WO1999005451A1 - Eckenbrenner für eine tangentialfeuerung und verfahrens zu dessen betrieb - Google Patents
Eckenbrenner für eine tangentialfeuerung und verfahrens zu dessen betrieb Download PDFInfo
- Publication number
- WO1999005451A1 WO1999005451A1 PCT/EP1998/003655 EP9803655W WO9905451A1 WO 1999005451 A1 WO1999005451 A1 WO 1999005451A1 EP 9803655 W EP9803655 W EP 9803655W WO 9905451 A1 WO9905451 A1 WO 9905451A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- air
- flow
- nozzle
- wall
- combustion chamber
- Prior art date
Links
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
- F23C7/02—Disposition of air supply not passing through burner
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15D—FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
- F15D1/00—Influencing flow of fluids
- F15D1/08—Influencing flow of fluids of jets leaving an orifice
-
- 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
- F23C5/00—Disposition of burners with respect to the combustion chamber or to one another; Mounting of burners in combustion apparatus
- F23C5/08—Disposition of burners
- F23C5/32—Disposition of burners to obtain rotating flames, i.e. flames moving helically or spirally
Definitions
- the invention relates to a method for operating a corner burner for tangential firing, in which at least one stream of coal dust and primary air and optionally another stream of combustion air and / or recirculated flue gas are oriented tangentially to an imaginary, essentially horizontal circle in the firing chamber of the tangential firing via the corner burner be introduced into the combustion chamber and at least one further air flow (wall air flow) adjustable through a nozzle of the corner burner is introduced into the combustion chamber at an offset angle to the flow of coal dust and primary air in the direction of a wall of the combustion chamber.
- Such a method is known from EP 22 454 B1, in which an air flow referred to as secondary air is introduced into the furnace in such a way that the secondary air flow is directed tangentially to a second imaginary circle which is at a distance from the first imaginary circle to the outside.
- the second air flow is intended to maintain an oxidizing atmosphere along the firing walls in order to reduce the formation of slag and corrosion on an associated firing wall.
- the nozzle for the flow of coal dust and primary air and the nozzle for the secondary air are preferably arranged one above the other in the vertical installation position of the corner burner, as shown in FIG. 5 of EP 22 454 B1.
- the nozzle has swiveling devices for the further air flow (secondary air flow or wall air flow). Such mechanical swivel devices are complex to manufacture and are exposed to the high furnace temperatures.
- the offset angle is adjusted by a proportionate mixture of at least two partial air jets of different flow speeds, one of which flows in a straight line onto the outlet opening of the nozzle and the other partial flow flows into the one partial flow at an angle in front of the outlet opening and whose flow velocities can be changed.
- the exit angle of the mixed flow from the outlet opening of the wall air nozzle can be adjusted continuously.
- Mechanical adjustment elements in the outlet opening of the nozzle are not required.
- the invention is also directed to a corner burner with at least one nozzle for the exit of a flow of coal dust and primary air and at least one nozzle for the exit of a further air flow (wall air flow) at an adjustable offset angle relative to the coal dust primary air flow.
- a mixing space is provided in front of the outlet opening of the nozzle, which has a wall extending parallel to the axis and wall inclined against the axis, and that the widening mixing space is on its end facing away from the outlet opening of the nozzle is connected to at least two air channels in such a way that the air stream emerging from one channel is aligned directly with the outlet opening and the air stream emerging from the other air channel hits the inclined wall, is deflected and can be mixed into the first partial stream, and that the flow velocities of the two partial flows are adjustable.
- the two air ducts are preferably formed by a single air supply duct with an internal duct partition which ends approximately at the connection point between the mixing space and the air supply duct.
- a particularly simple embodiment is achieved if the air channels have essentially the same cross section.
- the coal dust primary air nozzle and the further nozzle are arranged one above the other.
- Fig. 1 shows a horizontal section through the firebox of a tangential
- FIGS. 2-4 show a schematic horizontal section through the firing chamber and a wall air nozzle of a corner burner to explain different exposure conditions of the wall air nozzle.
- FIG. 1 shows a horizontal cross-section, not to scale, through the combustion chamber 1 of a tangential furnace.
- Corner burners 2 are assigned to the four corners of the firebox. Each corner burner has at least one nozzle for the discharge of a stream 3 of coal dust and primary air.
