US3765824A - Apparatus for determining air flow to a gas burner - Google Patents

Apparatus for determining air flow to a gas burner Download PDF

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Publication number
US3765824A
US3765824A US00278839A US3765824DA US3765824A US 3765824 A US3765824 A US 3765824A US 00278839 A US00278839 A US 00278839A US 3765824D A US3765824D A US 3765824DA US 3765824 A US3765824 A US 3765824A
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United States
Prior art keywords
air
burners
hood
burner
enclosure
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Expired - Lifetime
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US00278839A
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English (en)
Inventor
N Trozzi
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Foster Wheeler Inc
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Foster Wheeler Inc
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    • 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
    • F23D17/00—Burners for combustion simultaneously or alternately of gaseous or liquid or pulverulent fuel

Definitions

  • ABSTRACT An apparatus for determining air flow to one or more burners of a furnace or the like wherein an enclosure is provided which'surrounds the burners and receives air for supply to the burners.
  • a register assembly is provided in the enclosure and cooperates with the burners to direct a predetermined portion of the air to a combustion zone adjacent each of the burners.
  • a static pressure zone is created for the latter portion of air to enable its static pressure to be measured and the air flow to be determined.
  • primary air is normally introduced with the fuel into the combustion zones defined by the burners associated with the furnace, while secondary air is introduced from a different location into the combustion zones to promote the combustion.
  • the secondary air is normally introduced through a windbox associated with the burners and is directed toward the combustion zones by a register assembly.
  • a register assembly In relatively large installations incorporating a plurality of such burners, several problems are involved in the use of this secondary air. For example, since each burner has a different location relative to the secondary air source, and since the registers associated with each burner are usually adjusted to different positions, the actual air flow to each burner can vary. Also, the mass flow effect of the incoming air into the windbox causes uneven distriubtion of air to each burner.
  • the apparatus of the present invention comprises an enclosure surrounding the burner or burners, means for introducing air at a predetermined velocity to said enclosure, register means disposed in said enclosure and cooperating with each burner for directing a predetermined portion of said air to a combustion zone adjacent each burner, means for creating a static pressure zone for said 13 predetermined portion of air, means for measuring the air pressure in said static pressure zone, and means for measuring the air pressure in said enclosure.
  • FIG. 1 is a vertical sectional view showing the apparatus of the present invention in connection with a burner assembly disposed in a furnace section of a vapor generator;
  • FIG. 2 is a cross-sectional view taken along the line 2-2 of FIG. 1;
  • FIG. 3 is an enlarged cross-sectional view taken along the line 3-3 of FIG. 2;
  • FIG. 4 is a reduced perspective view depicting the apparatus of the present invention mounted over a burner assembly.
  • a casing wall 12 cooperates with the fin tube wall 10 to define an interior portion 14, it being understood that the latter is bounded by upper and lower walls, as viewed in FIG. 1, to define an enclosure, or windbox, which receives air'at a predetermined velocity from a source such as a fan (not shown) with the direction of air flow into the interior portion 14 being shown in general by the arrows in FIG. 1.
  • a source such as a fan (not shown) with the direction of air flow into the interior portion 14 being shown in general by the arrows in FIG. 1.
  • An annular insulation collar 16 extends in an opening formed in the fin tube wall 10 with its inner surface defining a combustion zone 18, which extends into the furnace.
  • a burner assembly shown in general by the reference numeral 20, extends through the wall 12 with one end of the assembly extending flush with one end of the collar 16, and with the assembly being supported in a coaxial relationship to the collar by means of a register shown in general by the reference numeral 24.
