Duct With Air Whirling Means Surrounds Disperser Patents (Class 431/182)
  • Patent number: 5127821
    Abstract: In a premixing burner, which consists of two hollow partial conical bodies (1, 2), which are positioned on one another and have a cone inclination increasing in the direction of flow, the fuel feed takes place via central fuel nozzle (3) and/or via a plurality of fuel nozzles (17), which are placed along the inflow of the combustion air (15) into the interior (14) of the burner. The combustion air (15) itself is a mixture of fresh air and exhaust gas. The fresh air is led up via a first flow funnel (23a, 23b ) and exhaust gas recirculation takes place via a second flow funnel (22a, 22b). These two gases mix with one another before flowing tangentially into the interior (14). An optimum, homogenous fuel concentration over the cross-section arises in the region of the return flow zone (6).
    Type: Grant
    Filed: April 19, 1990
    Date of Patent: July 7, 1992
    Assignee: Asea Brown Boveri Ltd.
    Inventor: Jakob Keller
  • Patent number: 5118283
    Abstract: In a combustion installation, a mixture of fresh air (D) and exhaust gas (C) is fed to the burner (A) via a mixing/conveying device (EFG). There is provided in the combustion installation a heat exchanger (M), which undertakes the thermal conditioning of the mixture (H) before the latter is fed into the burner (A).
    Type: Grant
    Filed: April 25, 1990
    Date of Patent: June 2, 1992
    Assignee: Asea Brown Boveri Ltd.
    Inventor: Thomas Sattelmayer
  • Patent number: 5088917
    Abstract: A gas burner comprises an annular air delivery duct axis, connected to an air supply for delivering a rotating air stream to a combustion chamber. A device injects fuel gas into said combustion chamber along the axis of said annular delivery duct. An arc is formed in the combustion chamber between an upstream electrode along the axis of the annular delivery duct and a counter electrode placed downstream of the upstream electrode. The upstream electrode and counter electrode are connected to an electrical current source. A deflector plate is placed in the path of the air stream at a location close to the upstream electrode. An arc ignition voltage across said upstream electrode and said deflector may be applied.
    Type: Grant
    Filed: June 1, 1990
    Date of Patent: February 18, 1992
    Assignee: Electricite De France
    Inventors: Serge Leleu, Jean-Luc Aschard, Alain Bouvier
  • Patent number: 5087194
    Abstract: There is disclosed a blower-type burner for use with heating boilers which is effective for reducing NO.sub.x pollutants produced by flue gases. The device is mountable about an opening in a closure or sealing panel of a furnace body and provides for containment of the flue gas path within the burner. A separated dual impeller system provides for complete separation of the flue gas path from a combustion intake system.
    Type: Grant
    Filed: August 22, 1990
    Date of Patent: February 11, 1992
    Inventor: Hans Viessmann
  • Patent number: 5044935
    Abstract: In a firing plant which is operated with fossil fuels, the exhaust gases (A) from the combustion space (22) are cooled in a heat exchanger (X). A part of these cooled exhaust gases (A') are mixed with fresh air (L) and are conducted by means of a fan (D) in the direction of the burner (Z). This exhaust gas/fresh air mixture forms the combustion air (15) for the burner (Z). Before the introduction of this combustion air (15) into the burner (Z), it is again heated in the heat exchanger (X'). The combustion air (15) preheated in this way ensures complete evaporation of a liquid fuel (12) and acts against the high flame temperature peaks in the combustion space (22) immediately after the burner (Z), which are responsible for the formation of NO.sub.x. The burner (Z) can be operated with liquid and/or gaseous fuel.
    Type: Grant
    Filed: March 12, 1990
    Date of Patent: September 3, 1991
    Assignee: Asea Brown Boveri Ltd.
    Inventor: Hans Peter
  • Patent number: 5000679
    Abstract: A burner for directly flaming steel making materials to accomplish reduction without oxidation, wherein the burner comprises a plurality of combusion air outlets spaced circumferentially of the inner wall of a tubular burner tile, and fuel gas outlets disposed centrally of the burner tile, and wherein the combustion air outlets and fuel gas outlets are formed and disposed with specified jetting angles and distances to produce burning without oxidation.
    Type: Grant
    Filed: February 27, 1989
    Date of Patent: March 19, 1991
    Assignee: Nippon Kokan Kabushiki Kaisha
    Inventors: Shuzo Fukuda, Masahiro Abe, Shiro Fukunaka, Michio Nakayama, Koichiro Arima, Shunichi Sugiyama, Koji Matsui
  • Patent number: 4993939
    Abstract: A burner for directly flaming steel making materials to accomplish reduction without oxidation, wherein the burner comprises a plurality of combustion air outlets spaced circumferentially of the inner wall of a tubular burner tile, and fuel gas outlets disposed centrally of the burner tile, and wherein the combustion air outlets and fuel gas outlets are formed and disposed with specified jetting angles and distances to produce buring without oxidation.
