Air Chamber With Inlet Control Surrounds Disperser At Wall Patents (Class 431/188)
  • Patent number: 5302115
    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: December 14, 1992
    Date of Patent: April 12, 1994
    Assignee: Damper Design, Inc.
    Inventors: Donald K. Hagar, Lyle D. Geiger
  • Patent number: 5259755
    Abstract: A burning method promotes rapid mixing and a stable flame in a burner to reduce NO.sub.x and CO emissions and to provide a smoother, quieter operation. The burner includes a primary fuel supply, a combustion air supply arranged to supply combustion air at low pressure, and a swirler for swirling the combustion air. When the primary fuel supply is gaseous fuel, the gaseous fuel is introduced radially into the swirling combustion air. A bluff body cone is arranged near the exit of the burner so as to be encountered by at least the swirling combustion air. An atomizer is arranged within the bluff body cone for atomizing liquid fuel when the primary fuel supply is a liquid fuel. Boost gas nozzles are arranged toroidily at the exit of the burner to supply and mix swirling boost gas for combustion with the combustion air when the gaseous fuel is the primary fuel supply, and mixer tabs are disposed around the periphery of the exit.
    Type: Grant
    Filed: July 31, 1992
    Date of Patent: November 9, 1993
    Assignee: Hauck Manufacturing Company
    Inventors: Bruce C. Irwin, Edward E. Moore, Raymond F. Baum
  • Patent number: 5211705
    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: October 31, 1990
    Date of Patent: May 18, 1993
    Assignee: Damper Design, Inc.
    Inventor: Donald K. Hagar
  • Patent number: 5207570
    Abstract: A burner assembly includes a register including an annular wall defining a chamber, the annular wall including a plurality of coaxial annular bands and a plurality of parallel, axially spaced, circumferentially extending slots which separate the bands and through which air is supplied to the chamber, the annular bands forming a plurality of bluff body elements to the air, the annular bands being formed separate and independent of each other; a plurality of spacer washers inserted between adjacent annular bands to define the slots; a plurality of connecting rods extending through openings in the spacing washers for maintaining the spacing washers in a predetermined relationship and for maintaining the spacing washers between the annular bands; an oil and/or gas gun for supplying a combustible material to the chamber; and a gas pilot for igniting a mixture of the combustible material and the air in the chamber.
    Type: Grant
    Filed: February 26, 1992
    Date of Patent: May 4, 1993
    Assignee: Voorheis Industries, Inc.
    Inventor: James T. Voorheis
  • Patent number: 5154598
    Abstract: A gaseous fuel burner has a gas supply (21) feeding a burner head (10) mounted in a refractory block or tile (12) via a venturi (16). Primary combustion air is inspirated to mix with the fuel gas before passing through the venturi and is controlled by a controller (20). A further pipe branch (24) takes fuel gas directly to a further discharge means such as a series of poker nozzles (25) which inject pure gas directly into the combustion zone.
    Type: Grant
    Filed: August 23, 1991
    Date of Patent: October 13, 1992
    Assignee: Airoil-Flaregas Limited
    Inventors: Alan W. Gooderham, Stephen Warren
  • Patent number: 5092760
    Abstract: An oxygen-fuel burner is disclosed wherein the atomizing fluid not only atomizes a liquid fuel, but also functions to cool the burner tip and prevent eddying of the atomized fuel from collecting on the burner tip, which could create undesirable high temperatures upon ignition. Further, oxygen may be utilized as an atomizing fluid in view of the fact that the atomization of the fuel is accomplished so close to the discharge end of the burner and the discharge velocity is maintained at such a high level, that the contact time of the oxy-fuel within the burner is extremely short, thereby precluding preignition within the burner. Further, the oxygen itself also functions to cool the burner tip and prevent preignition or cracking of the liquid fuel in the atomizing chamber. The burner may be utilized with carbon dioxide as an atomizing fluid wherein the burner temperature is thus lowered reducing the amount of NO.sub.
