Pivotally Adjustable Blades Patents (Class 431/184)
  • Patent number: 10408454
    Abstract: A gas turbine combustor assembly includes a fuel injector, a dome stator around the fuel injector, and a dome sleeve coupled to the dome stator. The dome sleeve defines an air inlet opening with the dome stator, and is carried to move with respect to the dome stator to change a flow area of the air inlet opening. The dome sleeve also defines a nozzle sloping downstream from the air inlet opening toward an outlet of the combustor assembly. The sloping nozzle defines an annular pinch gap adjacent an outlet of the fuel injector, and is coupled to move with the dome sleeve to change a flow area through the pinch gap.
    Type: Grant
    Filed: June 18, 2013
    Date of Patent: September 10, 2019
    Assignee: Woodward, Inc.
    Inventors: Fei Philip Lee, Hukam Chand Mongia, Kathleen M. Tacina, Chi-Ming Lee, Daniel L. Bulzan
  • Publication number: 20140057217
    Abstract: A burner having a secondary air regulator is provided. The secondary air regulator has an end plate having a bored hole penetrating in an axial direction and for forming a cylindrical space with peripheral surface opened in a space with the furnace core side surface of the wind box, a rotary damper having a bored hole penetrating in an axial direction and being capable to open or close the hole on the end plate by rotating in a peripheral direction, a sliding damper for surrounding the cylindrical space and being slidable in an axial direction, air vanes installed at a predetermined distance along circumference of the cylindrical space and for giving swirling to the secondary air, first driving means for rotating the rotary sliding damper, and second driving means for sliding the sliding damper.
    Type: Application
    Filed: September 23, 2013
    Publication date: February 27, 2014
    Applicant: IHI Corporation
    Inventors: Masato Tamura, Shinji Watanabe
  • Patent number: 8517719
    Abstract: A simple, economical and reliable swirl register [1000] is described for use with a wall burner of a commercial boiler. It employs a number of spaced swirl blocks [1150] that connect side plates [1110, 1120]. A number of moveable vanes [1130] are provided in the air ducts [1155] created between the swirl blocks [1150]. The vanes [1130] are attached to vane rods [1160] that operate the vanes [1130]. The swirl blocks [1150] are lightweight and rigid structures for holding the side plate [1110] a fixed distance from side plate [1120]. The block construction reduces binding of the vanes [1130] as the swirl register [1000] receives differential heating. The vane rods [1160] extend through a windbox front plate [1250] outside of the windbox area. A linkage assembly [1200] rotates the vane rods [1160]. A motor and gearbox [1230] cause all vanes [1130] to rotate the same amount.
    Type: Grant
    Filed: February 27, 2009
    Date of Patent: August 27, 2013
    Assignee: ALSTOM Technology Ltd
    Inventor: Oliver G. Briggs, Jr.
  • Patent number: 8113824
    Abstract: A large diameter mid-zone air separation cone is provided for decreasing NOx during burner operation by expanding the internal recirculation zone (IRZ) at the burner exit. The mid-zone air separation cone has a short cylindrical leading edge that fits in the outer air zone of a burner. The mid-zone air separation cone splits the outer air zone secondary air flow into two equal or unequal streams depending on the position of the air separation cone with respect to the outer air zone, and deflects a portion of the secondary air flow radially outward. Since the radial position of the air separation cone is farther from the burner centerline, the IRZ size is expanded and NOx emissions are minimized.
    Type: Grant
    Filed: June 1, 2006
    Date of Patent: February 14, 2012
    Inventors: Hamid Sarv, Albert D. LaRue, William J. Kahle, Alan N. Sayre, Daniel R. Rowley
  • Publication number: 20100221673
    Abstract: A simple, economical and reliable swirl register [1000] is described for use with a wall burner of a commercial boiler. It employs a number of spaced swirl blocks [1150] that connect side plates [1110, 1120]. A number of moveable vanes [1130] are provided in the air ducts [1155] created between the swirl blocks [1150]. The vanes [1130] are attached to vane rods [1160] that operate the vanes [1130]. The swirl blocks [1150] are lightweight and rigid structures for holding the side plate [1110] a fixed distance from side plate [1120]. The block construction reduces binding of the vanes [1130] as the swirl register [1000] receives differential heating. The vane rods [1160] extend through a windbox front plate [1250] outside of the windbox area. A linkage assembly [1200] rotates the vane rods [1160]. A motor and gearbox [1230] cause all vanes [1130] to rotate the same amount.
