Indirectly Heated Patents (Class 122/483)
  • Patent number: 10502493
    Abstract: The present application provides a heat exchanger for exchanging heat between two fluid flows in cross-flow arrangement. The heat exchanger includes at least one heat exchanging module including a first heat exchanging component and a second heat exchanging component. The first heat exchanging component including a fluid inlet header, a fluid outlet header, and at least one heat exchanging passageway defining a first tube-side fluid flow path of a first portion of a fluid in a first direction. The second heat exchanging component including a fluid inlet header, a fluid outlet header, and at least one heat exchanging passageway defining a second tube-side fluid flow path in a second direction for an additional portion of the fluid, wherein the first direction is opposed to the second direction. The opposing first tube-side fluid flow path and the second tube-side fluid flow path equalizing the temperature distribution over the cross-section of a cross-flow fluid exiting the module.
    Type: Grant
    Filed: November 22, 2016
    Date of Patent: December 10, 2019
    Assignee: General Electric Company
    Inventor: Sebastian Walter Freund
  • Patent number: 9534779
    Abstract: A tube and shell steam generator in which a series of rods having a diameter substantially equal to that of the heat exchange tubing in the tube bundle are placed on either side of the tube lane to buffer the flow in the tube lane from the heat exchange tubes to attenuate turbulent forces on the first several rows of heat exchange tubes adjacent to the tube lane.
    Type: Grant
    Filed: August 4, 2011
    Date of Patent: January 3, 2017
    Assignee: Westinghouse Electric Company LLC
    Inventor: Robert M. Wepfer
  • Patent number: 9297592
    Abstract: One embodiment of a moisture separator reheater includes: heater headers that supply the heating fluid to heat transfer tube groups for heat exchange with the steam; partition plates that guide the steam from a moisture removal section to the heat transfer tube group and then to the heat transfer tube group. The heat transfer tube groups each includes a plurality of heat transfer tubes each having a forward passage part, a backward passage part, and a bent tube part. The forward and the backward passage parts extend in a longitudinal direction of a body drum and the bent tube part connects the forward and the backward passage parts. The bent tube pipe is provided outside end plates.
    Type: Grant
    Filed: August 30, 2013
    Date of Patent: March 29, 2016
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Shogo Kurihara, Koichi Yoshimura
  • Publication number: 20150122201
    Abstract: A steam boiler has at least one water and/or steam conveying element and at least one radiation element, which is an un-cooled element, arranged in the flow of hot flue gases, such that it is convectively heated by the flue gases. The radiation element is located at a pre-determined distance from the at least one water and/or steam conveying element, wherein the pre-determined distance is arranged such that the flow of hot flue gases between the radiation element and the water and/or steam conveying element is unhindered, and such that the water and/or steam conveying element is heated by heat radiation from the radiation element.
    Type: Application
    Filed: December 19, 2012
    Publication date: May 7, 2015
    Inventor: Bo Jonsson
  • Publication number: 20150007781
    Abstract: The present disclosure relates to a system for producing high pressure steam from low quality feedwater for a designated process. The system includes a first closed loop in fluid communication with a boiler and a heat exchanger assembly. A first fluid flows through the first closed loop, and is of acceptable quality for use in a boiler. Heat from the boiler is transferred to a second loop through the heat exchanger assembly. The second loop includes the low quality feedwater, which is converted to high pressure steam. The high pressure steam produced from the low quality water can be used in the designated process. This reduces corrosion/downtime in the boiler that might otherwise occur if the low quality water was directly heated by the boiler.
    Type: Application
    Filed: June 6, 2014
    Publication date: January 8, 2015
    Inventors: Donald E. RYAN, James S. KULIG, Larry A. PIERSON
  • Patent number: 8661821
    Abstract: The present invention relates to a process for reducing coal consumption in coal fired plant with fluidized-bed drying, namely a fluidized-bed drying system is provided between a coal powder bunker as well as a weighing belt and a coal grinding mill of the prior coal fired boiler generating set, and superheated steam which has done partial work is extracted from an steam turbine and used as a drying medium, moisture contained in the coal powder is evaporated with sensible heat and latent heat of the superheated steam, water resulted from the condensation of the superheated steam is fed into a deaerator of the steam turbine via a condensate pump for recirculation. The present invention has advantages of reducing coal consumption and saving coal, recovering residual heat, reducing emission of carbon dioxide and adopting to the national industrial policy on energy saving and emission reduction.
    Type: Grant
    Filed: March 3, 2011
    Date of Patent: March 4, 2014
    Assignees: Tianhua Institute of Chemical Machinery and Automation, National Engineering Technology Research Center of Drying Technology & Equipment, Lanzhou Ruide Drying Technology Co., Ltd.
