EP0433789A1 - Verfahren für eine Vormischverbrennung eines flüssigen Brennstoffes - Google Patents

Verfahren für eine Vormischverbrennung eines flüssigen Brennstoffes Download PDF

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Publication number
EP0433789A1
EP0433789A1 EP90123494A EP90123494A EP0433789A1 EP 0433789 A1 EP0433789 A1 EP 0433789A1 EP 90123494 A EP90123494 A EP 90123494A EP 90123494 A EP90123494 A EP 90123494A EP 0433789 A1 EP0433789 A1 EP 0433789A1
Authority
EP
European Patent Office
Prior art keywords
burner
fuel
flame
interior
mixture
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.)
Withdrawn
Application number
EP90123494A
Other languages
German (de)
English (en)
French (fr)
Inventor
Jürgen Dr. Haumann
Jakob Dr. Keller
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.)
ABB Asea Brown Boveri Ltd
ABB AB
Original Assignee
ABB Asea Brown Boveri Ltd
Asea Brown Boveri AB
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 ABB Asea Brown Boveri Ltd, Asea Brown Boveri AB filed Critical ABB Asea Brown Boveri Ltd
Publication of EP0433789A1 publication Critical patent/EP0433789A1/de
Withdrawn legal-status Critical Current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
    • F23C7/002—Combustion apparatus characterised by arrangements for air supply the air being submitted to a rotary or spinning motion
    • 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
    • F23D11/40—Mixing tubes; Burner heads
    • F23D11/402—Mixing chambers downstream of the nozzle
    • 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 
    • F23C2900/00—Special features of, or arrangements for combustion apparatus using fluid fuels or solid fuels suspended in air; Combustion processes therefor
    • F23C2900/07002—Premix burners with air inlet slots obtained between offset curved wall surfaces, e.g. double cone burners

Definitions

  • the present invention relates to a method for premix combustion according to claim 1. It also relates to a burner for carrying out the method according to claim 1.
  • a burner has become known, in the interior of which a fuel nozzle is placed, from which a conical fuel column that extends in the direction of flow is formed and which extends tangentially into the hollow partial cone body, which is positioned one on top of the other, with a cone opening increasing in the direction of flow and with Rotating combustion air flow flowing into the existing burner, which is offset from one another, is mixed.
  • the ignition of the air / fuel mixture takes place at the outlet of the burner, a "backflow zone" forming in the area of the burner mouth, which prevents the flame from flashing back into the burner from the combustion chamber.
  • Ignition delay time is related to the flame radiation: At high pressure the flame radiation (H2O, CO) will be very strong; a significant part of the radiation is absorbed by the fuel droplets (opaque mist). This mechanism of energy transfer to the liquid fuel leads to a drastic reduction in the ignition delay time.
  • the invention seeks to remedy this.
  • the invention as characterized in the claims, is based on the object of preventing the interaction between flame radiation and fuel droplets, which leads to early ignition of the mixture, in a method of the type mentioned.
  • the main advantage of the invention can be seen in the fact that the injection and vaporization of the fuel is shielded from the flame radiation in such a way that the fuel only enters the radiation area of the flame after it has evaporated. Since a vaporized fuel hardly absorbs flame radiation, the danger of the mixture igniting prematurely is averted.
  • FIGS. 1 and 2 are interpreted simultaneously when studying the description. Furthermore, in order not to confuse the individual figures, partial aspects of the burner have been distributed to the individual figures, reference being made to this fact in the description of these figures.
  • the core body of the burner shown in Fig. 1 consists of two half hollow partial cone bodies 1, 2, which are offset from one another.
  • the offset of the respective central axes creates a tangential entry slot 1c, 2c (FIG. 2) on both sides in an axially symmetrical arrangement, through which an air / fuel mixture 6 flows into the interior 3 of the burner, ie into the cone cavity.
  • a tangential entry slot 1c, 2c FIG. 2
  • the conical shape of the partial conical bodies 1, 2 shown in the flow direction has a certain fixed angle.
  • the partial cone bodies 1, 2 can describe an increasing cone inclination (convex shape) or a decreasing cone inclination (concave shape) in the direction of flow.
  • the last two forms are not included in the drawing, since they can easily be traced.
  • the form shown in the drawing is preferably used.
  • the tangential entry slot width is a measure that results from the displacement of the two central axes (1b, 2b from FIG. 2) with respect to one another.
  • the two partial cone bodies 1, 2 each have a cylindrical initial part 1a, 2a, which, similarly to the partial cone bodies 1, 2 mentioned, also run offset from one another, so that the tangential air inlets 1c, 2c (FIG. 2) over the entire length of the BV Brenners are present.
  • the BV burner can be designed to be purely conical, that is to say without a cylindrical initial part.
  • the BV burner has a wall 9 which, for example, forms the inlet front of an annular combustion chamber or a furnace. The air / fuel mixture 6 flowing through the tangential air inlets 1c, 2c (FIG.
  • Fig. 2 is a section through the BV burner along the plane II-II, where there are also two fuel nozzles 4a, 4b.
  • the number and size of the fuel nozzles provided in the flow direction of the BV burner depend on the power to be provided by this BV burner. Accordingly, the fuel 4c, 4d is introduced via an arrangement of fuel nozzles 4a, 4b, which are preferably designed as injector nozzles when using a liquid fuel, in inlet channels 7a, 7b before the actual entry into the interior 3 of the double-cone burner and pre-evaporated there .
  • the speed of the combustion air 5 and the distance of the fuel nozzles from the inlet slots 1d, 2d into the interior 3 of the burner must thus depend on the temperature of the combustion air 5, on the properties of the fuel 4c, 4d and, in the case of liquid fuel, the maximum size of the fuel droplets be matched that the fuel is pre-evaporated in the mixture 6 before reaching the entry slots 1d, 2d, because from this passage point the mixture 6 is in "visual contact" with the flame, ie with the flame front 12.
  • combustion air 5 is an air / exhaust gas mixture: this recirculation of a quantity of a partially cooled exhaust gas, which originally has a temperature of approx. 950 ° C., is also necessary for optimal operation of the double-cone burner when it is used in atmospheric combustion plants is used for near-stoichiometric driving.
  • the optimal mass flow ratio i.e. the ratio between recirculated exhaust gas and fresh air supplied is about 0.7.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Spray-Type Burners (AREA)
EP90123494A 1989-12-19 1990-12-07 Verfahren für eine Vormischverbrennung eines flüssigen Brennstoffes Withdrawn EP0433789A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH4543/89A CH680946A5 (enrdf_load_stackoverflow) 1989-12-19 1989-12-19
CH4543/89 1989-12-19

