Wall Structure Patents (Class 122/235.12)
  • Patent number: 11143398
    Abstract: A boiler system includes a support construction and a furnace supported to the support construction at a vertically middle section of the furnace, the furnace being enclosed by water tube walls having two side walls and two end walls, a roof and a bottom, the side walls having a total height (H) from the bottom to the roof. Each of the two side walls has a vertical upper portion that extends from the roof to a level of thirty to seventy percent of the height (H), a lower portion that extends from the bottom to a level of thirty to seventy percent of the height (H) and has a vertical upper portion, and an in downward direction outwards bent intermediate portion at a level between the upper portion of the side wall and the vertical upper portion of the lower portion of the side wall.
    Type: Grant
    Filed: November 1, 2017
    Date of Patent: October 12, 2021
    Assignee: Sumitomo SHI FW Energia Oy
    Inventor: Pentti Lankinen
  • Patent number: 10704783
    Abstract: A high temperature fluid generator is configured to heat a fluid (e.g. water; thermal oil or the like) to a high temperature (e.g. greater than 250 degrees Fahrenheit or 120 degrees Celsius) using a fuel-burning furnace. The generator generally comprises a furnace module, wherein fuel is burned, and a convection module where the combustion gases are put in contact with a series of fluid-bearing convection tubes. The furnace module comprises a series of fluidly interconnected headers, some of which are also fluidly connected to the convection tubes in the convection modules. The various headers contribute to the overall structure of the generator. The convection tubes are arranged into at least two bundles which are movably mounted in the convection module of the generator such to be movable in and out of the convection module for inspection, cleaning, maintenance and/or repair.
    Type: Grant
    Filed: December 23, 2014
    Date of Patent: July 7, 2020
    Assignee: Thermodesign, Inc
    Inventors: Rejean Gauthier, Robert Audet
  • Patent number: 10634341
    Abstract: The present application provides a tangentially fired boiler. The tangentially fired boiler may include a combustion chamber and an overfire air system positioned about the combustion chamber. The overfire air system may include a number of overfire air windboxes positioned in a horizontal orientation.
    Type: Grant
    Filed: August 23, 2016
    Date of Patent: April 28, 2020
    Assignee: General Electric Technology GmbH
    Inventors: Todd D. Hellewell, Bryan Walter Mruk, Christopher David Siriani
  • Patent number: 9920955
    Abstract: A solar receiver includes: water jacket panels each having a light-receiving side and a back side with a watertight sealed plenum defined in-between; light apertures passing through the watertight sealed plenums to receive light from the light-receiving sides of the water jacket panels; a heat transfer medium gap defined between the back sides of the water jacket panels and a cylindrical back plate; and light channeling tubes optically coupled with the light apertures and extending into the heat transfer medium gap. In some embodiments ends of the light apertures at the light receiving side of the water jacket panel are welded together to define at least a portion of the light-receiving side. A cylindrical solar receiver may be constructed using a plurality of such water jacket panels arranged with their light-receiving sides facing outward.
    Type: Grant
    Filed: May 14, 2015
    Date of Patent: March 20, 2018
    Assignee: The Babcock & Wilcox Company
    Inventor: David T Wasyluk
  • Patent number: 9739539
    Abstract: A system for preheating a pressure vessel includes a throat including an area of excess heat and a dome having an area of deficient heat. The throat includes a conduit extending from a pressure vessel opening to the pressure vessel interior. A plenum is defined between the throat and a seal within the dome. The throat extends from the dome toward a dome floor. The floor is substantially perpendicular to the throat. A conduit is coupled to the plenum and channels a flow of purge fluid into the plenum wherein heat from the throat is transferred to the flow of purge fluid and carried by the flow of purge fluid into the area of deficient heat via a gap defined between the seal and the floor such that the flow of purge fluid reduces temperature differential stresses within the pressure vessel and purges the area of deficient heat.