    Inventors: Xu Zhao, Maikui Zhang, Yan Dou, Yongzhong Jiang, Jinwen Shi
  • Publication number: 20130202276
    Abstract: A superheated-steam heating nozzle is provided that includes: first-fourth steam pipes concentrically disposed from inside to outside; an outlet connection is provided to the outlet side of the superheated-steam heating nozzle and receives steam from the first steam pipe; a blow-out nozzle is connected to the outlet connection; multiple electric heaters disposed in the gap between the second steam pipe and the third steam pipe and whose sealed sections at the tips traverse a temperature-rise-prevention section and protrude towards the superheated-steam heating nozzle; a first loop-back section on the outlet side connects the gap between the third steam pipe and the fourth steam pipe with the gap between the first steam pipe and the second steam pipe; and a second loop-back section on the inlet side connects the gap between the first steam pipe and the second steam pipe with the inside of the first steam pipe.
    Type: Application
    Filed: December 24, 2010
    Publication date: August 8, 2013
    Applicant: Masdac Co., Ltd.
    Inventors: Fumiharu Masuda, Shuuichi Sanda, Takeshi Hayano, Tadashi Yamamoto, Masanori Arakawa
  • Publication number: 20130000567
    Abstract: There are formed inside a casing, a steam receiving chamber, a supply manifold chamber, a moisture separating chamber, a heating chamber adjacent to the steam receiving chamber in an axial direction and housing a heat exchanger tube group, and a collection manifold chamber communicating with the heating chamber and adjacent to an upper part of the steam heating chamber. The steam receiving chamber and the partition panel are separated by a transverse partition panel which extends in a vertical direction and through which an end of the heat exchanger tube group in the axial direction penetrates, and a shroud that shrouds the end of the heat exchanger tube group penetrating the transverse partition panel. The steam receiving and the collection manifold chambers are separated by a ceiling panel. A panel bonded to the ceiling panel, the transverse partition panel, and the shroud is provided in the steam receiving chamber.
    Type: Application
    Filed: December 28, 2011
    Publication date: January 3, 2013
    Inventors: Kotaro MACHII, Noriko Tomii
  • Patent number: 8261700
    Abstract: Process for the production of ammonia from a hydrocarbon feedstock all steam produced in the waste heat boilers of the reforming and ammonia section of the plant is superheated in one or more steam superheaters located downstream the ammonia converter in the ammonia section of the plant. There is no need for steam superheater (s) in the reforming section of the plant to cool the synthesis gas. A steam superheater for use in the process is also provided. The superheater comprises two compartments in which the first and second compartments are connected in series with respect to the steam flow and in parallel with respect to the process gas flow.
    Type: Grant
    Filed: June 17, 2009
    Date of Patent: September 11, 2012
    Assignee: Haldor Topsoe A/S
    Inventors: Henrik Otto Stahl, Pat A. Han
  • Patent number: 7993426
    Abstract: In a moisture separator, a manifold that communicates with a steam inlet is disposed in a shell. A plurality of blowout outlets for steam is provided on a side of the manifold. A first support plate and a lower support frame are fixed to a lower part in the shell to compart a steam drift space and a drain path. A moisture separating element is provided corresponding to the manifold, and steam from which moisture is removed by the moisture separating element is heated by a group of heating tubes to flow as high-temperature reheat steam to the steam outlet. The moisture is led from the drain opening through the drain path to the drain outlet. A blocking plate blocks a part of the drain opening.
    Type: Grant
    Filed: January 10, 2007
    Date of Patent: August 9, 2011
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Issaku Fujita, Nobuki Uda, Jiro Kasahara
  • Publication number: 20110005471
    Abstract: A moisture separator reheater (100) includes a shell body (111) having provided therein a steam receiving chamber (111a) having steam receiving openings (112a, 112b) for receiving steam (1), a supply manifold chamber (111b) communicating with the steam receiving chamber (111a), a moisture separation chamber (111c) communicating with the supply manifold chamber (111b) and separating moisture from the steam (1), a heating chamber (111d) communicating with the moisture separation chamber (111c) and heating the steam (1), and a collection manifold chamber (111e) being disposed adjacent to the steam receiving chamber (111a), communicating with the heating chamber (111d), and having steam discharge openings (120a to 120c) for discharging the steam (1). The moisture separator reheater (100) further includes heat-conduction reducing means for reducing heat conduction between the adjacent sections respectively of the steam receiving chamber (111a) and the collection manifold chamber (111e) of the shell body (111).
    Type: Application
    Filed: September 3, 2008
    Publication date: January 13, 2011
    Applicant: MITSUBISHI HEAVY INDUSTRIES ,LTD.
