146results about "Staged combustion" patented technology

A method for combusting ammonia provided in a combustion feed (1) using a combustion arrangement (100) comprising a combustion section (110), a flue gas section (120), and a plurality of burners (111, 112) arranged in the combustion section (110) is provided, wherein the plurality of burners (111, 112) are operated using the combustion feed and oxygen delivered to the plurality of burners (111, 112), and wherein a flue gas (2) formed in the combustion section (110) is passed through the flue gas section (120). Further oxygen is delivered to the combustion section (110) via a plurality of gas injectors (114-117) arranged in the combustion section (110) separately from and in a distance to each of the plurality of burners (111, 112). A corresponding combustion arrangement (100) is also provided.

Device for drying material for an asphalt mixing plant, the device (2, 3) comprising a rotary kiln (9) which can be driven to rotate about a rotational axis (19) and in which the material is dried, the rotary kiln (9) having a material inlet (10) and a material outlet (11), b. a heating unit coupled to the rotary kiln (9) for supplying heat to the rotary kiln (9), the heating unit being designed with a burner (12) having i. a burner housing (27) having a longitudinal axis (26), ii. an air line (16) arranged on the burner housing (27) for supplying air, wherein the air line (16) is arranged axially to the longitudinal axis (26) on the burner housing (27), iii. an air blower (29) arranged in the air line (16, 28), iv. a burner head (41) arranged on the burner housing (27) for generating a burner flame (13), v. a hydrogen gas line (14) connected to the burner (12) for supplying hydrogen gas into the burner (12), wherein a hydrogen gas nozzle (31) for discharging the hydrogen gas is connected to the hydrogen gas line (14), characterized in that c. the burner (12) is designed to be operated either exclusively by means of hydrogen gas or by means of hydrogen gas and secondary fuel, d. the burner (12) has a swirling element (35) for swirling the air in the burner (12) relative to the longitudinal axis (26), e. the swirling element (35) comprises a flow guide element in the burner housing (27), wherein the flow guide element is arranged immovably in the burner housing (27), f. the flow guide element is arranged concentrically to the longitudinal axis (26) and is designed as a baffle plate having a plurality of blades (53, 54) arranged in a circle with respect to the longitudinal axis (26) and oriented at an inclination, g. the heating unit comprises a hot gas generator (24) connected to the burner (12) which is connected to the rotary kiln (9) by means of a hot gas line (25).

A heater includes a radiant section with a bottom wall and a side wall. A burner is provided on the bottom wall and a primary fuel stream and a primary combustion air stream are provided through the burner to support a primary combustion reaction local to the burner. The primary combustion air stream may be less than the air needed to burn all of the primary fuel stream, resulting in the primary combustion reaction being sub-stochiometric and reducing NOx formation. A remote air pipe injects remote air into the radiant section distal to the burner, and in some cases, spaced from the burner by at least two meters. The remote air addition supports a lean secondary combustion reaction that further minimizes NOx emissions concentration. The heater is suitable for use with high H2 fuel or preheated air, or both, to lower CO2 emissions while meeting NOx emission targets.

Described herein is an apparatus (10), system (300) and method for pyrolysing and combusting a material. One described embodiment provides an apparatus(10) comprising one or more crucibles (50, 51) for receiving a material to be pyrolysed and combusted therein and one or more heating tubes (100-210) disposed in proximity to the crucible(s) (50, 51). The or each heating tube (100-210) is configured for receiving byproduct(s) produced during pyrolysis and combustion of the material within the crucible(s) (50, 51) and pyrolising and combusting the byproduct(s) to produce flue gas from the byproduct(s). The flue gas produced within the heating tube(s) (100-210) are mixed with a hydroxy gas.

