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11. 发明专利

JPH09280543A EQUIPMENT FOR REGULATING FLOW RATE OF POWDER-GRAINS 失效
公开(公告)号：JPH09280543A
公开(公告)日：1997-10-31
申请号：JP9407596
申请日：1996-04-16
申请人： MITSUBISHI HEAVY IND LTD
发明人： YAMADA KAZUJI , OGIWARA KOTA
IPC分类号： F23K3/02
摘要： PROBLEM TO BE SOLVED: To prevent occurrence of deflection in a flow of powder-grains and to reduce the area of installation of equipment for regulating 4 flow rate of powder-grains by having a plurality of damper blades which are so provided as to surround a flow passage of the powder-grains and are opened and closed with the circular-arc faces directed toward the upstream side of the passage. SOLUTION: A damper for regulating a flow rate of pulverized coal is provided for each of a plurality of pulverized coal tubes 15 connected to one coal pulverizer 16 and it regulates the amount of supply of the pulverized coal and also prevents a deflected flow thereof. Rotating shafts 3 are provided for the pulverized coal tube 15 and they are equipped with circular-arc-shaped damper blades 2 for opening and closing a flow passage 4 of the pulverized coal which are so provided as to close uniformly from the upstream side toward the downstream side. These damper blades 2 are fitted to the rotating shafts 3 in two sets being opposed to each other outside the passage 4 so that they are directed toward the upstream side of a flow 1 of the pulverized coal and closed from the upstream side to the downstream side around the rotating shafts 3. A flow rate detector 13 is fitted to a burner 12 and, based on an output signal thereof, the opening of each damper 10 is regulated by a control device 14.

12. 发明专利

JPH09264525A FINE POWDER COAL SEPARATOR DEVICE 失效
公开(公告)号：JPH09264525A
公开(公告)日：1997-10-07
申请号：JP7386896
申请日：1996-03-28
申请人： MITSUBISHI HEAVY IND LTD
发明人： KAWASHIMA HACHIRO , OKAMOTO AKIYASU , FUJIMURA KOUTAROU , SUZUKI TAKESHI , YAMADA KAZUJI , ISODA TAKAHIRO , SHIRAHATA TAKEHIKO
IPC分类号： F23C99/00 , F23D1/00 , F23K3/02 , F23C11/00
摘要： PROBLEM TO BE SOLVED: To form a uniform flow speed distribution by a method wherein an outer diameter of a rich or lean separator at an axial center part of a fine powder coal pipe is a frustoconical shape with its flowing-in side being smaller than a flowing-out side, an outer diameter at the flowing-out part as well as a flowing-in side diameter and a flowing-out side diameter of a cut slit passing through an axial center line are made to have a rate of a specified range with the inner diameter of the fine powder coal pipe. SOLUTION: Fine powder coal mixture gas 02 is fed to a rich or lean separator 13 together with primary air. In this case, a slant angle θ of the frustoconical shape of the separator 13 is 60 deg. to 90 deg., an inner diameter of the fine powder coal pipe 05 is defined as D, a diameter d1 of a front flow side of a hollow recess slit is set to (1/10.5) D to (1/20.5) D, a diameter d2 at the rear stream side is set to (1/5.5) D to (1/10.5) D and an outer diameter d3 of the rich or lean separator 13 is set to (1/1.55) D to (1/3.5) D, thereby mixture gas at an outer side having a high fine powder coal concentration and a low fine powder coal concentration at a central part is formed in the fine powder pipe 05. With such an arrangement as above, it is possible to eliminate staying of gas caused by eddy flow which may easily be generated at a wall surface of the rear-side flow of the rich-lean separator 13 and to make a uniform flow speed distribution.

13. 发明专利

JPH09264510A FINE POWDERED COAL SEPARATOR 失效
公开(公告)号：JPH09264510A
公开(公告)日：1997-10-07
申请号：JP7638196
申请日：1996-03-29
申请人： MITSUBISHI HEAVY IND LTD
发明人： SUZUKI TAKESHI , OKAMOTO AKIYASU , FUJIMURA KOUTAROU , KAWASHIMA HACHIRO , YAMADA KAZUJI , ISODA TAKAHIRO , SHIRAHATA TAKEHIKO
IPC分类号： F23C99/00 , F23D1/00 , F23C11/00
摘要： PROBLEM TO BE SOLVED: To prevent a fine powdered coal/air flow from being disturbed owing to a movement rail for adjusting a fine powdered separator which is applied to a fine powdered coal burning boiler. SOLUTION: A fine powdered coal separator 2 is disposed between a central part of a pipe line of a burner 1 and a pipe inner wall movably axially on a bar shaped rail 3 by a guide bar 5. A kicker 4 is provided which moderates a turning flow of a fine powdered coal flow, whereby concentration of a fine powdered coal/air flow becomes thin at the center thereof and becomes dense at a periphery thereof owing to the fine powdered coal separator 2, for improvement of a firing property. The rail is the bar-shaped rail 3 in combination of bars 3a, 3b, which ensures satisfactory concentration distribution without disturbing a flow differing from the conventional plate-shaped rail.

