Class / Patent application number | Description | Number of patent applications / Date published |
431009000 | Whirling, recycling material, or reversing flow in an enclosed flame zone | 40 |
20080227039 | Premixing Burner Arrangement for Operating a Combustion Chamber in Addition to a Method for Operating a Combustion Chamber - A premixing burner is disclosed for operating a combustion chamber with a liquid and/or gaseous fuel, with a swirl generator for a combustion inflow air stream for forming a swirl flow, and with injection of fuel into the swirl flow. The swirl generator is adjacent to the combustion chamber indirectly via a mixing zone or directly, in each case via a burner outlet, a cross-sectional widening at the burner outlet being provided which, is discontinuous in the flow direction of the swirl flow and through which the swirl flow bursts open so as to form a backflow zone. A contour locally narrowing the flow cross section of the swirl generator or of the mixing zone in the flow direction can be provided upstream of the burner outlet. | 09-18-2008 |
20080261161 | Alternative Fuel Burner with Plural Injection Ports - A burner or furnace including a combustion chamber and two or more fuel injection ports. The fuel injection ports inject fuel at non-radial injection angles into the combustion chamber. Preferably, the injection ports feed fuel substantially tangentially to a cyclonic vortex in the burner or furnace during operation. Also preferably, the injection ports are angled downward 5 to 15 degrees from a plane perpendicular to an axis of the burner or furnace. | 10-23-2008 |
20080280238 | LOW SWIRL INJECTOR AND METHOD FOR LOW-NOX COMBUSTOR - A fuel injector and a combustor including a fuel injector that enables a combustor to burn a lean fuel/oxider gas mixture while providing low emissions of oxides of nitrogen (NO | 11-13-2008 |
20080280239 | Method and Device for Burning Hydrogen in a Premix Burner - A method and a device for combusting gaseous fuel which contains hydrogen or consists of hydrogen, includes a burner which provides a swirl generator ( | 11-13-2008 |
20080286706 | Heater and method of operation - A furnace, firing pattern and method of operating a heater that employs a combination of hearth burners and wall burners for the cracking of hydrocarbons is described. The firing pattern leads to improvements in the uniformity of the coil metal temperatures and vertical heat flux profiles over the firebox elevation. The hearth burners operate with a stoichiometric excess of air while the wall burners operate with less than the stoichiometric amount of air. | 11-20-2008 |
20080305445 | PROCESS FOR COMBUSTION OF HIGH VISCOSITY LOW HEATING VALUE LIQUID FUELS - The present invention is directed to a process for the clean and convenient combustion of high viscosity liquid fuels, such as glycerol, as well as an apparatus useful for carrying such processes. In certain embodiments, the invention provides a process for glycerol combustion comprising providing a combustion apparatus with a glycerol combustion chamber that facilitates reflective heating, pre-heating the glycerol combustion chamber, atomizing the reduced viscosity glycerol, and combining the atomized glycerol with air in the glycerol combustion chamber to thereby completely combust the glycerol. In one embodiment, such as when using a pressure-atomizing nozzle, the inventive method may further comprise treating the glycerol to reduce the glycerol viscosity. | 12-11-2008 |
20090117502 | Combustor and Method of Operating a Combustor - A combustor comprises in flow series a burner, a transition piece and a combustion chamber being of larger diameter than the transition piece, the combustion chamber being connected to the transition piece via a dome portion. In the dome portion are located air injection openings. A method of operating the combustor comprises the stop of introducing air from the dome portion by means of air jets. | 05-07-2009 |
20090123883 | Swirling-type furnace operating method and a swirling-type furnace - The invention relates to heat engineering and can be used for designing and reconstructing furnaces for industrial boilers. More advantageously the inventive furnace can be used for burning coarsely dispersed broken combustibles, coal and schist. The invective swirling-type furnace operating method consists in returning the controllable amount of a coal-ash mixture from an ash catcher located behind a combustion to the internal surface thereof. Said swirling-type furnace comprises a combustion chamber provided with a sloping bottom which is formed by slops of lower parts of the walls thereof, a bottom-blowing device arranged under the sloping bottom mouth and an inclined burner which is used for supplying a fuel-air mixture and is fixed to the combustion chamber wall. The furnace is provided with the ash catcher located behind the combustion chamber and a recirculation ash channel, whose one end communicates with the ash catcher and the other with the combustion chamber internal space. The output openings of the channel are positioned between the sloping bottom mouth and the fuel supply burner or/and in a secondary combustion area, provided with an additional burner which is used for supplying the coal-ash mixture from the ash channel to the combustion chamber and is arranged therein. The ash catcher is selected according to a condition of catching particles whose size is greater than 0.5 mm. The ash channel can be provided with fly ash transporting and sorbent supply means. | 05-14-2009 |