Publications (1)

Publication Number Publication Date
EP0433789A1 true EP0433789A1 (de) 1991-06-26

Family

ID=4278049

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90123494A Withdrawn EP0433789A1 (de) 1989-12-19 1990-12-07 Verfahren für eine Vormischverbrennung eines flüssigen Brennstoffes

Country Status (6)

Country Link
US (1) US5085575A (enrdf_load_stackoverflow)
EP (1) EP0433789A1 (enrdf_load_stackoverflow)
JP (1) JPH03294707A (enrdf_load_stackoverflow)
CA (1) CA2032202A1 (enrdf_load_stackoverflow)
CH (1) CH680946A5 (enrdf_load_stackoverflow)
PL (1) PL288224A1 (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0503319A3 (en) * 1991-03-12 1993-02-24 Asea Brown Boveri Ag Burner for a premixing combustion of a liquid and/or a gaseous fuel
DE19502796A1 (de) * 1995-01-30 1996-08-01 Abb Management Ag Brenner
EP0777081A3 (de) * 1995-12-02 1998-10-21 Abb Research Ltd. Vormischbrenner
EP0981019A1 (de) * 1998-08-20 2000-02-23 Asea Brown Boveri AG Verfahren sowie Brenner zur Verbrennung von flüssigen Brennstoffen
EP0981016A1 (de) * 1998-08-19 2000-02-23 Asea Brown Boveri AG Brenner sowie Verfahren zum Betrieb einer Brennkraftmaschine

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5165241A (en) * 1991-02-22 1992-11-24 General Electric Company Air fuel mixer for gas turbine combustor
AU2923792A (en) * 1991-10-28 1993-06-07 Irvin Glassman Asymmetric whirl combustion
DE59209209D1 (de) * 1992-10-16 1998-04-02 Asea Brown Boveri Gasbetriebener Vormischbrenner
US5450724A (en) * 1993-08-27 1995-09-19 Northern Research & Engineering Corporation Gas turbine apparatus including fuel and air mixer
DE4330083A1 (de) * 1993-09-06 1995-03-09 Abb Research Ltd Verfahren zum Betrieb eines Vormischbrenners
US5408825A (en) * 1993-12-03 1995-04-25 Westinghouse Electric Corporation Dual fuel gas turbine combustor
DE10049205A1 (de) * 2000-10-05 2002-05-23 Alstom Switzerland Ltd Verfahren und Vorrichtung zur Brennstoffversorgung eines Vormischbrenners
DE10051221A1 (de) * 2000-10-16 2002-07-11 Alstom Switzerland Ltd Brenner mit gestufter Brennstoff-Eindüsung
US20050032012A1 (en) * 2003-05-16 2005-02-10 Eil Louis Van Method and apparatus for detecting a burner flame of a gas appliance
EP1856447B1 (de) * 2005-03-09 2014-09-24 Alstom Technology Ltd Vormischbrenner zum betreiben einer brennkammer
US8622053B2 (en) 2009-03-16 2014-01-07 Planika Sp. Z O.O. Burner and method of its operation
US8418469B2 (en) 2010-09-27 2013-04-16 General Electric Company Fuel nozzle assembly for gas turbine system
US9010119B2 (en) 2010-11-03 2015-04-21 General Electric Company Premixing nozzle
CN103032873A (zh) * 2013-01-22 2013-04-10 江苏索尔自动化设备有限公司 旋风式供氧分配器
US9964043B2 (en) 2014-11-11 2018-05-08 General Electric Company Premixing nozzle with integral liquid evaporator
CN107923620B (zh) 2015-08-26 2021-06-01 通用电气公司 具有整体式液体喷射器/蒸发器的多燃料预混合喷嘴的系统和方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2018485A1 (de) * 1969-04-17 1971-01-14 General Electric Company, Schenectady, NY (V St A ) Brennstoffversorgungssystem
US3890088A (en) * 1970-09-17 1975-06-17 Advanced Tech Lab Apparatus for reducing formation of oxides of nitrogen in combustion processes
US3980422A (en) * 1975-08-11 1976-09-14 Hed Industries, Inc. Oil injection means for liquid fuel burner
US4003691A (en) * 1975-08-22 1977-01-18 Consolidated Natural Gas Service Co., Inc. Recirculating burner
EP0095788A1 (de) * 1982-05-28 1983-12-07 BBC Aktiengesellschaft Brown, Boveri & Cie. Brennkammer einer Gasturbine und Verfahren zu deren Betrieb
EP0321809B1 (de) * 1987-12-21 1991-05-15 BBC Brown Boveri AG Verfahren für die Verbrennung von flüssigem Brennstoff in einem Brenner

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60117008A (ja) * 1983-11-30 1985-06-24 Nissan Motor Co Ltd 燃焼器

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2018485A1 (de) * 1969-04-17 1971-01-14 General Electric Company, Schenectady, NY (V St A ) Brennstoffversorgungssystem
US3890088A (en) * 1970-09-17 1975-06-17 Advanced Tech Lab Apparatus for reducing formation of oxides of nitrogen in combustion processes
US3980422A (en) * 1975-08-11 1976-09-14 Hed Industries, Inc. Oil injection means for liquid fuel burner
US4003691A (en) * 1975-08-22 1977-01-18 Consolidated Natural Gas Service Co., Inc. Recirculating burner
EP0095788A1 (de) * 1982-05-28 1983-12-07 BBC Aktiengesellschaft Brown, Boveri & Cie. Brennkammer einer Gasturbine und Verfahren zu deren Betrieb
EP0321809B1 (de) * 1987-12-21 1991-05-15 BBC Brown Boveri AG Verfahren für die Verbrennung von flüssigem Brennstoff in einem Brenner

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Band 9, Nr. 272 (M-425)[1995], 30. Oktober 1985; & JP-A-60 117 008 (NISSAN) 24-06-1985 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0503319A3 (en) * 1991-03-12 1993-02-24 Asea Brown Boveri Ag Burner for a premixing combustion of a liquid and/or a gaseous fuel
DE19502796A1 (de) * 1995-01-30 1996-08-01 Abb Management Ag Brenner
US5674066A (en) * 1995-01-30 1997-10-07 Asea Brown Boveri Ag Burner
DE19502796B4 (de) * 1995-01-30 2004-10-28 Alstom Brenner
EP0777081A3 (de) * 1995-12-02 1998-10-21 Abb Research Ltd. Vormischbrenner
EP0981016A1 (de) * 1998-08-19 2000-02-23 Asea Brown Boveri AG Brenner sowie Verfahren zum Betrieb einer Brennkraftmaschine
EP0981019A1 (de) * 1998-08-20 2000-02-23 Asea Brown Boveri AG Verfahren sowie Brenner zur Verbrennung von flüssigen Brennstoffen

Also Published As

Publication number Publication date
CH680946A5 (enrdf_load_stackoverflow) 1992-12-15
CA2032202A1 (en) 1991-06-20
JPH03294707A (ja) 1991-12-25
PL288224A1 (en) 1991-12-02
US5085575A (en) 1992-02-04

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