WO2009032793A1 - Pilote de brûleur avec rotor virtuel - Google Patents

Pilote de brûleur avec rotor virtuel Download PDF

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Publication number
WO2009032793A1
WO2009032793A1 PCT/US2008/074826 US2008074826W WO2009032793A1 WO 2009032793 A1 WO2009032793 A1 WO 2009032793A1 US 2008074826 W US2008074826 W US 2008074826W WO 2009032793 A1 WO2009032793 A1 WO 2009032793A1
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WO
WIPO (PCT)
Prior art keywords
pilot
nozzle
hood
fuel
furnace
Prior art date
Application number
PCT/US2008/074826
Other languages
English (en)
Inventor
Stephen B. Londerville
Vladimir Lifshits
Pierre Begin
Original Assignee
Coen Company, 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 Coen Company, Inc. filed Critical Coen Company, Inc.
Publication of WO2009032793A1 publication Critical patent/WO2009032793A1/fr

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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2207/00—Ignition devices associated with burner
    • 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
    • F23D2900/00014—Pilot burners specially adapted for ignition of main burners in furnaces or gas turbines

Definitions

  • the present invention relates to warming up large utility-type furnaces, such as are used, for example, to generate steam for major electrical power generating plants, particularly but not limited to coal-fired plants, prior to the start-up of such furnaces to commence their production phase of operation.
  • Such large furnaces can have the size of a large building, and they often employ dozens of spaced-apart burners to provide the needed heat for generating large amounts of electrical power. These furnaces are fired with all types of fuels, including, but not limited to, oil, gas, coal, bio-mass, etc. The furnaces require an initial heat-up to bring their interior to the required operating temperature at which all burners can be fired fully without causing flameouts, generating large amounts of smoke and other pollutants, potentially damaging portions of the furnace due to excessive heat differentials, and the like. [0004] Operators of such furnaces desire that the warm-up period is as short as possible because during warm-up phase, expensive fuel is consumed without generating any power.
  • pilot burners it is not normally feasible to increase the size of the pilot burners to enhance their heat output because pilots are arranged in the relatively small annular passage between the main burner and the surrounding combustion air duct. This limits the size of pilots, for most industrial installations, to no more than about four to five inches in diameter. With such size limitations, the maximum heat output of pilots not using additional air supply is typically limited to around 3 to 7 million BTUs per hour.
  • the high capacity pilots need to be located at the main burner discharge end to generate the flame in the furnace interior and prevent the flame from burning the main burner. At the same time the pilots need to be protected from the main burner flame. In order to meet both these requirements, such installations often require complicated mechanisms to subsequently retract the pilot rearwardly out of the heat and away from fuel particles into the combustion air duct, which are costly, require much maintenance, and are subject to early failures. [0009] Separate warm-up guns not tasked with the main burner ignition were therefore widely employed for warming up furnaces.
  • the present invention improves the manner in which large furnaces, such as are used for commercial power generation, and particularly coal-fired furnaces, are preheated during the initial start-up phase of furnace operation when the interior furnace temperature must be raised sufficiently to commence the production firing of the furnace.
  • a pilot burner hereafter typically "pilot”
  • the pilot of the present invention is operated with combustion air for the main burner and eliminates the need for a separate air supply for the pilot.
  • the pilot flame is ignited and stabilized by injecting a portion of gaseous fuel delivered to the pilot in a spinning pattern that creates intense recirculation and mixing of the discharged pilot fuel with appropriate amounts of air passing through the main burner around the pilot.
  • Such pilots can provide a heat output in the range between about 4 to 50 million BTU per hour, which is much higher than the heat output that could be achieved with prior art pilots operating without the additional air, and assures a rapid heat-up of the furnace and a relative quick start-up of its production phase. Substantial amounts of fuel otherwise used by the pilot without producing useable steam or electricity are thereby saved.
  • the present invention provides both a method and an apparatus for preheating furnaces, particularly large utility-type furnaces that have many burners which often operate with difficult-to-ignite coal during the warm-up phase of furnace operation.
  • a main production burner that includes a first conduit for directing a fuel, for example coal, into an interior of a furnace.
  • An air duct surrounds the coal conduit to define an annular combustion air passage into the furnace where the coal and combustion air are mixed and ignited during the production phase of furnace operation.
  • a pilot nozzle is positioned in the air passage of the main burner so that a downstream end of the nozzle is proximate the downstream end of the burner.
  • the nozzle is surrounded by a tubular hood which has an open downstream end proximate the downstream end of the nozzle and an upstream end. Air flowing through the main burner passage for air is prevented from directly entering the hood by placing a flow inhibitor, such as a plate, over the upstream end of the hood while permitting air to enter the hood via a gap formed between the hood and the plate.
  • a flow inhibitor such as a plate
  • a relatively lesser portion of a pressurized fluid fuel e.g. a gas
  • a pressurized fluid fuel e.g. a gas
