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1. 发明专利

JPH0942602A WATER TUBE TYPE BOILER AND COMBUSTION METHOD THEREOF 失效
公开(公告)号：JPH0942602A
公开(公告)日：1997-02-14
申请号：JP21404296
申请日：1996-07-26
申请人： HIRAKAWA GUIDOM KK , KANSAI ELECTRIC POWER CO
发明人： MORIYAMA TAKASHI , SUGIOKA JUNICHI , TAWARA HIROSHI , KOBAYASHI HIROSHI , UEDA YOSHIHARU , UENASHI ATSUMI , YAMAMOTO MASAMICHI , TOU KAGEYOSHI , ISHITANI KIYOMIKI
IPC分类号： F23C99/00 , F22B31/00 , F23C11/00
摘要： PROBLEM TO BE SOLVED: To perform high load combustion while the generation of NOx is being suppressed, and to greatly reduce a boiler furnace part while the heat load of a local heat transfer surface is suppressed to a specified value by a method wherein heat water-tube insertion type combustion chambers are disposed in a plurality of stages in series and the air ratio of a burner at each stage of a plurality of stages is respectively changed. SOLUTION: A heat collection water-tube insertion type combustion chamber 5b wherein a number of heat collection water-tubes are closely disposed and inserted in a combustion reaction part 1 to effect combustion of combustion gas is provided. The heat collection water- tube insertion type combustion chambers 5b are disposed in a plurality of stages in series and the air ratio of a burner 6 in each stage of a plurality of stages is respectively changed. A heat insulation cover is arranged on the outer surface of each heat collection water-tube or a groove or a fin is formed on the inner surface of the heat collection water-tube. Further, the stages of the heat collection water-tube insertion type combustion chamber 5b are vertically or horizontally arranged. The direction of the burner 6 in each stage is arranged in a direction crossing the velocity of flow of gas of a main exhaust gas flow passage at right angles or facing the velocity of flow of the gas. The area of the main exhaust gas flow passage is regulated so that the velocity of flow of the main exhaust gas flow passage is adjusted to 1/2-1/5 of the injection speed of the burner 6 at each stage of a second stage and following.

2. 发明专利

JPH0854104A SMALL CAPACITY VERTICAL WATER TUBE BOILER WITH MAIN STEAM DISCHARGE TUBE AND THROTTLE UNIT 失效
公开(公告)号：JPH0854104A
公开(公告)日：1996-02-27
申请号：JP21209894
申请日：1994-08-11
申请人： HIRAKAWA GUIDOM KK
发明人： MIZOBUCHI IZUMI , UEDA YOSHIHARU , ISHITANI KIYOMIKI , HIRAKAWA KEIICHI
IPC分类号： F22B21/04 , F22B37/22 , F22B37/30
摘要： PURPOSE:To improve the effect of steam generation by applying throttle change upon increase or decrease of the steam pressure of a vertical water tube boiler and supplying the steam with enthalpy at the pressure. CONSTITUTION:A throttle unit 8 is assembled with the main steam discharge tube 7 of the steam collecting header 5 of a small capacity vertical water tube boiler to lower the output pressure of the header as compared with the inlet pressure of the steam to the header 5, thereby raising the dryness of saturated steam by the separation of the steam and water to regulate the throttling of the unit. A shielding plate 6 is so provided on the opposed surface of a collecting tube 4 as to collide the steam with the plate 6 provided in the header 5 by the separation of the steam and the water by first stage. Thus, the wetness of the steam in the boiler is remarkably reduced, carry over is simultaneously prevented, and the stable operation of the boiler is performed.

3. 发明专利

JPH1089605A OIL BURNING BOILER 失效
公开(公告)号：JPH1089605A
公开(公告)日：1998-04-10
申请号：JP26787296
申请日：1996-09-17
申请人： HIRAKAWA GUIDOM KK
发明人： UEDA YOSHIHARU , ISHIZUKA IKUO , KINOSHITA MASASHIGE , UENASHI ATSUMI , NAKAMURO KOJI , ISHITANI KIYOMIKI
IPC分类号： F23C99/00 , F22B21/04 , F22B31/00 , F23C11/00
摘要： PROBLEM TO BE SOLVED: To reduce the size of a combustion chamber and result in low NOx by setting a region from a burner head to a region of the combustion chamber, and providing a first water pipe group more dense than a second water pipe group streched from the foregoing region where no water pipe group is existent. SOLUTION: An interval from a burner head 4 to a region of a combustion chamber is set to be a space region L1 where no water pipe group is existent, and in a first water pipe group region L2 and a second water pipe group region L3 stretched from the foregoing region the L2 , L2 regions are selected so as to satisfy 1D