14. 发明专利

JPH06207393A BLACK LIQUOR NOZZLE FOR RECOVERING BOILER FOR BURNING BLACK LIQUOR 失效
公开(公告)号：JPH06207393A
公开(公告)日：1994-07-26
申请号：JP405393
申请日：1993-01-13
申请人： MITSUBISHI HEAVY IND LTD
发明人： YAMADA KAZUJI
IPC分类号： D21C11/12 , F23D11/38 , F23G7/04
摘要： PURPOSE:To maintain a prescribed jetting pressure, carry out stable combustion of a black liquor without exchanging a black liquor nozzle even if the flow rate of the black liquor changes in a recovery boiler for burning the black liquor and further prevent foreign materials from biting in and clogging. CONSTITUTION:This black liquor nozzle is equipped with a flow rate regulating mechanism 2, installed in the interior of a nozzle body 1 and capable of moving in the flow direction of a black liquor and changing a flow passage area of the black liquor. Thereby, the minimal value of the flow passage area of the black liquor changed by the flow rate regulating mechanism 2 is kept at a prescribed value.

15. 发明专利

JPH0413002A METHOD FOR CONTROLLING CIRCULATING FLUIDIZED BED COMBUSTOR 失效
公开(公告)号：JPH0413002A
公开(公告)日：1992-01-17
申请号：JP11577990
申请日：1990-05-07
申请人： MITSUBISHI HEAVY IND LTD
发明人： YAMADA KAZUJI , IKUBO KUNIHIRO
IPC分类号： F23C10/28 , F23C10/02
摘要： PURPOSE:To reduce the changes of the pressure differential between the upper part and the lower part in a combustor which is due to the load on the combustor by a method wherein the amount of the particles discharged from the combustor is controlled according to said pressure differential in the combustor and the load on the combustor in such a way as to make the pressure differential larger, the lower the load on the combustor becomes. CONSTITUTION:To a control box 4 are inputted a signal 11 representing the load on the boiler, a signal representing the pressure differential in the combustor sensed by a combustor-pressure differential meter 2, and a signal from a function generator 5; the control box 4 controls a particle-discharging device 3. The control adjusts the amount of the particles in the combustor 1 according to the load on the boiler so as to bring the combustor-pressure differential to a prescribed value represented by a line C. Therefore the generation of NOx, SOx, and unburned components in the combustor can be reduced in amount, thanks to reduced changes of the combustor-pressure differential, and furthermore, with the combustor-pressure differential confined within a planned range, the safety of the combustor can be enhanced.

16. 发明专利

JPS6172990A Fluidized-bed boiler 失效
标题翻译：流化床锅炉
公开(公告)号：JPS6172990A
公开(公告)日：1986-04-15
申请号：JP19257884
申请日：1984-09-17
申请人： Mitsubishi Heavy Ind Ltd
发明人： YAMADA KAZUJI
IPC分类号： F22B1/02 , F27B15/00

17. 发明专利

JPH07318049A LIQUID FUEL BURNER 失效
公开(公告)号：JPH07318049A
公开(公告)日：1995-12-08
申请号：JP10960394
申请日：1994-05-24
申请人： MITSUBISHI HEAVY IND LTD
发明人： YAGI MICHIMASA , YAMADA KAZUJI , SAKAI TOSHIYUKI , TOKUDA KIMIYO , OGURI MASAHARU
IPC分类号： F23L3/00 , F23C99/00 , F23D11/24 , F23C11/00
摘要： PURPOSE:To prevent the deterioration of combustion at the time of small excess air or introducing the overfiring air. CONSTITUTION:The inlets of a combustion air nozzle 104 and an auxiliary air nozzle 108 are formed at a cylindrical surface in which tilting shafts 104a, 108a are axes, and a gap shielding plate 122 is provided at the vertical wall 101a of the outlets of compartments 102 and 103 thereby to reduce leakage primary air 113 and leakage secondary air 114. The nozzle 108 is vertically partitioned by a partition plate 108b, and the channel area of a remote partition from a burner gun 107 is regulated by a damper 121 thereby to throttle the air which does not considerably contribute to combustion, thereby preventing the decrease of the air flowing velocity which contributes to the combustion.