- the coal dust primary air flows 3 are aligned with an imaginary circle 4 arranged concentrically to the vertical axis of the combustion chamber. As a result of this alignment, the combustion chamber swirl 5 is formed in the combustion chamber during operation of the furnace.
- a wall air stream 6 is fed via a wall air nozzle 9 of the corner burner in such a way that it enters between the main stream 3 and an adjacent combustion chamber wall 7 in order to build up an oxidizing atmosphere in the endangered area 8 of the combustion chamber wall 7 and to avoid slagging and corrosion of the wall 7. It is advisable that the offset angle ⁇ is adjustable.
- a horizontal section through the wall air nozzle 9 of the corner burner 2 is shown, which is arranged above or below the coal dust primary air nozzle.
- a mixing chamber 11 is connected upstream of the outlet opening 10 with the central axis 10a.
- the mixing space 11 is delimited by a wall 12 which extends from the outlet opening 10 and extends vertically parallel to the axis 10a and a wall 13 which likewise extends from the outlet opening and is inclined at an angle to the axis 10a in such a way that the mixing space extends from the outlet opening 10 starting expanded.
- An air supply duct 14 is connected to the free end of the mixing chamber 11 and is divided into a sub-duct 16 and a sub-duct 17 by a duct partition 15, the sub-duct 16 essentially directly onto the outlet opening 10 and the sub-duct 17 onto the inside of the inclined wall 13 are aligned.
- the two channels 16 and 17 preferably have the same flow cross sections.
- the partition 15 is preferably aligned with the upper edge of the outlet opening in FIGS. 2-4 and preferably ends in the connection area between the mixing space 11 and the air supply duct 14.
- the wall 12 can of course be an extension of the corresponding wall of the duct 14.
- the offset angle ⁇ is achieved by supplying ducts 16 and 17 with partial air flows of different speeds.
- the length of the arrow symbols used in the figures is a measure of the speed.
- the direction of exit is further determined by the angle of inclination ⁇ of the wall 13.
- the wall air flow 6 occurs at the maximum possible angle, which is somewhat smaller than the angle of inclination ⁇ of the side wall 13, because it also occurs in the subchannel (17 in FIGS. 2 and 16 in FIG. 3) that is less loaded some rest of the air has to flow to cool the channel.
- the boundary surfaces of the mixing chamber parallel to the plane of the drawings 2-4 can be formed by parallel and horizontally spaced sheets.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98932161A EP0927320A1 (de) | 1997-07-22 | 1998-06-17 | Eckenbrenner für eine tangentialfeuerung und verfahren zu dessen betrieb |
PL98332429A PL332429A1 (en) | 1997-07-22 | 1998-06-17 | Corner burner operation method for a chamber-type burner furnace with tangent arrangement of burners and corner burner therefor |
US09/210,516 US6082273A (en) | 1997-07-22 | 1998-12-11 | Method for operating a corner burner for a tangential burner system and corner burner for performing the method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19731474A DE19731474C1 (de) | 1997-07-22 | 1997-07-22 | Verfahren zum Betrieb eines Eckenbrenners für eine Tangentialfeuerung und Eckenbrenner zur Durchführung des Verfahrens |
DE19731474.0 | 1997-07-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999005451A1 true WO1999005451A1 (de) | 1999-02-04 |
Family
ID=7836532
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1998/003655 WO1999005451A1 (de) | 1997-07-22 | 1998-06-17 | Eckenbrenner für eine tangentialfeuerung und verfahrens zu dessen betrieb |
Country Status (6)
Country | Link |
---|---|
US (1) | US6082273A (de) |
EP (1) | EP0927320A1 (de) |
