JPH075997B2 - High-temperature gas sealing device for furnace opening of non-oxidizing furnace - Google Patents
High-temperature gas sealing device for furnace opening of non-oxidizing furnaceInfo
- Publication number
- JPH075997B2 JPH075997B2 JP23618586A JP23618586A JPH075997B2 JP H075997 B2 JPH075997 B2 JP H075997B2 JP 23618586 A JP23618586 A JP 23618586A JP 23618586 A JP23618586 A JP 23618586A JP H075997 B2 JPH075997 B2 JP H075997B2
- Authority
- JP
- Japan
- Prior art keywords
- furnace
- strip
- gas
- oxidizing
- combustion
- 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 - Fee Related
Links
Classifications
-
- Y02W30/54—
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、無酸化炉の炉口シール装置に関するものであ
る。TECHNICAL FIELD The present invention relates to a furnace opening sealing device for an oxidation-free furnace.
無酸化炉、特に直火式の無酸化炉（以下、これを「NO
F」と略記する）は、連続溶融亜鉛めっき設備やけい素
鋼板連続熱処理設備に使用されるものである。かかる
“NOF"は、Ｃガス、LPG等を空熱比0.85〜0.97で不完全
燃焼させて炉内をCO-CO2‐H2‐H2Oの弱酸化性雰囲気と
し、通板導入するストリップを1000〜1300℃の高温下に
保持し、付着する油脂分を分解除去する一方、炉内の弱
酸化性を利用して該ストリップの表面酸化度制御下の状
態に加熱する炉である。従って、炉内雰囲気の維持が極
めて重要な技術課題である。Non-oxidizing furnace, especially direct-fired non-oxidizing furnace (hereinafter referred to as "NO
Abbreviated as "F") is used for continuous hot dip galvanizing equipment and continuous heat treatment equipment for silicon steel sheets. Such "NOF" is, C gas, strip by incomplete combustion of the LPG or the like in Soranetsuhi 0.85 to 0.97 in the furnace as a weakly oxidizing atmosphere CO-CO 2 -H 2 -H 2 O, introduced through plate Is maintained at a high temperature of 1000 to 1300 ° C. to decompose and remove the adhering fats and oils while heating the strip to a state where the surface oxidation degree of the strip is controlled by utilizing the weak oxidizing property. Therefore, maintaining the atmosphere in the furnace is a very important technical issue.
（従来の技術） 従来、NOFの鋼帯（ストリップ）入・出口部のシール手
段には、シールロールを使う方法、炉内燃焼生成ガス
（雰囲気ガス）を冷却還流させて使う方法などが提案さ
れている。(Prior Art) Conventionally, as a sealing means for the inlet and outlet of the NOF steel strip (strip), there has been proposed a method of using a seal roll, a method of cooling and refluxing a combustion product gas (atmosphere gas) in a furnace, and the like. ing.
上記従来技術のうち、前者のものはシールロールのみに
よる方法であるから、該シールロールが炉内からの受熱
により変形したような場合に満足できる気密性が得られ
ない。これを避けるためにロールを水冷して変形防止を
図ると、出口部でストリップが冷却され、好ましくない
結果を生む。Of the above-mentioned conventional techniques, the former one is a method using only a seal roll, and therefore, when the seal roll is deformed by heat received from the inside of the furnace, satisfactory airtightness cannot be obtained. In order to avoid this, if the roll is water-cooled to prevent deformation, the strip is cooled at the outlet portion, which has an unfavorable result.
一方、後者のものは、特開昭50-150610号公報に開示さ
れているように、炉内で生成した加熱用燃焼ガスを吸引
し、送風機の耐熱温度まで一旦冷却してから、入口部に
導いてガス噴射するという炉内雰囲気ガスの還流使用の
方法であり、冷却された雰囲気ガスを使用するため、ス
トリップの冷却が起るので出口部シールに適用できな
い。これに対応させるために耐熱送風機の使用が考えら
れるがコスト高となる欠点が残る。On the other hand, the latter, as disclosed in Japanese Patent Laid-Open No. 50-150610, sucks in the combustion gas for heating generated in the furnace, once cools it to the heat resistant temperature of the blower, and then at the inlet. This is a method of recirculating the atmosphere gas in the furnace by injecting and injecting the gas. Since the cooled atmosphere gas is used, cooling of the strip occurs, so that it cannot be applied to the outlet seal. The use of a heat-resistant blower may be considered to cope with this, but there is a drawback that the cost becomes high.
