Patents by Inventor Keiji Fujikawa
Keiji Fujikawa 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).
-
Publication number: 20230406746Abstract: A waste treatment system, includes: at least one reformer for hydrolyzing waste; a microbial reactor for microbially degrading a reformed material containing at least a solid of the waste hydrolyzed by the at least one reformer; a microbial reaction detection device for detecting a state of degradation of the reformed material in the microbial reactor; and an adjustment device for adjusting amount and timing of supply of the reformed material to the microbial reactor, based on a detected value of the microbial reaction detection device.Type: ApplicationFiled: September 21, 2021Publication date: December 21, 2023Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Akira Noma, Kazuhiro Kawai, Keiji Fujikawa, Susumu Okino, Shinichi Okamoto, Shinji Nakamura, Kouetsu Shizukuishi, Nobuyuki Ukai, Yuuji Nakajima, Keiichi Nakagawa, Haruka Adachi, Takashi Ike, Yosuke Nakagawa
-
Publication number: 20230356275Abstract: A waste treatment system includes: at least one reformer for hydrolyzing waste with steam; a microbial reactor for microbially degrading a reformed material containing at least a solid of the waste hydrolyzed by the at least one reformer; and at least one steam generation device for generating the steam by using only combustion energy of a gas produced in the microbial reactor.Type: ApplicationFiled: September 21, 2021Publication date: November 9, 2023Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Kazuhiro Kawai, Akira Noma, Keiji Fujikawa, Susumu Okino
-
Publication number: 20230257783Abstract: A waste treatment system includes: at least one reformer for hydrolyzing waste; and a microbial reactor for microbially degrading a reformed material containing at least a solid among the waste hydrolyzed in the at least one reformer.Type: ApplicationFiled: June 30, 2021Publication date: August 17, 2023Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Akira Noma, Kazuhiro Kawai, Keiji Fujikawa, Susumu Okino, Yosuke Nakagawa, Koichi Fukunaga, Keiichi Nakagawa, Haruka Adachi, Takashi Ike, Ryo Kamito, Masahiro Yamada
-
Patent number: 9662607Abstract: A CO2 recovery unit includes an absorber that reduces CO2 in flue gas (101) discharged from a combustion facility (50) by absorbing CO2 by an absorbent, a regenerator that heats the absorbent having absorbed CO2 to emit CO2, and regenerates and supplies the absorbent to the absorber, and a regenerating heater that uses steam (106) supplied from the combustion facility (50) for heating the absorbent in the regenerator and returns heated condensed water (106a) to the combustion facility (50). The CO2 recovery unit further includes a condensed water/flue gas heat exchanger (57) that heats the condensed water (106a) to be returned from the regenerating heater to the combustion facility (50) by heat-exchanging the condensed water (106a) with the flue gas (101) in a flue gas duct (51) in the combustion facility (50).Type: GrantFiled: June 1, 2016Date of Patent: May 30, 2017Assignees: MITSUBISHI HEAVY INDUSTRIES, LTD., THE KANSAI ELECTRIC POWER CO., INC.Inventors: Tatsuya Tsujiuchi, Hiromitsu Nagayasu, Takuya Hirata, Keiji Fujikawa, Tetsuya Imai, Hiroshi Tanaka, Tsuyoshi Oishi, Masahiko Tatsumi, Yasuyuki Yagi, Kazuhiko Kaibara
-
