Patents by Inventor Yutaka Takeno
Yutaka Takeno 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: 9636684Abstract: Provided is a vertical pulverizing apparatus capable of suppressing abrasion of throat vanes (40) and elongating their abrasion resistant lives to thereby increase working efficiency. The vertical pulverizing apparatus is characterized in that: a throat (4) is provided between a housing (32) and a pulverizing table (2) and has an annular flow channel which is surrounded by a throat inner peripheral wall (41) and a throat outer peripheral wall (42) and which is partitioned by a large number of throat vanes (40); and a slope part (43a, 43b) extending diagonally downward from an inner peripheral wall surface of the housing (32) toward a top end of the throat outer peripheral wall (42) and a horizontal part (44) extending from a bottom end of the slope part (43b) continuously to the top end of the throat outer peripheral wall (42) are provided so that top end surfaces (40a) of the throat vanes (40) and a top surface of the horizontal part (44) can be set at the same height.Type: GrantFiled: March 25, 2013Date of Patent: May 2, 2017Assignee: Mitsubushi Hitachi Power Systems, Ltd.Inventors: Yutaka Takeno, Hiroaki Kanemoto, Teruaki Tatsuma, Hideo Mitsui, Takashi Aizawa
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Publication number: 20150321197Abstract: Provided is a vertical pulverizing apparatus capable of suppressing abrasion of throat vanes (40) and elongating their abrasion resistant lives to thereby increase working efficiency. The vertical pulverizing apparatus is characterized in that: a throat (4) is provided between a housing (32) and a pulverizing table (2) and has an annular flow channel which is surrounded by a throat inner peripheral wall (41) and a throat outer peripheral wall (42) and which is partitioned by a large number of throat vanes (40); and a slope part (43a, 43b) extending diagonally downward from an inner peripheral wall surface of the housing (32) toward a top end of the throat outer peripheral wall (42) and a horizontal part (44) extending from a bottom end of the slope part (43b) continuously to the top end of the throat outer peripheral wall (42) are provided so that top end surfaces (40a) of the throat vanes (40) and a top surface of the horizontal part (44) can be set at the same height.Type: ApplicationFiled: March 25, 2013Publication date: November 12, 2015Inventors: Yutaka TAKENO, Hiroaki KANEMOTO, Teruaki TATSUMA, Hideo MITSUI, Takashi AIZAWA
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Patent number: 8714359Abstract: [Problem] To provide a rotating classifier which can keep classification performance high and which can prevent blockages caused by biomass and the like. [Means for Resolution] The rotating classifier is characterized in that: comb teeth-like protrusion portions protruding toward a fixed member side are provided on top of rotary classification fins at intervals along the circumferential direction of the rotating classifier fins; a first gap is provided between an upper end portion of each of the comb teeth-like protrusion portions and a lower surface of the fixed member; a second gap formed between a protrusion portion and a protrusion portion adjacent to the protrusion portion is connected to the first gap; and an air stream flowing from the radial outside to the radial inside of the comb teeth-like protrusion portions through the first gap and the second gap is formed due to the rotation of the rotary classification fins.Type: GrantFiled: May 11, 2011Date of Patent: May 6, 2014Assignee: Babcock-Hitachi Kabushiki KaishaInventors: Takashi Aizawa, Akira Baba, Yuki Kondo, Yutaka Takeno, Shinichiro Nomura
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Patent number: 8651032Abstract: To provide a classification device in which product fine powder little in mixture ratio of coarse particles can be obtained. A classification device characterized in that a setting pitch P between stationary fins 13 and a width L of each stationary fin 13 are combined so that a value of P/L is in a range between 0.042×(??50)+0.64 and 0.019×(??50)+0.22 in 50°???70° when ? is an inclination angle of each stationary fin 13, P is the setting pitch, and L is the width in a direction of circulation of particles.Type: GrantFiled: September 26, 2008Date of Patent: February 18, 2014Assignee: Babcock-Hitachi Kabushiki KaishaInventors: Yoshinori Otani, Hiroaki Kanemoto, Shinichiro Nomura, Hideo Mitsui, Yutaka Takeno
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Publication number: 20130056396Abstract: [Problem] To provide a rotating classifier which can keep classification performance high and which can prevent blockages caused by biomass and the like. [Means for Resolution] The rotating classifier is characterized in that: comb teeth-like protrusion portions protruding toward a fixed member side are provided on top of rotary classification fins at intervals along the circumferential direction of the rotating classifier fins; a first gap is provided between an upper end portion of each of the comb teeth-like protrusion portions and a lower surface of the fixed member; a second gap formed between a protrusion portion and a protrusion portion adjacent to the protrusion portion is connected to the first gap; and an air stream flowing from the radial outside to the radial inside of the comb teeth-like protrusion portions through the first gap and the second gap is formed due to the rotation of the rotary classification fins.Type: ApplicationFiled: May 11, 2011Publication date: March 7, 2013Applicant: BABCOCK-HITACHI KABUSHIKI KAISHAInventors: Takashi Aizawa, Akira Baba, Yuki Kondo, Yutaka Takeno, Shinichiro Nomura
