JP2962192B2 - Forced cooling method at the time of hot air stove ceramic burner repair - Google Patents
Forced cooling method at the time of hot air stove ceramic burner repairInfo
- Publication number
- JP2962192B2 JP2962192B2 JP15251295A JP15251295A JP2962192B2 JP 2962192 B2 JP2962192 B2 JP 2962192B2 JP 15251295 A JP15251295 A JP 15251295A JP 15251295 A JP15251295 A JP 15251295A JP 2962192 B2 JP2962192 B2 JP 2962192B2
- Authority
- JP
- Japan
- Prior art keywords
- combustion chamber
- ceramic burner
- dome
- air
- heat insulating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- Vertical, Hearth, Or Arc Furnaces (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は、高炉の熱風炉の燃焼
室下方のセラミックバーナを熱間補修するに際し、短時
間でセラミックバーナを冷却する強制冷却方法に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a forced cooling method for quickly cooling a ceramic burner below a combustion chamber of a hot blast stove in a blast furnace.
【０００２】[0002]
【従来の技術】熱風炉は、高炉へ送風する空気を加熱す
るための蓄熱式熱交換器で、図５に示すとおり、燃焼室
５１、蓄熱室５２および混冷室５３からなり、燃焼と送
風が交互に繰り返される。通常熱風炉は、高炉１基に対
して３〜４基が設置され、一般にコークス炉ガスと高炉
ガスとの混合ガスからなる燃料ガス５４と、燃焼用空気
５５を燃焼室５１下方のセラミックバーナ５６で混合し
て燃焼せしめている。燃焼室５１下部で燃焼した燃焼ガ
スは、黒矢印で示すとおり、蓄熱室５２に導入されて蓄
熱煉瓦５７と熱交換したのち、煙道５８、煙突５９を介
して大気中に放出される。このようにして蓄熱室５２の
蓄熱煉瓦５７に十分に熱を蓄えたのち、燃焼を停止し、
送風管６０から空気を蓄熱室５２に送り、蓄熱煉瓦５７
と熱交換させて高温空気となし、白矢印で示すとおり、
混冷室５３で別途供給される温度調整用空気６１と混合
されたのち、熱風本管６２を経由して高炉へ供給され
る。高炉へ供給される高温空気は、複数基の熱風炉で蓄
熱、送風を所定間隔で繰り返し行い、高炉へ連続的に供
給される。2. Description of the Related Art A hot blast stove is a regenerative heat exchanger for heating air blown to a blast furnace. As shown in FIG. 5, the hot blast stove comprises a combustion chamber 51, a heat storage chamber 52 and a mixed cooling chamber 53. Are alternately repeated. Normally, three to four blast furnaces are provided for one blast furnace, and a fuel gas 54 generally consisting of a mixed gas of coke oven gas and blast furnace gas, and a combustion air 55 are supplied to a ceramic burner 56 below the combustion chamber 51. It is mixed and burned. The combustion gas burned in the lower part of the combustion chamber 51 is introduced into the heat storage chamber 52 and exchanges heat with the heat storage brick 57 as shown by the black arrow, and then released into the atmosphere via the stack 58 and the chimney 59. After sufficient heat is stored in the heat storage brick 57 of the heat storage chamber 52 in this way, the combustion is stopped,
The air is sent from the blower tube 60 to the heat storage chamber 52, and the heat storage brick 57
Heat exchange with hot air, as indicated by the white arrow,
After being mixed with the temperature adjusting air 61 separately supplied in the mixing and cooling room 53, the mixture is supplied to the blast furnace via the hot air main pipe 62. The high-temperature air supplied to the blast furnace is continuously supplied to the blast furnace by repeatedly storing and blowing air at predetermined intervals in a plurality of hot blast furnaces.
【０００３】上記熱風炉のセラミックバーナは、図６に
示すとおり、燃料ガス供給管７１から供給された燃料ガ
ス５４と、空気供給管７２から供給された燃焼用空気５
５はセラミックバーナ５６下部では燃料側と空気側がプ
レート煉瓦７３で仕切られており、燃料ガス５４と燃焼
用空気５５は、セラミックバーナ５６上部の格子煉瓦７
４で混合されたのち、燃焼室で燃焼する構造となってい
る。このセラミックバーナ上部の格子煉瓦は、燃焼時は
４００〜５００℃、送風時は８００〜９００℃となり、
セラミックバーナで最も熱衝撃を受ける部位である。熱
風炉のセラミックバーナは、近年高炉の延命化が図られ
てきたため、長期間の使用によってセラミックバーナ上
部の格子煉瓦の脱落損傷が著しくなってきている。熱風
炉のセラミックバーナが損傷した場合は、燃焼室、蓄熱
室共に常温まで冷却してからセラミックバーナを積み替
えしていたが、完全冷却、補修、昇温が必要であり、最
低３ケ月程度の補修日数を要するという欠点を有してい
る。[0003] As shown in FIG. 6, the ceramic burner of the hot blast stove includes a fuel gas 54 supplied from a fuel gas supply pipe 71 and a combustion air 5 supplied from an air supply pipe 72.
Reference numeral 5 denotes a plate brick 73 on the fuel side and the air side below the ceramic burner 56, and the fuel gas 54 and the combustion air 55 pass through the grid brick 7 above the ceramic burner 56.
After mixing at 4, the fuel is burned in a combustion chamber. The lattice brick at the top of this ceramic burner is 400 to 500 ° C during combustion and 800 to 900 ° C during ventilation,
This is the part that receives the most thermal shock in ceramic burners. In recent years, the life of a blast furnace has been extended for a ceramic burner of a hot blast stove, and the lattice bricks on the upper portion of the ceramic burner have been greatly damaged by falling off over a long period of use. If the ceramic burner in the hot blast stove was damaged, the combustion chamber and heat storage chamber were both cooled to room temperature and then replaced with a new ceramic burner. However, complete cooling, repair, and temperature increase were required, and repairs were required for at least three months. It has the disadvantage of requiring days.