Publication number: 20160271557Abstract: A CO2 recovery unit includes an absorber that reduces CO2 in flue gas (101) discharged from a combustion facility (50) by absorbing CO2 by an absorbent, a regenerator that heats the absorbent having absorbed CO2 to emit CO2, and regenerates and supplies the absorbent to the absorber, and a regenerating heater that uses steam (106) supplied from the combustion facility (50) for heating the absorbent in the regenerator and returns heated condensed water (106a) to the combustion facility (50). The CO2 recovery unit further includes a condensed water/flue gas heat exchanger (57) that heats the condensed water (106a) to be returned from the regenerating heater to the combustion facility (50) by heat-exchanging the condensed water (106a) with the flue gas (101) in a flue gas duct (51) in the combustion facility (50).Type: ApplicationFiled: June 1, 2016Publication date: September 22, 2016Applicants: MITSUBISHI HEAVY INDUSTRIES, LTD., THE KANSAI ELECTRIC POWER CO., INC.Inventors: Tatsuya Tsujiuchi, Hiromitsu Nagayasu, Takuya Hirata, Keiji Fujikawa, Tetsuya Imai, Hiroshi Tanaka, Tsuyoshi Oishi, Masahiko Tatsumi, Yasuyuki Yagi, Kazuhiko Kaibara
-
Publication number: 20160236145Abstract: The present invention provides a flue gas treatment method and a denitration and SO3 reduction apparatus configured to efficiently reduce the concentration of SO3 in a combustion flue gas and also efficiently reduce NOx in the combustion flue gas at treatment costs lower than those of conventional methods. The flue gas treatment method performs a treatment for reducing SO3 into SO2 by adding a compound including the elements H and C to a combustion flue gas including SO3 as well as NOx in an oxygen atmosphere as a first additive, and then by bringing the combustion flue gas into contact with a catalyst including an oxide constituted by one or more of elements selected from the group consisting of Ti, Si, Zr, and Ce and/or a mixed oxide and/or a complex oxide including two or more of the elements selected from the group as a carrier.Type: ApplicationFiled: June 17, 2015Publication date: August 18, 2016Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Koji HIGASHINO, Akihiro SAWATA, Keiji FUJIKAWA, Masanao YONEMURA
-
Patent number: 9383101Abstract: A CO2 recovery unit includes an absorber that reduces CO2 in flue gas (101) discharged from a combustion facility (50) by absorbing CO2 by an absorbent, a regenerator that heats the absorbent having absorbed CO2 to emit CO2, and regenerates and supplies the absorbent to the absorber, and a regenerating heater that uses steam (106) supplied from the combustion facility (50) for heating the absorbent in the regenerator and returns heated condensed water (106a) to the combustion facility (50). The CO2 recovery unit further includes a condensed water/flue gas heat exchanger (57) that heats the condensed water (106a) to be returned from the regenerating heater to the combustion facility (50) by heat-exchanging the condensed water (106a) with the flue gas (101) in a flue gas duct (51) in the combustion facility (50).Type: GrantFiled: January 11, 2011Date of Patent: July 5, 2016Assignees: MITSUBISHI HEAVY INDUSTRIES, LTD., THE KANSAI ELECTRIC POWER CO., INC.Inventors: Tatsuya Tsujiuchi, Hiromitsu Nagayasu, Takuya Hirata, Keiji Fujikawa, Tetsuya Imai, Hiroshi Tanaka, Tsuyoshi Oishi, Masahiko Tatsumi, Yasuyuki Yagi, Kazuhiko Kaibara
-
Patent number: 9186619Abstract: A CO2 recovery unit 10A according to a first embodiment has a CO2 absorber that removes CO2 in flue gas by bringing the flue gas containing CO2 into contact with a CO2 absorbent 12, and a regenerator 15 that diffuses CO2 in a rich solution 14 having absorbed CO2 in the CO2 absorber. The CO2 recovery unit 10A includes a first compressor 29-1 to a fourth compressor 29-4 that compress CO2 gas 16 discharged from the regenerator 15, a dehydrating column 33 that reduces moisture in the CO2 gas 16 by bringing the CO2 gas 16 into contact with a dehydrating agent 32, a combustion removal unit 41 that removes the dehydrating agent 32 mixed in the CO2 gas 16 in the dehydrating column 33, and a heat exchanger 42 that performs heat exchange between the CO2 gas 16 discharged from the third compressor 29-3 and the CO2 gas 16 discharged from the dehydrating column 33.Type: GrantFiled: December 21, 2009Date of Patent: November 17, 2015Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Takuya Hirata, Keiji Fujikawa, Tatsuya Tsujiuchi, Tsuyoshi Oishi
