JPH0625346U - External combustion hot air stove connection structure - Google Patents
External combustion hot air stove connection structureInfo
- Publication number
- JPH0625346U JPH0625346U JP6163092U JP6163092U JPH0625346U JP H0625346 U JPH0625346 U JP H0625346U JP 6163092 U JP6163092 U JP 6163092U JP 6163092 U JP6163092 U JP 6163092U JP H0625346 U JPH0625346 U JP H0625346U
- Authority
- JP
- Japan
- Prior art keywords
- dome
- connecting pipe
- external combustion
- air stove
- combustion hot
- 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.)
- Granted
Links
Landscapes
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
(57)【要約】
【目的】 伸縮継手部の過大な膨張、収縮ならびに連結
梁とドーム鉄皮との付け根部の過大な応力集中を緩和し
連結管部の補修の必要を大きく減じた外燃式熱風炉の提
案。
【構成】 連結管と蓄熱室および燃焼室ドームを夫々接
続する付け根部の補強板を複数の連結梁で該連結管をと
り囲むように連結した。
(57) [Abstract] [Purpose] Excessive expansion and contraction of expansion joints, and excessive concentration of stress at the joint between the connecting beam and the dome iron skin alleviate the need for repair of connecting pipes Type hot blast stove proposal. [Structure] Reinforcing plates at the bases connecting the connecting pipe to the heat storage chamber and the combustion chamber dome are connected by a plurality of connecting beams so as to surround the connecting pipe.
Description
【0001】[0001]
本考案は高炉の付属設備である外燃式熱風炉に関するものである。 The present invention relates to an external combustion hot-air stove which is an auxiliary equipment of a blast furnace.
【0002】[0002]
一般に高炉等に吹き込む空気を予熱する設備のひとつとして外熱式熱風炉と内 熱式熱風炉が知られている。例えば、丸善(株)昭和54年10月発行第3版鉄鋼便 覧II製銑・製鋼 301頁には外燃式熱風炉のいくつかのタイプが示されている。こ れらの外熱式熱風炉は高炉ガスとコークスガスを導いてこれを燃焼させる燃焼室 とその熱量を蓄熱する蓄熱室とに分離構成され、それらを炉頂部でドーム連結管 により連結され蓄熱及び熱風の供給を行っている。 Generally, an external heating type hot stove and an internal heating type hot stove are known as one of the facilities for preheating air blown into a blast furnace or the like. For example, Maruzen Co., Ltd., October 1979, 3rd edition Iron and Steel Handbook II, Ironmaking and Steelmaking, page 301, shows several types of external combustion hot stoves. These external heating hot blast stoves are separated into a combustion chamber that guides and burns blast furnace gas and coke gas and a heat storage chamber that stores the amount of heat, and these are connected by a dome connecting pipe at the top of the furnace. And supplying hot air.
【0003】 また、一般にドーム連結管は図3及び図5に示すように、内圧の変化ならびに 熱風温度の変化に伴う膨張、収縮を吸収する伸縮継手6を有している。しかしな がら、炉内圧の大きな変動又は地震時や風の抵抗を受けたときに伸縮継手6が過 剰に拡がることを防止するために、特開昭50−104707号公報では図3及び図4に 示すように蓄熱室ドーム3と燃焼室ドーム4とを連結梁7dで連結している。ま た図5に示すように蓄熱室1と燃焼室2の直胴部を連結梁7eで連結しているも のもある。In general, the dome connecting pipe has an expansion joint 6 that absorbs expansion and contraction due to changes in internal pressure and changes in hot air temperature, as shown in FIGS. 3 and 5. However, in order to prevent the expansion joint 6 from excessively expanding in the event of large fluctuations in the furnace pressure, earthquakes, or wind resistance, in Japanese Patent Laid-Open No. 50-104707, FIGS. As shown in, the heat storage chamber dome 3 and the combustion chamber dome 4 are connected by the connecting beam 7d. Further, as shown in FIG. 5, there is a case where the straight body portions of the heat storage chamber 1 and the combustion chamber 2 are connected by a connecting beam 7e.