【０００４】上記の欠点を解消する方法としては、燃焼
室下部領域と燃焼室上部領域の境界に防熱板を設置して
両領域を遮断し、かつ前記燃焼室上部領域を修理後の熱
風炉の正常運転に支障を来さない程度の高温雰囲気に維
持すると共に、前記燃焼室下部領域を修理作業が実施可
能な低温雰囲気に保持しながら修理を行う方法（特開昭
５０−１０３７２５号公報）、熱風炉出口管部または炉
壁を開孔して燃焼室の水平方向に防熱板を設け、該防熱
板上部燃焼室にドーム煉瓦および蓄熱室煉瓦保護用仮燃
焼バーナを配設し、一方前記防熱板下部燃焼室を強制的
に冷却し、セラミックバーナを熱間積み替えする方法
（特開昭５２−２９４０４号公報）等が提案されてい
る。[0004] As a method of solving the above drawbacks, a heat insulating plate is installed at the boundary between the lower region of the combustion chamber and the upper region of the combustion chamber to shut off both regions, and the upper region of the combustion chamber is repaired. A method of performing repair while maintaining a high-temperature atmosphere that does not hinder normal operation and maintaining the combustion chamber lower region in a low-temperature atmosphere in which repair work can be performed (Japanese Patent Laid-Open No. 50-103725); A heat stove plate is provided in a horizontal direction of the combustion chamber by opening a hot stove outlet pipe or a furnace wall, and a dome brick and a temporary combustion burner for protecting a brick of a heat storage chamber are arranged in the combustion chamber above the heat stabilization plate. A method of forcibly cooling a lower combustion chamber of a plate and hot-reloading a ceramic burner (Japanese Patent Application Laid-Open No. 52-29404) has been proposed.
【０００５】[0005]
【発明が解決しようとする課題】上記特開昭５０−１０
３７２５号公報に開示の方法は、防熱板を設置するため
に雰囲気温度を２００℃以下まで冷却する必要があり、
しかも、防熱板の組立てを燃焼室下部で行うため危険で
あり、防熱板取付けを完了するには、燃焼停止後早くて
も５日間は必要であり、セラミックバーナの完全復旧ま
でには約５０日間要するという欠点を有している。ま
た、特開昭５２−２９４０４号公報に開示の方法は、熱
風炉の送風を休止してセラミックバーナ上部に防熱板を
設けると共に、熱風炉保熱用バーナを設置し、防熱板下
部をブロワの送風等により冷却するため、冷却に８日間
を要し、セラミックバーナの完全復旧までには３３日間
を要している。このため、熱風炉に余裕のない高炉で
は、この方法は実施不可能である。SUMMARY OF THE INVENTION The above-mentioned Japanese Patent Application Laid-Open No. Sho 50-10 is disclosed.
In the method disclosed in Japanese Patent No. 3725, it is necessary to cool the ambient temperature to 200 ° C. or less in order to install a heat insulating plate,
In addition, it is dangerous to assemble the heat shield at the lower part of the combustion chamber, and it is necessary to complete the installation of the heat shield at least five days after the combustion is stopped, and it takes about 50 days until the ceramic burner is completely restored. It has the disadvantage of costing. Further, in the method disclosed in Japanese Patent Application Laid-Open No. 52-29404, the ventilation of the hot-blast stove is stopped, a heat-insulating plate is provided above the ceramic burner, a burner for holding the hot-blast stove is installed, and the lower portion of the heat-insulating plate is provided with a blower. It takes 8 days for cooling because of cooling by blowing air, etc., and it takes 33 days for complete recovery of the ceramic burner. Therefore, this method cannot be performed in a blast furnace where there is no room for a hot blast stove.
【０００６】この発明の目的は、上記従来技術の欠点を
解消し、防熱板を境にして上部室と下部室に遮断し、防
熱板の下部室は炉壁からの輻射熱を防止して強制冷却す
ることによって、数時間（約５時間）で防熱板の下部室
を作業可能な雰囲気温度（約５０℃以下）まで冷却でき
る熱風炉セラミックバーナ補修時の強制冷却方法を提供
することにある。SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned drawbacks of the prior art and to shut off the upper chamber and the lower chamber with a heat insulating plate as a boundary. The lower chamber of the heat insulating plate prevents radiant heat from the furnace wall and is forcibly cooled. Accordingly, it is an object of the present invention to provide a forced cooling method at the time of repairing a hot-air stove ceramic burner that can cool the lower chamber of the heat insulating plate to an operable ambient temperature (about 50 ° C. or less) within several hours (about 5 hours).
【０００７】[0007]
【課題を解決するための手段】本発明者らは、上記目的
を達成すべく種々試験検討を重ねた。その結果、セラミ
ックバーナと燃焼室との境に設けられたマンホールから
燃焼室下部に断熱ドーム式防熱装置を折畳んで装入し、
内部で防熱装置を立設し、送風して断熱ドームを膨らま
せ、その通風力によってドームの円周端を燃焼室下部周
壁部に密着せしめることによって、上部燃焼室と下部燃
焼室、セラミックバーナとに遮断できること、防熱装置
設置後、断熱ドームとセラミックバーナ間の下部燃焼室
側壁にセラミックファイバーを吹付けることによって、
側壁からの輻射熱を防止できると共に、下部燃焼室炉壁
の温度降下を抑制できること、また、断熱ドームより上
方の上部燃焼室は、保熱バーナを設置して６００℃以上
に保持し、かつ燃焼ガスが断熱ドームより下方の下部燃
焼室に回らないよう煙道弁の開度を調整し、炉内圧力を
たえず負圧に保持し、一方、断熱ドームより下方の下部
燃焼室およびセラミックバーナは、セラミックバーナ下
部の燃料ガス供給管および燃焼用空気供給管から吸引フ
ァンによって吸引し、セラミックバーナと燃焼室間のマ
ンホールから大気を導入し、断熱ドームより下方の下部
燃焼室の炉内圧力は、排風ダクトのダンパーにより断熱
ドームより上方の上部燃焼室の炉内圧力と同一の負圧に
調整することによって、断熱ドームの吹き上げ、吹き下
げがなく、断熱ドーム位置を一定位置で安定させること
ができ、吸引風量の増量が可能となり、短時間で断熱ド
ームより下方の下部燃焼室およびセラミックバーナを強
制冷却できることを確認し、この発明に到達した。Means for Solving the Problems The present inventors have conducted various tests and studies to achieve the above object. As a result, from the manhole provided at the boundary between the ceramic burner and the combustion chamber, a heat insulating dome type heat insulation device was folded and inserted into the lower part of the combustion chamber,
A heat-insulation device is set up inside, and the air is blown to inflate the heat-insulating dome, and the circumferential wind of the dome is brought into close contact with the lower peripheral wall of the combustion chamber by the passing wind, so that the upper combustion chamber, the lower combustion chamber, and the ceramic burner are separated. After the installation of the heat insulation device, by spraying ceramic fibers on the lower combustion chamber side wall between the insulating dome and the ceramic burner,
In addition to being able to prevent radiant heat from the side walls, it is possible to suppress the temperature drop of the furnace wall of the lower combustion chamber, and to maintain the temperature of the upper combustion chamber above the heat insulating dome at 600 ° C. or higher by installing a heat retention burner. The opening of the flue valve is adjusted so that it does not turn to the lower combustion chamber below the insulated dome, and the furnace pressure is constantly maintained at a negative pressure, while the lower combustion chamber and ceramic burner below the insulated dome are made of ceramic. The air is sucked from the fuel gas supply pipe and the combustion air supply pipe at the lower part of the burner by a suction fan, the atmosphere is introduced from the manhole between the ceramic burner and the combustion chamber, and the pressure in the lower combustion chamber below the adiabatic dome is reduced by the exhaust air. By adjusting the negative pressure of the upper combustion chamber above the insulating dome to the same negative pressure by the damper of the duct, there is no blow-up or blow-down of the heat-insulating dome. It is possible to stabilize the zoom position at a certain position, it is possible to increase the amount of suction air, to confirm that a short time can be forcibly cooled to a lower combustion chamber and ceramic burner below the insulation dome, reaching to the present invention.
