Patents by Inventor Shintaro Honjo
Shintaro Honjo 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: 7662352Abstract: A biomass feeding unit feeds biomass to a boiler. A hydrogen-chlorine monitoring unit measures hydrogen-chloride content in flue gas fed to a desulfurization equipment. A mercury monitoring unit measures mercury content in treated flue gas emitted from the desulfurization equipment. A feed-amount instruction unit instructs proper feed amount of the biomass to the biomass feeding unit based on measurement values obtained by the hydrogen-chlorine monitoring unit and the mercury monitoring unit.Type: GrantFiled: February 23, 2006Date of Patent: February 16, 2010Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Yasuhiro Takeuchi, Yoshio Nakayama, Satoru Sugita, Susumu Okino, Shintaro Honjo
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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: 7622092Abstract: A mercury removing device includes a gasification unit that converts a non-gaseous-mercury-chlorinating agent, which is non-gaseous at room temperature and normal pressure, into gaseous-mercury-chlorinating agent by heating the non-gaseous-mercury-chlorinating agent with heat of hot air generated by using the exhaust gas or hot air generated by using an air heater installed in a flue that conveys the exhaust gas. The gaseous-mercury-chlorinating agent produced in this manner is supplied to the exhaust gas in the flue.Type: GrantFiled: May 14, 2007Date of Patent: November 24, 2009Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Shintaro Honjo, Susumu Okino, Yasuhiro Takeuchi, Seiji Kagawa, Yoshio Nakayama
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Publication number: 20090269241Abstract: The present invention provides a method for removing mercury in exhaust gas, in which mercury in exhaust gas discharged from combustion equipment is removed, characterized by including a mercury oxidation process in which mercury in the exhaust gas is converted to mercury chloride in the presence of a catalyst; a contact process in which the exhaust gas is brought into contact with an absorbing solution in a scrubber to absorb and remove mercury components from the exhaust gas; and a control process in which blowing of air or addition of an oxidizing agent into the scrubber is accomplished, and the amount of blown air or the added amount of oxidizing agent is regulated to control the oxidation-reduction potential of the absorbing agent, and a system for removing mercury in exhaust gas. According to the mercury removing method in accordance with the present invention, a phenomenon that mercury chloride is reduced into metallic mercury by SO2 etc.Type: ApplicationFiled: June 25, 2009Publication date: October 29, 2009Applicant: Mitsubishi Heavy Industries, Ltd.Inventors: Shintaro Honjo, Toru Takashina, Kozo lida, Susumu Okino, Yasuhiro Takeuchi
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Patent number: 7572420Abstract: The present invention provides a method for removing mercury in exhaust gas, in which mercury in exhaust gas discharged from combustion equipment is removed, characterized by including a mercury oxidation process in which mercury in the exhaust gas is converted to mercury chloride in the presence of a catalyst; a contact process in which the exhaust gas is brought into contact with an absorbing solution in a scrubber to absorb and remove mercury components from the exhaust gas; and a control process in which blowing of air or addition of an oxidizing agent into the scrubber is accomplished, and the amount of blown air or the added amount of oxidizing agent is regulated to control the oxidation-reduction potential of the absorbing agent, and a system for removing mercury in exhaust gas. According to the mercury removing method in accordance with the present invention, a phenomenon that mercury chloride is reduced into metallic mercury by SO2 etc.Type: GrantFiled: April 1, 2004Date of Patent: August 11, 2009Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Shintaro Honjo, Toru Takashina, Kozo Iida, Susumu Okino, Yasuhiro Takeuchi
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Publication number: 20090182650Abstract: An air pollution control system comprises: a carry-in tank truck that carries in a feedstock, i.e., concentrated hydrochloric acid (35% hydrochloric acid); a hydrogen chloride vaporizer that vaporizes the concentrated hydrochloric acid to obtain hydrogen chloride; a liquid level regulator that separates residual hydrogen chloride from extracted dilute hydrochloric acid discharged as a by-product from the hydrogen chloride vaporizer, and that regulates the liquid level of the hydrogen chloride vaporizer; a concentration regulating tank that regulates the hydrochloric acid concentration of extracted dilute hydrochloric acid 25B from which the residual hydrogen chloride has been separated to a predetermined concentration (e.g., 22%); a by-product tank that stores therein dilute hydrochloric acid regulated to have a predetermined concentration; and a carry-out tank truck that carries out the dilute hydrochloric acid with a predetermined concentration discharged from the by-product tank.Type: ApplicationFiled: January 7, 2009Publication date: July 16, 2009Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Yoshio NAKAYAMA, Susumu OKINO, Nobuyuki UKAI, Moritoshi MURAKAMI, Shintaro HONJO