4. 发明专利

JPH085077A GAS TURBINE DEVICE HAVING AIR-COOLED TUBE NEST COMBUSTION DEVICE 失效
公开(公告)号：JPH085077A
公开(公告)日：1996-01-12
申请号：JP15794094
申请日：1994-06-15
申请人： HIRAKAWA GUIDOM KK , ISHITANI KIYOMIKI
发明人： ISHITANI KIYOMIKI
IPC分类号： F02C7/18 , F23R3/42
摘要： PURPOSE:To restrict an increasing of occurrence of NOx, provide a stable characteristic of flame and improve a power generating efficiency by a method wherein a combustion flame within a combustion chamber and/or a wall of the combustion chamber is provided with a heat transfer surface of a heat exchanger with supplied air for a combustion device other than combustion air acting as cooling fluid for use in cooling the wall. CONSTITUTION:An air-cooled heat exchanger 4 is installed within a gas turbine combustion device 1. Air supplied from a compressor 2 to the combustion device 1, is distributed into combustion air for getting a stable combustion under an appropriate air ratio in its function and other excessive air (corresponding to air cooling a wall of a prior art gas turbine or diluted air) and its ratio is about 55:45. This diluted air may act as cooling fluid for cooling the combustion flame and restricting a thermal NOx. The air of which temperature shows a high value is mixed with combustion discharged gas at a rear part of the combustion device 1, becomes a desired TIT and is fed into a turbine 3. Fine tubes with diameter of about 3mm are applied in the heat exchanger 4.

5. 发明专利

JPH1172201A COMBUSTION SPACE STRUCTURE OF BOILER IN WHICH HEAT ABSORBING WATER PIPES ARE ARRANGED IN BURNING FLAME 失效
公开(公告)号：JPH1172201A
公开(公告)日：1999-03-16
申请号：JP16203598
申请日：1998-06-10
申请人： HIRAKAWA GUIDOM KK
发明人： KOBAYASHI HIROSHI , UEDA YOSHIHARU , UENASHI ATSUMI , YAMAMOTO MASAMICHI , TOU KAGEYOSHI , ISHITANI KIYOMIKI
IPC分类号： F22B7/06 , F22B21/04
摘要： PROBLEM TO BE SOLVED: To enhance the efficiency of a boiler by providing many heat absorbing water pipes in burning flame, and by performing combustion and heat transfer actions together in the bank of the heat absorbing water pipes. SOLUTION: Many heat absorbing water pipes 2b are arranged in burning flame where the fuel in a flue 1 is burning. When the burning flame which has come out from a burner 8 passes through the heat absorbing water pipes 2b, two actions, which are a combustion promoting action and a heat transfer action, are performed together, and then exhaust gas 6 is exhausted outside through a smoke box 3. In this way, combustion and heat transfer can be completed at the same time within the volume of the combustion space, so that the drum of a boiler can be miniaturized to about half the size of a conventional one. Moreover, the burning flame is cooled down by the heat absorbing water pipes 2b, so that the restraining effect of NOx of about 50% can be achieved even by the same burner.

6. 发明专利

JP2001153302A BOILER HAVING WATER TUBE GROUP 失效
公开(公告)号：JP2001153302A
公开(公告)日：2001-06-08
申请号：JP33144099
申请日：1999-11-22
申请人： HIRAKAWA GUIDOM KK
发明人： OZAWA MAMORU , MATSUMOTO RYOSUKE , ISHITANI KIYOMIKI , UEDA YOSHIHARU , ISHIZUKA IKUO
IPC分类号： F22B21/04
摘要： PROBLEM TO BE SOLVED: To stabilize the combustion flame and the combustion gas flow which are symmetric to the axis of a burner and powerful by preventing the oscillating combustion caused by a back flow from a nozzle of the burner of a heat collection water tube insertion type combustion chamber. SOLUTION: In the heat collection water tube insertion type combustion chamber of a boiler, a restriction space if formed in contact with and in the vicinity of the nozzle of the burner irrespective of the flame ejected from the burner.

