EP0117472B1 - Atomizer for a liquid fuel burner - Google Patents

Atomizer for a liquid fuel burner Download PDF

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Publication number
EP0117472B1
EP0117472B1 EP84101430A EP84101430A EP0117472B1 EP 0117472 B1 EP0117472 B1 EP 0117472B1 EP 84101430 A EP84101430 A EP 84101430A EP 84101430 A EP84101430 A EP 84101430A EP 0117472 B1 EP0117472 B1 EP 0117472B1
Authority
EP
European Patent Office
Prior art keywords
mixing chamber
chamber
atomizer
inlet means
liquid fuel
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.)
Expired
Application number
EP84101430A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0117472A3 (en
EP0117472A2 (en
Inventor
Mario Graziadio
Sergio Ligasacchi
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.)
Enel SpA
Original Assignee
Enel SpA
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 Enel SpA filed Critical Enel SpA
Priority to AT84101430T priority Critical patent/ATE34445T1/de
Publication of EP0117472A2 publication Critical patent/EP0117472A2/en
Publication of EP0117472A3 publication Critical patent/EP0117472A3/en
Application granted granted Critical
Publication of EP0117472B1 publication Critical patent/EP0117472B1/en
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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
    • B05B7/0416—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid
    • B05B7/0441—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid with one inner conduit of liquid surrounded by an external conduit of gas upstream the mixing chamber
    • B05B7/0475—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid with one inner conduit of liquid surrounded by an external conduit of gas upstream the mixing chamber with means for deflecting the peripheral gas flow towards the central liquid flow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
    • B05B7/0892—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point the outlet orifices for jets constituted by a liquid or a mixture containing a liquid being disposed on a circle
    • 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 present invention relates to an atomizer for a liquid fuel burner.
  • the invention relates to an atomizer suitable to a burner for high viscosity liquid fuels or two two-phase mixtures such, for instance, coal-fuel oil or coal-water, having high viscosity and, in either case, by the assistance of air or steam as an atomizing fluid.
  • Atomizers for liquid fuels are known that are able to achieve an energetic exchange of energy between the fuel and the atomizing fluid, known as "y-jet” atomizers; atomizers of liquid fuels are known too that are able to achieve a modest exchange of energy between the fuel and the atomizing fluid, known as "internal mixing” atomizers.
  • atomizers there is the one disclosed by the patent FR-A-2 212 497 which shows a first mixing chamber receiving at the rear end wall liquid fuel and atomizing fluid through separate ducts; in the first mixing chamber the liquid fuel undergoes partial atomization; the complete atomization is achieved in a second mixing chamber bearing a plurality of openings for delivering the atomized fuel to a firebox.
  • the known atomizers are not adapted to conveniently atomize high viscosity liquid fuels.
  • the atomizer as claimed intends to remedy this drawback.
  • the invented atomizer comprises in a known way a first mixing chamber, a second mixing chamber, first inlet means for delivering to said first mixing chamber a liquid fuel and defining a passage for admission of liquid fuel into said first chamber, said passage further having a length substantially exceeding the length of said first chamber, second inlet means for delivering atomizing fluid to said first mixing chamber, said second chamber communicating with and being arranged to receive partially atomized fuel from said first mixing chamber as well as to effect additional atomization of such liquid fuel, said second mixing chamber having a cross-sectional area several times that of said first mixing chamber.
  • the atomizer is characterized in that said first inlet means have a cross sectional area greatly exceeding the cross sectional area of said first mixing chamber, a circular chamber is interposed between a plurality of-with respect to the cross sectional are OF SAID SECOND INLET MEANS (4)-narrow end passages in said second inlet means and the first ends of a plurality of peripheral ducts the second ends of which open in the cylindrical wall of said first mixing chamber, the ratio between the length and the diameter of said second mixing chamber is about 1,5.
  • the slope of the peripheral ducts with respect to the longitudinal axis of said first mixing chamber is of between 35° and 90° and the slope of the axis of each said outlet means with respect to same axis is of between 20° and 60°.
  • the dimensions of the parts of the atomizer depend upon the characteristics of the fuel and of the atomizing fluid, upon the viscosity of the liquid fuel and type of atomizing fuel and said dimensions may be optimized by experimental methods.
  • the advantages of the invented atomizer reside in the first inlet means cross-sectional area greatly exceeding the first mixing chamber cross-sectional area; the atomizing fluid entering the first mixing chamber through the cylindrical wall of same chamber, well angled to the longitudinal axis; the comparable dimensions of diameter and extension of the second mixing chamber; the whole of said features causing a well atomized fuel pencil in a boiler firebox.
  • the figure 1 shows an atomizer 1 mounted on the end of a device 2 comprising a first inlet means 3 for the delivery of a liquid fuel and a second inlet means 4 for the delivery of an atomizing fluid.
  • the second inlet means 4 communicates with a chamber 5 of the device 2 by passages 6.
  • the atomizer 1 is urged on the device 2 by means of the ring nut 7 screwed on a thread of the device 2.
  • the atomizer 1 comprises a first mixer 8 which bears a first mixing chamber 9 in communication and coaxial with the first inlet means 3 and a plurality of peripheral ducts 10 the first ends of which face the chamber 5 and the second ends of which face the inside ofthefirst mixing chamber 9, the axis of each of the ducts 10 and the axis A-A of the first mixing chamber 9 forming an angle a of about 60°, and comprises a second mixer 11 which bears a second mixing chamber 12, the aperture of which faces concentrically the first mixing chamber 9, and a wall 13 bearing a plurality of outlet means 14, the axis of each outlet means 14 and the axis A-A of the first mixing chamber 9 forming an angle ⁇ of about 20°.
  • the figure 2 shows the front end of the device 2 together with the chamber 5, passages 6, ring nut 7 and duct 3.
  • the figure 3 shows the front of the first mixer 8 together with the first mixing chamber 9, ring nut 7, and the plurality of peripheral ducts 10.
  • the figure 4 shows the front of the atomizer 1 together with the second mixer 11, ring nut 7 and the plurality of outlet means 14 in the wall 13.
  • the figure 1 also shows some references to the dimensions of the different parts: so, the diameter D1 of the first mixing chamber 9 is about 11 mm, diameter d1 of the peripheral ducts 10 is about 3,5 mm, length L1 of the first mixing chamber 9 is about 14mm, diameter D2 of second mixing chamber 12 is about 20 mm, length L2 of second mixing chamber 12 is about 30 mm, diameter d2 of outlet means 14 is about 4 mm and the length thereof is about 6 mm.
  • the illustrated atomizer is suitable to a coal-water fuel pumped through the first inlet means 3 underthe pressure of about 9 Kg/sq. cm and to air as atomizing fluid pumped through the second outlet means 4 under a pressure of about 11 Kg/ sq.cm.