（発明が解決しようとする問題点） 本発明の目的は、NOFのストリップ入・出口部シール技
術に関しての上記従来技術が抱える問題点、即ちシール
ロールの冷却や炉内雰囲気ガスを冷却して還流使用する
ときに起きるストリップへの悪影響を回避することにあ
る。そして、確実なシールを実現して有毒ガスの漏洩と
設備保護を図ることにある。(Problems to be Solved by the Invention) An object of the present invention is to have a problem with the above-mentioned conventional technology regarding the strip inlet / outlet sealing technology of NOF, that is, to cool the seal roll or cool the atmosphere gas in the furnace to recirculate. The purpose is to avoid adverse effects on the strip that occur during use. Then, it is to realize a reliable seal to protect the equipment from leakage of toxic gas.
（問題点を解決するための手段） 上掲の目的は、次の事項を骨子とする要旨構成の採用に
よって実現が可能である。すなわち、本発明にかかる無
酸化炉の炉口高温ガスシール装置は、炉口スロート部
に、炉体の幅方向にわたって、炉内雰囲気と同等組成の
炉口シール用燃焼ガスを生成してストリップを加熱する
燃焼バーナーのノズルをストリップの両面に対設させて
成るものであり、この装置によれば、高温の燃焼ガスを
直接ストリップに噴射することになり、その燃焼ガスに
より、高温ガスカーテンを形成しガスシールを効果的に
実現する。(Means for Solving Problems) The above-mentioned purpose can be realized by adopting a gist structure having the following points as the main points. That is, the furnace opening high temperature gas sealing device of the non-oxidizing furnace according to the present invention, in the furnace throat portion, across the width direction of the furnace body, to generate a combustion gas for furnace opening sealing of the same composition as the atmosphere in the furnace to strip the strip. Nozzles of a combustion burner to be heated are arranged opposite to each other on both sides of the strip. According to this device, high temperature combustion gas is directly injected to the strip, and the combustion gas forms a high temperature gas curtain. Effectively realizes gas sealing.
（作用） 本発明装置を好適例を示す第１〜３図にもとづき具体的
に説明する。(Operation) The device of the present invention will be specifically described with reference to FIGS.
第１図はNOFの入口部分を示す。図示の１は炉体であっ
て、ストリップ３の通板ルートに沿って多数の加熱バー
ナー２が列設してあり、導入する入口部にはシール機構
４が配設してある他、炉内には複数個のハースロール５
が配設してある。図示の６は加熱用バーナー２から発生
した燃焼ガス（弱酸化性炉内雰囲気ガス）の排気口、７
はこの排気口内に設けた炉圧調整用ダンパーを示す。Figure 1 shows the NOF inlet. Reference numeral 1 denotes a furnace body, in which a large number of heating burners 2 are arranged in line along a strip passing route of the strip 3, and a seal mechanism 4 is arranged at an inlet portion to be introduced, as well as in the furnace. There are 5 hearth rolls
Is provided. Reference numeral 6 denotes an exhaust port for combustion gas (weak oxidizing furnace atmosphere gas) generated from the heating burner 2, and 7
Indicates a damper for adjusting the furnace pressure provided in the exhaust port.
第２図は、本発明シール装置例であって、ストリップ入
口部分の詳細構造を例示したもので、その入口にはまず
ストリップ３を挟みつけるように一対のシールロール8,
9が回転自在に設置してあり、このシールロール8,9の後
方隣接位置には炉内の気密保持のためにカウンターウエ
イト13の如き加圧機構を有するシール部材11,12が配設
してあり、そしてその後方スロート部10にはストリップ
に向けて噴射するシールガス発生用燃焼バーナー16a,16
bが配設してある。FIG. 2 is an example of a sealing device of the present invention, which illustrates a detailed structure of a strip inlet portion. A pair of seal rolls 8 and 8 are provided at the inlet so that the strip 3 is sandwiched first.
9 is rotatably installed, and seal members 11 and 12 having a pressurizing mechanism such as a counterweight 13 for maintaining airtightness in the furnace are provided at positions adjacent to the rear of the seal rolls 8 and 9. And, in the rear throat portion 10, there is a combustion burner 16a for generating a seal gas, which is injected toward the strip.
b is provided.
