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51. 发明专利

JPH10196916A TEMPORARY COMBUSTION BURNER FOR VERTICAL FURNACE 失效
公开(公告)号：JPH10196916A
公开(公告)日：1998-07-31
申请号：JP183097
申请日：1997-01-09
申请人： NIPPON KOKAN KK
发明人： KURIOKA SHIGEO , NAKAMURA SUNAO , AKIYAMA SHUNICHI
IPC分类号： F23D14/84 , F23D14/22 , F23D14/24
摘要： PROBLEM TO BE SOLVED: To obtain a combustion burner which can heat the bottom part of a vertical furnace by utilizing an existing opening. SOLUTION: The temporary combustion burner for vertical furnace comprises an inlet side duplex tube 3 consisting of a fuel feed inner tube 1 and a combustion air supplying outer tube 2, an outlet side duplex tube 6 which has the larger effective area than that of the inlet side duplex tube 3, and a nozzle chip 12 which is disposed at a combustion part 7 at the lower part of the outlet side duplex tube 6. The outlet side duplex tube 6 has the fuel feed inner tube 1 and the combustion air supplying outer tube 2 of the inlet side duplex tube 3, a fuel feed inner tube 4 which is connected downward by changing its angle, and a combustion air supplying outer tube 5.

52. 发明专利

JPH10102139A OPERATION OF HEATING FURNACE 失效
公开(公告)号：JPH10102139A
公开(公告)日：1998-04-21
申请号：JP25946896
申请日：1996-09-30
申请人： NIPPON KOKAN KK
发明人： MISAKI HIROYUKI , AKIYAMA SHUNICHI , SHOJI KIYOSHI
IPC分类号： F23J11/02 , C21D1/74 , C21D9/00 , F23J11/12 , F27B9/40 , F27D19/00
摘要： PROBLEM TO BE SOLVED: To easily apply to the conventional heating furnace without executing a large scale modification of a facility and to effectively prevent the pressure drop of the operated heating chamber caused by stopping a part of plural heating chambers and operating the remained heating chambers. SOLUTION: In the heating furnace A composed of plural heating chambers 1-9 commonly providing a simple collecting gas duct 20 and providing a pressure control damper 11-19 to each, a part of plural heating chambers 1-9 is stopped and combustion gas is supplied to the remained operated heating chambers and materials to be heated in the operated heating chambers are heated to a prescribed temp. and the combustion exhaust gas after heating is exhausted from the operated heating chambers through the single collecting gas duct 20. In the operating method of the heating furnace, at least one of an inserting hole for the heating material and an ejecting hole for the heated material in the stopped heating chamber, is opened and at the same time, the opening degree of the pressure control damper in the stopped heating furnace is adjusted.

53. 发明专利

JPH06271948A METHOD FOR HEAT-TREATING TITANIUM ALLOY MATERIAL 失效
公开(公告)号：JPH06271948A
公开(公告)日：1994-09-27
申请号：JP5990793
申请日：1993-03-19
申请人： NIPPON KOKAN KK
发明人： HASEGAWA TOSHIYUKI , AKIYAMA SHUNICHI , SHOJI KIYOSHI
IPC分类号： C21D11/00 , C22F1/00 , C22F1/18
摘要： PURPOSE:To accurately and easily subject a titanium alloy material to heat treatment at the maximum temp. by measuring the temp. at a position in which the maximum temp. is attained in the vicinity of the titanium alloy material in a heating furnace and estimating the surface temp. of the titanium alloy material from the same measured temp. CONSTITUTION:A titanium alloy material B arranged in a heating furnace 1 is heated by a heater 11 and is subjected to heat treatment. At this time, a temp. measuring jig 2 constituted by fitting the upper face and lower face of a fire brick with thermocouples 4 and 5 is attached to the surface of the titanium alloy material B. A position in which the maximum temp. is attained in the vicinity of the titanium alloy material B is grasped, and the temp. at this position is measured at the rising temp. measuring part of the thermocouple 4 on the upper face. This measured temp. is inputted into a computer 10 via a transforming unit 6 and a displaying instrument 8, and according to this input the surface temp. of the titanium allay material B is estimated. Based on this estimated value and while the measured value of the thermocouple 5 is referred, the heater 11 is adjusted, and the heat treatment is controlled.

