EP0225467B1 - Brenner für flüssige und/oder gasförmige Brennstoffe - Google Patents

Brenner für flüssige und/oder gasförmige Brennstoffe Download PDF

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Publication number
EP0225467B1
EP0225467B1 EP86115025A EP86115025A EP0225467B1 EP 0225467 B1 EP0225467 B1 EP 0225467B1 EP 86115025 A EP86115025 A EP 86115025A EP 86115025 A EP86115025 A EP 86115025A EP 0225467 B1 EP0225467 B1 EP 0225467B1
Authority
EP
European Patent Office
Prior art keywords
cylinder
primary air
burner
burner according
air
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
Application number
EP86115025A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0225467A3 (en
EP0225467A2 (de
Inventor
Hermann-Josef Janssen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ingenieurbureau Sonvico AG
Original Assignee
Ingenieurbureau Sonvico AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ingenieurbureau Sonvico AG filed Critical Ingenieurbureau Sonvico AG
Publication of EP0225467A2 publication Critical patent/EP0225467A2/de
Publication of EP0225467A3 publication Critical patent/EP0225467A3/de
Application granted granted Critical
Publication of EP0225467B1 publication Critical patent/EP0225467B1/de
Expired legal-status Critical Current

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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 
    • F23C7/00—Combustion apparatus characterised by arrangements for air supply
    • F23C7/008—Flow control devices
    • 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

