US20140157790A1 - Combustor assembly and methods of using same - Google Patents
Combustor assembly and methods of using same Download PDFInfo
- Publication number
- US20140157790A1 US20140157790A1 US13/709,939 US201213709939A US2014157790A1 US 20140157790 A1 US20140157790 A1 US 20140157790A1 US 201213709939 A US201213709939 A US 201213709939A US 2014157790 A1 US2014157790 A1 US 2014157790A1
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- United States
- Prior art keywords
- burner assembly
- combustor
- biomass
- assembly
- inlet
- 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
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R5/00—Continuous combustion chambers using solid or pulverulent 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
- F23C1/00—Combustion apparatus specially adapted for combustion of two or more kinds of fuel simultaneously or alternately, at least one kind of fuel being either a fluid fuel or a solid fuel suspended in a carrier gas or air
- F23C1/12—Combustion apparatus specially adapted for combustion of two or more kinds of fuel simultaneously or alternately, at least one kind of fuel being either a fluid fuel or a solid fuel suspended in a carrier gas or air gaseous and pulverulent fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D17/00—Burners for combustion conjointly or alternatively of gaseous or liquid or pulverulent fuel
- F23D17/005—Burners for combustion conjointly or alternatively of gaseous or liquid or pulverulent fuel gaseous or pulverulent fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
- F23G5/033—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment comminuting or crushing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
- F23G5/46—Recuperation of heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/10—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of field or garden waste or biomasses
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J9/00—Preventing premature solidification of molten combustion residues
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C2201/00—Staged combustion
- F23C2201/20—Burner staging
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C2900/00—Special features of, or arrangements for combustion apparatus using fluid fuels or solid fuels suspended in air; Combustion processes therefor
- F23C2900/06043—Burner staging, i.e. radially stratified flame core burners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2201/00—Burners adapted for particulate solid or pulverulent fuels
- F23D2201/20—Fuel flow guiding devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2208/00—Control devices associated with burners
- F23D2208/10—Sensing devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2204/00—Supplementary heating arrangements
- F23G2204/10—Supplementary heating arrangements using auxiliary fuel
- F23G2204/103—Supplementary heating arrangements using auxiliary fuel gaseous or liquid fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2206/00—Waste heat recuperation
- F23G2206/20—Waste heat recuperation using the heat in association with another installation
- F23G2206/203—Waste heat recuperation using the heat in association with another installation with a power/heat generating installation
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- 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
- Y02E20/12—Heat utilisation in combustion or incineration of waste
Definitions
- One embodiment of the present disclosure relates generally to a combustor assembly, more particularly, but not by way of limitation, to an improved combustor assembly and method for improving slagging in a combustor.
- Many power systems have a combustor which is operated by the controlled combustion of various solid fuel sources or feedstocks to generate electricity by driving gas turbines.
- solid fuel sources utilized in the systems are conventional fossil fuels, other hydrocarbons, and biomass.
- biomass include, but are not limited to sawdust, bark, twigs, branches, and other waste wood, bagasse, corn cobs, rice hulls, orchard and vine trimmings, and the like.
- combustion of these fuels is incomplete, producing large amounts of waste material.
- All solid fuels contain a mineral fraction that is mostly non-combustible and produces waste material, such as ash.
- Incomplete combustion of biomass produces ash that accumulates on a heat transfer or interior surface of a combustor. As molten ash cools, the ash accumulates on the interior surfaces of the combustion chamber causing various problems with the operation of the combustor and the power system.
- Deposit of formations of ash (“slagging”) is one of the biggest problems of combustion of biomass. The ability of a system to reduce/improve slagging would lead to reduced investment and operational costs, increased performance efficiency, and reduced emissions.
- a burner assembly includes a body, a biomass inlet, a primary air inlet, a gas inlet, and a secondary inlet.
- the body has a first end, an open second end, and a center passageway extending therebetween.
- the biomass inlet receives biomass such that the biomass inlet is in communication with the center passageway so that biomass is injected from the center passageway by the open second end along a tangential centerline of the body.
- the primary air inlet receives primary air.
- the gas inlet receives a gas.
- the secondary air inlet receives secondary air.
- a combustor assembly includes a burner assembly and a combustor.
- a burner assembly includes a body, a biomass inlet, a primary air inlet, a gas inlet, and a secondary inlet.
- the body has a first end, an open second end, and a center passageway extending therebetween.
- the biomass inlet receives biomass such that the biomass inlet is in communication with the center passageway so that biomass is injected from the center passageway by the open second end along a tangential centerline of the body.
- the primary air inlet receives primary air.
- the gas inlet receives a gas.
- the secondary air inlet receives secondary air.
- the burner assembly is connected to a combustor.
- Biomass feed material is injected into a center passageway of a body of a burner assembly.
- Primary air, gas, and secondary air are injected into the body of the burner assembly.
- the biomass feed material is injected along a tangential centerline of the body of the burner assembly into a combustor.
- FIG. 1 is a cross-sectional view of a combustor assembly constructed in accordance with the present invention.
- FIG. 2 is a cross-sectional view of a burner assembly of the combustor assembly of FIG. 1 .
- FIG. 3 is a front view of a second end of the burner assembly of FIG. 2 .
