Patents Assigned to The Hokkaido Electric Power Company, Inc.
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Patent number: 8637784Abstract: An object is to provide a method and an apparatus for improving a residual stress in a tubular body, which are enabled to improve the residual stress reliably by clearly defining controlling rage for treatment conditions without depending on an installation state and configuration of the tubular body. When a cylindrical tubular body (2) is improved in its residual stress by locally irradiating an outer-circumferential surface of a welded portion (C) of the tubular body (2) with laser beams (5a) and by moving an irradiation area (s) in an circumferential direction, a plurality thermocouples (9) are installed on the tubular body (2) to be improved, a temperature history of the outer surface of the tubular body (2) by the irradiation of the laser beam (5a) is managed by measuring the temperature history itself.Type: GrantFiled: January 11, 2008Date of Patent: January 28, 2014Assignees: Mitsubishi Heavy Industries, Ltd., The Japan Atomic Power Company, Hokkaido Electric Power Company, Inc., Tohoku Electric Power Co., Inc, The Tokyo Electric Power Co., Inc, Chubu Electric Power Co., Inc, Hokuriku Electric Power Company, The Kansai Electric Power Co., Inc, The Chugoku Electric Power Co., Inc, Shikoku Electric Power Co., Inc, Kyushu Electric Power Co., Inc, Electric Power Development Co., LtdInventors: Takahiro Ota, Kazuhiko Kamo, Itaru Muroya, Seiji Asada, Kazuhiro Wakabayashi, Koji Okimura, Hironori Onitsuka
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Patent number: 7871586Abstract: The present invention provides a mercury removal system and method for effectively removing a mercury component, which is present in a gas stream in an extremely small amount in wet gas cleaning. The mercury removal system in wet gas cleaning includes a water washing tower for introducing therein a target gas containing a mercury component and transferring the mercury component into an absorbing solution, a flash drum (10) for flashing the absorbing solution discharged from the water washing tower to separate the absorbing solution into a gas component and waste water, an oxidation treatment means (1) for adding an oxidizing agent to the absorbing solution at the preceding stage of the flash drum, and a waste water treatment means for subjecting to coagulation sedimentation treatment the separated waste water containing the mercury component at the following stage of the flash drum to dispose of the mercury component as sludge.Type: GrantFiled: June 9, 2006Date of Patent: January 18, 2011Assignees: Mitsubishi Heavy Industries, Ltd., Clean Coal Power R&D Co., Ltd., Hokkaido Electric Power Company, Inc., Tohoku Electric Power Co., Inc., The Tokyo Electric Power Company Inc., Chubu Electric Power Co., Inc., Hokuriku Electric Power Company, The Kansai Electric Power Co., Inc., The Chugoku Electric Power Co., Inc., Shikoku Electric Power Co., Inc., Kyushu Electric Power Co., Inc., Central Research Institute of Electric Power IndustryInventors: Masahiro Harada, Makoto Susaki, Shintaro Honjo, Shuji Kameyama, Masaki Nakahara, Akira Kisei
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Publication number: 20090304563Abstract: The present invention provides a mercury removal system and method for effectively removing a mercury component, which is present in a gas stream in an extremely small amount in wet gas cleaning used for coal or heavy oil gasification, petroleum refining and the like. The mercury removal system in wet gas cleaning comprises a water washing tower for introducing therein a target gas containing a mercury component and transferring the mercury component into an absorbing solution, a flush drum (10) for flushing the absorbing solution discharged from the water washing tower to separate the absorbing solution into a gas component and waste water, an oxidation treatment means (1) for adding an oxidizing agent to the absorbing solution at the preceding stage of the flush drum, and a waste water treatment means for subjecting to coagulation sedimentation treatment the separated waste water containing the mercury component at the following stage of the flush drum to dispose of the mercury component as sludge.Type: ApplicationFiled: June 9, 2006Publication date: December 10, 2009Applicants: MITSUBISHI HEAVY INDUSTRIES, LTD., CLEAN COAL POWER R&D CO., LTD., HOKKAIDO ELECTRIC POWER COMPANY INC., TOHOKU ELECTRIC POWER CO., INC., THE TOKYO ELECTRIC POWER COMPANY INC., CHUBU ELECTRIC POWER CO., INC., HOKURIKU ELECTRIC POWER COMPANY, THE KANSAI ELECTRIC POWER CO., INC., THE CHUGOKU ELECTRIC POWER CO., INC., SHIKOKU ELECTRIC POWER CO., INC., KYUSHU ELECTRIC POWER CO., INC., ELECTRIC POWER DEVELOPMENT CO., LTD., CENTRAL RESEARCH INSTITUTE OF ELECTRIC POWER INDUSTRYInventors: Masahiro Harada, Makoto Susaki, Shintaro Honjo, Shuji Kameyama, Masaki Nakahara, Akira Kisei