18. 发明专利

JPH11141877A IGNITER DEVICE FOR BURNING BOTH OIL AND GAS 失效
公开(公告)号：JPH11141877A
公开(公告)日：1999-05-28
申请号：JP31068897
申请日：1997-11-12
申请人： MITSUBISHI HEAVY IND LTD
发明人： NISHIMARU FUTAO , YAMADA KAZUJI
IPC分类号： F23D17/00 , F23C1/08 , F23Q3/00
摘要： PROBLEM TO BE SOLVED: To prevent the adhesion of carbon, etc., which is produced when oil is burnt to the gas nozzle of an igniter for burning both oil and gas provided with an oil nozzle and the gas nozzle. SOLUTION: In an igniter device for burning both oil and gas provided with an oil nozzle 14 and a gas nozzle 15, an air passage 7 for supplying atomizing air to the oil nozzle 14, a gas passage 10 for supplying a gas to the gas nozzle 15, and a by-pass passage 11 which connects the air passages 7 and 10 to each other are provided. When oil is ejected from the oil nozzle 14, part of the atomizing air from the air passage 7 is guided to the gas passage 10 side through the by-pass passage 10 and blown out from the gas nozzle 15.

19. 发明专利

JPH10332110A PULVERIZED COAL BURNER 失效
公开(公告)号：JPH10332110A
公开(公告)日：1998-12-15
申请号：JP14206397
申请日：1997-05-30
申请人： MITSUBISHI HEAVY IND LTD
发明人： OKAMOTO AKIYASU , TOKUDA KIMIYO , KANEKO SHOZO , YAMADA KAZUJI , OGURI MASAHARU
IPC分类号： F23D1/00
摘要： PROBLEM TO BE SOLVED: To prevent the distribution of the concentration of pulverized coal, which is set in a pulverized coal nozzle tube, from becoming abnormal, even in the case where a pulverized coal nozzle is vertically inclined in a pulverized coal burner having the pulverized coal nozzle provided in a swingable manner, in the vicinity of a top end of the pulverized coal nozzle tube for leading a mixture of the pulverized coal with transfer air to a burner. SOLUTION: This burner has a pulverized coal nozzle 104 disposed in a swingable manner by a nozzle driving shaft 118 in the vicinity of a top end of a pulverized coal nozzle tube 106. A pulverized coal concentration adjusting body 120 is mounted in the pulverized coal nozzle 104. The pulverized coal concentration adjusting body 120 is provided at its center with a coal-air mixture passage 121 and, further, a contracted flow passage 122 is formed between an outer peripheral face of the coal-air mixture passage 121 and an inner peripheral face of the pulverized coal nozzle 104. Concentration distribution is given to a coal-air mixture to be supplied from the pulverized coal nozzle 104, so that the concentration of the pulverized coal on the surface side of the coal-air mixture is made high while the concentration of the pulverized coal on the inner side of it is made low.

20. 发明专利

JPH10185110A BURNER NOZZLE 失效
公开(公告)号：JPH10185110A
公开(公告)日：1998-07-14
申请号：JP34530296
申请日：1996-12-25
申请人： MITSUBISHI HEAVY IND LTD
发明人： YAMADA KAZUJI , SUDO TAKAYUKI
IPC分类号： F23C99/00 , F23C11/00
摘要： PROBLEM TO BE SOLVED: To prevent damage of a nozzle, to improve a thermal efficiency and to reduce NOx and unburnt components by forming a gas nozzle on an outermost periphery of the nozzle and introducing combustion air and recirculating gas from another system. SOLUTION: A gas duct 6 is connected to a gas nozzle having a double structure by surrounding an outermost periphery of a nozzle 2 from four sides. Recirculating gas is guided from a system other than that for combustion air via gas ducts 11, 12, and supplied from the gas nozzle into a furnace. The combustion air 9 fed from a center of the nozzle 2 into a wind box 1 by a fan is injected into the furnace, and the recirculating gas is injected from the gas nozzle from its outer periphery. Thus, the nozzle 2 is cooled to effectively prevent damage of the nozzle 2. And, since the combustion air is used only for the combustion, excess air is reduced to improve thermal efficiency. Accordingly, NOX and unburnt components can be reduced.

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