- FIG. 4 is a cross-sectional view of a portion of a combustor of the combustor assembly of FIG. 1 .
- the combustor assembly 10 includes a burner assembly 12 and a combustor 14 .
- the feed system may be any such system for feeding biomass into a system known to one of ordinary skill in the art so long as the feed system functions in accordance with the present invention.
- the gas turbine may be any suitable gas turbine known by one of ordinary skill in the art.
- the gas turbine may be a gas-fired turbine.
- the gas turbine may have any of a variety of pressure ratios, for example, gas turbines suitable for use may have pressure ratios in the range of from about 4:1 to about 20:1.
- the gas turbine may be capable of dual firing, wherein the gas turbine may be fired using an auxiliary fuel, for example, gas, propane, or a liquid fuel.
- one embodiment of the burner assembly 12 includes a body 16 having a first end 18 , a second end 20 , a biomass inlet 22 , a primary air inlet 24 , a gas inlet 26 , and a secondary air inlet 28 and a powder cone assembly 30 .
- the body 16 may be any size and shape so long as the body 16 functions in accordance with the present disclosure.
- the biomass inlet 22 is provided for receiving biomass from a feed system (not shown).
- Biomass may include any suitable source of biomass, including, sawdust, bark, twigs, branches, other waste wood, bagasse, corn cobs, rice hulls, orchard and vine trimmings, sludge, manure, and combinations thereof.
- the biomass supplied to the combustor assembly 10 includes a wood-based biomass.
- the biomass supplied to the combustor assembly 10 may be sized so that it has a major dimension of less than about 3 millimeters (“mm”).
- the biomass also may have moisture content suitable for combustion, for example, the biomass may be dried so that they have a moisture content of less than about 30% and, in one embodiment, a moisture content in the range of from about 0% to about 20%.
- combustion generally may have various feed requirements (e.g., size, moisture content, etc.).
- biomass is used, by way of example, as the fuel source for the combustor assembly 10 , any known fuel source may be utilized, such as fossil fuels and the like, so long as the fuel used allows the combustor assembly 10 to function in accordance with the present disclosure as described herein.
- Biomass is fed through the biomass inlet 22 to the biomass intake tube 32 which is in communication with a substantially center passageway 34 extending between the first end 18 and the second end 20 of the body 16 of the burner assembly 12 .
- the position and configuration of the center passageway 34 of the burner assembly 12 allows for centerline tangential injection of the biomass feed into the combustor 14 .
- Centerline injection of the feed into the combustor 14 keeps ash off an interior surface of the combustor 14 which improves slagging in the combustor 14 .
- Primary air is provided to the body 16 through the primary air inlet 24 to the primary air intake tube 40 which is in communication with a primary air tube 42 .
- the primary air tube 42 is in communication with a primary air register 44 .
- Gas such as propane, butane, propane-butane mix, methane, and the like, is provided to the body 16 through the gas inlet 26 to the gas intake tube 50 which is in communication with a gas tube 52 .
- the gas tube 52 is in communication with a gas ring 54 .
- Secondary air is fed to the body 16 through the secondary air inlet 28 to the secondary air intake tube 60 which is in communication with a secondary air tube 62 .
- the secondary air tube 62 is in communication with a secondary air register 64 .
- the primary air and the secondary air may be air, pure oxygen, and/or oxygen-enriched air in various proportions.
- the primary air register 44 , the gas ring 54 , and the secondary air register 64 are disposed in a concentric configuration about the center passageway 34 ( FIG. 3 ).
- the concentric configuration allows for the centerline tangential injection of the biomass feed from the center passageway 34 into the combustor 14 .
- the powder cone assembly 30 is provided with a rod 70 , a powder cone 72 , and a threaded rod 74 .
- the rod 70 having a first end 76 and a second end 78 is substantially disposed in the center passageway 34 of the body 16 of the combustor assembly 10 .
- the powder cone 72 is disposed on the first end 76 of the rod 70 .
- One end of the threaded rod 74 is connected to the second end 78 of the rod 70 with a pin 80 .
- the threaded rod 74 is connected to an internally threaded flange 82 which is connected to a flange 84 disposed on the first end 18 of the body 16 of the burner assembly 12 .
- the distance between the powder cone 72 and the open second end 20 of the body 16 of the burner assembly 12 may be varied by moving the threaded rod 74 so that the rod 70 moves between a first direction and a second direction. In the first direction, the powder cone 72 moves away from the second end 20 of the body 16 of the burner assembly 12 and in the second direction, the powder cone 72 moves toward the second end 20 of the body 16 of the burner assembly 12 . It should be understood that the powder cone 72 may be configured in various ways so long as the powder cone 72 is movable between the first and second directions as described herein.
- the body 16 of the burner assembly 12 is also provided with a flame detector 90 for monitoring the formation of a stable combustion region in the burner assembly 12 and a sight glass 92 .
- the combustor 14 includes a housing 100 and a chamber 102 having a sidewall 104 disposed in the housing 100 .
- the housing 100 has a first end 106 and a second end 108 .
- the first end 106 of the housing 100 is provided with an opening 110 disposed substantially along a centerline of the housing 100 of the combustor 14 .
- the opening 110 substantially tapers outwardly from the first end 106 of the housing 100 of the combustor 14 toward the chamber 102 of the housing 100 .