    Type: Grant
    Filed: May 16, 2014
    Date of Patent: August 22, 2017
    Assignee: General Electric Company
    Inventors: James Michael Storey, Alex Clinton Solomon, Benjamin Campbell Steinhaus, Judeth Brannon Corry, Steven Craig Russell, Robert Henri Gauthier, Yasir Hafeez Abbasi, Lien-Yan Chen
  • Patent number: 9719696
    Abstract: A solar receiver configuration (receiver) adapted to include a plurality of receiver heat transfer passes. Each pass includes a plurality of panels. Further, each panel includes a plurality of tubes, tangentially arranged, vertically extending between horizontally placed lower and upper headers. The headers, which are pipe assemblies with closed ends, of adjacent panels are horizontally and vertically offset one to another to form a substantially continuous tube surface. Such continuous tube surface enables solar heating of the fluid flow therefrom in at least a parallel flow arrangement and a serpentine flow arrangement.
    Type: Grant
    Filed: June 12, 2014
    Date of Patent: August 1, 2017
    Assignee: ALSTOM Technology Ltd.
    Inventors: Christopher J. Lech, Ronald Girard Payne, John Tweedie, Gary Pashko, Apurba Kumar Das, Lin Deng, David McGrane, Pedro Inigo, Rahul Jayant Terdalkar
  • Patent number: 9599331
    Abstract: Embodiments of the invention provide a water-cooled column formed by side walls connected together to define an enclosed space, each side wall is formed of a water-cooled membrane wall, a working medium is passed through a tube of the water-cooled membrane wall from bottom to top, the water-cooled column comprising: a lower part having a cross section reduced segment, which has a cross section gradually reduced in a direction from bottom to top; and an upper part, wherein the upper part connects with the cross section reduced segment at a connection position, and a cross sectional area of the cross section reduced segment at the connection position is identical to a cross sectional area of the upper part at the connection position. Embodiments of the invention also provide a furnace for defining a reaction space, which comprises a water-cooled column defined as above disposed along a vertical direction therein.
    Type: Grant
    Filed: October 8, 2014
    Date of Patent: March 21, 2017
    Assignee: Institute of Engineering Thermophysics, Chinese Academy of Sciences
    Inventors: Qinggang Lv, Ming Gao, Dongyu Wang, Xiaofang Wang
  • Patent number: 9291344
    Abstract: A forced-flow steam generator includes first and second steam generator pipes which form a surrounding wall, wherein the first and second steam generator pipes are welded in a gas-tight fashion and are traversable by flow in a vertical direction. A passage collector is arranged within the surrounding wall, wherein the passage collector connects the first steam generator pipes with the second steam generator pipes. The first steam generator pipes are connected at an outlet side to an inlet side of the second steam generator pipes, wherein the second steam generator pipes are connected in series with the first steam generator pipes. Each of the second generator pipes has a restrictor device. Further, a power plant with a forced-flow steam generator is provided.
    Type: Grant
    Filed: June 15, 2011
    Date of Patent: March 22, 2016
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Joachim Brodeβer, Jan Brückner, Martin Effert, Joachim Franke, Tobias Schulze
  • Patent number: 8851023
    Abstract: A continuous steam generator with a combustion chamber having a number of burners for fossil fuel and an outside wall composed of steam generator pipes that are welded to each other gas-tight is provided. A vertical gas flue is connected downstream of the combustion chamber on the hot gas side in an upper area via a horizontal gas flue, wherein a part of the outside wall facing the vertical gas flue and below the horizontal gas flue is inclined inward and thus forms a nose projecting into the combustion chamber with the bottom of the adjacent horizontal gas flue. Support pipes are connected downstream of at least one part of the steam generator pipes of the nose at the upper end thereof on the flow medium side, wherein the support pipes are guided substantially vertically to the lower end of the nose.
    Type: Grant
    Filed: October 28, 2009
    Date of Patent: October 7, 2014
    Assignee: Siemens Aktiengesellschaft
    Inventors: Martin Effert, Andreas Schneider
  • Patent number: 8757103
    Abstract: A heat exchanger is manufactured from a single piece of heat-conducting material and comprises fins for guiding a fluid and for transferring heat between the fluid and the heat exchanger, wherein between the fins are provided transverse fins which extend in a direction substantially transversely of the fins over a distance which is less than the distance between the fins and in a direction substantially transversely of the flow direction of the fluid, wherein the transverse fins are arranged alternately close to or on mutually adjacent fins in order to cause a fluid flowing between the fins to follow a meandering path between the fins, wherein the lateral direction lies substantially perpendicularly of the fins.