前記シールガス発生用燃焼バーナー16a,16bは、第３図
に示すような構造のもので、燃焼用空気導入口14および
燃料導入口15とをスロート部17で会合させ、燃焼室18お
よびノズル19を経てストリップ面に向けて炉内雰囲気と
同等組成（弱酸化性）の炉口シール用燃焼ガスを噴射す
るようになっている。ノズル19の形状としては、スロー
ト部19で完全なシールを実現するために、第４図（ａ）
の如き幅方向にわたるスリット上のノズル19a、同図
（ｂ）の如き千鳥状に配置した複数の短いスリット状ノ
ズル19b、および同図（ｃ）の如きマルチホール形ノズ
ル19cなどが好適である。The combustion burners 16a, 16b for generating the seal gas have a structure as shown in FIG. 3, and the combustion air introduction port 14 and the fuel introduction port 15 are associated with each other at the throat portion 17, and the combustion chamber 18 and the nozzle 19 are connected. After that, the combustion gas for the furnace opening seal having the same composition (weakly oxidizing) as the atmosphere in the furnace is injected toward the strip surface. The shape of the nozzle 19 is shown in FIG. 4 (a) in order to achieve a perfect seal at the throat portion 19.
It is preferable to use a nozzle 19a on a slit extending in the widthwise direction, a plurality of short slit-shaped nozzles 19b arranged in a zigzag pattern as shown in FIG. 11B, and a multi-hole nozzle 19c shown in FIG.
要するに本発明は、上述の如き燃焼バーナー16a,16bか
ら、炉内雰囲気と同等組成のCO-CO2‐H2‐H2Oの弱酸化
性燃焼ガスを、直接通板ストリップ３の上下面に噴射し
て外気とのシールを果たす技術である。In short, the present invention uses the above-mentioned combustion burners 16a, 16b to directly apply the weakly oxidizing combustion gas of CO-CO 2 -H 2 -H 2 O having the same composition as the atmosphere in the furnace to the upper and lower surfaces of the strip 3 to be threaded. It is a technology that injects air and seals with the outside air.
（実施例） 第４図（ａ）に示すようなノズルを有する燃焼用バーナ
ーを、炉長25mm、炉内幅1.8m、炉温1000〜1300℃に保持
するNOFの入口側、出口側の各スロート部に設置して成
る本発明装置の実施の効果を確認した。(Example) A combustion burner having a nozzle as shown in FIG. 4 (a) was used for each of the inlet side and the outlet side of a NOF that maintains a furnace length of 25 mm, a furnace inner width of 1.8 m, and a furnace temperature of 1000 to 1300 ° C. The effect of implementation of the device of the present invention installed in the throat part was confirmed.
炉内の酸素濃度を測定したところ、従来程度であった
が、この実施例では0.05％と充分なシール効果が得られ
た。When the oxygen concentration in the furnace was measured, it was about the conventional level, but in this example, a sufficient sealing effect of 0.05% was obtained.
なお、用いた上記燃焼用バーナーは、上下ともに50×10
3Kcal/h、スリット隙間5mm、スリットの幅1.8mのもので
ある。The combustion burner used was 50 x 10
3 Kcal / h, slit gap 5mm, slit width 1.8m.
（発明の効果） 本発明は、燃焼バーナーを直接ガスシール装置に用いて
成る無酸化炉の炉口高温ガスシール装置であって、シス
テムが簡単であると同時に炉入口はもとより出口にも有
利に適用できるものであり、本発明によれば、炉内雰囲
気と外気との効果的なシールを行うことができ、炉内雰
囲気を安定維持できる。(Effect of the Invention) The present invention is a furnace high temperature gas sealer for a non-oxidizing furnace, which uses a combustion burner directly as a gas sealer, and has a simple system and is advantageous not only for the furnace inlet but also for the outlet. It is applicable, and according to the present invention, it is possible to effectively seal the atmosphere inside the furnace and the outside air, and to maintain the atmosphere inside the furnace stably.