- the second end 20 of the body 16 of the burner assembly 12 and the first end 106 of the housing 100 of the combustor 14 are shaped and configured so that the second end 20 of the body 16 of the burner assembly 12 is disposed in the chamber 102 of the housing 100 of the combustor 14 .
- the second end 20 of the body 16 of the burner assembly 12 is provided with a flange 112 for connecting to an external flange 114 extending a distance from the first end 106 of the housing 100 of the combustor 14 which connects the burner assembly 12 to the combustor 14 .
- the combustor 14 may be any size and shape so long as the combustor 14 functions in accordance with the present disclosure as described herein.
Abstract
One embodiment of the present disclosure relates to a combustor assembly which has a burner assembly and a combustor. The burner assembly has a body having a first end and a second end and a center passageway. The center passageway extends between the first end and the second end of the body. The body of the burner assembly is provided with a biomass inlet for receiving biomass, a primary air inlet for receiving air, a gas inlet for receiving gas, and a secondary air inlet for receiving air. The biomass inlet is in communication with the center passageway.
Description
- Not applicable.
- Not applicable.
- One embodiment of the present disclosure relates generally to a combustor assembly, more particularly, but not by way of limitation, to an improved combustor assembly and method for improving slagging in a combustor.
- Many power systems have a combustor which is operated by the controlled combustion of various solid fuel sources or feedstocks to generate electricity by driving gas turbines. Examples of solid fuel sources utilized in the systems are conventional fossil fuels, other hydrocarbons, and biomass. Examples of biomass include, but are not limited to sawdust, bark, twigs, branches, and other waste wood, bagasse, corn cobs, rice hulls, orchard and vine trimmings, and the like. However, typically, combustion of these fuels is incomplete, producing large amounts of waste material.
- All solid fuels contain a mineral fraction that is mostly non-combustible and produces waste material, such as ash. Incomplete combustion of biomass produces ash that accumulates on a heat transfer or interior surface of a combustor. As molten ash cools, the ash accumulates on the interior surfaces of the combustion chamber causing various problems with the operation of the combustor and the power system. Deposit of formations of ash (“slagging”) is one of the biggest problems of combustion of biomass. The ability of a system to reduce/improve slagging would lead to reduced investment and operational costs, increased performance efficiency, and reduced emissions.
- To this end, although combustor assemblies are known in the art, further improvements are desirable to improve or reduce slagging in the combustor and to enhance the combustor assembly for complete combustion of a fuel source. It is to such an assembly and process that one embodiment of the present disclosure is directed.
- A burner assembly includes a body, a biomass inlet, a primary air inlet, a gas inlet, and a secondary inlet. The body has a first end, an open second end, and a center passageway extending therebetween. The biomass inlet receives biomass such that the biomass inlet is in communication with the center passageway so that biomass is injected from the center passageway by the open second end along a tangential centerline of the body. The primary air inlet receives primary air. The gas inlet receives a gas. The secondary air inlet receives secondary air.
- A combustor assembly includes a burner assembly and a combustor. A burner assembly includes a body, a biomass inlet, a primary air inlet, a gas inlet, and a secondary inlet. The body has a first end, an open second end, and a center passageway extending therebetween. The biomass inlet receives biomass such that the biomass inlet is in communication with the center passageway so that biomass is injected from the center passageway by the open second end along a tangential centerline of the body. The primary air inlet receives primary air. The gas inlet receives a gas. The secondary air inlet receives secondary air. The burner assembly is connected to a combustor.
- A method of operating a combustor assembly. Biomass feed material is injected into a center passageway of a body of a burner assembly. Primary air, gas, and secondary air are injected into the body of the burner assembly. The biomass feed material is injected along a tangential centerline of the body of the burner assembly into a combustor.
