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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

JPH10196904A BOILER HAVING A GROUP OF WATER PIPES PLACED IN GRID PATTERN ARRANGEMENT WITHIN COMBUSTION CHAMBER 失效
公开(公告)号：JPH10196904A
公开(公告)日：1998-07-31
申请号：JP25411997
申请日：1997-09-04
申请人： HIRAKAWA GUIDOM KK
发明人： KOBAYASHI HIROSHI , UEDA YOSHIHARU , TOU KAGEYOSHI , YAMAMOTO MASAMICHI
IPC分类号： F22B37/10 , F22B21/04 , F28D7/16
摘要： PROBLEM TO BE SOLVED: To improve the flow of combustion gas, and provide a boiler with a high performance, and reduce its size, by putting the ratio of the pitch in gas flow direction of a group of water pipes to the outside diameter of the water pipe in the range of a specified value for the second and succeeding rows of the group of water pipes, and on a level of a specified value for only the first and second rows of the group of water pipes, and placing the group of water pipes in grid pattern arrangement. SOLUTION: When defined that the pitch in perpendicular direction to the flow of combustion gas of the group of water pipes 3 of a boiler is H (mm), that the pitch in the direction of gas flow of the group of water pipes 3 is L (mm), and that the outside diameter of the water pipe 3 is D (mm), the L/D of the second and succeeding rows of the group of water pipes 3 is made 1.8-2.5, and besides the L/D of only the first and second rows of the group of water pipes 3 is made approximately 3, and the group of water pipes 3 are placed in grid pattern arrangement. Hereby, in the heat absorbing pipe 5 in a combustion chamber, the combustion gas also turns into the rear flow of the water pipe, and it can be made a mixed flow with little interference of flow, and the combustion is accelerated, and also contact heat transfer performance improves. Therefore, the heat transfer performance improves in the group of contact water pipes 4, too, and the boiler can be downsized at large.

3. 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.

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