    Type: Grant
    Filed: July 2, 2009
    Date of Patent: June 24, 2014
    Assignee: Inter-Gas Heating Assets B.V.
    Inventor: Peter Jan Cool
  • Publication number: 20140150734
    Abstract: There is provided an austenitic stainless steel tube containing, by mass percent, 14 to 28% of Cr and 6 to 30% of Ni, wherein the steel tube has a metal micro-structure, in which an average dislocation density, which is determined by XRD measurement using a Co tube, is 3.0×1014/m2 or higher, on the inner surface side of the steel tube. The crystal grain size of the steel tube is preferably 50 ?m or smaller. The steel tube of the present invention is suitable as a steel tube used in power-generating plants.
    Type: Application
    Filed: May 28, 2012
    Publication date: June 5, 2014
    Applicant: NIPPON STEET & SUMITOMO METAL CORPORATION
    Inventors: Yoshitaka Nishiyama, Mitsuharu Yonemura
  • Publication number: 20140083374
    Abstract: The invention refers to a forced flow steam generator (10) and to a method for its operation. The forced flow steam generator (10) has a combustion chamber (11) with a burner arrangement (20). A fuel (B) and a mixture (G) consisting of pure oxygen and flue gas (R) are fed into the combustion chamber (11) or to the burner arrangement (20) for combusting. A flue gas duct (27) is connected to the combustion chamber (11) in the flow direction (S) of the flue gas (R), and a flue gas passage (26) is connected to the flue gas duct. The flue gas (R) for the oxygen-flue gas mixture (G) is fed back from the flue gas passage (26) via a flue gas recirculation line (28). The forced flow steam generator (10) is operated in the so-called oxyfuel process. A plurality of auxiliary heating surfaces (35) are arranged in the flue gas duct (27) downstream of the burner arrangement (20).
    Type: Application
    Filed: December 2, 2011
    Publication date: March 27, 2014
    Applicant: ALSTOM TECHNOLOGY, LTD.
    Inventors: Gerhard Weissinger, Thoralf Berndt, Ralph Dobrowolski, Andreas Marquard
  • Publication number: 20140038115
    Abstract: The invention discloses a dense/dilute pulverized coal separator structure of a single-fireball octagonal direct-flow burner, of which a boiler body is provided with eight burner groups, each water cooled wall is provided with two burner groups respectively, each of the burner groups comprises multiple nozzles toward the same burner, and center lines of all nozzles on the eight burner groups form an imaginary tangent circle in a furnace along the same tangential direction.
    Type: Application
    Filed: February 16, 2012
    Publication date: February 6, 2014
    Inventors: Fei Chen, Jianwen Zhang, Kun Xiao, Jiangtao Li
  • Publication number: 20130327284
    Abstract: The invention relates to a steam generator (D1, D2) having a first passage, which is formed by one or more pipes (R1, R2) and through which a medium can be conducted in liquid and/or vapour form, and having a second passage (F1, F2), through which a hot gas can be conducted along the outer side of each of the pipes (R1, R2) which form the first passage. Each of the pipes (R1, R2), which form the first passage, of the steam generator (D1, D2) is surrounded by a pressure-resistant casing (M1, M2) which has a heat-insulating coating (W1, W2) on the inner side thereof and through the interior space of which the second passage (F1, F2) runs.