-
FIG. 1 is a cross-sectional view of a combustor assembly constructed in accordance with the present invention. -
FIG. 2 is a cross-sectional view of a burner assembly of the combustor assembly ofFIG. 1 . -
FIG. 3 is a front view of a second end of the burner assembly ofFIG. 2 . -
FIG. 4 is a cross-sectional view of a portion of a combustor of the combustor assembly ofFIG. 1 . - Referring now to the drawings, and more particularly to
FIG. 1 , shown therein is one embodiment of acombustor assembly 10 constructed in accordance with the present disclosure. Thecombustor assembly 10 includes aburner assembly 12 and acombustor 14. It should be understood by one of ordinary skill in the art that thecombustor assembly 10 may be utilized in a system having a feed system and a gas turbine. The feed system may be any such system for feeding biomass into a system known to one of ordinary skill in the art so long as the feed system functions in accordance with the present invention. Further, the gas turbine may be any suitable gas turbine known by one of ordinary skill in the art. For example, the gas turbine may be a gas-fired turbine. Also, the gas turbine may have any of a variety of pressure ratios, for example, gas turbines suitable for use may have pressure ratios in the range of from about 4:1 to about 20:1. Furthermore, the gas turbine may be capable of dual firing, wherein the gas turbine may be fired using an auxiliary fuel, for example, gas, propane, or a liquid fuel. - Referring now to
FIGS. 1-3 , generally, one embodiment of theburner assembly 12 includes abody 16 having afirst end 18, asecond end 20, a biomass inlet 22, aprimary air inlet 24, agas inlet 26, and asecondary air inlet 28 and apowder cone assembly 30. Thebody 16 may be any size and shape so long as thebody 16 functions in accordance with the present disclosure. Thebiomass inlet 22 is provided for receiving biomass from a feed system (not shown). Biomass may include any suitable source of biomass, including, sawdust, bark, twigs, branches, other waste wood, bagasse, corn cobs, rice hulls, orchard and vine trimmings, sludge, manure, and combinations thereof. In one embodiment, the biomass supplied to thecombustor assembly 10 includes a wood-based biomass. The biomass supplied to thecombustor assembly 10 may be sized so that it has a major dimension of less than about 3 millimeters (“mm”). Further, the biomass also may have moisture content suitable for combustion, for example, the biomass may be dried so that they have a moisture content of less than about 30% and, in one embodiment, a moisture content in the range of from about 0% to about 20%. Those of ordinary skill in the art should recognize that combustion generally may have various feed requirements (e.g., size, moisture content, etc.). Further, it should be understood by one of ordinary skill in the art that although biomass is used, by way of example, as the fuel source for thecombustor assembly 10, any known fuel source may be utilized, such as fossil fuels and the like, so long as the fuel used allows thecombustor assembly 10 to function in accordance with the present disclosure as described herein. - Biomass is fed through the
biomass inlet 22 to thebiomass intake tube 32 which is in communication with a substantiallycenter passageway 34 extending between thefirst end 18 and thesecond end 20 of thebody 16 of theburner assembly 12. The position and configuration of thecenter passageway 34 of theburner assembly 12 allows for centerline tangential injection of the biomass feed into thecombustor 14. Centerline injection of the feed into thecombustor 14 keeps ash off an interior surface of thecombustor 14 which improves slagging in thecombustor 14. - Primary air is provided to the
body 16 through theprimary air inlet 24 to the primaryair intake tube 40 which is in communication with aprimary air tube 42. Theprimary air tube 42 is in communication with aprimary air register 44. - Gas, such as propane, butane, propane-butane mix, methane, and the like, is provided to the
body 16 through thegas inlet 26 to thegas intake tube 50 which is in communication with agas tube 52. Thegas tube 52 is in communication with agas ring 54. - Secondary air is fed to the
body 16 through thesecondary air inlet 28 to the secondaryair intake tube 60 which is in communication with asecondary air tube 62. Thesecondary air tube 62 is in communication with asecondary air register 64. It should be understood by one of ordinary skill in the art that the primary air and the secondary air may be air, pure oxygen, and/or oxygen-enriched air in various proportions. - The
primary air register 44, thegas ring 54, and thesecondary air register 64 are disposed in a concentric configuration about the center passageway 34 (FIG. 3 ). The concentric configuration allows for the centerline tangential injection of the biomass feed from thecenter passageway 34 into thecombustor 14. - The
powder cone assembly 30 is provided with arod 70, apowder cone 72, and a threadedrod 74. Therod 70 having afirst end 76 and asecond end 78 is substantially disposed in thecenter passageway 34 of thebody 16 of thecombustor assembly 10. Thepowder cone 72 is disposed on thefirst end 76 of therod 70. One end of the threadedrod 74 is connected to thesecond end 78 of therod 70 with apin 80. The threadedrod 74 is connected to an internally threadedflange 82 which is connected to aflange 84 disposed on thefirst end 18 of thebody 16 of theburner assembly 12. The distance between thepowder cone 72 and the opensecond end 20 of thebody 16 of theburner assembly 12 may be varied by moving the threadedrod 74 so that therod 70 moves between a first direction and a second direction. In the first direction, thepowder cone 72 moves away from thesecond end 20 of thebody 16 of theburner assembly 12 and in the second direction, thepowder cone 72 moves toward thesecond end 20 of thebody 16 of theburner assembly 12. It should be understood that thepowder cone 72 may be configured in various ways so long as thepowder cone 72 is movable between the first and second directions as described herein. - The
body 16 of theburner assembly 12 is also provided with aflame detector 90 for monitoring the formation of a stable combustion region in theburner assembly 12 and asight glass 92. - Referring now to
FIGS. 1 and 4 , broadly, thecombustor 14 includes ahousing 100 and achamber 102 having asidewall 104 disposed in thehousing 100. Thehousing 100 has afirst end 106 and asecond end 108. Thefirst end 106 of thehousing 100 is provided with anopening 110 disposed substantially along a centerline of thehousing 100 of thecombustor 14. Theopening 110 substantially tapers outwardly from thefirst end 106 of thehousing 100 of thecombustor 14 toward thechamber 102 of thehousing 100. - The
second end 20 of thebody 16 of theburner assembly 12 and thefirst end 106 of thehousing 100 of thecombustor 14 are shaped and configured so that thesecond end 20 of thebody 16 of theburner assembly 12 is disposed in thechamber 102 of thehousing 100 of thecombustor 14. Thesecond end 20 of thebody 16 of theburner assembly 12 is provided with aflange 112 for connecting to anexternal flange 114 extending a distance from thefirst end 106 of thehousing 100 of thecombustor 14 which connects theburner assembly 12 to thecombustor 14. It should be understood by one of ordinary skill in the art that thecombustor 14 may be any size and shape so long as the combustor 14 functions in accordance with the present disclosure as described herein. - From the above description, it is clear that the present disclosure is well adapted to carry out the objects and to attain the advantages mentioned herein, as well as those inherent in the invention. While present embodiments have been described for purposes of this disclosure, it will be understood that numerous changes may be made which will readily suggest themselves to those skilled in the art and which are accomplished within the spirit of the invention as disclosed and claimed herein.