    Type: Grant
    Filed: February 27, 1989
    Date of Patent: February 19, 1991
    Assignee: Nippon Kokan Kabushiki Kaisha
    Inventors: Shuzo Fukuda, Masahiro Abe, Shiro Fukunaka, Michio Nakayama, Koichiro Arima, Shunichi Sugiyama, Koji Matsui
  • Patent number: 4979894
    Abstract: A burner for burning gaseous and/or liquid fuels in a combustion space (5), through the face (3) of which an oil lance (12) and/or several gas lances (13 and 14) extend. The oil lance and at least some of the gas lances are surrounded by an air pipe (4) that supplies primary air with its outer surface demarcating a flue-gas recirculation channel that opens toward the combustion space and surrounded by a source of secondary air. The air pipe and the source of secondary air extend into the combustion space. The air pipe is surrounded inside the combustion space by a baffle (20) that is axially separated from the face of the combustion space. Some of the gas lances surround the air pipe and are mounted on a sector with a diameter that is shorter than the longest diameter of the baffle.
    Type: Grant
    Filed: June 29, 1989
    Date of Patent: December 25, 1990
    Assignee: Deutsche Babcock Werke Aktiengesellschaft
    Inventor: Rolf Oppenberg
  • Patent number: 4975045
    Abstract: A burner register assembly is provided for controlling a supply of secondary air to a furnace having a fuel and primary air supply and a secondary air supply. The burner register assembly includes a body and a pair of air valves in the body for communication with the secondary air supply to control the admission of secondary air to the register assembly. Each air valve communicates with a scroll section in the burner register body, which scroll section has a scroll passageway which spirals inwardly in the direction of secondary air flow to provide a controlled flow pattern of secondary air into the furnace. The air valve is disposed upstream of the scroll section with which it communicates and thus is well removed from the extreme environment of the opening or throat to the furnace. The burner register assembly also includes a shadow vane assembly positioned proximate to the outlet of the register, i.e., proximate to the furnace throat, to provide protection form radiant heat from the furnance.
    Type: Grant
    Filed: April 23, 1986
    Date of Patent: December 4, 1990
    Assignee: Eagleair, Inc.
    Inventors: George K. Green, Landy Chung
  • Patent number: 4971552
    Abstract: A burner for directly flaming steel making materials to accomplish reduction without oxidation, wherein the burner comprises a plurality of combustion air outlets spaced circumferentially of the inner wall of a tubular burner tile, and fuel gas outlets disposed centrally of the burner tile, and wherein the combustion air outlets and fuel gas outlets are formed and disposed with specified jetting angles and distances to produce burning without oxidation.
    Type: Grant
    Filed: February 27, 1989
    Date of Patent: November 20, 1990
    Assignee: Nippon Kokan Kabushiki Kaisha
    Inventors: Shuzo Fukuda, Masahiro Abe, Shiro Fukunaka, Michio Nakayama, Koichiro Arima, Shunichi Sugiyama, Koji Matsui
  • Patent number: 4971553
    Abstract: A burner for directly flaming steel making materials to accomplish reduction without oxidation, wherein the burner comprises a plurality of combustion air outlets spaced circumferentially of the inner wall of a tubular burner tile, and fuel gas outlets disposed centrally of the burner tile, and wherein the combustion air outlets and fuel gas outlets are formed and disposed with specified jetting angles and distances to produce burning without oxidation.
    Type: Grant
    Filed: February 27, 1989
    Date of Patent: November 20, 1990
    Assignee: Nippon Kokan Kabushiki Kaisha
    Inventors: Shuzo Fukuda, Masahiro Abe, Shiro Fukunaka, Michio Nakayama, Koichiro Arima, Shunichi Sugiyama, Koji Matsui
  • Patent number: 4971551
    Abstract: A burner for directly flaming steel making materials to accomplish reduction without oxidation, wherein the burner comprises a plurality of combustion air outlets spaced circumferentially of the inner wall of a tubular burner tile, and fuel gas outlets disposed centrally of the burner tile, and wherein the combustion air outlets and fuel gas outlets are formed and disposed with specified jetting angles and distances to produce burning without oxidation.
    Type: Grant
    Filed: February 27, 1989
    Date of Patent: November 20, 1990
    Assignee: Nippon Kokan Kabushiki Kaisha
    Inventors: Shuzo Fukuda, Masahiro Abe, Shiro Fukunaka, Michio Nakayama, Koichiro Arima, Shunichi Sugiyama, Koji Matsui
  • Patent number: 4969815
    Abstract: A burner for directly flaming steel making materials to accomplish reduction without oxidation, wherein the burner comprises a plurality of combustion air outlets spaced circumferentially of the inner wall of a tubular burner tile, and fuel gas outlets disposed centrally of the burner tile, and wherein the combustion air outlets and fuel gas outlets are formed and disposed with specified jetting angles and distances to produce burning without oxidation.