    Type: Grant
    Filed: August 1, 1990
    Date of Patent: March 3, 1992
    Assignees: Maxon Corporation, Corning Incorporated
    Inventors: John T. Brown, William P. Coppin
  • Patent number: 5044327
    Abstract: An air/burner port assembly for a boiler having a water-wall and a windbox spaced rearwardly of the water-wall to form a windbox, comprises a burner and ignitor mounted in the windbox for directing and igniting fuel through a port in the water-wall. A damper door is mounted on linkages which are actuated by a piston and cylinder combination, for opening and closing the port. The burner comprises an atomizer which is mounted within a fixed sleeve for movement outwardly of the port when the damper is open, and inwardly of the port for allowing the damper to close.
    Type: Grant
    Filed: September 14, 1990
    Date of Patent: September 3, 1991
    Assignee: The Babcock & Wilcox Company
    Inventor: Jeffrey D. Hunt
  • Patent number: 5011400
    Abstract: A burner assembly in which an inlet is located at one end of an annular passage for receiving fuel, and an outlet is located at the other end of the passage for discharging the fuel. A register assembly is provided which includes an enclosure for receiving air and a divider for directing the air from the enclosure towards the outlet in two parallel paths extending around the burner. Registers are disposed in each of the paths for regulating the quantity of air flowing through the paths and an injector is provided in the outer path for injecting sulfur adsorbent into the secondary air stream.
    Type: Grant
    Filed: December 29, 1986
    Date of Patent: April 30, 1991
    Assignee: Foster Wheeler Energy Corporation
    Inventor: Joel Vatsky
  • Patent number: 4998877
    Abstract: A blower burner is provided for a boiler heated with fluid fuels with a blower casing, which incorporates on one side the blower with the attached drive motor and where the fire tube of the burner comes out on the other side. The motor and the fire tube form protruding parts on opposite sides of the blower housing. The rear side of the fire tube protrudes beyond the side of the casing disposed toward the drive motor and the rear side of the fire tube protrudes into a cover extension attachment of the blower casing. The burner is provided with a pressure controller, where the air pressure inside of the fire tube element is measured by the input sensor signal and where the blower speed is the variable controlled by the pressure controller. Furthermore, a sound absorbing means is provided for the blower burner.
    Type: Grant
    Filed: June 24, 1986
    Date of Patent: March 12, 1991
    Assignee: Joh. Vaillant GmbH und Co.
    Inventors: Jurgen Schilling, Horst Reichmann, Wolfgang Henche, Thomas Pieper, Bernd Braun, Hans Ludowisy
  • Patent number: 4988286
    Abstract: The smokeless ignitor of the present invention prevents visible emissions upon cold or hot start-up of coal-fired or oil-fired utility boilers. The smokeless ignitor satisfies flame stability and combustion requirements by establishing a flame with 15-30% mass recirculation rate, a recirculation zone length of 0.75-1.5 effective throat diameters, a spray SMD of less than 120 microns and a STU value of .+-.50% or less.
    Type: Grant
    Filed: March 14, 1989
    Date of Patent: January 29, 1991
    Assignee: Electric Power Technologies, Inc.
    Inventor: Stuart Hersh
  • Patent number: 4986748
    Abstract: An oxygen-fuel burner is disclosed which has a wide range of operation, allowing turn-down ratios of 5 to 1. In addition, the burner construction, which is not liquid cooled, maintains an acceptable burner tip temperature by having a tip which extends outwardly beyond the nose portion of the burner such that the oxygen flows columnarly therealong and functions to remove heat from the tip. In addition a delayed combustion is obtained by the gas discharge tip being axially spaced apart from the oxygen discharge orifice. The burner produces sufficient heat to permit the melting of batch materials to produce molten glass without the use of regenerators or recuperators.