The present invention relates to particular combustors, and e.g., to a combustor comprising a central primary fuel lance, a pilot fuel conduit, a primary oxidant conduit, a secondary oxidant conduit, and optionally a secondary fuel conduit, which are arranged in a particular and advantageous manner so as to surround each other at least in their downstream sections. The invention also relates to a furnace comprising the burner and a method of operating the burner. The burner according to the invention provides, in particular, a particularly advantageous way that comprises a pilot burner as part of the main burner in order to ignite a liquid fuel flame in a cold furnace. If desired, the pilot flame may help extend the flammability limit or operating range of the liquid fuel burner.

The invention relates to a heating apparatus (1) having at least one reaction unit (2) for generating heat from a reaction gas mixture comprising hydrogen, gaseous hydrocarbon and / or oxygen, wherein the at least one reaction unit (2) has at least one first reaction portion (3) with at least one hydrogen catalyst (6) for the flameless combustion of the hydrogen. According to the invention, the at least one reaction unit (2) comprises at least one second reaction portion (4) for combusting the gaseous hydrocarbon and / or the heating apparatus (1) comprises at least one separating device (5) for separating the gaseous hydrocarbon and the hydrogen. The invention also relates to the use of a heating apparatus (1) and to a method for operating a heating apparatus (1).

This burner comprises: a first nozzle that has a cylindrical shape centered on a burner axis, and that has a main fuel outlet for ejecting a mixed fluid of main fuel and primary air; a flame stabilizing plate that has a truncated conical shape that expands diametrically toward the downstream side, is disposed at the peripheral edge of the main fuel outlet at the tip end of the first nozzle, and generates a flame stabilizing vortex downstream; a second nozzle that has a secondary air outlet surrounding the main fuel outlet, and that blows out secondary air from the secondary air outlet; and an auxiliary fuel nozzle that is disposed in a second flow passage through which the secondary air flows, between the first nozzle and the second nozzle, and that has an auxiliary fuel outlet for ejecting a gas fuel containing an N component along the outer surface of the flame stabilizing plate or the outer surface of the first nozzle. The flame stabilizing plate is disposed downstream of the auxiliary fuel outlet and has protrusions that are continuous in the circumferential direction on the outer surface of the flame stabilizing plate.

The invention relates to the technical field of boiler combustion and discloses a multi-stage pulverized coal burner which comprises an outer combustion cylinder, an inner combustion cylinder, an adjuster and a combustion stabilizer, the inner combustion cylinder is arranged in the outer combustion cylinder, a channel is formed between the outer combustion cylinder and the inner combustion cylinder, the adjuster is connected with the outer combustion cylinder and used for guiding in mixed airflow, and the combustion stabilizer is arranged in the outer combustion cylinder. The mixed airflow can be divided into first-stage airflow flowing through the inner combustion cylinder and second-stage airflow flowing through the channel, the adjuster is used for adjusting the flow of the first-stage airflow and the flow of the second-stage airflow, the flame stabilizer is connected with the inner combustion cylinder, the flame stabilizer is provided with a flame spraying opening, and the flame spraying opening is formed in the inner combustion cylinder and used for spraying out flames to ignite the first-stage airflow and the second-stage airflow step by step. The multi-stage pulverized coal burner provided by the embodiment of the invention can adapt to different coal types to realize rapid ignition and stable and sufficient combustion.

A method for providing automatic enhanced staged oxygen combustion in a glass furnace including providing two or more burner assemblies each positioned to provide a flame in the glass furnace. Each of the burner assemblies includes a burner body having a primary gas inlet in fluid communication with a gas source through a primary gas valve, and a staged injector sub-assembly having a secondary gas inlet in fluid communication with the gas source through a secondary gas valve. The primary gas valve and the secondary gas valve are automatically controlled to alternate the total gas flow between a first total gas flow condition with the secondary gas flow rate at a secondary gas flow rate maximum value and a second total gas flow condition with the secondary gas flow rate at a secondary gas flow rate minimum value to provide enhanced staged oxygen combustion.