Definitions

  • the invention relates to a burner for liquid and / or gaseous fuels with the features of the preamble of claim 1 and a method for operating the burner.
  • a burner of the generic type is known from AT-B 358 702.
  • the air is divided in this burner by shut-off devices so that, depending on the load, only the cylinder or the guides are pressurized with air. If all air-guiding cross-sections are acted on at the same time, the combustion air could be supplied in stages to the generic burner, which leads to delayed combustion at a reduced flame temperature and has the effect of reducing the NO x content in the flue gas.
  • the invention has for its object to allow the combustion in the flame root to take place even more delayed by flue gas recirculation in a generic burner for the purpose of further reducing NO x formation.
  • the burner shown in Fig. 1 has a fuel lance 1 and lines 2-4 for primary air and secondary air.
  • One of these lines is designed as a cylinder 4, which is coaxial to the burner lance 1 and outside of it.
  • the cylinder 4 serves to guide the primary air.
  • Another part of the lines mentioned is in the form of tubes 3, which are located radially outside the cylinder 4 and are used to guide the secondary air. It is not apparent from the drawings that these tubes 3 lie on an annular path. This ring path is coaxial to the cylinder 4 and outside of it.
  • the tubes 3 are arranged evenly distributed over the circumference of the ring track and are spaced apart. It can also be seen from FIG.
  • the orifices 5 of the tubes 3 protrude beyond the cylinder orifice 6 in the flow direction of the primary and secondary air.
  • the primary air flowing in the burner is indicated by arrows 7, 8 and 9.
  • the secondary air flowing in the burner is indicated by an arrow 10.
  • the pitch circle diameter of the above-mentioned ring path on which the tubes 3 lie is greater than 1.2 times the diameter of the cylinder 4.
  • the ends 11 of the tubes 3 lying at the orifices 5 are surrounded by tube jackets 12 which are at a radial distance from one another the pipe ends 11 are.
  • the burner shown in Fig. 1 has an air inlet port 13.
  • the incoming air gives the primary and secondary air; a subdivision is only made after the inlet connection 13.
  • In the inlet connection 13 there is a throttle 14 for regulating all the air forming the primary air and secondary air.
  • the cylinder 4 is surrounded by a control tube 15 which is axially displaceable on the cylinder 4 via an actuating rod 16.
  • the components 15-17 thus represent an adjusting device for regulating the primary air.
  • the primary air flowing in the direction of arrow 7 is conducted differently in cylinder 4.
  • Part of the primary air flows in the direction of arrow 8 through swirl vanes 19, through which the primary air passing through is set in rotation.
  • Another part of the primary air flows in a straight line through the cylinder 4 in the direction of the arrow 9.
  • the swirl vanes 19 are present in an air guide 20 known per se.
  • the fuel lance 1 has a mouth 21. It is known to adjust the air guide 20 axially relative to the mouth 21 of the fuel lance 1; the adjustment device available for this is not shown.
  • the burner shown in Fig. 1 has no adjustment device for regulating the secondary air.
  • liquid fuel is burned, it is only fed to the burner via the burner lance 1. If, on the other hand, gaseous fuel is burned, it is also passed over a fuel lance 1, but additionally over a nozzle assembly 22, of which only one line is shown in FIG. 1. All lines of the nozzle assembly 22 lie on an annular path which is concentric with the fuel lance 1. This arrangement of the nozzle assembly 22 is also known.
  • the liquid or gaseous fuel emerges from the fuel lance 1 in the direction of spray jets 24.
  • the secondary air emerging from the tubes 3 flows out of the tube mouth 5 in the direction of a jet 25 at a much higher speed than the primary air emerging from the cylinder 4 at the mouth.
  • this burner according to FIG. 2 also has tubes 3 ′ lying on an annular path for guiding the secondary air in the direction of arrow 10.
  • a separate inlet connection piece 26 is used to supply the secondary air to the burner.
  • An inlet connection 28 is used to supply the primary air to the burner.
  • the burner has a cylinder 4 ', to which a cone 29 is connected upstream.
  • the cylinder 4 ' in turn serves to guide the primary air.
  • Coaxially and inside the cylinder 4 ' is a channel 30 which is coaxial with the burner lance 1' and outside of it.
  • the primary air flowing in via the inlet connection 28 is divided into a first primary air flow 31 in the channel 30 and a second primary air flow 32 in the cylinder 4 '.
  • the second primary air flow 32 flows partially through the swirl vane 19 'and is thereby set in rotation. Another part of this second primary air flow, however, flows in the direction of an arrow 33 straight to the mouth 6 'of the cylinder 4'.
  • the first primary air flow 31 in the channel 30 likewise flows partially through the swirl vane 19 ', whereas another part of the first primary air flow flows unhindered towards the mouth 6' in the direction of an arrow 34.
  • first primary air flow 31 can be regulated by means of an axially displaceable adjusting device 35 and 36.
  • a throttle 37 in the inlet connection 28 for regulating the amount of primary air.
  • the burner according to FIG. 2 in turn has a plurality of lines 22 ′ of a nozzle assembly lying on an annular path.
  • a flame contour 41 is shown in dash-dot lines in the burner according to FIG.
  • the flame root lies in the area of the mouth 21 'of the fuel lance 1'.
  • the aim is to make the flame temperature even over the entire flame area (from the flame root to the end of the flame). It would be ideal if the temperature did not rise above 1300 ° over the entire flame area, since the NOx from the atmospheric nitrogen only occurs above this temperature.
  • the tube ends 11 ' are each of a coaxial tube jacket! 12 'surrounded.
  • the pipe jackets 12 ' are at a distance from the cylinder mouth 6'. Since, as mentioned, the secondary air emerging from the tube ends 11 'flows at a much higher speed than the primary air emerging at the mouth 6' in the direction of the flame, the secondary air flows lying on an annular path and emerging from the tube ends 11 'act as a jet pump for the Flame contour 41 surrounding flue gas in space 43, which is thereby recirculated in the direction of arrows 44 and which is applied to the flame contour 41 as an inert gas jacket 45. Due to this inert flue gas jacket 45, the secondary air jacket 46 arrives at the flame with a delay, so that the desired delayed combustion takes place.
  • each pipe end 11 or 11 ' is surrounded by a pipe jacket 12 or 12' which is provided as a pipe section.
  • a first pipe jacket could be located within all pipe ends 11 and 11 ', and outside of all these pipe ends, also at a distance from them, there could be a second pipe jacket, the first and the second pipe jacket being coaxial to one another .
  • the embodiment shown, in which each tube end is surrounded by a tube jacket at a distance, is preferred, however, since this embodiment allows a higher heat resistance to be expected.
  • the burner according to FIG. 2 can be operated, for example, in such a way that the primary air at a temperature of, for example, 300 ° is input via the connector 28, whereas cold secondary air is input via the connector 26.
  • the first primary air flow 31 flowing in the channel 30 can be of the order of magnitude of 10-20% of the total combustion air.
  • the second primary air stream flowing in the cylinder 4 ' can be of the order of magnitude of 20-50% of the total combustion air.
  • the secondary air entering through the nozzle 26 can be in the range of 30-40% of the total combustion air.
  • the burner shown in FIGS. 1 and 2 can be referred to as a step burner, in which, due to the staged combustion air supply to the flame, a delayed combustion occurs with a low combustion temperature.
  • This measure of the gradual supply of combustion air to the flame and the possible addition of external flue gas via the connector 38 to the secondary air and the suction of internal flue gas, i.e. the flue gas surrounding the flame, and supply of this flue gas as a protective jacket to the flame, ensures that the NOx content is reduced to the combustion of liquid and / or gaseous fuels is significantly reduced.
  • liquid and gaseous fuel can also be burned at the same time.