【0004】[0004]
しかしながら、前記の特開昭50−104707号公報の方法では、図4に示す連結梁 7dとドーム鉄皮3、4との付け根部(接続部)11に大きな応力が発生し、応力 腐食割れを起こし、破損するという問題がある。 また図5に示す、直胴部間を連結梁7eで結ぐ方法では、炉内圧の変動や炉内 温度の変動により、伸縮継手6部の膨張・収縮が繰り返され、伸縮継手6の内部 ライニングの耐火物に亀裂や脱落を起こし、伸縮継手6が焼損するという問題が ある。 However, according to the method disclosed in Japanese Patent Laid-Open No. 50-104707, a large stress is generated at the root portion (connection portion) 11 of the connecting beam 7d and the dome iron skins 3 and 4 shown in FIG. There is a problem of waking up and breaking. In the method of connecting the straight body portions with the connecting beam 7e shown in FIG. 5, expansion / contraction of the expansion joint 6 is repeated due to fluctuations in the furnace pressure and the furnace temperature, and the internal lining of the expansion joint 6 is repeated. There is a problem that the refractory material of 1 is cracked or dropped, and the expansion joint 6 is burned out.
【0005】 従って、上記のようなトラブルの補修に際し、操業を中止し、ドームの鉄皮や 伸縮継手を交換せざるを得ず、もちろん、この補修の間は高炉操業を停止しなけ ればならないという問題がある。 本考案は、前記の問題点を解決し、伸縮継手部の過大な膨張、収縮ならびに連 結梁とドーム鉄皮との付け根部の過大な応力集中を緩和し補修の必要を大きく減 じた外燃式熱風炉を提供することを目的とするものである。Therefore, when repairing the above troubles, the operation must be stopped and the dome iron skin and expansion joint must be replaced. Of course, during this repair, the blast furnace operation must be stopped. There is a problem. The present invention solves the above problems and alleviates the excessive expansion and contraction of expansion joints and the excessive stress concentration at the joint between the connecting beam and the dome iron skin, thus greatly reducing the need for repair. It is intended to provide a combustion hot stove.
【0006】[0006]
本考案は、蓄熱室ドームと燃焼室ドームの側壁をドーム連結管で連結してなる 外燃式熱風炉において、該連結管と上記各ドームとを接続する付け根部の補強板 を複数の連結梁で該連結管をとり囲むように連結したことを特徴とする外燃式熱 風炉である。 The present invention relates to an external combustion hot-air stove in which the side walls of the heat storage chamber dome and the combustion chamber dome are connected by a dome connecting pipe, and a reinforcing plate at the base portion connecting the connecting pipe and each dome is provided with a plurality of connecting beams. The external combustion hot-air stove is characterized in that the connecting pipe is connected so as to surround the connecting pipe.
【0007】 本考案においては、連結管と各ドームとを接続する付け根部の補強板と連結梁 との接続は通常溶接により接続することができる。 また、連結梁は連結管を取り囲むように、ほぼ対称に10本以上設けることが望 ましい。本数が少ないと接続部で応力腐食割れを起こし易くなるからである。In the present invention, the connection between the connecting plate and the reinforcing plate of the base portion connecting the connecting pipe and each dome can be usually connected by welding. In addition, it is desirable that 10 or more connecting beams should be installed symmetrically so as to surround the connecting pipe. This is because if the number is small, stress corrosion cracking is likely to occur at the connection part.
【0008】[0008]
本考案では図1、図2に示すように、蓄熱室ドーム3と燃焼室ドーム4のそれ ぞれのドームと連結管5の付け根部の補強板9上に複数の連結梁7aを設け炉内 圧をかけた時に発生する応力を分散する。また、この連結梁7aにより連結管伸 縮継手6は過剰に拡がらないため、連結管5及び連結管伸縮継手6の内部レンガ を損傷させることもない。 In the present invention, as shown in FIGS. 1 and 2, a plurality of connecting beams 7a are provided on the respective dome of the heat storage chamber dome 3 and the combustion chamber dome 4 and the reinforcing plate 9 at the base of the connecting pipe 5. Disperses the stress that occurs when pressure is applied. Further, since the connecting pipe expansion joint 6 is not excessively expanded by the connecting beam 7a, the inner bricks of the connecting pipe 5 and the connecting pipe expansion joint 6 are not damaged.