    Inventors: Issaku Fujita, Teruaki Sakata
  • Patent number: 7857895
    Abstract: A hygroscopic moisture separating and heating apparatus (20) comprises a main body container (1) having a cylindrical shape, a partition plate (5) provided to define a space together with an inner circumferential face of the main body container (1) and configured to divide the internal space of the main body container (1) into a lower temperature area (30) and a higher temperature area (31), a steam inlet (6) provided to the lower temperature area (30) of the main body container (1), a steam outlet (7) provided to the higher temperature area (31) of the main body container (1), a hygroscopic moisture separator (8) located in the lower temperature area (30) of the main body container (1), and a U-shaped pipe (2) through which heated steam for heating the steam to be heated is fed. The U-shaped pipe includes an advancing part (21), a retracting part (22), and a U-shaped part (23) connecting the advancing part (21) with the retracting part (22).
    Type: Grant
    Filed: August 18, 2005
    Date of Patent: December 28, 2010
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Shunji Kawano, Koichi Yoshimura, Takafumi Kamada, Tatsuya Okihara, Hiroshi Yamaguchi
  • Patent number: 7640749
    Abstract: Contrasted to the prior art, the present invention presents a path for the cycle steam having the fewest possible changes in direction to minimize parasite pressure losses. This invention accommodates proportioning the flow areas of the moisture separator—reheater(s) assembly to optimize performance of extracting the maximum energy from the cycle steam and in view of the economics of first cost and operating cost. The reheater tubes are straight, not U-tubed, and sloped towards the reheat steam condensate discharge. It utilizes an internal baffle in the reheating steam manifold, features which would mitigate tube binding, steam distribution to the tube bundles, flow oscillations, etc. which are expensive and difficult to alleviate.
    Type: Grant
    Filed: February 16, 2006
    Date of Patent: January 5, 2010
    Inventor: Hrant H. Yousoufian
  • Patent number: 7549400
    Abstract: A method of heating process streams fed to a boiler incorporating an oxygen transport membrane device that includes an oxygen-containing stream and a boiler feed water stream. The membrane device separates oxygen to support combustion of a fuel and generate heat to raise the steam. Heat is recovered and process streams are heated by separately heating portions of the oxygen-containing stream and the boiler feed water stream with a retentate stream produced from the oxygen separation and a flue gas stream generated from the combustion. The flow rate of the portion of the oxygen-containing stream heated by the retentate stream is greater than that heated by the flue gas stream to help minimize heat transfer area and thus, fabrication costs. Also, water is condensed from the flue gas stream during the heat exchange involved in the heat recovery to increase thermodynamic efficiency.
    Type: Grant
    Filed: December 5, 2006
    Date of Patent: June 23, 2009
    Assignee: Praxair Technology, Inc.
    Inventors: Vijayaraghavan Srinivasan Chakravarthy, Bart A. van Hassel, M. Mushtaq Ahmed
  • Patent number: 7213541
    Abstract: A method and apparatus for providing steam for a test chamber is provided. The apparatus includes a heating element contained within a vessel which is fluid communication with an exterior reservoir wherein the heating element provides heat to generate steam from the water entering the vessel from the reservoir. The method for generating steam includes providing a chamber configured to contain a fluid insetting water into the chamber from a reservoir external from the chamber, controlling an amount of water inlet into the reservoir substantially equalizing the water level in the reservoir with the water level in the chamber. The method also includes heating the water in the chamber to turn at least some of the water into steam and venting at least some of the steam out of the chamber.
    Type: Grant
    Filed: August 29, 2003
    Date of Patent: May 8, 2007
    Assignee: Lunaire Limited
    Inventors: Richard M. Powell, Bruce W. Hess
  • Patent number: 6886501
    Abstract: An apparatus for heating steam formed from cooling water in a heat exchanger for hot gas, having a super heater arranged in the heat exchanger vessel, a process for heating steam performed in such an apparatus, and a process for gasification of a hydrocarbonaceous feedstock having such a process for heating steam.
    Type: Grant
    Filed: May 15, 2002
    Date of Patent: May 3, 2005
    Assignee: Shell Oil Company
    Inventors: Sjoerd Bosch, Franciscus Gerardus Van Dongen, Johannes Didericus De Graaf
  • Patent number: 6840199
    Abstract: A process for heating steam, in which steam is obtained by indirect heat exchange between liquid water and a hot gas; (b) the steam obtained in step (a) is heated by indirect heat exchange with the partly cooled hot gas obtained in step (a); and (c) additional water is added to the steam obtained in step (a) prior to or during heating the steam in step (b).
    Type: Grant
    Filed: May 18, 2001
    Date of Patent: January 11, 2005
    Assignee: Shell Oil Company
    Inventors: Franciscus Gerardus Van Dongen, Johannes Didericus De Graaf
  • Patent number: 6766772
    Abstract: An apparatus for heating steam formed from cooling water in a heat exchanger for hot gas, having a superheater arranged in the heat exchanger vessel; a process for heating steam performed in such an apparatus; and a process for gasification of a hydrocarbonaceous feedstock involving such a process for heating steam.
