mischeinrichtung für Öl- und Gasbrenner - Google Patents
Mischeinrichtung für Öl- und Gasbrenner Download PDFInfo
- Publication number
- EP0655580B1 EP0655580B1 EP94118271A EP94118271A EP0655580B1 EP 0655580 B1 EP0655580 B1 EP 0655580B1 EP 94118271 A EP94118271 A EP 94118271A EP 94118271 A EP94118271 A EP 94118271A EP 0655580 B1 EP0655580 B1 EP 0655580B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tube
- mixing
- mixing device
- oil
- flame
- 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
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
- F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
- F23C9/006—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber the recirculation taking place in the combustion chamber
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
- F23D11/36—Details, e.g. burner cooling means, noise reduction means
- F23D11/40—Mixing tubes or chambers; Burner heads
-
- 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
- F23D14/62—Mixing devices; Mixing tubes
Definitions
- the invention relates to a mixing device for oil or gas burners with a mixing tube with a front passage opening, one in the direction of flow arranged upstream of the passage opening, annular baffle plate with a passage opening of the mixing tube pointing cylindrical jacket and at least one nozzle and at least one ignition electrode, the cylindrical jacket at the passage opening is provided on the outside with a cone End margin with a smaller diameter at least approximately, preferably exactly in the plane of the passage opening of the mixing tube.
- the object of the invention is a mixing device to improve this kind in such a way that low NOx formation.
- Nitrogen oxides are created in all combustion processes, where fossil fuels are burned. she occur in the flame and the immediate high temperature zone on. The formation occurs through partial oxidation the molecular nitrogen of the combustion air, as well as any chemically bound in the fuel (organic) nitrogen. So there are two sources responsible for the formation of nitrogen monoxide, the reaction media gases and flame front to three different nitrogen monoxide formation mechanisms to lead.
- thermal NO which comes from molecular nitrogen N2 arises in the combustion air above 1300 ° C; second, prompt NO through the reaction of hydrocarbon radical Cx with oxygen; and thirdly NO fuel from the atomic bound in heating oil Nitrogen.
- Oil and gas fires are primarily thermal NOx consisting of approx. 95% NO and 5% NO2. At Temperatures below 600 ° C and oxidized in the atmosphere the NO to NO2, therefore the emission values are given as NO2 calculated.
- the internal flue gas recirculation is by no means today solved satisfactorily. Since the internal Flue gas recirculation no additional fan available is available with a much lower one Force, in this case the air injector, the fuel processed and flue gas added. (In the external flue gas recirculation is required by the Flue gas blower approx. 30% more electricity required).
- the aim of the invention is to remedy the previous ones Starting problems and increasing the previously lacking Operational safety.
- the object of the invention is achieved in that the cylindrical jacket protrudes from the mixing tube, the end edge of the cone or the inner tube in the flow direction upstream of the end edge of the cylindrical shell and that the ring-shaped baffle plate with radial slots is.
- the core fire zone is yellow. Be in this area approx. 10 to 30% of the fuel burned due to lack of air. Due to the hollow cone characteristics of the Oil nozzle only becomes part of the oil drops with the core combustion air in the core area of the mixing device burned.
- the gasification zone / main flame is blue. Through the kinetic Energy from the oil drops reach 70 to 90% of the Drops of oil unburned to the outside through the core fire zone, where through the recirculation of hot flue gases gasified and mixed with the combustion air become. This gasified and mixed with air and flue gas Fuel has very poor ignition properties and would become unstable without the stabilizing core flame burn.
- the gasification temperature can be reduced by recirculating the flue gases being controlled.
- the situation with a gas burner is as follows: There gas is already supplied to the burner Gasification zone. It is again between stable Distinguished between core flame and unstable main flame.
- the core flame ensures that the bad ignitable mixture of fuel, air and flue gas stable and clean burning.
- the fuel gas is in the Area of the gas lances intensely and evenly with the Combustion air mixed. This even mixing has the advantage that in all operating states there is no CO formation in the exhaust gases. Even Mixing air and gas has the advantage that the Burnout is largely CO-free, the ease of ignition this mixture is worse.