【0009】 よって補修を要しない長寿命の熱風炉を得ることができる。Therefore, it is possible to obtain a hot-blast stove which has a long life and requires no repair.
【0010】[0010]
【実施例】 図1は本考案の一実施例を示す全体概略図であり、図2は図1の連結管5近傍 の部分拡大図である。連結管5と各ドーム3、4は補強板9を介して接続されて いる。6は伸縮継手である。7aが連結梁でその両端は夫々の補強板9に溶接に より接続されている。Embodiment FIG. 1 is an overall schematic view showing an embodiment of the present invention, and FIG. 2 is a partially enlarged view of the vicinity of the connecting pipe 5 of FIG. The connecting pipe 5 and each dome 3, 4 are connected via a reinforcing plate 9. 6 is an expansion joint. Reference numeral 7a is a connecting beam, and both ends thereof are connected to respective reinforcing plates 9 by welding.
【0011】 因みに、ドーム間距離が14m、連結管の外径が5mの外焼式熱風炉で、連結管 5を取り囲むように本考案の連結梁7aを16本設置し送風圧が約 4.5kg/cm2 、 送風温度が約1300℃、燃焼時間が2Hrで送風時間が2Hrを1サイクルとする操業 で行ったところ、蓄熱室ドームと燃焼室ドームの頂点間の距離は送風時に従来、 25mm伸びたものが、 2.5mm伸びに減少した。By the way, in an outer-burning hot-air stove with a dome distance of 14 m and a connecting pipe outer diameter of 5 m, 16 connecting beams 7a of the present invention are installed so as to surround the connecting pipe 5, and the blowing pressure is about 4.5 kg. / Cm 2 , the blast temperature was about 1300 ° C, the combustion time was 2 hours, and the blast time was 2 hours. One cycle showed that the distance between the apex of the heat storage chamber dome and the combustion chamber dome increased by 25 mm when the air was blown. However, it decreased to 2.5 mm.
【0012】 また、連結梁7a設置により、連結梁7eの付け根部での応力は、従来1600kg /cm2 であったものが、 850kg/cm2 に軽減した。 更に、連結管伸縮継手6が、内部レンガの損傷のため、稼働後、2〜3ケ月で 従来 350℃まで上昇したのに対し、本考案の実施により、約80℃の低温を維持し た。Further, by connecting beams 7a installation, stress at the root portion of the connecting bar 7e are those which is conventionally 1600 kg / cm 2 was reduced to 850 kg / cm 2. Furthermore, the connection pipe expansion joint 6 was heated up to 350 ° C in a few months after the operation due to damage to the inner brick, but by implementing the present invention, a low temperature of about 80 ° C was maintained.
【0013】 以上のように、本考案の実施により、熱風炉は長期間安定な操業が可能になっ た。 なお、図1に示す実施例では、蓄熱室1と燃焼室2の夫々の直胴部を梁7eで 継ないでいるが、梁7eは本考案においてはかならずしも必要ではない。As described above, by carrying out the present invention, the hot-blast stove can be stably operated for a long period of time. In the embodiment shown in FIG. 1, the straight body portions of the heat storage chamber 1 and the combustion chamber 2 are not joined by the beam 7e, but the beam 7e is not always necessary in the present invention.