    Type: Application
    Filed: February 2, 2012
    Publication date: December 12, 2013
    Applicant: LINDE AKTIENGESELLSCHAFT
    Inventor: Hanno Tautz
  • Publication number: 20130306003
    Abstract: Bent-out wall in the region of a substantially rectangular burner opening (2), wherein the bent-out wall (1) is formed by tube walls (3) and the tube walls (3) consist of tube-fin-tube combinations welded in a gastight manner and the tubes (5) thereof are flowed through by a cooling medium, wherein at least part of the bent-out wall (1) along the two longitudinal sides (7) of the rectangular burner opening (2) is formed by means of prefabricated tube wall segments (4) and wherein the prefabricated tube wall segments (4) are machine-welded in the planar state at the workshop and are subsequently bent at the workshop to a wall bending radius (R) of 70-140 mm and a wall bending angle (W) of 110°-150°.
    Type: Application
    Filed: September 30, 2011
    Publication date: November 21, 2013
    Applicant: ALSTOM TECHNOLOGY, LTD.
    Inventors: Jens Eschenhagen, Leonhard Leuthel
  • Publication number: 20130306002
    Abstract: The erosion-prone sections of the tubes in a circulating fluidized bed boiler are provided with a locally thickened sidewall without forming discontinuities on the outer surface of the tubes. This can be accomplished, for example, by replacing the erosion prone portion of the tube with a section having a smaller inside diameter, but the same outside diameter, or by replacing the erosion prone portion of the tube with a section having a thicker sidewall, but the same inside diameter, and smoothing over the outside discontinuity with an alloy coating. A useful alloy coating is also disclosed which can be used for this and other applications.
    Type: Application
    Filed: July 26, 2013
    Publication date: November 21, 2013
    Applicant: ALSTOM Technology Ltd
    Inventor: Michael Walter SEITZ
  • Publication number: 20130276723
    Abstract: A ground supported single drum power boiler is described combining a refractory lined and insulated V-Cell floor; refractory lined and insulated combustion chamber; integrated fuel chutes configured to pre-dry wet solid fuel; top mounted fuel bin; internal chamber walls; configurable combustion air systems; and a back pass with after-burner ports and cross flow superheaters. The boiler can be configured in pre-assembled modules to minimize the field construction time and cost. An alternative embodiment is adaptable as a gasifier.
    Type: Application
    Filed: March 27, 2013
    Publication date: October 24, 2013
    Inventors: Daniel R. Higgins, Eugene Sullivan
  • Publication number: 20130263796
    Abstract: A high-temperature piping product is configured from a plurality of primary pipe members and a welding material. The primary pipe members are each made from an Ni-based forged alloy containing: Ni, Al, and at least one of Mo and W. The total content of the Mo and the W being 3-8 mass %. The Ni-based forged alloy exhibiting a ??-phase dissolution temperature of from 920 to 970° C., and the ?? phase being precipitated in 30 volume % or more in a temperature range of from 700 to 800° C. The welding material is made from an Ni-based cast alloy having a cast structure formed by welding. The Ni-based cast alloy containing: Ni, Al, and at least one of Mo and W, the total content of the Mo and the W being 9-15 mass %, the Ni-based cast alloy exhibiting a ??-phase dissolution temperature of from 850 to 900° C.
    Type: Application
    Filed: April 8, 2013
    Publication date: October 10, 2013
    Applicant: Hitachi, Ltd.
    Inventors: Shinya IMANO, Hiroyuki DOI, Jun SATO
  • Publication number: 20130199461
    Abstract: Tubular wall assembly (8) comprising a plurality of tubular conduits (10) in parallel arrangement interconnected to form a gastight structure, each tubular conduit (10) being connected on one end to a common distributor (12) and on another end to a common header (11), wherein through each conduit a flow path extends between the distributor and the header, wherein each flow path crosses a passage opening in a seat (21, 28, 43) for an insertable flow restrictor (22, 44), wherein for each conduit the wall assembly comprises an opening (17, 51) bordered by a collar (15, 42) with an open end in line with the seat, wherein the open end of the collar is closed by a cap (26, 35, 49).
    Type: Application
    Filed: February 17, 2011
    Publication date: August 8, 2013
    Inventors: Eckhard Friese, Thomas Paul Von Kossak-Glowczewski, Juergen Kowalow
  • Patent number: 8281750
    Abstract: A boiler furnace avoids NOx and increases thermal efficiency with a small boiler. The boiler furnace has an outer water wall and an inner water wall with flared top and bottom portions.