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Publication number: 20100236458Abstract: [Problem] To provide a classification device in which product fine powder little in mixture ratio of coarse particles can be obtained. [Means] for Resolution A classification device characterized in that a setting pitch P between stationary fins 13 and a width L of each stationary fin 13 are combined so that a value of P/L is in a range between 0.042×(??50)+0.64 and 0.019×(??50)+0.22 in 50°???70° when ? is an inclination angle of each stationary fin 13, P is the setting pitch, and L is the width in a direction of circulation of particles.Type: ApplicationFiled: September 26, 2008Publication date: September 23, 2010Applicant: Babock-Hitachi Kabushiki KaishaInventors: Yoshinori Otani, Hiroaki Kanemoto, Shinichiro Nomura, Hideo Mitsui, Yutaka Takeno
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Patent number: 7654396Abstract: A classifier capable of stably providing particles by further reducing the mixing ratio of coarse particles including a rotating fin (21) classifying solid particles by a centrifugal force, a cylindrical downward flow forming member (13) installed on the outer peripheral side of the rotating fin (21), a recovery cone (11) disposed under the rotating fin (21) and the downward flow forming member (13), and a housing (41). A contraction flow area (16) is formed between the housing (41) and the recovery cone (11), and a two-phase flow (52) formed of the mixture of the solid particles and gases blown up through the contraction flow area (16) is collided with the downward flow forming member (13) on the upper side of the housing (41) to form it in a downward flow. Then, that flow is led to the rotating fin side, classified into the fine particles and the coarse particles, and the fine particles are carried together with an airstream, passed through the rotating fin (21), and removed.Type: GrantFiled: May 12, 2005Date of Patent: February 2, 2010Assignee: Babcock-Hitachi Kabushiki KaishaInventors: Yutaka Takeno, Hiroaki Kanemoto, Teruaki Tatsuma, Takashi Harada, Taketoshi Tanabe
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Publication number: 20070228194Abstract: A classifier capable of stably providing particles by further reducing the mixing ratio of coarse particles, a vertical crusher having the classifier, and a coal fired boiler apparatus having the vertical crusher. The classifier comprises a rotating fin (21) classifying solid particles by a centrifugal force, a cylindrical downward flow forming member (13) installed on the outer peripheral side of the rotating fin (21), a recovery cone (11) disposed under the rotating fin (21) and the downward flow forming member (13), and a housing (41). A contraction flow area (16) is formed between the housing (41) and the recovery cone (11), and a two-phase flow (52) formed of the mixture of the solid particles and gases blown up through the contraction flow area (16) is collided with the downward flow forming member (13) on the upper side of the housing (41) to form it in a downward flow.Type: ApplicationFiled: May 12, 2005Publication date: October 4, 2007Inventors: Yutaka Takeno, Hiroaki Kanemoto, Teruaki Tatsuma, Takashi Harada, Taketoshi TAnabe
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Patent number: 6976440Abstract: A fuel supply duct, which supplies a mixed fluid of a solid fuel and carrier gas to one or more burners provided on the walls of a furnace, is provided with a branching part, and each of a plurality of branch ducts, which branch out from the branching part, is connected to a corresponding burner. Also a damper, with which the tilt angle with respect to the direction of flow of the mixed fluid can be changed, is positioned in the fuel supply duct at the upstream side of the branching part so that a mutual difference will arise in the solid fuel concentrations of the mixed fluid supplied to the respective branch ducts. A fuel distributor for fuel supply duct is thus arranged. The tilt angle of the above-mentioned damper is adjusted to increase the concentration of solid fuel in the mixed fluid supplied to a specific burner. At a burner to which the high solid fuel concentration is supplied, stability of ignition and stable combustion of the ignited flame can be obtained during low load operation.Type: GrantFiled: December 3, 2001Date of Patent: December 20, 2005Assignee: Babcock-Hitachi Kabushiki KaishaInventors: Yoshinori Ohtani, Hidehisa Yoshizako, Hiroaki Kanemoto, Yutaka Takeno, Yoshio Shimogori, Toshikazu Tsumura, Yoshitaka Takahashi
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Publication number: 20040231572Abstract: A fuel supply duct, which supplies a mixed fluid of a solid fuel and carrier gas to one or more burners provided on the walls of a furnace, is provided with a branching part, and each of a plurality of branch ducts, which branch out from the branching part, is connected to a corresponding burner. Also a damper, with which the tilt angle with respect to the direction of flow of the mixed fluid can be changed, is positioned in the fuel supply duct at the upstream side of the branching part so that a mutual difference will arise in the solid fuel concentrations of the mixed fluid supplied to the respective branch ducts. A fuel distributor for fuel supply duct is thus arranged. The tilt angle of the above-mentioned damper is adjusted to increase the concentration of solid fuel in the mixed fluid supplied to a specific burner. At a burner to which the high solid fuel concentration is supplied, stability of ignition and stable combustion of the ignited flame can be obtained during low load operation.Type: ApplicationFiled: August 22, 2003Publication date: November 25, 2004Inventors: Yoshinori Ohtani, Hidehisa Yoshizako, Hiroaki Kanemoto, Yutaka Takeno, Yoshio Shimogori, Toshikazu Tsumura, Yoshitaka Takahashi