【０００８】すなわちこの発明は、高炉熱風炉のセラミ
ックバーナを熱間補修するに際し、耐火繊維クロスを縫
製した空気送風により膨らむ折畳み式の断熱ドームを、
セラミックバーナと燃焼室との境に設けられたマンホー
ルから搬入して燃焼室下部に水平に取付け、上部燃焼室
と下部燃焼室およびセラミックバーナとに遮断し、断熱
ドームより上方の上部燃焼室は補助加熱バーナで６００
℃以上に保持し、断熱ドームより下方の下部燃焼室は側
壁にセラミックファイバーを吹付けると共に、セラミッ
クバーナ下部から吸引ブロワで吸引し、断熱ドームを搬
入したマンホールから外気を吸い込ませ、かつ断熱ドー
ムより上方の上部燃焼室と下方の下部燃焼室共に炉内圧
力を同一負圧で保持することを特徴とする熱風炉セラミ
ックバーナ補修時の強制冷却方法である。That is, according to the present invention, when a ceramic burner of a blast furnace hot stove is hot-repaired, a foldable insulated dome which is inflated by air blasting a fire-resistant fiber cloth is provided.
Carry in from the manhole provided at the boundary between the ceramic burner and the combustion chamber, mount it horizontally below the combustion chamber, shut off the upper combustion chamber, the lower combustion chamber and the ceramic burner, and supplement the upper combustion chamber above the insulating dome 600 with heating burner
℃ or more, and the lower combustion chamber below the insulating dome sprays ceramic fibers on the side walls, sucks it from the lower part of the ceramic burner with a suction blower, draws in the outside air from the manhole where the insulating dome is brought in, and A forced cooling method for repairing a ceramic burner in a hot blast stove characterized by maintaining the furnace pressure at the same negative pressure in both an upper upper combustion chamber and a lower lower combustion chamber.
【０００９】[0009]
【作用】この発明においては、耐火繊維クロスを縫製し
た空気送風により膨らむ折畳み式の断熱ドームを、セラ
ミックバーナと燃焼室との境に設けられたマンホールか
ら搬入して燃焼室下部に水平に取付け、上部燃焼室と下
部燃焼室およびセラミックバーナとに遮断し、断熱ドー
ムより上方の上部燃焼室は補助加熱バーナで６００℃以
上に保持することによって、上部燃焼室の珪石煉瓦で形
成された炉壁の急冷却、急昇熱による損傷を防止すると
共に、炉内圧力を負圧に保持することによって、熱風が
断熱ドームより下方の下部燃焼室への漏れ込みを防止す
ることができる。また、断熱ドームより下方の下部燃焼
室は、側壁にセラミックファイバーを吹付けることによ
って、炉壁からの輻射熱が防止でき、セラミックバーナ
の冷却をより効果的に行うことができると共に、断熱ド
ームより下方の下部燃焼室炉壁温度の降下が抑制される
ため、断熱ドームより上方の上部燃焼室珪石煉瓦から断
熱ドームより下方の下部燃焼室炉壁煉瓦への熱移動を低
減でき、上部燃焼室珪石煉瓦の温度降下が抑制できる。
さらに、断熱ドームより下方の下部燃焼室を断熱ドーム
より上方の上部燃焼室と同一の負圧に保持するため、セ
ラミックバーナ下部の燃料ガス供給管、燃焼用空気供給
管から別途設置した吸引ブロワで吸引し、断熱ドームを
搬入したマンホールから外気を吸い込ませることによっ
て強制冷却する。冷却速度を早める場合は、断熱ドーム
より上方の上部燃焼室の炉内圧力を断熱ドームより下方
の下部燃焼室の目標炉内圧力に予め調整しておき、断熱
ドームより下方の下部燃焼室およびセラミックバーナの
吸引風量を増量することによって、調整することができ
る。According to the present invention, a foldable insulated dome which is swelled by air blowing and sewn a refractory fiber cloth is carried in from a manhole provided at a boundary between a ceramic burner and a combustion chamber, and is horizontally attached to a lower portion of the combustion chamber. The upper combustion chamber is closed to the upper combustion chamber, the lower combustion chamber, and the ceramic burner, and the upper combustion chamber above the heat insulating dome is maintained at 600 ° C. or higher by an auxiliary heating burner. By preventing damage due to rapid cooling and rapid heating, and maintaining the furnace pressure at a negative pressure, it is possible to prevent hot air from leaking into the lower combustion chamber below the heat insulating dome. In addition, the lower combustion chamber below the heat insulating dome can prevent radiant heat from the furnace wall by spraying the ceramic fibers on the side wall, and can more effectively cool the ceramic burner, and can cool the ceramic burner below the heat insulating dome. Lowering the furnace wall temperature of the lower combustion chamber, the heat transfer from the upper combustion chamber silica brick above the insulating dome to the lower combustion chamber furnace wall below the insulating dome can be reduced, and the upper combustion chamber silica brick can be reduced. Temperature drop can be suppressed.
Furthermore, in order to keep the lower combustion chamber below the heat insulating dome at the same negative pressure as the upper combustion chamber above the heat insulating dome, a suction blower separately installed from the fuel gas supply pipe below the ceramic burner and the combustion air supply pipe is used. The air is sucked, and forced cooling is performed by sucking outside air from the manhole into which the heat-insulated dome is carried. If the cooling rate is to be increased, the furnace pressure in the upper combustion chamber above the insulating dome is adjusted in advance to the target furnace pressure in the lower combustion chamber below the insulating dome, and the lower combustion chamber below the insulating dome and ceramic. It can be adjusted by increasing the suction air volume of the burner.