    Type: Grant
    Filed: December 15, 1989
    Date of Patent: January 22, 1991
    Assignee: Corning Incorporated
    Inventors: John T. Brown, John Kosco
  • 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: 4915617
    Abstract: The device for feeding waste air and/or combustion air to a burner has an upstream cyclindrical swirl inlet system (inlet header 1) with feeder nozzles (8,9) leading in tangentially. The main nozzle (8) is here provided at a radial distance R from the burner axis on the inlet header (1), which distance is greater than the radius r of the combustion chamber (4). By means of this increase in the swirl radius, a substantially higher swirl intensity can be generated at small throughputs. In order to avoid an undue rise in the swirl at higher throughputs, a secondary flow (7), which is fed in via a control element (11), is introduced into the inlet header (1) via a secondary nozzle (9) tangentially and opposite to the main swirling flow. Alternatively, the secondary flow (7) can also be fed to the inlet header (1) via inlet slots (14) substantially at right angles to the direction of the main flow. In both cases, the tangential flow component of the main flow (6) is slowed down.
    Type: Grant
    Filed: March 22, 1989
    Date of Patent: April 10, 1990
    Assignees: Bayer Aktiengesellschaft, Kleinewefers Energie-Und Umwelttechnik GmbH
    Inventors: Werner Huning, Claus Gockel, Herbert Wiebe, Kurt Noll, Otto Carlowitz
  • Patent number: 4909729
    Abstract: An improved arrangement of piston and cylinder assemblies for moving the air slides of fuel burners avoids build-up of combustion products on the piston. The cylinder is movable and the piston is fixed and located away from the burner so the cylinder can move toward and away from the burner on the piston to move the air slide.
    Type: Grant
    Filed: March 15, 1989
    Date of Patent: March 20, 1990
    Inventor: Patrick M. Donohue
  • Patent number: 4874310
    Abstract: A controlled primary air inspirating gas burner is provided with a fuel inspirating jet and an induced primary air passageway, with a means forming a separate control primary air passageway, together with means for controlling the introduction of control primary air. The content of nitrogen oxides in the flue gas is substantially reduced by introduction of regulated amounts of control primary air into the burner.
    Type: Grant
    Filed: February 25, 1988
    Date of Patent: October 17, 1989
    Assignee: Selas Corporation of America
    Inventors: Howard Seemann, Chad F. Gottschlich
  • Patent number: 4846080
    Abstract: Removable apparatus for regulating air flow through an air port in a chemical recovery furnace. A plenum mounted adjacent an air port inside a wind box associated with the furnace supplies combustion air from the wind box to the furnace through the air port, and an adjustable damper mounted inside the plenum regulates the velocity and quantity of air flowing through the plenum. An access port in the plenum allows viewing of the air port opening through the plenum. An actuating mechanism withdraws the damper from the field of view to a retracted position wherein the damper depends from the top of the plenum chamber spaced apart from the air port opening. For airflow damping, the actuating mechanism moves the retracted damper toward the air port opening until the damper is adjacent to the opening; then a positioning mechanism pivots the damper to a predetermined position in the air stream adjacent the opening.
    Type: Grant
    Filed: May 26, 1988
    Date of Patent: July 11, 1989
    Assignee: Anthony Ross Company
    Inventors: Thomas W. Ross, Robert B. Hill, Byron L. Goodspeed
  • 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: 4726763
    Abstract: A gas burner comprises a ceramic tube or nozzle through which a gaseous fuel flows, a chamber surrounding the ceramic tube, and means for delivering preheated combustion air to the chamber. The tube is made of an insulating ceramic in order to insulate the fuel from the preheated air. The inner portion of the tube comprises an insulating ceramic having lower thermal conductivity than that of the outer portion.
    Type: Grant
    Filed: September 24, 1982
    Date of Patent: February 23, 1988
    Assignee: GTE Products Corporation
    Inventor: Ray L. Newman
  • 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: 4681532
    Abstract: An air register is provided for admitting to and regulating combustion air in industrial open flame heated boilers and furnaces. The register comprises an outer member to impart rotation, balancing and blending of opposed incoming air streams; an inner member to impart a spiral motion to a resultant single air stream in the direction of the boiler or furnace entrance; and a third member to form the air stream into a flame encompassing envelope.