    Type: Grant
    Filed: April 29, 2009
    Date of Patent: October 9, 2012
    Inventor: Byung-Doo Kim
  • Patent number: 8089999
    Abstract: A pipe and method of use for deterring or encouraging the retention of slag or other material in the operating area of a metal processing system as desired. The deterring pipe(s) and the encouraging pipe(s) may be combined with other deterring pipe(s) and/or other encouraging pipe(s) in any combination as desired.
    Type: Grant
    Filed: November 1, 2006
    Date of Patent: January 3, 2012
    Assignee: AmeriFab, Inc.
    Inventor: Richard J. Manasek
  • Publication number: 20110290164
    Abstract: A steam generator includes a furnace configured and adapted to generate a stream of furnace exit gases from the combustion of municipal solid waste fuel. At least one superheater is disposed within an upper portion of the furnace or backpass. The superheater is configured and adapted to superheat fluids within the superheater by facilitating heat transfer between fluids within the superheater and furnace exit gases outside the superheater. At least one waterwall furnace platen is disposed within the furnace upstream from the superheater, the waterwall furnace platen is configured and adapted to lower furnace exit gas temperature at the superheater by facilitating heat transfer between fluids within the waterwall furnace platen and furnace exit gases outside the waterwall furnace platen.
    Type: Application
    Filed: August 8, 2011
    Publication date: December 1, 2011
    Applicants: Wheelabrator Technologies Inc., Riley Power Inc.
    Inventors: Arthur W. Cole, Robert Faia, Thomas Kelly, John Persson, Frank J. Zone, JR.
  • Publication number: 20110132281
    Abstract: Provided is a boiler structure with which, by reducing the pressure drop in boiler evaporation tubes correspondingly to the heat flux, which varies in accordance with the distance in the boiler height direction, it is possible to reduce auxiliary power for a water feed pump and so forth, in addition to improving the flow stability and the natural circulation characteristics. The boiler structure includes a number of boiler evaporation tubes that are arranged on a wall surface of a furnace and that form a furnace wall, water pumped into the boiler evaporation tubes being heated in the furnace during flowing inside the tubes to produce steam, wherein the boiler evaporation tubes are formed by connecting tubes of a plurality of types, in which tube wall thicknesses are adjusted on the basis of furnace heat flux such that the higher the furnace heat flux in a region is, the smaller the tube inner diameter becomes.
    Type: Application
    Filed: June 4, 2009
    Publication date: June 9, 2011
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Kazuhiro Domoto, Hiroshi Suganuma, Yuichi Kanemaki
  • Publication number: 20110120393
    Abstract: A steam generator includes a furnace configured and adapted to generate a stream of furnace exit gases from the combustion of municipal solid waste fuel. At least one superheater is disposed within an upper portion of the furnace or backpass. The superheater is configured and adapted to superheat fluids within the superheater by facilitating heat transfer between fluids within the superheater and furnace exit gases outside the superheater. At least one waterwall furnace platen is disposed within the furnace upstream from the superheater, the waterwall furnace platen is configured and adapted to lower furnace exit gas temperature at the superheater by facilitating heat transfer between fluids within the waterwall furnace platen and furnace exit gases outside the waterwall furnace platen.
    Type: Application
    Filed: February 7, 2011
    Publication date: May 26, 2011
    Inventors: Arthur W. Cole, Robert Faia, Thomas Kelly, John Persson, Frank J. Zone, JR.
  • Publication number: 20100300379
    Abstract: It is an object to reduce the burden of a welding operation in producing a boiler waterwall panel and to reduce the burden of maintaining a furnace housing using the boiler waterwall panels thereby to improve the operating rate of the boiler. In a boiler waterwall panel 80, a panel body 70 with water passages is constituted by a plurality of metal seamless finned single tubes 60 as constituent units integrally produced by a hot extrusion method, etc., and joined by welding tip ends of fin portions 62. On at least one surface side of the panel body 70, fusion-bonded coating 81 for frame-like edge portions and fusion-bonded coating 82 for inner region, of a corrosion resistant alloy are formed. The finned single tube 60 has a single tubular portion 61 for a cooling water passage and a pair of fin portions 62 extending in the tube axial direction at peripheral opposite sides of the tube, and the external surface of the transition portion 63 is formed into a concave surface having a curvature radius of 3 to 6 mm.