20090142716 | Combustion Apparatus - A combustion apparatus comprising: a device for mixing a fuel with an oxidant; a combustion chamber in which combustion of the fuel/oxidant mix takes place; a pre-chamber located between the device and the combustion chamber; and means for supplying a gas to the pre-chamber so as to form a film of gas on the interior surface of the pre-chamber so as to prevent a combustion flame from the combustion chamber attaching itself to this interior surface damaging the pre-chamber, the supply of gas to the pre-chamber being such that where the gas first reaches the interior surface of the pre-chamber it forms a substantially continuous film of gas over this interior surface. | 06-04-2009 |
20090239181 | COMBUSTOR - A combustor is proposed which is compact and eliminates generation of NOx and unburned combustible and is capable of stable combustion. | 09-24-2009 |
20090263753 | RADIANT TUBE WITH RECIRCULATION - A burner fires into a radiant tube to provide a downstream flow of combustion products within the radiant tube. Staged fuel is injected upstream into the radiant tube. A recirculation conduit inside the radiant tube receives the staged fuel along with combustion products that are inspirated into the recirculation conduit by the staged fuel. The recirculation conduit has an outlet for discharging a mixture of the inspirated combustion products and staged fuel into the downstream flow of combustion products. | 10-22-2009 |
20090286190 | METHOD AND APPARATUS FOR COMBUSTING FUEL EMPLOYING VORTEX STABILIZATION - The present method and apparatus for producing a supersonic jet stream introduce an oxidizer in such a manner as to create a vortex, which is then restricted. Fuel is introduced into a reduced pressure eye of the vortex, forming a stratified composite stream of gases with unmixed oxidizer surrounding an inner mixture of fuel and oxidizer. This stratified composite stream is passed down a tube that exhausts to a low pressure environment. The combined fuel and oxidizer in the stratified stream is ignited to provide a high-velocity stream of combustion products. The outer layer of unmixed oxidizer in the vortex shields the tube and reduces or eliminates the need for additional cooling. | 11-19-2009 |
20090297995 | Mechanical Acoustic Noise Generator System for Scramjet Engine - A noise generator system is provided with each noise generator being pivotally mounted to a mounting surface associated with the air intake of a turbineless jet engine. Each noise generator is positioned so as to convert a laminar or transitional air stream into a turbulent air stream such that a turbulent air-fuel mixture is realized in the combustion section of the engine to achieve more efficient operation. | 12-03-2009 |
20100183991 | Premixing burner and method for operating a premixing burner - A method for operating a premixing burner is provided. The premixing burner includes a premixing zone. An air mass flow and fuel may be injected into the premixing zone, and a potential hot gas backflow area may form. A fluid containing no fuel is injected downstream from the fuel injection into the premixing zone in order that a hot gas backflow area does not form. A premixing burner including a premixing zone is also provided. | 07-22-2010 |
20100190119 | INDUSTRIAL BURNER - An apparatus and process is provided for combining fuel and combustion air to produce a mixture. The mixture is burned in a combustion chamber to produce a flame. | 07-29-2010 |
20100203461 | COMBUSTION SYSTEMS AND PROCESSES FOR BURNING FOSSIL FUEL WITH REDUCED EMISSIONS - A combustion system includes a combustion zone comprising a burner for converting a fuel, under fuel rich conditions, to a flue gas; an intermediate staged air zone downstream from the combustion zone for supplying intermediate staged air to the flue gas and producing fuel lean conditions; a reburn zone downstream from the intermediate staged air zone for receiving the flue gas; and an inlet downstream from the combustion zone for supplying a mixture of air and a reduction reagent to the flue gas, wherein the reduction reagent is configured to reduce an amount of a pollutant species in the flue gas. | 08-12-2010 |
20100266970 | METHOD AND DEVICE FOR COMBUSTING HYDROGEN IN A PREMIX BURNER - A device for combusting fuel which contains or consists of hydrogen, is described, with a burner provided with a swirl generator and also a feeder for feeding fuel and a feeder for feeding combustion air into the swirl generator. A first feeder, for feeding liquid fuel along a burner axis, and a second feeder for feeding liquid fuel or gaseous fuel along air inlet slots which are tangentially delimited by the swirl generator, with a transition section connected downstream to the swirl generator, and with a mixer tube connected downstream to the transition section and with a changeable flow cross-sectional transition leads into a combustion chamber are provided. Along the transition section, a third feeder for feeding fuel which contains or consists of hydrogen, and also a fourth feeder for the selective feed of fuel which contains or consists of hydrogen, or of the gaseous fuel are also provided. | 10-21-2010 |
