US20100047726A1 - Boiler and pilot system - Google Patents

Boiler and pilot system Download PDF

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Publication number
US20100047726A1
US20100047726A1 US12/543,119 US54311909A US2010047726A1 US 20100047726 A1 US20100047726 A1 US 20100047726A1 US 54311909 A US54311909 A US 54311909A US 2010047726 A1 US2010047726 A1 US 2010047726A1
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US
United States
Prior art keywords
pilot
assembly
air
fuel
burner
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.)
Pending
Application number
US12/543,119
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English (en)
Inventor
John P. CHICOINE
Kenneth W. Cohen
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.)
Mestek Inc
Original Assignee
Mestek Inc
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 Mestek Inc filed Critical Mestek Inc
Priority to US12/543,119 priority Critical patent/US20100047726A1/en
Assigned to MESTEK, INC. reassignment MESTEK, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CHICOINE, JOHN P., COHEN, KENNETH W.
Priority to CA2676467A priority patent/CA2676467C/fr
Publication of US20100047726A1 publication Critical patent/US20100047726A1/en
Assigned to MESTEK, INC. reassignment MESTEK, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FERRANTE, THOMAS
Assigned to SANTANDER BANK, N.A. reassignment SANTANDER BANK, N.A. SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MESTEK, INC.
Assigned to SANTANDER BANK, N.A. reassignment SANTANDER BANK, N.A. SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MESTEK, INC.
Pending legal-status Critical Current

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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
    • F23D14/26—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid with provision for a retention flame
    • 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
    • F23D14/82—Preventing flashback or blowback
    • 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
    • F23D2207/00—Ignition devices associated with burner

