WO2006086714B1 - Low nox pilot burner and associated method of use - Google Patents

Low nox pilot burner and associated method of use

Info

Publication number
WO2006086714B1
WO2006086714B1 PCT/US2006/004893 US2006004893W WO2006086714B1 WO 2006086714 B1 WO2006086714 B1 WO 2006086714B1 US 2006004893 W US2006004893 W US 2006004893W WO 2006086714 B1 WO2006086714 B1 WO 2006086714B1
Authority
WO
WIPO (PCT)
Prior art keywords
pilot burner
assembly
burner
providing
pilot
Prior art date
Application number
PCT/US2006/004893
Other languages
French (fr)
Other versions
WO2006086714A1 (en
Inventor
Frederick Dean Lyles
Original Assignee
Robertshaw Controls Co
Frederick Dean Lyles
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 Robertshaw Controls Co, Frederick Dean Lyles filed Critical Robertshaw Controls Co
Priority to MX2007009720A priority Critical patent/MX2007009720A/en
Priority to EP06720654A priority patent/EP1853851A1/en
Publication of WO2006086714A1 publication Critical patent/WO2006086714A1/en
Publication of WO2006086714B1 publication Critical patent/WO2006086714B1/en

Links

Classifications

    • 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
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
    • F23D14/725—Protection against flame failure by using flame detection devices
    • 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
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/84—Flame spreading or otherwise shaping
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/10—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using thermocouples
    • F23N5/107—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using thermocouples using mechanical means, e.g. safety valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements
    • F23N5/245—Preventing development of abnormal or undesired conditions, i.e. safety arrangements using electrical or electromechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23Q—IGNITION; EXTINGUISHING-DEVICES
    • F23Q9/00—Pilot flame igniters
    • F23Q9/02—Pilot flame igniters without interlock with main fuel supply
    • F23Q9/04—Pilot flame igniters without interlock with main fuel supply for upright burners, e.g. gas-cooker burners
    • 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
    • F23D2900/00015—Pilot burners specially adapted for low load or transient conditions, e.g. for increasing stability

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Combustion (AREA)

Abstract

The pilot burner assembly and associated method of use is disclosed. This includes a pilot burner having a top portion, a middle portion and a bottom portion, wherein the top portion of the pilot burner includes a hood that is positioned adjacent to an igniter and a thermocouple. The middle portion of the pilot burner includes at least one opening providing an air inlet. During situations where LDO (lint-dust-oil) build-up has occurred, the hood will continue to provide flame to a main burner, but the flame to heat the thermocouple will shrink or lift to the point where it no longer can heat the thermocouple sufficiently to generate enough power to allow for a safety magnet valve to remain energized. This will result in the shutting-off of the associated gas-fired device.

