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US20060003275A1 - Burner, particularly for liquid or gaseous fuels - Google Patents

Burner, particularly for liquid or gaseous fuels Download PDF

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Publication number
US20060003275A1
US20060003275A1 US10/507,260 US50726005A US2006003275A1 US 20060003275 A1 US20060003275 A1 US 20060003275A1 US 50726005 A US50726005 A US 50726005A US 2006003275 A1 US2006003275 A1 US 2006003275A1
Authority
US
United States
Prior art keywords
catchment element
burner
catchment
inflow
control
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.)
Abandoned
Application number
US10/507,260
Other languages
English (en)
Inventor
Roland Oehm
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of US20060003275A1 publication Critical patent/US20060003275A1/en
Abandoned 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
    • F23C7/008—Flow control devices
    • 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
    • F23D11/406—Flame stabilising means, e.g. flame holders
    • 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
    • F23D2900/11402—Airflow diaphragms at burner nozzle
    • 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
    • F23D2900/11403—Flame surrounding tubes in front of burner nozzle

Definitions

  • the invention relates to a burner, particularly for liquid or gaseous fuels, having a fuel nozzle which is centrally disposed in a burner pipe and surrounded by a catchment element also disposed in the burner pipe, which element separates the combustion air that is fed through the burner pipe into a central main stream that flows through the catchment element, and a secondary stream that flows around the catchment element, whereby the main stream and the secondary stream are brought together again behind the fuel nozzle, in the region of the burner flame.
  • the catchment element is adjustable relative to the burner pipe and the fuel nozzle.
  • the cross-sections for the main stream and the secondary stream change at the same time, whereby the position of the catchment element relative to the fuel nozzle also changes at the same time.
  • the simultaneous change in the two passage cross-sections, with the simultaneous change in the position of the catchment element relative to the fuel nozzle is disadvantageous, because the fuel nozzle, which lies in the main stream, requires fixed cross-section conditions and, in particular, an unchanging spatial constellation between the fuel nozzle and the catchment element, for optimal operation.
  • the invention proposes, proceeding from the burner of the type stated initially, that the catchment element is arranged stationary relative to the fuel nozzle, has the shape of the shell of a double truncated cone, and leaves a flow cross-section for the main stream that first narrows and then widens again, as well as a flow cross-section for the secondary flow that first widens and then narrows again, whereby the upper edge and the lower edge of the catchment element form control edges, and the catchment element is surrounded by a pipe-shaped annular throttle that is movable in an axial direction in the burner pipe, which throttle has two control collars that protrude towards the inside and are located across from the control edges of the catchment element, to control the amount of combustion air that is transported in the secondary stream.
  • the geometrical relationships in the region of the fuel nozzle remain essentially the same, in particularly advantageous manner.
  • the main stream accelerates at first, until it reaches its greatest speed in the region of the center of the shell of the double-truncated cone, i.e. just ahead of the fuel nozzle.
  • the fuel exiting from the fuel nozzle is swirled particularly well, and thoroughly mixed with combustion air, so that a flame that burns in stable manner, to a great extent, is formed, which exits from the catchment element at the end of the latter.
  • the flow conditions are the opposite.
  • a high flow velocity first occurs, between the control collar of the annular throttle and the intake-side control edge of the catchment element, and this subsequently slows down accordingly in the widening flow cross-section, thereby building up higher static pressure there.
  • the combustion air transported in the secondary stream is accelerated again, in order to pass through between the control edge of the catchment element on the outflow side, and the related control collar of the annular throttle. Behind this narrowest cross-section on the outflow side, this combustion air mixes with the combustion air transported in the main stream, and here assures complete combustion, without residues.
  • the inflow-side control edge of the catchment element and the inflow-side control collar of the annular throttle lie close to one another. In this way, the result is achieved that in the “start” position, almost all of the combustion air reaches the fuel nozzle by way of the main stream, so that there, particularly intensive atomization of the fuel occurs, thereby facilitating the ignition and start of the burner.
  • Another important characteristic of the invention provides that in the “open” position (normal operation), the control edges of the catchment element and the control collars of the annular throttle that lie opposite them leave passage gaps between them of approximately the same size, whereby the inflow-side control collar of the annular throttle lies ahead of the inflow-side control edge of the catchment element, seen in the flow direction.