    Type: Application
    Filed: February 27, 2009
    Publication date: September 2, 2010
    Inventor: Oliver G. Briggs, JR.
  • Publication number: 20070281265
    Abstract: A large diameter mid-zone air separation cone is provided for decreasing NOx during burner operation by expanding the internal recirculation zone (IRZ) at the burner exit. The mid-zone air separation cone has a short cylindrical leading edge that fits in the outer air zone of a burner. The mid-zone air separation cone splits the outer air zone secondary air flow into two equal or unequal streams depending on the position of the air separation cone with respect to the outer air zone, and deflects a portion of the secondary air flow radially outward. Since the radial position of the air separation cone is farther from the burner centerline, the IRZ size is expanded and NOx emissions are minimized.
    Type: Application
    Filed: June 1, 2006
    Publication date: December 6, 2007
    Inventors: Hamid Sarv, Albert D. LaRue, William J. Kahle, Alan N. Sayre, Daniel R. Rowley
  • Patent number: 7267809
    Abstract: The invention relates to a burner with a burner head (1) and a gas feed pipe (2) that is located in the burner head (1) and that is surrounded by an ring channel (3) for feed of another gas. In the gas feed pipe (2) and in the ring channel (3), there are means (10, 11) for producing a swirl of the gas flowing through the gas feed pipe (2) and that flowing through the ring channel (3).
    Type: Grant
    Filed: October 18, 2001
    Date of Patent: September 11, 2007
    Assignee: The Linde Group
    Inventors: Harald Ranke, Michael Heisel, Sebastian Muschelknautz, Hanno Tautz
  • Patent number: 7229483
    Abstract: A method for gasifying carbonaceous materials to fuel gases comprises the formation of an ultra-superheated steam (USS) composition substantially containing water vapor, carbon dioxide and highly reactive free radicals thereof, at a temperature of about 2400° F. (1316° C.) to about 5000° F. (2760° C.). The USS composition comprising a high temperature clear, colorless flame is contacted with a carbonaceous material for rapid gasification/reforming thereof. The need for significant superstoichiometric steam addition for temperature control. Methods for controlling a gasification/reforming system to enhance efficiency are described. A USS burner for a fluidized bed gasification/reforming reactor, and methods of construction, are described.
    Type: Grant
    Filed: April 1, 2002
    Date of Patent: June 12, 2007
    Inventor: Frederick Michael Lewis
  • Patent number: 6386863
    Abstract: A compound spin vane (CSV) for use in an air passage of a fossil fuel-fired burner. In one embodiment, the CSV is a multi-piece construction of platelike outer and inner vane elements connected to an intermediate platelike rail element. In another embodiment, the CSV includes at least two and possibly three vane portions, rigidly interconnected in spaced lateral relationship with respect to each other. If desired, the vane portions may be simple, curved planar surfaces, and may be arranged with trailing edges arranged at angles with respect to each other. The invention may be employed as a replacement for flat spin vanes found in secondary air passages of known single and dual register burners. When used in such manner in a single register burner, the invention changes secondary air flow characteristics so as to mimic those commonly found in a dual register burner.