  • the register 24 comprises a pair of annular mounting plates 26 and 28 disposed in a spaced relationship, with the plate 26 extending over and being secured tothe burner assembly 20.
  • the plate 28 is secured to the collar 16 with their respective openings registering, as shown.
  • a plurality of vanes 30 are journaled between the two mounting plates 26 and 28'and extend around the entire outer periphery defined by the plates 26 and 28.
  • the position of the vanes 30 are adjustable by means of a plurality of cranks 32 operatively connected to each vane in order to direct the air in a particular path towards the combustion zone 18.
  • a hood shown in general by the reference numeral 40, extends over the register 24 and is formed by a pair of spaced annular plates 42 and 44 respectively connected to the mounting plates 26 and 28 by means of a plurality of mounting brackets 46.
  • a circular perforated plate 48 is connected to the ends of the plates 42 and 44 to complete the hood.
  • a pipe 50 extends across the hood 40 and is secured to the plates 42 and 44.
  • the pipe 50 is perforated in its central portion and supports a drum 52, the outer wall of which is also perforated.
  • the right end of the pipe 50 is closed by means of a cap member'54 as viewed in FIG. 3, while the left end is conected to a manometer tube 56 as shown in FIG. 1.
  • perforated plate 48, perforated drum 52, and the corresponding perforated portion of the pipe 50 is to reduce the effect of the velocity pressures on the air entering the hood 40 and thus create an essentially static pressure zone within the pipe 50 to enable the static air pressure to be measured by means of the manometer associated with the tube 56.
  • the air hood 40 has four pipes 50 spaced therearound at equally spaced intervals so that an average value of the air pressures transmitted by their corresponding tubes 56 may be obtained to use in determining the air flow.
  • An additional manometer tube 60 extends through the casing wall 12 for transmitting the static pressure existing in the interior portion 14 to the exterior.
  • the burner assembly is of a conventional design incorporating six gas guns 62, an oil gun 64, and anigniter 66 which operate in a conventional manner to create a continuous flame at the combustion zone 18.
  • burner assembly 20 does not utilize what is known in the art as primary air, since normally this would be associated with solid fuel burning equipment as opposed to liquid or gaseous fuels.
  • the tubes 56 and 60 are connected in a manner so that the average static air pressure in the hood 40 and the static air pressure in the interior portion 14 will enable air flow to the register 24 to be determined.
  • the effect of register position on air flow to the combustion zone can be determined by the pressure differential across the hood.
  • Apparatus for determining air flow to one or more burners of a furnace or the like comprising an-enclosure surrounding said burner, means for introducing air at a predetermined velocity to said enclosure, register means disposed in said enclosure and cooperating with said burner for directing a predetermined portion of said air to a combustion zone adjacent each of said burners, means for creating a static pressure zone for said predetermined portion of air, means for measuring the air pressure in said static pressure zone, and means for measuring the air pressure in said enclosure.
  • said means for creating a static pressure zone comprises a perforated plate mounted relative to said register means in a spaced relation relative to the inlet portion of said register means, and a perforated tubular member mounted between said perforated plate and said inlet.
  • said register means is in the form of an annular housing surrounding each of said burners and having adjustable openings in the outer periphery thereof to direct said predetermined portion of air in a generally radial direction relative to said burner.
  • said means for measuring the air pressure in said static pressure zone comprises a perforated tubular member mounted relative to said hood and extending across said hood between said perforated plate and said inlet to receive a portion of said predetermined portion of air.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Regulation And Control Of Combustion (AREA)
  • Combustion Of Fluid Fuel (AREA)
  • Pressure-Spray And Ultrasonic-Wave- Spray Burners (AREA)
US00278839A 1972-08-02 1972-08-02 Apparatus for determining air flow to a gas burner Expired - Lifetime US3765824A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US27883972A 1972-08-02 1972-08-02

