Patents by Inventor Takuo Shigehisa
Takuo Shigehisa 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: 8999116Abstract: An apparatus for producing a solid fuel which may be made by a method involving mixing porous coal with a mixed oil containing heavy oil and solvent oil to prepare a raw material slurry; heating the raw material slurry to promote dehydration of the porous coal while impregnating the mixed oil into pores of the porous coal to obtain a dehydrated slurry; separating the resulting upgraded porous coal and mixed oil from the dehydrated slurry; drying the separated upgraded porous coal with carrier gas, and subsequently condensing vaporized mixed oil in the carrier gas by cooling, while capturing the porous coal in the carrier gas by atomization of the condensed mixed oil, thereby recovering the mixed oil; and returning the mixed oil separated and recovered in the separating to the mixing, further involving supplying the mixed oil recovered in the final drying to the separating.Type: GrantFiled: November 7, 2011Date of Patent: April 7, 2015Assignee: Kobe Steel, Ltd.Inventors: Satoru Sugita, Tetsuya Deguchi, Takuo Shigehisa
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Patent number: 8790420Abstract: The present invention provides a method for producing a high-quality reduced metal using an upgraded coal as a carbonaceous material to be incorporated. In the method, coal is first aged by heating in an organic solvent to produce upgraded coal for metallurgy having higher thermal plasticity than that of the coal. Then, a mixture of the upgraded coal for metallurgy and a metal oxide-containing raw material is agglomerated by an agglomerator, and the resultant agglomerates are reduced by heating in a furnace and then melted by further heating to produce a reduced melt. The reduced melt is cooled and solidified in the furnace to produce a reduced solid. The reduced solid is discharged to the outside of the furnace and slag is removed using a screen to recover a metal as a reduced metal.Type: GrantFiled: July 29, 2010Date of Patent: July 29, 2014Assignee: Kobe Steel, Ltd.Inventors: Takao Harada, Hidetoshi Tanaka, Isao Kobayashi, Noriyuki Okuyama, Takuo Shigehisa
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Patent number: 8758602Abstract: A method of upgrading coal which comprises: pulverizing low-grade coal; mixing the pulverized low-grade coal with an oil to form a slurry; heating the slurry to or above the boiling point of water to vaporize the water contained in the low-grade coal and dehydrate the coal; compressing a vapor mixture of the steam resulting from the slurry heating and that part of the oil which has vaporized simultaneously and thereby elevating the temperature and pressure of the vapor mixture; and supplying the vapor mixture increased in temperature and pressure by the compression and utilizing this vapor mixture as a high-temperature heat source to heat the slurry. In the method, the vapor mixture before being compressed is brought into contact with an oil in a liquid state.Type: GrantFiled: May 11, 2009Date of Patent: June 24, 2014Assignee: Kobe Steel, Ltd.Inventors: Seiichi Yamamoto, Takuo Shigehisa, Yutaka Mitou, Shigeru Kinoshita, Yuko Sugita
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Patent number: 8734544Abstract: A solid fuel producing apparatus that even when supply of raw coal (RC) and mixed oil (MO) and supply of slurry to subsequent steps are stopped because of troubling at evaporation step or later, etc., would prevent cloggings of heat exchanger and raw coal supply means. The solid fuel producing apparatus includes a mixing tank (1) for mixing porous coal with a mixed oil having heavy oil and solvent oil contents to thereby obtain a raw slurry; an evaporator (2) for processing evaporation of water from the raw slurry by heating the same to thereby obtain a dewatered slurry; a solid-liquid separator (3) for separation of the mixed oil and upgraded porous coal from the dewatered slurry; and circulation means (4) for returning the mixed oil having been separated and recovered by the solid-liquid separator to the mixing tank. The solid fuel producing apparatus is characterized by having a mixed oil heating heat exchanger (5) for heating the mixed oil to be returned to the mixing tank by the circulation means.Type: GrantFiled: August 25, 2008Date of Patent: May 27, 2014Assignee: Kobe Steel, Ltd.Inventors: Takuo Shigehisa, Yuko Sugita
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Patent number: 8580000Abstract: The present invention provides an indirect heat-drying apparatus that is resistant to adhesion of the substance to be dried on heating pipes and gives a product having a desired and stabilized liquid content. The present invention relates to an indirect heat-drying apparatus, comprising two indirect-heating rotary dryers, i.e., the first and second indirect-heating rotary dryers that are arranged in series so that the dried substance from the first indirect-heating rotary dryer is supplied to and dried in the second indirect-heating rotary dryer as the substance to be dried; and a carrier gas-supplying means of supplying the carrier gas co-currently in the first indirect-heating rotary dryer and counter-currently in the second indirect-heating rotary dryer, with respect to the flow direction from the substance to be dried.Type: GrantFiled: August 21, 2008Date of Patent: November 12, 2013Assignees: Kobe Steel, Ltd., Tsukishima Kikai Co., Ltd.Inventors: Tetsuya Deguchi, Takuo Shigehisa, Masayasu Ito, Zenji Kato, Yuko Sugita