    Type: Grant
    Filed: April 18, 2000
    Date of Patent: May 14, 2002
    Assignee: The Babcock & Wilcox Company
    Inventors: Hamid Sarv, Jeffrey A. LaRose, Albert D. LaRue, Peter W. Waanders
  • Patent number: 6146130
    Abstract: A compound spin vane (CSV) for use in an air passage of a fossil fuel-fired burner. In one embodiment, the CSV is a multi-piece construction of platelike outer and inner vane elements connected to an intermediate platelike rail element. In another embodiment, the CSV includes at least two and possibly three vane portions, rigidly interconnected in spaced lateral relationship with respect to each other. If desired, the vane portions may be simple, curved planar surfaces, and may be arranged with trailing edges arranged at angles with respect to each other. The invention may be employed as a replacement for flat spin vanes found in secondary air passages of known single and dual register burners. When used in such manner in a single register burner, the invention changes secondary air flow characteristics so as to mimic those commonly found in a dual register burner.
    Type: Grant
    Filed: October 26, 1998
    Date of Patent: November 14, 2000
    Assignee: The Babcock & Wilcox Company
    Inventors: Hamid Sarv, Jeffrey A. LaRose, Albert D. LaRue, Peter W. Waanders
  • Patent number: 5993199
    Abstract: A burner design for use especially with rotary dryers is provided, in which a primary firing tube is provided with an oil body disposed proximate the burner tip portion of the firing tube, the oil body being constructed to divide an airflow into an outer portion flowing through an outer airstream passageway and an inner portion flowing through an inner airstream passageway, and to cause said inner and outer portions to intersect each other proximate the burner tip portion. The oil body is further provided with a slit opening on an inner surface thereof along a boundary of the inner airstream passageway, the slit opening being in fluid communication with a supply of fuel oil, whereby fuel oil can be delivered at low pressure at an inner surface of the oil body, whereupon the inner airstream portion will cause the fuel oil to film along the inner surface of the oil body and to be intersected by the inner and outer airstream portions to atomize the fuel oil at the burner tip.
    Type: Grant
    Filed: June 24, 1997
    Date of Patent: November 30, 1999
    Inventor: Charles R. Safarik
  • Patent number: 5829369
    Abstract: A burner having lower emissions and lower unburned fuel losses by implementing a transition zone in a low NO.sub.x burner. The improved burner includes a pulverized fuel transport nozzle surrounded by the transition zone which shields the central oxygen-lean fuel devolatilization zone from the swirling secondary combustion air. The transition zone acts as a buffer between the primary and the secondary air streams to improve the control of near-burner mixing and flame stability by providing limited recirculation regions between primary and secondary air streams. These limited recirculation regions transport evolved NO.sub.x back towards the oxygen-lean fuel pyrolysis zone for reduction to molecular nitrogen. Alternate embodiments include natural gas and fuel oil firing.
    Type: Grant
    Filed: November 12, 1996
    Date of Patent: November 3, 1998
    Assignee: The Babcock & Wilcox Company
    Inventors: Jennifer L. Sivy, Larry W. Rodgers, John V. Koslosy, Albert D. LaRue, Keith C. Kaufman, Hamid Sarv
  • Patent number: 5827054
    Abstract: A compound spin vane (CSV) for use in an air passage of a fossil fuel-fired burner. In one embodiment, the CSV is a multi-piece construction of platelike outer and inner vane elements connected to an intermediate platelike rail element. In another embodiment, the CSV includes at least two and possibly three vane portions, rigidly interconnected in spaced lateral relationship with respect to each other. If desired, the vane portions may be simple, curved planar surfaces, and may be arranged with trailing edges arranged at angles with respect to each other. The invention may be employed as a replacement for flat spin vanes found in secondary air passages of known single and dual register burners. When used in such manner in a single register burner, the invention changes secondary air flow characteristics so as to mimic those commonly found in a dual register burner.