【0014】[0014]
本考案では複数の連結梁をドームと連結管の付け根部に付けることにより、連 結梁とその付け根に大きな応力が発生せず、また連結管の伸縮も少量で済むよう になった。このため応力腐食割れ、内部ライニングの耐火物の損傷を防ぐことが できるため当該部位の補修をほとんど要さず、外熱式熱風炉の操業が安定する。 従って高炉の安定操業にも寄与する効果が多大である。 In the present invention, by attaching a plurality of connecting beams to the base of the dome and the connecting pipe, a large stress is not generated in the connecting beam and its base, and the connecting pipe can be expanded and contracted in a small amount. Therefore, it is possible to prevent stress corrosion cracking and damage to the refractory of the inner lining, and repair of the relevant part is hardly required, and the operation of the external heating hot stove is stable. Therefore, the effect of contributing to stable operation of the blast furnace is great.
【図1】本考案に係る外燃式熱風炉の全体構造を示す側
面図である。FIG. 1 is a side view showing the overall structure of an external combustion hot stove according to the present invention.
【図2】図1の連結部近傍の部分拡大図である。FIG. 2 is a partially enlarged view of the vicinity of the connecting portion in FIG.
【図3】従来の外燃式熱風炉の全体構造を示す側面図で
ある。FIG. 3 is a side view showing the overall structure of a conventional external combustion hot-air stove.
【図4】図3の平面図である。FIG. 4 is a plan view of FIG.
【図5】従来の外燃式熱風炉の全体構造を示す側面図で
ある。FIG. 5 is a side view showing the overall structure of a conventional external combustion hot-air stove.
1 蓄熱室 2 燃焼室 3 蓄熱室ドーム 4 燃焼室ドーム 5 連結管 6 伸縮継手 7 連結梁 8 フランジ 9 補強板 10 リングガーター 11 応力の高い場所 1 heat storage chamber 2 combustion chamber 3 heat storage chamber dome 4 combustion chamber dome 5 connecting pipe 6 expansion joint 7 connecting beam 8 flange 9 stiffening plate 10 ring gutter 11 high stress place
───────────────────────────────────────────────────── フロントページの続き (72)考案者 柳沢 克彦 千葉県千葉市中央区川崎町1番地 川崎製 鉄株式会社千葉製鉄所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Katsuhiko Yanagisawa 1 Kawasaki-cho, Chuo-ku, Chiba-shi, Chiba Kawasaki Steel Co., Ltd. Chiba Works
Claims (1)
ーム連結管で連結してなる外燃式熱風炉において、該連
結管と上記各ドームとを接続する付け根部の補強板を複
数の連結梁で該連結管をとり囲むように連結したことを
特徴とする外燃式熱風炉。1. An external combustion hot-air stove in which the side walls of the heat storage chamber dome and the combustion chamber dome are connected by a dome connecting pipe, and a plurality of reinforcing plates at the base portion connecting the connecting pipe and each dome are connected. An external combustion hot air stove characterized in that the connection pipes are connected so as to surround the connection pipes.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6163092U JP2564453Y2 (en) | 1992-09-01 | 1992-09-01 | Connection structure of external combustion type hot stove |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6163092U JP2564453Y2 (en) | 1992-09-01 | 1992-09-01 | Connection structure of external combustion type hot stove |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0625346U true JPH0625346U (en) | 1994-04-05 |
JP2564453Y2 JP2564453Y2 (en) | 1998-03-09 |
Family
ID=13176709
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6163092U Expired - Fee Related JP2564453Y2 (en) | 1992-09-01 | 1992-09-01 | Connection structure of external combustion type hot stove |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2564453Y2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100447892B1 (en) * | 2000-12-06 | 2004-09-08 | 주식회사 포스코 | The exchangeable connecting pipe of hot stove having cooling ability |
-
1992
- 1992-09-01 JP JP6163092U patent/JP2564453Y2/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100447892B1 (en) * | 2000-12-06 | 2004-09-08 | 주식회사 포스코 | The exchangeable connecting pipe of hot stove having cooling ability |
Also Published As
Publication number | Publication date |
---|---|
JP2564453Y2 (en) | 1998-03-09 |
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Legal Events
Date | Code | Title | Description |
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LAPS | Cancellation because of no payment of annual fees |