Definitions

  • the present invention relates generally to boiler and burner apparatuses and, more particularly, to pilots used in connection with cylindrical premix burners.
  • Burners which combust gas or other fuel are widely known.
  • Gas burners incorporated for example into indirect heating devices, utilize the combustion of a gas or similar fuel (e.g., propane, natural gas, or fuel oil) for heating a work substance, oftentimes a flowable substance such as air or water.
  • a gas or similar fuel e.g., propane, natural gas, or fuel oil
  • heated water may be directed into the interior of a home for general comfort heating purposes or for providing hot water for bathing, laundering, cooking, and the like.
  • natural gas or other fuel is controllably forced through a nozzle or jet portion of the burner, where it is intermixed (most typically) with air from a blower, forming a gas spray or aerosol for enhancing combustion.
  • a pilot is ignited, which in turn is used to ignite the main burner on demand.
  • Known pilot systems incorporate various ignition means, such as a spark electrode, wherein a high-voltage electrode is mounted so that its tip is in close proximity to the grounded pilot.
  • a spark electrode As a blower forces the air/gas mixture through a pilot tube, a spark is applied and the pilot flame ignites. This flame is then used to ignite the main burner.
  • the combustion product (heated air/plasma) is directed into a heat exchanger, where the energy produced by the combustion process is transferred to the work substance to be heated.
  • the combustion exhaust is then moved to an exhaust exit, possibly after one or more recirculation steps or the like to further recapture heat from the combustion product.
  • a cylindrical housing is often employed to cover most or all of the components.
  • flashback i.e. when the flame pops back through the premix burner nozzle and runs upstream through the air/gas mixture. In a worst-case scenario, flashback can result in an explosion.
  • many prior art burners use bleed air from the main burner for the pilot to ensure that positive flow through the pilot is maintained at all times.
  • supplying the pilot with air from the main burner limits flexibility in choosing main burner ignition inputs since pilot pressure requirements control main burner operation during the ignition sequence.
  • pilots used in connection with cylindrical premix burners has been to locate them within the burner or, if located outside the burner, to use air bled from the main blower to supply the pilot.
  • One problem or drawback with locating the pilot within the burner is the “shadow” created by the components of the pilot, which affects the burning pattern on the burner surface. This uneven burning pattern may lead to local hot spots within the burner and reduced burner life.
  • Another disadvantage with locating the pilot within the burner is that servicing the pilot becomes very difficult, as the fuel/air components of the main burner must be removed to access the pilot.
  • FIG. 1 is a schematic view of a boiler and burner assembly, in accordance with one embodiment of the present invention.
  • FIG. 2 illustrates a specific configuration of the schematic representation shown in FIG. 1 , in accordance with one embodiment of the present invention.
  • FIG. 3 illustrates the pilot assembly of FIG. 2 , as ignited.
  • FIG. 4 illustrates component elements of the pilot assembly of FIGS. 2 and 3 .
  • FIG. 5 illustrates a enlarged view of a flame disc of the pilot assembly, in accordance with one embodiment of the present invention.
  • a boiler apparatus includes a housing 1 defining an interior boiler chamber 2 and a burner assembly 4 arranged to be in thermal communication with the boiler chamber 2 .
  • a fuel valve assembly 6 controls a flow of fuel (from an unillustrated supply of the same) to the burner assembly 4
  • a blower assembly 7 directs air through an air valve assembly 9 to the burner assembly 4 .
  • An ignition device 8 is provided for instigating combustion of an inlet gas/air stream, and is arranged adjacent one edge of the burner assembly 4 . This ignition device 8 , commonly known as a “pilot” or “pilot burner” is in turn used to light the main burner.