Claims

AMENDED CLAIMS received by the International Bureau on 09 August 2006 (09.08.06)
What is claimed is:
I > A low NOx emission burner assembly (10) for selectively providing a pilot burner flame, the low NOx emission burner assembly (10) comprising: at least one pilot burner hood (12) for directing the pilot burner flame; at least one pilot burner fuel inlet (248) for the introduction into the pilot burner assembly (10) of a flammable fiiel; at least one pilot burner air inlet (U 2) for the introduction into the pilot burner assembly (10) of air to support the combustion of the flammable fuel to produce the pilot burner flame; and a thermocouple assembly (20) for controlling a flow of the flammable fuel to a main burner (2), the thermocouple assembly (20) being positioned adjacent to one or more of the at least one pilot burner hoods (12) such that during ordinary operation, the thermocouple assembly (20) is activated by the pilot burner flame to allow fuel flow to the main burner (2), and when the at least one pilot burner air inlet (112) is at least partially blocked such that the pilot burner flame shifts it position while continuing to bum, the change in the pilot burner flame causes the thermocouple assembly (20) to disallow fuel to flow to the main burner (2).
2. The low NOx emission burner assembly (10) of claim 1 wherein the at least one pilot burner hood (12) comprises a plurality of pilot burner hoods (12).
3. The low NOx emission burner assembly (10) of claim 2 wherein the plurality of pilot burner hoods (12) comprises two pilot burner hoods (12).
4. The low NOx emission burner assembly (10) of claim 1 wherein the at least one pilot burner air inlet (112) comprises a plurality of pilot burner air inlets (112).
5. The low NOx emission burner assembly (10) of claim 4 wherein the plurality of pilot burner air inlets (112) comprises four pilot burner air inlets (112).
6. The low NOx emission burner assembly ( 10) of claim 1 farther comprising: an igniter assembly (300) for igniting the flammable fuel, the igniter assembly (300) being positioned adjacent to the at least one pilot burner hood (12). 11
7. A method of reducing NOx emissions from a burner assembly (10), the method comprising: providing a pilot burner hood (12) for directing a pilot burner flame; providing a pilot burner fuel inlet (248) for the introduction into the pilot burner hood (12) of a flammable fuel; providing a pilot burner air inlet (112) for the introduction into the pilot burner hood (12) of air to support the combustion of the flammable fuel to produce the pilot burner flame; providing a main burner assembly (2) operable to act as a heat source via burning of the flammable fuel; and providing a thermocouple assembly (20) for controlling a flow of the flammable fuel to the main burner assembly (2), including positioning the thermocouple assembly (20) adjacent to the pilot burner hood (12) such that during ordinary operation, the thermocouple assembly (20) is heated by the pilot burner flame to allow fuel flow to the main burner assembly (2), and such that when the at least one pilot burner air inlet (112) is at least partially blocked such that the pilot burner flame shifts it position while continuing to burn, the change in the pilot burner flame causes the thermocouple assembly (20) to disallow fuel to flow to the main burner assembly (2),
8. The method of claim 7 wherein the step of providing a pilot burner hood (12) comprises providing a plurality of pilot burner hoods (12).
9. The method of claim 8 wherein the step of providing a pilot burner hood (12) comprises providing two pilot burner hoods (12).
10. The method of claim 7 wherein the step of providing a pilot burner air inlet (112) comprises providing a plurality of pilot burner air inlets (112),
11. The method of claim 10 wherein the step of providing a pilot burner air inlet (112) comprises providing four pilot burner air inlets (112).
12. The method of claim 7 further comprising: providing an igniter assembly (300) for igniting the flammable fuel, the igniter assembly (300) being positioned adjacent to the pilot burner hood (12).
PCT/US2006/004893 2005-02-11 2006-02-10 Low nox pilot burner and associated method of use WO2006086714A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
MX2007009720A MX2007009720A (en) 2005-02-11 2006-02-10 Low nox pilot burner and associated method of use.
EP06720654A EP1853851A1 (en) 2005-02-11 2006-02-10 Low nox pilot burner and associated method of use

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US59377605P 2005-02-11 2005-02-11
US60/593,776 2005-02-11

Publications (2)

Publication Number Publication Date
WO2006086714A1 WO2006086714A1 (en) 2006-08-17
WO2006086714B1 true WO2006086714B1 (en) 2006-12-28

Family

ID=36510721

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2006/004893 WO2006086714A1 (en) 2005-02-11 2006-02-10 Low nox pilot burner and associated method of use

Country Status (4)

Country Link
US (1) US20060199124A1 (en)
EP (1) EP1853851A1 (en)
MX (1) MX2007009720A (en)
WO (1) WO2006086714A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7261061B2 (en) * 2004-12-03 2007-08-28 American Water Heater Company Water heater with lint collection detection
US9416960B2 (en) * 2012-04-30 2016-08-16 Bevolo Gas & Electric Lights, Inc. Lighting apparatus
ITPD20120211A1 (en) * 2012-06-29 2013-12-30 A R C S R L PILOT FLAME IGNITION DEVICE, PARTICULARLY FOR GAS BURNERS
US10151484B2 (en) 2014-04-30 2018-12-11 Emerson Electric Co. Pilot burner assembly and method of assembling same