    Type: Grant
    Filed: February 27, 1989
    Date of Patent: November 13, 1990
    Assignee: Nippon Kokan Kabushiki Kaisha
    Inventors: Shuzo Fukuda, Masahiro Abe, Shiro Fukunaka, Michio Nakayama, Koichiro Arima, Shunichi Sugiyama, Koji Matsui
  • Patent number: 4943230
    Abstract: High flame stability and good starting qualities are obtained in a relatively smoke free hot gas generator including a housing 10 having an interior combustion chamber 12 with a diverging interior wall 20 that is generally a surface of revolution. An axially directed opening 18 is centered in the wall 20 and an outer, oxidant inlet 48, 52 is provided and includes swirler vanes 50 for introducing into the chamber 12 at the interior wall 20 a swirling, hollow body of oxidant such that centrifugal force will create a diverging hollow body of swirling oxidant on the interior wall 20. A central fuel inlet 52, 58 is located within the opening 18 and within the oxidant inlet 48, 52 and is generally concentric therewith.
    Type: Grant
    Filed: October 11, 1988
    Date of Patent: July 24, 1990
    Assignee: Sundstrand Corporation
    Inventor: Jack R. Shekleton
  • Patent number: 4913646
    Abstract: In a combustion device for burning a liquid atomized fuel with an oxygen containing gas and in which ejectors using oxygen as driving gas are sucking admixed exhaust gases into a space adjacent to a fuel supply nozzle, the inventive feature is to provide guide vanes of spiral shape in the space adjacent to the fuel supply.
    Type: Grant
    Filed: April 24, 1989
    Date of Patent: April 3, 1990
    Assignee: Kockums Marine AB
    Inventor: Tommy Backheim
  • Patent number: 4902221
    Abstract: A burner assembly (10) for the combustion of pulverized coal in furnaces (12) and the like. The assembly comprises wind box means (23) for providing a primary source of air to the interior (13) of the furnace; feeding means (30) for delivering pulverized coal through a wall (11) of the furnace and into the interior thereof; means for supplying (31) a secondary flow of air through the feeding means and into the furnace separate from the primary flow of air; and swirler means (32) having a plurality of blades around the feeding means so that the first flow moves around and through the blades for imparting a rotation to the primary flow of air to penetrate the pulverized coal funnel. A method for supplying pulverized coal to furnaces and the like through burner assemblies is also provided and results in increased combustion efficiency.
    Type: Grant
    Filed: May 12, 1987
    Date of Patent: February 20, 1990
    Assignee: Control Systems Company
    Inventors: Raymond L. Collins, Jr., Stephen A. Bryk
  • Patent number: 4883422
    Abstract: The nozzle comprises an axial chamber (23) provided in a first part (21) and into which the fuel gas is fed, and a chamber (24) which surrounds the chamber (23) and into which air is fed; the two chambers (23) and (24) are separated from the combustion chamber (4) by a front plate (5) in which three series of apertures are provided, namely a series of peripheral apertures (31) arranged to pass secondary air with a velocity having an axial and tangential component, a second series of apertures (32) disposed on a more inner circumference and arranged to pass primary air and also having an axial and possibly also tangential component, and a third series of more central apertures arranged to pass gas; by virtue of said apertures the burner thermal output is adjustable to the extent of enabling it to be varied within a very wide range of values.
    Type: Grant
    Filed: April 5, 1989
    Date of Patent: November 28, 1989
    Assignee: T.T.C. Termo Tecnica Ceramica S.P.A.
    Inventor: Eugen D. Cristea
  • Patent number: 4846666
    Abstract: The invention relates to a method and a burner in which a proportion of the fuel is delivered via an outer annular duct and accelerated at the outlet end to a high speed, while a further proportion of the fuel is delivered via a second, inner annular duct and retarded at the outlet end to a slow speed. This results in stabilization and regulation of the principal flame by a permanent pilot flame.
    Type: Grant
    Filed: April 27, 1988
    Date of Patent: July 11, 1989
    Assignee: Krupp Polysius AG
    Inventors: Hans Bilawa, Eberhard Neumann
  • Patent number: 4801261
    Abstract: An air register apparatus, method, and arrangement is disclosed in which each air register includes two portions, one of which feeds combustion air to an inner, ignition zone where fuel is first ignited, the other of which feeds combustion air to an outer, supplemental zone where the main combustion takes place. These two register portions provide separate and discrete air streams having measurable characteristics which accurately reflect the characteristics of the overall flow through each register portion and which characteristics govern combustion characteristics in the associated zone. Each air stream passes through an inwardly spiralling scroll passageway having a simple upstream air valve at the entrance to the passageway for controlling the flow of air through the passageway. This upstream air valve is remote from the hostile environment of the furnace or other combustion device.
    Type: Grant
    Filed: March 19, 1987
    Date of Patent: January 31, 1989
    Assignee: Eagleair, Inc.
