Patents by Inventor Satoru Shishido
Satoru Shishido has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11577201Abstract: A control device for controlling a flue gas denitrizer including a reductant supply part for supplying a reductant to an exhaust gas passage to which an exhaust gas from a boiler is introduced. The control device comprises: a storage part which stores a plurality of opening degree patterns of a plurality of first valves corresponding to a plurality of operational states of the boiler respectively; an opening degree pattern acquisition part configured to acquire an opening degree pattern corresponding to a present operational state of the boiler among the plurality of opening degree patterns from the storage part; and a first valve control part configured to regulate an opening degree of each of the plurality of first valves, on the basis of the opening degree pattern acquired by the opening degree pattern acquisition part.Type: GrantFiled: February 1, 2022Date of Patent: February 14, 2023Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Tsuyoshi Hirai, Satoru Shishido, Tsuyoshi Yamaguchi
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Publication number: 20220297061Abstract: A control device for controlling a flue gas denitrizer including a reductant supply part for supplying a reductant to an exhaust gas passage to which an exhaust gas from a boiler is introduced. The control device comprises: a storage part which stores a plurality of opening degree patterns of a plurality of first valves corresponding to a plurality of operational states of the boiler respectively; an opening degree pattern acquisition part configured to acquire an opening degree pattern corresponding to a present operational state of the boiler among the plurality of opening degree patterns from the storage part; and a first valve control part configured to regulate an opening degree of each of the plurality of first valves, on the basis of the opening degree pattern acquired by the opening degree pattern acquisition part.Type: ApplicationFiled: February 1, 2022Publication date: September 22, 2022Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Tsuyoshi Hirai, Satoru Shishido, Tsuyoshi Yamaguchi
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Patent number: 11441774Abstract: A method for operating a flue gas purification system, comprising, in the flue gas purification system, equipped with a boiler which can burn oil fuel and coal fuel either simultaneously or switching therebetween, a denitration equipment having a reducing agent injector and a catalytic reactor, an inlet flue to guide flue gas discharged from the boiler to the denitration equipment, an outlet flue to guide flue gas discharged from the denitration equipment, a bypass flue which can guide flue gas from the inlet flue to the outlet flue so as to bypass the denitration equipment, and a bypass damper, opening the bypass damper and burning oil fuel in the boiler being in condition not yet suitable for coal combustion to allow the flue gas discharged from the boiler to dividedly flow to the denitration equipment and the bypass flue, switching the oil fuel to coal fuel when the boiler is in condition suitable for coal combustion to burn the coal fuel in the boiler, closing the bypass damper after switching the oil fueType: GrantFiled: May 11, 2017Date of Patent: September 13, 2022Assignee: MITSUBISHI POWER, LTD.Inventors: Shinya Ii, Akira Hirota, Satoru Shishido, Katsuhiro Yashiro, Hiroyuki Yoshimura, Nobuaki Shimizu
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Patent number: 11408318Abstract: An exhaust gas purification device is disclosed provided with a denitration catalyst for reducing and removing nitrogen oxides in exhaust gas using ammonia as a reducing agent in a gas flow passage through which the exhaust gas discharged from a boiler flows, and which injects ammonia into the exhaust gas flowing through the gas flow passage on an upstream side of the denitration catalyst, including multiple disturbing plate support members, and a disturbing plate. The multiple disturbing plate support members are fixedly provided on a downstream side of the denitration catalyst and arranged extending linearly in a flow path cross section to cross the gas flow passage. The disturbing plate includes an exhaust gas flow facing surface exposed on an upstream side and is fixed to the disturbing plate support members so that a position thereof in the flow path cross section can be changed.Type: GrantFiled: August 30, 2019Date of Patent: August 9, 2022Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Hiroyuki Yoshimura, Katsumi Yano, Katsuhiro Yashiro, Akihiro Yamada, Satoru Shishido, Hironori Kishi
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Publication number: 20220126280Abstract: It is an object to provide a regenerated denitration catalyst whose denitration performance is restored compared with a denitration catalyst before use, utilizing a spent denitration catalyst, and a method for manufacturing the same. In a regenerated denitration catalyst according to the present disclosure, a spent denitration catalyst including a first titanium oxide as a main component, and a second titanium oxide are mixed. The spent denitration catalyst is already used in a denitration reaction in which nitrogen oxides in a gas are decomposed into nitrogen and water using a reducing agent. The second titanium oxide has a larger specific surface area per unit weight than the first titanium oxide. A content of the second titanium oxide based on a total weight of the first titanium oxide and the second titanium oxide is preferably 10% by weight or more and 90% by weight or less.Type: ApplicationFiled: December 2, 2020Publication date: April 28, 2022Applicant: Mitsubishi Power, Ltd.Inventors: Satoru Shishido, Yu Urabe, Takuma Kurai, Hiroshi Kako, Katsumi Nochi
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Publication number: 20210254527Abstract: An exhaust gas purification device is disclosed provided with a denitration catalyst for reducing and removing nitrogen oxides in exhaust gas using ammonia as a reducing agent in a gas flow passage through which the exhaust gas discharged from a boiler flows, and which injects ammonia into the exhaust gas flowing through the gas flow passage on an upstream side of the denitration catalyst, including multiple disturbing plate support members, and a disturbing plate. The multiple disturbing plate support members are fixedly provided on a downstream side of the denitration catalyst and arranged extending linearly in a flow path cross section to cross the gas flow passage. The disturbing plate includes an exhaust gas flow facing surface exposed on an upstream side and is fixed to the disturbing plate support members so that a position thereof in the flow path cross section can be changed.Type: ApplicationFiled: August 30, 2019Publication date: August 19, 2021Applicant: Mitsubishi Power, Ltd.Inventors: Hiroyuki Yoshimura, Katsumi Yano, Katsuhiro Yashiro, Akihiro Yamada, Satoru Shishido, Hironori Kishi
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Publication number: 20200149741Abstract: A method for operating a flue gas purification system, comprising, in the flue gas purification system, equipped with a boiler which can burn oil fuel and coal fuel either simultaneously or switching therebetween, a denitration equipment having a reducing agent injector and a catalytic reactor, an inlet flue to guide flue gas discharged from the boiler to the denitration equipment, an outlet flue to guide flue gas discharged from the denitration equipment, a bypass flue which can guide flue gas from the inlet flue to the outlet flue so as to bypass the denitration equipment, and a bypass damper, opening the bypass damper and burning oil fuel in the boiler being in condition not yet suitable for coal combustion to allow the flue gas discharged from the boiler to dividedly flow to the denitration equipment and the bypass flue, switching the oil fuel to coal fuel when the boiler is in condition suitable for coal combustion to burn the coal fuel in the boiler, closing the bypass damper after switching the oil fueType: ApplicationFiled: May 11, 2017Publication date: May 14, 2020Applicant: MITSUBISHI HITACHI POWER SYSTEMS, LTD.Inventors: Shinya Ii, Akira Hirota, Satoru Shishido, Katsuhiro Yashiro, Hiroyuki Yoshimura, Nobuaki Shimizu
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Patent number: 9664383Abstract: There is provided a denitrification apparatus capable of reducing NOx from a combustion facility and preventing evaporation of a reducing liquid in a lance and an injection nozzle in the combustion facility in operation at a low load by adjusting concentration of a reducing agent, thereby achieving complete evaporation of the reducing liquid in an exhaust gas duct.Type: GrantFiled: May 29, 2014Date of Patent: May 30, 2017Assignee: BABOCK-HITACHI KABUSHIKI KAISHAInventors: Hiroshi Yamakaji, Ryosuke Nakagawa, Satoru Shishido, Toru Ogasahara
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Publication number: 20140356236Abstract: There is provided a denitrification apparatus capable of reducing NOx from a combustion facility and preventing evaporation of a reducing liquid in a lance and an injection nozzle in the combustion facility in operation at a low load by adjusting concentration of a reducing agent, thereby achieving complete evaporation of the reducing liquid in an exhaust gas duct.Type: ApplicationFiled: May 29, 2014Publication date: December 4, 2014Applicant: BABCOCK-HITACHI KABUSHIKI KAISHAInventors: Hiroshi YAMAKAJI, Ryosuke NAKAGAWA, Satoru SHISHIDO, Toru OGASAHARA
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Patent number: 8834801Abstract: A vertical downflow type flue gas denitrification apparatus which has a plurality of catalyst blocks, each incorporating a catalyst unit provided therein, is provided with a first ash accumulation baffle plate and a second ash accumulation baffle plate which are slidable into a gap between catalyst blocks adjacent to each other, and processes an exhaust gas emitted from a combustor and turned to a vertical downflow. The denitrification apparatus has a simple configuration where the ash accumulation baffle plates prevent ash or the like from being accumulated in the gap between the catalyst blocks. The thermal expansion of the ash accumulation baffle plate can be absorbed even under the operating conditions which produce a change in temperature, and charging and replacing the catalyst in the catalyst blocks are possible without on-site welding of the ash accumulation baffle plates.Type: GrantFiled: July 5, 2011Date of Patent: September 16, 2014Assignee: Babcock-Hitachi Kabushiki KaishaInventors: Tomokazu Harada, Satoru Shishido, Toru Ogasahara
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Publication number: 20130071296Abstract: A vertical downflow type flue gas denitrification apparatus which has a plurality of catalyst blocks, each incorporating a catalyst unit provided therein, is provided with a first ash accumulation baffle plate and a second ash accumulation baffle plate which are slidable into a gap between catalyst blocks adjacent to each other, and processes an exhaust gas emitted from a combustor and turned to a vertical downflow. The denitrification apparatus has a simple configuration where the ash accumulation baffle plates prevent ash or the like from being accumulated in the gap between the catalyst blocks. The thermal expansion of the ash accumulation baffle plate can be absorbed even under the operating conditions which produce a change in temperature, and charging and replacing the catalyst in the catalyst blocks are possible without on-site welding of the ash accumulation baffle plates.Type: ApplicationFiled: July 5, 2011Publication date: March 21, 2013Applicant: BABCOCK-HITACHI KABUSHIKI KAISHAInventors: Tomokazu Harada, Satoru Shishido, Toru Ogasahara
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Publication number: 20110033360Abstract: Provided is a method of operating a hydrolytic separator in which ammonia gas to be used as a reducing agent in a flue gas denitrization apparatus is generated by the hydrolysis of an aqueous urea solution. When the hydrolytic separator is started and ammonia gas injection is initiated, the hydrolytic separator is operated in a constant-pressure mode in which the internal pressure of the hydrolytic separator is kept constant regardless of the increasing temperature of the hydrolytic separator. Thereafter, the constant-pressure operation is switched to a variable pressure operation in which the pressure is raised as the temperature of the hydrolytic separator rises. In the method, the constant-pressure operation is switched to the variable pressure operation after the temperature of the hydrolytic separator in the constant-pressure operation has reached or exceeded the variable pressure operation temperature corresponding to that pressure.Type: ApplicationFiled: May 27, 2009Publication date: February 10, 2011Applicant: BABCOCK-HITACHI KABUSHIKI KAISHAInventors: Satoru Shishido, Tooru Ogasahara, Yoshiyuki Takeuchi, Yoshinori Nagai
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Patent number: 7303730Abstract: An apparatus having a baffle device and used for treating an exhaust gas, the apparatus comprising: (a) an inlet duct through which the exhaust gas is flowed in, (b) a bend portion, and (c) a catalyst duct connected to the inlet duct through the bend portion and having a catalyst disposed therein and used for purifying the exhaust gas and, the baffle device being a baffle lattice having a height of A and disposed at the inlet of the catalyst duct in the direction of the cross section of the catalyst duct, wherein the baffle lattice is provided, for supporting the lattice, with an outer frame having a height of B and disposed so that the upper ends of the outer frame become the same level with the upper ends of the baffle lattice; the outer frame is provided, on its lower ends for supporting the frame, with beams; and the relation between the height A and the height B satisfies the following equation: A<B, in which apparatus, occurrence of channeling (nonuniform flow distribution) of an exhaust gas atType: GrantFiled: July 27, 2001Date of Patent: December 4, 2007Assignee: Babcock-Hitachi Kabushiki KaishaInventors: Satoru Shishido, Takao Asami, Masato Mukai, Katsuhiro Yashio
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Patent number: 7097814Abstract: An apparatus for treating an exhaust gas comprising: (a) an inlet duct through which the exhaust gas is flowed in, (b) a bend portion, and (c) a catalyst duct connected to the inlet duct through the bend portion, and having a catalyst for purifying the exhaust gas and disposed in the catalyst duct, a baffle structure comprising plural baffle plates disposed at the inlet of the catalyst duct in the direction of the cross section of the catalyst duct, wherein the plural baffle plates are formed and arranged so that the heights of the baffle plates gradually increase in the direction from the side of the inlet duct toward the extremity of the bend portion to make the flow distribution of the exhaust gas uniform in the direction of the cross section of the catalyst duct at the outlets of the exhaust gas in the baffle structure.Type: GrantFiled: July 27, 2001Date of Patent: August 29, 2006Assignee: Babcock-Hitachi Kabushiki KaishaInventors: Satoru Shishido, Katsuhiro Yashiro
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Publication number: 20030175175Abstract: An apparatus having a baffle structure and used for treating an exhaust gas, the apparatus comprising:Type: ApplicationFiled: May 8, 2003Publication date: September 18, 2003Inventors: Satoru Shishido, Katsuhiro Yashiro