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Patent number: 6228336Abstract: A dust collecting apparatus and method for dedusting a Ca-containing gas using a ceramics filter is provided, in which a filter differential pressure elevation rate is suppressed. A desulferizing agent 103 and a mineral 106 containing MgO are supplied via a hopper 13, 15 a valve 14 and a feeder 16 into a pressurized fluidized-bed combustion furnace 1 together with coal 101 and air 102. A combustion gas 201 is dedusted by a cyclone 2 to become a combustion gas 301, the combustion gas 301 enters a filter container 3a, 3b having a ceramics filter 31a, 31b and is further dedusted. A combustion gas 401 which is dedusted is supplied into a gas turbine 4 to generate power, and combustion gas 501 heats a waste heat recovery boiler 5 which in turn drives a steam turbine 7. The mineral 106 containing MgO is added in the combustion gas 301 which flows in the ceramics filter 31a, 31b. Thereby MgO is added to the combustion gas so that the filter differential pressure elevation rate can be suppressed.Type: GrantFiled: August 13, 1999Date of Patent: May 8, 2001Assignees: Hokkaido Electric Power Company, Inc., Mitsubishi Heavy Industries, Ltd.Inventors: Yasuo Katsuki, Takashi Ohnishi, Shozo Kaneko, Akira Hashimoto, Yuichi Fujioka, Kikuo Tokunaga, Toshihiko Setoguchi
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Patent number: 5731271Abstract: A method for growing a superconductive film, comprising:(a) helically winding a tape substrate around the outer periphery of a cylindrical or columnar holder and(b) growing a superconductive film on the surface of the tape substrate by plasma flash evaporation, while rotating the holder. According to the present invention, the heat contact between the holder and the tape substrate is stabilized and a high performance tape conductor can be obtained. In addition, degradation of superconductive performance possibly experienced, when the tape is used for a transmission cable or the like, can be lessened. Furthermore, the large area growth, which is the characteristic feature of plasma flash evaporation, is effectively utilized and production efficiency of a long tape conductor can be enhanced.Type: GrantFiled: September 25, 1996Date of Patent: March 24, 1998Assignees: Mitsubishi Cable Industries, Ltd., Hokkaido Electric Power Company, Inc., International Superconductivity Technology CenterInventors: Shigenori Yuhya, Jiro Tsujino, Noriyuki Tatsumi, Yoh Shiohara
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Patent number: 5225393Abstract: A process for forming a thin oxide film on an underlying surface adapted for film formation thereon according to a radio frequency magnetron sputtering method using an oxide target(s). The excitation frequency is a frequency which is higher than 13.56 MHz and which provides a negative target self-bias voltage permitting of film formation.Type: GrantFiled: January 10, 1992Date of Patent: July 6, 1993Assignees: International Superconductivity Technology Center, Oki Electric Industry Co., Ltd., The Hokkaido Electric Power Company Inc., The Chugoku Electric Power Co., Inc., Mitsubishi Materials CorporationInventors: Norio Homma, Hiromi Takahashi, Shinji Kawamoto, Hideyuki Kondo, Tadataka Morishita
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Patent number: 5106821Abstract: A process for forming a thin oxide film on an underlying surface adapted for film formation thereon according to a radio frequency magnetron sputtering method using an oxide target(s). The excitation frequency is higher than 13.56 MHz and provides a lower negative target self-bias voltage permitting improved film formation.Type: GrantFiled: September 10, 1990Date of Patent: April 21, 1992Assignees: International Superconductivity Technology Center, OKI Electric Industry Co., Ltd., The Hokkaido Electric Power Company Inc., The Chugoku Electric Power Co., Inc., Mitsubishi Metal CorporationInventors: Norio Homma, Hiromi Takahashi, Shinji Kawamoto, Hideyuki Kondo, Tadataka Horishita
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Patent number: 5037796Abstract: A process for producing a hydrated and cured product of a lime-gypsum-coal ash mixture capable of constituting a high-performance desulfurizing agent, with a high yield and in a simplified manner is provided, which process comprises adding water to a mixture of lime, used desulfurizing agent and coal ash, followed by kneading the resulting mixture, then extruding the resulting kneaded material through a hole of 2 to 10 mm in diameter to obtain bullet-like materials, hydrating and curing said bullet-like materials, followed by drying.Type: GrantFiled: October 10, 1989Date of Patent: August 6, 1991Assignees: The Hokkaido Electric Power Company, Inc., Babcock-Hitachi Kabushiki/KaishaInventors: Satoshi Kudo, Tsutomu Ueno, Tadaaki Mizoguchi, Takanori Kuwahara, Tsukasa Nishimura