The invention relates to a burner with a refractory burner body 1, 2, 3 for burning fluid or aerosolized, in particular gaseous, fuels. With the aim of reducing NOx emissions, the burner body has a gas nozzle 7, 9, 10, 11 and several air nozzles 4, 6, which are at least partially formed as integral features within the burner body and exit at a front face 16 of the burner body. The air nozzles are arranged symmetrically around the gas nozzle and diverge at an angle α to the gas nozzle. The invention also relates to a method for burning fluid or aerosolized, in particular gaseous, fuels with reduced NOx emissions.

A burner includes a porous support and a combustion tube along which is mounted the porous support. The combustion tube has one or more openings configured to pass fuel to the porous support. The combustion tube is formed by a plurality of tubular modules assembled together. The burner includes at least one distribution tube extending inside the combustion tube and configured to distribute fuel in a predetermined manner in the combustion tube.

To enable stable combustion and suppression of NOx emissions in a burner for burning ammonia.SOLUTION: A burner includes: a first nozzle having a cylindrical shape using a burner axis as a center and including a main fuel outlet for ejecting a fluid mixture comprising main fuel and primary air; a flame holding plate having a truncated conical shape of which diameter is expanded toward a downstream side, disposed at a peripheral edge of the main fuel outlet at a tip of the first nozzle and generating flame holding swirl on the downstream side; a second nozzle having a secondary air outlet surrounding the main fuel outlet and blowing out secondary air from the secondary air outlet; and an auxiliary fuel nozzle disposed in a second flow passage in which the secondary air flows between the first nozzle and the second nozzle and having an auxiliary fuel outlet for ejecting gaseous fuel containing an N constituent along an outer surface of the flame holding plate or an outer surface of the first nozzle. The flame holding plate is disposed downstream of the auxiliary fuel outlet and has a projection continuing in the circumferential direction on the outer surface of the flame holding plate.SELECTED DRAWING: Figure 3

Gas distribution component for a burner, comprising an oxidant inlet 102, for introducing an oxidant flow into the burner; an oxidant inlet channel 101, in fluid connection with the oxidant inlet 102; a diffusion / buffering chamber 401, providing a space for buffering and diffusion of the oxidant after the oxidant flows out of the oxidant inlet channel 101, and connected to oxidant delivery components 302, 303, 304, wherein multiple through-holes 305 are provided on a wall of the oxidant inlet channel 101 that is adjacent to the diffusion / buffering chamber 401, the gas distribution component being easy to operate, with no need to configure a complex valve structure, thereby greatly reducing manufacturing costs, and also achieving the effects of being convenient to use and maintain, reducing the pressure value requirement for an upstream gas source, and reducing the impact of gas source fluctuation on the combustion effect.

A method for combusting fuel in stages by feeding combustion air (28) into a burner tube (12). A first fuel quantity is fed to form a primary flame (24) in the burner tube. A second fuel quantity is fed downstream to form a main flame front (26). The main flame front (26) stabilizes downstream of the burner tube (12) and is spaced apart from the burner tube (12). The fuel feed is designed such that the primary flame (24) burns at a stoichiometric ratio greater than 1.5, in particular greater than 2.0.

A burner apparatus is disclosed. The burner apparatus comprising a tube having a proximal portion, a middle portion, and a distal portion, a fuel inlet port adapted to receive fuel inside the tube. The fuel inlet port splits into a first conduit and a second conduit, an air inlet port receives air inside the tube, at least one air swirler unit positioned at the middle portion of the tube, generates a swirling air flow and an axial air flow from the air received, a block having a plurality of staged fuel tips, receives fuel from the second conduit. The block discharges a primary flame by containing the fuel received from the first conduit and the swirling air flow, and provide for a secondary flame by directing the fuel received from the plurality of staged fuel tips into the primary flame downstream of the primary flame attachment point.

