Patents Assigned to Hitachi Power Europe GmbH
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Publication number: 20140290245Abstract: In the case of a solar thermal energy generating plant with a first solar array, using water as a heat transfer medium, a water separator, arranged downstream of the first solar array, and a high-pressure turbine, it is intended to achieve the effect of increasing the efficiency of the solar thermal energy generating plant. This is achieved by a first superheater for overheating the steam leaving the water separator being arranged between the water separator and the high-pressure turbine.Type: ApplicationFiled: December 28, 2011Publication date: October 2, 2014Applicant: HITACHI POWER EUROPE GMBHInventors: Brian Stöever, Christian Bergins, Jürgen Klebes, Marinus Joormann
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Publication number: 20140246482Abstract: In some embodiments, a forming body for the temporary sealing of a flow cross-section of an assigned object to be welded is disclosed. In some embodiments, the forming body comprises a dimensionally stable, preferably biologically-degradable material, which has a water solubility?90% and of which the main component is corn starch and/or corn semolina and/or corn flakes.Type: ApplicationFiled: August 31, 2012Publication date: September 4, 2014Applicant: Hitachi Power Europe GmbHInventor: Michael Buschmann
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Publication number: 20130152877Abstract: In a method for reducing the oxygen content in the flow volume of tubes of erected and installed tube wall regions or tube wall segments of a steam generator or steam boiler of a power station fired, in particular, with carbon-containing fuel, a solution is to be provided which eliminates or at least diminishes the problem of the incorporation of atmospheric oxygen into the boiler water which arises when tubes of the steam generator wall are being filled with boiler water and/or when boiler water is being discharged from these tubes.Type: ApplicationFiled: December 17, 2012Publication date: June 20, 2013Applicant: Hitachi Power Europe GmbHInventor: Hitachi Power Europe GmbH
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Publication number: 20130101949Abstract: In the case of a method for the heat treatment of erected, preferably large-area tube wall regions or tube wall segments, in particular of a diaphragm wall, of a steam generator, in particular of a power plant, in the installed state, it is sought to provide a solution which permits the use of steel types which are more problematic with regard to power plant operation with elevated steam parameters, in particular the steels T23 and T24, in the erection of steam generators. This is achieved in that the tube wall regions or tube wall segments for heat treatment are subjected, in the installed state in the steam generator, and in particular over a large area, to a stress-relief annealing process.Type: ApplicationFiled: October 19, 2012Publication date: April 25, 2013Applicant: Hitachi Power Europe GmbHInventor: Hitachi Power Europe GmbH
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Publication number: 20120216540Abstract: The invention relates to a method for recovering heat by joining a plurality of heat flows of a fossil-fired, in particular carbon-fired, power plant (1), which downstream of the combustion comprises a CO2 scrubbing station (58) for the flue gas by way of chemical absorption and/or desorption and associated CO2 compression (27), which method aims to enable a CO2 scrubbing station for the flue gas, with associated CO2 compression, to be integrated into the total energy heat flow and/or the total heat energy balance of a fossil-fired, in particular carbon-fired, preferably conventional, power plant in a way that is advantageous in terms of heating technology.Type: ApplicationFiled: July 6, 2010Publication date: August 30, 2012Applicant: HITACHI POWER EUROPE GMBHInventors: Brian Stoever, Dieter König, Christian Bergins, Martin Schönwälder, Torsten Buddenberg
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Publication number: 20120115094Abstract: For a steam generator comprising a combustion chamber fired with a fossil fuel and/or with particulate fuel containing carbon and at least one burner level comprising several burners (1) and/or at least one level comprising nozzles in the form of upper air nozzles and/or side wall nozzles, each having connected feed means (9, 10, 11, 12) and/or feed lines (2, 4, 5, 9a-9d, 10a-10d, 11a-11d, 12a-12d) through which/by means of which gas flows conveying combustion and/or oxidation oxygen can be fed to burners (1) and/or the nozzles (13) and/or the combustion chamber, a solution should be created by means of which undesired oxygen contents in the flue gas can be avoided during oxyfuel operation of the steam generator in the partial-load range.Type: ApplicationFiled: March 25, 2010Publication date: May 10, 2012Applicant: HITACHI POWER EUROPE GMBHInventors: Christian Bergins, Jürgen Niesbach, Alfred Gwosdz
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Publication number: 20110108643Abstract: In a roller mill (1, 46), in particular a coal mill, comprising a mill housing (2) comprising a rotating grinding table (4) with grinding tools located thereon, in particular grinding rolls (5), a grind material feed (9), a classifier (8), at least one grind material exit (11), at least one sealing gas seal (14, 16, 17, 19) that seals off the mill interior (31) from the outside atmosphere in the area of moving mill elements and a carrier gas feed (12), wherein the roller mill (1, 46) can be operated in pressurized mode, a solution is to be provided that facilitates the use of recirculated stack gas as sealing gas without significantly affecting the mill environment.Type: ApplicationFiled: March 11, 2009Publication date: May 12, 2011Applicant: Hitachi Power Europe GmbHInventors: Thomas Krause, Werner Bischoff, Tieu Le Van
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Publication number: 20110033359Abstract: In a process for removing pollutants from a flue gas stream (31) formed in the firing of a fossil fuel in a combustion chamber of a power station in a plurality of process stages (1, 2, 3), which comprise a first process stage (1) in which the flue gas stream (31, 9, 10) is subjected to gas scrubbing with a first chemical absorbent (6), and a process stage (3) which precedes the first process stage (1), in which the flue gas stream (31) is subjected to a flue gas desulphurization treatment (11) with a calcium-containing chemical absorbent (32), a solution should be provided which makes it possible to reduce the pollutant and solids contents of a flue gas stream formed in the combustion of fossil fuels, in particular coal, to the extent that directly after, with sufficient service life CO2 separation can be carried out continuously by means of a flue gas scrubber and can be integrated into the exhaust gas purification of a power station, in particular coal power station.Type: ApplicationFiled: August 6, 2008Publication date: February 10, 2011Applicant: Hitachi Power Europe GmbHInventors: Georg Papenheim, Torsten Buddenberg
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Publication number: 20110015776Abstract: The invention related to a control system for a mill, particularly a roller grinding mill, comprising a mill control device (11), which is designed to control at least one mill characteristic on the basis of an associated target variable, and a fuzzy-control device (13), which is connected to the mill control device (11) and designed to adjust the target variable of the at least one mill characteristic to be controlled when at least one operating parameter of the mill deviates from a predefined normal range as a function of fuzzy rules that are based on said at least one operating parameter of the mill until the at least one operating parameter of the mill has reached the predefined normal range again. A solution is to be provided, which enables automated optimized mill operation even with changing operating conditions, particularly a mill operation that prevents the “mill rumbling”.Type: ApplicationFiled: December 6, 2008Publication date: January 20, 2011Applicants: Hitachi Power Europe GmbH, Evonik Energy Services GmbhInventors: Dietmar Gocht, Werner Bischoff, Thomas Krause, Alfred Gwosdz
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Patent number: 7533633Abstract: The invention relates to the establishing of a connection between steam generator heating surfaces made of austenitic materials and a collector and/or distributor made of martensitic or ferritic materials or of a nickel-base alloy. In order to extend the expectation of serviceable life of the connection, the pipe nipple of the reservoir used as a collector or distributor is made of a nickel-base alloy and directly welded to the collector wall in such a manner that an axial gap remains between the connecting branch and the collector wall. In a connection of the aforementioned type between steam generator heating surfaces made of austenitic materials and the pipe nipple or the pipe nipple and the collector made of martensitic materials, the coefficient of expansion of the material of the pipe nipple has a particularly good effect upon the serviceable life of the entire connection.Type: GrantFiled: July 4, 2005Date of Patent: May 19, 2009Assignee: Hitachi Power Europe GmbHInventors: Martin Becker, Dietmar Hettkamp, Ralf-Udo Husemann
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Patent number: 7509928Abstract: 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: GrantFiled: February 1, 2007Date of Patent: March 31, 2009Assignee: Hitachi Power Europe GmbHInventors: Martin Becker, Vu-Tam Lai