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Patent number: 7544338Abstract: Provided is a system for removing mercury from a mercury-containing exhaust gas, which contains a mercury chlorinating agent feed unit for feeding a mercury chlorinating agent to an flue exhaust gas containing nitrogen oxide, sulfur oxide and mercury, a reductive denitration unit for reducing the nitrogen oxide, and a desulfurization unit for removing the sulfur oxide, characterized in that the mercury chlorinating agent feed unit further comprises a heating unit for heating a non-gaseous agent for mercury chlorination which is in the non-gaseous form under normal temperature and normal pressure or a gasifying unit for obtaining a gaseous agent for mercury chlorination from the non-gaseous agent for mercury chlorination. The present invention makes it possible to provide a mercury removal process and system which have high reliability and can be operated at a low cost.Type: GrantFiled: December 12, 2006Date of Patent: June 9, 2009Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Shintaro Honjo, Kenichi Okada, Susumu Okino, Yasuhiro Takeuchi, Satoru Sugita, Yoshio Nakayama
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Patent number: 7521032Abstract: The present invention provides a system for removing mercury in exhaust gas, in which mercury is removed from exhaust gas of a boiler, characterized in that between a denitrification apparatus and a wet type desulfurization apparatus, an NH3 decomposition catalyst and a mercury oxidation catalyst are provided, and mercury having been oxidized into mercury chloride is removed by the wet type desulfurization apparatus. Also, it provides a method for removing mercury in exhaust gas, characterized in that the mercury removing method includes an NH3 decomposition process and a mercury oxidation process, which are provided between the denitrification process and a wet desulfurization process, and mercury having been oxidized into mercury chloride is removed in the wet desulfurization process.Type: GrantFiled: January 29, 2004Date of Patent: April 21, 2009Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Shintaro Honjo, Kozo Iida, Susumu Okino, Kazuto Kobayashi, Kenichi Okada, Naoyuki Kamiyama, Shigeru Nojima, Yasuhiro Takeuchi, Tsuyoshi Ohishi
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Publication number: 20090004085Abstract: A biomass feeding unit feeds biomass to a boiler. A hydrogen-chlorine monitoring unit measures hydrogen-chloride content in flue gas fed to a desulfurization equipment. A mercury monitoring unit measures mercury content in treated flue gas emitted from the desulfurization equipment. A feed-amount instruction unit instructs proper feed amount of the biomass to the biomass feeding unit based on measurement values obtained by the hydrogen-chlorine monitoring unit and the mercury monitoring unit.Type: ApplicationFiled: February 23, 2006Publication date: January 1, 2009Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Yasuhiro Takeuchi, Yoshio Nakayama, Satoru Sugita, Susumu Okino, Shintaro Honjo
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Patent number: 7462330Abstract: A liquid column type exhaust gas treatment apparatus comprising a spray header (2) for injecting an absorbing solution upward in an absorption tower (1), wherein exhaust gas introduced from a lower part of the absorption tower (1) and the absorbing solution injected from the spray header (2) are brought into gas-liquid contact with each other, by which desulfurization of exhaust gas is accomplished, characterized in that drift preventing plates (5a and 5b) are provided in a liquid top portion of a liquid column (6) formed by the absorbing solution and/or at the installation position of the spray header (2).Type: GrantFiled: August 16, 2005Date of Patent: December 9, 2008Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Kenichi Okada, Shintaro Honjo, Susumu Okino, Toru Takashina, Masashi Yoshikawa, Tsuyoshi Oishi
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Publication number: 20080138264Abstract: A mercury removing device includes a gasification unit that converts a non-gaseous-mercury-chlorinating agent, which is non-gaseous at room temperature and normal pressure, into gaseous-mercury-chlorinating agent by heating the non-gaseous-mercury-chlorinating agent with heat of hot air generated by using the exhaust gas or hot air generated by using an air heater installed in a flue that conveys the exhaust gas. The gaseous-mercury-chlorinating agent produced in this manner is supplied to the exhaust gas in the flue.Type: ApplicationFiled: May 14, 2007Publication date: June 12, 2008Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Shintaro Honjo, Susumu Okino, Yasuhiro Takeuchi, Seiji Kagawa, Yoshio Nakayama
