EP0670454B1 - Braunkohlenbrenner - Google Patents
Braunkohlenbrenner Download PDFInfo
- Publication number
- EP0670454B1 EP0670454B1 EP94120182A EP94120182A EP0670454B1 EP 0670454 B1 EP0670454 B1 EP 0670454B1 EP 94120182 A EP94120182 A EP 94120182A EP 94120182 A EP94120182 A EP 94120182A EP 0670454 B1 EP0670454 B1 EP 0670454B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- burner
- segments
- mouth
- air
- fuel
- 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
- F23D—BURNERS
- F23D1/00—Burners for combustion of pulverulent fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2201/00—Burners adapted for particulate solid or pulverulent fuels
- F23D2201/20—Fuel flow guiding devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2209/00—Safety arrangements
- F23D2209/20—Flame lift-off / stability
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
- F23D2900/01001—Pulverised solid fuel burner with means for swirling the fuel-air mixture
Definitions
- Coal dust burners for lignite are usually designed as jet burners with a rectangular cross-section, in whose center plane air nozzles are used. Below and above these burners and between them, further air nozzles are provided for the supply of under air, upper air and middle air.
- the coal dust can escape from this burner under unfavorable conditions with an uneven dust distribution, whereby, due to the lack of ignition aids, the fuel is ignited late in the combustion chamber and under conditions that occur during the pyrolysis by admixing the top and bottom - and medium air partially lead to an increased excess of air and thus favor NO x formation.
- Lignite naturally contains a high proportion of water, during grinding in the mill with the help of sucked hot flue gases evaporated to a large extent becomes.
- the coal dust carrier gas flow introduces one high proportion of water vapor with it, the ignition properties of the fuel at the burner outlet is negatively affected.
- a swirl body in the Provide dust line that connects the grinder to the burner connects. The swirl thus forced divides the coal dust carrier gas stream into a fuel-rich partial flow and into a low fuel vapor flow.
- the vapor stream is either discharged outside after flowing through a filter or it is fed to separate vapor burners.
- This Vapor burners are outside or as separate guide tubes arranged within the main burner (DE-OS 29 33 528; Brennst.-Wärme-Kraft 24 (1972) No. 3, pages 90 - 93).
- the invention has for its object one for Combustion of dusty lignite suitable burner the Generic type to improve such that clear Ignition conditions are created.
- the necessary to burn the remaining coal Burner air is assigned to each burner tube as secondary air fed. So that the ignition process at the burner outlet does not go through Air fluctuations, high exit speeds or Vortex formation can be disturbed, the secondary air is through an air repellent throat kept away and sufficiently delayed the Fuel products supplied.
- a stabilizing ring is in connection with a swirl body in the case of burners for the combustion of dusty hard coal known.
- coal is less Has water content as lignite during milling drying dried in the mill with preheated air so that, otherwise than when milling brown coal with hot flue gases, the water vapor content in the coal dust carrier gas stream is lower and the proportion of inert gases is missing.
- the Coping with these material flows prepared during the combustion of dusty lignite difficulties and has only so far by separating the vapor in front of the burner.
- FIG. 1 is a side view of a brown coal burner
- 2 shows the section II - II of FIG. 1st
- a Burner 3 for the combustion of dusty lignite arranged in an opening 1 of a side wall 2 of a combustion chamber.
- the burner 3 consists of several, in the present Case of three individual burners 3.1, 3.2 arranged one above the other 3.3.
- the individual burners 3.1, 3.2, 3.3 are in a refractory Brick lining 4.
- Each individual burner 3.1, 3.2, 3.3 has a circular one Cross section on and consists of a burner tube 5.
- Das Burner tube 5 is connected via a manifold 6 with a dust line 7 connected, which is led to a mill, not shown. In the mill grinds raw lignite and during grinding with the help of hot flue gas drawn in from the combustion chamber is dried. The flue gas also serves as Drying and carrier gas.
- Burner tube 5 In the intake end of the manifold 6 facing Burner tube 5 is a swirl generator 8 with a center arranged displacement body 9 installed.
- the swirl generator 8 is provided on its circumference with several blades that the displacement body 9 are attached.
- the blades of the Swirl generator 8 are against the longitudinal axis of burner tube 5 arranged at an angle of 15 to 45 ° overlapping.
- a stabilizing ring 10 In the mouth of the burner tube 5 is a stabilizing ring 10 arranged, which protrudes into the burner tube 5.
- the Stabilizing ring 10 contains two groups of segments 11, which are spaced apart and evenly over the circumference are distributed.