Claims (20)
1. A burner assembly, comprising:
a body having a first end and an open second end and a center passageway extending therebetween;
a biomass inlet for receiving biomass such that the biomass inlet is in communication with the center passageway so that biomass is injected from the center passageway by the open second end along a tangential centerline of the body;
a primary air inlet for receiving primary air;
a gas inlet for receiving a gas; and
a secondary air inlet for receiving secondary air.
2. The burner assembly of claim 1 further comprising a biomass intake tube in communication with the center passageway of the body.
3. The burner assembly of claim 1 wherein the primary air inlet is in communication with a primary air register.
4. The burner assembly of claim 1 further comprising a gas ring in communication with the gas inlet.
5. The burner assembly of claim 1 wherein the primary air is air, pure oxygen, or oxygen-enriched air.
6. The burner assembly of claim 1 wherein the secondary air is air, pure oxygen, or oxygen-enriched air.
7. The burner assembly of claim 1 further comprising a powder cone substantially disposed in the center passageway of the body of the burner assembly.
8. The burner assembly of claim 7 wherein the powder cone is movable so that the distance varies between the powder cone and the second end of the body of the burner assembly.
9. A combustor assembly, comprising:
a burner assembly comprising:
a body having a first end and an open second end and a center passageway extending therebetween;
a biomass inlet for receiving biomass such that the biomass inlet is in communication with the center passageway so that biomass is injected from the center passageway by the open second end along a tangential centerline of the body;
a primary air inlet for receiving primary air;
a gas inlet for receiving a gas; and
secondary air inlet for receiving secondary air; and
a combustor connected to the burner assembly.
10. The combustor assembly of claim 9 further comprising a biomass intake tube in communication with the center passageway of the body.
11. The combustor assembly of claim 9 wherein the primary air inlet is in communication with a primary air register.
12. The combustor assembly of claim 9 further comprising a gas ring in communication with the gas inlet.
13. The combustor assembly of claim 9 wherein the primary air is air, pure oxygen, or oxygen-enriched air.
14. The combustor assembly of claim 9 wherein the secondary air is air, pure oxygen, or oxygen-enriched air.
15. The combustor assembly of claim 9 further comprising a powder cone substantially disposed in the center passageway of the body of the burner assembly.
16. The combustor assembly of claim 15 wherein the powder cone is movable so that the distance varies between the powder cone and the second end of the body of the burner assembly.
17. The combustor assembly of claim 9 wherein the second end of the body of the burner assembly and an end of the combustor are shaped and configured so that the second end of the body of the burner assembly is disposed in a portion of the combustor.
18. A method of operating a combustor assembly, comprising the steps of:
injecting a biomass feed material into a center passageway of a body of a burner assembly;
injecting primary air into the body of the burner assembly;
injecting gas into the body of the burner assembly;
injecting secondary air into the body of the burner assembly; and
injecting the biomass feed material along a tangential centerline of the body of the burner assembly into a combustor.
19. The method of claim 18 further comprising drying the biomass feed material to a moisture content of less than about 30%.
20. The method of claim 18 further comprising:
moving a powder cone of the burner assembly a distance between the powder cone and an end of the body of the burner assembly.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/709,939 US20140157790A1 (en) | 2012-12-10 | 2012-12-10 | Combustor assembly and methods of using same |
PCT/US2013/074115 WO2014093336A1 (en) | 2012-12-10 | 2013-12-10 | Combustor assembly and methods of using same |
CA2894523A CA2894523A1 (en) | 2012-12-10 | 2013-12-10 | Combustor assembly and methods of using same |
RU2015127774A RU2015127774A (en) | 2012-12-10 | 2013-12-10 | COMBUSTION CHAMBER ASSEMBLY AND METHODS OF ITS USE |
EP13862536.3A EP2929244A4 (en) | 2012-12-10 | 2013-12-10 | Combustor assembly and methods of using same |
Applications Claiming Priority (1)
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US13/709,939 US20140157790A1 (en) | 2012-12-10 | 2012-12-10 | Combustor assembly and methods of using same |
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US20140157790A1 true US20140157790A1 (en) | 2014-06-12 |