DE (1) | DE19731474C1 (de) |
PL (1) | PL332429A1 (de) |
WO (1) | WO1999005451A1 (de) |
ZA (1) | ZA986202B (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016002899A1 (de) | 2016-03-09 | 2017-09-14 | Johannes Kraus | (Naturzug)Feuerraum mit verbessertem Ausbrand |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001077583A1 (de) * | 2000-04-12 | 2001-10-18 | Saar Energie Gmbh | Verfahren zum verbrennen von staubförmigem brennstoff in einem kraftwerkskessel |
DE10301316B3 (de) * | 2003-01-15 | 2004-08-05 | Alstom Power Boiler Gmbh | Verfahren und Vorrichtung zum NOx-armen Verbrennen von Brennstoffstaub |
DE102004022514A1 (de) * | 2004-05-05 | 2005-12-01 | Babcock-Hitachi Europe Gmbh | Dampferzeuger und Verfahren zum Betreiben eines Dampferzeugers |
PL385432A1 (pl) * | 2008-06-13 | 2009-12-21 | Politechnika Lubelska | Sposób utylizacji odpadów ściekowych zintegrowany z odzyskiem energii |
CN101718431B (zh) * | 2009-12-28 | 2011-03-23 | 上海交通大学 | 电站燃煤锅炉直流燃烧器喷口结构 |
CN102506419A (zh) * | 2011-09-30 | 2012-06-20 | 哈尔滨工业大学 | 一种墙式布置的两级燃尽风装置 |
CN111594828A (zh) * | 2020-04-10 | 2020-08-28 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | 基于锅炉设计角度的防结渣方法 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0022454A2 (de) | 1979-07-12 | 1981-01-21 | Combustion Engineering, Inc. | Öfen mit Düsensätzen für die tangentiale Zufuhr pulverisierter Kohle, Luft und rückgeführter Abgase |
US4425855A (en) * | 1983-03-04 | 1984-01-17 | Combustion Engineering, Inc. | Secondary air control damper arrangement |
US4569311A (en) * | 1981-09-24 | 1986-02-11 | Combustion Engineering, Inc. | Method of firing a pulverized coal-fired furnace |
JPS6370005A (ja) * | 1986-09-10 | 1988-03-30 | Mitsubishi Heavy Ind Ltd | ボイラ |
US5315939A (en) * | 1993-05-13 | 1994-05-31 | Combustion Engineering, Inc. | Integrated low NOx tangential firing system |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE972968C (de) * | 1941-11-25 | 1959-11-05 | Comb Engineering | Mit fluessigem Schlackenabfluss arbeitender Strahlungsdampferzeuger |
SU1753186A1 (ru) * | 1990-03-27 | 1992-08-07 | Московский энергетический институт | Способ сжигани пылеугольного топлива |
-
1997
- 1997-07-22 DE DE19731474A patent/DE19731474C1/de not_active Expired - Fee Related
-
1998
- 1998-06-17 PL PL98332429A patent/PL332429A1/xx unknown
- 1998-06-17 WO PCT/EP1998/003655 patent/WO1999005451A1/de not_active Application Discontinuation
- 1998-06-17 EP EP98932161A patent/EP0927320A1/de not_active Withdrawn
- 1998-07-13 ZA ZA986202A patent/ZA986202B/xx unknown
- 1998-12-11 US US09/210,516 patent/US6082273A/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0022454A2 (de) | 1979-07-12 | 1981-01-21 | Combustion Engineering, Inc. | Öfen mit Düsensätzen für die tangentiale Zufuhr pulverisierter Kohle, Luft und rückgeführter Abgase |
US4569311A (en) * | 1981-09-24 | 1986-02-11 | Combustion Engineering, Inc. | Method of firing a pulverized coal-fired furnace |
US4425855A (en) * | 1983-03-04 | 1984-01-17 | Combustion Engineering, Inc. | Secondary air control damper arrangement |
JPS6370005A (ja) * | 1986-09-10 | 1988-03-30 | Mitsubishi Heavy Ind Ltd | ボイラ |
US5315939A (en) * | 1993-05-13 | 1994-05-31 | Combustion Engineering, Inc. | Integrated low NOx tangential firing system |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 012, no. 292 (M - 729) 10 August 1988 (1988-08-10) * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016002899A1 (de) | 2016-03-09 | 2017-09-14 | Johannes Kraus | (Naturzug)Feuerraum mit verbessertem Ausbrand |
Also Published As
Publication number | Publication date |
---|---|
DE19731474C1 (de) | 1998-12-24 |
US6082273A (en) | 2000-07-04 |
EP0927320A1 (de) | 1999-07-07 |
PL332429A1 (en) | 1999-09-13 |
ZA986202B (en) | 1999-02-02 |
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