  • igniter orifices in the nozzle located inside the tubular hood at a rate commensurate with the amount that can be burned within the limited space inside the tubular hood.
  • the fuel gas jets inside the hood are directed at angles that facilitate entrainment of air through the hood.
  • a major portion of the pilot gas is discharged from main pilot orifices - a plurality of spaced- apart pilot orifices in a downstream end portion of the nozzle immediately adjacent to the hood.
  • the fuel jets from the main pilot orifices are oriented so that the emitted fuel jets angularly diverge in the downstream direction and have a tangential flow component relative to the longitudinal axis of the pilot nozzle. As fuel jets discharging from the main pilot orifices pass in the vicinity of the hood downstream end, they also facilitate the flow of air through the hood.
  • Fuel emitted by the igniter orifices inside the tubular hood is mixed with air passing through the hood and is ignited to generate an igniter flame that propagates past the downstream end of the hood.
  • the igniter flame in turn ignites the mixture of fuel from the main pilot orifices and air passing through the main burner to generate a pilot flame that extends into and heats the furnace interior.
  • Portions of the pilot flame and its constituent gases recirculate from the furnace interior rearwardly towards the nozzle while the flame as a whole spins relative to the nozzle axis to maintain a stable pilot flame.
  • the hood forms a small combustion chamber where a relatively minor amount of the pilot fuel is initially ignited to form the igniter flame which propagates in a downstream direction past the downstream end of the hood, where the major portion of the pilot fuel is discharged via the appropriately positioned and oriented pilot orifices.
  • the hood including the earlier mentioned flow di verier, also effectively shields sensitive components like the spark electrode inside the hood from the heat of the main pilot flame and the furnace, which allows operating the burner without having to retract the pilot into the burner.
  • [0018] In addition, to maintain a pilot flame, it must be stable and remain anchored to the nozzle. High heat output pilots require high fuel velocities through the burner orifices of as much as 500-1500 fUsec. Such high fuel jet velocities lead to undesirable flame instabilities which are significantly reduced or entirely eliminated in accordance with the present invention by imparting a spin to the pilot flame downstream of the nozzle that facilitates establishing a recirculating flow downstream of the nozzle.
  • the axes of the pilot orifices are tangentially offset relative to the pilot axis as described in more detail below.
  • the tangential flow component of the jets provides the spinning results obtained with common prior art burners by placing relatively large spinners around the nozzles that cannot be applied here due to the earlier mentioned space limitations.
  • Another important advantage of the present invention is that the amount of air entering the interior of the hood automatically adjusts itself to the amount of fuel emitted by the igniter orifices inside the hood because as the volume of emitted fuel varies, its speed varies correspondingly, which in turn lowers or raises the fuel pressure inside the hood inversely to the velocity of the fuel emitted from the igniter orifices. With the lowered pressure, more air from the air duct is aspirated into the hood interior so that an approximate stoichiometric balance between the fuel and the air in the hood is maintained. This assures an uninterrupted igniter flame to maintain the main pilot flame even in the event of a temporary flameout.
  • the amount of air drawn into the hood is correspondingly lowered as less fuel is emitted from the igniter orifices of the nozzle and the pressure inside the hood rises correspondingl y .
  • the pilot burner of the present invention is relatively inexpensive because it has no moving parts and needs no internal or external controls.
  • a further advantage attained with the present invention is that the pilot burner is shielded from the high temperature and abrasive/corrosive/contaminating influences of the gases, dust and particles on the furnace interior because the pilot is located inside the air duct, which reduces maintenance costs and prolongs the life of the burner. Still further, since the pilot burner of the present invention requires no external controls, separate air supply lines and the like, it can be made relatively larger in the limited space available in the air ducts of industrial burners. This in turn makes it possible to increase the heat output of the burner and thereby shorten the warm-up period for the furnace, all of which reduces operating costs for the furnace warm-up and pilot burner maintenance. BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 schematically illustrates a large, e.g. utility-type, furnace arrangement for driving a steam turbine as used in large electric power generating plants
  • Fig. 2 is a schematic, cross-sectional view through a burner, including a high heat- output pilot constructed in accordance with the present invention for installation in the furnace shown in Fig. 1 ;
  • Figs. 3 A and 3 B are sectional views of the pilot of the present invention.
  • Fig. 4 is a schematic front elevational view of the main burner and the pilot shown in Fig. 1 ;
  • FIG. 5 schematically illustrates the formation of a pilot flame recirculation zone in accordance with the present invention
  • Fig. 6 is an end view of an air flow restrictor plate of the pilot shown in Figs. 3A and 3B;
  • Fig. 7 is an end view of an air flow straightener that prevents combustion air from flowing directly into a hood surrounding the pilot;
  • Figs. 8A and 8B are end and side elevational views, respectively, of the nozzle of the pilot shown in Figs. 3A and 3B.
  • Fig. 1 schematically illustrates a large power generation installation, as is commonly used, for example, by public utility companies for generating electricity for the public.
  • the installation has at least one large, utility-type furnace 2 and many, typically dozens, of main production burners 4 which extend through at least one wall 6 of the furnace into its interior 8.
  • Such furnaces can be and are fired with all kinds of fuels, with oil, coal and natural gas being the most common.
  • the present invention has particular (but not sole) applicability to firing the furnaces with coal which is typically ground to fine powder or dust.
  • the heat generated by the fuel on the interior of the furnace generates steam 10 that can be used to drive a turbine 12 which may be connected, for example, to an electric generator (not shown).
  • Exhaust gas from the furnace is released to the atmosphere through a stack 14, typically (but in many of the areas of the world not necessarily) after having been appropriately cleaned and/or scrubbed to limit atmospheric pollution.
  • FIG. 2 schematically shows the use of the present invention with a main production burner 4 mounted on and operatively extending through one of the furnace walls 6 and constructed to burn coal, typically finely ground or pulverized coal. It has a coal supply source 18 and a coal supply conduit 20 in which powdered, pulverized or the like coal flows in a downstream direction to a discharge end 22, which may include a spinner or diverter 24 for discharging the coal via an outwardly flared burner throat 26 in furnace wall 6 into the interior 8 of the furnace.
  • Main burner 4 further has a combustion air supply duct 32 which concentrically surrounds coal supply conduit 20 to form an annular combustion air passage 34 between the coal supply conduit and combustion air duct.
  • the main burner may include a supplemental fuel supply tube 28 which runs coaxially through (the horizontal portion of) the main burner and has a fuel discharge end cap 30 that can be used to provide additional heat from firing oil or gas, for example during peak demand periods for electricity when more heat output is needed.
  • Burner installation 4 includes a pilot burner 36 constructed in accordance with the present invention to initiate combustion in the furnace interior and, during a start-up phase of operation of the furnace, to warm up the furnace interior until main burners 16 can be fired after the furnace interior has reached the required temperature for maintaining a stable and complete combustion of the coal (or other fuel).
  • the pilot has a feed tube 38 through which a fluid fuel, such as natural gas for example, is supplied from an appropriate source (not shown) to a pilot nozzle 40.
  • the nozzle is surrounded by a tubular shield or hood 42, the ends of which are open, and an igniter, e.g. an electrical spark igniter 44, is provided for igniting the fuel, as is further described below.
  • Figs. 3A, B and 4 show the pilot burner of the present invention in greater detail.
  • Nozzle 40 includes and is attached to a downstream end of feed tube 38, has a discharge (or downstream) end 50, and has a plurality of pilot fuel discharge orifices 52 from which pilot fuel jets flow.
  • the pilot fuel jets are discharged at an oblique angle relative to the longitudinal axis of the pilot burner, and they are additionally tangential to the axis of the pilot as is further described below.
  • Tubular hood 42 has open upstream and downstream ends 66, 68, respectively.
  • a flow straightener and conditioner 70 (shown also in Fig. 7) is positioned inside the upstream end of the hood and extends some distance into the hood.
  • the flow straightener includes a plurality of ribs 80 placed between the hood 42 and the fuel feed pipe 38 parallel to the igniter burner axis 96.
  • the ribs define multiple flow straightening passages 82 that extend in an axial direction of the pilot. Air flowing between the ribs 80 becomes better oriented in the axial direction of the pilot, a feature which is particularly useful in instances when air flowing through the passage 34 is at an oblique angle relative to the pilot axis.
  • Pilot 36 is further fitted with a damper plate 84 (also shown in Fig. 6) which is spaced apart from the upstream end 66 of hood 42.
  • the damper includes a tubular hub 86 that surrounds pilot fuel feed tube 38 and is slidably movable therealong.
  • Opposite hub 86 is a U-shaped cutout 88 through which igniter support pipe 76 extends.
  • damper plate 84 The axial position of damper plate 84 relative to the upstream end of the hood can be adjusted by moving the plate along fuel supply tube 38 of the pilot burner to vary the width of a gap 90 between the upstream end of the hood and the damper plate to accommodate specific characteristics of the fuel and provide a range of air flows through the burner 32.
  • igniter support pipe 76 ends at a bluff body 92 (Figs. 3 A, B) attached to the inside of the tubular hood 42.
  • An electronic igniter 94 is placed inside the support tube 76 end about flush with the bluff body 92.
  • the bluff body 92 is shaped with a slope 93 that eliminates stagnation areas to the flow upstream of the igniter 94.
  • Suitable hardware and wiring (not shown) for the electronic igniter extends through the igniter pipe 76 to an igniter control (not shown).
  • pilot nozzle 40 is configured as a cap attached to the downstream end of fuel feed tube 38 and has a multiplicity of fuel discharge orifices 52 arranged in a plurality of, e.g. two, rows 52A, 52B that are spaced apart in the axial direction of the nozzle, as illustrated in Fig. 3B.
  • Each orifice diverges in a downstream direction relative to the pilot burner axis 96 by an angle ⁇ (shown in Fig. 8B) in a range between about 20° to 80°, preferably in a range between about 35° to 75° and in the presently preferred embodiment at an angle of about 60°.
  • each orifice 52 is arranged so that its center line 98 is offset relative to a radius line 100 with its origin at the center 96 of the nozzle so that each orifice is also tangential relative to this center, as is illustrated in Fig. 8A.
  • This causes the fuel flow and flame in the wake of the nozzle 50 to spin in a manner analogous to a conventional spinner and anchors the flame to the pilot in spite of the high velocity fuel jets emitted from the orifices.
  • the pilot nozzle 40 additionally includes relatively small-diameter center holes 102. In use, gas flows through the center holes which cools the nozzle center.
  • pilot nozzle 40 and igniter 44 are offset relative to the axis of tubular hood 42 so that the pilot nozzle is adjacent one side of hood 42, to thereby define an enlarged space 104 between the periphery of the pilot nozzle and the opposite wall of the hood where an initial igniter flame is generated, as is further described below.
  • Arrows 106 in Fig. 4 illustrate the tangential positioning and orientation of fuel jets 53 (shown in Fig. 5).
  • pilot 36 for starting up a cool furnace, combustion air flows through annular passage 34 of burner 32 in a downstream direction past tubular hood 42 and then into the furnace interior 8.
  • the gas for the pilot is flowed through feed tube 38 to orifices 46 and pilot nozzle 40.
  • Sizing of the orifices 46 is such that a relatively minor portion of the fuel exits through igniter orifices 46 in the feed tube 38 which are oriented to direct resulting fuel jets into the enlarged space 104 inside the hood and in the vicinity of igniter 44.
  • air from annular passage 34 of the main burner enters the interior of hood 42 via gap 90 between the upstream end of the hood and damper plate 84.
  • Flow straightener 70 straightens out the incoming air so that it flows generally in the direction of the pilot axis and becomes mixed with fuel from igniter orifices 46.
  • the resulting mixture is ignited by spark igniter 94 to form an igniter flame 47 in the enlarged space 104 which propagates in a downstream direction past downstream end 68 of the hood, as is illustrated in Fig. 5.
  • the bulk of the fuel for preheating the furnace is ejected through orifices 52 in nozzle 40 as gas jets 53 which diverge outwardly in the downstream direction so that the ejected fuel becomes mixed with combustion air that flows through the annular passage 34 of the main burner.
  • This mixture is ignited by the igniter flame 47 exiting from the downstream end of the hood which maintains the main pilot flame 54.
  • the amount of combustion air typically flowing through the annular passage 34 depends on the operational needs of the regime and is substantially independent of the pilot burner operation.
  • the rate at which fuel is needed for the pilot also may be changed for operational reasons.
  • the amount of air fed to the burner must reflect the amount of fuel ejected by the igniter orifices to maintain an overall flammable mixture inside the hood 42 on the downstream part of bluff body 92.
  • damper plate 84 blocks combustion air flowing through annular passage 34 directly into the hood. Instead, combustion air must first flow from the annular passage in a radial direction (relative to hood 42) through gap 90 and is then redirected past flow straightener 70 into the interior of the hood, thus minimizing the effects of air flow velocity through the passage 34 onto the amount of air flow entering the hood 42.
  • damper plate 84 The axial position of damper plate 84 relative to the upstream hood end can be adjusted by moving the plate, including its flange 86, along feed tube 38 to set the proper width for gap 90 to permit a sufficient air flow into the hood while preventing variations in the combustion air flow in the annular passage from materially affecting the air flow rate through the hood.
  • the position of the damper plate is not normally changed.
  • the air intake via gap 90 into the hood is nevertheless automatically varied as a function of the gas flow rate through igniter orifices 46 because as the gas velocity through the igniter orifices increases or decreases, the pressure inside the hood changes inversely to the pressure changes.
  • An increase in the gas velocity through the igniter orifices lowers the pressure in the hood, which causes an increase in the air flow rate through gap 90 into the hood and vice versa. This air flow variation occurs automatically and requires no controls of any type.
  • the pilot burner of the present invention is self-regulating and maintains the igniter and pilot flames 47, 54 regardless of changes in the combustion air flow rate while stabilizing the pilot flame 54 and anchoring it to the end of the pilot burner. This assures a continuing, uninterrupted, self-regulating operation of the pilot burner to fully heat up the furnace as quickly as possible.
  • Fig. 5 schematically illustrates the main pilot flame 54 generated downstream of the pilot burner 36 and its interaction with pilot flame 47 extending from downstream end 68 of the hood.
  • fuel jets 53 emanating from orifices 52 of pilot nozzle 40 are directed outwardly and away from pilot axis 96 into the furnace interior.
  • the gaseous fuel jets 53 have velocities which typically range between 500 to 1500 ft./sec. These high velocities also help mix fuel jets with sufficient air to efficiently burn large quantities of fuel gas delivered through the pilot.
  • Propagation of the flame through gas jets 53 is not sufficient for the flame 54 stabilization.
  • Flow recirculation 58 enhanced by the spinning of fuel emitted from pilot orifices 52 caused by the tangential positioning of the orifices makes the pilot operation efficient and reliable.
  • a tangential component imparted to fuel jets to form a forward-directed spiral motion facilitates the formation of gaseous recirculation patterns.
  • the recirculation component of the gas is a function of the so-called "swirl number" S according to the following formula:
  • pilot nozzle 40 can extend past the downstream end of main burner 4 into burner throat 26.
  • the pilot is recessed into the annular space 34 between coal supply conduit 20 and combustion air conduit 32 to keep the pilot away from the heat, smoke, dust, particulates and the like that are typically present on the interior of coal-fired furnaces, but which are kept out of annular passage 34 and therefore also away from the pilot nozzle by the flow of combustion air.

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

Abstract

L'invention porte sur un procédé et sur un appareil pour préchauffer un four pendant une phase de chauffe du fonctionnement du four. Le four possède des brûleurs principaux avec une alimentation en combustible tubulaire entourée d'une conduite d'air de combustion principale définissant un espace annulaire entre l'alimentation et la conduite, qui s'étend dans une direction axiale du brûleur principal. Une buse pilote dans l'espace annulaire s'étend dans une direction axiale du brûleur vers l'intérieur du four et décharge des jets de combustible fluide aisément allumable à travers des orifices de la buse vers l'intérieur du four. L'air de combustion provenant de la conduite est dirigé derrière la buse et est mélangé avec le combustible déchargé à partir des orifices pour former un mélange allumable qui est allumé pour former une flamme pilote de chauffage du four en aval de la buse. La flamme est stabilisée et ancrée à la buse pilote par la recirculation de parties de la flamme et de ses constituants de l'intérieur du four en retour vers la buse, en empêchant l'air passant à travers la zone d'allumage primaire d'être directement affecté par l'air circulant à travers la conduite d'air de combustion principale, déviant les jets de combustible par rapport à la direction axiale d'un angle se situant entre 20 ° et 80 °, et donnant aux jets de combustible une composante directionnelle tangentielle par rapport à la direction axiale, pour faire tourner la flamme autour de l'axe du pilote.
PCT/US2008/074826 2007-09-06 2008-08-29 Pilote de brûleur avec rotor virtuel WO2009032793A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US96791507P 2007-09-06 2007-09-06
US60/967,915 2007-09-06