20100273117 | PREMIX BURNER FOR A GAS TURBINE - A premix burner is provided, with a swirl generator and a downstream mixer tube for combusting gaseous and liquid fuel which during entry of combustion air is introduced into the burner interior space of the swirl generator and/or is introduced into the burner interior of the swirl generator on a burner axis, and also with a fuel lance which is arranged on the burner axis. The premix burner, in the transition section from the swirl generator to the mixer tube, includes at least one additional feed for introducing gaseous and/or liquid premix fuel from the wall region into the burner interior space of the mixer tube. | 10-28-2010 |
20110033806 | Fuel Staging in a Burner - A method for a staging operation at start up of a burner for a gas turbine engine combustor is provided. The method will stabilize the combustion of a lean-rich partially premised low emission burner for a gas turbine combustor at all engine load conditions. The method includes, adding fuel mixed with air to the pilot combustor, igniting the mixture utilizing an igniter provided at an upstream end of the pilot combustor for initiating a lean flame inside the pilot combustor and for providing the flow of the radicals and heat, imparting a swirl of fuel and air at the outside at the exit of the pilot combustor at the upstream end of the combustion room for creating and sustaining the main lean flame and gradually adding a swirl of air and fuel for establishing a full load stage to at least one channel. | 02-10-2011 |
20110059408 | METHOD AND BURNER ARRANGEMENT FOR THE PRODUCTION OF HOT GAS, AND USE OF SAID METHOD - A method for producing hot gas for operating a turbomachine fired with at least one combustion chamber includes premixing a fuel with a plurality of operating gases by introducing fuel into the plurality of operating gases in a mixing chamber disposed upstream of the combustion chamber using a burner arrangement, wherein the fuel includes at least one of a combustible gas and a H | 03-10-2011 |
20110104623 | Process and a Reactor for Oxidation of a Hydrocarbon - A process and related reactor ( | 05-05-2011 |
20110136066 | Bio-fuel furnace - This bio-fuel furnace includes a combustion unit and separate fuel feed unit mounted atop the combustion unit. The combustion unit includes a cylindrical burn pot, a preheat module, an expansion bowl and a primary heat exchanger supported by an inner frame and enclosed by an outer casing. The preheat module is a rectangular box having an internal spiral baffle. The burn pot is seated within a central opening in the preheat module. The expansion bowl is seated atop the preheat module and the primary heat exchanger is mounted above the expansion bowl. An inlet fan blows inlet air through the preheat module and into the burn pot and an outlet fan draws exhaust air around the primary heat exchanger from the combustion unit. The fuel feed unit has an internal storage bin and a rotating scoop arm deposits the bio fuel into the combustion unit. The rotation of the scoop arm meters the bio-fuel into the combustion unit, which falls vertically directly into the burn pot though a center passage in the primary heat exchanger and the expansion bowl. | 06-09-2011 |
20110143291 | FLUE GAS RECIRCULATION METHOD AND SYSTEM FOR COMBUSTION SYSTEMS - A method and system for improving high excess air combustion system efficiency, including induration furnaces, using a re-routing of flue gas within the system by gas recirculation. Flue gas is drawn from hot system zones including zones near the stack, for re-introduction into the process whereby the heat recovery partially replaces fuel input. At least one pre-combustion drying zone, at least one combustion zone, and at least a first cooling zone exist in these furnaces. At least one exhaust gas outlet is provided to each pre-combustion drying and combustion zone. At least part of the gaseous flow from each system zone exhaust outlet is selectively delivered to an overall system exhaust, the remaining flow being selectively delivered via recirculation to cooling zones. Recirculation flow is adjusted to meet required system temperatures and pressures. The method and system provide efficiency improvements, reducing fuel requirements and greenhouse gas emissions. | 06-16-2011 |
20120015309 | METHOD FOR A COMBUSTOR NOZZLE - A method for supplying fuel to a combustor includes flowing a working fluid through a nozzle, injecting the fuel into the nozzle, and mixing the fuel with the working fluid to create a fuel and working fluid mixture. The method further includes swirling the fuel and working fluid mixture, sensing flame holding in the nozzle, and reducing the swirl in the fuel and working fluid mixture. A method for supplying a working fluid to a combustor includes flowing the working fluid through a nozzle and swirling the working fluid flowing through the nozzle. The method further includes sensing flame holding in the nozzle and reducing the swirl of the working fluid flowing through the nozzle. | 01-19-2012 |
