Drums And Couplings Patents (Class 122/365)
  • Patent number: 8720735
    Abstract: A pressure vessel, including: a body portion; and an inclined nozzle projecting from the body portion along an axis inclined relative to an inner surface of the body portion, wherein: a through hole of a circular section is formed through both the body portion and the inclined nozzle. At an intersecting portion between the inner surface of the body portion and a surface surrounding the through hole, there are formed round portions. The radius of each of the round portions at two positions in a major axis direction is smaller than the radius of each of round portions.
    Type: Grant
    Filed: October 4, 2011
    Date of Patent: May 13, 2014
    Assignee: Kobe Steel, Ltd.
    Inventors: Susumu Terada, Tatsuo Nishihara, Yukihiro Fukada
  • Publication number: 20110265735
    Abstract: A boiler structure that allows for an appropriate flow-rate distribution of an internal fluid to multiple divided furnace wall surfaces (water-wall) without excessive pressure loss so as to reduce the pressure loss (friction loss) occurring between furnace inlet headers and outlet headers is provided. In a boiler structure having a furnace water-wall (4) formed of multiple boiler evaporation tubes (3) disposed on a wall surface of a furnace and configured to generate steam by heating water inside the furnace when the water pressure-fed to the boiler evaporation tubes (3) flows inside the tubes, the boiler structure includes orifices (22), for an internal fluid, provided in inlet connection tubes (20) that guide the water to inlet headers (21) of furnace walls obtained by dividing the furnace water-wall (4) into multiple parts, and orifices (23) provided in nozzle stubs that guide the water from the inlet headers (21) to the boiler evaporation tubes (3).
    Type: Application
    Filed: July 2, 2009
    Publication date: November 3, 2011
    Inventors: Hiroshi Suganuma, Yuichi Kanemaki, Kazuhiro Domoto
  • Publication number: 20110174240
    Abstract: A method of controlling stress in a boiler pressure vessel comprises limiting the diameter of a drum (10) of the boiler pressure vessel and preheating at least a portion of the wall (12) of the drum (10). Limiting the diameter of the drum (10) allows pressure in the drum (10) to be increased for a given mechanical stress. Furthermore, preheating the wall (12) of the drum (10) reduces peak thermally induced stresses in a material from which the drum (10) is fabricated.
    Type: Application
    Filed: January 20, 2010
    Publication date: July 21, 2011
    Inventors: Donald W. Bairley, Wesley P. Bauver, II, Francois Droux, Ian J. Perrin, Christoph Ruchti, Falk Ruecker, Glenn T. Selby
  • Patent number: 5176109
    Abstract: A pressurized boiler assembly (e.g. with a circulating fluidized bed combustion chamber), including a pressure vessel pressurized to about 7-30 bar, has a minimum height, minimum number of through extending openings in the pressure vessel, and maximum accessibility to the controls and adjustments for the boiler. A steam drum is mounted by a flange joint above the boiler so that it extends horizontally, with the main body of the steam drum with the pressure vessel, but with a first end of the steam drum exteriorly of the vessel. The control and adjustment elements for the boiler, such as safety valves, pressure indicators, and water gauges, are mounted to the first end of the steam drum, exteriorly of the pressure vessel. A superheater having a discharge conduit is also mounted within the vessel below the steam drum, and the first end of the steam drum and the superheater discharge conduit are essentially the only elements associated with the boiler water and steam system passing through the pressure vessel.
    Type: Grant
    Filed: February 18, 1992
    Date of Patent: January 5, 1993
    Assignee: A. Ahlstrom Corporation
    Inventor: Folke Engstrom
  • Patent number: 4844274
    Abstract: A pressure vessel assembly includes a pressure vessel with a vessel wall having a connection stub with a stub wall. A thermal protector for the connection stub in the form of a first tube extends substantially parallel to the stub wall. The first tube has an inner surface, one end disposed at the stub wall and another free end extending into the pressure vessel. Brackets are disposed on the inner surface of the tube between the other free end and the stub wall. A second tube extends into the connection stub beyond the one end of the first tube. The second tube has slits formed therein defining prongs therebetween connected to the brackets.