- a gas-air mixture is the most ignitable with a certain lack of air.
- the essence of the present invention is the position the baffle plate and the air inlet control edge.
- the novel Baffle plate with the additional cone and rectangular control edge a negative pressure in the area between the end flange of the mixing tube and the Recirculation pipe generates, on the one hand, the flue gas is mixed in and on the other hand the fuel pressed outwards into this vertebral area and intense is mixed.
- FIG. 1 shows a longitudinal section through an inventive Mixing device of an oil blowing burner
- 2 shows a same longitudinal section through a Mixing device of a gas fan burner
- FIG. 3 shows a longitudinal section through the front area of a Oil mixing device according to a further embodiment of the invention
- Fig. 4 shows a Front view of this oil mixing device
- FIGS. 5 to 8 show the same views as FIGS. 3 and 4 according to FIG further embodiments of an oil mixing device
- Figs. 9 to 14 show the same views as 3 and 4 according to further embodiments various gas mixing devices.
- the mixing device according to the invention has a mixing tube 1 on.
- the mixing tube 1 is facing the flame End provided with a front passage 3.
- the pressure atomizing nozzle 4 can be from a nozzle assembly 6 be worn, provided with an oil preheater is.
- the pressure atomizing nozzle 4 is in a cone-like Nozzle chamber 8.
- the nozzle chamber 8 has one cylindrical section 9 on one side from an end wall 13 and on the other side of a frustoconical area 14 is limited.
- Two ignition electrodes 29 protrude through wall 13 Wall 13 can with additional burner capacities for large burner capacities be provided to a throttled air supply to allow. In general, however, is the nozzle chamber 8 closed except for the passage 15.
- the nozzle chamber 8 lies directly with its opening 15 on the baffle plate 10.
- the baffle plate 10 is annular and has at the pressure atomizer nozzle 4th facing away from a cylindrical jacket 11.
- the cylindrical shell 11 can be slit-shaped Openings 33 may be provided, preferably along Generating the cylindrical shell 11 extend.
- baffles 34 by pressing the material have arisen.
- Next to the slots 12 are punched out Baffles 30, which on the atomizer nozzle 4 Cantilever the opposite side of the baffle plate 10.
- the Baffles 30 are preferably at an angle of ⁇ 30 ° inclined to the plane plane of the baffle plate 10. That the baffles 30 to the flame and not to Cantilever pressure atomizer nozzle 4 is manufacturing technology advantageous, but also brings fluidic Advantages.
- the nozzle chamber 8 is at its tip end with the Baffle plate 10 soldered or welded.
- the nozzle chamber 8 is frustoconical Area 14 with a pilot air duct or pilot air holes Mistake.
- the cone becomes conical Section 7 'of an inner tube 7 is formed.
- the conical section 7 'lies directly with its edge 18 on the cylindrical jacket 11 and is with this soldered or welded.
- the point of contact of the conical section 7 'of the inner tube 7 with the cylindrical jacket 11 is in the embodiment shown exactly in the plane of the outlet opening 3 of the mixing tube 1.
- a tolerance range in which the edge 18 of the conical section 7 'in front of or behind the Level of the outlet opening 3 is in the range of Invention idea.
- the cylindrical jacket 11 protrudes out of the mixing tube 1 via the outlet opening 3 out.
- the inner tube 7 has a cylindrical input side Section 7 "up to the nozzle opening 19 withdrawn end of the pressure atomizer nozzle 4 withdrawn is.
- the inner tube 7 borders with the cylindrical Jacket 11 of the baffle plate 10 from an annular gap 5.
- a full cone can also be used surround the cylindrical jacket 11 of the baffle plate 10.
- the pressure atomizing nozzle 4 projects into the inner tube 7.
- the flame tube 17 can be made from a perforated plate be.
- the recirculation pipe 2 with an electrical resistance heater 31 provided.
- FIG. 2 there is a mixing device for a gas fan burner with several Gas nozzles 25, 26 shown.
- the gas nozzle in the middle 25 protrudes through the baffle plate 10 into the core fire zone 23 in.
- the outer gas nozzles 26 surround the inner tube 7 and end at the level of the cylindrical section 7 "of the inner tube 7.
