Patents Assigned to ALSTOM Technology
  • Method and device for ascertaining the approach of the lean blow off of a gas turbine engine
    Patent number: 8989986
    Abstract: A method is provided for determining the approach of the lean blow off (LBO) of a gas turbine engine having at least one combustion chamber into which a fuel is supplied and burnt generating a flame. The method includes determining a value indicative of the gas temperature in recirculation areas adjacent to the flame, and identifying the lean blow off (LBO) approach on the basis of this value. A device for determining the approach of the lean blow off (LBO) is also disclosed.
    Type: Grant
    Filed: August 24, 2011
    Date of Patent: March 24, 2015
    Assignee: Alstom Technology Ltd.
    Inventors: Dragan Stankovic, Marta De-La-Cruz-Garcia, Franklin Marie Genin
  • Method for operating a combined-cycle power plant with cogeneration, and a combined-cycle power plant for carrying out the method
    Patent number: 8984894
    Abstract: The invention relates to a method for operation of a combined-cycle power plant with cogeneration, in which method combustion air is inducted in at least one gas turbine, is compressed and is supplied to at least one combustion chamber for combustion of a fuel, and the resultant exhaust gas is expanded in at least one turbine, producing work, and in which method the exhaust gas emerging from the at least one turbine is passed through a heat recovery steam generator in order to generate steam, which generator is part of a water-steam circuit with at least one steam turbine, a condenser, a feedwater tank and a feedwater pump, wherein heat is provided by extracting steam from the at least one steam turbine.
    Type: Grant
    Filed: April 16, 2013
    Date of Patent: March 24, 2015
    Assignee: ALSTOM Technology Ltd
    Inventors: Francois Droux, Dario Ugo Breschi, Karl Reyser, Stefan Rofka, Johannes Wick
  • System and method for recovering ammonia from a chilled ammonia process
    Patent number: 8986640
    Abstract: An ammonia recovery system and method for removing ammonia from a gas stream is provided. The system includes an ammonia recovery vessel for contacting a solution, having a dissolved acidic salt, with the gas stream, having ammonia. The dissolved acidic salt solution absorbs the ammonia in the gas stream to provide an ammonia-lean gas stream and an ammonia-rich solution. The ammonia-rich solution is heated within an ammonia stripper to release the ammonia from the ammonia-rich solution to thereby generate an ammonia-rich gas stream and the solution having dissolved acidic salt. A heat exchanger heats the dissolved acidic salt from the ammonia stripper prior to the solution being provided to the ammonia recovery system. The acidic salt has a low thermal decomposition.
    Type: Grant
    Filed: January 7, 2014
    Date of Patent: March 24, 2015
    Assignee: ALSTOM Technology Ltd
    Inventor: Sanjay Kumar Dube
  • OXY-FIRED BOILER UNIT AND METHOD OF OPERATING THE SAME
    Publication number: 20150079526
    Abstract: An oxy-combustion boiler unit is disclosed which includes a furnace for combusting fuel and for emitting flue gas resulting from combustion. The furnace has first, second and third combustion zones, and an air separation unit for separating oxygen gas from air and providing a first portion of the separated oxygen to a first oxidant flow, a second portion to a second oxidant flow, and a third portion of the separated oxygen gas to the first, second, and third zones of the furnace. A controller can cause the separated oxygen gas to be distributed so that the first and second oxygen flows have a desired oxygen content, and so that the first, second, and third zones of the furnace receive a desired amount of oxygen based on a combustion zone stoichiometry control.
    Type: Application
    Filed: September 18, 2013
    Publication date: March 19, 2015
    Applicant: ALSTOM Technology Ltd
    Inventors: Xinsheng LOU, Jundong Zhang, Abhinaya Joshi, James A. Mccombe, Armand A. Levasseur
  • METHOD AND APPARATUS FOR CATALYZING SEAWATER AERATION BASINS
    Publication number: 20150076081
    Abstract: An apparatus and method for producing a catalyst rich seawater useful to catalyze oxidation reactions in a flue gas desulfurization system seawater aeration basin to obtain a treated seawater.
    Type: Application
    Filed: September 18, 2013
    Publication date: March 19, 2015
    Applicant: ALSTOM Technology Ltd
    Inventors: Dennis James Laslo, Raymond R. Gansley
  • Blade arrangement, especially stator blade arrangement
    Patent number: 8979497
    Abstract: A blade arrangement on a wall of a fluid flow path of a turbomachine includes a locating channel disposed in the wall and having undercut flanks. A plurality of blades each having a blade-side root section corresponding to the undercut flanks. A plurality of intermediate filling pieces correspond to the undercut flanks and separate each of the blade-side root sections. The plurality of blade-side root sections and intermediate filling pieces are seated in a form-fitting manner and fixed in a force-locking manner in the locating channel. The plurality of intermediate filling pieces fill out the locating channel so as to form a gas flow-side surface essentially free of a disturbing contour between the blade-side root sections. Each of the plurality of intermediate filling pieces includes a threaded hole disposed essentially perpendicular to a base of the channel. A screw is disposed in the threaded hole.
    Type: Grant
    Filed: October 26, 2011
    Date of Patent: March 17, 2015
    Assignee: Alstom Technology Ltd.
    Inventors: Ulrich Wellenkamp, Sejko Kolev
  • Flue gas stream bypass during selective catalytic reduction in a power plant
    Patent number: 8980212
    Abstract: A system includes a selective catalytic reactor and a bypass line. The selective catalytic reactor is located downstream of a furnace that generates flue gases. The selective catalytic reactor reduces nitrogen oxides to nitrogen. The bypass line is in fluid communication with the selective catalytic reactor. The bypass line contacts an input line to the selective catalytic reactor, where the bypass line is adapted to handle a volume of flue gases diverted from the selective catalytic reactor. A first control damper is disposed at an inlet to the selective catalytic reactor; and a second control damper is disposed at an inlet to the bypass line. The first control damper and the second control damper interact to divide the flue gas stream between the selective catalytic reactor and the bypass line in a ratio to reduce the amount of sulfur trioxide released from the system to a desirable value.
    Type: Grant
    Filed: August 21, 2013
    Date of Patent: March 17, 2015
    Assignee: ALSTOM Technology Ltd
    Inventors: Scott L. Darling, Mitchell B. Cohen, Todd D. Hellewell
  • Method of monitoring the grading margin between time-current characteristics of intelligent electronic devices
    Patent number: 8981951
    Abstract: A method of monitoring the grading margin between at least two time-current characteristics of Intelligent Electronic Devices (IEDA, IEDB) installed in an electrical power system, each Intelligent Electronic Device comprising a counting means, the grading margin comprising a safety margin set by a user, characterized in that it comprises, when a fault occurs which causes a fault current in the electrical power system, a step of providing a warning to the user when the safety margin is infringed upon.
    Type: Grant
    Filed: November 5, 2009
    Date of Patent: March 17, 2015
    Assignees: Alstom Technology Ltd, Schneider Electric Energy UK Ltd
    Inventors: Sankara Subramanian, Simon Richards, Alan Wixon
  • Gas turbine
    Patent number: 8979479
    Abstract: A gas turbine (1) includes a combustion chamber (2) followed by a stator airfoil row (4) defining a plurality of guide vanes and separated by the combustion chamber (2) by a first gap (5), and a rotor airfoil row (6) separated by the stator airfoil row (4) by a second gap (7). The stator airfoils (15) of the stator airfoil row (4) are connected to guide vane boxes (17) collecting a cooling fluid (A) and injecting it through nozzles (20) in the second gap (7) to make it to enter rotor airfoil inlets (23). The guide vane boxes (23) are provided with passages (30) connecting a zone (31) upstream of the guide vane boxes (17) to a zone (32) of the second gap (7) downstream of the guide vane boxes (32). Moreover, the mouths (3) of the passages (30) facing the rotor airfoil row (6) are closer to a hot gases path than the nozzles (20).
    Type: Grant
    Filed: September 15, 2010
    Date of Patent: March 17, 2015
    Assignee: Alstom Technology Ltd
    Inventors: Ulrich Steiger, Carlos Simon-Delgado, Axel Heidecke, Thomas Zierer, Robert Marmilic
  • Emergency shut-off signal generator for a valve assembly
    Patent number: 8978682
    Abstract: A control system includes a first valve configured to block a fluid flow between a first section of a flow line and a second section of the flow line in response to a first emergency shut-off signal of a first signal type. A second valve is configured to block the second section of the flow line and a third section of the flow line in response to a second emergency shut-off signal of a second signal type, wherein the first signal type differs from the second signal type.
    Type: Grant
    Filed: May 16, 2012
    Date of Patent: March 17, 2015
    Assignee: Alstom Technology Ltd
    Inventors: Andreas Belzner, Dirk Matthes
  • Gas cleaning unit and method for cleaning gas
    Patent number: 8979980
    Abstract: A gas cleaning unit for cleaning a main raw gas stream from a plant comprises a plurality of gas cleaning chambers (34a-c), each gas cleaning chamber (34a-c) equipped with a cleaning chamber inlet (46a-c); an inlet manifold (32), for dividing said main raw gas stream flowing therethrough into a plurality of separate fractional raw gas streams for flow to said cleaning chamber inlets (46a-c); and a plurality of heat exchangers (40a-c), each heat exchanger (40a-c) being located downstream of the inlet manifold (32) for exchanging heat with a respective fractional raw gas stream entering a respective cleaning chamber (34a-c).
    Type: Grant
    Filed: June 28, 2011
    Date of Patent: March 17, 2015
    Assignee: ALSTOM Technology Ltd
    Inventors: Anders Kenneth Sorhuus, Odd Edgar Bjarno
  • Methods for repairing a gas turbine component
    Patent number: 8978249
    Abstract: A method for repairing a gas turbine component includes: identifying on the gas turbine component (10) a worn out location, where the gas turbine component (10) is damaged; removing the damaged location, thereby creating a missing zone (18); manufacturing an insert, which fits into the missing zone (18); putting the insert into the missing zone (18); adjusting the insert in the gas turbine component (10); and joining the adjusted insert to the gas turbine component (10).
    Type: Grant
    Filed: October 29, 2010
    Date of Patent: March 17, 2015
    Assignee: Alstom Technology Ltd.
    Inventors: Simone Hövel, Günter Ambrosy, Matthias Höbel
  • Gas turbine engine and method for cooling the compressor of a gas turbine engine
    Patent number: 8979470
    Abstract: A gas turbine engine includes a compressor with rotor blades having roots connected into seats of a compressor drum. The rotor blade roots and/or the compressor drum have longitudinal passages for a cooling fluid, connecting higher pressure areas to lower pressure areas of the gas turbine engine.
    Type: Grant
    Filed: August 4, 2011
    Date of Patent: March 17, 2015
    Assignee: Alstom Technology Ltd.
    Inventors: Sergei Riazantsev, Holger Kiewel, Sven Olmes, Thomas Kramer, Sergey Shchukin
  • Gas turbine of the axial flow type
    Patent number: 8979482
    Abstract: In an axial flow gas turbine (30), a reduction in cooling air mass flow and leakage in combination with an improved cooling and effective thermal protection of critical parts within the turbine stages of the turbine is achieved by providing, within a turbine stage (TS), devices (43-48) to direct cooling air that has already been used to cool, especially the airfoils of the vanes (31) of the turbine stage (TS), into a first cavity (41) located between the outer blade platforms (34) and the opposed stator heat shields (36) for protecting the stator heat shields (36) against the hot gas and for cooling the outer blade platforms (34).
    Type: Grant
    Filed: November 29, 2011
    Date of Patent: March 17, 2015
    Assignee: Alstom Technology Ltd.
    Inventors: Alexander Anatolievich Khanin, Valery Kostege
  • Combustion device with a layered wall structure for a gas turbine
    Patent number: 8978382
    Abstract: A combustion device for a gas turbine includes an interior portion, an inner wall having a plurality of first passages and an outer wall having a plurality of second passages configured to cool the inner wall, each of the plurality of second passages having an outlet opening into a third passage. An intermediate layer is disposed between the inner wall and the outer wall and defines a plurality of chambers, each chamber forming a Helmholtz damper and being connected to the interior portion by at least one of the plurality of first passages and being connected to at least one of the plurality of second passages by at least one of the plurality of third passages.
    Type: Grant
    Filed: February 22, 2011
    Date of Patent: March 17, 2015
    Assignee: Alstom Technology Ltd.
    Inventors: Andreas Huber, Nicolas Noiray, Urs Benz, Felix Reinert, Diane Lauffer
  • AUTOMATIC TUNING CONTROL SYSTEM FOR AIR POLLUTION CONTROL SYSTEMS
    Publication number: 20150073572
    Abstract: An automatic tuning control system and method for controlling air pollution control systems such as a dry flue gas desulfurization system is described. The automatic tuning control system includes one or more PID controls and one or more supervisory MPC controller layers. The supervisory MPC controller layers are operable for control of an air pollution control system and operable for automatic tuning of the air pollution control systems using particle swarm optimization through simulation using one or more dynamic models, and through control system tuning of each of the PID controls, MPC controller layers and an integrated MPC/PID control design.
    Type: Application
    Filed: September 10, 2013
    Publication date: March 12, 2015
    Applicant: ALSTOM Technology Ltd
    Inventors: Abhinaya Joshi, John M. Peluso, Shu Zhang, Xinsheng Lou
  • Converter
    Patent number: 8976555
    Abstract: A converter has converting groups with a first stage connected to input lines thereof and a second stage connected to output lines. The first and second stages have positive and negative branches that are connected together.
    Type: Grant
    Filed: December 5, 2012
    Date of Patent: March 10, 2015
    Assignee: Alstom Technology Ltd
    Inventors: Joerg Oesterheld, Thierry Lecomte, René Wilhelm Schaefer
  • Axial flow gas turbine
    Patent number: 8974174
    Abstract: An axial flow gas turbine (35) has a rotor with alternating rows of air-cooled blades (40) and rotor heat shields, and a stator with alternating rows of air-cooled vanes (41) and stator heat shields (47) mounted on inner rings (46A) reduction in cooling air mass flow and an improved cooling and effective thermal protection of critical parts within the turbine stages of the turbine is achieved by adapting the stator heat shields (47) and outer vane platforms (38) within a turbine stage (TS) to one another such that air (37) leaking through the joints between the outer vane platforms (38) and the adjacent stator heat shields (47) into the hot gas path (42) is directed onto the blade crown (32) of the blades (40).
    Type: Grant
    Filed: November 29, 2011
    Date of Patent: March 10, 2015
    Assignee: Alstom Technology Ltd.
    Inventors: Alexander Anatolievich Khanin, Valery Kostege
  • Light weight shroud fin for a rotor blade
    Patent number: 8967972
    Abstract: A turbine blade is provided and includes a tip end carrying a shroud and at least one fin, which extends radially away from the shroud. The fin includes a first sidewall and a second sidewall, which are spaced apart, arranged parallel to each other, and are connected to the shroud, and a cutting edge, which is connected to the first and second sidewalls. The cutting edge thereby creates a hollow space between the sidewalls, the shroud, and the cutting edge, and further extends radially away from the first and second sidewalls. Also provided is a method of manufacturing the blade by casting the blade as single piece with the hollow fin or by forging the blade; and machining the fin to create the first and second sidewalls and cutting edge thereby opening the hollow space between said sidewalls and the cutting edge.
    Type: Grant
    Filed: November 2, 2012
    Date of Patent: March 3, 2015
    Assignee: ALSTOM Technology Ltd.
    Inventors: Herbert Brandl, Igor Tsypkakyin, Philipp Indlekofer
  • Combustion device
    Patent number: 8966905
    Abstract: A combustion device includes a plurality of mixing devices into which a fluid containing oxygen and a fuel are introduced and mixed to form a mixture. The combustion device also includes a combustion chamber in which the mixture formed in the mixing devices is burnt. Each mixing device has a conical body with a lance projecting into the conical body, where the fuel is injectable into the conical body. Tips of the lances of different mixing devices have different distances from corresponding open ends of the respective conical bodies.
    Type: Grant
    Filed: August 25, 2011
    Date of Patent: March 3, 2015
    Assignee: Alstom Technology Ltd.
    Inventors: Marta De La Cruz Garcia, Nicolas Noiray, Ghislain Singla