  • FIG. 1 is a schematic representation of a boiler apparatus and as such, it will be readily appreciated that the constituent elements of the boiler apparatus may be at differing locations within and around the housing 2 , without departing from the broader aspects of the present invention.
  • both the supply of fuel and the supply of air are controlled, and isolated, from the burner assembly 4 via the integrated fuel valve and air valve assemblies, 6 and 9 respectively.
  • the integrated fuel valve and air valve assemblies, 6 and 9 isolate the ignited fuel/air mixture from ‘blowing back’ into either the air supply or the fuel supply, thus significantly increasing the safety and operability of the present invention.
  • FIG. 2 illustrates a specific configuration of the schematic representation shown in FIG. 1 , in accordance with one embodiment of the present invention.
  • a pilot assembly P of the present invention comprises a mixing tube section 30 where a supply of fuel and air are initially mixed.
  • a pilot block 32 is generally shown in FIG. 2 and itself includes a pilot tube 20 and an ignition means 26 , to be described in more detail later.
  • air is provided to the mixing tube 30 via a dedicated pilot fan 10 , and is directed through an air funnel 12 and thereafter through an air valve 13 .
  • the air funnel 12 meters the correct amount of air through an internal orifice.
  • the air valve 13 may be one of many types known in the art, such as a solenoid valve, although the present invention is not limited in this regard.
  • a dedicated pilot fan 10 is utilized to supply air to the mixing tube 30 of the pilot assembly P, as opposed to known apparatuses which utilize a single blower for supplying air to the burner assembly 4 , as well as directing ‘bleed air’ to the pilot assembly P.
  • pilot fan 10 may be designed to the precise requirements (pressure, and the like) of the pilot assembly P and may be controlled to a more precise degree.
  • pilot fan 10 enables the pilot fan 10 to be wholly located outside of the boiler chamber 2 and the burner assembly 4 , thus making repairs of the pilot assembly P more easily accomplished. Likewise, repair or replacement of the burner assembly 4 may also be effectuated without disrupting the pilot assembly P.
  • pilot fan 10 may be switched off even while the blower for the burner assembly 4 remains active, saving both power as well as increasing the operational life of the pilot fan 10 .
  • air from the pilot fan 10 is passed through the air valve assembly 13 (or, 9 in FIG. 1 ), and mixes with fuel in the mixing tube 30 .
  • the fuel itself is also passed through a fuel valve assembly 15 (or, 6 in FIG. 1 ) prior to entering the mixing tube 30 , via an inlet port 18 .
  • both the supply of air, as well as the supply of fuel are isolated from the pilot fan 10 and fuel source 19 via the integrated air valve assembly and fuel valve assembly, 13 and 15 respectively. In this manner, any possibility of ‘blow back’ of the ignited mixture of air/fuel within the mixing tube 30 is eliminated, and the overall safety of the pilot assembly P is greatly increased.
  • the pilot block 32 comprises a pilot tube 20 and an operationally integrated ignition means ( 22 , 26 and 28 , as described below).
  • the mixing tube 30 is connected to the pilot tube 20 , which receives the air gas mixture and directs the flow of the air/gas mixture out the end of the pilot tube 20 , where an adjacent ignition source 22 ignites the mixture, thus producing a flame 40 , as best shown in FIG. 3 .
  • the mixing tube 30 may be made of any suitable material known in the art such as steel, aluminum, etc, without departing from the broader aspects of the present invention.
  • Aluminum is preferably utilized because this will allow the present invention to have two compression fittings for easy disassembly.
  • a pressure switch and tube assembly 27 is utilized to operationally connect the supply of fuel with the active supply of air from the pilot fan 10 .
  • the pressure switch and tube assembly 27 will coordinate the activation of the fuel valve assembly 15 with the activation of the pilot fan 10 .
