US3315724A - Pilot flame burner, particularly for gases of low flammability - Google Patents

Pilot flame burner, particularly for gases of low flammability Download PDF

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Publication number
US3315724A
US3315724A US471294A US47129465A US3315724A US 3315724 A US3315724 A US 3315724A US 471294 A US471294 A US 471294A US 47129465 A US47129465 A US 47129465A US 3315724 A US3315724 A US 3315724A
Authority
US
United States
Prior art keywords
burner
pilot flame
gases
gas
pilot
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 - Lifetime
Application number
US471294A
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English (en)
Inventor
Eggenstein Horst
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.)
STADT DUSSELDORF VERTRETEN DURCH DEN OBERSTADTDIREKTOR
Original Assignee
STADT DUSSELDORF VERTRETEN DURCH DEN OBERSTADTDIREKTOR
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 STADT DUSSELDORF VERTRETEN DURCH DEN OBERSTADTDIREKTOR filed Critical STADT DUSSELDORF VERTRETEN DURCH DEN OBERSTADTDIREKTOR
Application granted granted Critical
Publication of US3315724A publication Critical patent/US3315724A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23Q—IGNITION; EXTINGUISHING-DEVICES
    • F23Q9/00—Pilot flame igniters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D91/00—Burners specially adapted for specific applications, not otherwise provided for
    • F23D91/02—Burners specially adapted for specific applications, not otherwise provided for for use in particular heating operations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2206/00—Burners for specific applications
    • F23D2206/0094—Gas burners adapted for use in illumination and heating

Definitions

  • PILOT FLAME BURNER for providing a keep-alive flame to ignite a main burner in a furnace, heater or other gas-fired equipment.
  • the invention concerns a pilot flame burner particularly suitable for operating with gases of low ignition speed, i.e. slow inflammability, to operate with a mixture of gas and combustion air supplied to the pilot-burner mouth thnough a mixer tube.
  • pilot flame burners of this type it is sometimes very difficult to obtain a quietly burning pilot flame, especially if the pilot burners are operated with gases of slow inflammability, for example earth gas or gas vaporized from liquids, both having an inflammability far below that of conventional city or utility gas.
  • gases of slow inflammability for example earth gas or gas vaporized from liquids, both having an inflammability far below that of conventional city or utility gas.
  • Such pilot flames consuming only little gas are so instable that they may be blown out already by a slight draft or wind.
  • Such pilot burners therefore, constitute an appreciable source of danger.
  • a protective hood is seated upon the burner mouth of the mixer tube so as to form in front of the burner mouth an enclosure which envelops the pilot flame and is equipped with waste-gas outlet openings substantially at the height of the flame core.
  • the protective hood to be seated upon the burner mouth is preferably given a cylindrical shape, and the waste-gas outlet openings are provided at the end of the hood opposite the burner mouth, namely in the cylindrical Wall as well as in the otherwise closed front end of the hood. If desired, however, the hood may be given a spherical, oval or ellipsoid shape.
  • the pilot flame burner 1 is conventionally provided with an elongated mixer tube 2 which receives gas of relatively low ignition speed, such as earth-gas or gas vaporized from lisuid, through a nozzle 3.
  • gas of relatively low ignition speed such as earth-gas or gas vaporized from lisuid
  • the combustion air enters through an annular gap 5 whose cross section is adjustable by means of a jacket nut 4.
  • the gas and the combustion air then pass through a Venturi nozzle 6 into the mixer tube 2 where they are intimately mixed with each other before they reach the burner mouth 7 at the other end of the mixer tube, to be burned in the pilot flame.
  • a protective hood 8 Placed upon the burner mouth 7 is a protective hood 8 which may be fastened to the mixer tube 2 by means of a threaded flange 9 screwed onto the tube 2 as shown.
  • the hood 8 is cylindrical. Its end remote from, and opposite the burner mouth 7 is provided with several gas outlet openings 9 and 10 which are located in the cylinderical wall 8' as well as in the planar end wall 8" of the hood.
  • the gas outlet openings 9, 10 are preferably of circular shape and their crosssectional area is so large that the flame of the gas-air mixture, when being ignited from the outside of the hood will break through the openings 9, 10 to continue burning at the burner mouth 7 within the chamber formed by the hood.
  • the gas supply through the nozzle 3 is started so that the gas-air mixture passes through the Venturi nozzle 6, the mixer tube 2, the burner mouth 7 and the outlet openings 9, 10 into the environment.
  • the gas-air mixture is ignited at one of the openings 9 or 10, the flame whips inward through the opening into the burner chamber and continues burning quietly in stable operation at the burner mouth 7.
  • the waste gases then escape through the bores 9, 10.
  • the waste gas outlet 10 in the end face 8" of the hood is of particular significance for reliably preventing the accumulation of waste gas and also because it facilitates operating the pilot burner in any desired position without afiecting the stability of its pilot flame. Regardless of any particular wind or draft direction, the waste gases may escape through any one or more of the openings 9, 10.
  • a pilot burner equipped with a hood according to the invention provides a quiet and reliable pilot flame in any position of the burner, that is, regardless of whether the pilot burner is placed upright or in a slanting position or even upside down.
  • the waste gases have been found to be reliably eliminated through at least one of the outlet openings without producing back-pressure, thus securing a reliable burning of the pilot flame at the burner mouth which is enveloped by the protective hood at a suflicient distance from the mouth.
  • a pilot flame burner particularly for gases of slow flammability, comprising a mixer tube with respective gas and air inlet means at one end and a burner mouth at the other end, a substantially cylindrical hood having one axial and ooaxially seated on said burner mouth and extending axially away therefrom so as to form in front of said burner mouth a chamber for enveloping a pilot flame of predetermined maximum length to burn at said month, said hood being closed at the end remote from said burner mouth and having waste-gas outlet openings in the form of bore holes located in said closed end and in the cylinderical wall near said closed end beyond the range of the predetermined maximum length of a pilot flame burnable at said month, said chamber being entirely enclosed by said cylindrical wall for a distance at least equal to said predetermined maximum length from said burner mouth.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
US471294A 1964-07-21 1965-07-12 Pilot flame burner, particularly for gases of low flammability Expired - Lifetime US3315724A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEST022434 1964-07-21

