Patents Assigned to Tohoku Electric Power Company, Inc.
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Patent number: 10309245Abstract: Provided is a gas turbine capable of achieving high-speed startup of the gas turbine through quick operation control of an ACC system during startup of the gas turbine, improving the cooling efficiency of turbine stationary components, and quickly carrying out an operation required for cat back prevention during shutdown of the gas turbine.Type: GrantFiled: September 2, 2015Date of Patent: June 4, 2019Assignees: MITSUBISHI HEAVY INDUSTRIES, LTD., TOHOKU ELECTRIC POWER COMPANY, INC.Inventors: Satoshi Mizukami, Tatsuo Ishiguro, Junichiro Masada, Kazumasa Takata, Yuya Fukunaga, Hiroki Takahashi, Masaki Satoh, Yoshiaki Nishimura, Norio Oogai, Souji Hasegawa, Masato Hayashi
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Patent number: 10247030Abstract: Provided is a gas turbine capable of achieving high-speed startup of the gas turbine through quick operation control of an ACC system during startup of the gas turbine, improving the cooling efficiency of turbine stationary components, and quickly carrying out an operation required for cat back prevention during shutdown of the gas turbine.Type: GrantFiled: September 2, 2015Date of Patent: April 2, 2019Assignees: MITSUBISHI HEAVY INDUSTRIES, LTD., TOHOKU ELECTRIC POWER COMPANY, INC.Inventors: Satoshi Mizukami, Tatsuo Ishiguro, Junichiro Masada, Kazumasa Takata, Yuya Fukunaga, Hiroki Takahashi, Masaki Satoh, Yoshiaki Nishimura, Norio Oogai, Souji Hasegawa, Masato Hayashi
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Patent number: 9951644Abstract: Provided is a gas turbine capable of achieving high-speed startup of the gas turbine through quick operation control of an ACC system during startup of the gas turbine, improving the cooling efficiency of turbine stationary components, and quickly carrying out an operation required for cat back prevention during shutdown of the gas turbine.Type: GrantFiled: September 2, 2015Date of Patent: April 24, 2018Assignees: MITSUBISHI HEAVY INDUSTRIES, LTD., TOHOKU ELECTRIC POWER COMPANY, INC.Inventors: Satoshi Mizukami, Tatsuo Ishiguro, Junichiro Masada, Kazumasa Takata, Yuya Fukunaga, Hiroki Takahashi, Masaki Satoh, Yoshiaki Nishimura, Norio Oogai, Souji Hasegawa, Masato Hayashi
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Patent number: 9255490Abstract: Provided is a gas turbine capable of achieving high-speed startup of the gas turbine through quick operation control of an ACC system during startup of the gas turbine, improving the cooling efficiency of turbine stationary components, and quickly carrying out an operation required for cat back prevention during shutdown of the gas turbine.Type: GrantFiled: September 24, 2009Date of Patent: February 9, 2016Assignees: MITSUBISHI HEAVY INDUSTRIES, LTD., TOHOKU ELECTRIC POWER COMPANY, INC.Inventors: Satoshi Mizukami, Tatsuo Ishiguro, Junichiro Masada, Kazumasa Takata, Yuya Fukunaga, Hiroki Takahashi, Masaki Satoh, Yoshiaki Nishimura, Norio Oogai, Souji Hasegawa, Masato Hayashi
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Publication number: 20150377055Abstract: Provided is a gas turbine capable of achieving high-speed startup of the gas turbine through quick operation control of an ACC system during startup of the gas turbine, improving the cooling efficiency of turbine stationary components, and quickly carrying out an operation required for cat back prevention during shutdown of the gas turbine.Type: ApplicationFiled: September 2, 2015Publication date: December 31, 2015Applicants: MITSUBISHI HEAVY INDUSTRIES, LTD., TOHOKU ELECTRIC POWER COMPANY, INC.Inventors: Satoshi Mizukami, Tatsuo Ishiguro, Junichiro Masada, Kazumasa Takata, Yuya Fukunaga, Hiroki Takahashi, Masaki Satoh, Yoshiaki Nishimura, Norio Oogai, Souji Hasegawa, Masato Hayashi
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Publication number: 20150377056Abstract: Provided is a gas turbine capable of achieving high-speed startup of the gas turbine through quick operation control of an ACC system during startup of the gas turbine, improving the cooling efficiency of turbine stationary components, and quickly carrying out an operation required for cat back prevention during shutdown of the gas turbine.Type: ApplicationFiled: September 2, 2015Publication date: December 31, 2015Applicants: MITSUBISHI HEAVY INDUSTRIES, LTD., TOHOKU ELECTRIC POWER COMPANY, INC.Inventors: Satoshi Mizukami, Tatsuo Ishiguro, Junichiro Masada, Kazumasa Takata, Yuya Fukunaga, Hiroki Takahashi, Masaki Satoh, Yoshiaki Nishimura, Norio Oogai, Souji Hasegawa, Masato Hayashi