    Inventor: Donald K. Hagar
  • Patent number: 4741279
    Abstract: A method of combusting a coal-water mixture fuel. The mixture is atomized into a conically-shaped primary pre-combustion chamber. Primary air is supplied, at a rate smaller than that required for complete burning of the mixture and in the form of a swirl about the axis of the jet of the atomized mixture, from the peripheral portion of the primary pre-combustion chamber into a secondary pre-combustion chamber connected to said primary pre-combustion chamber, thus forming a region of low pressure around the jet of the mixture. The region of low pressure serves to induce the atmosphere gas from the secondary pre-combustion chamber of higher temperature back into the primary pre-combustion chamber of a lower temperature, so that the water content of the mixture is evaporated and the mixture is ignited by the heat of the hot atmosphere gas.
    Type: Grant
    Filed: January 7, 1987
    Date of Patent: May 3, 1988
    Assignees: Hitachi, Ltd., Babcock-Hitachi Kabushiki Kaisha
    Inventors: Shigeru Azuhata, Kazutoshi Higashiyama, Kiyoshi Narato, Hironobu Kobayashi, Norio Arashi, Tooru Inada, Kenichi Sohma, Keizou Ohtsuka, Yoshitaka Takahashi, Fumio Koda, Tadahisa Masai, Masakiyo Tanikawa, Kei Kawano
  • Patent number: 4734028
    Abstract: An adapter to permit an oil burner head to burn pulverized coal alone or in combination with other fuels features a manifold in the form of a mirrored pair of scrolls forming a part of the burner head. The interiors of the scrolls are divided into separate coal and air passages which open into the primary air passage of the burner head through outlets uniformly circularly disposed thereabout.
    Type: Grant
    Filed: September 22, 1986
    Date of Patent: March 29, 1988
    Assignee: Cedarapids, Inc.
    Inventor: Joseph E. Musil
  • Patent number: 4728284
    Abstract: The improved adjustable combustion rate air/fuel proportioned burner of the present invention includes an air chamber housing with a plurality of air exit holes therein, a fuel gas tube disposed within the air chamber housing having a wall which is generally coextensive with the wall of the air chamber housing and having gaseous fuel openings therein, and a rotatable face plate covering a portion of such coextensive wall and having openings therein substantially corresponding in shape, size and location to the air exit openings and gaseous fuel openings in such coextensive wall. The improved adjustable combustion rate air/fuel proportioned burner of the present invention functions by means of rotation of the rotatable face plate to expose a selected and variable cross-sectional area of the air exit openings and gaseous fuel openings simultaneously to maintain a pre-selected ratio of air to fuel gas for the burning thereof.
    Type: Grant
    Filed: February 12, 1987
    Date of Patent: March 1, 1988
    Assignee: Maxon Corporation
    Inventor: William P. Coppin
  • Patent number: 4726761
    Abstract: A burner especially adapted for use with pulverized fuel slurries, such as pulverized coal-water slurries. The burner has an atomizing nozzle which disperses the slurry in the form of multiple, diverging spray cones issuing from a corresponding number of atomizing orifices. Each orifice is formed by a central atomizing air flow. The slurry is brought into contact with the air flow and is atomized thereby. Before the atomized air flow is discharged, it is enveloped by a rotating auxiliary air flow and constricted to generate a venturi effect which facilitates the formation of the diverging, cone-shaped discharge pattern. A combustion air spinner surrounds the nozzle and is constructed of multiple vanes which have circularly arcuate shapes and a length, in the direction of the air flow, which is least proximate the nozzle and greatest at the periphery of the vanes. This assures an even combustion air flow rate over the entire radial extent of the spinner.
    Type: Grant
    Filed: January 29, 1987
    Date of Patent: February 23, 1988
    Assignee: Coen Company, Inc.
    Inventors: Chester S. Binasik, Londerville, Steve B.
  • Patent number: 4708638
    Abstract: The flame temperature of a fluid fuel fired burner (10) is reduced by mixing flue gas (35) with the combustion air supply (34) before introduction of the fuel and combustion take place. The NOX produced by the process of combustion is thereby reduced. The flue gas (35) may also be induced from the furnace remote from the flame zone of the burner (10) such that the flame is not disturbed. A venturi (21) may be used to induce the flue gas (35) from the furnace.
    Type: Grant
    Filed: February 21, 1986
    Date of Patent: November 24, 1987
    Assignee: Tauranca Limited
    Inventors: John F. Brazier, Alan H. Young, John E. Viney, Gordon W. Sutton
  • Patent number: 4685882
    Abstract: A burner especially adapted for use with pulverized fuel slurries, such as pulverized coal-water slurries. The burner has an atomizing nozzle which disperses the slurry in the form of multiple, diverging spray cones issuing from a corresponding number of atomizing orifices. Each orifice is formed by a central atomizing air flow. The slurry is brought into contact with the air flow and is atomized thereby. Before the atomized air flow is discharged, it is enveloped by a rotating auxiliary air flow and constricted to generate a venturi effect which facilitates the formation of the diverging, cone-shaped discharge pattern. A combustion air spinner surrounds the nozzle and is constructed of multiple vanes which have circularly arcuate shapes and a length, in the direction of the air flow, which is least proximate the nozzle and greatest at the periphery of the vanes. This assures an even combustion air flow rate over the entire radial extent of the spinner.