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US13/709,939 Abandoned US20140157790A1 (en) | 2012-12-10 | 2012-12-10 | Combustor assembly and methods of using same |
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US (1) | US20140157790A1 (en) |
EP (1) | EP2929244A4 (en) |
CA (1) | CA2894523A1 (en) |
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WO (1) | WO2014093336A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104456630A (en) * | 2014-11-19 | 2015-03-25 | 西安交通大学 | Slagging-preventing gas turbine combustion chamber with biomass fuel utilized |
US20190271465A1 (en) * | 2016-07-26 | 2019-09-05 | Jfe Steel Corporation | Auxiliary burner for electric furnace |
US11578652B2 (en) | 2019-08-12 | 2023-02-14 | Enexor Energy, Llc | Combined heat and power system and method of operation |
Citations (37)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1613265A (en) * | 1926-05-03 | 1927-01-04 | J C Bayer Furnace Company Inc | Domestic sawdust burner |
US2458542A (en) * | 1944-11-16 | 1949-01-11 | Comb Processes Company | Low velocity oil and gas burner |
US3299841A (en) * | 1965-10-13 | 1967-01-24 | Babcock & Wilcox Co | Burner impeller |
US4422389A (en) * | 1981-07-01 | 1983-12-27 | Deutsche Babcock Aktiengesellschaft | Solid-fuel burner |
US4457241A (en) * | 1981-12-23 | 1984-07-03 | Riley Stoker Corporation | Method of burning pulverized coal |
US4474120A (en) * | 1981-02-27 | 1984-10-02 | Steag Ag | Method for at least the two-stage ignition of a fuel dust power burner and a burner system for carrying out this method |
US4531461A (en) * | 1982-05-14 | 1985-07-30 | T.A.S., Inc. | Solid fuel pulverizing and burning system and method and pulverizer and burner therefor |
US4538530A (en) * | 1979-12-31 | 1985-09-03 | Whitman John E | Burner for the suspension firing of comminuted material |
US4555994A (en) * | 1981-10-14 | 1985-12-03 | Rheinisch-Westfalisches Elektrizitatswerk Ag | Boiler-heating assembly with oil- and coal-fired ignition burners |
US4688496A (en) * | 1985-07-26 | 1987-08-25 | Enatech Corporation | Pulverized coal burner |
US4902223A (en) * | 1987-06-26 | 1990-02-20 | Young Philip J | Oxy-fuel burner for burning pulverized fuel |
US5651320A (en) * | 1993-07-30 | 1997-07-29 | Babcock Lentjes Kraftwerkstechnik Gmbh | Burner for burning powdered fuel |
US5878676A (en) * | 1996-02-29 | 1999-03-09 | L. & C. Steinmuller Gmbh | Burner and furnace operated with at least one burner |
US6116171A (en) * | 1994-11-14 | 2000-09-12 | Mitsubishi Jukogyo Kabushiki Kaisha | Pulverized coal combustion burner |
US6123542A (en) * | 1998-11-03 | 2000-09-26 | American Air Liquide | Self-cooled oxygen-fuel burner for use in high-temperature and high-particulate furnaces |
US6298796B1 (en) * | 1999-03-03 | 2001-10-09 | Hitachi, Ltd. | Fine coal powder combustion method for a fine coal powder combustion burner |
US6314896B1 (en) * | 1999-06-10 | 2001-11-13 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Method for operating a boiler using oxygen-enriched oxidants |
US6461145B1 (en) * | 1999-02-25 | 2002-10-08 | Stein Heurtey | Flat flame burners |
US20020144636A1 (en) * | 2000-08-04 | 2002-10-10 | Toshikazu Tsumura | Solid fuel burner and method of combustion using solid fuel burner |
US20040194681A1 (en) * | 2003-04-04 | 2004-10-07 | Taylor Curtis L. | Apparatus for burning pulverized solid fuels with oxygen |
US6862877B1 (en) * | 1999-04-06 | 2005-03-08 | James Engineering (Turbines) Limited | Gas turbines |
US7066728B2 (en) * | 2003-01-21 | 2006-06-27 | American Air Liquide, Inc. | Process and apparatus for oxygen enrichment in fuel conveying gases |
US20060225424A1 (en) * | 2005-04-12 | 2006-10-12 | Zilkha Biomass Energy Llc | Integrated Biomass Energy System |
US7163392B2 (en) * | 2003-09-05 | 2007-01-16 | Feese James J | Three stage low NOx burner and method |
US7430970B2 (en) * | 2005-06-30 | 2008-10-07 | Larue Albert D | Burner with center air jet |
US7553153B2 (en) * | 2005-01-05 | 2009-06-30 | Babcock - Hitachi K.K. | Burner and combustion method for solid fuels |
US20100077944A1 (en) * | 2008-09-26 | 2010-04-01 | Air Products And Chemicals, Inc. | Combustion system with precombustor |
US7717701B2 (en) * | 2006-10-24 | 2010-05-18 | Air Products And Chemicals, Inc. | Pulverized solid fuel burner |
US7770528B2 (en) * | 2003-11-10 | 2010-08-10 | Babcock- Hitachi K.K. | Solid fuel burner, solid fuel burner combustion method, combustion apparatus and combustion apparatus operation method |
US20100300063A1 (en) * | 2009-02-26 | 2010-12-02 | Palmer Labs, LLC. | Apparatus and Method for Combusting a Fuel at High Pressure and High Temperature, and Associated System and Device |