    Type: Grant
    Filed: May 2, 1985
    Date of Patent: July 21, 1987
    Inventor: Landy Chung
  • Patent number: 4651928
    Abstract: In the case of a light duty oil burner designed for an hourly flow rate of less than 5 kg of oil, the oil burner having a nozzle head (3) associated with a heat exchanger (1), the nozzle head having an injection nozzle (7) mounted on a centrally positioned nozzle holder (8) and supplied with oil, and an outer combustion tube (4) placed around the holder of the injection nozzle (7) with the formation of a combustion air duct (5) connected with an air supply, it is possible to obtain a high overall efficiency and a good compatibility with the environment, while at the same time keeping to the basic concept of conventional light duty burners, by so designing the burner that the oil flow rate through the injection nozzle (7), that is in the form of a non-return spin or simplex nozzle with a constant nozzle cross section, and the air flow rate in keeping with the instantaneous oil flow rate, through the combustion air duct (5) may be controlled in keeping with the load, the air flow rate through the combustion air
    Type: Grant
    Filed: November 15, 1984
    Date of Patent: March 24, 1987
    Inventor: Franklin Schmidt
  • Patent number: 4633667
    Abstract: A burner for a Stirling engine includes a baffle for partitioning the interior of a housing into an air chamber and a combustion chamber, the baffle having a centrally located cylindrical portion of tapered configuration, and a generally cylindrical ceramic burner cone for primary combustion of an air-fuel mixture, the burner cone being inserted into and retained by the cylindrical portion of the baffle and having a tapered outer circumferential surface and an annular end face on an upstream side thereof. The baffle is equipped with an engagement portion having an annular outer circumferential surface for engaging the annular end face of the burner cone. The burner cone is retained by the tapered cylindrical portion of the baffle and the engagement portion.
    Type: Grant
    Filed: March 11, 1986
    Date of Patent: January 6, 1987
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Tetsumi Watanabe, Akira Yamaguro
  • Patent number: 4629413
    Abstract: The invention relates to an improved premix burner and a method of its operation for combustion with a minimum of NO.sub.x emissions. The improvement is achieved by combining staged combustion with a premix burner in a manner such that mixing of the secondary air with the flame is delayed.
    Type: Grant
    Filed: September 10, 1984
    Date of Patent: December 16, 1986
    Assignee: Exxon Research & Engineering Co.
    Inventors: Herbert D. Michelson, James P. Stumbar
  • Patent number: 4626195
    Abstract: A low load burning burner comprising inner air flow nozzles, outer air flow nozzles and a fuel gas nozzle, and further having a motive air supply means, which is operated at the low load burning of a heating furnace, can maintain the furnace temperature uniform, and can heat materials arranged in the width direction of the furnace to a uniform temperature along the width direction of the furnace.
    Type: Grant
    Filed: May 8, 1985
    Date of Patent: December 2, 1986
    Assignees: Kawasaki Steel Corporation, Nippon Furnace Kogyo Kaisha, Ltd.
    Inventors: Kuniaki Sato, Shinichiro Muto, Noriaki Wako
  • Patent number: 4626204
    Abstract: The hot air generator according to the present invention comprises a vertical cylindrical enclosure whose walls are covered on the inside with refractory brick, the heating burner being placed at the top of the enclosure and the hot air exhaust orifice being situated at the base thereof, and in which the source of air by which it is fed is divided into three distinct flows: a first flow constituting the combustion air from the burner; a second flow constituting a first current of dilution air cylindrically surrounding the flame; a third flow constituting a second current of dilution air insufflated at the base of the enclosure so that the enclosure comprises three temperature zones: a first temperature zone which is that of the flame and is on the order of 1,800.degree.; a second temperature zone downstream of the flame and on the order of 900.degree.; a third temperature zone which is that of the second dilution current mixes with the flux of hot air which is comprised between 850.degree. and 300.degree..