  • the pressure switch and tube assembly 27 upon sensing air flow from the pilot fan 10 , the pressure switch and tube assembly 27 will send a signal to the fuel valve assembly 15 to open, which will allow gas/fuel to pass through the gas orifice 18 and into the mixing tube 30 .
  • a further important aspect of the present invention lies in the use of a pilot tube retaining collar 14 , as best seen in FIGS. 2 , 4 and 5 .
  • the pilot tube retaining collar 14 is provided at the end of the pilot tube 20 and includes an integrated pilot flame disc 16 .
  • the pilot flame disc 16 is a substantially flat disc containing numerous holes 24 through which the air/gas mixture from the mixing tube 30 passes.
  • pilot tube retaining collar 14 and integrated pilot flame disc 16 are yet another important aspect of the present invention.
  • the holes 24 of the flame disc 16 adds additional turbulence to the air/gas mixture as it passes out the end of the pilot tube 20 .
  • the flame disc 16 itself provides a backstop to the more-perfectly mixed and ignited air/fuel mixture, thus assisting the direction of the flame 40 into the burner assembly 4 .
  • the ignition means includes a solid state igniter 26 connected to a spark electrode 28 , although other ignition means known in the art may be alternatively utilized without departing from the broader aspects of the present invention.
  • a solid state igniter 26 with a minimum output voltage of 9,000 volts is connected to the spark electrode 28 .
  • An electrode tip 22 (best seen in FIG. 2 ) extends from the electrode 28 to an inner periphery of the pilot tube retaining collar 14 .
  • a voltage from the solid state igniter 26 is applied to the electrode 28 which causes as spark to arc from the electrode tip 22 to an inner periphery of the pilot tube retaining collar 14 .
  • the spacing of the electrode tip 22 is 1 ⁇ 8 inch from an inner periphery of the pilot tube retaining collar 14 .
  • the maximum spacing is 1 ⁇ 4 inch from an inner periphery of the pilot tube retaining collar 14 .
  • the flame 40 Upon ignition, the flame 40 burns in a torch-like fashion with approximately a 6,000 BTU input.
  • the pilot assembly P may then be operated at minimum gas pressures under two inches and maximum pressures of over five inches.
  • the fuel valve assembly 15 has a full adjustment within these parameters and the pilot is easily set in the field by one simple gas pressure adjustment, preferably set at about three inches water column.
  • the flame 40 of the pilot burner is extremely tolerant to maladjustment, and will ignite at full input (about 4,000,000 BTUs) without igniting low fire first (although such a scenario is not preferred).
  • pilot gas and air flow are isolated from the combustion chamber, and their respective sources, via integrated valves 13 and 15 following main burner ignition.
  • increased combustion chamber pressure due to variations in boiler input or downstream conditions cannot create reverse flow, i.e. flashback, of combustion chamber gases through the pilot assembly P.
  • the fact that the pilot gas and air flow are isolated from the combustion chamber via valves also allows the pilot fan 10 to be turned off during burner operation, increasing pilot fan life.
  • a further advantage of the independent pilot is that the main blower can be lit at optimum conditions for reduced noise and ignition losses.
  • pilot burner orifice is specifically designed with an aperture of sufficient size to allow direct viewing of the pilot flame, ignition spark, and main burner. Sight glass may be positioned directly on top of the pilot tube to allow for direct viewing of the main flame and pilot flame. This provides significant aid in troubleshooting pilot ignition issues.
  • the pilot burner orifice is also designed to optimize fuel flow past the spark igniter to enhance ignition over a wide range of pilot conditions, improving robustness of pilot ignition.
  • An infra-red flame detector may also be positioned to detect the pilot as well as main flame.
  • pilot assembly P may be mounted in a single housing, outside of the boiler and main burner housing, the pilot assembly P may be easily removed for service without disturbing other system components.