US20110173139A1 (en) * | 2010-01-11 | 2011-07-14 | Bert Zauderer | Slagging coal combustor for cementitious slag production, metal oxide reduction, shale gas and oil recovery, enviromental remediation, emission control and co2 sequestration |
US20110296748A1 (en) * | 2010-06-08 | 2011-12-08 | Kenneth Hillel Peter Harris | Methods for the manufacture of fuel pellets and other products from lignocellulosic biomass |
US8113824B2 (en) * | 2006-06-01 | 2012-02-14 | Babcock & Wilcox Power Generation Group, Inc. | Large diameter mid-zone air separation cone for expanding IRZ |
US8485813B2 (en) * | 2008-01-11 | 2013-07-16 | Hauck Manufacturing Company | Three stage low NOx burner system with controlled stage air separation |
US8505496B2 (en) * | 2007-05-18 | 2013-08-13 | Her Majesty The Queen In Right Of Canada As Represented By The Minister Of Natural Resources | Method for burning coal using oxygen in a recycled flue gas stream for carbon dioxide capture |
US8646394B2 (en) * | 2009-05-27 | 2014-02-11 | Ihi Corporation | Burner |
US8726819B2 (en) * | 2008-08-08 | 2014-05-20 | Ihi Corporation | Burner |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB308054A (en) * | 1928-02-21 | 1929-03-21 | Alfred Charles Prior | Improvements in agitators or mixing devices |
US3831535A (en) * | 1973-11-02 | 1974-08-27 | Mill Conversion Contractor Inc | Wood waste burner system |
US4147116A (en) * | 1977-09-19 | 1979-04-03 | Coal Tech Inc. | Pulverized coal burner for furnace and operating method |
US4206712A (en) * | 1978-06-29 | 1980-06-10 | Foster Wheeler Energy Corporation | Fuel-staging coal burner |
US4321034A (en) * | 1980-04-03 | 1982-03-23 | Clearfield Machine Company | Coal burners, rotary furnaces incorporating the same and methods of operating |
US4630554A (en) * | 1982-05-14 | 1986-12-23 | T.A.S., Inc. | Pulverized solid fuel burner and method of firing pulverized fuel |
US4671192A (en) * | 1984-06-29 | 1987-06-09 | Power Generating, Inc. | Pressurized cyclonic combustion method and burner for particulate solid fuels |
US4879959A (en) * | 1987-11-10 | 1989-11-14 | Donlee Technologies, Inc. | Swirl combustion apparatus |
JP4998001B2 (en) * | 2007-02-09 | 2012-08-15 | 株式会社Ihi | Pulverized coal burner |
-
2012
- 2012-12-10 US US13/709,939 patent/US20140157790A1/en not_active Abandoned
-
2013
- 2013-12-10 CA CA2894523A patent/CA2894523A1/en not_active Abandoned
- 2013-12-10 WO PCT/US2013/074115 patent/WO2014093336A1/en active Application Filing
- 2013-12-10 RU RU2015127774A patent/RU2015127774A/en not_active Application Discontinuation
- 2013-12-10 EP EP13862536.3A patent/EP2929244A4/en not_active Withdrawn
Patent Citations (40)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1613265A (en) * | 1926-05-03 | 1927-01-04 | J C Bayer Furnace Company Inc | Domestic sawdust burner |
US2458542A (en) * | 1944-11-16 | 1949-01-11 | Comb Processes Company | Low velocity oil and gas burner |
US3299841A (en) * | 1965-10-13 | 1967-01-24 | Babcock & Wilcox Co | Burner impeller |
US4538530A (en) * | 1979-12-31 | 1985-09-03 | Whitman John E | Burner for the suspension firing of comminuted material |
US4474120A (en) * | 1981-02-27 | 1984-10-02 | Steag Ag | Method for at least the two-stage ignition of a fuel dust power burner and a burner system for carrying out this method |
US4422389A (en) * | 1981-07-01 | 1983-12-27 | Deutsche Babcock Aktiengesellschaft | Solid-fuel burner |
US4555994A (en) * | 1981-10-14 | 1985-12-03 | Rheinisch-Westfalisches Elektrizitatswerk Ag | Boiler-heating assembly with oil- and coal-fired ignition burners |
US4457241A (en) * | 1981-12-23 | 1984-07-03 | Riley Stoker Corporation | Method of burning pulverized coal |
US4531461A (en) * | 1982-05-14 | 1985-07-30 | T.A.S., Inc. | Solid fuel pulverizing and burning system and method and pulverizer and burner therefor |
US4688496A (en) * | 1985-07-26 | 1987-08-25 | Enatech Corporation | Pulverized coal burner |
US4902223A (en) * | 1987-06-26 | 1990-02-20 | Young Philip J | Oxy-fuel burner for burning pulverized fuel |
US5651320A (en) * | 1993-07-30 | 1997-07-29 | Babcock Lentjes Kraftwerkstechnik Gmbh | Burner for burning powdered fuel |
US6116171A (en) * | 1994-11-14 | 2000-09-12 | Mitsubishi Jukogyo Kabushiki Kaisha | Pulverized coal combustion burner |
US5878676A (en) * | 1996-02-29 | 1999-03-09 | L. & C. Steinmuller Gmbh | Burner and furnace operated with at least one burner |
US6123542A (en) * | 1998-11-03 | 2000-09-26 | American Air Liquide | Self-cooled oxygen-fuel burner for use in high-temperature and high-particulate furnaces |
US6461145B1 (en) * | 1999-02-25 | 2002-10-08 | Stein Heurtey | Flat flame burners |
US6298796B1 (en) * | 1999-03-03 | 2001-10-09 | Hitachi, Ltd. | Fine coal powder combustion method for a fine coal powder combustion burner |
