EP0288855A2 - Installation d'un brûleur à deux combustibles avec un pulvérisateur de l'huile combustible - Google Patents

Installation d'un brûleur à deux combustibles avec un pulvérisateur de l'huile combustible Download PDF

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Publication number
EP0288855A2
EP0288855A2 EP88106124A EP88106124A EP0288855A2 EP 0288855 A2 EP0288855 A2 EP 0288855A2 EP 88106124 A EP88106124 A EP 88106124A EP 88106124 A EP88106124 A EP 88106124A EP 0288855 A2 EP0288855 A2 EP 0288855A2
Authority
EP
European Patent Office
Prior art keywords
atomizer
resonator
oil
cone
resonance
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Withdrawn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
EP88106124A
Other languages
German (de)
English (en)
Other versions
EP0288855A3 (fr
Inventor
Cornel Füglistaller
Jakob Dr. Keller
Thomas Dr. Sattelmayer
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.)
BBC Brown Boveri AG Switzerland
Original Assignee
BBC Brown Boveri AG Switzerland
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 BBC Brown Boveri AG Switzerland filed Critical BBC Brown Boveri AG Switzerland
Publication of EP0288855A2 publication Critical patent/EP0288855A2/fr
Publication of EP0288855A3 publication Critical patent/EP0288855A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D17/00—Burners for combustion simultaneously or alternately of gaseous or liquid or pulverulent fuel
    • F23D17/002—Burners for combustion simultaneously or alternately of gaseous or liquid or pulverulent fuel gaseous or liquid fuel
    • 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
    • F23D11/005—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space with combinations of different spraying or vaporising means
    • 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
    • F23D2900/00008—Burner assemblies with diffusion and premix modes, i.e. dual mode burners

Definitions

  • the present invention relates to a dual burner device with a fuel oil atomizer, in which a combustion air duct, a premix gas line with premix gas nozzles, a diffusion gas line with diffusion gas nozzles, an atomizing air line which opens into an inlet funnel of the atomizer, and an oil feed line with an oil nozzle are arranged within a burner housing coaxially with one another. wherein the oil nozzle also opens into the inlet funnel and this has an external thread, which is used for connection to the atomizing air line and for receiving a housing part of the atomizer.
  • the present invention arose from the object of realizing an improvement in the degree of atomization of the liquid fuel which can be achieved with the burner devices customary today, in a burner device, in particular in dual burners with gas and oil as fuels.
  • a burner device in particular in dual burners with gas and oil as fuels.
  • the inside of a nozzle body from which the liquid fuel mixed with the atomizing air, hereinafter referred to as fuel oil or oil, is injected into a combustion chamber or a combustion chamber, should be designed as a resonance chamber in which strong, high-frequency pressure pulsations occur. which considerably increase the liquid breakdown when the two-phase fuel oil / air mixture emerges into the combustion chamber.
  • measurements have shown that the average droplet size in such a burner device was 50-70% smaller than that measured on two comparison burners of a known type.
  • the dual burner device is characterized in that the fuel oil atomizer is designed as a resonance atomizer, with a resonator ring which has an annular groove on a hollow conical surface, and a resonator cone which has an annular groove on an outer conical surface, which two annular grooves delimit a resonance chamber, which is via an annular inflow channel communicates with a cavity on the oil nozzle side and via outflow channels with a combustion chamber connected downstream of the burner device, and that a baffle plate is arranged in the extension of the oil nozzle.
  • FIG. 1 shows the head of a burner device for dual operation with fuel oil and gas, insofar as it is essential for the understanding of the invention.
  • a burner housing 1 accommodates the elements for supplying the combustion and atomizing air, the fuel gas and the fuel oil as well as the oil nozzle and the resonance atomizer.
  • Within the housing 1 there is a combustion air duct 2 coaxial with the housing axis, which tapers at its mouth to form an annular nozzle surrounding the resonance atomizer 4.
  • the flow arrows 3 symbolize the combustion air.
  • the innermost channel is an oil supply line 6, which ends in an oil nozzle 7 in the burner head.
  • the oil supply line 6 is surrounded by an atomizing air line 8, onto which a diffusion gas line device 9 follows, from which diffusion gas flows through a plurality of diffusion gas nozzles 10 distributed over the circumference into the mouth region of the combustion air duct 2.
  • a diffusion gas line device 9 onto which a diffusion gas line device 9 follows, from which diffusion gas flows through a plurality of diffusion gas nozzles 10 distributed over the circumference into the mouth region of the combustion air duct 2.
  • the incoming combustion air is already mixed with premix gas during part-load operation, which premixed gas emerges from a premix gas line 11, which is located radially outward, through a series of premix gas nozzles 12 distributed over the circumference into the combustion air channel 2.
  • both nozzles deliver gas components in accordance with the respective requirements.
  • the resonance atomizer 4 shown in larger scale in FIGS. 2 to 4 than in FIG. 1. It has an inlet funnel for the atomizing air symbolized by the flow arrows 14. This inlet funnel is provided with an external thread 15, with which, as can be seen from FIG. 1, it is screwed into the atomizing air line 8 when the resonance atomizer is assembled. This line 8 is drawn in broken lines in FIG. 2.
  • a resonator ring 16 which is screwed onto the external thread 15 and thereby clamps an atomizer cross 17 with, for example, four radial arms 18 and a baffle plate 19, is braced with an outer cone chamfer 20 against an inner cone surface 21 of the atomizing air line 8 corresponding to the same.
  • the atomizer cross 17 On the opposite side of the baffle plate 19, the atomizer cross 17 has a threaded pin 22 onto which a resonator cone 23 is screwed.
  • This resonator cone and the resonator ring 16 are provided with ring grooves 24 and 25, which in the assembled state form a resonance chamber of essentially rectangular cross section.
  • the resonator ring 16 has at the outer end of its inner cone, that is, outside the annular groove 25, three spacer webs 26, which are evenly distributed on the circumference and are of the width shown in FIG
  • the fuel oil emerging from the oil nozzle 7 strikes the baffle plate 19 and is distributed over its circumference.
  • An oil film is formed on the edge of the plate and enters the atomizing air flowing coaxially around the oil supply line 6.
  • the oil film is torn and the oil / air mixture passes after the atomizer cross 17 via the inflow channel 27 into the resonance chamber 24 + 25, in which strong, high-frequency pressure pulsations of the air / fuel oil mixture occur, which cause the liquid to disintegrate when the mixture emerges from the considerably amplify three outflow channels 28 in the combustion air flow. 4, the mixture emerging from the channels 28 is indicated by radial arrows.
  • the spacer webs 26 also contribute to the turbulence in the combustion chamber as a resistance body, in that part of the emerging mixture is deflected laterally.
  • the present design results in a significantly better atomization with the same effort for providing the atomizing air.
  • measurements in the atomizer according to the invention showed a reduction in the mean droplet size by up to 50%.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pressure-Spray And Ultrasonic-Wave- Spray Burners (AREA)
  • Nozzles For Spraying Of Liquid Fuel (AREA)
EP88106124A 1987-04-30 1988-04-18 Installation d'un brûleur à deux combustibles avec un pulvérisateur de l'huile combustible Withdrawn EP0288855A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3714408 1987-04-30
DE19873714408 DE3714408A1 (de) 1987-04-30 1987-04-30 Dualbrennereinrichtung mit einem brennoelzerstaeuber