- the segments 11.1 of the first group are web-like with a small wall thickness and in Longitudinal direction of the burner tube 5 aligned.
- Axial and radial are between the segments 11.1 of the first group Segments 11.2 of the second group. These segments are 11.2 seen shorter and in the circumferential direction of the burner tube 5 wider than the segments 11.1.
- six segments 11.1, 11.2 each are provided.
- the radial, in the burner tube 5 protruding length of the segments 11.1, 11.2 is about 10 to 20% of the inner diameter of the Burner tube 5. Its length in the circumferential direction can be 1 to 20% of the inner diameter of the burner tube 5.
- the burner tube 6 is from an annular to the combustion chamber surrounded open air duct 13.
- the air duct 13 is with a preferably spiral-shaped inlet housing 14 connected.
- the combustion air is secondary air via the air duct 13 given up.
- In the mouth cross section of the air duct 13 is on the burner tube 5 an air repellent groove 15 is arranged.
- the end the air deflection throat 15 projects into the opening 1 of the side wall 2 of the firebox and is on this part as an after cone pointing towards the outside.
- the pulverized and dried brown coal dust passes through the dust line 7 together with the carrier gas the manifold 6 in the burner tube 5.
- the manifold 6 is as Impact manifold designed and with on the upstream side Provide baffle plates. A first takes place in the manifold 6 Separation of the coal particles from the Kolenstaub-carrier gas stream instead, by the downstream sinker 9 and the swirl generator 8 is amplified. This will be a Sheath current generated, preferably with carbon particles is enriched.
- the fuel-rich jacket stream encloses a low-fuel vapor stream, the larger amounts of Contains water vapor and inert gases.
- the in the sheath current protruding segments 11.1, 11.2 of the stabilizing ring 10 cause a turbulence of the sheath flow, whereby a safe ignition in the plane of the mouth of the burner tube 5 and a stable flame zone is created in the combustion chamber.
- the pipe section 12 in the burner mouth prevents one Mass transfer between the partially swirled fuel-rich sheath flow and the oxygen and low-fuel, central vapor flow.
- the pipe section 12 thus contributes to the further stabilization of the ignition.
- the cone of the air deflection throat 15 holds the air duct 13 out escaping secondary air away from the burner mouth and thus prevents the ignition process from fluctuations in air and high exit speeds or vortex formation is affected.
Description
Claims (3)
- Brenner zum Verbrennen von staubförmiger Braunkohle, dessen Mündung in der Wand eines Feuerraumes angeordnet ist, wobei der Brenner (3) mit einer Mühle über eine Staubleitung (7) verbunden ist, einen kreisförmigen Querschnitt aufweist und von einem ringförmigen Luftkanal (13) umgeben und mit einem Verdrängungskörper (9) und einem Drallerzeuger (8) versehen ist, dadurch gekennzeichnet, daß der Drallerzeuger (8) mit dem Verdrängungskörper (9) in dem eintrittsseitigem Ende des Brenners (3) angeordnet ist und einen brennstoffreichen Mantelstrom und einen brennstoffarmen Brüdenstrom erzeugt, daß in der Mündung des Brenners (3) ein Stabilisierungsring (10) angeordnet ist, der nach innen gerichtete, mit seitlichem Abstand voneinander angeordnete Segmente (11.1, 11.2) aufweist, die in den Mantelstrom hineinragen und daß in der Mündung des Brenners (3) in einem radialen Abstand von der Innenkante des Stabilisierungsringes (10) ein Rohrabschnitt (12) angeordnet ist, der über die Segmente (11.1) des Stabilisierungsringes (10) an der Innenwand des Brennerrohres (5) abgestützt ist.
- Brenner nach Anspruch 1, dadurch gekennzeichnet, daß die Segmente (11.1, 11.2) bezogen auf die Längs- und die Umfangsrichtung des Stabilisierungsringes (10) eine unterschiedliche Länge aufweisen und daß die unterschiedlich langen Segmente (11.1, 11.2) jeweils abwechselnd über den Umfang verteilt sind.