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Publication number: 20150377054Abstract: Provided is a gas turbine capable of achieving high-speed startup of the gas turbine through quick operation control of an ACC system during startup of the gas turbine, improving the cooling efficiency of turbine stationary components, and quickly carrying out an operation required for cat back prevention during shutdown of the gas turbine.Type: ApplicationFiled: September 2, 2015Publication date: December 31, 2015Applicants: MITSUBISHI HEAVY INDUSTRIES, LTD., TOHOKU ELECTRIC POWER COMPANY, INC.Inventors: Satoshi Mizukami, Tatsuo Ishiguro, Junichiro Masada, Kazumasa Takata, Yuya Fukunaga, Hiroki Takahashi, Masaki Satoh, Yoshiaki Nishimura, Norio Oogai, Souji Hasegawa, Masato Hayashi
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Publication number: 20110138818Abstract: Provided is a gas turbine capable of achieving high-speed startup of the gas turbine through quick operation control of an ACC system during startup of the gas turbine, improving the cooling efficiency of turbine stationary components, and quickly carrying out an operation required for cat back prevention during shutdown of the gas turbine.Type: ApplicationFiled: September 24, 2009Publication date: June 16, 2011Applicants: MITSUBISHI HEAVY INDUSTRIES, LTD., TOHOKU ELECTRIC POWER COMPANY, INC.Inventors: Satoshi Mizukami, Tatsuo Ishiguro, Junichiro Masada, Kazumasa Takata, Yuya Fukunaga, Hiroki Takahashi, Masaki Satoh, Yoshiaki Nishimura, Norio Oogai, Souji Hasegawa, Masato Hayashi
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Patent number: 6523352Abstract: Piping support of a gas turbine steam cooled combustor is improved such that even when the piping support is damaged by combustion vibration, dropping of the piping support from the piping is prevented, so as to avoid intrusion of fractions of the piping support into turbine portion. An outer fitting member is fixed to a wall surface of a tail tube by welds. A ring is pinched inside the outer fitting member to be fixed by welds. The ring having an inner diameter slightly larger than an outer diameter of steam piping is fitted around the steam piping to be fixed by welds at three places. The steam piping is fixed to the ring, the ring is fixed to the outer fitting member and the outer fitting member is fixed to the tail tube. Thus, the steam piping is supported to the tail tube and even when the welds are detached by combustion vibration, no case of the outer fitting member dropping from the steam piping occurs.Type: GrantFiled: July 24, 2000Date of Patent: February 25, 2003Assignees: Tohoku Electric Power Company, Inc., Mitsubishi Heavy Industries, Ltd.Inventors: Syuichi Takahashi, Yoshiaki Nishimura, Hiroyuki Fujita, Hiroyuki Ogasawara, Noboru Yamada, Ikuo Ando, Haruhiko Kondo, Kazunori Chiba, Yoichi Iwasaki, Masayuki Takahama, Koichiro Yanou
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Patent number: 6277327Abstract: This invention relates to equipment for treating the aforesaid waste plastics directly with supercritical water, and an object thereof is to provide a method for the anticorrosive treatment of waste plastics treating equipment which makes it possible to use inexpensive stainless steel. Waste plastics treating equipment made of stainless steel is charged with a predetermined amount of an aqueous solution containing at least one alkali metal salt, and this aqueous solution is deaerated until its dissolved oxygen content is reduced to 0.5 mg/L or less. After the temperature and pressure of the equipment are raised until supercritical conditions are established, these temperature and pressure are maintained for a predetermined period of time.Type: GrantFiled: January 29, 1999Date of Patent: August 21, 2001Assignees: Tohoku Electric Power Company, Inc., Mitsubishi Heavy Industries, Ltd.Inventors: Masanori Tabata, Naohiko Ukawa, Masato Kaneko, Kazuto Kobayashi, Shigeo Hasegawa, Wataru Matsubara, Kenji Iwasaki, Yoshihisa Saito, Takehiko Moriya