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Patent number: 8523961Abstract: Provided is a manufacturing method for a briquetted solid fuel that can reduce the briquetting cost while maintaining the strength of the briquetted product. A mixed oil that includes a heavy oil and a solvent oil, and a porous coal are mixed to obtain a slurry. The slurry is dewatered by heating to obtain a dewatered slurry. Solvent oil is separated from the dewatered slurry to obtain a cake, the cake is heated, and solvent oil is further separated from the cake to obtain a modified coal. Moisture is added to the modified coal to obtain a moist modified coal with a moisture content of 3 wt % to 10 wt %, and then the moist modified coal is briquetted under pressure.Type: GrantFiled: October 9, 2009Date of Patent: September 3, 2013Assignee: Kobe Steel, Ltd.Inventors: Yutaka Mitou, Seiichi Yamamoto, Takuo Shigehisa, Shigeru Kinoshita, Takahiro Shimizu, Yuko Sugita
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Publication number: 20120291342Abstract: Provided is a manufacturing method for a briquetted solid fuel that can reduce the briquetting cost while maintaining the strength of the briquetted product. A mixed oil that includes a heavy oil and a solvent oil, and a porous coal are mixed to obtain a slurry. The slurry is dewatered by heating to obtain a dewatered slurry. Solvent oil is separated from the dewatered slurry to obtain a cake, the cake is heated, and solvent oil is further separated from the cake to obtain a modified coal. Moisture is added to the modified coal to obtain a moist modified coal with a moisture content of 3 wt % to 10 wt %, and then the moist modified coal is briquetted under pressure.Type: ApplicationFiled: October 9, 2009Publication date: November 22, 2012Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd)Inventors: Satoru Sugita, Yuko Sugita, Yutaka Mitou, Seiichi Yamamoto, Takuo Shigehisa, Shigeru Kinoshita, Takahiro Shimizu
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Publication number: 20120216455Abstract: An apparatus for producing a low-pyrophoricity, transportable, storable dewatered solid fuel from a low rank coal, includes a mixing vessel 1 in which an oil containing a solvent oil is mixed with a coal to prepare a raw material slurry; evaporators 2 and 3 that evaporate moisture from the raw material slurry; a solid-liquid separator that performs solid-liquid separation on the slurry from which moisture has been evaporated; and an element that adds a heavy oil to the slurry after the completion of or in the course of evaporating moisture.Type: ApplicationFiled: May 11, 2012Publication date: August 30, 2012Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)Inventors: Satoru SUGITA, Tetsuya Deguchi, Takuo Shigehisa
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Patent number: 8252070Abstract: The present invention provides a process and an apparatus for producing a low-pyrophoricity, transportable, storable dewatered solid fuel from a low rank coal, in which the amount of heavy oil added can be reduced. A solid fuel production process includes the steps of mixing an oil containing a solvent oil with a coal to prepare a raw material slurry; evaporating moisture from the raw material slurry; subsequently performing solid-liquid separation on the slurry to yield a solid fuel; and adding a heavy oil to the slurry after the completion of or in the course of evaporating moisture.Type: GrantFiled: November 13, 2006Date of Patent: August 28, 2012Assignee: Kobe Steel, Ltd.Inventors: Satoru Sugita, Tetsuya Deguchi, Takuo Shigehisa
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Publication number: 20120079763Abstract: An apparatus for producing a solid fuel which may be made by a method involving mixing porous coal with a mixed oil containing heavy oil and solvent oil to prepare a raw material slurry; heating the raw material slurry to promote dehydration of the porous coal while impregnating the mixed oil into pores of the porous coal to obtain a dehydrated slurry; separating the resulting upgraded porous coal and mixed oil from the dehydrated slurry; drying the separated upgraded porous coal with carrier gas, and subsequently condensing vaporized mixed oil in the carrier gas by cooling, while capturing the porous coal in the carrier gas by atomization of the condensed mixed oil, thereby recovering the mixed oil; and returning the mixed oil separated and recovered in the separating to the mixing, further involving supplying the mixed oil recovered in the final drying to the separating.Type: ApplicationFiled: November 7, 2011Publication date: April 5, 2012Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Satoru SUGITA, Tetsuya Deguchi, Takuo Shigehisa