A burner nozzle and a method of operating the burner nozzle can include a main air / fuel port located centrally within the burner nozzle, and a group of staged gas fuel ports that surrounds the main air-fuel port and which can direct fuel to an established flame zone downstream from the burner nozzle. Furthermore, a trapped vortex chamber can be formed in a wall of the main air / fuel port and can communicate with a group of primary gas ports in a fuel circuit, such that the trapped vortex chamber facilitates flame stability with respect to a flame produced by the burner nozzle.

A combustion assembly and a combustion furnace, the combustion assembly comprising a block divided over its height h into a plurality of levels, each level containing a passage for injecting fuel and / or oxidant, each passage extending from an inlet face to an outlet face and terminating in an injection orifice in the outlet face of the block, the injection orifices of each level define a contact rectangle on the outlet face, and further comprising burners provided one per level, each burner having a fuel injector and an oxidant injector, each burner being mounted on a corresponding level of the block such that the fuel and oxidant injectors of the burner are inserted into the passages of the corresponding level, the passages of each level are oriented and spaced apart such that when flames are generated downstream of the exit face, flames generated by the burners are spaced apart from each other and do not converge, and in the level adjoining the lower end of the block, a contact rectangle defined on the exit face has a line segment perpendicular to the height h direction, the length x is at least twice the length y of a line segment parallel to the height h direction.

The invention relates to the technical field of thermal power plant boiler combustion and discloses a pulverized coal burner which comprises a first combustion cylinder, a flow guide pipe, a second combustion cylinder and a combustion stabilizer, the flow guide pipe is provided with an air inlet end and an air outlet end, and the air outlet end is communicated with the first combustion cylinder; the flow guide pipe is used for guiding in mixed airflow carrying pulverized coal and conveying the mixed airflow into the first combustion cylinder, the second combustion cylinder is arranged in the first combustion cylinder, an annular channel is formed between the second combustion cylinder and the first combustion cylinder, and the second combustion cylinder is used for dividing the mixed airflow into first-stage airflow flowing through the second combustion cylinder and second-stage airflow flowing through the annular channel. The combustion stabilizer is arranged on the flow guide pipe and provided with an air outlet part, the air outlet part is located in the flow guide pipe and faces the second combustion cylinder, and the air outlet part is used for spraying out flames and sequentially igniting the first-stage airflow and the second-stage airflow. The pulverized coal burner provided by the embodiment of the invention can ignite in batches and realize stable and sufficient combustion.

A combustion system includes a combustion chamber for generating energy. The system includes a first inlet for supplying an oxidant into the chamber and a second inlet for supplying a fuel into the chamber. The system also includes a third inlet in fluid communication with the first inlet for supplying oxygen into the chamber. The system further includes a fourth inlet for supplying hydrogen into the chamber. A circulation line is used to deliver a flue gas from the chamber to the first inlet.

Method of a burner head for the staged combustion of a fuel with the supply of combustion air (28) into a burner tube (12). A first quantity of fuel is supplied to form a primary flame (24) within the burner tube. A second quantity of fuel is supplied downstream to form a main flame front (26). The main flame front (26) stabilizes downstream of the burner tube (12) and at a distance from the burner tube (12). The fuel supplies are designed such that the primary flame (24) burns with a stoichiometry greater than 1.5, in particular greater than 2.0.

Embodiments of the present invention include high-temperature staged recirculating burners and radiant tube burner assemblies that provide high efficiency, low NOx and CO emissions, and uniform temperature characteristics. One such staged recirculating burner includes a combustion tube having inside and outside helical fins forming opposing spiral pathways for combustion gases and products of combustion, a combustion nozzle coupled to the combustion tube, a gas tube running axially into the combustion tube, and a staging gas nozzle coupled to the gas tube, where the staging gas nozzle includes radial exit holes into the combustion tube and an axial gas staging tube extending into the combustion nozzle to stage combustion.