Publications (1)

Publication Number Publication Date
US3315724A true US3315724A (en) 1967-04-25

Family

ID=7459377

Family Applications (1)

Application Number Title Priority Date Filing Date
US471294A Expired - Lifetime US3315724A (en) 1964-07-21 1965-07-12 Pilot flame burner, particularly for gases of low flammability

Country Status (4)

Country Link
US (1) US3315724A (de)
BE (1) BE667159A (de)
DE (1) DE1451479B2 (de)
NL (1) NL6508955A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3574506A (en) * 1968-07-29 1971-04-13 Bernzomatic Corp Blow torch burner
US3580700A (en) * 1968-11-27 1971-05-25 Thayer C Hinckley Burner for cigarette lighter
US20040209213A1 (en) * 2003-04-21 2004-10-21 Wong Ming King Piezoelectric lighter for synchronous flat and torch flames

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE791005A (fr) * 1971-11-10 1973-03-01 Zagoroff Dimiter S Procede et appareillage de chauffage a basse temperature et de contraction de matiere plastique
DE9301909U1 (de) * 1993-02-11 1993-03-25 Elektro- Und Gas-Armaturen-Fabrik Gmbh, 5800 Hagen Gasbrenner

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1074312A (en) * 1901-11-23 1913-09-30 Stamford Gas Stove Company Gas-heater.
US1122944A (en) * 1914-07-11 1914-12-29 James E Kennedy Pilot-burner.
US1617677A (en) * 1927-02-15 Assickctob
US1625630A (en) * 1927-04-19 louis
US2465242A (en) * 1944-09-16 1949-03-22 Dale A Line Gas torch
US2591626A (en) * 1948-12-17 1952-04-01 Peabody Engineering Corp Automatic gas igniter tube for burners

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1617677A (en) * 1927-02-15 Assickctob
US1625630A (en) * 1927-04-19 louis
US1074312A (en) * 1901-11-23 1913-09-30 Stamford Gas Stove Company Gas-heater.
US1122944A (en) * 1914-07-11 1914-12-29 James E Kennedy Pilot-burner.
US2465242A (en) * 1944-09-16 1949-03-22 Dale A Line Gas torch
US2591626A (en) * 1948-12-17 1952-04-01 Peabody Engineering Corp Automatic gas igniter tube for burners

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3574506A (en) * 1968-07-29 1971-04-13 Bernzomatic Corp Blow torch burner
US3580700A (en) * 1968-11-27 1971-05-25 Thayer C Hinckley Burner for cigarette lighter
US20040209213A1 (en) * 2003-04-21 2004-10-21 Wong Ming King Piezoelectric lighter for synchronous flat and torch flames

Also Published As

Publication number Publication date
DE1451479A1 (de) 1969-01-16
DE1451479B2 (de) 1971-12-09
NL6508955A (de) 1966-01-24
BE667159A (de) 1965-11-16

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