【００１０】この発明で使用する防熱装置は、耐火繊維
クロスを縫製した空気送風により膨らむ折畳み式の断熱
ドームと、該断熱ドームを支持する開閉自在の支持梁
と、該支持梁を移動、昇降させる支持機構と、断熱ドー
ムに接続した圧縮空気供給管とで構成され、高炉熱風炉
のセラミックバーナ補修に際し、断熱ドームは、炉外で
は閉止した支持梁上で小さく折畳んでおき、支持機構
は、マンホールから搬入できるよう最下限まで下げた状
態としておく。そして、セラミックバーナと燃焼室との
境に設けられたマンホールを開放し、防熱装置を炉内に
装入したのち、支持機構を炉外より操作して支持梁を所
定位置に位置決めし、支持梁を開く。支持梁を開いたの
ち、断熱ドームに接続した圧縮空気供給管から圧縮空気
を供給し、断熱ドームを膨らませて断熱ドームの円周端
を燃焼室周壁面に密着せしめ、防熱装置の取付けが完了
する。この防熱装置の取付けによって、上部燃焼室と下
部燃焼室およびセラミックバーナとは完全に遮断され
る。[0010] A heat insulation device used in the present invention is a foldable heat insulating dome which is swelled by air blown with a refractory fiber cloth, a support beam which supports the heat insulation dome, and which can be opened and closed, and moves and raises and lowers the support beam. It consists of a support mechanism and a compressed air supply pipe connected to the heat insulating dome.When repairing the ceramic burner of the blast furnace hot stove, the heat insulating dome is folded small on a closed support beam outside the furnace, and the support mechanism is It is lowered to the lower limit so that it can be carried in from the manhole. Then, after opening the manhole provided at the boundary between the ceramic burner and the combustion chamber, inserting the heat insulating device into the furnace, operating the support mechanism from outside the furnace to position the support beam at a predetermined position, open. After the support beam is opened, compressed air is supplied from the compressed air supply pipe connected to the heat insulating dome, the heat insulating dome is expanded, and the circumferential end of the heat insulating dome is brought into close contact with the peripheral wall of the combustion chamber, and the installation of the heat insulating device is completed. . By installing the heat insulating device, the upper combustion chamber, the lower combustion chamber, and the ceramic burner are completely shut off.
【００１１】この発明の防熱装置の折畳み式の断熱ドー
ムは、中央部の支持梁のみに固定してあり、断熱ドーム
の外周部のドーナツリング部の内面には、シリコンゴム
を塗布している。断熱ドームを膨らませる際には、先ず
外周部のドーナツリング部に送風し、その空気圧で断熱
ドームを開いて断熱ドームのドーナツリング部を燃焼室
周壁面に密着させ、しかるのち断熱ドームの内面部に送
風し、内面部を膨らませ、断熱効果を上げる構造として
いる。断熱ドームを形成する耐火繊維クロスは、通気す
るが漏れ量以上の送風量と、断熱ドーム重量以上の送風
圧力があれば膨らむ。また、断熱ドームの外周部のドー
ナツリング部内面のシリコンゴムは、約２００℃で劣化
するが短時間（１５分）では消失せず、圧力を要する断
熱ドームが開くまで気密を保持でき、それ以降の洩風量
は増加するが、その分以上に送風量を確保することによ
って、断熱ドームの開いた状態を維持することができ
る。支持梁を移動、昇降させる支持機構の上昇は、スク
リューネジで行い、支持梁は旋回して開く構造となって
いる。支持梁は、中心部を要として片側づつ１８０°開
いて３６０°開くもので、ワイヤーを反対側マンホール
より引っ張って開くようになっている。断熱ドームを構
成する耐火繊維クロスとしては、シリカクロス、セラミ
ックファイバークロス、炭素繊維クロス、アルミナファ
イバークロス等を用いることができる。The foldable heat insulating dome of the heat insulating device according to the present invention is fixed only to the center support beam, and silicon rubber is applied to the inner surface of the donut ring at the outer peripheral portion of the heat insulating dome. When inflating the heat insulating dome, first blow air to the donut ring on the outer periphery, open the heat insulating dome with the air pressure, and bring the donut ring of the heat insulating dome into close contact with the peripheral wall of the combustion chamber, and then the inner surface of the heat insulating dome The air is blown to the inner surface and the inner surface is expanded to increase the heat insulation effect. The refractory fiber cloth forming the heat insulating dome is inflated if it is ventilated but has an air flow rate greater than the amount of leakage and a blowing pressure greater than the weight of the heat insulating dome. In addition, the silicon rubber on the inner surface of the donut ring at the outer periphery of the heat insulating dome deteriorates at about 200 ° C., but does not disappear in a short time (15 minutes), and can maintain airtightness until the heat insulating dome requiring pressure opens. Although the amount of air leakage increases, the open state of the heat insulating dome can be maintained by securing the amount of air blowing more than that. The support mechanism for moving and raising and lowering the support beam is raised with a screw screw, and the support beam is turned and opened. The support beam is opened at 180 ° and 360 ° at each side, centering on the center portion, and pulls the wire from the manhole on the opposite side to open. As the refractory fiber cloth constituting the heat insulating dome, silica cloth, ceramic fiber cloth, carbon fiber cloth, alumina fiber cloth, or the like can be used.
【００１２】[0012]
実施例１ 以下にこの発明の詳細を実施の一例を示す図１ないし図
３に基づいて説明する。図１はこの発明方法を実施して
いる状態を示す概略斜視図、図２はこの発明方法で使用
する断熱装置の搬入前の斜視図、図３はこの発明方法実
施時の燃焼室、セラミックバーナの一部切り欠き斜視図
である。図１ないし図３において、１は燃焼室、２は燃
焼室１下方のセラミックバーナ、３はセラミックバーナ
２への燃料ガス供給管、４はセラミックバーナ２への燃
焼用空気供給管で、燃料ガス供給管３および燃焼用空気
供給管４から供給された燃料ガスと燃焼用空気は、セラ
ミックバーナ２上部の格子煉瓦部で混合されて燃焼室１
内で燃焼し、図示しない蓄熱室に供給される。Embodiment 1 Hereinafter, details of the present invention will be described with reference to FIGS. 1 to 3 showing an embodiment. FIG. 1 is a schematic perspective view showing a state in which the method of the present invention is carried out, FIG. 2 is a perspective view of a heat insulating device used in the method of the present invention before loading, and FIG. 3 is a combustion chamber and a ceramic burner when the method of the present invention is carried out. It is a partially cutaway perspective view of FIG. 1 to 3, 1 is a combustion chamber, 2 is a ceramic burner below the combustion chamber 1, 3 is a fuel gas supply pipe to the ceramic burner 2, and 4 is a combustion air supply pipe to the ceramic burner 2. The fuel gas and the combustion air supplied from the supply pipe 3 and the combustion air supply pipe 4 are mixed in the lattice brick portion above the ceramic burner 2 to form the combustion chamber 1.
