Patents Assigned to The Chugoku Electric Power Co., Inc.
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Publication number: 20110318697Abstract: Provided is a ground flare in which a low-frequency vibration generated from a ground flare tower, such as a chimney, is properly adjusted to suppress it below a fixture-vibration generation limit, thereby preventing surrounding objects from resonating and vibrating. In a ground flare that burns a flammable exhaust gas with a burner at the lower end of a chimney, in which the lower end of the chimney and the periphery of the burner are surrounded by a windbreak, the low-frequency-noise sound pressure level of a ground flare tower composed of the chimney and the windbreak is reduced by selecting at least one of changing a natural frequency generated from the ground flare tower, using multiple ground flare towers, and installing a low-frequency-vibration absorber in the ground flare tower.Type: ApplicationFiled: December 18, 2009Publication date: December 29, 2011Applicants: MITSUBISHI HEAVY INDUSTRIES, LTD., HOKKAIDO ELECTRIC POWER COMPANY, INCORPORATED, TOHOKU ELECTRIC POWER CO., INC., THE TOKYO ELECTRIC POWER COMPANY, INCOPORATED, CHUBU ELECTRIC POWER CO., INC., CLEAN COAL POWER R&D CO., LTD., 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., HOKURIKU ELECTRIC POWER COMPANYInventors: Katsuhiko Yokohama, Iwao Honda, Naoki Suganuma, Hirofumi Ando, Naoshige Yoshida, Yoshihiko Horie, Hitoshi Terada, Toru Kawai, Atsushi Kimura
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Patent number: 8032196Abstract: A Josephson device includes a first superconducting electrode layer, a barrier layer and a second superconducting electrode layer that are successively stacked. The first and second superconducting electrode layers are made of an oxide superconductor material having (RE)1(AE)2Cu3Oy as a main component, where an element RE is at least one element selected from a group consisting of Y, La, Pr, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb and Lu, and an element AE is at least one element selected from a group consisting of Ba, Sr and Ca. The barrier layer is made of a material that includes the element RE, the element AE, Cu and oxygen, where in cations within the material forming the barrier layer, a Cu content is in a range of 35 At. % to 55 At. % and an RE content is in a range of 12 At. % to 30 At. %, and the barrier layer has a composition different from compositions of the first and second superconducting electrode layers.Type: GrantFiled: August 23, 2007Date of Patent: October 4, 2011Assignees: Chugoku Electric Power Co., Inc., International Superconductivity Technology Center, The Juridical FoundationInventors: Hironori Wakana, Seiji Adachi, Koji Tsubone, Keiichi Tanabe
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Patent number: 7875459Abstract: Data on a secular change of each denitration catalyst is managed based on data obtained by a periodic maintenance and a daily management. Management of a secular change and prediction on performance variations that occur until a next periodic check is performed. It is determined whether the denitration catalyst is deteriorated such that an exhaust-gas denitration system cannot maintain its performance. When the denitration catalyst is deteriorated, regeneration, replacement, or addition of the denitration catalyst is performed, and the denitration catalyst is altered as necessary. When the denitration catalyst is usable, the denitration catalyst is not replaced nor regenerated.Type: GrantFiled: October 30, 2003Date of Patent: January 25, 2011Assignee: The Chugoku Electric Power Co., Inc.Inventors: Hiroshi Shimada, Yousuke Oka
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Patent number: 7871823Abstract: Data on a secular change of each denitration catalyst is managed based on data obtained by a periodic maintenance and a daily management. Management of a secular change and prediction on performance variations that occur until a next periodic check is performed. It is determined whether the denitration catalyst is deteriorated such that an exhaust-gas denitration system cannot maintain its performance. When the denitration catalyst is deteriorated, regeneration, replacement, or addition of the denitration catalyst is performed, and the denitration catalyst is altered as necessary. When the denitration catalyst is usable, the denitration catalyst is not replaced nor regenerated.Type: GrantFiled: March 26, 2009Date of Patent: January 18, 2011Assignee: The Chugoku Electric Power Co., Inc.Inventors: Hiroshi Shimada, Yousuke Oka
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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: 20100326974Abstract: 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: ApplicationFiled: January 11, 2008Publication date: December 30, 2010Applicants: MITSUBISHI HEAVY INDUSTRIES, LTD., THE JAPAN ATOMIC POWER COMPANY, HOKKAIDO ELECTRIC POWER COMPANY, INCORPORATED, 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.Inventors: Takahiro Ota, Kazuhiko Kamo, Itaru Muroya, Seiji Asada, Kazuhiro Wakabayashi, Koji Okimura, Hironori Onitsuka
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Patent number: 7813906Abstract: A method that utilizes signals from an accelerometer in resonant frequency bands or high frequency bands to, in a cost-effective manner, measure wear particle penetration of lubricant and lubricant degradation, both of which greatly affect prediction of residual service life; and, using as a basis these measurements of wear particle penetration and lubricant degradation, enables accurate estimation of residual service life for rolling bearings in the early stages.Type: GrantFiled: May 28, 2003Date of Patent: October 12, 2010Assignees: The Chugoku Electric Power Co., Inc.Inventors: Isao Shiromaru, Makoto Tanaka, Yoshinobu Akamatsu, Yoji Nagayasu, Shingo Boda, Takuzo Iwatsubo