- the ignition electrodes 29 protrude through the baffle plate 10 into the core fire zone 23.
- the construction of the mixing device is the same the mixing device according to FIG. 1.
- a part of the gas-air mixture is directly in from the nozzle 25 the core fire zone 23 out.
- the gas from the nozzles 26 and the air that mixes with it is removed by the from the flange 16 and from the conical section 7 'of Inner tube 7 or the cylindrical wall 11 of the Baffle plate 10 limited outflow opening 3 of the mixing tube 1 led.
- the core fire zone also burns when gas is burned blue.
- the show a mixer for an oil atomizer burner are radially arranged in the end flange 16, one-sided Open slots 27 are provided so that the edge of the Outlet opening 3 is designed like a rack.
- FIGS. 5 and 6 also a mixing device for an oil burner, 16 holes 28 are provided in the flange, the one Circular ring with a smaller diameter than the flame tube 17 describe.
- the same describes a mixing device for an oil burner, are in the flange 16 of the mixing tube 1 nozzle tubes 20 arranged to the longitudinal central axis of the Mixing device are inclined.
- FIGS. 9 and 10 relate to mixing devices for a gas burner.
- the flange 16 of the mixing tube 1 in turn with radially aligned slots open inwards 27 and in the exemplary embodiment according to FIG. 11 and 12 has the flange 16 which is in a flat plane lies, holes 28 on.
- FIGS. 13 and 14 are on Flange 16, which in turn lies in a flat plane, the perpendicular to the longitudinal central axis of the mixing device is aligned, nozzle pipes 20 are provided, which however, extend parallel to the longitudinal axis of the mixing device.
- the one described by the nozzle tubes 20 The circular ring in turn has a smaller diameter than the flame tube 17.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gas Burners (AREA)
Description
Öl > 140 mg/kWh
Gas > 100 mg/kWh
Öl < 120 mg/kWh
Gas < 80 mg/kWh
- mangelnde Betriebssicherheit
- schlechtes Zündverhalten und dadurch Brennerstörungen (15.000 Starts im Jahr)
- die Schadstoffe wie Co und Cx Hy betragen in der Kaltstartphase das ca. 10 bis 20fache eines herkömmlichen Öl-Brenners.
Herkömmliche Ölbrenner haben eine gelbe Flammenfarbe. Mit diesen Gelb flammen kann die geforderte NOx-Reduzierung nicht erreicht werden, da die Ausbrandzeit zu lange dauert. Die thermische NOx-Bildung hängt nämlich von der Temperatur und der Zeit ab. Es müssen also Systeme entwickelt werden, bei denen das Öl vorher vergast wird. Vergastes Öl hat eine kürzere Ausbrandzeit. Die Energie zur Vergasung des öles soll sinnvollerweise nicht durch zusätzliche Elektroenergie, sondern durch die eigene Flammentemperatur geliefert werden. Das Problem liegt nun darin, daß beim Start keine bzw. zuwenig Wärme vorhanden ist, um das öl zu vergasen. Die Folge ist ein unsicherer und unsauberer Start. Es gibt Blaubrenner bereits am Markt, aber die Startphase ist nicht zufriedenstellend gelöst.
Claims (6)
- Mischeinrichtung für Öl- oder Gasbrenner mit einem Mischrohr (1) mit einer stirnseitigen Durchlaßöffnung (3), einer in Strömungsrichtung stromaufwärts vor der Durchlaßöffnung angeordneten, ringförmigen Stauscheibe (10) mit einem zur Durchlaßöffnung des Mischrohres weisenden zylindrischen Mantel (11) sowie mindestens einer Düse (4) und mindestens einer Zündelektrode (29), wobei der zylindrische Mantel bei der Durchlaßöffnung außen mit einem Konus versehen ist, dessen Abschlußrand mit kleinerem Durchmesser zumindestens annähernd, vorzugsweise exakt in der Ebene der Durchlaßöffnung des Mischrohres liegt, dadurch gekennzeichnet, daß der zylindrische Mantel (11) aus dem Mischrohr (1) hinausragt, wobei der Abschlußrand (18) des Konusses bzw. des Innenrohres (7) in Strömungsrichtung stromaufwärts vor dem Abschlußrand (32) des zylindrischen Mantels (11) liegt und daß die ringförmige Stauscheibe (10) mit radialen Schlitzen (12) versehen ist.
- Mischeinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der zylindrische Mantel (11) mit vorzugsweise schlitzförmigen Durchbrechungen (33) versehen ist.
- Mischeinrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die schlitzförmigen Durchbrechungen (33) entlang Erzeugenden des zylindrischen Mantels (11) verlaufen.
- Mischeinrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß im Flammbereich vor dem Mischrohr (1) ein äußeres Rezirkulationsrohr (2) und ein inneres Flammrohr (17) angeordnet sind, wobei das Flammrohr (17) von einem Lochblech gebildet wird.
- Mischeinrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß das Mischrohr (1) einen Abschlußflansch (16) aufweist, der mit radialen, einseitig offenen Schlitzen (27) versehen ist.
- Mischeinrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß mehrere Gasdüsen (25, 26) vorgesehen sind, von denen mindestens eine in Strömungsrichtung bis zur Flammseite der Stauscheibe (10) ragt.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT2409/93 | 1993-11-29 | ||
AT0240993A AT400259B (de) | 1993-11-29 | 1993-11-29 | Mischeinrichtung für öl- oder gasbrenner |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0655580A2 EP0655580A2 (de) | 1995-05-31 |
EP0655580A3 EP0655580A3 (de) | 1995-11-15 |
EP0655580B1 true EP0655580B1 (de) | 1999-01-27 |
Family
ID=3533832
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94118271A Expired - Lifetime EP0655580B1 (de) | 1993-11-29 | 1994-11-21 | Mischeinrichtung für Öl- und Gasbrenner |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0655580B1 (de) |
AT (2) | AT400259B (de) |
DE (1) | DE59407736D1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004002246A1 (de) * | 2004-01-15 | 2005-08-11 | J. Eberspächer GmbH & Co. KG | Vorrichtung zur Erzeugung eines Luft/Kohlenwasserstoff-Gemischs |
DE102009057120A1 (de) | 2009-12-08 | 2011-06-09 | Scheer Heizsysteme & Produktionstechnik Gmbh | Mischeinrichtung für einen Zerstäubungsbrenner |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0699867A3 (de) * | 1994-09-03 | 1996-09-11 | Johannes Wilhelmus Graat | Brennereinrichtung für einen gasartigen Brennstoff |
DE19531387C2 (de) * | 1995-08-26 | 2001-06-28 | Man B & W Diesel Ag | Verfahren zum Verbrennen insbesondere flüssiger Brennstoffe und Brenner zur Durchführung des Verfahrens |
EP0864812A3 (de) * | 1997-03-12 | 1999-06-16 | A. Schwarz + Co. | Mischeinrichtung für Gas- und Ölbrenner |
EP0867659A1 (de) | 1997-03-24 | 1998-09-30 | VTH Verfahrentechnik für Heizung AG | Verfahren und Vorrichtung zur Verbrennung von gasförmigem Brennstoff |
EP0867658B1 (de) | 1997-03-24 | 2000-11-29 | VTH AG Verfahrenstechnik für Heizung | Verfahren und Vorrichtung zur Verbrennung von flüssigem Brennstoff |
DE59802337D1 (de) | 1997-03-24 | 2002-01-17 | Vth Ag | Mit einem brenner ausgerüsteter heizkessel |
AT407911B (de) * | 1998-03-05 | 2001-07-25 | Vaillant Gmbh | Atmosphärischer teilvormischender gasbrenner |
WO2000020799A1 (en) * | 1998-10-08 | 2000-04-13 | Huta Buczek S.A. | Combustion stabilizing system in a gas burner of low nitrogen oxides emission |