-
Patent number: 9084961Abstract: A gas-liquid contacting plate of the present invention in which a treatment liquid flows from an upper side to a lower side direction of a substrate and a part of gas being in contact with the treatment liquid is absorbed into the treatment liquid, includes a downward protruding saw teeth-shaped portion in which a lower end side of the substrate has pitches at predetermined gaps. Further, a pore group for liquid dispersion having a predetermined gap is provided in a plurality of lines, in the substrate. An arrangement thereof is a zigzag arrangement.Type: GrantFiled: December 8, 2011Date of Patent: July 21, 2015Assignees: MITSUBISHI HEAVY INDUSTRIES, LTD., KABUSHIKI KAISHA MEIJI GOMU KASEIInventors: Tatsuya Tsujiuchi, Hiromitsu Nagayasu, Hiroshi Tanaka, Takuya Hirata, Keiji Fujikawa, Ryuji Yoshiyama, Yuichiro Sato, Toyoshi Nakagawa, Tsuyoshi Oishi, Motomichi Ochiai, Kei Shioya, Shunji Ichikawa, Akihiro Kojima
-
Patent number: 8992871Abstract: A CO shift catalyst according to the present invention reforms carbon monoxide (CO) contained in gas. The CO shift catalyst is prepared from one or both of molybdenum (Mo) and cobalt (Co) as an active ingredient and an oxide of one of, or a mixture or a compound of, titanium (Ti), silicon (Si), zirconium (Zr), and cerium (Ce) as a carrier for supporting the active ingredient. The CO shift catalyst can be used in a halogen-resistant CO shift reactor (15) that converts CO contained in gasified gas (12) generated in a gasifier (11) into CO2.Type: GrantFiled: April 10, 2009Date of Patent: March 31, 2015Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Toshinobu Yasutake, Tetsuya Imai, Masanao Yonemura, Susumu Okino, Keiji Fujikawa, Shinya Tachibana
-
Patent number: 8887505Abstract: Provided are high-pressure, medium-pressure, and low-pressure turbines; a boiler to generate steam for driving the turbines; a carbon dioxide recovery unit including an absorber that reduces carbon dioxide in combustion flue gas from the boiler by a carbon dioxide absorbent and a regenerator that regenerates an absorbent; a first auxiliary turbine that extracts steam from an inlet of the low-pressure turbine and recovers power by the steam thus extracted; a first steam delivery line to supply discharged steam from the first auxiliary turbine to a reboiler of the regenerator as a heat source; and a controller that controls driving of the first auxiliary turbine while keeping pressure of the discharged steam to be supplied to the reboiler within a tolerance range for the reboiler's optimum pressure corresponding to a fluctuation in an operation load of the boiler.Type: GrantFiled: December 18, 2009Date of Patent: November 18, 2014Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Masaki Iijima, Tetsuya Imai, Keiji Fujikawa, Tatsuya Tsujiuchi, Tsuyoshi Oishi, Hiroshi Tanaka
-
Publication number: 20130127075Abstract: A gas-liquid contacting plate of the present invention in which a treatment liquid flows from an upper side to a lower side direction of a substrate and a part of gas being in contact with the treatment liquid is absorbed into the treatment liquid, includes a downward protruding saw teeth-shaped portion in which a lower end side of the substrate has pitches at predetermined gaps. Further, a pore group for liquid dispersion having a predetermined gap is provided in a plurality of lines, in the substrate. An arrangement thereof is a zigzag arrangement.Type: ApplicationFiled: December 8, 2011Publication date: May 23, 2013Applicants: KABUSHIKI KAISHA MEIJI GOMU KASEI, MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Tatsuya Tsujiuchi, Hiromitsu Nagayasu, Hiroshi Tanaka, Takuya Hirata, Keiji Fujikawa, Ryuji Yoshiyama, Yuichiro Sato, Toyoshi Nakagawa, Tsuyoshi Oishi, Motomichi Ochiai, Kei Shioya, Shunji Ichikawa, Akihiro Kojima
-