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Patent number: 7381389Abstract: A wet gas purification method is provided for removing ammonia from a heavy oil gasification gas, such as coal. The method principally involves a washing step during which absorbent is charged into the gas to absorb ammonia and an ammonia treating step wherein absorbent discharged from the washing step is separated into an effluent and an off-gas containing ammonia. The amount of absorbent charged during the washing step is controlled such that the ammonia concentration of gas exiting the washing step is 10 ppm or less.Type: GrantFiled: August 6, 2003Date of Patent: June 3, 2008Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Masahiro Harada, Shintaro Honjo, Makoto Susaki, Kazuo Ishida, Hajime Nagano, Susumu Okino
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Patent number: 7326286Abstract: Provided is an exhaust gas treating tower in which exhaust gas flow velocity is increased more than a prior art case so that exhaust gas treating efficiency can be enhanced or the exhaust gas treating tower can be made compact if equivalent performance is to be maintained. Also, an exhaust gas treating tower ensuring a liquid recovery is provided. In an exhaust gas treating tower 10A, liquid columns C are generated and also a liquid drop generating member 20 is provided to thereby generate liquid drops M therearound to be floated. Also, liquid is spouted from spray nozzles to thereby generate liquid films F in area different from the liquid columns C. In an exhaust gas treating tower 110, a liquid drop eliminator 120 is provided upstream of a mist eliminator 118. Interval P1 of collecting plates 121 of the liquid drop eliminator 120 is made larger than interval P2 of collecting plates 119 of the mist eliminator 118.Type: GrantFiled: April 9, 2007Date of Patent: February 5, 2008Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Kenichi Okada, Toru Takashina, Susumu Okino, Naoyuki Kamiyama, Tsumoru Nakamura, Shintaro Honjo, Kouzou Takano, Tsuyoshi Oishi
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Publication number: 20070202020Abstract: Provided is a system for removing mercury from a mercury-containing exhaust gas, which contains a mercury chlorinating agent feed unit for feeding a mercury chlorinating agent to an flue exhaust gas containing nitrogen oxide, sulfur oxide and mercury, a reductive denitration unit for reducing the nitrogen oxide, and a desulfurization unit for removing the sulfur oxide, characterized in that the mercury chlorinating agent feed unit further comprises a heating unit for heating a non-gaseous agent for mercury chlorination which is in the non-gaseous form under normal temperature and normal pressure or a gasifying unit for obtaining a gaseous agent for mercury chlorination from the non-gaseous agent for mercury chlorination. The present invention makes it possible to provide a mercury removal process and system which have high reliability and can be operated at a low cost.Type: ApplicationFiled: December 12, 2006Publication date: August 30, 2007Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Shintaro Honjo, Kenichi Okada, Susumu Okino, Yasuhiro Takeuchi, Satoru Sugita, Yoshio Nakayama
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Publication number: 20070187849Abstract: Provided is an exhaust gas treating tower in which exhaust gas flow velocity is increased more than a prior art case so that exhaust gas treating efficiency can be enhanced or the exhaust gas treating tower can be made compact if equivalent performance is to be maintained. Also, an exhaust gas treating tower ensuring a liquid recovery is provided. In an exhaust gas treating tower 10A, liquid columns C are generated and also a liquid drop generating member 20 is provided to thereby generate liquid drops M therearound to be floated. Also, liquid is spouted from spray nozzles to thereby generate liquid films F in area different from the liquid columns C. In an exhaust gas treating tower 110, a liquid drop eliminator 120 is provided upstream of a mist eliminator 118. Interval P1 of collecting plates 121 of the liquid drop eliminator 120 is made larger than interval P2 of collecting plates 119 of the mist eliminator 118.Type: ApplicationFiled: April 9, 2007Publication date: August 16, 2007Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Kenichi Okada, Toru Takashina, Susumu Okino, Naoyuki Kamiyama, Tsumoru Nakamura, Shintaro Honjo, Kouzou Takano, Tsuyoshi Oishi, Koichiro Iwashita