第１図は、本発明装置を適用したNOFの部分断面図、 第２図は、NOFの入口部の詳細を示す拡大断面図、 第３図は、シールガス発生用燃焼バーナーの断面図、 第４図の（ａ），（ｂ），（ｃ）は、本発明装置に用い
るバーナーに適合するノズルの形状を示す断面図であ
る。 １…炉体、２…加熱バーナー ３…ストリップ、４…シール機構 ５…ハースロール、６…燃焼ガス排気口 ７…炉圧調整用ダンパー 8,9…シールロール 10…スロート部、11,12…シール部材 13…カウンターウエイト 14…空気導入口、15…燃料導入口 16a,16b…シールガス発生用燃焼バーナー 17…スロート部 18…燃焼室、19a,19b,19c…ノズルFIG. 1 is a partial cross-sectional view of a NOF to which the device of the present invention is applied, FIG. 2 is an enlarged cross-sectional view showing details of an inlet portion of the NOF, and FIG. 3 is a cross-sectional view of a combustion burner for generating seal gas. 4 (a), (b), and (c) are cross-sectional views showing the shape of the nozzle suitable for the burner used in the device of the present invention. 1 ... Furnace body, 2 ... Heating burner 3 ... Strip, 4 ... Sealing mechanism 5 ... Hearth roll, 6 ... Combustion gas exhaust port 7 ... Furnace pressure adjusting damper 8, 9 ... Seal roll 10 ... Throat part, 11, 12 ... Seal member 13 ... Counterweight 14 ... Air inlet port, 15 ... Fuel inlet port 16a, 16b ... Combustion burner for generating seal gas 17 ... Throat part 18 ... Combustion chamber, 19a, 19b, 19c ... Nozzle
───────────────────────────────────────────────────── フロントページの続き (72)発明者 武田 砂夫 岡山県倉敷市水島川崎通１丁目（番地な し） 川崎製鉄株式会社水島製鉄所内 (72)発明者 兵頭 金章 広島県広島市西区観音新町４丁目６番22号 三菱重工業株式会社広島製作所内 (72)発明者 田村 耕一 広島県広島市西区観音新町４丁目６番22号 三菱重工業株式会社広島製作所内 (56)参考文献 特開 昭50−150610（ＪＰ，Ａ) 実開 昭60−185650（ＪＰ，Ｕ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Sunao Takeda 1-chome, Mizushima Kawasaki-dori, Kurashiki City, Okayama Prefecture (no address) Inside the Mizushima Works, Kawasaki Steel Co., Ltd. 4-6-22 Shinmachi Mitsubishi Heavy Industries, Ltd. Hiroshima Works (72) Inventor Koichi Tamura 4-6-22 Kannon Shinmachi, Nishi-ku, Hiroshima-shi, Hiroshima Mitsubishi Heavy Industries Ltd. (56) References JP-A-50 -150610 (JP, A) Actually opened 60-185650 (JP, U)
Claims (1)
向にわたって、炉内雰囲気と同等組成の炉口シール用燃
焼ガスを生成してストリップを加熱する燃焼バーナーの
ノズルをストリップの両面に対設して成る無酸化炉の炉
口高温ガスシール装置。1. A nozzle of a combustion burner for heating a strip by producing a combustion gas for sealing a furnace opening having the same composition as the atmosphere in the furnace in the furnace throat portion of a non-oxidizing furnace across the width direction of the furnace. High-temperature gas sealing device for the furnace opening of a non-oxidizing furnace that is installed on both sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23618586A JPH075997B2 (en) | 1986-10-06 | 1986-10-06 | High-temperature gas sealing device for furnace opening of non-oxidizing furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23618586A JPH075997B2 (en) | 1986-10-06 | 1986-10-06 | High-temperature gas sealing device for furnace opening of non-oxidizing furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6393829A JPS6393829A (en) | 1988-04-25 |
| JPH075997B2 true JPH075997B2 (en) | 1995-01-25 |
Family
ID=16997032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23618586A Expired - Fee Related JPH075997B2 (en) | 1986-10-06 | 1986-10-06 | High-temperature gas sealing device for furnace opening of non-oxidizing furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH075997B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2953221B1 (en) * | 2009-11-30 | 2013-06-14 | Fives Stein | DEVICE FOR MAINTAINING DRY THE ATMOSPHERE OF A NIGHT BURNING OVEN FOR METAL STRIP, AND OVEN EQUIPPED WITH SAID DEVICE |
| JP6450109B2 (en) * | 2014-08-11 | 2019-01-09 | Ｊｆｅスチール株式会社 | Steel strip manufacturing equipment |
| JP6451138B2 (en) * | 2014-08-11 | 2019-01-16 | Ｊｆｅスチール株式会社 | Steel strip manufacturing method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50150610A (en) * | 1974-05-24 | 1975-12-03 |
-
1986
- 1986-10-06 JP JP23618586A patent/JPH075997B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6393829A (en) | 1988-04-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |