Patents by Inventor Kazuhiro Domoto
Kazuhiro Domoto 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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Publication number: 20160356489Abstract: Provided is a combustion burner including: a fuel nozzle (51) that is able to blow a fuel gas obtained by mixing pulverized coal with primary air; a secondary air nozzle (52) that is able to blow secondary air from the outside of the fuel nozzle (51); a flame stabilizer (54) that is provided at a front end portion of the fuel nozzle (51) so as to be near the axis center; and a rectification member (55) that is provided between the inner wall surface of the fuel nozzle (51) and the flame stabilizer (54), wherein an appropriate flow of a fuel gas obtained by mixing solid fuel with air may be realized.Type: ApplicationFiled: August 19, 2016Publication date: December 8, 2016Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Keigo Matsumoto, Kazuhiro Domoto, Naofumi Abe, Jun Kasai
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Publication number: 20160356490Abstract: Provided is a combustion burner including: a fuel nozzle (51) that is able to blow a fuel gas obtained by mixing pulverized coal with primary air; a secondary air nozzle (52) that is able to blow secondary air from the outside of the fuel nozzle (51); a flame stabilizer (54) that is provided at a front end portion of the fuel nozzle (51) so as to be near the axis center; and a rectification member (55) that is provided between the inner wall surface of the fuel nozzle (51) and the flame stabilizer (54), wherein an appropriate flow of a fuel gas obtained by mixing solid fuel with air may be realized.Type: ApplicationFiled: August 19, 2016Publication date: December 8, 2016Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Keigo Matsumoto, Kazuhiro Domoto, Naofumi Abe, Jun Kasai
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Publication number: 20160356494Abstract: Provided is a combustion burner including: a fuel nozzle (51) that is able to blow a fuel gas obtained by mixing pulverized coal with primary air; a secondary air nozzle (52) that is able to blow secondary air from the outside of the fuel nozzle (51); a flame stabilizer (54) that is provided at a front end portion of the fuel nozzle (51) so as to be near the axis center; and a rectification member (55) that is provided between the inner wall surface of the fuel nozzle (51) and the flame stabilizer (54), wherein an appropriate flow of a fuel gas obtained by mixing solid fuel with air may be realized.Type: ApplicationFiled: August 19, 2016Publication date: December 8, 2016Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Keigo Matsumoto, Kazuhiro Domoto, Naofumi Abe, Jun Kasai
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Publication number: 20160320052Abstract: A furnace wall tube which is provided in a boiler, an interior of the furnace wall tube having a supercritical pressure and a heating medium flowing through the interior, includes: a groove portion formed on an inner circumferential surface and having a spiral shape toward a tube axis direction; and a rib portion formed to protrude inward in a radial direction by the groove portion of the spiral shape. In a cross section taken along the tube axis direction, when a width of the groove portion in the tube axis direction is defined as Wg, a height of the rib portion in the radial direction is defined as Hr and a tube outer diameter is defined as D, the width Wg of the groove portion, the height Hr of the rib portion, and the tube outer diameter D satisfy Wg/(Hr·D)>0.40.Type: ApplicationFiled: December 25, 2014Publication date: November 3, 2016Inventors: Hiroyuki NAKAHARAI, Yuichi KANEMAKI, Kazuhiro DOMOTO, Yoshinori YAMASAKI
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Publication number: 20160287060Abstract: An imaging module of the invention including a flexible wiring substrate that includes: a first end portion including a connector; a second end portion including a mount portion; a mounting portion on which an imaging device is mounted; a first bend portion bended and provided between the mounting portion and the first end portion; and a second bend portion bended and provided between the mounting portion and the second end portion. The first end portion and the second end portion overlap each other at a rear side opposite to an imaging surface of the imaging device, a cable is connected to a surface of the first end portion on the opposite side of the second end portion, and a capacitor is mounted on a surface of the second end portion on the opposite side of the first end portion.Type: ApplicationFiled: March 15, 2016Publication date: October 6, 2016Applicant: FUJIKURA LTD.Inventors: Hideaki USUDA, Kazuhiro DOMOTO, Kenichi ISHIBASHI
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Patent number: 9291343Abstract: Provided is a boiler structure that allows for appropriate flow-rate distribution for each furnace wall by using a simple configuration without any moving parts in a wide thermal-load range of a furnace from a partial load to a rated load. In a boiler structure having a furnace water-wall formed of multiple boiler evaporation tubes and configured to generate steam by heating water inside the furnace when the water that is pressure-fed to the boiler evaporation tubes flows inside the tubes, the boiler structure includes a pressure-loss adjusting section, for an internal fluid, provided in an outlet connection tube that connects outlets of water walls obtained by dividing the furnace water-wall into multiple parts.Type: GrantFiled: July 2, 2009Date of Patent: March 22, 2016Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Hiroshi Suganuma, Yuichi Kanemaki, Kazuhiro Domoto