    Type: Grant
    Filed: November 18, 2002
    Date of Patent: July 27, 2004
    Assignee: Shell Oil Company
    Inventors: Franciscus Gerardus Van Dongen, Johannes Didericus De Graaf
  • Publication number: 20040022724
    Abstract: A method is provided to inject liquid water into the normal stream of fuel, superheated air and superheated steam entering a primary reactor of a fuel processor. The injection location is in the steam supply line where superheated steam vaporizes a majority of the liquid water, preferably prior to injection into the primary reactor. Steam supplied by a vaporizer may temporarily lag desired steam production due to system up-power transients or startup conditions, coupled with vaporizer thermal lag time. Injection of liquid water overcomes this temporary deficit of steam. Additional air is also supplied as needed to improve reactance for a given steam volume/temperature. Injection rate or volume of the liquid water and air may also be based on one or more measured variables of the primary reactor.
    Type: Application
    Filed: August 2, 2002
    Publication date: February 5, 2004
    Inventor: Gary M. Robb
  • Publication number: 20030221637
    Abstract: A process for heating steam, wherein(a) steam is obtained by indirect heat exchange between liquid water and a hot gas,(b) the steam obtained in step (a) is heated by indirect heat exchange with the partly cooled hot gas obtained in step (a),(c) additional water is added to the steam obtained in step (a) prior to or during heating the steam in step (b).
    Type: Application
    Filed: November 18, 2002
    Publication date: December 4, 2003
    Inventors: Franciscus Gerardus Van Dongen, Johannes Didericus De Graaf
  • Patent number: 5273000
    Abstract: A method of controlling the reheat steam temperature in a circulating fluidized bed combustion system wherein the circulating solids are cooled in a heat recovery fluid bed system containing reheat heat exchange surface. The rate of heat transfer and thus the reheat steam temperature are controlled by adjusting the flow rate of fluidizing air to the portion of the heat recovery fluid bed system containing the reheat surface.
    Type: Grant
    Filed: December 30, 1992
    Date of Patent: December 28, 1993
    Assignee: Combustion Engineering, Inc.
    Inventor: John W. Regan
  • Patent number: 5199264
    Abstract: In a power generating installation including a steam turbine-generator system, a source of steam under pressure, and a steam conditioning unit, the steam turbine-generator system including a high pressure turbine and at least one low pressure turbine, each turbine having a steam inlet and an exhaust outlet, and an output shaft coupled to all turbines, and the steam conditioning unit being connected between the exhaust outlet of the high pressure turbine and the steam inlet of each low pressure turbine and being effective to remove moisture from, and reheat, steam flowing between the exhaust outlet of the high pressure turbine and the steam inlet of the low pressure turbine, the steam conditioning unit is composed of two structurally separate devices which include a reheating device which functions exclusively to add heat to the steam and a moisture separating device which acts to remove moisture from the steam.
    Type: Grant
    Filed: February 11, 1991
    Date of Patent: April 6, 1993
    Assignee: Westinghouse Electric Corp.
    Inventor: Paul W. Viscovich
  • Patent number: 5101772
    Abstract: There is disclosed an apparatus for burning a waste gaseous stream having a residual heating value represented by a heat of combustion of from 50 to 900 BTU/SCF. to heat an intermediate heat transfer fluid, and to use the thus heated heat transfer fluid to heat diverse fluids in a plurality of serially arrayed heat exchangers at descending temperature levels.
    Type: Grant
    Filed: October 23, 1990
    Date of Patent: April 7, 1992
    Assignee: American Hydrotherm Corp.
    Inventor: Alfred Bruhn
  • Patent number: 5042432
    Abstract: A superheat bundle for a horizontal tube steam separator-superheater, in which the tubes are disposed inside a rectangular frame (4) which is not rigidly connected to the structure of the separator-superheater. The frame is provided with resilient blades (7, 8) forming a flexible skirt bearing against side plates (2, 3) which are themselves rigidly connected to said structure. The invention is applicable to stations for producing electricity or steam.
    Type: Grant
    Filed: January 16, 1990
    Date of Patent: August 27, 1991
    Assignee: Stein Industrie
    Inventors: Jacques Marjollet, Jean-Jacques Marsault
  • Patent number: 5033414
    Abstract: There is disclosed an apparatus for burning a waste gaseous stream having a residual heating value represented by a heat of combustion of from 50 to 900 BTU/SCF. to heat an intermediate heat transfer fluid, and to use the thus heated heat transfer fluid to heat diverse fluids in a plurality of serially arrayed heat exchangers at descending temperature levels.
    Type: Grant
    Filed: April 14, 1989
    Date of Patent: July 23, 1991
    Assignee: American Hydrotherm Corporation
    Inventor: Alfred Bruhn
  • Patent number: 5014652
    Abstract: A fluid-bed combustion reactor (51) comprising a substantially vertical reactor chamber with a first inlet (9) at the reactor chamber lower portion (52) for the introduction of liquid and/or solid particulate material, and a second inlet (22) at a level below the first inlet for the introduction of gas for fluidization of particulate material within the reactor in order to maintain a primary fluid bed, an exhaust duct (28) at the reactor chamber upper portion for the withdrawal of exhaust gas and particles from the reactor, and a fluid-bed cooler (42) for particular material, formed as an upwards open vessel with generally closed bottom and side walls and arranged so as to collect a portion of particulate material (64, 65) from the reactor chamber upper portion, said cooler comprising heat transfer means (43) such as tubes carrying a heat transfer medium at the inside and having said particulate material flowing at the outside, said cooler comprising at least one conduit (56) for the controlled returning of p
    Type: Grant
    Filed: January 3, 1990
    Date of Patent: May 14, 1991
    Assignee: Aalborg Boilers A/S
    Inventor: Niels J. Hyldgaard
  • Patent number: 4977861
    Abstract: A superheater bundle for a horizontal steam separator-superheater, the bundle comprising an array of parallel tubes disposed in a triangular pitch inside a frame (3, 4) which is polygonal in shape and symmetrical about its plane of symmetry, with the bottom of the frame delimiting an inlet orifice for steam to be superheatd and with the top of the frame delimiting an outlet orifice for superheated steam. At least two of the sloping sides (11, 13, 15, 15, 17; 12, 14, 16, 18) of th polygon-shaped frame (3, 4) are parallel to the sloping segments formed by the pitch of the tubes.
    Type: Grant
    Filed: December 13, 1989
    Date of Patent: December 18, 1990
    Assignee: Societe Anonyme dite: Stein Industrie
    Inventors: Alain Charbonnel, Jean-Claude Foucher
  • Patent number: 4905631
    Abstract: The wet steam flow distribution section (20) of the moisture separator reheater (10) includes a multiplicity of side-by-side spaced-apart channel bars (52,54,56) extending transversely to the direction of steam flow from the distribution section to the moisture separator section (24). The bars are preferably substantially U-shaped in section, whereby the two leg portions (60,62) of each bar may be angled and slightly spaced apart from confronting leg portions of adjacent bars, thereby defining respective diffuser nozzles (64). Each nozzle has a discharge end cross-section elongated in the direction parallel to the bars, for directing wet steam toward the separator section. The spacing (Y) and other design variables associated with the bars, permit optimization and uniformity of flow over the full axial extent of the moisture separator reheater unit with minimum pressure drop across the steam distribution apparatus.
    Type: Grant
    Filed: February 27, 1989
    Date of Patent: March 6, 1990
    Assignee: Combustion Engineering, Inc.
    Inventor: James K. Hayes
  • Patent number: 4721067
    Abstract: Device for injecting a liquid into a tube and steam generator incorporating this device.The cannula has a divergent portion, means located on the bottom part of the cannula for centering the same and immobilizing it in translation relative to the tube, together with a sleeve surrounding the cannula. The means for centering and immobilizing the cannula in translation on the tube are constituted by a centering part, at least one slot and an inner cone formed in the sleeve, an outer cone formed on the bottom part of the cannula, said cones cooperating with one another, means being provided for elastically applying the outer cone to the inner cone.
    Type: Grant
    Filed: May 29, 1985
    Date of Patent: January 26, 1988
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Jean-Edmond Chaix, Michel Metteey, Jean-Paul Badoux
  • Patent number: 4717400
    Abstract: In a device for separating the moisture contained in the cycling steam discharged out of a steam turbine and reheating the low-temperature steam is disclosed, a central chamber is defined between a pair of moisture separating structures and the bottoms of the central chamber, and the separating structures are closed by a closure structure. A steam chamber which is in communication with the central chamber is defined by a pair of side walls and the upper edge of each of the pair of side walls is loosely fitted into a guide groove defined by a pair of spaced guide plates which in turn are securely joined to the inner surface of the cylindrical shell.
    Type: Grant
    Filed: March 27, 1986
    Date of Patent: January 5, 1988
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Toshiaki Ozeki, Kenji Satoh
  • Patent number: 4714054
    Abstract: A trough is formed above the moisture separators in a moisture separator reheater for a power plant and drain conduits are connected to the trough to direct moisture collected in the trough to the bottom of the shell where it joins other collected moisture and is drained from the lower portion of the shell via drain nozzles disposed therein preventing droplets from forming above the separator and dripping down into the flow path of motive steam, becoming reentrained, and resulting in erosion of the separators.
    Type: Grant
    Filed: April 2, 1986
    Date of Patent: December 22, 1987
    Assignee: Westinghouse Electric Corp.
    Inventors: Paul G. Minard, James Alba, David A. Pacyna
  • Patent number: 4708093
    Abstract: An apparatus for drying and superheating steam, especially for supplying steam to a turbine. The apparatus includes a horizontal cylindrical pressure tank that has at least one steam inlet, a water separator that is disposed in the lower portion of the pressure tank and extends essentially over the entire length of the tank, a superheater that is disposed in the upper portion of the pressure tank and extends essentially over the entire length of the tank, and at least one steam outlet disposed on the upper side of the tank and connected to the superheater. The steam inlet is disposed at one end face of the pressure tank. Drying steam leaves the water separator, one end of which is supplied with wet steam, and enters the pressure tank.
    Type: Grant
    Filed: June 19, 1986
    Date of Patent: November 24, 1987
    Assignee: L. & C. Steinmuller GmbH
    Inventors: Gunter Keintzel, Klaus Westebbe
  • Patent number: 4702308
    Abstract: A header for a large heat transfer tube bundle having verticle U-bends. The header provides a four pass system employing the upper ends of the tubes for the first and third passes and the lower ends for the second and fourth passes. The header is arranged with a central divider and two boxes, one on either side of the divider. The boxes separate portions of the tubes from the main header cavities for the third and fourth passes. Condensate is removed after both the second and fourth passes. The first pass includes an inverted U-shaped configuration of tubes to increase available tube side heat to the outer sides of the tube bundle. The boxes include a gasket arrangement for separating portions of the tube bundle into various passes. A diffuser is also employed to better distribute incoming flow to the inverted U-shaped configuration of the first pass tubes.
    Type: Grant
    Filed: September 11, 1984
    Date of Patent: October 27, 1987
    Assignee: Southwestern Engineering Company
    Inventors: Renato R. Noe, Abraham L. Yarden
  • Patent number: 4685511
    Abstract: A tube support for U-shaped tubes of a moisture separator reheater is disclosed. The tube supports in the proximity of U-bend of the U-shaped tubes being divided into an upper movable tube support member and a lower immovable tube support member, whereby the U-shaped tube members are permitted to expand without binding.
    Type: Grant
    Filed: October 8, 1985
    Date of Patent: August 11, 1987
    Assignee: Westinghouse Electric Corp.
    Inventor: Raymond A. Sabatino
  • Patent number: 4683842
    Abstract: An apparatus for drying wet steam and subsequently superheating the dried steam. The apparatus includes a cylindrical tank, a separator that is disposed in the tank for receiving wet steam and removing water therefrom, and a superheater disposed in the tank for receiving dry steam from the separator. The superheater is provided with a plurality of tube bundles, some of which are part of first superheater stage, and the rest are part of a second superheater stage. The tube bundles form a channel in the center of the tank. Outwardly disposed deflectors are disposed in, and extend in the longitudinal direction of, the tank. These deflectors are associated with the tube bundles in such a way that dry steam from the separator flows, from the outside, inwardly through the tube bundles of the first superheater stage, and into the central channel, and from there, from the inside, outwardly through the tube bundles of the second superheater stage.
    Type: Grant
    Filed: August 18, 1986
    Date of Patent: August 4, 1987
    Assignee: L. & C. Steinmuller GmbH
    Inventors: Gunter Keintzel, Klaus Westebbe
  • Patent number: 4671214
    Abstract: A heat exchanger device for drying and then superheating steam, has a cylindrical casing about a horizontal axis. The casing contains:(a) a bottom admission chamber for wet steam;(b) intermediate separator members (7, 8, 9, 10, 21) for removing water from the wet steam;(c) a top bundle of superheater tubes (11); and(d) wet steam flow channels (15, 17) located on either side of the bundles of superheater tubes. These channels are separated from the admission chamber by a partition (19) extending from one only of the sides of the superheaters in such a manner as to ensure that the wet steam rises in the vicinity of the inside surface of the casing round one side only of the superheaters and then descends round the other side towards the inlet to the separator members (21).
    Type: Grant
    Filed: March 21, 1986
    Date of Patent: June 9, 1987
    Assignee: Stein Industrie
    Inventors: Pascal Alias, Olivier Lacoste, Jacques Marjollet, Pierre Pouderoux
  • Patent number: 4635588
    Abstract: A heater comprising two separate tube nests of which one (29) heats the circulating water by condensation and supercooling and the other (39) heats a partial flow of this water by the desuperheating of steam. Steam is admitted through pipe (16). The foregoing partial flow of water comes from the desuperheating zone of a heater located downstream and is admitted through a manifold (41). Pipes (39) are wound round a central drum (43).
    Type: Grant
    Filed: November 15, 1985
    Date of Patent: January 13, 1987
    Assignee: Hamon-Sobelco S.A.
    Inventor: Jules F. R. Ledoux
  • Patent number: 4607689
    Abstract: A reheater for a steam power plant generally comprises a tube plate, a header including a high-temperature chamber and a low-temperature chamber defined outwardly of the tube plate, and a number of heat-exchanger tubes bent into U-shapes, both ends of which are secured to the tube plate. The reheater further comprises nozzle members, each having a flange portion, inserted into the upstream ends of the heat-exchanger tubes, respectively, and a bellmouth plate having a number of holes, secured detachably to the tube plate such that the holes align with the nozzle members. The flange portions of the nozzle members are secured firmly between the bellmouth plate and the tube plate.