7. 发明专利

JPH0849802A COMBUSTION DEVICE FOR BOILER HAVING WATER TUBE GROUP AND COMBUSTION METHOD OF BOILER EMPLOYING THE SAME COMBUSTION DEVICE 失效
公开(公告)号：JPH0849802A
公开(公告)日：1996-02-20
申请号：JP6352293
申请日：1993-02-25
申请人： HIRAKAWA GUIDOM KK , TOKYO GAS CO LTD , OSAKA GAS CO LTD , TOHO GAS KK
发明人： KOBAYASHI HIROSHI , UEDA YOSHIHARU , KINOSHITA MASASHIGE , YAMAMOTO MASAMICHI , KARASAWA MUNEYOSHI , UENASHI ATSUMI , ISHITANI KIYOMIKI , KURIMOTO KAZUYA , HONMA MUTSUO , YASUOKA SHO , NAKAMACHI ICHIRO , HASEBE HIROYUKI , MITSUTOMI HIROYUKI , SAKAI AKIRA , OKADA HIROSHI
IPC分类号： F23C99/00 , F22B21/04 , F22B31/00 , F22B37/10 , F23C13/00 , F23D14/02 , F23M9/10 , F24H1/00 , F24H1/40 , F24H1/44 , F23C11/00
摘要： PURPOSE:To provide a burner body-type boiler, wide in combustion range and turn down, stabilized in combustion and low in the noise thereof. CONSTITUTION:A part called as a burner is eliminated and an air supplier 2 and a fuel supplier 3 are provided at the upstream side of the group of water tubes to mix air and fuel in the group of water tubes or air and oxygen are premixed in the fuel supplier 3 to burn it, further, one layer or a plurality of stages of layers of combustion layers are provided in the group of water tubes in the direction of flow of gas to premix the fuel and supply it by distributing it into single or plurality of stages of fuel supplying tubes 3, arranged at the upstream side or in the group of water tubes, or the fuel and the air are supplied into the fuel supplying tube 3 to inject the mixture to the surface of the tube individually. Further, the group of water tubes, satisfying a formula L>=3D, P>=2D, and provided with projected parts on the outer surface of the water tube or the fuel supplying tube 3, is provided. In this case, L means a distance from the fuel supplying tube 3 of respective stages to a first stage water tube 1, P means the pitch of the group of water tubes and D means the diameter of the water tube or the fuel supplying tube 3.

8. 发明专利

JPH02272207A WATER TUBE BOILER AND BURNING METHOD THEREFOR 失效
公开(公告)号：JPH02272207A
公开(公告)日：1990-11-07
申请号：JP22718188
申请日：1988-09-10
申请人： KANSAI ELECTRIC POWER CO , HIRAKAWA TEKKOSHO
发明人： SUESADA YASUHIKO , MORIYAMA TAKASHI , SUGIOKA JUNICHI , TAWARA HIROSHI , KOBAYASHI HIROSHI , UEDA YOSHIHARU , UENASHI ATSUMI , YAMAMOTO MASAMICHI , KARA KAGEYOSHI , ISHITANI KIYOMIKI
IPC分类号： F22B21/04 , F22B31/00 , F22B35/00 , F22B37/10 , F23C6/04 , F23C99/00 , F23N1/02 , F23N5/00 , F24H1/40
摘要： PURPOSE:To reduce the NOX by keeping down the flame temperature and accelerate the contact heat transmission so as to reduce the boiler burning chamber in size and weight by disposing a number of heat absorbing water tubes in a single burning chamber which is contiguous to the burner section. CONSTITUTION:A number of heat absorbing water tubes 5b are disposed in a single burning chamber 1. As for the burning method according to different fuel and air supply ratios, burning chambers having heat absorbing water tubes in it are serially connected in three stages, for example. and, in the first stage 11, the lean burning with an air excess of 1.25 air ratio is conducted to control the amount of NOX which is produced immediately, or so-called prompt NOX. In the second stage 12, the reduction ambient burning is conducted by supplying fuel only or adding a small amount of air to the fuel to allow an air ratio of less than one to reduce the NOX and, in the third stage 13, the burning is conducted with the air ratio of about 1.05 which is the final optimum air ratio. Thus, the NOX released from the boiler is reduced, and, at the same time, the size of the boiler is reduced to about 1/2 of conventional devices, allowing the boiler to be compact and light weight.

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