- Brenner nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß in der Mündung des Luftkanales (13) eine Luftabweiskehle (15) angeordnet ist, die auf dem Brennerrohr (5) abgestützt und an ihrem Ende mit einem nach außen weisenden Kegel versehen ist.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SI9430232T SI0670454T1 (en) | 1994-03-04 | 1994-12-20 | Burner for brown coal |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4407198A DE4407198A1 (de) | 1994-03-04 | 1994-03-04 | Braunkohlenbrenner |
DE4407198 | 1994-03-04 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0670454A1 EP0670454A1 (de) | 1995-09-06 |
EP0670454B1 true EP0670454B1 (de) | 1999-03-10 |
Family
ID=6511845
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94120182A Expired - Lifetime EP0670454B1 (de) | 1994-03-04 | 1994-12-20 | Braunkohlenbrenner |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0670454B1 (de) |
CZ (1) | CZ284925B6 (de) |
DE (2) | DE4407198A1 (de) |
GR (1) | GR3029937T3 (de) |
SI (1) | SI0670454T1 (de) |
SK (1) | SK281846B6 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005032109B4 (de) * | 2005-07-07 | 2009-08-06 | Hitachi Power Europe Gmbh | Kohlenstaubbrenner für niedrige NOx-Emissionen |
EP3228935A1 (de) | 2016-04-08 | 2017-10-11 | Steinmüller Engineering GmbH | Verfahren zur stickoxid-armen verbrennung von festen, flüssigen oder gasförmigen brennstoffen, insbesondere kohlenstaub, ein brenner und eine feuerungsanlage zur durchführung des verfahrens |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8991323B2 (en) * | 2008-11-14 | 2015-03-31 | Babcock & Wilcox Power Generation Group, Inc. | Bladed coal diffuser and coal line balancing device |
GB2551166A (en) * | 2016-06-08 | 2017-12-13 | Doosan Babcock Ltd | Burner |
DE102017101670A1 (de) | 2017-01-27 | 2018-08-02 | Babcock Borsig Steinmüller Gmbh | Brenner, insbesondere Braunkohle-Strahlbrenner |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60226609A (ja) * | 1984-04-23 | 1985-11-11 | Babcock Hitachi Kk | 燃焼装置 |
DD267548A1 (de) * | 1987-11-30 | 1989-05-03 | Thierbach Kraftwerk | Kohlenstaubbrenner |
DE68912401T2 (de) * | 1988-03-04 | 1994-06-23 | Northern Eng Ind | Brenner für staubförmigen Brennstoff. |
DD289321A5 (de) * | 1989-11-23 | 1991-04-25 | Technische Hochschule Zittau,De | Vorrichtung zur verbrennung von brennstaeuben in ventilatormuehlenfeuerungen |
EP0445938B1 (de) * | 1990-03-07 | 1996-06-26 | Hitachi, Ltd. | Kohlenstaubbrenner, Kohlenstaubkessel und Verfahren zum Verbrennen von Kohlenstaub |
DE4103850A1 (de) * | 1991-02-08 | 1992-08-13 | Wahl Verschleiss Tech | Duesenring fuer die brennduese eines kohlenkraftwerkes |
-
1994
- 1994-03-04 DE DE4407198A patent/DE4407198A1/de not_active Withdrawn
- 1994-12-02 CZ CZ943027A patent/CZ284925B6/cs not_active IP Right Cessation
- 1994-12-06 SK SK1507-94A patent/SK281846B6/sk not_active IP Right Cessation
- 1994-12-20 EP EP94120182A patent/EP0670454B1/de not_active Expired - Lifetime
- 1994-12-20 DE DE59407926T patent/DE59407926D1/de not_active Expired - Lifetime
- 1994-12-20 SI SI9430232T patent/SI0670454T1/xx unknown
-
1999
- 1999-04-13 GR GR990401026T patent/GR3029937T3/el unknown
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005032109B4 (de) * | 2005-07-07 | 2009-08-06 | Hitachi Power Europe Gmbh | Kohlenstaubbrenner für niedrige NOx-Emissionen |
EP3228935A1 (de) | 2016-04-08 | 2017-10-11 | Steinmüller Engineering GmbH | Verfahren zur stickoxid-armen verbrennung von festen, flüssigen oder gasförmigen brennstoffen, insbesondere kohlenstaub, ein brenner und eine feuerungsanlage zur durchführung des verfahrens |
Also Published As
Publication number | Publication date |
---|---|
EP0670454A1 (de) | 1995-09-06 |
CZ302794A3 (en) | 1995-11-15 |
SK150794A3 (en) | 1995-10-11 |
GR3029937T3 (en) | 1999-07-30 |
DE59407926D1 (de) | 1999-04-15 |
SK281846B6 (sk) | 2001-08-06 |
DE4407198A1 (de) | 1995-09-07 |
CZ284925B6 (cs) | 1999-04-14 |
SI0670454T1 (en) | 1999-06-30 |
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