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)
EP86115025A 1985-11-28 1986-10-29 Brenner für flüssige und/oder gasförmige Brennstoffe Expired EP0225467B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3541987 1985-11-28
DE19853541987 DE3541987A1 (de) 1985-11-28 1985-11-28 Brenner fuer fluessige und/oder gasfoermige brennstoffe

Publications (3)

Publication Number Publication Date
EP0225467A2 EP0225467A2 (de) 1987-06-16
EP0225467A3 EP0225467A3 (en) 1988-08-31
EP0225467B1 true EP0225467B1 (de) 1989-12-20

Family

ID=6287023

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86115025A Expired EP0225467B1 (de) 1985-11-28 1986-10-29 Brenner für flüssige und/oder gasförmige Brennstoffe

Country Status (2)

Country Link
EP (1) EP0225467B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (2) DE3541987A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3825291A1 (de) * 1988-07-26 1990-02-01 Ver Kesselwerke Ag Verfahren und feuerungsanlage zur verbrennung fossiler brennstoffe unter reduzierter bildung von stickoxiden
SE464542B (sv) * 1989-11-01 1991-05-06 Aga Ab Saett och anordning foer foerbraenning av foeretraedesvis flytande eller gasformigt fossilt braensle
DE102007006243A1 (de) * 2007-02-08 2008-08-14 Messer Austria Gmbh Brenner
CN106594722A (zh) * 2016-11-04 2017-04-26 北京航天石化技术装备工程有限公司 一种底部低氮氧化物燃气燃烧器
CN107559822B (zh) * 2017-09-21 2020-06-09 哈尔滨工业大学 中心给粉旋流煤粉燃器和燃尽风布置结构
RU2769616C2 (ru) * 2018-12-25 2022-04-04 Ансальдо Энергия Свитзерленд Аг Инжекционная головка для камеры сгорания газовой турбины

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT358702B (de) * 1975-01-27 1980-09-25 Manich Leo Wirbelbrenner fuer oel- und/oder gasbetrieb
DE3040830C2 (de) * 1980-10-30 1990-05-31 L. & C. Steinmüller GmbH, 5270 Gummersbach Verfahren zur Verminderung der NO↓X↓ -Emission bei der Verbrennung von stickstoffhaltigen Brennstoffen
DE3048201A1 (de) * 1980-12-20 1982-07-08 L. & C. Steinmüller GmbH, 5270 Gummersbach "brenner zur verminderung der no(pfeil abwaerts)x(pfeil abwaerts)-emission"

Also Published As

Publication number Publication date
EP0225467A3 (en) 1988-08-31
DE3541987C2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1989-03-30
EP0225467A2 (de) 1987-06-16
DE3667719D1 (de) 1990-01-25
DE3541987A1 (de) 1987-06-04

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