    Type: Grant
    Filed: June 3, 1988
    Date of Patent: July 4, 1989
    Assignee: Siemens Aktiengesellschaft
    Inventor: Zvonimir Sterk
  • Patent number: 4621681
    Abstract: A system for recovering waste heat from a stream of heated gas is disclosed. The system includes a convection heat transfer chamber, a boiler tank, and a plurality of heat pipes thermally interconnecting the convection heat transfer chamber with the boiler tank. Each of the heat pipes includes an evaporator section which is disposed in heat transfer relation with a stream of heated gas flowing through the convection heat transfer chamber, and a condenser section disposed in heat transfer relation with a volume of water disposed within the boiler tank. The evaporator sections and condenser sections are totally enclosed within the convection heat transfer chamber and boiler tank, respectively, and are connected in closed cycle fluid communication with each other.
    Type: Grant
    Filed: May 19, 1983
    Date of Patent: November 11, 1986
    Assignee: Q-dot Corporation
    Inventor: George M. Grover
  • Patent number: 4593653
    Abstract: Distributor for two-phase mixtures, including a distributor drum, a feed tube leading into the distributor drum in a given direction, a plurality of outlet tubes leading from the distributor drum at an angle to the given direction, and a flat baffle plate being disposed in the distributor drum at a right angle to the given direction, the baffle plate having an edge leading symmetrically and smoothly to the outlet tubes.
    Type: Grant
    Filed: August 31, 1984
    Date of Patent: June 10, 1986
    Assignee: Kraftwerk Union Aktiengesellschaft
    Inventors: Egon Schneider, Wolfgang Kohler
  • Patent number: 4444157
    Abstract: In boilers, process tubes are suspended by means of vertical tubular supports that are in thermal contact with and attached to the metal roof casing of the boiler and the upper bend portions of the process tubes. The tubular supports have a liquid sealed within the support so that under conditions the liquid refluxes thereby rejecting heat to the atmosphere above the roof casing of the boiler.
    Type: Grant
    Filed: December 10, 1982
    Date of Patent: April 24, 1984
    Assignee: Exxon Research and Engineering Co.
    Inventor: Arthur C. Worley
  • Patent number: 4429663
    Abstract: In a reactor pressure vessel for a boiling-water reactor having a feedwater inlet nozzle, the combination includes a heat protective pipe received in the nozzle and having an extension projecting therefrom, a feedwater sparger ring disposed in a given plane, and means for connecting the feedwater sparger ring to the heat protective pipe, the connecting means includes an elbow extending angularly from the given plane and connecting the feedwater sparger ring to the extension of the heat protective pipe.
    Type: Grant
    Filed: May 15, 1981
    Date of Patent: February 7, 1984
    Assignee: Kraftwerk Union Aktiengesellschaft
    Inventors: Heinrich Dorner, Gunter Rabe
  • Patent number: 4262635
    Abstract: A boiler having an elevated water supply, steam collector drum with a plurality of depending heat exchange tubes, the tubes being connected to the drum to provide a supply path for water from the boiler drum and a return path for steam and water to the boiler drum, the tubes being connected to a single drum facilitating the removal and replacement of defective tubes and servicing of the drum.
    Type: Grant
    Filed: June 21, 1979
    Date of Patent: April 21, 1981
    Inventors: Hector A. Dauvergne, C. William Moore
  • Patent number: 4168071
    Abstract: In an arrangement for feeding a fluid at a given temperature into a vessel containing fluid at a different temperature from an inlet pipe through an inlet nozzle to feedfluid distribution means in the vessel, a removable thermal isolator arrangement is provided. Spaced concentric sleeves form a series of fluid spaces which thermally insulate the inner surface of the nozzle from the feedfluid and leakage feedfluid is directed away from the nozzle whereby thermal cycling of the inner surface of the nozzle is minimized to eliminate cracking thereof.
    Type: Grant
    Filed: March 17, 1978
    Date of Patent: September 18, 1979
    Assignee: General Electric Company
    Inventors: Jerome Jacobson, Charles W. Dillmann
  • Patent number: 4117885
    Abstract: A heat exchange vessel has a plurality of tubes disposed therein. A tube sheet section in the vessel has a plurality of ports formed therein for receiving one end of each of said tubes, and at least one channel is formed in said first tube sheet section for communicating with said ports. An additional tube sheet section disposed in said vessel has a plurality of ports formed therein for receiving the other ends of said tubes and at least one channel formed in said additional tube sheet section is provided for communicating with said latter ports. Means is provided for introducing a heat exchange fluid to the channel associated with one of said tube sheet sections for passing through its respective ports through said tubes. Likewise means is provided for collecting the fluid from the channel associated with the other tube sheet section for passing the fluid externally of the vessel.
    Type: Grant
    Filed: August 11, 1975
    Date of Patent: October 3, 1978
    Assignee: Foster Wheeler Limited
    Inventors: James H. D. Nickerson, Robert R. Steel