  • the control edges of the catchment element and the control collars of the annular throttle that lie opposite them leave passage gaps between them of approximately the same size, whereby the inflow-side control collar of the annular throttle lies ahead of the inflow-side control edge of the catchment element, seen in the flow direction.
  • Another important characteristic of the invention provides that in the “full load” position, the gap left between the inflow-side control edge of the throttle element and the related control collar of the annular throttle is smaller than the gap left between the outflow-side control edge of the catchment element and the related control collar of the annular throttle, whereby the inflow-side control collar of the annular throttle lies behind the inflow-side control edge of the catchment element, seen in the flow direction.
  • FIG. 1 in a fundamental diagram, a longitudinal cross-section through the burner according to the invention, in the “open” position (normal operation);
  • FIG. 2 in the same representation as FIG. 1 , the burner according to the invention in the “start” position;
  • FIG. 3 in the same representation as FIG. 1 , the burner according to the invention in the “full load” position.
  • the burner pipe which is graduated in diameter, is indicated with the reference symbol 1 .
  • a fuel nozzle 2 is disposed centrally in the burner pipe, and supplied with liquid or gaseous fuel by a central feed pipe 3 .
  • the burner pipe 1 is supported on the central feed pipe 3 by means of radially running spokes 4 and 5 .
  • the fuel nozzle 2 is provided with an electrical ignition mechanism 6 , which serves to ignite the burner flame.
  • a catchment element 7 is rigidly connected with the fuel nozzle 2 .
  • This catchment element 7 has the shape of a shell of a double-truncated cone and surrounds the fuel nozzle 2 concentrically.
  • the catchment element 7 in turn is surrounded by an essentially cylindrical annular throttle 8 that is movable in an axial direction inside the burner pipe.
  • a displacement drive not shown, which passes through an opening 9 in the burner pipe, serves to move the annular throttle 8 axially.
  • the secondary stream of the combustion air runs between the outside of the catchment element 7 and the inside of the annular throttle 8 , which is provided with control collars 8 a and 8 b that protrude radially towards the inside and correspond to the control edges 7 a and 7 b of the catchment element 7 .
  • the particular shape of the catchment element 7 in interaction with the shape of the annular throttle 8 , results in a flow cross-section for the secondary stream that first widens and then narrows again, the inflow and outflow of which is controlled by the control edges 7 a and 7 b and the control collars 8 a and 8 b.
  • a fuel injection 12 that is assigned to the ignition mechanism 6 is located in the upper end of the catchment element 7 ; this facilitates the ignition process.
  • the annular throttle 8 is in the “open” position (normal operation), in which the control edges 7 a and 7 b of the catchment element 7 and the control collars 8 a and 8 b of the annular throttle 8 that lie across from them leave passage gaps between them of approximately the same size, whereby the inflow-sid control collar 8 a of the annular throttle lies in front of the inflow-side control edge 7 a of the catchment element 7 , seen in the flow direction.
  • This position particularly intensive recirculation of combustion air takes place, as is indicated by the arrow 11 .
  • the annular throttle 8 is in the “closed” position, in which the inflow-side control edge 7 a of the catchment element 7 and the inflow-side control collar 8 a of the annular throttle 8 lie next to one another. In this position, the secondary stream is throttled down to almost zero, and the entire combustion air flows in the main stream, resulting in particularly fine atomization of the fuel, thereby facilitating the ignition process.
  • FIG. 3 shows the throttle element 8 in the “full load” position, in which the gap left between the inflow-side control edge 7 a of the catchment element 7 and the related control collar 8 a of the annular throttle 8 is smaller than the gap left between the outflow-side control edge 7 b of the catchment element 7 and the related control collar 8 b of the annular throttle 8 , whereby the inflow-side control collar 8 b of the annular throttle 8 lies behind the inflow-side control edge 7 a of the catchment element 7 , seen in the flow direction.
  • This position particularly intensive and thorough mixing of the main stream and the secondary stream takes place, so that complete combustion is guaranteed even under full load.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pre-Mixing And Non-Premixing Gas Burner (AREA)
  • Pressure-Spray And Ultrasonic-Wave- Spray Burners (AREA)
US10/507,260 2002-03-12 2003-03-12 Burner, particularly for liquid or gaseous fuels Abandoned US20060003275A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10210732.7 2002-03-12
DE10210732 2002-03-12
PCT/EP2003/002542 WO2003076846A1 (fr) 2002-03-12 2003-03-12 Bruleur destine notamment a des combustibles liquides ou gazeux