Patent number: 8377184Abstract: A CO2 recovery apparatus according to a first embodiment of the present invention includes: a CO2 absorber that brings flue gas containing CO2 into contact with CO2 absorbing liquid to reduce CO2 in the flue gas; a regenerator that reduces CO2 in CO2 absorbing liquid (rich solvent) that has absorbed the CO2 in the CO2 absorber to regenerate the CO2 absorbing liquid, so that the regenerated absorbing liquid (lean solvent), having CO2 reduced in the regenerator, is reused in the CO2 absorber; a first compressor to a fourth compressor that compress the CO2 gas released from the regenerator; and an O2 reducing apparatus arranged between the second compressor and a second cooler to reduce O2 in the CO2 gas.Type: GrantFiled: October 27, 2009Date of Patent: February 19, 2013Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Keiji Fujikawa, Takuya Hirata, Tatsuya Tsujiuchi, Tsuyoshi Oishi
-
Publication number: 20120318141Abstract: A CO2 recovery unit includes an absorber that reduces CO2 in flue gas (101) discharged from a combustion facility (50) by absorbing CO2 by an absorbent, a regenerator that heats the absorbent having absorbed CO2 to emit CO2, and regenerates and supplies the absorbent to the absorber, and a regenerating heater that uses steam (106) supplied from the combustion facility (50) for heating the absorbent in the regenerator and returns heated condensed water (106a) to the combustion facility (50). The CO2 recovery unit further includes a condensed water/flue gas heat exchanger (57) that heats the condensed water (106a) to be returned from the regenerating heater to the combustion facility (50) by heat-exchanging the condensed water (106a) with the flue gas (101) in a flue gas duct (51) in the combustion facility (50).Type: ApplicationFiled: January 11, 2011Publication date: December 20, 2012Applicants: THE KANSAI ELECTRIC POWER CO., INC., MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Tatsuya Tsujiuchi, Hiromitsu Nagayasu, Takuya Hirata, Keiji Fujikawa, Tetsuya Imai, Hiroshi Tanaka, Tsuyoshi Oishi, Masahiko Tatsumi, Yasuyuki Yagi, Kazuhiko Kaibara
-
Publication number: 20120058036Abstract: A CO shift catalyst according to the present invention reforms carbon monoxide (CO) and is prepared from one or a mixture of platinum (Pt), ruthenium (Ru), iridium (Ir), and rhodium (Rh) as an active ingredient and at least one of titanium (Ti), aluminum (Al), zirconium (Zr), and cerium (Ce) as a carrier for supporting the active ingredient. The CO shift catalyst can be used in a halogen-resistant CO shift reactor (15) that converts CO contained in gasified gas (12) generated in a gasifier (11) into CO2.Type: ApplicationFiled: May 15, 2009Publication date: March 8, 2012Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Toshinobu Yasutake, Tetsuya Imai, Masanao Yonemura, Susumu Okino, Keiji Fujikawa, Shinya Tachibana
-
Publication number: 20120027659Abstract: A CO shift catalyst according to the present invention reforms carbon monoxide (CO) contained in gas. The CO shift catalyst is prepared from one or both of molybdenum (Mo) and cobalt (Co) as an active ingredient and an oxide of one of, or a mixture or a compound of, titanium (Ti), silicon (Si), zirconium (Zr), and cerium (Ce) as a carrier for supporting the active ingredient. The CO shift catalyst can be used in a halogen-resistant CO shift reactor (15) that converts CO contained in gasified gas (12) generated in a gasifier (11) into CO2.Type: ApplicationFiled: April 10, 2009Publication date: February 2, 2012Applicant: Mitsubishi Heavy Industries, Ltd.Inventors: Toshinobu Yasutake, Tetsuya Imai, Masanao Yonemura, Susumu Okino, Keiji Fujikawa, Shinya Tachibana
-
Publication number: 20120014861Abstract: A CO2 recovery unit 10A according to a first embodiment has a CO2 absorber that removes CO2 in flue gas by bringing the flue gas containing CO2 into contact with a CO2 absorbent 12, and a regenerator 15 that diffuses CO2 in a rich solution 14 having absorbed CO2 in the CO2 absorber. The CO2 recovery unit 10A includes a first compressor 29-1 to a fourth compressor 29-4 that compress CO2 gas 16 discharged from the regenerator 15, a dehydrating column 33 that reduces moisture in the CO2 gas 16 by bringing the CO2 gas 16 into contact with a dehydrating agent 32, a combustion removal unit 41 that removes the dehydrating agent 32 mixed in the CO2 gas 16 in the dehydrating column 33, and a heat exchanger 42 that performs heat exchange between the CO2 gas 16 discharged from the third compressor 29-3 and the CO2 gas 16 discharged from the dehydrating column 33.Type: ApplicationFiled: December 21, 2009Publication date: January 19, 2012Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Takuya Hirata, Keiji Fujikawa, Tatsuya Tsujiuchi, Tsuyoshi Oishi
-
Publication number: 20110011088Abstract: Provided are high-pressure, medium-pressure, and low-pressure turbines; a boiler to generate steam for driving the turbines; a carbon dioxide recovery unit including an absorber that reduces carbon dioxide in combustion flue gas from the boiler by means of a carbon dioxide absorbent and a regenerator that regenerates an absorbent; a first auxiliary turbine that extracts steam from an inlet of the low-pressure turbine and recovers power by means of the steam thus extracted; a first steam delivery line to supply discharged steam from the first auxiliary turbine to a reboiler of the regenerator as a heat source; and a controller that controls driving of the first auxiliary turbine while keeping pressure of the discharged steam to be supplied to the reboiler within a tolerance range for the reboiler's optimum pressure corresponding to a fluctuation in an operation load of the boiler.Type: ApplicationFiled: December 18, 2009Publication date: January 20, 2011Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Masaki Iijima, Tetsuya Imai, Keiji Fujikawa, Tatsuya Tsujiuchi, Tsuyoshi Oishi, Hiroshi Tanaka
-
Publication number: 20100218674Abstract: A CO2 recovery apparatus according to a first embodiment of the present invention includes: a CO2 absorber that brings flue gas containing CO2 into contact with CO2 absorbing liquid to reduce CO2 in the flue gas; a regenerator that reduces CO2 in CO2 absorbing liquid (rich solvent) that has absorbed the CO2 in the CO2 absorber to regenerate the CO2 absorbing liquid, so that the regenerated absorbing liquid (lean solvent), having CO2 reduced in the regenerator, is reused in the CO2 absorber; a first compressor to a fourth compressor that compress the CO2 gas released from the regenerator; and an O2 reducing apparatus arranged between the second compressor and a second cooler to reduce O2 in the CO2 gas.Type: ApplicationFiled: October 27, 2009Publication date: September 2, 2010Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Keiji Fujikawa, Takuya Hirata, Tatsuya Tsujiuchi, Tsuyoshi Oishi
-
Patent number: 7387650Abstract: A fuel cell power generation system, equipped with a fuel reforming device and a fuel cell body, includes valves, pipelines, a condenser, and a pump for feeding a burner exhaust gas (raw gas) discharged from a heating burner of the fuel reforming device into the fuel reforming device, and an inert gas formation device including an oxidizable and reducible oxygen adsorbent, which is disposed in the pipelines, and adsorbs oxygen in the burner exhaust gas to remove oxygen from the burner exhaust gas and form an inert gas. The fuel cell power generation system can reliably remove residual matter, without leaving it within the fuel reforming device, in a simple manner at a low cost and with a compact configuration.Type: GrantFiled: April 25, 2003Date of Patent: June 17, 2008Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Setsuo Omoto, Naohiko Ishibashi, Keiji Fujikawa, Hirohisa Yoshida, Masami Kondo, Shigeru Nojima, Toshinobu Yasutake, Satoru Watanabe, Masanao Yonemura