20120058437 | APPARATUS AND METHOD FOR MIXING FUEL IN A GAS TURBINE NOZZLE - A nozzle includes a fuel plenum and an air plenum downstream of the fuel plenum. Fuel channels radially outward of an axial centerline of the nozzle include an inlet and an outlet downstream of the inlet. A fuel port in the fuel channels provides fluid communication between the fuel plenum and the fuel channels. An air port in the fuel channels downstream of the fuel port provides fluid communication between the air plenum and the fuel channels. A method for mixing fuel and air in a nozzle prior to combustion includes flowing fuel to a fuel plenum and flowing air to an air plenum downstream of the fuel plenum. The method further includes injecting fuel from the fuel plenum through fuel ports in fuel channels and injecting air from the air plenum through air ports in the fuel channels. | 03-08-2012 |
20120094239 | COMBUSTOR AND A FUEL SUPPLY METHOD FOR THE COMBUSTOR - A combustor includes a chamber mixing and burning fuel and air and an air hole plate disposed on a wall surface of the chamber. The air hole plate includes a plurality of rows disposed concentrically of a plurality of air holes jetting coaxial jets of fuel and air into the chamber. A first fuel nozzle and a second fuel nozzle are disposed near a fuel hole for jetting fuel into an air hole row on an inner peripheral side. The first fuel nozzle is structured to suppress turbulence of surrounding air flow and the second fuel nozzle is structured to promote turbulence of a surrounding air flow. In accordance with the aspect of the present invention, good flame stability can be maintained while further reducing NOx in a combustor using coaxial jets. | 04-19-2012 |
20120129111 | PREMIX FOR NON-GASEOUS FUEL DELIVERY - A method of combusting non-gaseous fuel to heat a load in a process chamber includes the steps of injecting reactant streams into a combustion chamber. The combustion chamber does not contain a load to be heated, but communicates with the process chamber through a burner port. A first reactant stream includes the non-gaseous fuel, and is injected into the combustion chamber to cause the non-gaseous fuel to volatilize in the combustion chamber. A second reactant stream, which includes a premix of gaseous fuel and primary oxidant, also is injected into the combustion chamber. The first and second reactant streams then combust together to yield products of combustion that flow through the burner port from the combustion chamber to the process chamber. Importantly, the second reactant stream is injected into the combustion chamber adjacent to the first reactant stream. This causes the second reactant stream to adjoin the first reactant stream at the onset of volatilization of the non-gaseous fuel, which is found to inhibit the production of NOx. | 05-24-2012 |
20120148963 | Induced-Draft Low Swirl Burner for Low NOx Emissions - A burner for use with an induced draft furnace and which satisfies reduced nitrous oxide (NO | 06-14-2012 |
20120189965 | BURNER - A burner includes a first fuel feed and a first oxidant feed surrounding the first fuel feed in the shape of a ring. The burner includes a second fuel feed arranged about the first oxidant feed in the shape of a ring, and a second oxidant feed arranged about the second fuel feed in the shape of a ring. In addition, a plurality of oxygen lances are provided, which have a smaller radial distance from the burner centre than the second fuel feed. | 07-26-2012 |
20120270161 | COANDA GAS BURNER APPARATUS AND METHODS - A gas burner apparatus for discharging a mixture of fuel gas, air and flue gas into a furnace space of a furnace is provided. The burner tile includes at least one gas circulation port extending though the wall of the tile. The interior surface of the wall of the tile includes a Coanda surface. Fuel gas and/or flue gas conducted through the gas circulation port follows the path of the Coanda surface which allows more flue gas to be introduced into the stream. The exterior surface of the wall of the tile also includes a Coanda surface for facilitating the creation of a staged combustion zone. Also provided are improved burner tiles, improved gas tips and methods of burning a mixture of air, fuel gas and flue gas in a furnace space. | 10-25-2012 |
20120282558 | COMBUSTOR NOZZLE AND METHOD FOR SUPPLYING FUEL TO A COMBUSTOR - A combustor nozzle includes a fuel supply in fluid communication with a fuel passage that terminates at a fuel outlet. An oxidant supply is in fluid communication with an oxidant passage radially displaced from the fuel passage and that terminates at an oxidant outlet radially displaced from the fuel outlet. A diluent passage radially displaced from the fuel passage and the oxidant passage terminates at a diluent outlet disposed between the fuel outlet and the oxidant outlet. A method for supplying fuel to a combustor includes flowing the fuel through a fuel outlet and flowing an oxidant through an oxidant outlet radially displaced from the fuel outlet. The method further includes flowing a diluent through a diluent outlet radially disposed between the fuel outlet and the oxidant outlet. | 11-08-2012 |
20130089823 | COMBUSTOR - A combustor includes a combustion chamber and at least one group of at least two burner jets disposed circumferentially about the combustor. The at least two burner jets within a group are generally coplanar and are spaced about equal distances circumferentially. Each of the at least two burner jets within a group is oriented to direct a flow of a fluid at a corresponding tangential point of an associated imaginary circle within the combustion chamber to induce a generally cyclonic flow pattern within the combustion chamber. | 04-11-2013 |
20130095437 | Oxy-Fuel Furnace and Method of Heating Material in an Oxy-Fuel Furnace - An oxy-fuel furnace and method of heating material in an oxy-fuel furnace are disclosed. The method includes combusting oxygen and fuel with an oxy-fuel burner arrangement in the oxy-fuel furnace forming combustion gases, and maintaining a vortex including the combustion gases within a central region of an enclosure of the oxy-fuel furnace. The oxy-fuel burner arrangement includes a plurality of high momentum oxy-fuel burners arranged at an angle to generate the vortex, the angle being greater than 15 degrees but less than 75 degrees with respect to a furnace wall boundary of the enclosure, an angular velocity of greater than 0.07 radians per second, or a combination thereof. The furnace includes an oxy-fuel burner arrangement including at least two high momentum oxy-fuel burners having high shape factor nozzle geometries, and an enclosure. The vortex increases convective heating within the enclosure and uniformity of heating within the enclosure. | 04-18-2013 |
20130157205 | Mixer/Flow Distributors - The invention relates mixer/flow distributors and their use, e.g., in regenerative reactors. The invention encompasses a process and apparatus for controlling oxidation, e.g., for thermally regenerating a reactor, such as a regenerative, reverse-flow reactor. | 06-20-2013 |
20130177858 | COMBUSTOR AND METHOD FOR DISTRIBUTING FUEL IN THE COMBUSTOR - A combustor includes a plurality of tubes arranged in a tube bundle and supported by at least one plate that extends radially within the combustor, wherein each tube includes an upstream end axially separated from a downstream end and provides fluid communication through the tube bundle. A flow conditioner extends upstream from the upstream end of one or more of the plurality of tubes, and a radial passage extends through the flow conditioner. A method for distributing fuel in a combustor including flowing a working fluid through a flow conditioner that extends from a tube that is configured in a tube bundle comprising a plurality of tubes and that is supported by at least one plate. The flow conditioner includes at least one radial passage to impart radial swirl to the working fluid. Flowing a fuel through an annular insert that is at least partially surrounded by the flow conditioner. | 07-11-2013 |
20140004469 | Low NOx Combustion Process and Burner Therefor | 01-02-2014 |
20140308619 | LEAN PREMIX BURNER HAVING CENTER GAS NOZZLE - A lean premix burner has a center fire nozzle, which includes radial gas outlets and a ring of outlets. The gas outlets from the center fire nozzle are fed from a manifold. The center fire gas is controlled separately from the main gas supply, which has several advantages, including enhanced turn down capability. | 10-16-2014 |
20150050605 | LOW NOx BURNER - A low NOx burner has a housing that includes a burner head defining a gas manifold and a primary flame zone downstream of the burner head. The burner has a gas inlet for receiving gas. Flow-through air vents are disposed around a center of the burner head and extending through the burner head thereby enabling cold core air to flow from an annular core space upstream of the burner head to the primary flame zone downstream of the burner head. The burner also includes a plurality of premix air vents in fluid communication with the manifold for premixing air and gas within the manifold and for emitting premixed air and gas into the primary flame zone. A plurality of staging pipes extend from the manifold into the primary flame zone for conveying gas into the primary flame zone. The burner includes an ignition device extending into the primary flame zone. | 02-19-2015 |
20150354811 | NON-SYMMETRICAL LOW NOx BURNER APPARATUS AND METHOD - A burner apparatus for a furnace system and a method of burner operation wherein a non-symmetrical positioning of one combustion fuel discharge tip or a grouping of fuel discharge tips within the burner wall produces side-by-side lean and fuel rich combustion stage zones and also produces internal flue gas recirculation. | 12-10-2015 |
20160102857 | SWIRL JET BURNER - A burner includes a combustor having a generally cylindrical, hollow shape extending along a centerline, and a closed end. A fuel tube that is connectable to a fuel supply has at least one opening fluidly connecting an interior of the combustor with the fuel source such that fuel can be delivered from the fuel source into the interior of the combustor. At least one air inlet disposed to provide an air stream into the interior of the combustor. The air stream is arranged and configured to create a vortex flow structure within the combustor. | 04-14-2016 |