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)
  • Feeding And Controlling Fuel (AREA)
  • Pressure-Spray And Ultrasonic-Wave- Spray Burners (AREA)
  • Nozzles (AREA)
EP84101430A 1983-02-24 1984-02-13 Atomizer for a liquid fuel burner Expired EP0117472B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84101430T ATE34445T1 (de) 1983-02-24 1984-02-13 Zerstaeuber fuer einen brenner mit fluessigem brennstoff.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1972983 1983-02-24
IT19729/83A IT1161905B (it) 1983-02-24 1983-02-24 Atomizzatore per bruciatore di combustibili liquidi

Publications (3)

Publication Number Publication Date
EP0117472A2 EP0117472A2 (en) 1984-09-05
EP0117472A3 EP0117472A3 (en) 1985-05-22
EP0117472B1 true EP0117472B1 (en) 1988-05-18

Family

ID=11160713

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84101430A Expired EP0117472B1 (en) 1983-02-24 1984-02-13 Atomizer for a liquid fuel burner

Country Status (5)

Country Link
EP (1) EP0117472B1 (enrdf_load_stackoverflow)
JP (1) JPS6036811A (enrdf_load_stackoverflow)
AT (1) ATE34445T1 (enrdf_load_stackoverflow)
DE (1) DE3471360D1 (enrdf_load_stackoverflow)
IT (1) IT1161905B (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103115359A (zh) * 2012-12-15 2013-05-22 中国航天科技集团公司第六研究院第十一研究所 一种雾化高粘流体的气体辅助雾化喷嘴