And is supplied to a heat storage chamber (not shown).
【００１３】５は燃焼室１とセラミックバーナ２との境
に設けられているマンホールで、通常は閉塞されてい
る。１１は折畳み式の断熱ドームで、半円で製作し繋ぎ
合わせたものである。断熱ドーム１１は、上面クロス１
２、下面クロス共にシリカクロスを使用し、外周部のド
ーナツリング部１３の内面には、シリコンゴムをコーテ
ィングしたものである。断熱ドーム１１の縫製は、断熱
繊維からなる糸を使用し、上面クロス１２にはセラミッ
クファイバークロスを縫い付け、縫合わせ部には、セラ
ミックテープを貼り付けて断熱効果を向上させている。
断熱ドーム１１の空気の導入部は、内面部空気導入口と
ドーナツリング部１３への空気導入口とに分割され、別
々に送風する構造となっている。１４は断熱ドーム１１
を支持する開閉自在の支持梁、１５は支持梁１４を移
動、昇降させる支持機構で、本体フレーム１６の上に取
付けた一対のスクリューネジ１７に螺合するナット１８
に一端を枢着した支柱１９の先端に枢着した受台２０上
に固定した内輪に４段に外輪２１を嵌合し、最上段の外
輪と２段目と３段目の外輪に各支持梁１４の基端が溶接
固定され、最上段の外輪は固定とし、２段目と３段目の
外輪２１は回転自在で、かつ水平の溝が対応する位置に
設けられ、該溝に内輪に固定したストッパーピンが係合
し、外輪２１の回転を規制しており、外輪２１を回転さ
せることによって、支持梁１４が旋回して３６０°に開
くよう構成されている。Reference numeral 5 denotes a manhole provided at the boundary between the combustion chamber 1 and the ceramic burner 2, which is normally closed. Numeral 11 denotes a foldable heat insulating dome which is manufactured and connected in a semicircle. The heat insulating dome 11 is a top cloth 1
2. A silica cloth is used for the lower surface cloth, and the inner surface of the donut ring portion 13 on the outer peripheral portion is coated with silicon rubber. The heat insulating dome 11 is sewn using a thread made of heat insulating fibers, a ceramic fiber cloth is sewn on the upper cloth 12, and a ceramic tape is stuck on the seam to improve the heat insulating effect.
The air inlet of the heat insulating dome 11 is divided into an air inlet for the inner surface and an air inlet for the donut ring 13, and has a structure in which air is blown separately. 14 is an insulating dome 11
A support mechanism 15 for moving and lifting the support beam 14, and a nut 18 screwed to a pair of screw screws 17 mounted on the main body frame 16.
The outer ring 21 is fitted in four steps to the inner ring fixed on a support 20 pivotally attached to the tip of a column 19 having one end pivotally connected to the outer ring at the top, the second and third outer rings. The base end of the beam 14 is welded and fixed, the uppermost outer ring is fixed, the second and third outer rings 21 are rotatable, and horizontal grooves are provided at corresponding positions. The fixed stopper pin is engaged to regulate the rotation of the outer ring 21, and by rotating the outer ring 21, the support beam 14 is turned and opened to 360 °.
【００１４】２２は断熱ドーム１１の上部室に配設した
１対の補助燃焼バーナで、炉内温度を炉壁珪石煉瓦の急
冷却、急昇温による損傷の生じない６００℃以上の温度
に保持すると共に、上部燃焼室の炉内圧力を図示しない
燃焼排ガス調整弁の開度を調整して所定の負圧に保持す
る。２３は燃料ガス供給管３の開閉弁、２４は燃焼用空
気供給管４の開閉弁、２５は開閉弁２３とセラミックバ
ーナ２間の燃料ガス供給管３に連結した排気管、２６は
開閉弁２４とセラミックバーナ２間の燃焼用空気供給管
４に連結した排気管で、各排気管２５、２６は合流して
流量調整弁２７を介して吸引ブロワ２８に連結され、燃
焼炉１下方のセラミックバーナ２を補修時、吸引ブロワ
２８を駆動して流量調整弁２７を開けば、セラミックバ
ーナ２内の空気が吸引され、セラミックバーナ２直上の
マンホール５から外気がセラミックバーナ２内に導入さ
れるよう構成されている。Reference numeral 22 denotes a pair of auxiliary combustion burners disposed in the upper chamber of the heat insulating dome 11. The furnace temperature is maintained at a temperature of 600 ° C. or more which does not cause damage due to rapid cooling of the furnace wall silica brick and rapid temperature rise. At the same time, the furnace pressure in the upper combustion chamber is maintained at a predetermined negative pressure by adjusting the opening of a combustion exhaust gas control valve (not shown). 23 is an on-off valve for the fuel gas supply pipe 3, 24 is an on-off valve for the combustion air supply pipe 4, 25 is an exhaust pipe connected to the fuel gas supply pipe 3 between the on-off valve 23 and the ceramic burner 2, and 26 is an on-off valve 24. The exhaust pipes 25 and 26 are connected to a suction blower 28 via a flow control valve 27, and connected to a suction blower 28 via a flow control valve 27. When the blower 28 is driven to open the flow control valve 27 during repair, air in the ceramic burner 2 is sucked, and outside air is introduced into the ceramic burner 2 from the manhole 5 immediately above the ceramic burner 2. Have been.
【００１５】上記のとおり構成したことによって、燃焼
炉１下方のセラミックバーナ２を補修する場合は、燃料
ガス供給管３および燃焼用空気供給管４の開閉弁２３、
２４を閉止して燃焼を停止せしめたのち、セラミックバ
ーナ２直上のマンホール５を開放し、防熱装置を片側マ
ンホール５の手前の作業デッキ２９上に搬送し、対面マ
ンホール５に防熱装置の本体フレーム１６を搬入する。
しかるのち、図示しないワイヤーを反対側のマンホール
５から引張って２段目と３段目の外輪２１を回転させて
支持梁１４を３６０°に開いたのち、本体フレーム１６
の上に取付けた一対のスクリューネジ１７を回転させて
支柱１９の先端に枢着した受台２０を上昇させる。次い
で空気導入口に接続したエアーホースから空気を供給し
て断熱ドーム１１外周のドーナツリング部１３に送風し
て膨らませたのち、内面部空気導入口に接続したエアー
ホースから空気を供給して断熱ドーム１１の内面部を膨
らませ、ドーナツリング部１３を燃焼室１の周壁面に密
着させて断熱性を向上させ、防熱装置の取付けを完了す
る。断熱ドーム１１内の空気圧は、圧力調整弁により常
時一定圧に保持する。これによって断熱ドーム１１より
上方の上部燃焼室と下方の下部燃焼室およびセラミック
バーナ２とは、完全に遮断される。When the ceramic burner 2 below the combustion furnace 1 is repaired by the above configuration, the on-off valves 23 of the fuel gas supply pipe 3 and the combustion air supply pipe 4 are used.