Publications (1)

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US3765824A true US3765824A (en) 1973-10-16

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ID=23066597

Family Applications (1)

Application Number Title Priority Date Filing Date
US00278839A Expired - Lifetime US3765824A (en) 1972-08-02 1972-08-02 Apparatus for determining air flow to a gas burner

Country Status (4)

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US (1) US3765824A (enrdf_load_stackoverflow)
JP (2) JPS4967223A (enrdf_load_stackoverflow)
CA (1) CA976078A (enrdf_load_stackoverflow)
ES (1) ES417780A1 (enrdf_load_stackoverflow)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4050879A (en) * 1974-11-18 1977-09-27 Mitsubishi Jukogyo Kabushiki Kaisha Fuel combustion apparatus
US4770627A (en) * 1985-12-24 1988-09-13 Toyotomi Kogyo Co., Ltd. Combustion control system for oil burner
US5572862A (en) * 1993-07-07 1996-11-12 Mowill Rolf Jan Convectively cooled, single stage, fully premixed fuel/air combustor for gas turbine engine modules
US5765363A (en) * 1993-07-07 1998-06-16 Mowill; R. Jan Convectively cooled, single stage, fully premixed controllable fuel/air combustor with tangential admission
US5924276A (en) * 1996-07-17 1999-07-20 Mowill; R. Jan Premixer with dilution air bypass valve assembly
US6220034B1 (en) 1993-07-07 2001-04-24 R. Jan Mowill Convectively cooled, single stage, fully premixed controllable fuel/air combustor
US6327860B1 (en) * 2000-06-21 2001-12-11 Honeywell International, Inc. Fuel injector for low emissions premixing gas turbine combustor
EP1174662A1 (en) * 2000-07-21 2002-01-23 Mitsubishi Heavy Industries, Ltd. Apparatus to reduce the vibrations of a turbine combustor
US6925809B2 (en) 1999-02-26 2005-08-09 R. Jan Mowill Gas turbine engine fuel/air premixers with variable geometry exit and method for controlling exit velocities
US20070277530A1 (en) * 2006-05-31 2007-12-06 Constantin Alexandru Dinu Inlet flow conditioner for gas turbine engine fuel nozzle

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3897199A (en) * 1974-07-05 1975-07-29 Foster Wheeler Corp Burner assembly having a tertiary air nozzle
JPS6122146U (ja) * 1984-07-10 1986-02-08 日新電機株式会社 電気機器の異常検出装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3486834A (en) * 1968-04-25 1969-12-30 Combustion Eng Gas burning system arrangement
US3700376A (en) * 1970-12-28 1972-10-24 Babcock & Wilcox Ag Oil burner

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4711177U (enrdf_load_stackoverflow) * 1971-02-24 1972-10-09

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3486834A (en) * 1968-04-25 1969-12-30 Combustion Eng Gas burning system arrangement
US3700376A (en) * 1970-12-28 1972-10-24 Babcock & Wilcox Ag Oil burner

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4050879A (en) * 1974-11-18 1977-09-27 Mitsubishi Jukogyo Kabushiki Kaisha Fuel combustion apparatus
US4770627A (en) * 1985-12-24 1988-09-13 Toyotomi Kogyo Co., Ltd. Combustion control system for oil burner
US5572862A (en) * 1993-07-07 1996-11-12 Mowill Rolf Jan Convectively cooled, single stage, fully premixed fuel/air combustor for gas turbine engine modules
US5765363A (en) * 1993-07-07 1998-06-16 Mowill; R. Jan Convectively cooled, single stage, fully premixed controllable fuel/air combustor with tangential admission
US6220034B1 (en) 1993-07-07 2001-04-24 R. Jan Mowill Convectively cooled, single stage, fully premixed controllable fuel/air combustor
US5924276A (en) * 1996-07-17 1999-07-20 Mowill; R. Jan Premixer with dilution air bypass valve assembly
US6925809B2 (en) 1999-02-26 2005-08-09 R. Jan Mowill Gas turbine engine fuel/air premixers with variable geometry exit and method for controlling exit velocities
US6327860B1 (en) * 2000-06-21 2001-12-11 Honeywell International, Inc. Fuel injector for low emissions premixing gas turbine combustor
EP1174662A1 (en) * 2000-07-21 2002-01-23 Mitsubishi Heavy Industries, Ltd. Apparatus to reduce the vibrations of a turbine combustor
US20070277530A1 (en) * 2006-05-31 2007-12-06 Constantin Alexandru Dinu Inlet flow conditioner for gas turbine engine fuel nozzle
EP1865261A3 (en) * 2006-05-31 2014-10-08 General Electric Company Inlet flow conditioner for gas turbine engine fuel nozzle

Also Published As

Publication number Publication date
JPS4967223A (enrdf_load_stackoverflow) 1974-06-29
CA976078A (en) 1975-10-14
JPS542231U (enrdf_load_stackoverflow) 1979-01-09
ES417780A1 (es) 1976-03-01

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