Publications (2)

Publication Number Publication Date
EP0288855A2 true EP0288855A2 (fr) 1988-11-02
EP0288855A3 EP0288855A3 (fr) 1990-01-17

Family

ID=6326578

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88106124A Withdrawn EP0288855A3 (fr) 1987-04-30 1988-04-18 Installation d'un brûleur à deux combustibles avec un pulvérisateur de l'huile combustible

Country Status (3)

Country Link
US (1) US4838783A (fr)
EP (1) EP0288855A3 (fr)
DE (1) DE3714408A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5628448A (en) * 1993-09-20 1997-05-13 Siemens Aktiengesellschaft Process for bonding a contact layer of silver-metal oxide material and metal contact base, and suitable contact layer

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19618058B4 (de) * 1996-05-06 2008-12-04 Alstom Brenner
EP2312215A1 (fr) * 2008-10-01 2011-04-20 Siemens Aktiengesellschaft Brûleur et procédé de fonctionnement d'un brûleur

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT17030B (de) * 1903-05-23 1904-07-25 Siemens Ag Elektrisch und durch Luftdruck gesteuerte Luftbremse.
US3147795A (en) * 1961-12-27 1964-09-08 Combustion Eng Burner utilizing an eddy plate for proper mixing of fuel and air
DE1551648C3 (de) * 1966-01-19 1979-12-13 Dumag Ohg, Dr.Techn. Ludwig Kaluza & Co, Wien Zerstäubungsbrenner für flüssigen Brennstoff
GB1151620A (en) * 1967-12-29 1969-05-14 Shell Int Research Burner
GB1284439A (en) * 1969-12-09 1972-08-09 Rolls Royce Fuel injector for a gas turbine engine
US3822654A (en) * 1973-01-08 1974-07-09 S Ghelfi Burner for burning various liquid and gaseous combustibles or fuels
US3929290A (en) * 1974-10-10 1975-12-30 Babcock & Wilcox Co Fuel atomizer
RO66212A2 (fr) * 1975-03-19 1978-04-15 Inst Pentru Creatie Stintific Procede de combustion et bruleurs pour combustible liquid
US4098255A (en) * 1976-09-07 1978-07-04 Thermo Electron Corporation Dual fuel radiant tube burner
US4375954A (en) * 1979-12-26 1983-03-08 Roger Trudel Oil and gas combination nozzle
DE3166989D1 (en) * 1980-10-29 1984-12-06 Bbc Brown Boveri & Cie Resonant chamber atomiser for liquids
DE3132948C2 (de) * 1981-08-20 1984-07-19 Kraft Hausherr GmbH & Co KG, 4322 Sprockhövel Brenneraustrittskopf für einen Brenner für flüssige Brennstoffe
JPS60126511A (ja) * 1983-12-09 1985-07-06 Haruji Kurogo 霧化を促進し燃焼を改善するバ−ナ−・チップ装置
DE3669915D1 (de) * 1986-11-27 1990-05-03 Fluidics Instr Bv Druckluftzerstaeuberduese.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5628448A (en) * 1993-09-20 1997-05-13 Siemens Aktiengesellschaft Process for bonding a contact layer of silver-metal oxide material and metal contact base, and suitable contact layer

Also Published As

Publication number Publication date
US4838783A (en) 1989-06-13
DE3714408A1 (de) 1988-11-10
EP0288855A3 (fr) 1990-01-17

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