    Type: Grant
    Filed: July 10, 1985
    Date of Patent: December 2, 1986
    Assignee: Societe des Ciments Francais
    Inventors: Raymond M. Saint Julian, Philippe M. Gehant, Ivan G. Bertrand, Michel H. Folliet
  • Patent number: 4604048
    Abstract: Methods and apparatus for combusting fuel-air mixtures while inhibiting the formation of nitrogen oxides are provided. The fuel is discharged from one or more nozzles disposed within a housing, air is caused to flow into the housing whereby it mixes with the fuel and the resulting fuel-air mixture is ignited and combusted. The nozzle or nozzles each include one or more ignition orifices for discharging a first portion of fuel in an ignition zone, one or more primary combustion orifices for discharging a second portion of fuel in a primary combustion zone containing excess air and one or more secondary combustion orifices arranged for discharging the remaining portion of fuel in the form of high velocity jets shielded by slower moving fuel within the downstream of the primary combustion zone whereby the fuel is burned in a secondary combustion zone substantially isolated from direct contact with incoming air by the primary combustion zone.
    Type: Grant
    Filed: May 6, 1985
    Date of Patent: August 5, 1986
    Assignee: John Zink Company
    Inventors: Robert E. Schwartz, Roger K. Noble
  • 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: 4575332
    Abstract: To allow liquid and/or gaseous fuels to be burned with decreased NO.sub.x formation, the combustion air is fed in at axial intervals one after the other. The percentage of primary air is higher than that of secondary air. The injector effect of the primary air draws flue gas out of the firebox and supplies it to a flame-initiation point between the primary-air and secondary-air feeds.
    Type: Grant
    Filed: June 26, 1984
    Date of Patent: March 11, 1986
    Assignee: Deutsche Babcock Werke Aktiengesellschaft
    Inventors: Rolf Oppenberg, Helmut Wiehn
  • 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: 4530657
    Abstract: An industrial burner has a burner housing having a burner head mounted therein and connected to an air pipe. A low pressure high efficiency blower is mounted in the housing adjacent an opening in the housing for drawing air into the burner housing and around the burner head into the combustion chamber. A high pressure turbo blower is located in the housing and connected to draw intake air entering the housing and direct the air under a greater pressure to the burner head through the connecting air pipe and into an industrial dryer. The high pressure blower is driven by an electric motor which also is connected by a belt to a pulley through a portion of the primary air conduit to drive the low pressure blower. The air intake for the housing has air control dampers mounted therein for controlling the flow of the air.
    Type: Grant
    Filed: January 31, 1984
    Date of Patent: July 23, 1985
    Inventors: David F. Brashears, Travis G. Porter
  • 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: 4519322
    Abstract: An apparatus for burning fuel oil or a fuel composed of a concentrated coal-water slurry has a circular air register with circumferentially overlapping vanes mounted concentrically to fuel supply means and larger diameter cylinders arranged to define a triple annuli therebetween adjacent to a frusto-conical burner port.
    Type: Grant
    Filed: June 21, 1984
    Date of Patent: May 28, 1985
    Assignee: The Babcock & Wilcox Company
    Inventors: Gerald D. Lindstrom, Clifford F. Eckhart, George A. Farthing, Jr., James J. Muckley, Brian E. Taylor
  • 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: 4504217
    Abstract: A low excess air burner having a venturi shaped insert in the burner housing to create an even air distribution across the burner throat opening. The venturi shaped insert is adjustable through a predetermined range of positions to control the flame shape and length at high loads and to trim the air flow at low loads. An offset or step in the burner throat creates a turbulent recirculation zone to stabilize the flame front and to hold ignition within the burner arch. A spinner defuser is provided at the open end of the burner housing to impart a rotary motion to the air to provide fuel air mixing and stabilizing of the flame front to aid ignition. Air inlets are surrounded with a housing and have a perforated plate shield covering them providing a smooth evenly distributed air supply to the burner housing. All fuel air mixing occurs at the open end of the burner and is contained in the refractory throat to eliminate premature ignition in the burner housing.
    Type: Grant
    Filed: October 14, 1983
    Date of Patent: March 12, 1985
    Assignee: Zurn Industries, Inc.