    Type: Grant
    Filed: January 11, 1996
    Date of Patent: October 27, 1998
    Assignee: The Babcock & Wilcox Company
    Inventors: Hamid Sarv, Jeffrey A. LaRose, Albert D. LaRue, Peter W. Waanders
  • Patent number: 5823764
    Abstract: A low NOx burner comprising ducts for the primary (6), secondary (7) and tertiary air (14), arranged coaxially around its longitudinal axis, for supplying of the primary, secondary and tertiary air, respectively, to a combustion chamber (3), means for accumulation of the air (5), means to give vorticity to the primary, secondary and tertiary air (11, 15, 27) installed in the respective ducts, means for supply of fuel (23, 32, 43) arranged within said ducts to inject the fuel into said combustion chamber. The axial swirler for the secondary air (11) is formed by a plurality of blades each of which is made up of a stationary part (11a) and a mobile part (11b) connected to actuator means capable of moving it in an angular direction to give an air outlet angle of between 30.degree. and 60.degree.. The axial swirler for the tertiary air is conical in shape and has fixed blades. On the tertiary air duct a passage (16) is formed for supply of secondary and tertiary air.
    Type: Grant
    Filed: July 15, 1997
    Date of Patent: October 20, 1998
    Assignees: Ansaldo Energia S.p.A., Enel S.p.A.
    Inventors: Marco Alberti, Roberto Rizzi, Marcello Martano, Gennaro De Michele, Sergio Ligasacchi
  • Patent number: 5807094
    Abstract: An air premixed natural gas burner having reduced thermal and prompt NO.sub.x emissions employs a central, cylindrical core chamber and an outer annular chamber separated by a hollow barrel having a plurality of gas spuds at a front end of the burner adjacent to a burner throat. The plurality of gas spuds introduces natural gas into a core chamber air flow passing through a fixed swirler and controlled by a sliding air flow damper associated with the central, cylindrical core chamber. A reduced air/fuel stoichiometric ratio (of approximately 0.6) is preferably maintained at an outlet of the central, cylindrical core chamber. The balance of the combustion air is provided through the outer annular chamber to maintain an overall or cumulative burner stoichiometric ratio of approximately 1.05.
    Type: Grant
    Filed: August 8, 1997
    Date of Patent: September 15, 1998
    Assignee: McDermott Technology, Inc.
    Inventor: Hamid Sarv
  • Patent number: 5755567
    Abstract: A spin vane for burners and over fire air ports in a furnace comprise a sheet-like vane element having a base and an extension extending perpendicularly off the base on the low pressure side of the vane element. The extension reduces the formation and propagation of vortices on the low pressure side of the vane, increasing flow efficiency and reducing pressure loss across the spin vanes.
    Type: Grant
    Filed: February 21, 1996
    Date of Patent: May 26, 1998
    Assignee: The Babcock & Wilcox Company
    Inventors: Morten Licht, Robert J. Giammaruti, Steven A. Thoma
  • Patent number: 5664944
    Abstract: A vane assembly defining a flow passage for gas moving in a flow direction has at least one spin vane in the flow passage, positionable at an angle with respect to the flow direction. The vane is made of-sheet material and has a leading portion which is perforated. This reduces pressure drop across the vane while still maintaining spin of the gas.
    Type: Grant
    Filed: November 15, 1996
    Date of Patent: September 9, 1997
    Assignee: The Babcock & Wilcox Company
    Inventors: George B. Watson, Woodrow A. Fiveland
  • Patent number: 5649494
    Abstract: A burner (10) for the combustion of fuel comprises a passage (32) through which in operation a mixed flow of fuel and air passes for primary combustion at it's outlet. Two further annular passages (34, 36), concentric with and radially outward of the passage (32), are provided through which supplementary flows of air pass to support the primary combustion. The outlets of the two annular passages (34, 36) diverge to discharge the supplementary flows of air at an angle to the mixed flow of fuel and air. Members (62) are provided in the annular passage which obstruct the discharge of the supplementary flow of air. Furnace gases circulate in the region downstream of the obstruction members (62). Circulation of the furnace gases delays the mixing of the fuel and air mixture with the supplementary air flows to reduce the nitrogen oxides produced.