    Type: Application
    Filed: April 18, 2007
    Publication date: December 2, 2010
    Inventors: Kazunari Itai, Akihiro Takeya, Yoshinobu Sochi, Michio Tanabe, Yoichi Matsubara
  • Patent number: 7721679
    Abstract: An efficient high-temperature water vapor generator includes a combustion chamber and a surrounding structure, wherein a cavity is located therebetween. Water is pumped into the cavity at a location near a first end of the combustion chamber. Water is removed from the cavity at a location near a second end of the combustion chamber, opposite the first end. The water removed from the cavity is injected into the combustion chamber at a location near the first end. Fuel and air are also introduced into the combustion chamber at the first end. The fuel and air are ignited near the first end of the combustion chamber, thereby creating high-temperature water vapor, and pre-heating the water in the cavity surrounding the combustion chamber.
    Type: Grant
    Filed: September 28, 2005
    Date of Patent: May 25, 2010
    Assignee: Goodfield Energy Corporation
    Inventor: Aldon R. Reinhardt
  • Publication number: 20100064988
    Abstract: A steam generator, used in a helical coil type steam generator for a sodium-cooled fast reactor which has heat transfer tubes of a double-wall tube structure, with high heat transfer efficiency and a heat transfer tube damage detection unit that can detect on-line in real-time whether the heat transfer tube is damaged or not. The heat transfer tube of a steam generator for a sodium-cooled fast reactor, includes an inner tube formed with a first material; an outer tube formed with a second material that is in close contact with the inner tube and which has a thermal expansion coefficient less than that of the first material; and a plurality of helium flow grooves formed between the inner tube and the outer tube along a lengthwise direction of the heat transfer tube for flowing helium gas.
    Type: Application
    Filed: March 27, 2009
    Publication date: March 18, 2010
    Inventors: Ho-Yun NAM, Byoung-Hae CHOI, Byung-Ho KIM, Jong-Man KIM
  • Patent number: 7574981
    Abstract: An apparatus and method for improving the longevity of a cooling tube in a fire tube boiler. The apparatus comprises a ferrule inserted within the cooling tube end and an internal overlay, with the ferrule and internal overlay arranged to provide a smooth, continuous, and diverging passage that reduces turbulence for a heated fluid flowing therethrough, thus preventing the overheating of the tube wall in the highly turbulent area. The internal overlay may be a weld overlay of a corrosion-resistant material that is deposited in a band about the inner wall of the cooling tube, the overlay having an annular inner recess receiving the end of the ferrule. The combination of ferrule and internal overlay also reduces the sharp gradient in temperature that is encountered when the heated fluid enters the relatively cool tube end, thus reducing film boiling, reducing cracking of the tube end, and enhancing corrosion resistance.
    Type: Grant
    Filed: October 5, 2006
    Date of Patent: August 18, 2009
    Assignee: Citgo Petroleum Corporation
    Inventor: Clinton J. Schulz
  • Patent number: 7533632
    Abstract: A gravity feed, natural circulation boiler for an SAGD process using low quality feedwater for carbonatious material recovery, has a large diameter steam drum with downcomers. A furnace of the boiler has individually replaceable membrane wall modules, each with upper and lower headers and membrane roof, wall and floor parts connected to the drum and defining a fire box having an inlet end and an outlet end. The furnace includes a membrane front wall connected to the drum with a windbox upstream of the front wall. Burners at the inlet end of the firebox heat the firebox and riser pipes are connected between the steam drum and the upper header for supplying steam to the steam drum when the firebox in heated, the downcomer pipes being connected to the lower header for supplying water from the stream drum under gravity feed so that each module defines a single circuit.