    Inventors: Richard E. Winschel, deceased, Fred B. Heil, Robert V. Seibel
  • 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: 4412808
    Abstract: The present invention resides in a dual fueled burner gun providing reduced production of oxides of nitrogen. The gun operates in a gaseous fueled mode when it is charged with a gaseous fuel or in a liquid fueled mode when it is charged with a liquid fuel. The gun may also operate in a gaseous/liquid fueled mode in which it is charged with both the gaseous and liquid fuels.
    Type: Grant
    Filed: June 19, 1980
    Date of Patent: November 1, 1983
    Assignee: TRW Inc.
    Inventors: Douglas B. Sheppard, James A. Kezerle, Ellis W. Sheffield
  • Patent number: 4400151
    Abstract: A burner assembly in which an inlet is located at one end of an annular passage for receiving fuel, and an outlet is located at the other end of the passage for discharging the fuel. A plurality of blocks are disposed within the annular passage for splitting up the fuel discharging from said outlet so that, upon ignition of said fuel, a plurality of flame patterns are formed. A register assembly is provided which includes an enclosure for receiving air and a divider for directing the air from the enclosure towards the outlet in two parallel paths extending around the burner. Registers are disposed in each of the paths for regulating the quantity of air flowing through the paths.
    Type: Grant
    Filed: May 28, 1982
    Date of Patent: August 23, 1983
    Assignee: Foster Wheeler Energy Corporation
    Inventor: Joel Vatsky
  • 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: 4357134
    Abstract: A method and apparatus are provided for burning fuel, with controlled NOx formation, in a burner-fired furnace. A fuel injection port is provided in the furnace, surrounded by a plurality of air injection ports. The fuel and combustion air are injected in such a manner as to minimize their contact in a burner tile port. The injected air establishes a vacuum within the burner tile port. The spent gas is drawn to near the fuel and air injection ports along the cylindrical surface of the burner tile port. The drawn spent gas encloses the fuel and air streams in the burner tile port. Primary combustion of the fuel is achieved by using mainly the oxygen contained in the enclosing spent gas. Secondary combustion is effected by bringing in contact the streams of the combustion air and fuel in the furnace into which burner the tile port opens.
    Type: Grant
    Filed: June 15, 1981
    Date of Patent: November 2, 1982
    Assignee: Nippon Steel Corporation
    Inventors: Matsuzaki Katsushige, Narazaki Seiji, Kawaguchi Masanori
  • Patent number: 4348170
    Abstract: A burner assembly in which an inlet is located at one end of an annular passage for receiving fuel, and an outlet is located at the other end of the passage for discharging the fuel. A divider cone is disposed within the annular passage for dividing the stream of fuel passing through the passage into two parallel coaxial streams and additional secondary air is introduced into the outer stream. A plurality of V-shaped members are disposed within the annular passage for splitting up the outer stream of fuel so that, upon ignition of said fuel, a plurality of flame patterns are formed. A register assembly is provided which includes an enclosure for receiving air and a divider for direction the air from the enclosure towards the outlet in two parallel paths extending around the burner. Register vanes are disposed in each of the paths for regulating the spin and/or quantity of air flowing through the paths.
    Type: Grant
    Filed: June 4, 1980
    Date of Patent: September 7, 1982
    Assignee: Foster Wheeler Energy Corporation
    Inventors: Joel Vatsky, Norman K. Trozzi
  • Patent number: 4347052
    Abstract: A fluid fuel burner system for minimum production of NOX under varying rates of fuel firing and varying rates of combustion air or oxidant supply, which comprises a fuel burner including means for burning liquid and gaseous fuel. Liquid fuels are burned in an axial burner tube, and the gaseous fuels are burned in a plurality of gas burner tubes located in a circle coaxial with the liquid burner. A first air or oxidant plenum supplies primary-plus-secondary air or oxidant, the primary air or oxidant going to the liquid burner and the secondary air or oxidant going to the gas burner. The total of primary plus secondary is less than stoichiometric flow so that the combustion of the fuel in a first combustion chamber provides a reducing atmosphere to preclude the formation of NOX. Means are provided for independently controlling the primary air or oxidant flow compared to the secondary air or oxidant flow, or vice versa.