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Patent number: 6066263Abstract: A safe and efficient hydrothermal reaction apparatus for converting waste plastic into oil is described herein. The apparatus comprises a receiver tank for containing therein a mixture of plastic and water; a high-pressure injection pump in communication with the receiver tank through a flow passage change-over valve, the flow passage change-over valve being in communication with a water injection passage; a reactor device including a curved piping in communication with the injection pump, the curved piping being provided with a heating means; and an effluent tank in communication with the reactor device through a pressure reducing valve. The flow rate of the mixture injected into the reaction device may be controlled by regulating the pressure reducing valve.Type: GrantFiled: March 12, 1998Date of Patent: May 23, 2000Assignees: Tohoku Electric Power Company, Inc., Ohei Developmental Industries, Co., Inc.Inventors: Hisaaki Makino, Takehiko Moriya, Yoshihisa Saito, Masazumi Kanazawa
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Patent number: 5843386Abstract: A safe and efficient hydrothermal reaction apparatus is described herein. Decomposition or synthesis of object material is performed by the continuous passing of the material through a flow passage of multi-staged reactor units under turbulent flow conditions. The flow passage is formed by a curved or spiral piping. In each reactor unit, a hot plate block is included as a heating unit. The hot plate block and the curved piping are placed in an appropriate thermal contact relationship. A portion of the curved piping is freely supported, so as to accommodate stress caused in the piping under high-temperature/high-pressure conditions. A tank is provided for regulating or controlling the pressure fluctuation within the flow passage which may be caused by solids or powder present or occurring in the flow passage during high-pressure treatment.Type: GrantFiled: April 10, 1996Date of Patent: December 1, 1998Assignees: Tohoku Electric Power Company, Inc., Ohei Developmental Industries Co., Inc.Inventors: Hisaaki Makino, Takehiko Moriya, Yoshihisa Saito, Masazumi Kanazawa
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Patent number: 5652199Abstract: A method of manufacturing an oxide superconductor, including the steps of mixing oxide materials of the metals contained in an oxide superconductor represented by HgBa.sub.2 Ca.sub.2 Cu.sub.3 O.sub.8+y to prepare a powder mixture of the composition noted above, molding the powder mixture to prepare a molded body of a desired shape, and applying a heat treatment to the molded body within a hermetic container at a temperature sufficient for bringing about a solid phase reaction of the oxide materials for at least 20 hours.Type: GrantFiled: December 21, 1994Date of Patent: July 29, 1997Assignees: International Superconductivity Technology Center, Tohoku Electric Power Company, Inc., Sumitomo Electric Industries, Ltd.Inventors: Kazuyuki Isawa, Ayako Yamamoto, Seiji Adachi, Makoto Itoh, Hisao Yamauchi
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Patent number: 5333991Abstract: A thermal fatigue prevention apparatus for a high temperature pump which includes an impeller in a high temperature pump casing, a pump shaft rotatably supported by a journal of a submerged bearing and projecting from a shaft through hole of a casing cover, and a shaft sealing device. The shaft sealing device is enclosed with a shaft sealing chamber which is supplied with a low temperature seal purging liquid, and a part of the seal purging liquid flows into the pump casing through the shaft through hole. A heater is provided within the high temperature pump, the heater raises the temperature of the low temperature seal purging liquid before the seal purging liquid flows into the pump casing by using the high temperature pumping liquid.Type: GrantFiled: April 23, 1993Date of Patent: August 2, 1994Assignees: Ebara Corporation, The Tokyo Electric Power Company Inc., Tohoku Electric Power Company Inc., Chubu Electric Power Company Inc., Hokuriku Electric Power Company, Chugoku Electric Power Company, Inc., The Japan Atomic Power Company, Kabushiki Kaisha Toshiba, Hitachi Ltd.Inventor: Hiroyuki Kato
