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1. 发明专利

JPH07120171A METHOD OF OPERATING HEATING OVEN INCLUDING HEAT STORAGE ALTERNATE COMBUSTION BURNER SYSTEM 失效
公开(公告)号：JPH07120171A
公开(公告)日：1995-05-12
申请号：JP26620293
申请日：1993-10-25
申请人： NIPPON KOKAN KK , NIPPON FURNACE KOGYO KK
发明人： SATO HIROAKI , FUJII YOSHIMOTO , TANAKA RYOICHI , MATSUO MAMORU , SUDO ATSUSHI
IPC分类号： F23L15/02 , C21D1/52 , F27B9/10 , F27D7/02 , F27D19/00
摘要： PURPOSE:To prevent condensation from being produced and shorten the start-up time of an oven without deteriorating the advantage of a heat storage alternate combustion burner system. CONSTITUTION:In a heating oven 1 including a heat storage alternate combustion burner system 100 wherein a pair of burners 9 are alternately burned and heat of combustion waste gas is recovered by a heat storage structure through a non-combustion burner keeping the temperature of the gas at a high temperature for use in a preheating source of combustion air, upon the system being started when the oven is interrupted and the oven is again started, temperature rise is performed in an ordinary continuous combustion system until predetermined oven temperature is attained. All combustion waste gas produced thereupon is exhausted through a flue 8 not including a heat storage structure provided in the oven, and after the predetermined temperature is attained, the temperature rise is achieved by a heat storage alternate combustion system.

2. 发明专利

JPH11239862A METHOD FOR DRYING AND HEATING LADLE AND DEVICE THEREFOR 失效
公开(公告)号：JPH11239862A
公开(公告)日：1999-09-07
申请号：JP35757198
申请日：1998-12-16
申请人： NIPPON KOKAN KK , NIPPON FURNACE KOGYO KK
发明人： FUKUSHIMA SHINICHIRO , SUGIYAMA SHUNICHI , SATO HIROAKI , KURIHARA HIROSHI , TANAKA RYOICHI , MATSUO MAMORU , MIYATA MAKOTO
IPC分类号： F23D14/08 , B22D11/10 , B22D41/015 , F23D14/60 , F23L15/02 , F26B23/02
摘要： PROBLEM TO BE SOLVED: To shorten the drying time for lining refractory and the heating time for preheating to near the temp. of molten iron or molten steel and to reduce the cast of energy consumed. SOLUTION: The opening part of a ladle 1 is closed without almost developing gap with a cover 3 provided with at least one system of a heat-storage type burner system 4, in which the supplying of the gas for combustion and the exhausting of combustion gas are alternately executed through a heat storage body and one pair of burners 5, 6 are alternately used for combustion with the air for combustion at the high temp. near the temp. of the combustion gas. Then, the combustion gas is injected into the ladle 1 alternately from the one pair of the burners 5, 6 and also, the combustion gas is exhausted through the heat storage body of the burner during stopping of the combustion and the atmosphere in the ladle having uniform temp. distribution is formed so as to dry or heat in the ladle. The setting temp. of the ladle can be high temp. without using an oxygen-enriched burner and the heat conducting quantity is increased and the temp. rising time can be shortened and the running cost can be reduced.