    Type: Grant
    Filed: April 2, 1979
    Date of Patent: August 31, 1982
    Assignee: John Zink Company
    Inventors: Robert D. Reed, Richard R. Martin, Hershel E. Goodnight
  • Patent number: 4281983
    Abstract: A premix-type gaseous fuel burning system for alternate or simultaneous combustion of low BTU gas and normal BTU gas comprises a gas supply means for providing both high BTU gas and low BTU gas at selected substantial velocity, and a burner tube for receiving said gas, whereby primary air is inducted into the burner tube and mixed with the gas flow. A burner head comprises a long narrow rectangular structure of tapered construction that is inserted upwardly into a corresponding rectangular opening in the floor of the furnace. The opening is also tapered in the same direction as the burner head, but with a selected annular spacing between the walls of the opening and the burner head. Means are provided for vertically adjusting the position of the burner head within the opening. Secondary combustion air is directed through the annular space between the burner head and the opening in the floor of a furnace.
    Type: Grant
    Filed: April 6, 1979
    Date of Patent: August 4, 1981
    Assignee: John Zink Company
    Inventors: Hershel E. Goodnight, Kurt S. Jaeger
  • Patent number: 4257763
    Abstract: A low NOx burner for a furnace operating under natural draft in which primary and secondary combustion air are provided to a first burning zone, in which either or both liquid and gaseous fuel can be used. Less than stoichiometric air is supplied in the primary burning zone and tertiary combustion air is supplied in a second combustion zone downstream from the first combustion zone. The total air supply is over the stoichiometric requirement. Air control means is provided so that a fixed ratio of primary-secondary air/tertiary air is provided for all burning and fuel rate conditions, so as to maintain the less than stoichiometric air supply to the first combustion zone. In addition, water atomization is provided upstream of the first burning zone to provide a burning chemistry which favors the reduction of NOx in the first burning zone.
    Type: Grant
    Filed: June 19, 1978
    Date of Patent: March 24, 1981
    Assignee: John Zink Company
    Inventor: Robert D. Reed
  • Patent number: 4253403
    Abstract: A fuel-staging burner assembly and method in which a burner nozzle has separate, concentrically disposed elements to burn coarse and fine coal particles under different combustion conditions to reduce the production of nitrogen oxides from the combustion of coal as a fuel. The burner assembly further includes a control nozzle for maintaining a swirling motion in the combustion flame and a separate, axially-movable adjustable sleeve for regulating the quantity flow of turbulence-free combustion-supporting air.
    Type: Grant
    Filed: October 2, 1979
    Date of Patent: March 3, 1981
    Inventor: Joel Vatsky
  • Patent number: 4240788
    Abstract: An intermittent top firing tunnel kiln equipped with a burner having a ceramic air nozzle, in which an air nozzle assembly is mounted to a wind box adjacent to the burner tile through a burner support tile, said assembly being constructed by a metallic air supply pipe supported by a metal fixture at the ceiling portion of the kiln and being connected at the tip of said pipe to the ceramic air nozzle, and in which an oil nozzle is disengagably provided at the center in said air nozzle assembly, whereby the secondary air for combustion is supplied to said wind box through the walls of the kiln.
    Type: Grant
    Filed: June 14, 1979
    Date of Patent: December 23, 1980
    Assignee: Shinagawa Refractories Co., Ltd.