Landscapes

  • 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)
  • Air Supply (AREA)
US12/543,119 2008-08-20 2009-08-18 Boiler and pilot system Pending US20100047726A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US12/543,119 US20100047726A1 (en) 2008-08-20 2009-08-18 Boiler and pilot system
CA2676467A CA2676467C (fr) 2008-08-20 2009-08-20 Systeme de chaudiere-pilote

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US9030208P 2008-08-20 2008-08-20
US12/543,119 US20100047726A1 (en) 2008-08-20 2009-08-18 Boiler and pilot system

Publications (1)

Publication Number Publication Date
US20100047726A1 true US20100047726A1 (en) 2010-02-25

Family

ID=41279493

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/543,119 Pending US20100047726A1 (en) 2008-08-20 2009-08-18 Boiler and pilot system

Country Status (3)

Country Link
US (1) US20100047726A1 (fr)
EP (2) EP2674674A3 (fr)
CA (1) CA2676467C (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012058587A2 (fr) * 2010-10-28 2012-05-03 Flare Industries, Inc. Ensemble d'allumage à surface chaude destiné à être utilisé dans des veilleuses pour le torchage, l'incinération et des brûleurs de process industriel
US20180119989A1 (en) * 2016-10-27 2018-05-03 Noritz Corporation Hot water apparatus
WO2018189705A1 (fr) 2017-04-13 2018-10-18 Cadila Healthcare Limited Vaccin pcsk9 à base de nouveaux peptides

Citations (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US974040A (en) * 1910-06-04 1910-10-25 William Donley Gas-burner.
US2073448A (en) * 1933-03-09 1937-03-09 Western Electric Co Burner
US2484272A (en) * 1947-08-05 1949-10-11 Crowe John Marshall Fluid burner with auxiliary external oxygen supply
GB819256A (en) * 1955-11-09 1959-09-02 Orr & Sembower Inc Pilot ignition unit for fuel burners
US2905236A (en) * 1959-09-22 Pilot burner and igniter
US2966943A (en) * 1957-02-11 1961-01-03 Controls Co Of America Electric ignition assembly for liquid fuel burners
US3073121A (en) * 1958-02-06 1963-01-15 Bendix Corp Igniter
US3109481A (en) * 1960-02-19 1963-11-05 Standard Oil Co Burner igniter system
US3236284A (en) * 1963-01-02 1966-02-22 Joseph W Kemper Monitoring system for a combustion apparatus and the like
US3265114A (en) * 1964-07-20 1966-08-09 Gen Dynamics Corp Ignitor-burner assembly
US3304988A (en) * 1965-10-06 1967-02-21 Babcock & Wilcox Co Ignitor
US3359436A (en) * 1963-02-02 1967-12-19 Siemens Ag Seeding device for a magnetohydrodynamic generator
US3645511A (en) * 1970-03-18 1972-02-29 Afe Ind Inc Pilot for gas burner
US3651791A (en) * 1969-08-07 1972-03-28 Nippon Denso Co System for controlling fuel supply to an internal combustion engine
US3856457A (en) * 1972-12-29 1974-12-24 Air Prod & Chem Burner of the oxy-fuel type
US3893810A (en) * 1972-12-18 1975-07-08 La Clede Lientz Flare stack burner for odor and pollutant elimination
US3911675A (en) * 1974-03-25 1975-10-14 Gen Motors Corp Keep-hot catalytic converter
US4059386A (en) * 1976-01-21 1977-11-22 A. O. Smith Corporation Combustion heating apparatus to improve operation of gas pilot burners
US4128388A (en) * 1977-05-12 1978-12-05 Challenge-Cook Bros., Inc. Geyseric burner assembly and method for combusting fuels
US4192642A (en) * 1978-04-17 1980-03-11 Selas Corporation Of America Universal pilot assembly
US4597733A (en) * 1985-02-14 1986-07-01 Alvin Dean Gas heating system for dehydrators and the like
US4645450A (en) * 1984-08-29 1987-02-24 Control Techtronics, Inc. System and process for controlling the flow of air and fuel to a burner
US4685425A (en) * 1985-02-14 1987-08-11 A. O. Smith Corporation Submersible chamber water heater
US4878424A (en) * 1988-11-07 1989-11-07 Specialty Equipment Companies, Inc. Cooking apparatus
US4925093A (en) * 1988-11-09 1990-05-15 Mor-Flo Industries, Inc. Forced draft direct vent system for a water heater
US4924816A (en) * 1989-05-01 1990-05-15 Mor-Flo Industries, Inc. Water heater with flame spill-out prevention arrangement
US4938203A (en) * 1989-03-08 1990-07-03 Gas Research Institute Pulse combustion apparatus
US5022850A (en) * 1990-03-23 1991-06-11 Atlantic Richfield Company Pilot flame apparatus
US5073104A (en) * 1985-09-02 1991-12-17 The Broken Hill Proprietary Company Limited Flame detection
US5302111A (en) * 1991-07-23 1994-04-12 Frair Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Process and apparatus for pulsed combustion
US5347981A (en) * 1993-09-07 1994-09-20 Goodman Manufacturing Company, L.P. Pilot pressure switch and method for controlling the operation of a furnace
US5397232A (en) * 1992-11-10 1995-03-14 Nishimura; Makoto Metal-brazing pulse burner
US5721385A (en) * 1996-09-13 1998-02-24 Robinson Willey Limited Testing device for gas pilot light
US6461148B1 (en) * 2000-09-28 2002-10-08 Mcdermott Technology, Inc. Compact, high-temperature, low-flow rate, liquid fuel-fired burner
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
US7387089B2 (en) * 2004-09-03 2008-06-17 Rheem Manufacturing Company Water heater with cross-sectionally elongated raw fuel jet pilot orifice
US20080251035A1 (en) * 2007-04-12 2008-10-16 Rheem Manufacturing Company Burner Flashback Detection and System Shutdown Apparatus
US20100043775A1 (en) * 2008-08-21 2010-02-25 John Phillips Artificial log set assembly
US20100183989A1 (en) * 2009-01-16 2010-07-22 L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Air-Gas Pilot Burner that can Operate with Oxygen
US20110003258A1 (en) * 2008-02-01 2011-01-06 Carlson Brent J Remotely actuated pilot valve, system and method
US20110045423A1 (en) * 2009-08-24 2011-02-24 Honeywell International Inc. Gas pilot burner assembly
US8636503B2 (en) * 2008-07-16 2014-01-28 Honeywell International Inc. Pilot burner