    Type: Grant
    Filed: December 23, 1983
    Date of Patent: August 26, 1986
    Assignee: Tokyo Shibaura Denki Kabushiki Kaisha
    Inventors: Yoshio Mochida, Toshiaki Ozeki, Kenji Satoh, Yoshitaka Yuasa
  • Patent number: 4589893
    Abstract: This steam separator superheater comprises a horizontal axis cylindrical shell (1) enclosing in its lower portion a steam and moisture separator and in its upper portion a two-stage steam superheater resting on running paths supported half way up the shell by a frame (5). Each stage of the steam superheater is constituted by two bundles of hair-pin bent tubes (15, 16 and 17, 18) supplied with superheat steam from steam chests (43, 44, 45, 46). The upper stage rests on the lower stage. Both stages are inserted into the shell via sleeves (47, 48) outside the shell and extending loading openings made through an end plate (2) of the shell. The upper stage is lifted into position by lifting gear outside the shell (1) acting by means of lifting lines passing through passages (49) in the shell. The passages are closed by caps (51) when the separator superheater is in use.
    Type: Grant
    Filed: October 17, 1984
    Date of Patent: May 20, 1986
    Assignee: Stein Industrie
    Inventors: Marc Franzolini, Jacques Marjollet
  • Patent number: 4589258
    Abstract: In a wet-steam turbine plant, which comprises a high-pressure turbine (1), at least one low-pressure turbine (3), and a generator (4), and in which a high-velocity water separator (6) is provided in the connecting line (2) between the high-pressure turbine (1) and the low-pressure turbine (3), a reheater (7), of space-saving design, is located downstream of the water separator (6), between the lower and upper cross-connecting lines (2). The reheater (7) is connected in a manner such that the heating steam is admitted to it in cross-flow, and possesses a flow cross-section which approximates to that of the connecting line (2), so that it is a portion thereof.
    Type: Grant
    Filed: November 15, 1983
    Date of Patent: May 20, 1986
    Assignee: BBC Brown, Boveri & Company, Ltd.
    Inventor: Peter von Bockh
  • Patent number: 4576125
    Abstract: A tank containing a water separator composed of bundles of laminations for drying wet vapor, and a superheater for subsequent superheating of the dried vapor. The water separator is coaxially disposed ahead of the superheater in the horizontal-cylindrical tank, which has at least one vapor inlet and one vapor outlet. The superheater includes tube bundles which are uniformly disposed about the central axis of the tank, and can vary in number and type of construction. In the direction of the central axis of the tank, the water separator has the shape of a truncated pyramid or cone. The vapor discharge surfaces of the bundles of laminations, within the water separator, are disposed symmetrically, vertically, and in tiers relative to the central axis of the tank, and are disposed at an angle of between 10.degree. and 170.degree. thereto.
    Type: Grant
    Filed: March 2, 1984
    Date of Patent: March 18, 1986
    Assignee: L. & C. Steinmuller GmbH
    Inventors: Gunter Keintzel, Klaus Westebbe
  • Patent number: 4530814
    Abstract: Apparatus for superheating steam. In accordance with one aspect of the invention, the apparatus is provided with two banks of inclined tubes extending upwardly from an outlet header to respective inlet headers. The banks of tubes are disposed in the flow path of main steam through the apparatus and provide a flow of vapor for adding superheat to the main steam. In accordance with another aspect of the invention, the tubes extend upwardly to closed ends whereby a lower header acts as both a vapor inlet and condensate outlet. In accordance with another aspect of the invention, the vapor is provided by a fossil fuel-fired vapor generator to superheat main steam which has been provided by a nuclear steam generator.
    Type: Grant
    Filed: May 13, 1982
    Date of Patent: July 23, 1985
    Assignee: The Babcock & Wilcox Company
    Inventor: Donald C. Schluderberg
  • Patent number: 4528946
    Abstract: A superheater has a pressure vessel containing upper and lower steam chambers for primary steam between which extends a nest of tubes arranged around a central volume. The volume between the nest of tubes and the pressure vessel is divided into lower and upper volumes by a wall which forces the secondary fluid to be superheated first to pass the nest of tubes radially inwardly into the central volume and thereafter radially outwardly. Primary steam is supplied to the upper steam chamber tangentially and flows under condensation through the tubes to the lower steam chamber where the condensate is discharged. Between the steam chambers a centrally located return conduit can be provided. The rotation of the steam within the upper steam chamber induces a pressure distribution with decreasing pressure from the periphery towards the center which pressure distribution is used for the recirculation of excess primary steam through the return conduit.
    Type: Grant
    Filed: April 20, 1983
    Date of Patent: July 16, 1985
    Assignee: Stal-Laval Apparat AB
    Inventor: Ingemar Greis
  • Patent number: 4494484
    Abstract: The heat exchanger is constructed with a single pressure vessel to contain the ducts for the hot gas flow and the heating surfaces for the secondary medium. The heat exchanger is provided with a central duct for the hot process gas and two parallel branch ducts through which sub-flows of the process gas pass. A throttle member is provided in at least one of the branch ducts in order to throttle the flow of hot gas therethrough. Additional hot gas can be bypassed from the duct section into the exhaust gas from the pressure vessel.
    Type: Grant
    Filed: November 22, 1983
    Date of Patent: January 22, 1985
    Assignee: Sulzer Brothers Limited
    Inventor: Wolfgang Ruzek
  • Patent number: 4485069
    Abstract: A moisture separator reheater having a central chamber with cylindrical wall portions and a generally round tube bundle, the tube bundle having arcuate plates disposed on each side of the bundle which form a wrapper on each side of the tube bundle and having a tongue and groove juncture between the wrapper and cylindrical wall portions to provide a seal therebetween and a track for installing and removing the tube bundle from the central chamber.
    Type: Grant
    Filed: January 20, 1982
    Date of Patent: November 27, 1984
    Assignee: Westinghouse Electric Corp.
    Inventor: Wilbur M. Byerley
  • Patent number: 4386583
    Abstract: A moisture separator reheater apparatus having a shell member and a plurality of tube members situated therein with the shell member having a plurality of cycle steam inlets and a plurality of cycle steam outlets disposed on opposite sidewalls. The tube members are disposed longitudinally in the shell member and include an inlet pass and an outlet pass with the inlet pass receiving a heating fluid on its interior while being exposed to cool cycle steam on its exterior. The outlet pass is situated between the inlet pass and the cycle steam outlets, with the outlet pass receiving on its interior heating fluid which has previously flowed through the inlet pass while being exposed to heated cycle steam from the inlet pass on its exterior. All inlet passes receive heating fluid from a common source.
    Type: Grant
    Filed: November 5, 1981
    Date of Patent: June 7, 1983
    Assignee: Westinghouse Electric Corp.
    Inventor: Thomas J. Rabas
  • Patent number: 4318368
    Abstract: A vertical shell-and-tube steam generator (10) which has a plurality of U-shaped tubes (60,62) through which the heating fluid flows, vaporizing fluid flowing on the outside of the tubes. A plurality of separators (26) are located above the tubes to remove liquid from the generated vapor. Orifices are located in some of the separator inlets (22) located above the hot leg region (60) of the U-tubes reducing the problem of overloading of these separators (26) by accomplishing a more uniform flow distribution of vapor from the areas above both the hot (60) and cold (62) legs of the U-tubes.
    Type: Grant
    Filed: December 29, 1980
    Date of Patent: March 9, 1982
    Assignee: Combustion Engineering, Inc.
    Inventors: William R. Carson, Braj K. Singh
  • Patent number: 4312303
    Abstract: A vertically oriented straight tube steam generator is provided with a boiling portion having tilted baffles to ensure recirculation and nucleate boiling irrespective of the water level and a superheater portion above the water level which allows varying water level for load and pressure control of the steam generator.
    Type: Grant
    Filed: September 25, 1979
    Date of Patent: January 26, 1982
    Assignee: Westinghouse Electric Corp.
    Inventor: Francis J. Sisk
  • Patent number: 4300481
    Abstract: Shell and tube heat exchangers achieve greater efficiency and substantially eliminate instabilities due to condensate subcooling by the location of flow restricting orifices at the outlet ends of heat exchanger tubes adjacent to the outlet header. Outlet orificing preferentially passes liquid condensate so as to prevent accumulation of condensate within the tubes and permits a higher tubeside temperature, even in the most heavily loaded tubes. In a two-pass configuration all tubes are outlet orificed. In a four-pass system, the most heavily loaded tubes (second pass) are orificed, although all tubes may be outlet orificed. Outlet orificing may be used in conjunction with inlet orificing which is used to provide greatest mass flow of tubeside steam to most heavily loaded tubes. Outlet orificing may be used in connection with vertical or horizontal U tube configurations. Preferred embodiment is utilized in a moisture separator reheater for use with steam turbines to reheat steam for later turbine stages.
    Type: Grant
    Filed: December 12, 1979
    Date of Patent: November 17, 1981
    Assignee: General Electric Company
    Inventor: Robert W. Fisk
  • Patent number: 4296713
    Abstract: A vapor generator is described wherein cross-over loops joining two different tube bundles are positioned in a stagnant area out of the flow of the heating fluid, thus reducing the tube metal temperatures in a highly stressed area. Tube anchor devices are provided to reduce expansion movement and stresses while permitting some relative movement and providing support during seismic disturbances.
    Type: Grant
    Filed: February 7, 1979
    Date of Patent: October 27, 1981
    Assignee: General Atomic Company
    Inventors: Edward S. Taylor, George W. Hirschle