    Type: Grant
    Filed: September 9, 1985
    Date of Patent: August 11, 1987
    Assignee: Coen Company, Inc.
    Inventors: Chester S. Binasik, Steve B. Londerville
  • Patent number: 4629416
    Abstract: A burner assembly includes a register having a circular front wall and an annular side wall; a plurality of cylindrical bluff body elements circumferentially spaced about the annular side wall in a plurality of axially spaced rows for supplying air to the register; fuel supply assemblies which supply at least one of coal, gas and oil to the register for mixing with the air; and a plurality of bluff body discs, each positioned within a respective bluff body element for increasing the velocity and pressure drop of the air entering the register so as to enhance mixing of the fuel and the air within the register, and to reduce the NOx.
    Type: Grant
    Filed: June 11, 1985
    Date of Patent: December 16, 1986
    Assignee: Voorheis Industries, Inc.
    Inventor: James T. Voorheis
  • Patent number: 4623521
    Abstract: Vanes operatively attached to external sleeves are provided in a conduit to implement on the outside of the conduit change in the swirl angle of incoming fluids.
    Type: Grant
    Filed: September 30, 1985
    Date of Patent: November 18, 1986
    Assignee: Phillips Petroleum Company
    Inventors: Mark L. Gravley, Mark E. Kertok
  • Patent number: 4610625
    Abstract: A gas burner formed of an elongated combustion chamber having a fire wall at one end, an ignition tube extending through an opening in the fire wall, a conductive member within the ignition tube providing means for generating ignition sparks adjacent the end of the tube within the combustion chamber, a plurality of axially directed jet members positioned in the openings in the fire wall and extending into the combustion chamber, a mixing chamber rearwardly of the fire wall having separate fuel and air mixture inlets, a tubular partition within the mixing chamber, air being received on the outside of the tubular partition and gas on the inside and a plurality of secondary air jets extending through openings in the fire wall, each of the secondary discharge jets being configured to discharge air into the combustion chamber in directions tangent to the direction of discharge of the axial jet members so that a column of moving secondary air surrounds the flame of combustion within the combustion chamber.
    Type: Grant
    Filed: September 23, 1985
    Date of Patent: September 9, 1986
    Inventor: Richard L. Bunn
  • Patent number: 4607487
    Abstract: A gas turbine combustion including a combustion wall having a plurality of generally cylindrical passages therein which extend around and are generally parallel to, the chamber axis, each of said passages having a series of air inlets disposed along the passage and tangentially directed thereinto, generally towards the center of the chamber, and means for directing cooling air into the series of air inlets in each passage to set up a forced vortex therein. The series of air inlets may be arranged to set up forced vortices of opposite rotation in adjacent passage. A means for directing cooling air into the tube inlets may comprise an annular shroud which extends around the air inlets and directs airflow into the air inlets.
    Type: Grant
    Filed: December 26, 1984
    Date of Patent: August 26, 1986
    Assignee: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
    Inventor: John R. Tilston
  • Patent number: 4602571
    Abstract: A burner (10) is provided for supplying coal-liquid slurry and combustion air to a furnace (2). The burner housing (12) is mounted about the burner throat opening (6) and interconnected to a combustion air supply duct (8). A coal slurry gun (14) is disposed coaxially within the housing for spraying the coal-liquid slurry into the furnace. A first conduit means (20) is disposed coaxially about the coal slurry gun to define a primary air flow passage (22) surrounding the slurry gun. Additionally, a second conduit means (30) is disposed coaxially about the first conduit means (20) to define a secondary air flow passage (32) between the first and second conduit means and a tertiary air flow passage (34) between the second conduit means and the burner throat (4). Independently controllable dampers 41, 42 and 43 are provided in the air inlets to the primary, secondary and tertiary air flow passages to permit independent control of air flow velocity.
    Type: Grant
    Filed: July 30, 1984
    Date of Patent: July 29, 1986
    Assignee: Combustion Engineering, Inc.
    Inventor: Roman Chadshay
  • Patent number: 4588375
    Abstract: An oil burner of the type comprising a burner housing having several nozzles (16, 17) adapted to introduce pressurized oil (18, 20) and through which housing combustion air (39) is blown for being mixed with the finely distributed oil drops ejected from the nozzles, and in which the burner nozzles (16, 17) are mounted substantially symmetrically with respect to the longitudinal axis (26) of the burner and are mounted angularly to each other, preferably at an angle of 6.degree.-10.degree. and so that the center axis (27, 28) of the oil jets cross each other at or in-front of the outlet (23) of a flame cup (13) of the burner.