24, the combustion is stopped, the manhole 5 immediately above the ceramic burner 2 is opened, and the heat insulating device is transported onto the work deck 29 in front of the one-side manhole 5, and the main body frame 16 of the heat insulating device is placed in the facing manhole 5. Carry in.
Thereafter, a wire (not shown) is pulled from the manhole 5 on the opposite side to rotate the outer ring 21 of the second and third stages to open the support beam 14 to 360 °.
By rotating a pair of screw screws 17 mounted on the support 19, the pedestal 20 pivotally attached to the tip of the column 19 is raised. Then, air is supplied from an air hose connected to the air inlet, and blown to the donut ring portion 13 on the outer periphery of the heat insulating dome 11 to expand the air. Then, air is supplied from the air hose connected to the air inlet of the inner surface to supply heat. The inner surface portion of the combustion chamber 11 is inflated, and the donut ring portion 13 is brought into close contact with the peripheral wall surface of the combustion chamber 1 to improve heat insulation and complete the installation of the heat insulation device. The air pressure in the heat insulating dome 11 is always maintained at a constant pressure by a pressure regulating valve. Thereby, the upper combustion chamber above the heat insulating dome 11, the lower combustion chamber below and the ceramic burner 2 are completely shut off.
【００１６】しかるのち、燃焼室１の断熱ドーム１１よ
り上方の上部燃焼室の補助燃焼バーナ２２に点火して燃
焼させ、燃焼室１の断熱ドーム１１より上方の上部燃焼
室の炉内温度を珪石煉瓦の急冷却、急昇熱による損傷の
発生しない温度に保持すると共に、燃焼排ガス調整弁の
開度を調整して断熱ドーム１１より上方の上部燃焼室の
炉内圧力を所定の負圧、例えば−１．５〜−２．０ｍｍ
Ａｑに保持する。また、燃焼室１の断熱ドーム１１より
下方の下部燃焼室の内面には、セラミックファイバーを
厚さ２０〜３０ｍｍで吹付けると共に、セラミックバー
ナ２下部の燃料ガス供給管３および燃焼用空気供給管４
に接続した吸引ブロワ２８で排気することによって、断
熱ドーム１１を搬入したマンホール５から外気を吸入し
て強制冷却する。断熱ドーム１１より下方の下部燃焼室
の炉内圧力は、断熱ドーム１１より上方の上部燃焼室と
同じく負圧、例えば−１．５〜−２．０ｍｍＡｑとなる
ように排風量を調整する。Thereafter, the auxiliary combustion burner 22 of the upper combustion chamber above the heat insulating dome 11 of the combustion chamber 1 is ignited and burned, and the temperature in the furnace of the upper combustion chamber above the heat insulating dome 11 of the combustion chamber 1 is changed to silica quartz. While maintaining the temperature at which no damage is caused by rapid cooling and rapid heating of the brick, the opening degree of the combustion exhaust gas regulating valve is adjusted to reduce the furnace pressure in the upper combustion chamber above the insulating dome 11 to a predetermined negative pressure, for example, -1.5 to -2.0 mm
Hold at Aq. A ceramic fiber is sprayed to a thickness of 20 to 30 mm on the inner surface of the lower combustion chamber below the heat insulating dome 11 of the combustion chamber 1, and a fuel gas supply pipe 3 and a combustion air supply pipe 4 below the ceramic burner 2.
The outside air is sucked from the manhole 5 into which the heat-insulating dome 11 has been carried in by exhausting air by the suction blower 28 connected to the air-conditioning apparatus, and forcedly cooled. The amount of exhaust air is adjusted so that the pressure in the furnace of the lower combustion chamber below the heat insulating dome 11 is the same as the negative pressure of the upper combustion chamber above the heat insulating dome 11, for example, -1.5 to -2.0 mmAq.
【００１７】上記による断熱ドーム１１より下方の下部
燃焼室およびセラミックバーナの強制冷却によって、セ
ラミックバーナ２内温度が５０℃以下まで冷却される
と、マンホール５からセラミックバーナ２の煉瓦積替え
補修を行う。セラミックバーナ部２の補修を完了すれ
ば、圧力調整弁を閉じてエアーホースを取外して断熱ド
ーム１１から空気を抜き、本体フレーム１６の上に取付
けた一対のスクリューネジ１７を前記と逆回転させて支
柱１９の先端に枢着した受台２０を下降させ、２段目と
３段目の外輪２１を前記と逆回転させて支持梁１４と共
に断熱ドーム１１を閉じる。次いでマンホール５から防
熱装置の本体フレーム１６を搬出し、マンホール５を閉
じて防熱装置の取り外しを完了する。When the temperature inside the ceramic burner 2 is cooled down to 50 ° C. or lower by the forced cooling of the lower combustion chamber below the heat insulating dome 11 and the ceramic burner as described above, the brick reloading repair of the ceramic burner 2 from the manhole 5 is performed. When the repair of the ceramic burner section 2 is completed, the pressure regulating valve is closed, the air hose is removed, air is removed from the heat insulating dome 11, and a pair of screw screws 17 mounted on the main body frame 16 are rotated in the reverse direction. The pedestal 20 pivotally attached to the tip of the column 19 is lowered, and the second and third outer rings 21 are rotated in the reverse direction to close the heat insulating dome 11 together with the support beams 14. Next, the main body frame 16 of the heat insulating device is carried out from the manhole 5, the manhole 5 is closed, and the removal of the heat insulating device is completed.
【００１８】なお、上記マンホール５は、通常内側が耐
火物で断熱された状態となっており、開放状態のマンホ
ール５から防熱装置を装入し、炉補修が完了すれば防熱
装置を搬出し、補修した耐火物を乾燥する。その後、マ
ンホール５を密閉し、セラミックバーナ２下部の燃料ガ
ス供給管３および燃焼用空気供給管４に接続した排気管
２５、２６を取外し、開閉弁燃料ガス供給管３および燃
焼用空気供給管４の開閉弁２３、２４を開放してセラミ
ックバーナ２に供給し、通常の操業状態に復帰するので
ある。The inside of the manhole 5 is normally insulated with a refractory, and a heat insulating device is inserted from the open manhole 5, and when the furnace repair is completed, the heat insulating device is taken out. Dry the repaired refractory. Thereafter, the manhole 5 is closed, and the exhaust pipes 25 and 26 connected to the fuel gas supply pipe 3 and the combustion air supply pipe 4 below the ceramic burner 2 are removed, and the on-off valve fuel gas supply pipe 3 and the combustion air supply pipe 4 are removed. Are opened and supplied to the ceramic burner 2 to return to a normal operation state.