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Publication number: 20160010853Abstract: A combustion burner 1 includes a fuel nozzle 2 that injects fuel gas prepared by mixing solid fuel and primary air, secondary air nozzles 3, 4 that inject secondary air from the outer periphery of the fuel nozzle 2, and a flame holder 5 that is arranged in an opening of the fuel nozzle 2. In the combustion burner 1, the flame holder 5 has a splitting shape that widens in the flow direction of the fuel gas. When seen in cross section along a direction in which the flame holder 5 widens, the cross section passing through the central axis of the fuel nozzle 2, a maximum distance h from the central axis of the fuel nozzle 2 to the widened end of the flame holder 5 and an inside diameter r of the opening 21 of the fuel nozzle 2 satisfy h/(r/2)<0.6.Type: ApplicationFiled: July 28, 2015Publication date: January 14, 2016Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Keigo Matsumoto, Koutaro Fujimura, Kazuhiro Domoto, Toshimitsu Ichinose, Naofumi Abe, Jun Kasai
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Patent number: 9134021Abstract: Provided is a boiler structure with which, by reducing the pressure drop in boiler evaporation tubes correspondingly to the heat flux, which varies in accordance with the distance in the boiler height direction, it is possible to reduce auxiliary power for a water feed pump and so forth, in addition to improving the flow stability and the natural circulation characteristics. The boiler structure includes a number of boiler evaporation tubes that are arranged on a wall surface of a furnace and that form a furnace wall, water pumped into the boiler evaporation tubes being heated in the furnace during flowing inside the tubes to produce steam, wherein the boiler evaporation tubes are formed by connecting tubes of a plurality of types, in which tube wall thicknesses are adjusted on the basis of furnace heat flux such that the higher the furnace heat flux in a region is, the smaller the tube inner diameter becomes.Type: GrantFiled: June 4, 2009Date of Patent: September 15, 2015Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Kazuhiro Domoto, Hiroshi Suganuma, Yuichi Kanemaki
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Patent number: 9127836Abstract: A combustion burner 1 includes a fuel nozzle 2 that injects fuel gas prepared by mixing solid fuel and primary air, secondary air nozzles 3, 4 that inject secondary air from the outer periphery of the fuel nozzle 2, and a flame holder 5 that is arranged in an opening of the fuel nozzle 2. In the combustion burner 1, the flame holder 5 has a splitting shape that widens in the flow direction of the fuel gas. When seen in cross section along a direction in which the flame holder 5 widens, the cross section passing through the central axis of the fuel nozzle 2, a maximum distance h from the central axis of the fuel nozzle 2 to the widened end of the flame holder 5 and an inside diameter r of the opening 21 of the fuel nozzle 2 satisfy h/(r/2)<0.6.Type: GrantFiled: March 11, 2010Date of Patent: September 8, 2015Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Keigo Matsumoto, Koutaro Fujimura, Kazuhiro Domoto, Toshimitsu Ichinose, Naofumi Abe, Jun Kasai
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Publication number: 20140356795Abstract: An oil-fired burner (30A) for warming, disposed adjacent to the outer periphery of a pulverized coal burner which inputs pulverized coal and air into a furnace, includes: an oil gun (32) for inputting an oil fuel disposed at the center of an outlet opening of a nozzle main body (31) substantially rectangular in cross-section; and a secondary air input port (40) disposed so as to surround the outer periphery of the oil gun (32), wherein the secondary air input port (40) is constituted of: a central arc section (41) substantially similar in shape to a circular diffuser (34) mounted on the leading end side of the oil gun (32); and rectangular sections (42L, 42R) provided continuously from both sides of the central arc section (41) and narrowed in face-to-face dimension in the direction of the adjacent pulverized coal burners so as to increase the distance from them.Type: ApplicationFiled: October 31, 2012Publication date: December 4, 2014Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Keigo Matsumoto, Kazuhiro Domoto, Naofumi Abe, Jun Kasai
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Publication number: 20140011141Abstract: Provided is a combustion burner including: a fuel nozzle (51) that is able to blow a fuel gas obtained by mixing pulverized coal with primary air; a secondary air nozzle (52) that is able to blow secondary air from the outside of the fuel nozzle (51); a flame stabilizer (54) that is provided at a front end portion of the fuel nozzle (51) so as to be near the axis center; and a rectification member (55) that is provided between the inner wall surface of the fuel nozzle (51) and the flame stabilizer (54), wherein an appropriate flow of a fuel gas obtained by mixing solid fuel with air may be realized.Type: ApplicationFiled: March 7, 2012Publication date: January 9, 2014Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Keigo Matsumoto, Kazuhiro Domoto, Naofumi Abe, Jun Kasai
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Publication number: 20120247376Abstract: A combustion burner 1 includes a fuel nozzle 2 that injects fuel gas prepared by mixing solid fuel and primary air, secondary air nozzles 3, 4 that inject secondary air from the outer periphery of the fuel nozzle 2, and a flame holder 5 that is arranged in an opening of the fuel nozzle 2. In the combustion burner 1, the flame holder 5 has a splitting shape that widens in the flow direction of the fuel gas. When seen in cross section along a direction in which the flame holder 5 widens, the cross section passing through the central axis of the fuel nozzle 2, a maximum distance h from the central axis of the fuel nozzle 2 to the widened end of the flame holder 5 and an inside diameter r of the opening 21 of the fuel nozzle 2 satisfy h/(r/2)<0.6.Type: ApplicationFiled: March 11, 2010Publication date: October 4, 2012Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Keigo Matsumoto, Koutaro Fujimura, Kazuhiro Domoto, Toshimitsu Ichinose, Naofumi Abe, Jun Kasai
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Publication number: 20120152158Abstract: A solid-fuel-fired burner that suppresses a high-temperature oxygen remaining region formed at the outer circumference of a flame and that can decrease the amount of NOx eventually produced is provided. A solid-fuel-fired burner that is used in a burner section of a solid-fuel-fired boiler for performing low-NOx combustion separately in the burner section and in an additional-air injection section and that injects powdered solid-fuel and air into a furnace includes a fuel burner having internal flame stabilization and a secondary-air injection port that does not perform flame stabilization, in which the air ratio in the fuel burner is set to 0.85 or more.Type: ApplicationFiled: June 7, 2010Publication date: June 21, 2012Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Keigo Matsumoto, Koutaro Fujimura, Kazuhiro Domoto, Toshimitsu Ichinose, Naofumi Abe, Jun Kasai
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Publication number: 20110265735Abstract: A boiler structure that allows for an appropriate flow-rate distribution of an internal fluid to multiple divided furnace wall surfaces (water-wall) without excessive pressure loss so as to reduce the pressure loss (friction loss) occurring between furnace inlet headers and outlet headers is provided. In a boiler structure having a furnace water-wall (4) formed of multiple boiler evaporation tubes (3) disposed on a wall surface of a furnace and configured to generate steam by heating water inside the furnace when the water pressure-fed to the boiler evaporation tubes (3) flows inside the tubes, the boiler structure includes orifices (22), for an internal fluid, provided in inlet connection tubes (20) that guide the water to inlet headers (21) of furnace walls obtained by dividing the furnace water-wall (4) into multiple parts, and orifices (23) provided in nozzle stubs that guide the water from the inlet headers (21) to the boiler evaporation tubes (3).Type: ApplicationFiled: July 2, 2009Publication date: November 3, 2011Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Hiroshi Suganuma, Yuichi Kanemaki, Kazuhiro Domoto
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Publication number: 20110132281Abstract: Provided is a boiler structure with which, by reducing the pressure drop in boiler evaporation tubes correspondingly to the heat flux, which varies in accordance with the distance in the boiler height direction, it is possible to reduce auxiliary power for a water feed pump and so forth, in addition to improving the flow stability and the natural circulation characteristics. The boiler structure includes a number of boiler evaporation tubes that are arranged on a wall surface of a furnace and that form a furnace wall, water pumped into the boiler evaporation tubes being heated in the furnace during flowing inside the tubes to produce steam, wherein the boiler evaporation tubes are formed by connecting tubes of a plurality of types, in which tube wall thicknesses are adjusted on the basis of furnace heat flux such that the higher the furnace heat flux in a region is, the smaller the tube inner diameter becomes.Type: ApplicationFiled: June 4, 2009Publication date: June 9, 2011Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Kazuhiro Domoto, Hiroshi Suganuma, Yuichi Kanemaki
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Publication number: 20110126781Abstract: Provided is a boiler structure that allows for appropriate flow-rate distribution for each furnace wall by using a simple configuration without any moving parts in a wide thermal-load range of a furnace from a partial load to a rated load. In a boiler structure having a furnace water-wall formed of multiple boiler evaporation tubes and configured to generate steam by heating water inside the furnace when the water that is pressure-fed to the boiler evaporation tubes flows inside the tubes, the boiler structure includes a pressure-loss adjusting section, for an internal fluid, provided in an outlet connection tube that connects outlets of water walls obtained by dividing the furnace water-wall into multiple parts.Type: ApplicationFiled: July 2, 2009Publication date: June 2, 2011Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Hiroshi Suganuma, Yuichi Kanemaki, Kazuhiro Domoto