EP0172303A1 - Brûleur pour combustibles liquides, particulièrement pour combustibles avec des corps solides - Google Patents

Brûleur pour combustibles liquides, particulièrement pour combustibles avec des corps solides Download PDF

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Publication number
EP0172303A1
EP0172303A1 EP85101685A EP85101685A EP0172303A1 EP 0172303 A1 EP0172303 A1 EP 0172303A1 EP 85101685 A EP85101685 A EP 85101685A EP 85101685 A EP85101685 A EP 85101685A EP 0172303 A1 EP0172303 A1 EP 0172303A1
Authority
EP
European Patent Office
Prior art keywords
section
fuel
mixing
channel
burner
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.)
Granted
Application number
EP85101685A
Other languages
German (de)
English (en)
Other versions
EP0172303B1 (fr
Inventor
Kurt Lohoff
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.)
Deutsche Babcock Werke AG
Original Assignee
Deutsche Babcock Werke 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 Deutsche Babcock Werke AG filed Critical Deutsche Babcock Werke AG
Priority to AT85101685T priority Critical patent/ATE34446T1/de
Publication of EP0172303A1 publication Critical patent/EP0172303A1/fr
Application granted granted Critical
Publication of EP0172303B1 publication Critical patent/EP0172303B1/fr
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D1/00—Burners for combustion of pulverulent fuel
    • F23D1/005—Burners for combustion of pulverulent fuel burning a mixture of pulverulent fuel delivered as a slurry, i.e. comprising a carrying liquid
    • 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
    • F23D11/10—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour
    • F23D11/101—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour medium and fuel meeting before the burner outlet
    • F23D11/102—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour medium and fuel meeting before the burner outlet in an internal mixing chamber

Definitions

  • the invention relates to a burner for liquid fuels, in particular containing solid components, with the features of the preamble of claim 1.
  • the fuel is brought together with the atomizing medium in the mixing space inside the nozzle and mixed with one another.
  • the resulting emulsion is distributed into the combustion chamber via the outlet holes.
  • the quantity-determining cross sections for the fuel and the atomizing medium are upstream of the mixing chamber and the outlet bores. This means that the pressure is converted into speed on the material of the nozzle and in two stages. If the liquid fuel contains solid parts, for example in the form of a coal dust oil or water suspension, the solid parts have an abrasive effect on the narrowest cross section. The wear caused by this shortens the life of the nozzle heads of the burners.
  • the invention has for its object to design a generic burner such that the wear of the inner parts of the nozzle head is reduced.
  • the speeds in the channel carrying fuel are so low that significant wear is not expected.
  • the quantity-determining cross section of the atomizing medium is fed in the form of a hollow cylinder, which enveloping uel stream wraps around the liquid B.
  • the liquid fuel is thus drawn into the high-speed stream of the atomizing medium and mixed in, the edge zones of the quantity-determining cross section being acted upon primarily by the atomizing medium.
  • the quantity of the fuel is determined in the free flow of the atomizing medium without the liquid fuel with the solid components contained in it coming into contact with the metallic walls within the quantity-determining cross-section to any appreciable extent.
  • the drawing shows a longitudinal section through the nozzle head of a burner according to the invention.
  • the burner shown contains a lance tube 1, on the front end of which a nozzle head is attached.
  • a supply tube 2 is arranged within the lance tube 1 and surrounds a channel 3 for guiding the liquid fuel.
  • the liquid fuel can contain solid fractions and can be, for example, oil, a coal dust oil or a coal dust water suspension.
  • a channel 4 for the supply of an atomizing medium for example steam, compressed air or gas, is formed.
  • the channel 3 for guiding the fuel and the channel 4 for guiding the atomizing medium can also be arranged parallel to one another.
  • the inner nozzle parts are firmly clamped by a nozzle holder 5 attached to the lance tube 1 and a nozzle holder 6.
  • the downstream part of the fuel-carrying channel 3 is formed by a fuel chamber 7, the cross section of which is narrowed in the burner shown for constructional reasons compared to the clear cross section of the feed pipe 2.
  • the velocity of the flowing fuel is then necessarily slightly increased in this fuel chamber, but its cross-section does not determine the quantity.
  • the fuel chamber 7 is surrounded concentrically by a collecting chamber 8, which is connected to the channel 4 carrying the atomizing medium via a plurality of radial bores 9.
  • the collecting space 8 merges via a conical annular channel 10 into a premixing chamber 11, which is followed downstream by a mixing section 12 with a narrowest cross section.
  • This mixing section 12 lies in the same axis as the fuel chamber 7. It is flowed through by both the fuel and the atomizing medium and is therefore quantity-determining for both media.
  • a post-mixing chamber 13 is arranged downstream of the mixing section 12, in which the fuel and the atomizing medium are further mixed to form an emulsion.
  • the front end of the nozzle head is closed and receives a blind hole 14 from which exit bores 15 extend. These outlet bores 15 are arranged so that their inlet cross-sections are at a distance from the closed bottom of the nozzle head which corresponds to at least half the diameter of the blind hole 13, thereby creating a buffer zone.
  • the design of the conical annular channel 10 leads the atomizing medium through the mixing section 12 in a hollow cylindrical manner.
  • the fuel is drawn into the high speed stream of the atomizing medium and thereby mixed into the atomizing medium.
  • the atomizing medium lies against the edge zone of the mixing section 12 while the fuel is wrapped. In this way, wear of the mixing section 12 due to solid components that may be contained in the liquid fuel is largely reduced.
  • the arrangement of the blind hole 14 in the nozzle head ensures that in the flow of the emulsion of fuel and atomizing medium leaving the mixing section 12 and the post-mixing chamber 13, a back pressure occurs, by means of which the axial flow is braked.
  • the distribution of the emulsion over the cross section of the outlet bores 14 is thus much more uniform than in the case of nozzles without a blind hole, as a result of which the service life of the nozzle head is extended.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Nozzles For Spraying Of Liquid Fuel (AREA)
EP85101685A 1984-07-18 1985-02-15 Brûleur pour combustibles liquides, particulièrement pour combustibles avec des corps solides Expired EP0172303B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85101685T ATE34446T1 (de) 1984-07-18 1985-02-15 Brenner fuer fluessige, insbesondere feste anteile enthaltende brennstoffe.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843426488 DE3426488A1 (de) 1984-07-18 1984-07-18 Brenner fuer fluessige, insbesondere feste anteile enthaltende brennstoffe
DE3426488 1984-07-18

Publications (2)

Publication Number Publication Date
EP0172303A1 true EP0172303A1 (fr) 1986-02-26
EP0172303B1 EP0172303B1 (fr) 1988-05-18

Family

ID=6240972

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85101685A Expired EP0172303B1 (fr) 1984-07-18 1985-02-15 Brûleur pour combustibles liquides, particulièrement pour combustibles avec des corps solides

Country Status (3)

Country Link
EP (1) EP0172303B1 (fr)
AT (1) ATE34446T1 (fr)
DE (2) DE3426488A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0299757A2 (fr) * 1987-07-14 1989-01-18 The Babcock & Wilcox Company Pulvérisateurs
EP0565814A2 (fr) * 1992-04-13 1993-10-20 LLB Lurgi Lentjes Babcock Energietechnik GmbH Chalumeau pour pulvériser une suspension charbon-eau

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE53249T1 (de) * 1986-07-14 1990-06-15 Ente Naz Energia Elettrica Zerstaeuber fuer einen brenner fuer fluessigen brennstoff.
JP2581626B2 (ja) * 1991-10-02 1997-02-12 日本メンテ開発株式会社 コンクリート補修剤注入プラグ
EP0586912A3 (fr) * 1992-09-08 1994-11-30 Man Nutzfahrzeuge Ag Buse de pulvérisation.

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT38113B (de) * 1908-08-31 1909-07-26 Oesterreichische Maschb Aktien Brenner für Ölfeuerung.
AT48502B (de) * 1910-03-05 1911-06-10 Martin Domiszewski Düsenbrenner für mit flüssigem Brennstoff betriebene Feuerungen.
US1071381A (en) * 1912-07-13 1913-08-26 David V Sutton Liquid-fuel burner.
EP0026509B1 (fr) * 1979-10-02 1983-10-12 Shell Internationale Researchmaatschappij B.V. Procédé pour la combustion partielle du combustible solide et brûleur pour la mise en oeuvre du procédé

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT38113B (de) * 1908-08-31 1909-07-26 Oesterreichische Maschb Aktien Brenner für Ölfeuerung.
AT48502B (de) * 1910-03-05 1911-06-10 Martin Domiszewski Düsenbrenner für mit flüssigem Brennstoff betriebene Feuerungen.
US1071381A (en) * 1912-07-13 1913-08-26 David V Sutton Liquid-fuel burner.
EP0026509B1 (fr) * 1979-10-02 1983-10-12 Shell Internationale Researchmaatschappij B.V. Procédé pour la combustion partielle du combustible solide et brûleur pour la mise en oeuvre du procédé

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0299757A2 (fr) * 1987-07-14 1989-01-18 The Babcock & Wilcox Company Pulvérisateurs
JPS6434459A (en) * 1987-07-14 1989-02-03 Babcock & Wilcox Co Two fluid atomizer
EP0299757A3 (en) * 1987-07-14 1990-01-17 The Babcock & Wilcox Company Atomisers
EP0565814A2 (fr) * 1992-04-13 1993-10-20 LLB Lurgi Lentjes Babcock Energietechnik GmbH Chalumeau pour pulvériser une suspension charbon-eau
EP0565814A3 (en) * 1992-04-13 1993-11-24 Babcock Energie Umwelt Burner torch for pulverising a coal-water suspension

Also Published As

Publication number Publication date
DE3426488A1 (de) 1986-01-30
ATE34446T1 (de) 1988-06-15
DE3562818D1 (en) 1988-06-23
EP0172303B1 (fr) 1988-05-18

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