US6862877B1 (en) * | 1999-04-06 | 2005-03-08 | James Engineering (Turbines) Limited | Gas turbines |
US6314896B1 (en) * | 1999-06-10 | 2001-11-13 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Method for operating a boiler using oxygen-enriched oxidants |
US20020144636A1 (en) * | 2000-08-04 | 2002-10-10 | Toshikazu Tsumura | Solid fuel burner and method of combustion using solid fuel burner |
US6715432B2 (en) * | 2000-08-04 | 2004-04-06 | Babcock-Hitachi Kabushiki Kaisha | Solid fuel burner and method of combustion using solid fuel burner |
US7066728B2 (en) * | 2003-01-21 | 2006-06-27 | American Air Liquide, Inc. | Process and apparatus for oxygen enrichment in fuel conveying gases |
US20040194681A1 (en) * | 2003-04-04 | 2004-10-07 | Taylor Curtis L. | Apparatus for burning pulverized solid fuels with oxygen |
US7163392B2 (en) * | 2003-09-05 | 2007-01-16 | Feese James J | Three stage low NOx burner and method |
US7770528B2 (en) * | 2003-11-10 | 2010-08-10 | Babcock- Hitachi K.K. | Solid fuel burner, solid fuel burner combustion method, combustion apparatus and combustion apparatus operation method |
US7553153B2 (en) * | 2005-01-05 | 2009-06-30 | Babcock - Hitachi K.K. | Burner and combustion method for solid fuels |
US8240123B2 (en) * | 2005-04-12 | 2012-08-14 | Zilkha Biomass Power Llc | Integrated biomass energy system |
US20110120140A1 (en) * | 2005-04-12 | 2011-05-26 | Zilkha Biomass Power Llc | Integrated biomass energy system |
US20060225424A1 (en) * | 2005-04-12 | 2006-10-12 | Zilkha Biomass Energy Llc | Integrated Biomass Energy System |
US7430970B2 (en) * | 2005-06-30 | 2008-10-07 | Larue Albert D | Burner with center air jet |
US8113824B2 (en) * | 2006-06-01 | 2012-02-14 | Babcock & Wilcox Power Generation Group, Inc. | Large diameter mid-zone air separation cone for expanding IRZ |
US7717701B2 (en) * | 2006-10-24 | 2010-05-18 | Air Products And Chemicals, Inc. | Pulverized solid fuel burner |
US8505496B2 (en) * | 2007-05-18 | 2013-08-13 | Her Majesty The Queen In Right Of Canada As Represented By The Minister Of Natural Resources | Method for burning coal using oxygen in a recycled flue gas stream for carbon dioxide capture |
US8485813B2 (en) * | 2008-01-11 | 2013-07-16 | Hauck Manufacturing Company | Three stage low NOx burner system with controlled stage air separation |
US8726819B2 (en) * | 2008-08-08 | 2014-05-20 | Ihi Corporation | Burner |
US20100077944A1 (en) * | 2008-09-26 | 2010-04-01 | Air Products And Chemicals, Inc. | Combustion system with precombustor |
US20100300063A1 (en) * | 2009-02-26 | 2010-12-02 | Palmer Labs, LLC. | Apparatus and Method for Combusting a Fuel at High Pressure and High Temperature, and Associated System and Device |
US8646394B2 (en) * | 2009-05-27 | 2014-02-11 | Ihi Corporation | Burner |
US20110173139A1 (en) * | 2010-01-11 | 2011-07-14 | Bert Zauderer | Slagging coal combustor for cementitious slag production, metal oxide reduction, shale gas and oil recovery, enviromental remediation, emission control and co2 sequestration |
US20110296748A1 (en) * | 2010-06-08 | 2011-12-08 | Kenneth Hillel Peter Harris | Methods for the manufacture of fuel pellets and other products from lignocellulosic biomass |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104456630A (en) * | 2014-11-19 | 2015-03-25 | 西安交通大学 | Slagging-preventing gas turbine combustion chamber with biomass fuel utilized |
US20190271465A1 (en) * | 2016-07-26 | 2019-09-05 | Jfe Steel Corporation | Auxiliary burner for electric furnace |
US11041621B2 (en) * | 2016-07-26 | 2021-06-22 | Jfe Steel Corporation | Auxiliary burner for electric furnace |
US11578652B2 (en) | 2019-08-12 | 2023-02-14 | Enexor Energy, Llc | Combined heat and power system and method of operation |
Also Published As
Publication number | Publication date |
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EP2929244A1 (en) | 2015-10-14 |
WO2014093336A1 (en) | 2014-06-19 |
RU2015127774A (en) | 2017-01-16 |
EP2929244A4 (en) | 2016-11-02 |
CA2894523A1 (en) | 2014-06-19 |
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Legal Events
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AS | Assignment |
Owner name: ZILKHA BIOMASS POWER LLC, TEXAS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:FORSBERG, LARS BJORN;REEL/FRAME:029439/0174 Effective date: 20121117 |
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AS | Assignment |
Owner name: ZILKHA BIOMASS POWER I LLC, TEXAS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ZILKHA BIOMASS POWER LLC;REEL/FRAME:030594/0475 Effective date: 20130501 |
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STCB | Information on status: application discontinuation |
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