    Type: Grant
    Filed: February 10, 1995
    Date of Patent: July 22, 1997
    Assignee: Rolls-Royce Power Engineering plc
    Inventor: Peter F. Hufton
  • Patent number: 5649819
    Abstract: An improved low NO.sub.x burner for firing fuels such as fuel oil, fuel gas and the like having an improved register which includes primary and secondary registers. The primary and secondary registers each have an annular perforated shield covering primary and secondary air inlets. The annular perforated shields form primary and secondary air equalizers which provide a more uniform distribution of combustion air about the register as the combustion air enters the register through primary and secondary air inlets, increasing regulation of combustion air and reducing flame impingement. Annular primary and secondary dampers adjustably cover the primary and secondary air equalizers to slidably adjust the ratio of primary to secondary air entering the primary and secondary registers through the primary and secondary air inlets.
    Type: Grant
    Filed: May 25, 1995
    Date of Patent: July 22, 1997
    Assignee: Gordon-Piatt Energy Group, Inc.
    Inventor: Samicci A. Karzone
  • Patent number: 5415114
    Abstract: A burner flame stabilizer which circumferentially stages the air to form circumferentially-spaced fuel rich and fuel lean zones for lowering of NO.sub.x is described. A circumferential solid fuel stager is described, which operates with a fuel stabilizer to provide increased dwell time for coal particles volatilization in a recirculation zone established by the flame stabilizer. Various embodiments are described.
    Type: Grant
    Filed: October 27, 1993
    Date of Patent: May 16, 1995
    Assignee: RJC Corporation
    Inventors: Richard J. Monro, R. Gifford Broderick
  • 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: 5257927
    Abstract: A low NO.sub.x burner combustion system which may be adjusted for optimum burn rates, temperature and oxygen levels. The burner incorporates a plurality of gas nozzles which individually inspirate a portion of the combustion air and a spin vane diffuser to rotate and mix the gases within the primary combustion zone. The diffuser is axially adjustable in order to vary the distance between the vane and the first combustion zone while the blades of the diffuser can be angularly adjusted to optimize the rotation and mix of the gases. Air for combustion is supplied through primary, secondary and tertiary passages to create distinct combustion zones for complete combustion. The flow rate of the combustion air is controlled through a damper in accordance with the burn characteristics. The angular and axial position of the diffuser and the damper control of combustion air can be automatically adjusted throughout the firing range of the burner in response to demand levels.
    Type: Grant
    Filed: November 1, 1991
    Date of Patent: November 2, 1993
    Assignee: Holman Boiler Works, Inc.
    Inventor: Jerry M. Lang
  • Patent number: 5192204
    Abstract: A turbo burner assembly provides for dispersion of liquid fuel into a flame region adjacent a burner head of the assembly by using compressed air to force a fine spray through apertures in an atomizing assembly. The dispersed fuel is supplied at a variable rate that corresponds to the combustion settings of the burner over the entire operating range of the burner. The dispersed fuel becomes entrained into a low quantity flow of high velocity turbo air. The quantity or rate of flow of the high velocity turbo air corresponds to the combustion air required for the correct air to fuel mixture at the lowest fuel flow rate. At increasing fuel flow rates for increased combustion settings a second low velocity stream of turbo air is introduced at a variable volume flow rate to provide together with the first stream of turbo air a correct combustion mixture with the introduced fuel over the entire range of combustion settings of the burner assembly. A gaseous fuel can be substituted for the liquid fuel.
    Type: Grant
    Filed: March 20, 1992
    Date of Patent: March 9, 1993
    Assignee: Cedarapids, Inc.
    Inventor: Joseph E. Musil
  • Patent number: 5145359
    Abstract: An improved burner (4) for fuel oil and fuel gas with low NOx production, wherein the combustion air is subdivided in three streams and with flow rate control swirlers in each air streams. The stream of primary air is intercepted by a swirler comprising an array of radially fixed tabs (15) mounted in correspondence to the outlet section in the combustion chamber (3), while the secondary and tertiary air swirlers comprise tabs (18, 19) turnable around axes disposed perpendicular and parallel to the central axis of the burner, respectively. The primary and secondary air inlets have a variable, continuously adjustable section. Furthermore, there are provided mass rate meters (24, 25) near the outlet section of the secondary and tertiary air streams in the combustion chamber (3) substantially unaffected by the vorticity induced by said swirlers.