DE29912362U1 (de) * | 1999-07-15 | 2001-01-11 | Viessmann Werke GmbH & Co., 35108 Allendorf | Blaubrenner für Heizkessel |
DE10202600B4 (de) * | 2002-01-24 | 2005-10-27 | Eisenmann Maschinenbau Gmbh & Co. Kg | Gasbrenner |
WO2004048850A2 (en) * | 2002-11-22 | 2004-06-10 | Aalborg Industries A/S | A boiler, a method of controlling the combustion in a boiler and a heat exchanger tube for use in a boiler |
CN107606611A (zh) * | 2017-09-28 | 2018-01-19 | 湖南安盛能源化工有限责任公司 | 一种节能型醇基燃料燃烧机 |
CN114234186B (zh) * | 2021-12-06 | 2023-09-29 | 北京航天石化技术装备工程有限公司 | 一种双引射式燃气分级超低氮燃烧器 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2228719A1 (de) * | 1972-06-13 | 1974-01-03 | Unger Ladislaus | Vorrichtung zur gemischaufbereitung fuer oel-druckzerstaeuber-brenner |
DE2545234C2 (de) * | 1975-10-09 | 1983-09-15 | Fa. J. Eberspächer, 7300 Esslingen | Mischeinrichtung für Brenner |
DE2757094A1 (de) * | 1977-12-21 | 1979-07-05 | Anton Schwarz | Misch- und brennkopf fuer heizoelbrenner kleiner leistungen |
DE2807186C2 (de) * | 1978-02-20 | 1986-03-20 | Bieler & Lang GmbH, 7590 Achern | Mischkopf für Kohlenwasserstoff-, insbesondere Heizöl-Brenner, mit kleinen Brennstoffdurchsatzmengen |
DE2821932A1 (de) * | 1978-05-19 | 1979-11-22 | Karl Bodemer | Mischeinrichtung zur verbrennung von fluessigen kohlenwasserstoffen, insbesondere heizoel und dieseloel |
JPS5837413A (ja) * | 1981-08-28 | 1983-03-04 | Nissei Oobaru Kk | 液体燃焼装置 |
FR2582781A1 (fr) * | 1985-06-04 | 1986-12-05 | Mueller Rudolf | Bruleur pour chaudiere a combustion liquide avec circuit de recyclage des gaz de combustion |
CH670297A5 (de) * | 1986-02-13 | 1989-05-31 | Schilling Siegfried W | |
DE3636787A1 (de) * | 1986-10-29 | 1988-05-19 | Man Technologie Gmbh | Brenner mit einer oelzerstaeubervorrichtung |
DE3709830A1 (de) * | 1987-03-25 | 1988-10-06 | Gerhard Weinbrenner | Brennrohr fuer insbesondere oelbeheizte zentralheizungskessel |
DE4021315C1 (en) * | 1990-07-04 | 1992-01-02 | Buderus Heiztechnik Gmbh | Oil burner with blue frame - incorporates baffle ring on inside of tube outlet |
DE4231788A1 (de) * | 1992-09-23 | 1994-03-24 | Koerting Ag | Brenner für flüssige oder gasförmige Brennstoffe |
-
1993
- 1993-11-29 AT AT0240993A patent/AT400259B/de not_active IP Right Cessation
-
1994
- 1994-11-21 DE DE59407736T patent/DE59407736D1/de not_active Expired - Fee Related
- 1994-11-21 AT AT94118271T patent/ATE176309T1/de not_active IP Right Cessation
- 1994-11-21 EP EP94118271A patent/EP0655580B1/de not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004002246A1 (de) * | 2004-01-15 | 2005-08-11 | J. Eberspächer GmbH & Co. KG | Vorrichtung zur Erzeugung eines Luft/Kohlenwasserstoff-Gemischs |
DE102009057120A1 (de) | 2009-12-08 | 2011-06-09 | Scheer Heizsysteme & Produktionstechnik Gmbh | Mischeinrichtung für einen Zerstäubungsbrenner |
Also Published As
Publication number | Publication date |
---|---|
EP0655580A3 (de) | 1995-11-15 |
EP0655580A2 (de) | 1995-05-31 |
ATE176309T1 (de) | 1999-02-15 |
AT400259B (de) | 1995-11-27 |
DE59407736D1 (de) | 1999-03-11 |
ATA240993A (de) | 1995-03-15 |
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