【００１９】実施例２ セラミックバーナ２への燃料供給を停止したのち、図示
しない煙突側でドラフト圧を調整しながら、セラミック
バーナ２の直上のマンホール５を開放した。その時点で
の燃焼室１内温度は、１０００℃であった。開放したマ
ンホール５から実施例１の断熱ドーム１１を装入して設
置が完了まで１時間を要した。セラミックバーナ２への
燃料供給停止から２時間後に断熱ドーム１１より上方の
上部燃焼室の２本の８００×１０3ｋｃａｌ／Ｈｒの補
助燃焼バーナに点火し、断熱ドーム１１より上方の上部
燃焼室の炉内温度を６５０℃以上、燃焼排ガス流量調整
弁の開度を調整して断熱ドーム１１より上方の上部燃焼
室の炉内圧力を−１．５〜−２．０ｍｍＡｑの負圧に保
持した。Example 2 After the fuel supply to the ceramic burner 2 was stopped, the manhole 5 immediately above the ceramic burner 2 was opened while adjusting the draft pressure on the chimney side (not shown). The temperature in the combustion chamber 1 at that time was 1000 ° C. It took one hour to insert the heat-insulating dome 11 of Example 1 from the opened manhole 5 and complete the installation. Two hours after the fuel supply to the ceramic burner 2 was stopped, two auxiliary combustion burners of 800 × 10 3 kcal / Hr in the upper combustion chamber above the insulating dome 11 were ignited, and the upper combustion chamber above the insulating dome 11 was ignited. The furnace temperature was 650 ° C. or higher, the opening of the flue gas flow control valve was adjusted, and the furnace pressure in the upper combustion chamber above the heat insulating dome 11 was maintained at a negative pressure of −1.5 to −2.0 mmAq.
【００２０】断熱ドーム１１より下方の下部燃焼室の内
面には、セラミックファイバーを厚さ２０〜３０ｍｍで
吹付けた。断熱ドーム１１より下方の下部燃焼室の冷却
は、セラミックバーナ２下部の燃料ガス供給管３および
燃焼用空気供給管４に接続した７０００Ｎｍ3／Ｈｒの
吸引ブロワ２８で排気してセラミックバーナ２の直上の
マンホール５から外気を吸入させて強制冷却を行った。
また、断熱ドーム１１より下方の下部燃焼室の炉内圧力
は、断熱ドーム１１より上方の上部燃焼室の炉内圧力と
同じ−１．５〜−２．０ｍｍＡｑの負圧に保持した。そ
して、断熱ドーム１１搬入後の断熱ドーム１１の上部室
の珪石煉瓦表面温度と、断熱ドーム１１の下部室の雰囲
気温度推移を測定した。その結果を図４に示す。A ceramic fiber having a thickness of 20 to 30 mm was sprayed on the inner surface of the lower combustion chamber below the heat insulating dome 11. Cooling of the lower combustion chamber below the adiabatic dome 11 is evacuated by a 7000 Nm 3 / Hr suction blower 28 connected to the fuel gas supply pipe 3 and the combustion air supply pipe 4 below the ceramic burner 2, and directly above the ceramic burner 2. The air was sucked from the manhole 5 to perform forced cooling.
The furnace pressure in the lower combustion chamber below the heat insulating dome 11 was maintained at the same negative pressure of -1.5 to -2.0 mmAq as the furnace pressure in the upper combustion chamber above the heat insulating dome 11. Then, the surface temperature of the silica brick in the upper chamber of the heat insulating dome 11 after the carry-in of the heat insulating dome 11 and the transition of the ambient temperature in the lower chamber of the heat insulating dome 11 were measured. FIG. 4 shows the results.
【００２１】図４に示すとおり、断熱ドーム１１より下
方の下部燃焼室およびセラミックバーナ２の雰囲気温度
は、断熱ドーム１１搬入から５時間後に作業可能な雰囲
気温度５０℃まで低下することができた。その結果、セ
ラミックバーナ２の格子煉瓦補修は、熱風炉停止後、断
熱ドーム１１搬入準備に９時間、断熱ドーム１１搬入か
ら冷却完了（断熱ドーム１１より下方の下部燃焼室およ
びセラミックバーナ２を５０℃以下まで冷却）まで５時
間、格子煉瓦積替え作業に１３時間、積替え格子煉瓦の
昇熱乾燥に１５時間の計４２時間で完了させることがで
きた。As shown in FIG. 4, the ambient temperature of the lower combustion chamber below the insulating dome 11 and the ceramic burner 2 could be lowered to 50 ° C., which is the working temperature after 5 hours from the introduction of the insulating dome 11. As a result, the grid brick repair of the ceramic burner 2 is completed after the hot blast stove is stopped and the heat-insulating dome 11 is prepared for carrying in for 9 hours, and the cooling is completed after the heat-insulating dome 11 is carried in (the lower combustion chamber below the heat-insulating dome 11 and the ceramic burner 2 are heated to 50 ° C.). (Cooling to below) was completed in a total of 42 hours, 5 hours for the grid brick refilling operation, 13 hours for the transfiguration lattice bricks, and 15 hours for heating and drying the translucent lattice bricks.
【００２２】[0022]
【発明の効果】以上述べたとおり、この発明方法によれ
ば、熱風炉の燃焼室下方のセラミックバーナの熱間補修
に際し、セラミックバーナ部の冷却時間を大幅に短縮す
ることができ、早期に正常運転に復帰できるので、高炉
の生産性の低下を大幅に抑制することができる。As described above, according to the method of the present invention, the time required for cooling the ceramic burner portion during hot repair of the ceramic burner below the combustion chamber of the hot blast stove can be greatly reduced, and the normal time can be shortened. Since the operation can be returned to operation, a decrease in the productivity of the blast furnace can be significantly suppressed.
【図１】この発明方法を実施している状態を示す概略説
明図である。FIG. 1 is a schematic explanatory view showing a state in which the method of the present invention is performed.
【図２】熱風炉の燃焼室へ搬入前の防熱装置の斜視図で
ある。FIG. 2 is a perspective view of the heat insulating device before being carried into a combustion chamber of a hot blast stove.