54. 发明专利

JPH06193862A WASTE HEAT RECOVERING METHOD IN HEATING FURNACE EMPLOYING HEAT ACCUMULATING TYPE BURNER 失效
公开(公告)号：JPH06193862A
公开(公告)日：1994-07-15
申请号：JP34257892
申请日：1992-12-22
申请人： NIPPON KOKAN KK
发明人： AKIYAMA SHUNICHI , TADA TAKESHI , IDETA TATATOMI , TERAMOTO TOYOKAZU , SATO HIROAKI
IPC分类号： F23C99/00 , F23L15/02 , F23C11/00
摘要： PURPOSE:To contrive the arbitrary setting of a furnace temperature pattern, the recovery of waste heat and low-NOx combustion by a method wherein a heat accumulating type alternately burning burner system is arranged in every plurality of zones partitioned in a unit furnace body while a waste heat boiler is arranged at the outlet port side of a heat accumulating body. CONSTITUTION:Respective unit furnaces 2a-2d are arranged in the proper number of zones in a heating furnace 1 and these furnaces are connected mutually. Respective unit furnaces 2a-2d are provided with a plurality of heat accumulating type alternately burning burners 9a, 9b respectively. On the other hand, a waste heat recovering boiler 8 is arranged at the side of exhaust gas of combustion in an exhaust gas fue to supply recovered vapor to respective heat accumulating type alternately burning burners 9a, 9b through a waste heat recovering vapor system 19. According to this method, a furnace temperature is set arbitrarily for respective unit furnaces 2a-2d while the combustion rate of the heat accumulating type alternately burning burners 9a, 9b is controlled in respective unit furnaces 2a-2d. Accordingly, the furnace temperature pattern of the whole of the heating furnace can be set arbitrarily and the temperature distribution of the insides of respective unit furnaces 2a-2d can be unified.

55. 发明专利

JPH05180579A MEASURING METHOD FOR TEMPERATURE OF REAR SURFACE OF SLAB IN HEATING FURNACE 失效
公开(公告)号：JPH05180579A
公开(公告)日：1993-07-23
申请号：JP35685291
申请日：1991-12-26
申请人： NIPPON KOKAN KK
发明人： OKAZAKI SHINJI , AKIYAMA SHUNICHI , KATO TOMOYUKI , AMINO KAZUFUMI
IPC分类号： C21D1/00 , F27D21/00 , G01J5/00 , G01J5/02
摘要： PURPOSE:To obtain a method for measuring a temperature of a rear surface of a slab by excluding influence of scale dropped and built up in a heating furnace of hot rolling. CONSTITUTION:A radiation thermometer 2a entirely surrounded by a protector 3 from an upper side is mounted on a hearth of a heating furnace 1. The thermometer 2a is so mounted with its measuring unit obliquely inclined that a temperature measuring direction becomes obliquely upward. A hole is formed at the protector 3 above a side plate, and the obliquely mounted thermometer 2a can measure a temperature through the hole. A slab 5 charged into the furnace 1 to be moved is measured at its temperature through the hole of the protector 3 by the thermometer 2a obliquely mounted at its rear surface on the hearth.

56. 发明专利

JPH04276013A METHOD FOR OPERATING BATCH TYPE HEATING FURNACE 失效
公开(公告)号：JPH04276013A
公开(公告)日：1992-10-01
申请号：JP3646791
申请日：1991-03-04
申请人： NIPPON KOKAN KK
发明人： TADA TAKESHI , AKIYAMA SHUNICHI , OZAWA TOSHINORI , TATEYAMA SATORU
IPC分类号： C21D1/76
摘要： PURPOSE:To easily and economically heat a steel material without oxidation by imperfectly burning a fuel in a first heating furnace at the specific air ratio to heat the steel material and executing after-burning to the burning gas in a second heating furnace. CONSTITUTION:Two sets of batch type heating furnaces 1, 5 connected with ducts 9 are arranged. In the first heating furnace 1, the fuel is burnt through burners 3 at 0.3-0.8 air ratio, and by this method, the steel material is heated without oxidation. The burning gas 4 incorporating unburnt part generated in the first heating furnace 1, is introduced into a second heating furnace 5 through the above-mentioned ducts 9, and at this time, the burning gas 4 is burnt at >=1.0 air ratio and burnt exhaust gas 8 after after-burning is exhausted to a chimney. By this method, the steel material 7 having no problem to the oxidation of surface is preheated, and the steel material 2 can be heated without oxidation and also the special heat recovery device and safety measures for chimney are eliminated.