Publications (1)

Publication Number Publication Date
US20060003275A1 true US20060003275A1 (en) 2006-01-05

Family

ID=27797683

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/507,260 Abandoned US20060003275A1 (en) 2002-03-12 2003-03-12 Burner, particularly for liquid or gaseous fuels

Country Status (3)

Country Link
US (1) US20060003275A1 (fr)
AU (1) AU2003215658A1 (fr)
WO (1) WO2003076846A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10281140B2 (en) 2014-07-15 2019-05-07 Chevron U.S.A. Inc. Low NOx combustion method and apparatus
BE1025856B1 (nl) * 2017-12-29 2019-07-30 Europem Technologies Nv Brander voor een afvalverbrandingssysteem

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2888899A1 (fr) * 2005-07-21 2007-01-26 Egci Pillard Sa Ensemble de conduites annulaires et bruleur comprenant un tel ensemble
DE102006031868B4 (de) * 2006-07-10 2009-07-30 Webasto Ag Brennervorrichtung
CN101280922B (zh) * 2006-11-07 2010-06-09 河北宏业机械股份有限公司 一种燃油加热器的锥盖形燃烧器

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3700376A (en) * 1970-12-28 1972-10-24 Babcock & Wilcox Ag Oil burner
US4201538A (en) * 1976-12-27 1980-05-06 Max Weishaupt Gmbh Large burners, particularly for liquid fuels
US4201539A (en) * 1978-01-03 1980-05-06 Coen Company, Inc. Flame forming burner
US4303386A (en) * 1979-05-18 1981-12-01 Coen Company, Inc. Parallel flow burner
US4600377A (en) * 1985-05-29 1986-07-15 Cedarapids, Inc. Refractoriless liquid fuel burner

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1255497A (fr) * 1960-01-29 1961-03-10 Sicma Soc Pour L Installation Tête de combustion pour brûleurs à combustibles liquides ou gazeux
FR1479242A (fr) * 1965-08-18 1967-05-05 Swan Dispositifs de mélange de fluides
DE1751274A1 (de) * 1968-05-02 1971-07-08 Kraftwerksanlagenbau Veb K Luftleiteinrichtung fuer OEl- oder Gasbrenner
GB2205934A (en) * 1987-06-16 1988-12-21 Stirling Power Systems Corp Burner for a hot-gas engine
DE19610106A1 (de) 1996-03-15 1997-09-18 Holzschuh Gmbh & Co Kg Anordnung zur Fernsteuerung eines Elektromotors, insbesondere für einen Heiz- und Gebläselüfter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3700376A (en) * 1970-12-28 1972-10-24 Babcock & Wilcox Ag Oil burner
US4201538A (en) * 1976-12-27 1980-05-06 Max Weishaupt Gmbh Large burners, particularly for liquid fuels
US4201539A (en) * 1978-01-03 1980-05-06 Coen Company, Inc. Flame forming burner
US4303386A (en) * 1979-05-18 1981-12-01 Coen Company, Inc. Parallel flow burner
US4600377A (en) * 1985-05-29 1986-07-15 Cedarapids, Inc. Refractoriless liquid fuel burner

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10281140B2 (en) 2014-07-15 2019-05-07 Chevron U.S.A. Inc. Low NOx combustion method and apparatus
BE1025856B1 (nl) * 2017-12-29 2019-07-30 Europem Technologies Nv Brander voor een afvalverbrandingssysteem

Also Published As

Publication number Publication date
AU2003215658A1 (en) 2003-09-22
WO2003076846A1 (fr) 2003-09-18

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Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION