US20120174838A1 - Combustion Apparatus - Google Patents

Combustion Apparatus Download PDF

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Publication number
US20120174838A1
US20120174838A1 US13/386,185 US201013386185A US2012174838A1 US 20120174838 A1 US20120174838 A1 US 20120174838A1 US 201013386185 A US201013386185 A US 201013386185A US 2012174838 A1 US2012174838 A1 US 2012174838A1
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United States
Prior art keywords
gas
combustion
burner
air
input conduit
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.)
Abandoned
Application number
US13/386,185
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English (en)
Inventor
Stuart D. Cameron
Euan D Cameron
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.)
Altrad Babcock Ltd
Original Assignee
Doosan Power Systems Ltd
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 Doosan Power Systems Ltd filed Critical Doosan Power Systems Ltd
Assigned to DOOSAN POWER SYSTEMS LIMITED reassignment DOOSAN POWER SYSTEMS LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CAMERON, STUART D, CAMERON, EUAN D
Publication of US20120174838A1 publication Critical patent/US20120174838A1/en
Assigned to DOOSAN POWER SYSTEMS UK LIMITED reassignment DOOSAN POWER SYSTEMS UK LIMITED CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: DOOSAN POWER SYSTEMS LIMITED
Assigned to DOOSAN BABCOCK LIMITED reassignment DOOSAN BABCOCK LIMITED CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: DOOSAN POWER SYSTEMS UK LIMITED
Abandoned legal-status Critical Current

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Classifications

    • 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 
    • F23C6/00—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion
    • F23C6/04—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection
    • F23C6/045—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection with staged combustion in a single enclosure
    • 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 
    • F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
    • F23C9/003—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber for pulverulent fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D1/00—Burners for combustion of pulverulent fuel
    • F23D1/02—Vortex burners, e.g. for cyclone-type combustion apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L7/00—Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam
    • F23L7/007—Supplying oxygen or oxygen-enriched air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L9/00—Passages or apertures for delivering secondary air for completing combustion of fuel 
    • F23L9/02—Passages or apertures for delivering secondary air for completing combustion of fuel  by discharging the air above the fire
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N3/00—Regulating air supply or draught
    • 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 
    • F23C2201/00—Staged combustion
    • F23C2201/10—Furnace staging
    • F23C2201/101—Furnace staging in vertical direction, e.g. alternating lean and rich zones
    • 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 
    • F23C2202/00—Fluegas recirculation
    • F23C2202/20—Premixing fluegas with fuel
    • 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 
    • F23C2202/00—Fluegas recirculation
    • F23C2202/30—Premixing fluegas with combustion air
    • 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
    • F23D2900/00006—Liquid fuel burners using pure oxygen or O2-enriched air as oxidant
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L2900/00—Special arrangements for supplying or treating air or oxidant for combustion; Injecting inert gas, water or steam into the combustion chamber
    • F23L2900/07005—Injecting pure oxygen or oxygen enriched air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L2900/00—Special arrangements for supplying or treating air or oxidant for combustion; Injecting inert gas, water or steam into the combustion chamber
    • F23L2900/07006—Control of the oxygen supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2237/00—Controlling
    • F23N2237/16—Controlling secondary air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2237/00—Controlling
    • F23N2237/24—Controlling height of burner
    • F23N2237/28—Controlling height of burner oxygen as pure oxydant
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Definitions

  • the invention relates to a combustion apparatus, to a fuel burner for a combustion apparatus, and to a method of operating a fuel burner/combustion apparatus.
  • the invention in particular relates to a burner for operation with air or oxyfuel operational conditions.
  • the oxygen required to burn the fuel is supplied via atmospheric air.
  • the combustion of the fuel in air releases the chemical energy stored in the fuel as heat, which is then transferred to the water in the boiler to generate steam.
  • the air is supplied to the boiler via burners, which are typically of low NOx design, and via overfire air ports.
  • the boiler may have one or, more typically, a number of burners and overfire air ports.
  • the burners will typically comprise a fuel stream surrounded by one or more air streams; the air streams may be swirled, the swirling air providing the stabilisation of the flame on the burner.
  • the air may be supplied individually to each burner or overfire air port via ducts, or to a group of burners or overfire air ports via a common plenum typically known as a windbox.
  • the efficiency of combustion (as indicated by the level of carbon monoxide and unburned carbon that remains after combustion is complete) and propensity for the formation of nitrogen oxides (NOx) are related to the quantity of oxygen provided and the rate of mixing of the oxidising media with the combusting fuel. Since the concentration of oxygen in air is fixed, it is necessary to adjust the overall amount of air and/or the proportion of air to the individual registers, and to adjust the proportion of the air supplied to the burners and the overfire air ports to achieve the optimum system performance. However, in a system with fixed burner geometry, the scope for diverting the air from the burners to the overfire air is limited by the minimum flow requirement to the burners that is needed to generate sufficient swirling energy to maintain a stable flame.
  • the combustion process will utilise a recycled flue gas stream to which is added upstream of the burners a pure, or nearly pure, oxygen injection stream to produce a single comburant gas which gives combustion process performance equivalent to that of conventional air firing.
  • the oxygen concentration of the comburant gas is variable, and increases with reducing flue gas recycle rate. This approach is sometimes referred to as “simulated air” firing. A proportion of oxyfuel plant is expected to retain an air firing capability.
  • a feature of “simulated air” firing is that the density of the recycled flue gas and oxygen mixture is generally higher than the air which it replaces and this can lead to reduced local gas velocities within the burner, thereby impairing the stability of a burner designed for air firing when it is operated in oxyfuel combustion mode. Conversely the burner may be designed for adequate gas velocities under oxyfuel firing conditions, leading to excessive pressure drop across the burner when it is fired with air.
  • a burner for a combustion apparatus comprising:
  • oxygen containing gas other than air is intended to cover a second mode gas supply that includes a proportion of oxygen to support combustion at the first stage combustion site but that is not simply air.
  • a bespoke gas supply comprising substantially pure oxygen or a mixture of substantially pure oxygen or other oxygen enriched gas (that is, gas with an oxygen content by volume substantially higher than air) and a second gas, wherein the second gas is other than air, and in particular has a reduced nitrogen content relative to air.
  • the gas supply means is adapted to selectively supply such a mixture to the combustion gas input conduit.
  • the second gas is preferably recycled flue gas.
  • the second mode gas supply thus preferably comprises oxygen enriched recycled flue gas, and optionally further component gases. In other words, the second mode thus comprises an “oxyfuel” firing mode.
  • the second mode gas supply to the combustion gas input conduit may have any proportion of oxygen capable of supporting combustion at the first combustion site.
  • the second mode gas supply has a proportion of oxygen which generally gives combustion process performance equivalent to that achieved with air for example being around 20 to 50%. That is, the second mode comprises a “simulated air” oxyfuel firing mode.
  • the burner is thus switchable between two modes of operation each having a different gas supply and each having a different combustion process.
  • the burner In the first mode the burner is supplied with air and effects two stage combustion operation, that is, with an appreciable proportion of the total combustion air diverted from the burners to overfire air ports.
  • the burner In the second mode the burner is supplied with a bespoke gas comburant and effects a single stage combustion operation, that is, with notionally all of the oxygen containing comburant supplied via the burners and notionally no combustion gas diverted to the overfire air ports.
  • the invention in a first aspect thus allows the burner to be operated selectively under air firing conditions or under oxyfuel combustion conditions, in particular “simulated air” oxyfuel combustion conditions, in a manner which optimises the combustion process without the need to change the burner geometry.
  • the invention in a first aspect thus comprises a burner that is capable of operation with both air and oxyfuel combustion conditions with potential reduction in the negative impacts on flame stability, turndown performance and pressure drop arising from the higher density of flue gas compared to air.
  • the gas supply means is adapted to switchably supply either air or the oxygen containing gas other than air additionally to the fuel input conduit such that the gas at least assists in transporting the fuel to the combustion chamber.
  • the gas supply means is adapted to switchably supply either air or the oxygen containing gas other than air to both of the fuel input conduit and the combustion gas input conduit.
  • the gas supply means includes varying means, such as a baffle or valve means, for varying the proportion of gas supplied to one or both or all where applicable of the fuel input conduit and the combustion gas input conduit and the overfire gas input conduit.
  • a burner thus comprises a primary fuel input conduit supplying fuel to the burner, a secondary combustion gas input conduit supplying comburant gas to a first stage combustion site, and a selectively operable overfire gas input conduit supplying comburant gas to a second stage combustion site.
  • the combustion gas input conduit may comprise plural fluidly independent input conduits, for example comprising additional tertiary or higher order input conduits, fluidly connected to the gas supply means for supplying air or oxygen containing gas to a combustion site defined by the burner, for example directly to the burner or otherwise to a combustion apparatus in which the burner is located.
  • a primary fuel input conduit may extend along a burner, a secondary combustion gas input conduit may be disposed outwardly of and for example annularly arrayed about the primary fuel input conduit, and higher order combustion gas input conduits, where present, may be disposed outwardly of and for example annularly arrayed about the secondary input conduit in familiar manner.
  • the primary input conduit may be a central conduit extending generally axially along the burner, for example on a burner centreline.
  • the primary input conduit may itself be disposed about a central conduit, for example annularly, with the central conduit serving another purpose.
  • the primary input conduit is still preferably nearer to the centre line than the secondary and higher order conduits, but the primary stream does not necessarily flow along the centreline itself.
  • a conduit may include suitable swirl generation structures to impart an axial swirl to a gas supply therein.
  • a combustion apparatus comprising:
  • the combustion apparatus comprises a boiler for generating steam.
  • the fuel used is coal, most preferably pulverised coal.
  • the combustion apparatus includes a flue gas recirculation conduit.
  • the flue gas recirculation conduit is fluidly connected to the gas supply means and/ or to at least one of the fuel input conduit and the combustion gas input conduit such that a mixture including flue gas may be supplied to the combustion chamber during the second mode of operation.
  • the flue gas recirculation conduit is fluidly connected to both of the fuel input conduit and the combustion gas input conduit.
  • a method of firing a burner in a combustion apparatus selectively in two modes of operation comprising in a first mode of operation:
  • the oxygen containing gas comprises a mixture of substantially pure oxygen and a second gas having a reduced oxygen concentration relative to air and/or a reduced nitrogen concentration relative to air.
  • combustion gases are supplied to the combustion site in such manner that the resultant mixture has a proportion of oxygen that produces combustion process performance equivalent to that achieved with air, for example being around 20 to 50%.
  • FIG. 1 is a schematic of a burner suitable for both conventional air firing and oxyfuel firing in accordance with the invention
  • FIG. 2 is a schematic of the overfire principle
  • FIG. 3 is a schematic of the oxyfuel process.
  • FIG. 1 is a schematic of a simple burner suitable for both air firing and oxyfuel firing in accordance with the invention.
  • the combustion air containing the required oxygen to burn the fuel
  • FD fan forced draught fan
  • the primary air (PA) stream follows the burner axis ( 11 ) and the secondary air (SA), and the tertiary air (TA) streams are axially directed in ducts concentrically therearound.
  • the burner ( 1 ) is fired through an outlet in a furnace wall (FW).
  • the primary air stream is in a central conduit.
  • the invention is not limited to such arrangements.
  • One alternative design option involves moving the primary air (or PFGR/Oxygen/Fuel mix) to a conduit annularly parallel to the central line, but with a central cylinder along the axis used for other purposes (core air and/or for oil/gas igniters).
  • core air and/or for oil/gas igniters used for other purposes.
  • the primary stream would still be nearer the centre line than the secondary and tertiary streams, but wouldn't flow along the actual centerline.
  • Dampers ( 3 ) control the division of the air between the secondary and tertiary streams (SA, TA).
  • SA, TA secondary and tertiary air streams
  • the secondary and tertiary air streams may be swirled, and the extent of swirl may be adjustable.