    Type: Grant
    Filed: April 30, 1984
    Date of Patent: May 13, 1986
    Inventor: Christer Sandstrom
  • Patent number: 4551090
    Abstract: A burner for combustion of nitrogen-containing fuels. The burner includes a core-air tube with centrally arranged oil atomizing lance, a dust tube surrounding the core-air tube, a mantle-air tube which surrounds the dust tube and is provided with an axially shiftable twist-blade ring arranged at the air inlet, as well as a burner opening which expands conically toward the combustion chamber. The core-air tube and the mantle-air tube are supplied from a main air conduit. Air jets or nozzles are provided in a concentric arrangement around the burner opening. These air nozzles are connected with the main air passage by conduits, and the air stream discharging from the air nozzles is regulated by a flap.
    Type: Grant
    Filed: December 19, 1983
    Date of Patent: November 5, 1985
    Assignee: L. & C. Steinmuller GmbH
    Inventors: Klaus Leikert, Gerhard Buttner, Sigfrid Michelfelder
  • Patent number: 4523530
    Abstract: A powdery coal burner is disclosed, which comprises a burner nozzle having an opening at the end of the burner body, through which a combustion-assisting gaseous medium is injected into a combustion area, means of providing a swirling motion to said combustion-assisting gaseous medium which is injected through said burner nozzle to said combustion area in a swirled state, an injection nozzle having an opening surrounding said burner nozzle opening, through which coal is injected toward said combustion area, and a primary air outlet nozzle having an opening surrounding said opening of said injection nozzle for the powdery coal, through which a primary combustion air is forwardly injected.
    Type: Grant
    Filed: February 22, 1983
    Date of Patent: June 18, 1985
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventors: Motofumi Kaminaka, Hiroyuki Takashima, Katsuhiko Kaburagi
  • Patent number: 4507075
    Abstract: A combustion device, especially for slow-to-react pulverized coal or coal dust.
    Type: Grant
    Filed: February 13, 1984
    Date of Patent: March 26, 1985
    Assignee: Gewerkschaft Sophia-Jacoba
    Inventors: Dietrich Buss, Klaus Brucher, Wilhelm Wenz
  • Patent number: 4505667
    Abstract: The invention relates to a method and device for the combustion of corrosive products, such as chlorine containing residues, comprising a combustion chamber, a dispersing head having an axial inlet for the phase to be burnt, and means for introducing two separate fractions of the combustive phase, and a plate for connecting the dispersing head to the combustion chamber.
    Type: Grant
    Filed: June 28, 1982
    Date of Patent: March 19, 1985
    Assignee: Atochem
    Inventors: Georges Frusta, Francois Prudhon
  • Patent number: 4504216
    Abstract: Disclosed is a burner register assembly having an air register assembly for imparting a controlled vortex swirl to secondary combustion air of a furnace in order to entrain the fuel and primary air of the furnace and carry them into the furnace interior. The assembly may comprise a series of arcuate vanes circumferentially spaced about the fuel and primary air nozzle, the vanes being designed to induce both turbulence and a well defined vortex to the secondary air flow. A separate air valve, such as a butterfly valve, is provided upstream of the air register assembly to regulate the volume of secondary air flow. Shadow vanes may also be provided in the vicinity of the air register assembly outlet, and positioned adjacent the furnace walls in order to protect the air register assembly from furnace heat, particularly when the burner associated with the air register assembly is idle and the secondary air flow is lowered.
    Type: Grant
    Filed: September 15, 1982
    Date of Patent: March 12, 1985
    Assignee: Eagleair, Inc.
    Inventors: Donald K. Hagar, Lyle D. Geiger
  • Patent number: 4488869
    Abstract: A staged, high efficiency burner for gaseous, liquid or pulverized solid fuels (including fuels having a high nitrogen content) in which NOX emissions are minimized. The burner includes a burner basket having a base including a throat and a concentric, tubular, frustroconically shaped wall that defines a primary combustion space. The fuel and primary air of about 75% of stoichiometric air are introduced into the basket which has a length so that the fuel has a residence time therein of between about 0.1 to 0.5 second. Secondary air is introduced into the flame downstream of the basket in the form of a multiplicity of individual air streams which are oriented to penetrate the flame and spin it about its axis so as to maintain a substantially cylindrical flame periphery.
    Type: Grant
    Filed: July 6, 1982
    Date of Patent: December 18, 1984
    Assignee: Coen Company, Inc.