【図３】この発明方法実施時の熱風炉燃焼室の状況を示
す一部切り欠き斜視図である。FIG. 3 is a partially cutaway perspective view showing a state of a hot blast stove combustion chamber when the method of the present invention is carried out.
【図４】実施例２における断熱ドーム搬入後の断熱ドー
ムの上部室の珪石煉瓦表面温度と、断熱ドームの下部室
の雰囲気温度推移を示すグラフである。FIG. 4 is a graph showing the transition of the surface temperature of the silica brick in the upper chamber of the heat-insulating dome and the ambient temperature transition of the lower chamber of the heat-insulating dome after the heat-insulating dome is carried in Example 2.
【図５】熱風炉の燃焼時と送風時の概略断面図である。FIG. 5 is a schematic cross-sectional view of the hot blast stove when burning and when blowing air.
【図６】セラミックバーナの構造を示す一部切り欠き斜
視図である。FIG. 6 is a partially cutaway perspective view showing the structure of a ceramic burner.
１、５１ 燃焼室 ２、５６ セラミックバーナ ３、７１ 燃料ガス供給管 ４、７２ 燃焼用空気供給管 ５ マンホール １１ 断熱ドーム １２ 上面クロス １３ ドーナツリング部 １４ 支持梁 １５ 支持機構 １６ 本体フレーム １７ スクリューネジ １８ ナット １９ 支柱 ２０ 受台 ２１ 外輪 ２２ 補助燃焼バーナ ２３、２４ 開閉弁 ２５、２６ 排気管 ２７ 流量調整弁 ２８ 吸引ブロワ ２９ 作業デッキ ５２ 蓄熱室 ５３ 混冷室 ５４ 燃料ガス ５５ 燃焼用空気 ５７ 蓄熱煉瓦 ５８ 煙道 ５９ 煙突 ６０ 送風管 ６１ 温度調整用空気 ６２ 熱風本管 ７３ プレート煉瓦 ７４ 格子煉瓦 DESCRIPTION OF SYMBOLS 1, 51 Combustion chamber 2, 56 Ceramic burner 3, 71 Fuel gas supply pipe 4, 72 Combustion air supply pipe 5 Manhole 11 Insulated dome 12 Top cross 13 Donut ring part 14 Support beam 15 Support mechanism 16 Body frame 17 Screw screw 18 Nut 19 Prop 20 Cradle 21 Outer ring 22 Auxiliary combustion burner 23, 24 Open / close valve 25, 26 Exhaust pipe 27 Flow control valve 28 Suction blower 29 Work deck 52 Heat storage room 53 Mixing room 54 Fuel gas 55 Combustion air 57 Heat storage brick 58 Chimney 59 Chimney 60 Air duct 61 Air for temperature control 62 Hot air main pipe 73 Plate brick 74 Lattice brick
フロントページの続き (72)発明者 米田 弥一 和歌山県和歌山市湊1850番地 住友金属 工業株式会社 和歌山製鉄所内 (58)調査した分野(Int.Cl.6，ＤＢ名) C21B 9/10 303 F27B 1/10 F27D 1/16 Continuing from the front page (72) Inventor Yaichi Yoneda 1850 Minato, Wakayama-shi, Wakayama Sumitomo Metal Industries, Ltd. Wakayama Steel Works (58) Field surveyed (Int. Cl. 6 , DB name) C21B 9/10 303 F27B 1 / 10 F27D 1/16
Claims (1)
修するに際し、耐火繊維クロスを縫製した空気送風によ
り膨らむ折畳み式の断熱ドームを、セラミックバーナと
燃焼室との境に設けられたマンホールから搬入して燃焼
室下部に水平に取付け、上部燃焼室と下部燃焼室および
セラミックバーナとに遮断し、断熱ドームより上方の上
部燃焼室は補助加熱バーナで６００℃以上に保持し、断
熱ドームより下方の下部燃焼室は側壁にセラミックファ
イバーを吹付けると共に、セラミックバーナ下部から吸
引ブロワで吸引し、断熱ドームを搬入したマンホールか
ら外気を吸い込ませ、かつ断熱ドームより上方の上部燃
焼室と下方の下部燃焼室共に炉内圧力を同一負圧に保持
することを特徴とする熱風炉セラミックバーナ補修時の
強制冷却方法。When a ceramic burner of a blast furnace hot air stove is hot-repaired, a foldable insulated dome which is inflated by air blasting a refractory fiber cloth is carried in from a manhole provided at a boundary between the ceramic burner and the combustion chamber. And horizontally mounted below the combustion chamber, shut off from the upper combustion chamber, the lower combustion chamber and the ceramic burner. The upper combustion chamber above the insulated dome is maintained at 600 ° C or higher by an auxiliary heating burner, In the lower combustion chamber, ceramic fibers are sprayed on the side wall, suction is performed from the lower part of the ceramic burner with a suction blower, the outside air is sucked in from the manhole into which the insulating dome is carried, and the upper combustion chamber above the insulating dome and the lower combustion chamber below. A forced cooling method for repairing a ceramic burner in a hot blast stove, wherein the furnace pressure is maintained at the same negative pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15251295A JP2962192B2 (en) | 1995-05-26 | 1995-05-26 | Forced cooling method at the time of hot air stove ceramic burner repair |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15251295A JP2962192B2 (en) | 1995-05-26 | 1995-05-26 | Forced cooling method at the time of hot air stove ceramic burner repair |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08325615A JPH08325615A (en) | 1996-12-10 |
| JP2962192B2 true JP2962192B2 (en) | 1999-10-12 |
Family
ID=15542078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15251295A Expired - Lifetime JP2962192B2 (en) | 1995-05-26 | 1995-05-26 | Forced cooling method at the time of hot air stove ceramic burner repair |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2962192B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100500137B1 (en) * | 2002-12-11 | 2005-07-11 | 주식회사 포스코 | Method for Repairing of Hot Stove |
| CN110527770A (en) * | 2018-06-27 | 2019-12-03 | 广东韶钢松山股份有限公司 | The hot detection method of hot-blast stove internal high temperature under a kind of non-Status of hugh wind of blast furnace |
| CN113697885B (en) * | 2021-08-31 | 2022-03-08 | 湖州恒辉科技有限公司 | Large-span telescopic movable ceiling |
| CN113718076B (en) * | 2021-09-18 | 2022-11-15 | 重庆钢铁股份有限公司 | Method for repairing hot air outlet of hot air furnace |
-
1995
- 1995-05-26 JP JP15251295A patent/JP2962192B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08325615A (en) | 1996-12-10 |
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