  • Swirl devices ( 5 ) are provided downstream of the dampers for this purpose. Optimisation of the burner with respect to combustion efficiency, emissions, and flame stability is achieved by variation of the total quantity of the air supplied to the burner, the division of the air between the various streams, and the level of swirl applied.
  • FIG. 2 is a general schematic of the overfire principle, with overfire ports located generally above the burners which may be of the general form illustrated in FIG. 1 .
  • the figure shows a typical coal-fired power station arrangement.
  • a combustion chamber ( 13 ) is supplied with coal and combustion air via a multiplicity of burners ( 15 ).
  • the air supply to each burner is split into primary air (to convey the coal), and secondary and tertiary air to the windbox ( 16 ) (the split being to control the mixing and aerodynamics in a low NOx burner).
  • a proportion of the combustion air is supplied separately as overfire air through a multiplicity of ports ( 17 ) (generally above the burners) to facilitate NOx control.
  • FIG. 3 is a schematic of the oxyfuel process.
  • flue gas is recycled to the coal pulverising mill ( 21 ) (primary flue gas recycle, or PFGR) and to the windbox ( 23 ) containing the burners (not specifically shown in FIG. 3 ) (secondary flue gas recycle, or SFGR) by means of dedicated fans (respectively the primary flue gas recycle fan 25 and the secondary flue gas recycle fan 27 ); there are numerous detailed variants of this process, but they all follow the same generic method.
  • the composition of the recycled flue gas is related to the combustion process, but the stream extracted from the boiler exit will contain low levels of oxygen, typically less than 5% by volume, and insufficient to support combustion. Pure, or nearly pure, oxygen is introduced into the PFGR and SFGR streams to provide the oxidant required to combust the fuel.
  • the composition of the PFGR and SFGR streams will depend upon the detailed implementation of the oxyfuel technology, but typically the PFGR will contain around 20 to 25% by volume of oxygen or higher, whereas the SFGR will contain a significantly higher oxygen concentration, for example 25 to 50% .
  • concentration levels will be dependent upon a number of factors including the overall furnace stoichiometry, the quantity of flue gas that is recycled to the boiler, the amount of combustion generated moisture that is removed from the recycle stream, the amount of air that leaks into the process, etc.
  • the streams supply burners (not specifically shown) via the windbox ( 23 ) to fire the furnace/boiler ( 31 ) in generally known manner, with flue gases being drawn off via a particulate removal system ( 33 ) to remove solids (ash, etc, 34 ) and drawn by means of an induced draught (ID) fan ( 35 ) to a stack or capture stage ( 37 ) as will be familiar.
  • a particulate removal system 33
  • solids ash, etc, 34
  • ID induced draught
  • a key process design parameter for the “simulated air” implementation of oxyfuel technology is the quantity of recycled flue gas, usually expressed as a percentage of the total flow in the boiler. This parameter is selected on the basis of maintaining, as far as is possible, the radiative and convective heat transfer properties of an oxyfuel fired boiler relative to air firing; recycle gas flow rates of between 60% and 80% of the boiler gas flow are often quoted. Based upon these typical quantities, and the physical properties of the oxygen/recycled flue gas mixture, it is possible to establish the velocities within the burner when it is operated under “simulated air” oxyfuel firing conditions. As noted previously, gas velocities within the burner are lower for oxyfuel firing than for air firing.
  • Second B This is an air fired burner designed to operate under air staging conditions (where some of the combustion air is diverted away from the burners to overfire air ports).
  • the primary air velocity is maintained to ensure the effective conveying of the coal to the burner outlet as previously, and the burner diameter is reduced so that the tertiary air velocity is maintained at the previous value in spite of the reduced mass flow.
  • the invention thus comprises a design of burner that can operate under either air firing or oxyfuel (“simulated air”) firing without the need for geometric or other process changes.
  • the burner is sized to operate under air staging conditions with a stoichiometric air to fuel ratio lower than that typical of single stage operation.
  • the invention allows the burner to be operated under air firing conditions.
  • the invention allows the same burner to be operated under “simulated air” oxyfuel combustion conditions.
  • the invention allows both of the above without the need to change the burner geometry, settings, or relative flow splits between secondary and tertiary (or other) registers.
  • the invention allows the burner to operate in air or oxyfuel mode with acceptable velocities for the maintenance of both flame stability and acceptable pressure drop across the full normal operational load range of 40% to 110% of the normal rated burner capacity.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
US13/386,185 2009-07-23 2010-07-23 Combustion Apparatus Abandoned US20120174838A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GBGB0912769.7A GB0912769D0 (en) 2009-07-23 2009-07-23 Combustion apparatus
GB0912769.7 2009-07-23
PCT/GB2010/051217 WO2011010161A1 (fr) 2009-07-23 2010-07-23 Appareil de combustion