3. 发明专利

JPH07119957A HEAT ACCUMULATION TYPE BURNER 失效
公开(公告)号：JPH07119957A
公开(公告)日：1995-05-12
申请号：JP26620193
申请日：1993-10-25
申请人： NIPPON KOKAN KK , NIPPON FURNACE KOGYO KK
发明人： FUJII YOSHIMOTO , SATO HIROAKI , TANAKA RYOICHI , MATSUO MAMORU , SUDO ATSUSHI
IPC分类号： F23L15/02
摘要： PURPOSE:To enable a safe and efficient removal of heat within a furnace to be carried out by a method wherein either one of or both a first burner and a second burner is provided with a gas cooler for cooling discharged gas dispersed through a heat accumulating body. CONSTITUTION:When a heating operation is to be carried out, a first burner 1a and a second burner 1b are alternatively ignited. When the burner 1a is ignited, heat is accumulated in a heat accumulating body 6b with combustion discharged gas discharged from the burner 1b under no combustion, combustion air passing through the heat accumulating body 6b is preheated when the burner 1b is ignited and then a combustion cycle and a gas discharging cycle are alternatively repeated. During cooling operation, supplying of fuel to fuel nozzles 2a and 2b is stopped, pilot burners 5a and 5b are extinguished, air is supplied form the burner 1b not provided with any gas cooler 7 so as to cool the furnace. The burner 1a having the gas cooler 7 sucks atmosphere gas within the furnace to cause the gas to be passed through the gas cooler 7 through the heat accumulating body 6b and then the atmosphere gas within the furnace is cooled to a temperature lower than a heat-resistant temperature at a facility on the downstream side of the gas cooler 7.

4. 发明专利

JPH07118729A METHOD FOR HEAT-CLEANING VACUUM DEGASSING VESSEL 失效
公开(公告)号：JPH07118729A
公开(公告)日：1995-05-09
申请号：JP28215293
申请日：1993-10-18
申请人： NIPPON KOKAN KK , NIPPON FURNACE KOGYO KK
发明人： FUKUSHIMA SHINICHIRO , SUGIYAMA SHUNICHI , SATO HIROAKI , KURIHARA HIROSHI , TANAKA RYOICHI , MATSUO MAMORU , MIYATA MAKOTO
IPC分类号： C22B9/04 , C21C7/10
摘要： PURPOSE:To enable the further sure heat-cleaning of steel slag stuck to a lining refractory in a short time. CONSTITUTION:A vacuum degassing vessel 1 is closed with a cover 3 provided with at least one or more heat storage type burner systems 4, in which one pair of burners 5, 6 are alternately burnt in a short time with the air for combustion at high temp. near the temp. of combustion gas by alternately executing the supplying of the air for combustion and the exhausting of the combustion gas through a heat storage body. A large part of combustion gas 17 produced by this alternate combustion in the vacuum degassing vessel 1 is exhausted through the heat storage body of the burner during stopping of the combustion and, on the other hand, a part of the remained combustion gas is made to be flowed to the outside of the vessel 1 from the circulating passages 2, 2 at the vessel bottom without passing through the heat storage body in the heat storage type burner system 4. As the heat of the combustion gas is utilized to the preheat of the air for combustion, even if the oxygen-enriched burner is not used, the high temp. flame combustion gas can be used. The temp. distribution of the atmosphere in the vessel is uniformized, and also, the cleaning of particularly the side wall part being ordinarily difficult to clean is easily executed to all corners of the vessel.

5. 发明专利

JPH07103435A COMBUSTION METHOD FOR REGENERATIVE RANDIANT TUBE BURNER 失效
公开(公告)号：JPH07103435A
公开(公告)日：1995-04-18
申请号：JP27738893
申请日：1993-10-12
申请人： NIPPON KOKAN KK , NIPPON FURNACE KOGYO KK
发明人： FUJII YOSHIMOTO , SATO HIROAKI , TANAKA RYOICHI , MATSUO MAMORU , SUDO ATSUSHI
IPC分类号： F23D14/12 , F23D14/66
摘要： PURPOSE:To eliminate the need for exhaust gas purge required in switching combustion of a regenerative radiant tube burner and prevent imperfect combustion. CONSTITUTION:Burners (main burner units (nozzle 4) are alternately fired and during non-conbustion time of the burners, combustion exhaust gas sensible heat which passes through their heat reservoirs 2 is accumlated on the heat reservoirs 2. In terms of a combustion side burner, the gas is burned at an air ratio of 1:1 when the combustion is started. For some time after the start of combustion, the air ratio is unchanged and the combustion is continued at the definite air ratio of 1:1. Then, after a definite time is over, the air ratio is changed to 2:1 before the combustion is changed over. After the concentration of oxygen in the combustion exhaust gas exceeds 10%, the combustion of the burners is changed over from the combustion burner side to non- combustion burner side. When starting combustion after the change over, the concentration of oxygen in the remaining combustion exhaust gas will exceed 10%, which prevents the generation of imperfect combustion even when it is used for the combustion air. This construction makes it possible to fire the burners alternately without purging when the combustion is switched.