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Publication number: 20120011766Abstract: Provided are a modified solid fuel manufacturing method that reduces manufacturing costs and environmental impact while also realizing higher strength such as for transport, and modified solid fuels manufactured using the manufacturing method. When solid fuels are manufactured by crushing low grade coal, mixing the crushed low grade coal with solvent oil to prepare a slurry, heating the slurry to at least the boiling point of water to evaporate moisture included in the slurry, separating the solvent oil from the slurry to produce charcoal dust and compression compacting said charcoal dust, by heating the slurry to at least the boiling point of water, the non-volatile components included in the low grade coal are extracted with the solvent oil, the outer surface of the low grade coal and the internal surfaces of the pores are coated with the extracted non-volatile components, and the content of heavy oil added from the outside will be less than 0.Type: ApplicationFiled: September 29, 2009Publication date: January 19, 2012Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Seiichi Yamamoto, Takuo Shigehisa, Yutaka Mitou, Satoru Sugita, Yuko Sugita, Shigeru Kinoshita
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Patent number: 8075643Abstract: (Problems) Providing a method and an apparatus for producing a solid fuel, capable of suppressing increase in dust coal concentration in circulating oil.Type: GrantFiled: December 5, 2007Date of Patent: December 13, 2011Assignee: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Satoru Sugita, Tetsuya Deguchi, Takuo Shigehisa
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Publication number: 20110284671Abstract: A method of upgrading coal which comprises: pulverizing low-grade coal; mixing the pulverized low-grade coal with an oil to form a slurry; heating the slurry to or above the boiling point of water to vaporize the water contained in the low-grade coal and dehydrate the coal; compressing a vapor mixture of the steam resulting from the slurry heating and that part of the oil which has vaporized simultaneously and thereby elevating the temperature and pressure of the vapor mixture; and supplying the vapor mixture increased in temperature and pressure by the compression and utilizing this vapor mixture as a high-temperature heat source to heat the slurry. In the method, the vapor mixture before being compressed is brought into contact with an oil in a liquid state.Type: ApplicationFiled: May 11, 2009Publication date: November 24, 2011Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Seiichi Yamamoto, Takuo Shigehisa, Satoru Sugita, Yuko Sugita, Yutaka Mitou, Shigeru Kinoshita
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Publication number: 20110041393Abstract: The present invention provides an indirect heat-drying apparatus that is resistant to adhesion of the substance to be dried on heating pipes and gives a product having a desired and stabilized liquid content. The present invention relates to an indirect heat-drying apparatus, comprising two indirect-heating rotary dryers, i.e., the first and second indirect-heating rotary dryers that are arranged in series so that the dried substance from the first indirect-heating rotary dryer is supplied to and dried in the second indirect-heating rotary dryer as the substance to be dried; and a carrier gas-supplying means of supplying the carrier gas co-currently in the first indirect-heating rotary dryer and counter-currently in the second indirect-heating rotary dryer, with respect to the flow direction from the substance to be dried.Type: ApplicationFiled: August 21, 2008Publication date: February 24, 2011Applicants: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.), Tsukishima Kikai Co., Ltd.Inventors: Satoru Sugita, Yuko Sugita, Tetsuya Deguchi, Takuo Shigehisa, Masayasu Ito, Zenji Kato
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Publication number: 20110005126Abstract: A solid fuel producing apparatus that even when supply of raw coal (RC) and mixed oil (MO) and supply of slurry to subsequent steps are stopped because of troubling at evaporation step or later, etc., would prevent cloggings of heat exchanger and raw coal supply means. The solid fuel producing apparatus includes a mixing tank (1) for mixing porous coal with a mixed oil having heavy oil and solvent oil contents to thereby obtain a raw slurry; an evaporator (2) for processing evaporation of water from the raw slurry by heating the same to thereby obtain a dewatered slurry; a solid-liquid separator (3) for separation of the mixed oil and upgraded porous coal from the dewatered slurry; and circulation means (4) for returning the mixed oil having been separated and recovered by the solid-liquid separator to the mixing tank. The solid fuel producing apparatus is characterized by having a mixed oil heating heat exchanger (5) for heating the mixed oil to be returned to the mixing tank by the circulation means.Type: ApplicationFiled: August 25, 2008Publication date: January 13, 2011Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Satoru Sugita, Yuko Sugita, Takuo Shigehisa