    Type: Grant
    Filed: May 1, 2007
    Date of Patent: May 19, 2009
    Assignee: Babcock & Wilcox Canada, Ltd.
    Inventors: Bryan B. Stone, Jonathan D. Fleming
  • Patent number: 7516719
    Abstract: A steam generator comprising a combustion chamber having funnel-shaped side walls in the bottom area thereof and an encircling wall formed from a plurality of steam generator pipes through which a flow medium can flow, wherein there area as little temperature differences as possible in the flow medium at the output of the steam generator pies. The steam generator pipes are, more particularly, arranged in the lower section forming the funnel-shaped side walls such that they are exposed to heat in as homongenous a manner as possible. According to the invention, the diameter of a number of steam generator pipes in the region of the funnel shaped side walls is different from that in the region of the encircling wall.
    Type: Grant
    Filed: October 26, 2004
    Date of Patent: April 14, 2009
    Assignee: Siemens Aktiengesellschaft
    Inventors: Rudolf Kral, Andre Schrief, Frank Thomas
  • Patent number: 7509928
    Abstract: Suspended steam boiler, in which the steam boiler lower portion (5), having inclined tubes, is suspended from the steam boiler upper portion (1), having vertical tubes exclusively from the vertical tubes of the latter without additional external tensile or support elements. (FIG.
    Type: Grant
    Filed: February 1, 2007
    Date of Patent: March 31, 2009
    Assignee: Hitachi Power Europe GmbH
    Inventors: Martin Becker, Vu-Tam Lai
  • Patent number: 7228822
    Abstract: An efficient high-temperature water vapor generator is used to de-contaminate soil. The vapor generator includes a combustion chamber and a surrounding structure, wherein a cavity is located therebetween. Water is routed through the cavity and into the combustion chamber, where water vapor and heat are generated in the presence of fuel, ignition and air. The generated heat pre-heats the water in the cavity, thereby creating an efficient system. The water vapor is forced into a vapor tube (which has openings for emitting the vapor), thereby heating the vapor tube to temperatures of 800° F. or greater. A soil tube having lifting paddles located therein surrounds the vapor tube. Contaminated soil enters one end of the soil tube. The soil tube is rotated, thereby moving the contaminated soil into contact with the vapor tube (decontaminating the soil). The lifting paddles move the soil toward the second end of the rotating soil tube.
    Type: Grant
    Filed: October 14, 2003
    Date of Patent: June 12, 2007
    Assignee: Goodfield Energy Corporation
    Inventor: Aldon R. Reinhardt
  • Patent number: 6793013
    Abstract: A vertical polygonal heat exchange chamber includes an upper opening, a lower opening, and an enclosure formed between the upper and lower openings. The enclosure includes at least one tapered portion that narrows in a direction toward one of the openings. The tapered portion is lined with N first water tube panels arranged adjacent to and alternately with N second water tube panels, where N is an integer greater than two. Each of the first and second water tube panels is angled inwardly from the widest part of the tapered portion toward the interior of the enclosure, with each of the first water tube panels being angled inwardly to a greater degree than each of the second water tube panels.
    Type: Grant
    Filed: January 9, 2003
    Date of Patent: September 21, 2004
    Assignee: Foster Wheeler Energy Corporation
    Inventor: Ponnusami K. Gounder
  • Publication number: 20040123813
    Abstract: The invention relates to a black liquor gun (4) for feeding black liquor into a recovery boiler (1), comprising a nozzle (11) to be inserted into a furnace (2). Inside the black liquor gun (4) there is a flow guidance element (16), which provides an annular flow channel between the outer wall (14) and the flow guidance element (16).
    Type: Application
    Filed: October 30, 2003
    Publication date: July 1, 2004
    Applicant: KVAERNER POWER OY
    Inventors: Kari Esa Haaga, Seppo Juhani Puhtila
  • Patent number: 6715450
    Abstract: A continuous-flow steam generator includes a combustion chamber with evaporator tubes for fossil fuel. The combustion chamber is followed on the fuel-gas side, via a horizontal gas flue, by a vertical gas flue. When the continuous-flow steam generator is in operation, temperature differences between the exit region of the combustion chamber and the entry region of the horizontal gas flue are to be particularly low. For this purpose, of a plurality of evaporator tubes capable of being acted upon in parallel by a flow medium, a number of the evaporator tubes are led through the combustion chamber before their entry into the containment wall of said combustion chamber.