Publications (1)

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WO2009032793A1 true WO2009032793A1 (fr) 2009-03-12

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Application Number Title Priority Date Filing Date
PCT/US2008/074826 WO2009032793A1 (fr) 2007-09-06 2008-08-29 Pilote de brûleur avec rotor virtuel

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US (1) US20090068601A1 (fr)
AR (1) AR068220A1 (fr)
TW (1) TW200928234A (fr)
WO (1) WO2009032793A1 (fr)

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Publication number Priority date Publication date Assignee Title
EP2244015A1 (fr) * 2009-04-23 2010-10-27 Siemens Aktiengesellschaft Brûleur à prémélange

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CA2747467A1 (fr) 2008-12-17 2010-06-24 Sanjay Udani Systeme pour effectuer des essais cliniques
CN101985558B (zh) * 2010-08-19 2012-01-04 西峡龙成特种材料有限公司 煤物质的分解设备
CN101922713B (zh) * 2010-08-30 2013-01-16 中国人民解放军总后勤部军需装备研究所 一种用引导火焰点火的丙烷气体燃烧器
KR102211258B1 (ko) * 2016-07-26 2021-02-02 제이에프이 스틸 가부시키가이샤 전기로용 조연 버너
US11519606B1 (en) * 2021-08-17 2022-12-06 Haler US Appliance Solutions, Inc. Burner with an optional pilot

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US4628832A (en) * 1986-01-29 1986-12-16 Coen Company, Inc. Dual fuel pilot burner for a furnace
US5328355A (en) * 1991-09-26 1994-07-12 Hitachi, Ltd. Combustor and combustion apparatus
US5810575A (en) * 1997-03-05 1998-09-22 Schwartz; Robert E. Flare apparatus and methods
EP0900981B1 (fr) * 1997-09-04 2002-05-15 Ansaldo Caldaie S.P.A. Allumeur pilote pour brûleur
US20030036029A1 (en) * 2001-08-20 2003-02-20 Jianhui Hong Ultra-stable flare pilot and methods
US20040200393A1 (en) * 2003-04-09 2004-10-14 Bert Zauderer Production of hydrogen and removal and sequestration of carbon dioxide from coal-fired furnaces and boilers

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US3998582A (en) * 1973-08-28 1976-12-21 Robertshaw Controls Company Gaseous fuel burner system
EP1239219A4 (fr) * 1999-12-15 2003-03-12 Osaka Gas Co Ltd Distributeur de fluide, dispositif a bruleur, moteur de turbine a gaz, et systeme cogenerateur
US7303388B2 (en) * 2004-07-01 2007-12-04 Air Products And Chemicals, Inc. Staged combustion system with ignition-assisted fuel lances

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Publication number Priority date Publication date Assignee Title
US4628832A (en) * 1986-01-29 1986-12-16 Coen Company, Inc. Dual fuel pilot burner for a furnace
US5328355A (en) * 1991-09-26 1994-07-12 Hitachi, Ltd. Combustor and combustion apparatus
US5810575A (en) * 1997-03-05 1998-09-22 Schwartz; Robert E. Flare apparatus and methods
EP0900981B1 (fr) * 1997-09-04 2002-05-15 Ansaldo Caldaie S.P.A. Allumeur pilote pour brûleur
US20030036029A1 (en) * 2001-08-20 2003-02-20 Jianhui Hong Ultra-stable flare pilot and methods
US20040200393A1 (en) * 2003-04-09 2004-10-14 Bert Zauderer Production of hydrogen and removal and sequestration of carbon dioxide from coal-fired furnaces and boilers

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2244015A1 (fr) * 2009-04-23 2010-10-27 Siemens Aktiengesellschaft Brûleur à prémélange
WO2010121845A1 (fr) * 2009-04-23 2010-10-28 Siemens Aktiengesellschaft Brûleur à prémélange
CN102414514A (zh) * 2009-04-23 2012-04-11 西门子公司 预混合燃烧器
CN102414514B (zh) * 2009-04-23 2014-08-20 西门子公司 预混合燃烧器

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AR068220A1 (es) 2009-11-11
TW200928234A (en) 2009-07-01
US20090068601A1 (en) 2009-03-12

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