    Inventors: Kiyoshi Naito, Akio Syukuya
  • Patent number: 4230449
    Abstract: A low pressure burner capable of generating a relatively long narrow flame is disclosed. A rotationally symmetric chamber is open at each end. Air is forced through the chamber at low pressure, generally no greater than about 0.3 lbs. per square inch above ambient. An atomizer is located in the chamber and expels a combustible mixture out through the downstream end of the chamber. The mixture expelled by the atomizer of the present invention has a distribution which is not rotationally symmetric about the chamber axis. The atomizer utilizes low pressure air provided at no greater than about 4.5 lbs. per square inch above ambient. A flame throat is located at the downstream end of the chamber, and includes at least two axially spaced steps to induce and control eddy formation in the mixture. The nonsymmetric mixture distribution and the multistep chamber combine to provide a long, narrow, stable flame in the throat at relatively low inlet air pressures.
    Type: Grant
    Filed: March 19, 1979
    Date of Patent: October 28, 1980
    Assignee: Coen Company
    Inventors: Chester S. Binasik, Ralph R. Vosper, Norman E. Harthun
  • Patent number: 4225305
    Abstract: A combustion head for a fluid fuel, particularly a liquid fuel, which is burnt particularly in the presence of a gas having an oxygen concentration substantially less than that of air, comprises, adjacent to the actual burner, a generally cylindrical box containing an inlet aperture designed to create a substantial pressure drop on injecting the oxygen-containing gas into the box, and a disc situated at the outlet of the box and dimensioned to create a second and lower pressure drop. The intense combustion produced in the box heats its walls to a temperature substantially above the final point of the distillation curve for the fuel, so preventing coke deposition.
    Type: Grant
    Filed: December 6, 1978
    Date of Patent: September 30, 1980
    Assignee: Pietro Fascione
    Inventors: Herbert R. Hazard, Vincenzo Recchi
  • Patent number: 4203718
    Abstract: A register for regulating the flow of air toward an inner combustion region has a plurality of spaced and inwardly directed vanes affixed between two annular members. A plurality of spaced guide means peripherally disposed around the vanes, are mounted across the two annular members. A sleeve which is linearly movable upon the guide means enshrouds the vanes by a variable amount. By moving the sleeve, the inward flow of air past the vanes can be regulated.
    Type: Grant
    Filed: June 29, 1978
    Date of Patent: May 20, 1980
    Assignee: Foster Wheeler Energy Corporation
    Inventor: James L. Tracy
  • Patent number: 4181491
    Abstract: The method for heating the furnace chamber produces high momentum levels during the heat treating cycle so as to obtain substantially uniform temperature throughout the charge. The method includes initially firing a plurality of high velocity burners at substantially maximum fuel input and in substantially stoichiometric ratio. Thereafter, the fuel input is reduced while maintaining the stoichiometric ratio at least during the high input portion of the cycle. Excess air is introduced external of the combustion zones of the burners on a predetermined signal such as a given fuel input reduction to maintain the desired momentum level within the furnace. The apparatus comprises a high velocity burner having associated therewith an excess air unit for discharging excess air external of the combustion chamber or port block of the burner.
    Type: Grant
    Filed: January 18, 1978
    Date of Patent: January 1, 1980
    Assignee: Bloom Engineering Company, Inc.
    Inventor: James E. Hovis
  • Patent number: 4152108
    Abstract: Apparatus for burning gaseous and liquid fuels in a furnace, to retard formation of NO.sub.x, comprising a fuel tube of selected length and diameter, closed at the end which is inserted into a combustion zone. There are a plurality of ports drilled in the closed end of the fuel tube, the axes of which lie on a conical surface coaxial with the fuel tube. The fuel tube is inserted coaxially into a burner tube of selected larger diameter, and the distant ends are substantially coplanar. A plurality of jets of low pressure steam are injected through a plurality of ports into the annular space between the fuel tube and the burner tube at the outer end of the burner tube. The steam jets flowing through the ports induce a flow of primary combustion air, which mixes with the steam and flows down the annular space to mix with the high velocity jets of fuel as they emerge from the ports on the fuel tube. The fuel, air, and steam mix together prior to entering the combustion reaction zone.
    Type: Grant
    Filed: July 15, 1977
    Date of Patent: May 1, 1979
    Assignee: John Zink Company
    Inventors: Robert D. Reed, Richard R. Martin, Hershel E. Goodnight