6. 发明专利

JPH07103434A REGENERATIVE RADIANT TUBE BURNER 失效
公开(公告)号：JPH07103434A
公开(公告)日：1995-04-18
申请号：JP27738793
申请日：1993-10-12
申请人： NIPPON KOKAN KK , NIPPON FURNACE KOGYO KK
发明人： FUJII YOSHIMOTO , SATO HIROAKI , TANAKA RYOICHI , MATSUO MAMORU , SUDO ATSUSHI
IPC分类号： F23D14/12 , F23D14/66
摘要： PURPOSE:To make it possible to reduce the generation of NOx, and to reduce damages inflicted by the heat of heat reservoirs by separating combustion air to be fed by way of the heat reservoirs into a primary combustion air and a secondary combustion air by an inner cylinder of a burner main body. CONSTITUTION:Heat reservoirs 16 and burner main bodies 21 are installed in this order at the inside of a furnace where inner cylinders 22 are installed to the burner main bodies 21. Combustion air to be fed by way of the heat reservoirs 16, if separated into a primary combustion air and a secondary combustion air by means of the inner cylinders 22, an unburnt portion of the primary combustion waste gas exhausted from the outside of the inner cylinders 22, will be subjected to secondary combustion by the air flowing through the inner cylinders 22. As a result, the emission of exothermic energy of energy of energy is divided and scattered, thereby inhibiting a rise in the temperature of flames. This construction makes it possible to reduce the generation of NOx, and what is more, to relieve damages inflicted by the heat of the heat reservoirs.

7. 发明专利

JPH07112269A METHOD FOR DRYING AND HEATING LADLE 失效
公开(公告)号：JPH07112269A
公开(公告)日：1995-05-02
申请号：JP28215193
申请日：1993-10-18
申请人： NIPPON KOKAN KK , NIPPON FURNACE KOGYO KK
发明人： FUKUSHIMA SHINICHIRO , SUGIYAMA SHUNICHI , SATO HIROAKI , KURIHARA HIROSHI , TANAKA RYOICHI , MATSUO MAMORU , MIYATA MAKOTO
IPC分类号： F23D14/08 , B22D11/10 , B22D41/015 , F23D14/60 , F23L15/02 , F26B23/02 , F27D1/16 , F28D20/00
摘要： PURPOSE:To shorten the drying time of a lining refractory and the heating time for preheating to near the temp. of molten iron or molten steel and to reduce the consumed energy cost. CONSTITUTION:A ladle 1 is closed with a cover 3 providing at least one system of a heat storage type burner system 4, in which one pair of burners 5, 6 are alternately burnt in a short time with the air for combustion at high temp. near the temp. of combustion gas by alternately executing the supplying of the air for combustion and the exhausting of the combustion gas through a heat storage body, and the combustion gas is injected into the ladle alternately from the one pair of burners 5, 6. Then the combustion gas is exhausted through the heat storage body in the burner during stopping the combustion, and the atmosphere in the ladle having uniform temp. distribution is formed so as to dry or heat in the ladle. Even if the oxygen-enriched burner is not used, the preset temp. in the ladle can be made to be high, and the heat conductive quantity is increased and the temp. raising time can be shortened and also, the running cost can be reduced.