    Type: Grant
    Filed: September 28, 2001
    Date of Patent: April 6, 2004
    Assignee: Siemens Aktiengesellschaft
    Inventor: Eberhard Wittchow
  • Patent number: 6578529
    Abstract: The present invention relates to an arrangement for introducing black liquor into a furnace of a recovery boiler, said arrangement comprising an elongated tube having an interior surface and an exterior surface, through which tube the black liquor being fed into the furnace is supplied, whereby the black liquor is taken into contact with said interior surface prior to being sprayed into the furnace. The interior surface of said elongated tube is provided with heat transfer elements and surfaces, such as fins or grooves. The heat transfer element or surface increases the heat conductivity between the tube and the black liquor above the conductivity achieved with a normal tube passage.
    Type: Grant
    Filed: October 17, 2001
    Date of Patent: June 17, 2003
    Assignee: Andritz Oy
    Inventors: Antti Hytönen, Pentti Piilonen, Esa Vakkilainen
  • Patent number: 6557499
    Abstract: The steam generator has a combustion chamber for fossil fuel. A vertical gas flue is arranged downstream of the combustion chamber on a heating-gas side and connected via a horizontal gas flue. The structure requires especially little outlay in terms of manufacture and installation. The combustion chamber has a number of burners which are disposed at the same level with the horizontal gas flue.
    Type: Grant
    Filed: December 11, 2000
    Date of Patent: May 6, 2003
    Assignee: Siemens Aktiengesellschaft
    Inventors: Joachim Franke, Rudolf Kral
  • Patent number: 6491000
    Abstract: A tube wall, division wall, or wing wall section (10) for a circulating fluidized bed boiler with improved erosion resistant characteristics has a reduced diameter tube section (40) adjacent the refractory covered by an abrasion resistant refractory tile (60). The refractory tile (60) is mounted to the reduced diameter tube section (40) with the upper edge of the refractory tile outside of or not extending beyond a solids fall line of solids in the fluidized bed to eliminate exposed discontinuities.
    Type: Grant
    Filed: November 6, 2001
    Date of Patent: December 10, 2002
    Assignee: The Babcock & Wilcox Company
    Inventors: David J. Walker, Donald L. Wietzke, Gary L. Anderson, Richard F. Romansky, Jr.
  • Patent number: 6250257
    Abstract: A once-through steam generator having a combustion chamber. A containing wall of the combustion chamber is formed from vertically disposed evaporator tubes welded to one another in a gas-tight manner. The combustion chamber is to be capable of being used safely and reliably in a pressure range of between about 200 bar and 221 bar, while, moreover, a particularly high efficiency is to be achieved. For this purpose, according to the invention, a mass flow density m of a flow medium has the following relationship m=200+8.42 ·1012·q3[d/(d−2s)]s2·Tmax−5 in the evaporator tubes. In this case, q is the heat flow density acting on the evaporator tubes, Tmax is an admissible maximum temperature characteristic of the tube material, d is the outside diameter of the evaporator tubes and s is the wall thickness of the evaporator tubes.
    Type: Grant
    Filed: May 6, 1999
    Date of Patent: June 26, 2001
    Assignee: Siemens Aktiengesellschaft
    Inventors: Wolfgang Kastner, Wolfgang Köhler, Eberhard Wittchow
  • Patent number: 6205634
    Abstract: An improved floor for a recovery boiler furnace having a flat floor has a number of tubes in the floor immediately adjacent each of the sidewalls of the furnace oriented at an oblique angle to horizontal. A method of replacing the floor is provided as well.
    Type: Grant
    Filed: March 30, 2000
    Date of Patent: March 27, 2001
    Assignee: The Babcock & Wilcox Company
    Inventors: Jerry D. Blue, James D. Fleming