Patent Citations (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2905236A (en) * 1959-09-22 Pilot burner and igniter
US974040A (en) * 1910-06-04 1910-10-25 William Donley Gas-burner.
US2073448A (en) * 1933-03-09 1937-03-09 Western Electric Co Burner
US2484272A (en) * 1947-08-05 1949-10-11 Crowe John Marshall Fluid burner with auxiliary external oxygen supply
GB819256A (en) * 1955-11-09 1959-09-02 Orr & Sembower Inc Pilot ignition unit for fuel burners
US2966943A (en) * 1957-02-11 1961-01-03 Controls Co Of America Electric ignition assembly for liquid fuel burners
US3073121A (en) * 1958-02-06 1963-01-15 Bendix Corp Igniter
US3109481A (en) * 1960-02-19 1963-11-05 Standard Oil Co Burner igniter system
US3236284A (en) * 1963-01-02 1966-02-22 Joseph W Kemper Monitoring system for a combustion apparatus and the like
US3359436A (en) * 1963-02-02 1967-12-19 Siemens Ag Seeding device for a magnetohydrodynamic generator
US3265114A (en) * 1964-07-20 1966-08-09 Gen Dynamics Corp Ignitor-burner assembly
US3304988A (en) * 1965-10-06 1967-02-21 Babcock & Wilcox Co Ignitor
US3651791A (en) * 1969-08-07 1972-03-28 Nippon Denso Co System for controlling fuel supply to an internal combustion engine
US3645511A (en) * 1970-03-18 1972-02-29 Afe Ind Inc Pilot for gas burner
US3893810A (en) * 1972-12-18 1975-07-08 La Clede Lientz Flare stack burner for odor and pollutant elimination
US3856457A (en) * 1972-12-29 1974-12-24 Air Prod & Chem Burner of the oxy-fuel type
US3911675A (en) * 1974-03-25 1975-10-14 Gen Motors Corp Keep-hot catalytic converter
US4059386A (en) * 1976-01-21 1977-11-22 A. O. Smith Corporation Combustion heating apparatus to improve operation of gas pilot burners
US4128388A (en) * 1977-05-12 1978-12-05 Challenge-Cook Bros., Inc. Geyseric burner assembly and method for combusting fuels
US4192642A (en) * 1978-04-17 1980-03-11 Selas Corporation Of America Universal pilot assembly
US4645450A (en) * 1984-08-29 1987-02-24 Control Techtronics, Inc. System and process for controlling the flow of air and fuel to a burner
US4597733A (en) * 1985-02-14 1986-07-01 Alvin Dean Gas heating system for dehydrators and the like
US4685425A (en) * 1985-02-14 1987-08-11 A. O. Smith Corporation Submersible chamber water heater
US5073104A (en) * 1985-09-02 1991-12-17 The Broken Hill Proprietary Company Limited Flame detection
US4878424A (en) * 1988-11-07 1989-11-07 Specialty Equipment Companies, Inc. Cooking apparatus
US4925093A (en) * 1988-11-09 1990-05-15 Mor-Flo Industries, Inc. Forced draft direct vent system for a water heater
US4938203A (en) * 1989-03-08 1990-07-03 Gas Research Institute Pulse combustion apparatus
US4924816A (en) * 1989-05-01 1990-05-15 Mor-Flo Industries, Inc. Water heater with flame spill-out prevention arrangement
US5022850A (en) * 1990-03-23 1991-06-11 Atlantic Richfield Company Pilot flame apparatus
US5302111A (en) * 1991-07-23 1994-04-12 Frair Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Process and apparatus for pulsed combustion
US5397232A (en) * 1992-11-10 1995-03-14 Nishimura; Makoto Metal-brazing pulse burner
US5347981A (en) * 1993-09-07 1994-09-20 Goodman Manufacturing Company, L.P. Pilot pressure switch and method for controlling the operation of a furnace
US5721385A (en) * 1996-09-13 1998-02-24 Robinson Willey Limited Testing device for gas pilot light
US6461148B1 (en) * 2000-09-28 2002-10-08 Mcdermott Technology, Inc. Compact, high-temperature, low-flow rate, liquid fuel-fired burner
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
US7387089B2 (en) * 2004-09-03 2008-06-17 Rheem Manufacturing Company Water heater with cross-sectionally elongated raw fuel jet pilot orifice
US20080251035A1 (en) * 2007-04-12 2008-10-16 Rheem Manufacturing Company Burner Flashback Detection and System Shutdown Apparatus
US20110003258A1 (en) * 2008-02-01 2011-01-06 Carlson Brent J Remotely actuated pilot valve, system and method
US8636503B2 (en) * 2008-07-16 2014-01-28 Honeywell International Inc. Pilot burner
US20100043775A1 (en) * 2008-08-21 2010-02-25 John Phillips Artificial log set assembly
US20100183989A1 (en) * 2009-01-16 2010-07-22 L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Air-Gas Pilot Burner that can Operate with Oxygen
US20110045423A1 (en) * 2009-08-24 2011-02-24 Honeywell International Inc. Gas pilot burner assembly

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012058587A2 (fr) * 2010-10-28 2012-05-03 Flare Industries, Inc. Ensemble d'allumage à surface chaude destiné à être utilisé dans des veilleuses pour le torchage, l'incinération et des brûleurs de process industriel
WO2012058587A3 (fr) * 2010-10-28 2012-07-05 Flare Industries, Inc. Ensemble d'allumage à surface chaude destiné à être utilisé dans des veilleuses pour le torchage, l'incinération et des brûleurs de process industriel
US20180119989A1 (en) * 2016-10-27 2018-05-03 Noritz Corporation Hot water apparatus
WO2018189705A1 (fr) 2017-04-13 2018-10-18 Cadila Healthcare Limited Vaccin pcsk9 à base de nouveaux peptides

Also Published As

Publication number Publication date
CA2676467C (fr) 2012-09-25
EP2157372B1 (fr) 2014-10-08
EP2157372A2 (fr) 2010-02-24
EP2674674A2 (fr) 2013-12-18
CA2676467A1 (fr) 2010-02-20
EP2674674A3 (fr) 2014-08-27
EP2157372A3 (fr) 2011-03-02

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