Family Cites Families (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3178140A (en) * 1963-07-29 1965-04-13 Heathath Mfg Company Inc Means for mounting pilot burners in relation to main burners
US3297074A (en) * 1965-09-09 1967-01-10 Essco Supply Co Pilot light burner
JPS5218875B2 (en) * 1972-06-21 1977-05-24
US3816060A (en) * 1973-04-23 1974-06-11 Intertherm Safety pilot enclosure having flame-diverting air inlet
US3992137A (en) * 1975-02-21 1976-11-16 A. O. Smith Corporation Gas burner
US4177034A (en) * 1977-12-29 1979-12-04 Robertshaw Controls Company Retrofit igniter
US4327290A (en) * 1979-11-02 1982-04-27 Schlumberger Technology Corp. Method and apparatus for nuclear well logging with optimized timing for simultaneous measurement of thermal neutron decay time and gamma ray pulse height spectra
US4337029A (en) * 1980-03-28 1982-06-29 Emerson Electric Co. Pilot burner assembly
IT1232624B (en) * 1989-02-13 1992-02-28 Op Srl FREE FLAME ATMOSPHERE ANALYZER AND BOILER INCLUDING SAID ANALYZER.
US5039300A (en) * 1990-03-12 1991-08-13 Robertshaw Controls Company Pilot burner construction and method of making the same
USD374717S (en) * 1995-05-18 1996-10-15 Sibley Industries, Inc. Horizontal pilot assembly
US5913675A (en) * 1997-06-09 1999-06-22 State Industries, Inc. Low NOx gas burner
US6302062B2 (en) * 1998-08-21 2001-10-16 Srp 687 Pty Ltd. Sealed access assembly for water heaters
DE19851958C2 (en) * 1998-11-11 2000-09-07 Heatec Thermotechnik Gmbh Pilot burner for gas appliances
US6027335A (en) * 1999-02-03 2000-02-22 Griffioen; Robert Howard Pilot assembly
US6561138B2 (en) * 2000-04-17 2003-05-13 Paloma Industries, Limited Water heater with a flame arrester
US6893253B2 (en) * 2001-03-08 2005-05-17 The Water Heater Industry Joint Research And Development Consortium Fuel-fired heating appliance with temperature-based fuel shutoff system
US6715451B2 (en) * 2001-03-08 2004-04-06 The Water Heater Industry Joint Research And Development Consortium Fuel-fired heating appliance with combustion air shutoff system having frangible temperature sensing structure
US6717044B2 (en) * 2001-04-18 2004-04-06 Kraus, Ii George William Thermopile construction with multiple EMF outputs
JP4511760B2 (en) * 2001-04-20 2010-07-28 パロマ工業株式会社 Combustion equipment with flame shield
US20020160326A1 (en) * 2001-04-26 2002-10-31 David Deng Gas pilot system and method having improved oxygen level detection capability and gas fueled device including the same
FR2829564A1 (en) * 2001-09-10 2003-03-14 Sourdillon Sa GAS APPLIANCE WITH LOWER PART BURNER, EQUIPPED WITH SAFETY MEANS, AND WATER HEATER USING THE SAME
US7028642B2 (en) * 2004-09-03 2006-04-18 Rheem Manufacturing Company Water heater having raw fuel jet pilot and associated burner clogging detection apparatus
US7261061B2 (en) * 2004-12-03 2007-08-28 American Water Heater Company Water heater with lint collection detection

Also Published As

Publication number Publication date
WO2006086714A1 (en) 2006-08-17
US20060199124A1 (en) 2006-09-07
MX2007009720A (en) 2007-09-26
EP1853851A1 (en) 2007-11-14

Similar Documents

Publication Publication Date Title
AU2009270341B2 (en) Micro-pilot for gas appliance
WO2009022449A1 (en) Combustor
WO2006086714B1 (en) Low nox pilot burner and associated method of use
CA2364223A1 (en) Flammable vapor resistant water heater with low nox emissions
CN201944845U (en) Gas burner
MX2021006327A (en) Burner for reducing nox emissions and method for operating the burner.
CN2890657Y (en) Heat storage type pulse burning nozzle
JP4144805B2 (en) Combustion device that prevents heating of main burner by pilot flame
JP2016217651A (en) Gas cooking stove
JP2023174146A (en) Gas burner purging method
JP2005016854A (en) Oxygen combustion burner and furnace having the same and its operating method
EP2157372B1 (en) Pilot and burner assembly
JP6497098B2 (en) Ignition control device for pressure spray pot burner
KR100840535B1 (en) Burner Ignition Device of Liquid Fuel and Burner Using That
JP4926915B2 (en) Method and apparatus for preventing backfire of partially premixed burner
JP4148471B2 (en) Waste oil combustion equipment
JP5440897B2 (en) Combustion device
WO2007062019A3 (en) Combustion method and system
JP4176686B2 (en) Combustion device with pilot burner
JP2001182905A (en) Method and apparatus for combusting emulsion fuel of fuel oil and water
KR101536137B1 (en) Industrial Boiler Combustion Assist
CN202501502U (en) Electronic ignition device of combustor
JP2005207668A (en) Gas cooking stove
JP6359849B2 (en) Combustion device with premixed gas burner
KR100711814B1 (en) Igniting and combustion system of oil boiler

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: MX/a/2007/009720

Country of ref document: MX

NENP Non-entry into the national phase

Ref country code: DE

WWE Wipo information: entry into national phase

Ref document number: 2006720654

Country of ref document: EP