    Inventor: Temple S. Voorheis
  • Patent number: 4479775
    Abstract: An improved burner for attaining an improved combustion of a fuel-air mixe includes a plurality of vanes extending generally longitudinally of and disposed about an axis of the flow of the air-fuel mixture, each of the vanes having a first and a second end joined by first and second longitudinal edges. The first ends being contiguously arranged to extend along the circumference of a circle coaxial with the axis, the first edges defining a cylindrical surface coaxial with the main axis, and the second edges defining a conical surface coaxial with the axis. The vanes being interconnected at their first ends. The vane structure being confined in a cylindrical structure defining at the one end an annular opening through which compressed air is introduced, with a fuel nozzle being provided at the center of the same end. The nozzle being located at the end of the vane structure where the vanes substantially meet at the center of the structure.
    Type: Grant
    Filed: September 15, 1982
    Date of Patent: October 30, 1984
    Assignee: Sivan Development and Implementation of Technological Systems Ltd.
    Inventor: Yitzhak Wiesel
  • Patent number: 4475885
    Abstract: An adjustable flame burner for an industrial furnace comprises a burner body having a baffle with a discharge face forming a forward wall thereof. A first set of space combustion sustaining gas apertures extend axially through the baffle and a second set of apertures also extend axially through the baffle but at an acute angle to the first apertures and also offset from the burner center line in skewed relationship thereto. The apertures of the respective sets intersect at the discharge face and the relative amount of combustion sustaining gas is controlled between the two sets of apertures to provide a tunable, flame release pattern varying between a short cylindrical flame and a long intense all radial flame.
    Type: Grant
    Filed: July 28, 1983
    Date of Patent: October 9, 1984
    Assignee: Bloom Engineering Company, Inc.
    Inventor: Harry P. Finke
  • Patent number: 4470798
    Abstract: This relates to a method of operating a burner under conditions of stoichiometric combustion, wherein liquid fuel and combustion air are combined in a essentially constant ratio within a mixing and atomizing chamber, whereby a negative pressure is produced within said chamber owing to the guiding and metering of the air, said negative pressure serving to draw in fuel into said chamber. Furthermore, the invention relates to a burner assembly for carrying out the method.
    Type: Grant
    Filed: March 15, 1982
    Date of Patent: September 11, 1984
    Inventors: Johannes W. Graat, Hans T. Remie, A. M. Verhagen
  • Patent number: 4457241
    Abstract: A method of burning pulverized coal and other fuels comprises the steps of containing a primary flowing stream of coal/air mixture received adjacent an inlet end of a tubular nozzle for discharge at an outlet end into a combustion zone of a furnace for burning. The stream is accelerated in a convergent venturi section upstream of the outlet to distribute and concentrate the coal particles toward a central portion of the venturi in a minimum area throat, followed by decelerating the flow downstream of the venturi throat in a convergent flow section while forming a shallow, annular, conically shaped flow pattern around a hollow spreader cone mounted in the convergent section.
    Type: Grant
    Filed: February 23, 1983
    Date of Patent: July 3, 1984
    Assignee: Riley Stoker Corporation
    Inventors: Daniel C. Itse, Craig A. Penterson
  • Patent number: 4428727
    Abstract: A burner for introducing a suspension of solid fuel particles into a combustion chamber which includes a tubular conduit arranged to receive the suspension therethrough, and flow diverting means positioned at the discharge end of the conduit, and subdividing the cross section of the discharge end into a plurality of discharge openings. The burner may include a centrally disposed conduit which is coaxial with and surrounded by the tubular conduit, and an outer conduit surrounding the tubular conduit and coaxial therewith. The flow diverting means can be positioned at various positions between the respective conduits, to create a turbulent suspension of particles in the primary air stream, creating an aspirating effect for drawing secondary air into the burner along with the turbulent suspension of solid fuel particles.
    Type: Grant
    Filed: July 20, 1981
    Date of Patent: January 31, 1984
    Assignee: Klockner-Humboldt-Deutz AG
    Inventors: Herbert Deussner, Horst Herchenbach, Hubert Ramesohl, Wolfgang Breidenstein
  • Patent number: 4427367
    Abstract: A spray type combustion device comprises a fuel injection nozzle disposed inside an inner cylinder which is surrounded with an outer cylinder to form therebetween an annular air space, the inner cylinder being formed with an air introduction opening through which air is introduced to the inside of the inner cylinder, and a restrictor plate formed with a central opening and positioned to be close to the tip of the fuel injection nozzle so as to form therebetween a clearance for restricting air flow therethrough, thereby preventing the nozzle opening of the fuel injection nozzle from being clogged with carbon particles due to fuel incomplete combustion.
    Type: Grant
    Filed: May 7, 1981
    Date of Patent: January 24, 1984
    Assignee: Nissan Motor Co., Ltd.
    Inventor: Kenzi Yagisawa
  • Patent number: 4389188
    Abstract: A burner head with a central tubular chamber through which air flows has an annular chamber around the tubular chamber. Gas flows forward through the annular chamber. The end wall of the annular chamber is an annulus having five openings therethrough. Five tubular nozzles extend forward and radially inward from these five openings to direct the flow of gas toward the ignition electrode and the combustion zone within the tubular chamber. Three of the nozzles are relatively close to one another along a short arc at the upper portion of the annulus. Two of the nozzles are positioned about 120.degree. from one another along the lower portion of the arc of the annulus.