Publications (1)

Publication Number Publication Date
US20120174838A1 true US20120174838A1 (en) 2012-07-12

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Application Number Title Priority Date Filing Date
US13/386,185 Abandoned US20120174838A1 (en) 2009-07-23 2010-07-23 Combustion Apparatus

Country Status (6)

Country Link
US (1) US20120174838A1 (fr)
EP (1) EP2457020B1 (fr)
KR (1) KR101814687B1 (fr)
CA (1) CA2805689C (fr)
GB (1) GB0912769D0 (fr)
WO (1) WO2011010161A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220090782A1 (en) * 2020-09-18 2022-03-24 Huazhong University Of Science And Technology Supercritical co2 boiler capable of realizing uniform combustion, corrosion resistance and coking resistance, and boiler system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB201114894D0 (en) * 2011-08-30 2011-10-12 Doosan Power Systems Ltd Combustion apparatus

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6938560B2 (en) * 2002-12-26 2005-09-06 Hitachi, Ltd. Solid fuel boiler and method of operating combustion apparatus
US20060191451A1 (en) * 2005-02-25 2006-08-31 Clean Combustion Technologies Llc Combustion method and system
US20080006188A1 (en) * 2006-07-06 2008-01-10 Kuang Tsai Wu Increasing boiler output with oxygen
US20080264310A1 (en) * 2005-11-22 2008-10-30 Clean Combustion Technologies, Llc Combustion Method and System

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL212230B1 (pl) * 2002-05-15 2012-08-31 Praxair Technology Inc Sposób spalania paliw węglowodorowych
US7497682B2 (en) * 2005-01-18 2009-03-03 Praxair Technology, Inc. Method of operating furnace to reduce emissions
WO2007062019A2 (fr) * 2005-11-22 2007-05-31 Clean Combustion Technologies Llc Procede et systeme de combustion
US9651253B2 (en) * 2007-05-15 2017-05-16 Doosan Power Systems Americas, Llc Combustion apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6938560B2 (en) * 2002-12-26 2005-09-06 Hitachi, Ltd. Solid fuel boiler and method of operating combustion apparatus
US20060191451A1 (en) * 2005-02-25 2006-08-31 Clean Combustion Technologies Llc Combustion method and system
US20080250990A1 (en) * 2005-02-25 2008-10-16 Clean Combustion Technologies, Llc Combustion Method and System
US20080264310A1 (en) * 2005-11-22 2008-10-30 Clean Combustion Technologies, Llc Combustion Method and System
US20080006188A1 (en) * 2006-07-06 2008-01-10 Kuang Tsai Wu Increasing boiler output with oxygen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220090782A1 (en) * 2020-09-18 2022-03-24 Huazhong University Of Science And Technology Supercritical co2 boiler capable of realizing uniform combustion, corrosion resistance and coking resistance, and boiler system
US11493202B2 (en) * 2020-09-18 2022-11-08 Huazhong University Of Science And Technology Supercritical CO2 boiler capable of realizing uniform combustion, corrosion resistance and coking resistance, and boiler system

Also Published As

Publication number Publication date
EP2457020A1 (fr) 2012-05-30
EP2457020B1 (fr) 2016-11-02
CA2805689A1 (fr) 2011-01-27
KR101814687B1 (ko) 2018-01-04
WO2011010161A1 (fr) 2011-01-27
CA2805689C (fr) 2017-05-09
GB0912769D0 (en) 2009-08-26
KR20120064671A (ko) 2012-06-19

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