57. 发明专利

JPH03170614A COMBUSTION METHOD IN HEATING FURNACE 失效
公开(公告)号：JPH03170614A
公开(公告)日：1991-07-24
申请号：JP30715889
申请日：1989-11-27
申请人： NIPPON KOKAN KK
发明人： AKIYAMA SHUNICHI , TADA TAKESHI , KUROSAWA TOSHIYUKI , SHIBUTA TSUTOMU
IPC分类号： C21D1/52 , C21D9/08
摘要： PURPOSE:To restrain the development of scale to low at any part in a heating furnace by burning unburnt content at the outside of incomplete combustion atmosphere surrounding a material to be heated and reducing secondary air quantity for burning the unburnt content at a part widening interval of burners. CONSTITUTION:In the heating furnace 1 for executing heat treatment to butt- welded pipe skelp 5 conveyed with a skid 8, fuel is burnt with the burners in primary combustion parts 3 arranged on furnace walls 2 in both sides at

58. 发明专利

JPH01162719A GAS-COOLED SKID 失效
公开(公告)号：JPH01162719A
公开(公告)日：1989-06-27
申请号：JP31759387
申请日：1987-12-17
申请人： NIPPON KOKAN KK
发明人： AKIYAMA SHUNICHI , TADA TAKESHI
IPC分类号： C21D1/00 , F23M5/00 , F23M5/08
摘要： PURPOSE:To prevent the erosion of a heat-resistant metallic protector and to prolong the service life of a gas-cooled skid even if heat insulating materials on the outermost side exfoliate by providing a spacing in which a secondary cooling gas passes to the outside of the skid body and mounting the heat resistant metallic protector thereto. CONSTITUTION:A skid button 2 for supporting a billet is welded to the air cooling type skid body 1 used in a heating furnace, etc., for the billet and a 1st heat insulating material 3 consisting of ceramic fibers or castable refractory material is wound on the outside thereof. The heat resistant metallic protector 11 is mounted via a spacer 9 to the outside thereof to provide a spacing 20 between said protector and the 1st heat insulating material 3; further, the 2nd heat insulating material 5 is wound on the outside of the protector 20. The skid cooled by passing the air for cooling in the cooling hole in the central part and the above-mentioned spacing. The heated air is used as the air for combustion to recover the sensible heat thereof. The protector 11 is cooled by the air for cooling passing the spacing 20 even in the event of the exfoliation or dislodgment of the 2nd heat insulating material and, therefore, the skid withstands long time service without being eroded.

59. 发明专利

JP2001065810A COMBUSTION METHOD OF COMBUSTION BURNER 失效
公开(公告)号：JP2001065810A
公开(公告)日：2001-03-16
申请号：JP23781499
申请日：1999-08-25
申请人： NIPPON KOKAN KK
发明人： MISAKI HIROYUKI , AKIYAMA SHUNICHI
IPC分类号： F23D14/66 , F23C99/00 , F23D14/22 , F23L15/02 , F23C11/00
摘要： PROBLEM TO BE SOLVED: To stably suppress generation of NOx by forming a recirculating flow of a combustion gas even if the load of a furnace is lowered so that a fuel feeding rate and an air feeding rate are reduced. SOLUTION: A combustion method of a combustion burner for conducting a two-stage combustion that uses a combustion burner having a combustion air supply port 2, a primary fuel supply port 3 provided inside the port 2 and a secondary fuel supply port 4 provided outside the port 2 comprises the steps of discharging fuel from the port 3 while the temperature of a furnace 1 is low and from the port 4 after the temperature of the furnace 1 has reached not less than a given temperature. In such a method, the port 4 comprises a plurality of secondary fuel supply ports 4, 5 having different diameters from each other. According to the fuel feeding rate, the ports 4, 5 having different diameters are opened and closed so that the discharging current speed of the fuel from the port 4 is rendered to be not less than a given speed that is dependent on the NOx generation rate.

60. 发明专利

JP2000130950A RADIATION HEATING APPARATUS AND CHECKING METHOD OF RADIATION HEATING APPARATUS 失效
公开(公告)号：JP2000130950A
公开(公告)日：2000-05-12
申请号：JP29983598
申请日：1998-10-21
申请人： NIPPON KOKAN KK
发明人： HAMAGUCHI SO , TSUTSUMI MICHIAKI , AKIYAMA SHUNICHI , IWASA KUNSHIYU
IPC分类号： C21D1/52 , F23L15/02 , F27B9/06
摘要： PROBLEM TO BE SOLVED: To provide a radiation heating apparatus which is difficult to be damaged and which is capable of easily checking even with any damage. SOLUTION: A radiation heating apparatus is adapted such that a fuel is burned in a box-shaped structure, and a furnace and an object in the furnace are heated with radiation from the box-shaped structure mainly heated with a flame. The box-shaped structure consists of a metal bottomed cylindrical portion 1 and a refractory cover portion 2. To the cover portion 2 there are connected a pair of heat storage combustion burners that include a heat storage structure 9 and that combust alternately. Cutoff valves 23 and 24 are provided on a fluid passage on an exhaust gas outlet side of the heat storage structure 9, and a checking gas blowing hole 16 is provided in the cover portion 2.

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