8. 发明专利

JPH06193823A HEAT STORAGE TYPE LOW-NOX BURNER 失效
公开(公告)号：JPH06193823A
公开(公告)日：1994-07-15
申请号：JP34705692
申请日：1992-12-25
申请人： NIPPON KOKAN KK , NIPPON FURNACE KOGYO KK
发明人： AKIYAMA SHUNICHI , TADA TAKESHI , ISHIOKA MUNEHIRO , SATO HIROAKI , SASAKI TAKETO , TANAKA RYOICHI , KAWAMOTO MASAO
IPC分类号： F23C99/00 , F23C11/00
摘要： PURPOSE:To enable suction of a large quantity of combustion exhaust gas in a heating furnace and thereby to enable attainment of low NOx by a method wherein the mixture of fuel and vapor is jetted from nozzles to venturi tubes of a burner part in a heat storage type burner. CONSTITUTION:A heat storage type burner 1 is constructed to be in an exhaust gas recirculation system and supply of air for combustion from an air intake 3 and exhaust of a combustion exhaust gas are conducted through a heat storage body 2. The combustion exhaust gas in a heating furnace is sucked through recirculation ducts 6 and mixed in a burner part. In this case, venturi tubes 5 are attached to the burner part and nozzles 4 jetting the mixture of fuel and vapor to the venturi tubes 5 are disposed in this part. Moreover, the combustion exhaust gas in the heating furnace is sucked and made a driving source of the venturi tubes 5. In other words, a negative pressure is brought forth in the venturi tubes 5 with jetting from the nozzles 4 and thereby the combustion exhaust gas in the heating furnace is sucked through the exhaust gas recirculation ducts 6. According to this constitution, reduction of NOx can be facilitated.

9. 发明专利

JPH07112249A METHOD FOR DRYING, HEATING AND HEAT-CLEANING TUNDISH 失效
公开(公告)号：JPH07112249A
公开(公告)日：1995-05-02
申请号：JP28215393
申请日：1993-10-18
申请人： NIPPON KOKAN KK , NIPPON FURNACE KOGYO KK
发明人： FUKUSHIMA SHINICHIRO , SUGIYAMA SHUNICHI , SATO HIROAKI , KURIHARA HIROSHI , TANAKA RYOICHI , MATSUO MAMORU , MIYATA MAKOTO
IPC分类号： B08B7/00 , B22D11/10 , B22D41/015 , F23D14/66 , F26B3/04 , F26B23/02 , F28D20/00
摘要： PURPOSE:To enable a further perfect heat-cleaning without damaging a lining refractory in a low running cost. CONSTITUTION:A tundish is closed with a cover providing at least one system of a heat storage type burner system 4, in which one pair of burners are alternately burnt in a short time with the air for combustion at high temp. near the temp. of combustion gas by alternately executing the supplying of the air for combustion and the exhausting of the combustion gas through a heat storage body. One pair of burners 5, 6 are alternately burnt in the tundish and also, the combustion gas is exhausted through the heat storage body in the burner during stopping the combustion and the atmosphere in the tundish having uniform temp. distribution is formed to heat the lining refractory. A part of the combustion gas is exhausted from a nozzle at the bottom part of the tundish. As the preheat of the air for combustion by recovering the heat of the exhaust combustion gas, the setting temp. in the tundish is made to be high, and even in the case an oxygen-enriched burner is not used, heat conductive quantity is increased and the temp. raising time can be shortened and the running cost can be reduced.

10. 发明专利

JPH06241420A HEAT STORAGE TYPE BURNER 失效
公开(公告)号：JPH06241420A
公开(公告)日：1994-08-30
申请号：JP2710193
申请日：1993-02-17
申请人： NIPPON KOKAN KK , NIPPON FURNACE KOGYO KK
发明人： ISHIGUCHI YUKIO , SATO HIROAKI , HAMAGUCHI SOU , SASAKI TAKETO , AKIYAMA SHUNICHI , HINO YOSHIMICHI , TADA TAKESHI , TANAKA RYOICHI , KAWAMOTO MASAO
IPC分类号： F23D14/66 , F23C7/06 , F23J3/04 , F23L15/02
摘要： PURPOSE:To obtain a heat storage type burner which enables operation normally for a long time by preventing a scale or the like contained in an exhaust gas from lowering the function of a heat storage body. CONSTITUTION:A heat storage chamber 4 is provided almost orthogonal to the direction of an exhaust gas flowing through a burner main pipe 2 of a burner unit 1 while having a heat storage body 5 arranged above the burner main pipe 2. A cyclone type dust trapper 3 is provided on the side of introducing the exhaust gas of the heat storage chamber 4.

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