    Type: Grant
    Filed: November 12, 1980
    Date of Patent: June 21, 1983
    Assignee: ABC Sunray Corporation
    Inventor: Bola R. Kamath
  • Patent number: 4373900
    Abstract: A burner for pulverized coal such as in a rotary kiln includes three concentric cylindrical ducts. The outer duct carries an air supply which is directed in a generally axial direction into the kiln. The next innermost duct carries the pulverized coal-carrier gas mixture and is also generally directed in an axial direction. The next innermost duct carries air which is directed in a divergent radial direction in the kiln and includes a rotational air component. By controlling the quantities of air in the ducts which flank the coal duct, the resulting flame form can be controlled in the kiln without restoring to variations in the velocity or direction of the coal carrier gas stream. By eliminating such variations in regard to the coal carrier gas stream, the abrasive action of the pulverized coal is kept to a minimum.
    Type: Grant
    Filed: November 23, 1979
    Date of Patent: February 15, 1983
    Assignee: Pillard, Inc.
    Inventor: Gunther Eckelmann
  • Patent number: 4373896
    Abstract: A burner having a burner body in which combustion air is injected in an air flow pattern which establishes a relatively stagnant air region positioned within the flow of combustion air. A pilot flame injector is positioned to generate a pilot flame extending into the stagnant air region. The pilot flame can, thus, be maintained during the operation of the burner because the stable air conditions within the stagnant air region minimize disruption of the pilot flame by the flow of combustion air.A method for maintaining a uniform pilot flame within a burner operating over a range of combustion air flow rates by introducing combustion air into the burner and providing the combustion air with a flow configuration that establishes a stagnant air zone within the burner that is relatively independent of the flow rate of the combustion air. The pilot flame is then positioned within the stagnant air zone.An injector for feeding finely divided fuel to a burner.
    Type: Grant
    Filed: April 3, 1981
    Date of Patent: February 15, 1983
    Inventors: Eugene B. Zwick, Dung D. Nguyen, William D. Brigham, Kenneth Hoffman
  • Patent number: 4353688
    Abstract: A hot blast stove for use with high capacity blast furnaces incorporates a gas flow baffle particularly configured for improving mixture of combustion air and gas within the combustion chamber to enhance fuel burning characteristics with a concomitant reduction in pressure-pulsation experienced within the system and without an appreciable reduction in fuel firing rate.
    Type: Grant
    Filed: March 12, 1981
    Date of Patent: October 12, 1982
    Assignee: United States Steel Corporation
    Inventors: Walter D. Ahner, James B. Malosh
  • Patent number: 4336016
    Abstract: A high velocity gas burner has a housing divided by a partition into an air plenum and a combustion zone. Air is introduced into the plenum with a swirl. A ring of gas jets penetrate the partition through clearance holes. Each jet has a collar tending to impede air flow through the respective hole and the partition is axially displaceable relative to the collars. The partition is preferably cup-shaped with a skirt extending along the housing into the combustion zone so that secondary or excess air can bypass the combustion proper and cool the combustion products to the desired usable temperature.
    Type: Grant
    Filed: January 24, 1980
    Date of Patent: June 22, 1982
    Assignee: World Stress (Gas Contracts) Limited
    Inventor: John Badrock
  • Patent number: 4326702
    Abstract: A sprinkler burner and method for injecting solid particulate material and a gas into a reactor as a paraboloidal suspension. Means are provided to introduce the gas tangentially into an outer cylindroidal member, comprising a slot-like gas inlet in the cylindroidal member and a spiral shaped conduit communicating with the slot, such that the gas is directed around the periphery and downward between the outer cylindroidal member and an inner tubular member through which the solids are fed. The gas entrains the solids emitting from the inner tubular member and spreads the solids tangentially from the exhaust end of the outer cylindroidal member such that a paraboloidal suspension is formed within a reactor.
    Type: Grant
    Filed: October 22, 1979
    Date of Patent: April 27, 1982
    Inventors: Paul E. Oueneau, Horst J. Richter, Reinhardt Schuhmann, Jr.
  • Patent number: H19
    Abstract: A fuel injection system and method provide for shaping a combustion plume within a combustion chamber to effectively recirculate hot combustion gases for stable combustion conditions while providing symmetrical combustion conditions. Char and molten slag are passed to the outer boundary layer to complete combustion of char while permitting initial substoichiometric combustion in a reductive atmosphere for reducing discharge of nitrogen oxides. Shaping of the plume is accomplished by an axially adjustable pintle which permits apportionment of driving pressure between elements which contribute tangential and those which contribute radial directional components to oxidant flow entering the combustion chamber.
    Type: Grant
    Filed: December 21, 1983
    Date of Patent: February 4, 1986
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventor: Larry W. Carlson