    Type: Grant
    Filed: April 22, 1991
    Date of Patent: September 8, 1992
    Assignees: Ente Nazionale Per l'Energia Elettrica, Ansaldo Componenti s.r.l.
    Inventors: Giuseppe Ancona, Giancarlo Benelli, Gennaro De Michele, Sergio Ligasacchi, Gianni Mascalzi, Giancarlo Scavizzi, Giuliano Trebbi, Aldo Zennaro
  • Patent number: 5092762
    Abstract: Improved radial vanes of a swirl generator, which are rotatably radially disposed at the fluid outlet of a bellow, wherein a handle device is used to make the radial vanes rotate within 0-80 range for adjusting the air swirl intensity required by the burner, the fluid flowing through the vanes to directly coil into the combustion chamber so as to avoid the drawbacks of high pressure drop and high turbulent flow intensity occurring at the inlet of a burner.
    Type: Grant
    Filed: January 15, 1991
    Date of Patent: March 3, 1992
    Assignee: Industrial Technology Research Institute
    Inventor: Shyh-Ching Yang
  • Patent number: 4927352
    Abstract: A dual register for controlling the flow of combustion air to a burner including an outer register formed by a mounting frame having spaced apart support plates interconnected by circumferentially spaced fixed housing members. The frame defines a plurality of inlet openings for admitting a first stream of air substantially radially from a wind box. Each inlet opening includes at least one, non-planar, oblique parallelogram shaped curved damper door for controlling the admission of combustion air into an inner region of the outer register; each damper door is configured to impart a rotational component to the first stream of air while urging it axially towards a burner region. A connector for connecting the register to the combustion air region includes a plurality of apertures for communicating a second stream of air from the wind box to an outlet region of the register.
    Type: Grant
    Filed: July 19, 1988
    Date of Patent: May 22, 1990
    Inventor: Landy Chung
  • Patent number: 4718359
    Abstract: An apparatus is described for burning solid fuels, preferably coal in pulverized form, which are mixed with a carrier liquid, such as water and/or oil or the like, to thereby form an emulsion, and for this purpose the fuel emulsion is injected through a substantially annular entrance port into a combustion chamber so that an approximately hollow cone-shaped flow configuration is produced. Within this flow configuration, a low pressure is built up immediately behind the entrance port for the fuel emulsion opening into the combustion chamber so that a portion of hot combustion gases and a remainder of unburnt fuel particles are recirculated to the entrance port. Furthermore, gas entrance ports are provided in the end wall of the combustion chamber, through which the gas or air flows, the path of flow of which extends concentrically and spirally towards the axis of the entrance port for the fuel emulsion opening into the combustion chamber.
    Type: Grant
    Filed: January 3, 1986
    Date of Patent: January 12, 1988
    Assignee: Stubinen Utveckling Ab
    Inventor: Kurt Skoog
  • Patent number: 4688496
    Abstract: The flame established in the combustion chamber is short in the direction of material flow and of tornado configuration due in part to swirling in spiral fashion of primary air bearing pulverized coal particles along a conduit together with swirling in spiral fashion of secondary or combustion air along a conduit which is concentrically arranged with respect to the primary air and coal particle conduit so that these two flame components are dispersed in a transversely outward manner due to centrifugal force and for wall jet attraction and by this means the longitudinal length customarily necessary for high temperature pulverized coal burners is substantially shortened and the temperature at which combustion may take place is substantially reduced.