A fire grate includes a fire grate body and a flame stabilizer. The fire grate body has a main gas channel formed therein. A main gas outlet is formed at a top of the fire grate body and in communication with the main gas channel, and a communication opening is formed at a side of the fire grate body and in communication with the main gas channel. The flame stabilizer is disposed outside the fire grate body and forms an auxiliary gas channel together with the fire grate body. The auxiliary gas channel is in communication with the communication opening. The flame stabilizer also has an auxiliary gas outlet formed at a top of the flame stabilizer and in communication with the auxiliary gas channel.

The invention relates to particular burners, and e.g. to a burner comprising a central main fuel lance, a pilot fuel conduit, a main oxidant conduit, an auxiliary oxidant conduit, and optionally a secondary fuel conduit, which are arranged in a particular and advantageous way to surround each other at least in their downstream sections. The invention further relates to furnaces including the burners and methods of operating the burners. Among others, the burners of the present invention allow a particularly advantageous way of including a pilot burner as an integral part of the main burner to ignite liquid fuel flame in a cold furnace. If required, the pilot flame can assist in extending the flammability limit or operating range of the liquid fuel burner.

The invention relates to the technical field of thermal power plant boiler combustion and discloses an adjustable pulverized coal burner which comprises an outer barrel, an air inlet pipe, an inner barrel assembly and a combustion stabilizer, the air inlet pipe is used for guiding in mixed airflow carrying pulverized coal and conveying the mixed airflow into the outer barrel, the inner barrel assembly is arranged in the outer barrel, and the combustion stabilizer is arranged in the inner barrel assembly. An annular channel is formed between the inner barrel assembly and the outer barrel, the inner barrel assembly is used for dividing mixed airflow into first-stage airflow flowing through the inner barrel assembly and second-stage airflow flowing through the annular channel, the combustion stabilizer is arranged on the air inlet pipe, and the working end of the combustion stabilizer is located in the air inlet pipe and faces the inner barrel assembly. The working end is used for spraying flames and sequentially igniting the first-stage airflow and the second-stage airflow, and at least one of the combustion stabilizer and the inner barrel assembly can move to adjust the relative distance between the combustion stabilizer and the inner barrel assembly so as to achieve flow adjustment of the first-stage airflow and the second-stage airflow. The adjustable pulverized coal burner provided by the embodiment of the invention can adapt to different coal types to realize rapid ignition and stable and sufficient combustion.

This burner comprises a porous support (6) and a combustion tube (2) along which the porous support (6) is mounted, the combustion tube (2) having one or more openings to let a fuel through to the porous support (6), characterized in that the combustion tube (2) is formed of a plurality of tubular modules (20) that are connected together and in that the burner (1) further comprises at least one distribution tube extending inside the combustion tube (2) to distribute the fuel in a predetermined manner in the combustion tube.

Embodiments of the present invention include high-temperature staged recirculating burners and radiant tube burner assemblies that provide high efficiency, low NOx and CO emissions, and uniform temperature characteristics. One such staged recirculating burner includes a combustion tube having inside and outside helical fins forming opposing spiral pathways for combustion gases and products of combustion, a combustion nozzle coupled to the combustion tube, a gas tube running axially into the combustion tube, and a staging gas nozzle coupled to the gas tube, where the staging gas nozzle includes radial exit holes into the combustion tube and an axial gas staging tube extending into the combustion nozzle to stage combustion.

A method for providing automatic enhanced staged oxygen combustion in a glass furnace including providing two or more burner assemblies each positioned to provide a flame in the glass furnace. Each of the burner assemblies includes a burner body having a primary gas inlet in fluid communication with a gas source through a primary gas valve, and a staged injector sub-assembly having a secondary gas inlet in fluid communication with the gas source through a secondary gas valve. The primary gas valve and the secondary gas valve are automatically controlled to alternate the total gas flow between a first total gas flow condition with the secondary gas flow rate at a secondary gas flow rate maximum value and a second total gas flow condition with the secondary gas flow rate at a secondary gas flow rate minimum value to provide enhanced staged oxygen combustion.