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Publication number: 20100300247Abstract: The present invention provides a method for producing a high-quality reduced metal using an upgraded coal as a carbonaceous material to be incorporated. In the method, coal is first aged by heating in an organic solvent to produce upgraded coal for metallurgy having higher thermal plasticity than that of the coal. Then, a mixture of the upgraded coal for metallurgy and a metal oxide-containing raw material is agglomerated by an agglomerator, and the resultant agglomerates are reduced by heating in a furnace and then melted by further heating to produce a reduced melt. The reduced melt is cooled and solidified in the furnace to produce a reduced solid. The reduced solid is discharged to the outside of the furnace and slag is removed using a screen to recover a metal as a reduced metal.Type: ApplicationFiled: July 29, 2010Publication date: December 2, 2010Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Takao Harada, Hidetoshi Tanaka, Isao Kobayashi, Noriyuki Okuyama, Takuo Shigehisa
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Patent number: 7799100Abstract: The present invention provides a method for upgrading low-rank coal unsuitable for production of a reduced metal by a conventional carbon composite method to produce an upgraded coal suitable for the carbon composite method. The prevent invention also provides a method for producing a high-quality reduced metal using the upgraded coal as a carbonaceous material to be incorporated. In these methods, coal is first aged by heating in an organic solvent to produce upgraded coal for metallurgy having higher thermal plasticity than that of the coal. Then, a mixture of the upgraded coal for metallurgy and a metal oxide-containing raw material is agglomerated by an agglomerator, and the resultant agglomerates are reduced by heating in a moving hearth furnace and then melted by further heating to produce a reduced melt. The reduced melt is cooled and solidified in the moving hearth furnace to produce a reduced solid, and then the reduced solid is discharged to the outside of the furnace.Type: GrantFiled: March 5, 2004Date of Patent: September 21, 2010Assignee: Kobe Steel, Ltd.Inventors: Takao Harada, Hidetoshi Tanaka, Isao Kobayashi, Noriyuki Okuyama, Takuo Shigehisa
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Publication number: 20100077658Abstract: (Problems) Providing a method and an apparatus for producing a solid fuel, capable of suppressing increase in dust coal concentration in circulating oil.Type: ApplicationFiled: December 5, 2007Publication date: April 1, 2010Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.Inventors: Satoru Sugita, Tetsuya Deguchi, Takuo Shigehisa
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Patent number: 7628827Abstract: An apparatus for producing solid fuel includes a passage for introducing a supernatant in a mixing tank into a portion between the bottom of the mixing tank and a first slurry pump of a first slurry circulating passage using a third pump, and a passage for introducing a supernatant in an evaporator into a portion between the bottom of the evaporator and a second slurry pump of a second slurry circulating passage using a fourth pump. A method for producing a solid fuel includes introducing a supernatant in a mixing tank into a first slurry circulating passage, for washing a portion where coal deposits, and introducing a supernatant in an evaporator into a second slurry circulating passage, for washing a portion where coal deposits.Type: GrantFiled: March 18, 2005Date of Patent: December 8, 2009Assignee: Kobe Steel, Ltd.Inventors: Satoru Sugita, Tetsuya Deguchi, Takuo Shigehisa, Shinichi Katsushima
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Publication number: 20090255173Abstract: The present invention provides a process and an apparatus for producing a low-pyrophoricity, transportable, storable dewatered solid fuel from a low rank coal, in which the amount of heavy oil added can be reduced. A solid fuel production process includes the steps of mixing an oil containing a solvent oil with a coal to prepare a raw material slurry; evaporating moisture from the raw material slurry; subsequently performing solid-liquid separation on the slurry to yield a solid fuel; and adding a heavy oil to the slurry after the completion of or in the course of evaporating moisture.Type: ApplicationFiled: November 13, 2006Publication date: October 15, 2009Inventors: Satoru Sugita, Tetsuya Deguchi, Takuo Shigehisa