    Type: Grant
    Filed: July 28, 1986
    Date of Patent: August 25, 1987
    Assignee: Enatech Corporation
    Inventor: Robert E. Schreter
  • 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: 4600377
    Abstract: A liquid fuel burner head features an axially movable primary air assembly carrying a centrally disposed nozzle spraying fuel radially of the burner head. Primary air ports surround the nozzle and include means for progressively increasing swirl of the primary air as radial distance from the nozzle increases and for adjusting the location of flame origin. Metering of secondary air and adjustment of its direction of swirl are both accomplished rearward of the secondary air outlet, the primary air assembly moving rearwardly to increase the secondary air as firing rate rises. A simple metal, frusto-conical flame holder is secured to and spaced forwardly of the burner head.
    Type: Grant
    Filed: May 29, 1985
    Date of Patent: July 15, 1986
    Assignee: Cedarapids, Inc.
    Inventor: Joseph E. Musil
  • Patent number: 4559009
    Abstract: A swirl-type internal flame recirculation burner as used to fire asphalt plant aggregate dryers, air heaters and calcining kilns and method includes an atomizer assembly for swirling primary air in two concentric streams with the inner stream swirling more rapidly than the outer stream. Fuel oil is blast atomized in a continuous sheet into the inner stream without prefilming and then is shear atomized as the inner and outer streams violently intermix. The burning and swirling fuel and primary air mixture recirculates upstream along the burner axis. Secondary air is swirled in the same direction as the primary air and surrounds the primary air stream to promote further mixing and internal recirculation. A metal frustro-conical flame holder surrounds the burner head to stabilize and shape the recirculation flame and shield low-burn flames from tertiary air. The swirl of the secondary air is also adjusted to shape the flame. The burner may also be fired on gas or a combination of gas and oil.
    Type: Grant
    Filed: September 12, 1984
    Date of Patent: December 17, 1985
    Assignee: Hauck Manufacturing Company
    Inventors: John A. Marino, Roderick G. Strohl, Jr., Robert B. Yost
  • 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: 4500282
    Abstract: The disclosed burner guide vane device includes a housing with an inlet pipe and a cylindrical swirl chamber having equidimensional gas inlet ports symmetrically arranged therein in diametral opposition to each other; pivotable vanes or gates are located centrally of these inlet ports on axles to which they are attached by their central portions, the vanes having their radius of curvature 1.2 to 1.6 times greater than that of the swirl chamber.
    Type: Grant
    Filed: May 27, 1981
    Date of Patent: February 19, 1985
    Inventors: Vladislav Y. Eschenko, Irsali K. Musaev, Zakhidzhan S. Talibdzhanov, Viktor A. Leonov, Anatoly D. Bobrov, Efim I. Kirovsky, Vladimir A. Gritsenko, Alexandr V. Golovanov
  • Patent number: 4492171
    Abstract: A solid fuel burner apparatus is provided for burning low density, low mass fibrous fuels such as paper waste and biomass. The burner includes a combustion chamber having a solid fuel and primary air nozzle attached to one end thereof for directing pulverized solid fuel and air into the combustion chamber. The solid fuel and primary air nozzle has a spinning mechanism for spinning the solid fuel and air into the combustion chamber in one direction of rotation. A secondary air input is provided for feeding secondary air into the combustion chamber and includes means to spin the secondary air from the secondary air input into the combustion chamber in a direction opposite in rotation to the direction of rotation of the solid fuel and primary air. A gas fuel input has a flame disk and is positioned to feed gas into the combustion chamber in the center portion of the solid fuel and primary air nozzle to create additional stability in the combustion of the solid fuel in the combustion chamber.
    Type: Grant
    Filed: December 12, 1983
    Date of Patent: January 8, 1985
    Inventors: David F. Brashears, Joseph T. Mollick
  • 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: 4333405
    Abstract: A burner for combustion of powdery fuels. The burner has a core-air tube with a centrically arranged ignition device, a dust tube surrounding the core-air tube, and a mantle-air tube which surrounds the dust tube and is provided with an axially displaceable twist blade ring or impeller, arranged at its air inlet, as well as a burner opening which widens conically toward the combustion chamber. A dust-ignition burner is arranged concentrically in a core-air tube, and comprises an ignition-dust tube arranged concentrically around an igniter, and a mantle-air tube which surrounds the ignition-dust tube for the ignition-dust flame and is provided with an axially displaceable twist blade ring or impeller, arranged at its air inlet, as well as a conically widening outlet. The conical angle of the dust-ignition burner outlet is equal to or greater than the conical angle of the outlet of the main burner. The dust-ignition burner outlet terminates before the beginning of the conical widening of the main burner.