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3442148A1 (de) * 1984-11-17 1986-05-28 L. & C. Steinmüller GmbH, 5270 Gummersbach Zerstaeuberduese mit aufgesetzter verteilerkappe zur reduzierung der stickoxid-emission bei der verbrennung von fluessigen brennstoffen
EP0248539B1 (en) * 1986-05-07 1992-01-29 Hitachi, Ltd. Atomizer and coal-water slurry fired boiler utilizing the same
DE3671656D1 (de) * 1986-07-14 1990-07-05 Ente Naz Energia Elettrica Zerstaeuber fuer einen brenner fuer fluessigen brennstoff.
US4819878A (en) * 1987-07-14 1989-04-11 The Babcock & Wilcox Company Dual fluid atomizer
GB9522336D0 (en) * 1995-11-01 1996-01-03 Benest Roger S Agricultural and horticultural spraying systems
DE19904395A1 (de) * 1999-02-04 2000-08-17 Steinmueller Gmbh L & C Zerstäuberdüse
RU2230985C1 (ru) * 2003-01-13 2004-06-20 Государственное унитарное предприятие Научно-производственное объединение "Гидротрубопровод" Форсунка для распыливания вязких жидкостей
JP2009014288A (ja) * 2007-07-06 2009-01-22 Hokkaido Olympia Kk バーナ装置
JP5678598B2 (ja) * 2010-11-17 2015-03-04 株式会社Ihi バーナ及び油噴霧チップの製造方法
FR2984995A1 (fr) 2011-12-21 2013-06-28 Air Liquide Dispositif et procede de pulverisation de liquide combustible
US11534780B2 (en) 2017-11-14 2022-12-27 General Electric Company Spray nozzle device for delivering a restorative coating through a hole in a case of a turbine engine
US11161128B2 (en) 2017-11-14 2021-11-02 General Electric Company Spray nozzle device for delivering a restorative coating through a hole in a case of a turbine engine
CN107837595A (zh) * 2017-12-22 2018-03-27 和氟微孔滤芯科技（苏州）有限公司 一种微孔过滤器雾化喷淋装置
CN108580076A (zh) * 2018-04-28 2018-09-28 北京航天发射技术研究所 一种内雾化喷嘴及使用该内雾化喷嘴的内雾化喷头
CN114278935B (zh) * 2021-12-30 2024-06-07 乔治洛德方法研究和开发液化空气有限公司 燃烧器、包括其的燃烧器模块及加热装置
IT202200010448A1 (it) * 2022-05-19 2023-11-19 Dls Lab Srl Dispositivo nebulizzatore

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE24771E (en) * 1960-01-19 Vaporizing and mixing unit
US2149115A (en) * 1936-11-27 1939-02-28 Socony Vacuum Oil Co Inc Oil burner
GB534638A (en) * 1939-09-08 1941-03-12 David Robertson Bruce Improvements in and relating to liquid fuel burners of the injection type
US2879948A (en) * 1956-04-18 1959-03-31 Alfred F Seibel Fuel and gaseous mixing unit
US3650476A (en) * 1968-01-16 1972-03-21 Babcock & Wilcox Co Liquid fuel burner
JPS49107726U (enrdf_load_stackoverflow) * 1972-12-31 1974-09-13
FR2212497B1 (enrdf_load_stackoverflow) * 1972-12-31 1976-11-19 Ishikawajima Harima Heavy Ind
JPS5610169Y2 (enrdf_load_stackoverflow) * 1978-08-29 1981-03-06

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103115359A (zh) * 2012-12-15 2013-05-22 中国航天科技集团公司第六研究院第十一研究所 一种雾化高粘流体的气体辅助雾化喷嘴
CN103115359B (zh) * 2012-12-15 2015-04-08 中国航天科技集团公司第六研究院第十一研究所 一种雾化高粘流体的气体辅助雾化喷嘴

Also Published As

Publication number Publication date
JPH0459524B2 (enrdf_load_stackoverflow) 1992-09-22
EP0117472A3 (en) 1985-05-22
JPS6036811A (ja) 1985-02-26
ATE34445T1 (de) 1988-06-15
EP0117472A2 (en) 1984-09-05
IT1161905B (it) 1987-03-18
DE3471360D1 (en) 1988-06-23
IT8319729A0 (it) 1983-02-24

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