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Patent number: 7780143Abstract: An object is to provide a gate valve capable of preventing operational deficiencies caused by particulate materials accumulating in a valve box, thus providing superior sealing properties and high durability, having a simple structure, and allowing inspection and maintenance to be performed easily.Type: GrantFiled: November 29, 2007Date of Patent: August 24, 2010Assignees: Mitsubishi Heavy Industries, Ltd., Hirata Valve Industry Co., Ltd., Clean Coal Power R&D Co., Ltd., Hokkaido Electric Power Co., Incorporated, Tohoku Electric Power Co., Inc., The Tokyo Electric Power Co., Inc., Chubu Electric Power Co., Inc., Hokuriku Electric Power Co., 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: Yasunari Shibata, Yoshinori Koyama, Soken Takase, Taizo Hoshino, Shuji Kameyama, Yasuhiro Suzuki, Yoshihiko Horie, Hitoshi Terada, Hirofumi Yamada
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Patent number: 7759122Abstract: The present invention provides a method of testing an NOx removal catalyst, which method enables assessment of actual catalytic performance in consideration of gas flow condition in the gas conduits of the NOx removal catalyst.Type: GrantFiled: June 21, 2005Date of Patent: July 20, 2010Assignee: The Chugoku Electric Power Co., Inc.Inventors: Tsuyoshi Chiyonobu, Hatsumi Chiyonobu, legal representative, Hiroshi Shimada
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Patent number: 7730796Abstract: An object of the invention is to realize high-accuracy analysis of a flue gas in terms of a trace amount of ammonia so as to control the level of ammonia gas to be added to a flue gas NOx removal apparatus. Since the ammonia gas to be determined is a highly absorbable, the gas component is considerably adsorbed on a surface of the flue gas sampling tube during sampling of flue gas. When a conventional sampling method including heating a gas sampling tube is employed, the amount of sampled gas is reduced through adsorption during gas sampling, failing to obtain concentration values at high accuracy. Thus, a high-accuracy gas sampling method replacing a conventional, heating-based method includes completely washing out, with an absorption liquid therefor serving as a washing liquid, a target ammonia gas deposited on the inner wall of a flue gas sampling tube (2), whereby the gas component is thoroughly collected. Through analysis of the thus-obtained washing liquid, high-accuracy analysis can be attained.Type: GrantFiled: April 1, 2004Date of Patent: June 8, 2010Assignee: The Chugoku Electric Power Co., Inc.Inventors: Hiroshi Shimada, Shinya Tamura, Naoyuki Tokunaga, Megumi Kikkawa
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Patent number: 7704456Abstract: To provide an NOx removal catalyst management unit for use with an NOx removal apparatus, the management unit detecting an NOx removal catalyst layer that is actually deteriorated, whereby the deteriorated catalyst layer can be effectively replaced by a new catalyst layer, and to provide a method for managing the NOx removal catalyst. The management unit for managing a plurality of NOx removal catalyst layers provided in a flue gas NOx removal apparatus includes NOx measurement means 16A through 16E for determining NOx concentrations on the inlet and outlet sides of respective NOx removal catalyst layers 14A through 14D; NH3 measurement means 17A through 17E for determining NH3 concentrations on the inlet and outlet sides of the same NOx removal catalyst layers; and percent NOx removal determination means 18 for determining percent NOx removal (?) on the basis of an inlet mole ratio (i.e., inlet NH3/inlet NOx).Type: GrantFiled: June 13, 2003Date of Patent: April 27, 2010Assignee: The Chugoku Electric Power Co., Inc.Inventor: Shigeo Shirakura
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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: 7559240Abstract: Degradation of the lubricant due to contamination of the lubricant with wear particles or moisture, which greatly affects the service life of rolling bearings, can be detected in a cost-effective manner through the use of a resonance frequency band signal or high-frequency signal of an accelerometer, and the service life of a rolling bearing can be estimated with high precision at an early stage on the basis of the detected state of the wear particles and lubricant.Type: GrantFiled: March 29, 2005Date of Patent: July 14, 2009Assignees: Chugoku Electric Power Co., Inc.Inventors: Takuzo Iwatsubo, Isao Shiromaru, Makoto Tanaka, Yoshibobu Akamatsu, Hideko Nagayasu, legal representative, Shingo Boda, Yoji Nagayasu
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Publication number: 20090155132Abstract: The present invention provides a honeycomb catalyst and an NOx removal catalyst for use in an NOx removal apparatus which can be employed at high efficiency, and a flue gas NOx removal apparatus, whereby the running cost of a flue gas NOx removal system in terms of the NOx removal catalyst is reduced by about one-half. The honeycomb catalyst having gas conduits for feeding a gas to be treated from an inlet to an outlet of each conduit and performing gas treatment on the sidewalls of the conduit, wherein the honeycomb catalyst has an approximate length such that the flow of the gas to be treated which has been fed into the gas conduits is straightened in the vicinity of the outlet.Type: ApplicationFiled: December 11, 2008Publication date: June 18, 2009Applicant: THE CHUGOKU ELECTRIC POWER CO., INC.Inventor: Shigeo SHIRAKURA
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Publication number: 20090140195Abstract: An object is to provide a gate valve capable of preventing operational deficiencies caused by particulate materials accumulating in a valve box, thus providing superior sealing properties and high durability, having a simple structure, and allowing inspection and maintenance to be performed easily.Type: ApplicationFiled: November 29, 2007Publication date: June 4, 2009Applicants: MITSUBISHI HEAVY INDUSTRIES, LTD., HIRATA VALVE INDUSTRY CO., LTD., Clean Coal Power R&D Co., LTD., Hokkaido Electric Power Company, Incorporated, Tohoku Electric Power Co., Inc., THE TOKYO ELECTRIC POWER COMPANY, INCORPORATED, 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: Yasunari Shibata, Yoshinori Koyama, Soken Takase, Taizo Hoshino, Shuji Kameyama, Yasuhiro Suzuki, Yoshihiko Horie, Hitoshi Terada, Hirofumi Yamada
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Publication number: 20080307704Abstract: It is an object to solve a bypass line corrosion problem effectively, enable prompt supply of a fuel gas into a bypass line in the event of an emergency, and provide an inexpensive coal gasification plant. An integrated coal gasification combined cycle power generation plant includes a coal gasification furnace, a dust remover, a gas refiner, a gas turbine and the like, a main system line connecting therebetween, and a bypass line connecting between the outlet side of the coal gasification furnace in the main system line and a flare stack, wherein a dust remover bypass valve which is disposed in an upstream portion of the bypass line and which opens and closes the bypass line, a treatment gas control valve which is disposed in a downstream portion of the bypass line and which controls the flow rate, and a first inert gas input line which is disposed downstream from the dust remover bypass valve and which supplies the inert gas to the bypass line are provided.Type: ApplicationFiled: June 12, 2007Publication date: December 18, 2008Applicants: CLEAN COAL POWER R&D CO., LTD., MITSUBISHI HEAVY INDUSTRIES, LTD., HOKKAIDO ELECTRIC POWER COMPANY, INCORPORATED, TOHOKU ELECTRIC POWER CO., INC., THE TOKYO ELECTRIC POWER COMPANY, INCORPORATED, 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: Yuichiro Kitagawa, Osamu Shinada, Jun Wada, Yuso Oki, Naomitsu Hiratsuka, Atsushi Kimura, Katsutoshi Hiruma
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Patent number: 7441332Abstract: To provide a method for recovering performance of a discharge gas processing apparatus, the method being capable of recovering NOx removal performance of a deteriorated NOx removal catalyst without replacing the deteriorated NOx removal catalyst with a new catalyst and without adding a new catalyst. After a honeycomb catalyst 1 having gas conduits for feeding a gas to be treated has been placed and used in a discharge gas conduit of a discharge gas processing apparatus 10, the honeycomb catalyst 1 is rearranged such that a portion of the honeycomb catalyst 1—the portion being on the upstream side in terms of the flow of the gas to be treated and extending to cover a predetermined range is transferred from the inlet side of the discharge gas conduit.Type: GrantFiled: December 11, 2003Date of Patent: October 28, 2008Assignee: The Chugoku Electric Power Co., Inc.Inventors: Hiroshi Shimada, Yousuke Oka
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Publication number: 20070243619Abstract: The present invention provides a method of testing an NOx removal catalyst, which method enables assessment of actual catalytic performance in consideration of gas flow condition in the gas conduits of the NOx removal catalyst.Type: ApplicationFiled: June 21, 2005Publication date: October 18, 2007Applicant: THE CHUGOKU ELECTRIC POWER CO., INC.Inventors: Tsuyoshi Chiyonobu, Hatsumi Chiyonobu, Hiroshi Shimada
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Patent number: 7221899Abstract: A customer support system for improving the skill of a person engaged in a business with reduced cost for technical training support and enhancing practical training. The customer support system includes a computer system for introducing training contents from a service providing side to a customer side through a computer network; an instructor training facility for training an instructor based on training contents; and a remote technique training support device for the instructor, for supporting technical training on the customer side, from the service providing side, through the computer network.Type: GrantFiled: January 30, 2003Date of Patent: May 22, 2007Assignees: Mitsubishi Denki Kabushiki Kaisha, Chugoku Electric Power Co., Inc.Inventors: Hiroaki Ohno, Mitsuo Katagiri, Isao Shiromaru, Noriaki Suginohara
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Patent number: 7139735Abstract: A system for preparing an administration plan using a computer, includes an inputting function, a risk calculating function, an optimizing function, and an outputting function. The optimizing function prepares the administration plan by optimizing and adjusting distribution between investment levels in investment items and the risk levels for a planning term.Type: GrantFiled: April 7, 2003Date of Patent: November 21, 2006Assignees: Mitsubishi Denki Kabushiki Kaisha, Chugoku Electric Power Co., Inc.Inventors: Hiroaki Ohno, Kenji Hirai, Isao Shiromaru