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Patent number: 7235220Abstract: The present invention provides an exhaust gas treatment method including oxidation treatment for converting metallic mercury contained in combustion exhaust gas into mercury chloride; and mercury removal treatment for removing mercury from the combustion exhaust gas by dissolving the mercury chloride in water, wherein a plurality of oxidation catalysts for performing the oxidation treatment are provided, and during the time when the oxidation treatment is performed, at least one of the oxidation catalysts performs catalyst performance restoration treatment without performing oxidation treatment. According to the present invention, the deterioration in mercury removal performance can be restrained even in continuous operation on condition that mercury is oxidized in a low temperature region not higher than 300° C.Type: GrantFiled: December 12, 2003Date of Patent: June 26, 2007Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Shintaro Honjo, Kozo Iida, Kenichi Okada, Yasuhiro Takeuchi, Masanori Tabata
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Publication number: 20060141414Abstract: A gas combustion treatment method for the combustion treatment of an ammonia-containing gas and a hydrogen sulfide-containing gas, the method comprising a first combustion treatment step in which the ammonia-containing gas, together with a fuel, is introduced and burned; a nitrogen oxide reduction step downstream of the first combustion treatment step, in which a portion of the hydrogen sulfide-containing gas or the ammonia-containing gas is introduced and the nitrogen oxides produced in the first combustion treatment step are reduced in a reducing atmosphere; and a second combustion treatment step downstream of the nitrogen oxide reduction step, in which the remaining hydrogen sulfide-containing gas, together with air, is introduced and burned. The present invention provides a combustion apparatus suitable for use as a combustion furnace for off-gases resulting from the wet purification of coal gasification gas.Type: ApplicationFiled: February 27, 2006Publication date: June 29, 2006Applicants: MITSUBISHI HEAVY INDUSTRIES, LTD., Ryoen Technical Service Corp.Inventors: Masahiro Harada, Makoto Susaki, Kazuo Ishida, Hajime Nagano, Masahiro Hirano, Hiroshi Suzumura, Shintaro Honjo, Yoshinori Koyama, Katsuhiko Yokohama, Mitsugi Suehiro
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Publication number: 20060110304Abstract: The present invention provides a wet gas purification method in which ammonia in the gas is removed, and a system for carrying out said method, characterized in that the method includes a washing step in which ammonia in the gas is absorbed in an absorbent for removal; and an ammonia treating step in which ammonia is stripped from the discharged absorbent at a following stage of the washing step, wherein the absorbent is divided into an off-gas containing ammonia and effluent. In the washing step makeup water is charged continuously or intermittently so that the concentration of ammonia in the gas having passed through the washing step is 10 ppm or lower. According to the present invention, a wet gas purification method can be performed in which the running costs involved in operation is reduced, the manipulation step and system are simple, operation is easy, and the reliability is high.Type: ApplicationFiled: August 6, 2003Publication date: May 25, 2006Inventors: Masahiro Harada, Shintaro Honjo, Makoto Susaki, Kazuo Ishida, Hajime Nagano, Susumu Okino
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Publication number: 20060093534Abstract: A liquid column type exhaust gas treatment apparatus comprising a spray header (2) for injecting an absorbing solution upward in an absorption tower (1), wherein exhaust gas introduced from a lower part of the absorption tower (1) and the absorbing solution injected from the spray header (2) are brought into gas-liquid contact with each other, by which desulfurization of exhaust gas is accomplished, characterized in that drift preventing plates (5a and 5b) are provided in a liquid top portion of a liquid column (6) formed by the absorbing solution and/or at the installation position of the spray header (2).Type: ApplicationFiled: August 16, 2005Publication date: May 4, 2006Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Kenichi Okada, Shintaro Honjo, Susumu Okino, Toru Takashina, Masashi Yoshikawa, Tsuyoshi Oishi
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Publication number: 20060051263Abstract: There is disclosed a COS treatment apparatus for a gasified gas, in which an O2 removal catalyst and a COS conversion catalyst located on the downstream side of a gasified gas flow with respect to the O2 removal catalyst are provided. Also, there is disclosed a COS treatment apparatus containing a TiO2 catalyst that carries Cr2O3 or NiO. Further, there is disclosed a COS treatment method including a first step in which O2 is removed by the reaction with H2S and CO, and a second step in which COS is converted to H2S.Type: ApplicationFiled: August 6, 2003Publication date: March 9, 2006Inventors: Masahiro Harada, Shintaro Honjo, Makoto Susaki, Kazuo Ishida, Hajime Nagano, Susumu Okino, Kozo Iida, Akira Johana