    Type: Grant
    Filed: August 7, 1980
    Date of Patent: June 8, 1982
    Assignee: L. & C. Steinmuller GmbH
    Inventors: Sigfrid Michelfelder, Klaus Leikert
  • Patent number: 4201538
    Abstract: A burner for liquid fuels such as light, medium and heavy oil, in which a fuel supply pipe is concentrically located in an air supply pipe and partially enclosed by a sleeve carrying air. A spray diffuser and a twist-producing member encloses the fuel supply pipe upstream of the spray diffuser. The twist-producing member has a fixed blower wheel and receives combustion air from the periphery thereof. The combustion air quantity is regulatable upstream of the burner head as a function of the prevailing fuel flow. A space located between the twist-producing member and the air supply pipe, holds two additional air supply pipes. One of these additional air supply pipes, an innermost pipe, has an end cone directed towards the outside. Coaxially downstream from the twist-producing member enclosing the fuel supply pipe, there are two additional twist-producing members with opposite twist direction enclosing each other.
    Type: Grant
    Filed: December 22, 1977
    Date of Patent: May 6, 1980
    Assignee: Max Weishaupt GmbH
    Inventor: Hermann Kopp
  • Patent number: 4106890
    Abstract: An impeller comprising a pair of axially adjacent plate members. Each of the plate members is formed with a hub and a plurality of laterally spaced segments extending outwardly from the hub. The plate members are coaxially mounted on a burner nozzle guide tube, with the plate member nearest the nozzle outlet being fixed to the guide tube and the other plate member being rotatable about its central axis to regulate the free flow area between segments.
    Type: Grant
    Filed: March 7, 1977
    Date of Patent: August 15, 1978
    Assignee: The Babcock & Wilcox Company
    Inventors: John Arthur Fulmer, David Judson Walker
  • Patent number: 4105158
    Abstract: Preheating and warming apparatus for use with vehicles comprising an outer housing provided with a clean air inlet port, a clean air outlet port and an exhaust gas outlet port, an inner housing having the interior thereof divided by a partition into a clean air introducing chamber and a combustion chamber, a fan motor disposed in the clean air introducing chamber and mounting a combustion fan on one of two output shafts of the fan motor, a sucking fan mounted on the other output shaft of the fan motor and disposed in the vicinity of the clean air inlet port of the outer housing, fuel injection means secured to the partition wall, a baffle plate disposed adjacent to the fuel injection means in the combustion chamber, a coiled water heating tube disposed in the combustion chamber, and radiation fins secured to the outer peripheral surface of the portion of the inner housing defining the combustion chamber, said components constituting a combustor for effecting combustion of liquid fuel to generate heat, said he
    Type: Grant
    Filed: December 7, 1976
    Date of Patent: August 8, 1978
    Assignee: Hitachi, Ltd.
    Inventors: Nobutoshi Hasebe, Toshiyuki Itoh, Takashi Hashimoto
  • Patent number: 3932110
    Abstract: An apparatus comprising a number of rotatable vanes, situated around the periphery of an annular duct, which can be opened and closed so as to control the flow of gas entering the duct. The axis of rotation of the vanes is parallel with the axis of the duct. The vanes are divided into groups, each vane of a group being connected to another vane of that group and each group of vanes being connected to a common drive means so that rotation of the drive means causes the vanes to open or close in unison.
    Type: Grant
    Filed: September 12, 1974
    Date of Patent: January 13, 1976
    Assignee: Foster Wheeler Energy Corporation
    Inventor: Alistair Tobias Waddell