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Patent number: 5190914Abstract: A superconducting material is disclosed which includes oxides of metals having the following composition:(Pb.sub.1-z Cu.sub.z) ((Sr.sub.1-y Ba.sub.y).sub.1-v Ca.sub.v).sub.2 (A.sub.1-x Ca.sub.x)Cu.sub.2wherein A is at least one element selected from the group consisting of Y, La, Nd, Sm, Eu, Gd, Ho, Er, Yb and mixtures of at least one of Y, La, Nd, Sm, Eu, Gd, Ho, Er and Yb with at least one of Tb, Tm and Lu, x, y, v and z are numbers satisfying the following conditions:0.ltoreq.x.ltoreq.0.4,0.1.ltoreq.y<0.7,0.ltoreq.v.ltoreq.0.2x, and2y-0.4.ltoreq.z.ltoreq.2y+0.2with the proviso that 0.6-x.ltoreq.z<1.0 when 0.ltoreq.x.ltoreq.0.2 and that 0.4.ltoreq.z<1.0 when 0.2.ltoreq.x.ltoreq.0.4. The superconducting material is produced by providing a blend of compounds of the metals in the metal oxides, and heating the blend at an oxygen partial pressure P of at least 0.001 atm and temperature of (860+40logP) .degree.C. to (1060+40logP) .degree.C.Type: GrantFiled: February 28, 1991Date of Patent: March 2, 1993Assignees: International Superconductivity Technology Center, Kyocera Corporation, Tohoku Electric Power Company, Inc., Furukawa Electric Co., Ltd.Inventors: Shin-ichi Koriyama, Kazuhiro Sakuyama, Toshihiko Maeda, Hisao Yamauchi, Shoji Tanaka
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Patent number: 4759988Abstract: Disclosed is an improved granular material used for forming construction materials such as concrete and mortar. The grain material comprises a main material of fly ash or slug powder and reinforcing fibers. The reinforcing fibers are mixed with the main material together with a binder to form a grain body such that the reinforcing fibers project outward from the surface of the grain body. The reinforcing fibers mixed in this fashion permit increasing the bonding strength between the grain and the binder such as cement so as to improve the mechanical strength of the resultant construction material.Type: GrantFiled: June 3, 1987Date of Patent: July 26, 1988Assignees: Tohoku Electric Power Company, Inc., Yoshihiko Ohama, Tohoku Pole Company, Inc.Inventors: Tadashi Yamamoto, Yoshihiko Ohama, Seishi Suzuki
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Patent number: 4025788Abstract: A radiometric analyzer for measuring the characteristic values of a sample by radiation includes a plurality of radiation measuring subsystems having different ratios of sensitivities to the elements of the sample and linearizing circuits having inverse function characteristics of calibration functions (calibration function while varying the density in a constant content ratio of the sample) which correspond to the radiation measuring subsystems and a weighing adder for operating a desirable linear combination of the outputs of the linearizing circuits and operators for operating between two or more different linear combinations.Type: GrantFiled: February 5, 1976Date of Patent: May 24, 1977Assignees: Tohoku Electric Power Company, Inc., Mitsubishi Denki Kabushiki KaishaInventors: Sumitaro Arima, Minoru Oda, Kyoichi Miyashita, Mamoru Takada
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Patent number: 4001589Abstract: A radiometric analyzer for measuring characteristics of a material by radiation comprises a plurality of systems in which each consists of a radiation source and a radiation detector which are the same in number as the number of elements of the molecule of the material and a linear calibration circuit having inverse response characteristics (calibration curve) of the respective systems of detectors, whereby the measurement is carried out by a four fundamental rules operation of the mutual outputs of said detector system obtained through said linear calibration circuit. One typical embodiment is a radiometric analyzer for hydrocarbons which measures the density of heavy oil, the sulfur content and the calorific value by three detector systems which include a .gamma.-ray source (E.sub..gamma. > 50 KeV), a soft X-ray source (Ex .apprxeq. 20 Kev), and a neutron ray source.Type: GrantFiled: April 17, 1975Date of Patent: January 4, 1977Assignees: Tohoku Electric Power Company, Inc., Mitsubishi Denki Kabushiki KaishaInventors: Sumitaro Arima, Minoru Oda, Kyoichi Miyashita, Mamoru Takada