JP2809318B2 - Atmosphere furnace gas passing method - Google Patents
Atmosphere furnace gas passing methodInfo
- Publication number
- JP2809318B2 JP2809318B2 JP2162199A JP16219990A JP2809318B2 JP 2809318 B2 JP2809318 B2 JP 2809318B2 JP 2162199 A JP2162199 A JP 2162199A JP 16219990 A JP16219990 A JP 16219990A JP 2809318 B2 JP2809318 B2 JP 2809318B2
- Authority
- JP
- Japan
- Prior art keywords
- cooling chamber
- air
- gas
- chamber
- heating
- 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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Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、シーグニングに先立って、冷却室（焼入
室）内の空気（酸素）を排除するガス通し方法に関し、
特に、変成炉ガスを使用せず、雰囲気炉に直接、炭化水
素ガス等の原料ガスを供給する方法に最適であることを
特徴とする。なお、加熱室内の空気は、室内が十分に高
温であるため、雰囲気ガスとの燃焼によって完全に消費
される。The present invention relates to a gas passing method for eliminating air (oxygen) in a cooling chamber (quenching chamber) prior to seaming.
In particular, it is characterized by being optimal for a method of supplying a raw material gas such as a hydrocarbon gas directly to an atmospheric furnace without using a shift furnace gas. Note that the air in the heating chamber is completely consumed by combustion with the atmospheric gas because the room has a sufficiently high temperature.
冷却室内に残っている空気と、加熱室内の雰囲気ガス
が一定割合で混合し、中間扉の流出口が火種になると、
急激な燃焼、すなわち、爆発が起り、危険である。When the air remaining in the cooling chamber and the atmospheric gas in the heating chamber are mixed at a certain ratio, and the outlet of the intermediate door becomes a fire,
Rapid combustion, or explosion, can be dangerous.
そこで、シーズニングに先立って冷却室内の空気を排
除する必要が生じる。Therefore, it is necessary to remove air from the cooling chamber prior to seasoning.
そのため、従来は、加熱室の入口扉と中間扉を閉じ、
さらに、冷却室の出口扉も閉じ、雰囲気ガスを加熱室へ
供給し、冷却室エキセスから火が着くのを待ってシーズ
ニングを行う方法、あるいは、加熱室の入口扉と中間扉
を閉じ、雰囲気ガスを加熱室へ供給し、中間扉の流出口
に火がついたら冷却室出口扉を閉じ、冷却室エキセスか
ら火が着くのを待ってシーズニングを行う方法等が採用
されている。Therefore, conventionally, the entrance door and the intermediate door of the heating chamber were closed,
In addition, the exit door of the cooling chamber is also closed, the atmosphere gas is supplied to the heating chamber, and the seasoning is performed after waiting for the fire from the cooling chamber exhaust, or the entrance door and the intermediate door of the heating chamber are closed, and the atmosphere gas is closed. Is supplied to the heating chamber, when the outlet of the intermediate door catches fire, the cooling chamber outlet door is closed, and the seasoning is performed after waiting for the fire from the cooling chamber exhaust.
しかしながら、冷却室では、火種が中間扉に設けられ
た流出口のみであるため、ある程度、冷却室内の空気が
消費されると流出する雰囲気ガスとの燃焼が停止され、
残された空気と加熱室内の雰囲気ガスが混合し、前記爆
発が生じることがあった。However, in the cooling chamber, since the fire is only the outlet provided in the intermediate door, when the air in the cooling chamber is consumed to some extent, the combustion with the outflowing atmospheric gas is stopped,
The remaining air and the atmospheric gas in the heating chamber were mixed, and the explosion sometimes occurred.
この爆発の危険性は、従来の変成炉ガスを使用する方
法においては、大量の雰囲気ガスが使用されるため、火
種も大きく、冷却室内の気体に流動がおこり、冷却室内
部空気の燃焼が比較的効率よく行われるため、少ない
が、近時、提供されている方法、すなわち、変成炉ガス
を使用せず、炉内に直接、炭化水素等の原料ガスを供給
する方法（特開昭59−222571号、特公平１−38870号）
では、使用されるガス量が従来の約10分の１と少ないた
め、火種である中間扉の流出口付近の空気が少なくなる
と、他の部分に空気が残されたまま消化され、爆発の危
険性が残される場合があった。The risk of this explosion is that the conventional method using the gas in the shift furnace uses a large amount of atmospheric gas, so the fire type is large, the gas in the cooling chamber flows, and the combustion of air inside the cooling chamber is compared. In order to carry out the process efficiently, a small number of methods recently provided, that is, a method of directly supplying a raw material gas such as hydrocarbons into a furnace without using a shift furnace gas (Japanese Unexamined Patent Publication No. No. 222571, Tokiko 1-38870)
In this case, the amount of gas used is about one-tenth of the conventional amount, so if the air near the outlet of the middle door, which is the kind of fire, decreases, the remaining parts will be digested with the air remaining, causing a risk of explosion. Sex was sometimes left.
本発明は、前記事情に鑑み、シーズニングに先立つ、
冷却室内の空気の排除を効率よく行い、爆発を防止し、
安全操業を確保することを目的とするものである。The present invention, in view of the above circumstances, prior to seasoning,
Efficiently removes air in the cooling room to prevent explosions,
The purpose is to ensure safe operation.
本発明は、前記目的を達成するため、冷却室エキセス
に内部負圧時に着火し、流入空気の燃焼を図るバーナを
設けた雰囲気炉を使用し、加熱室加熱後、中間扉を開い
て加熱室からの輻射熱により冷却室内の空気を膨張させ
て前記エキセスより流出させる工程、流出終了後、中間
扉を閉じ輻射熱を断って冷却室内も負圧するとともに前
記バーナに着火する工程、前記工程を数回繰り返して冷
却室内の空気を排除する工程、及びその後に加熱室に雰
囲気ガスを供給する工程とからなる方法としたものであ
る。In order to achieve the above object, the present invention uses an atmosphere furnace provided with a burner which ignites the cooling chamber exhaust at the time of internal negative pressure and burns inflow air, opens the intermediate door after heating the heating chamber, and opens the heating chamber. A step of expanding the air in the cooling chamber by the radiant heat from the air to flow out of the exhaust, closing the intermediate door, cutting off the radiant heat, negatively applying pressure to the cooling chamber and igniting the burner after the flow is finished, repeating the above steps several times. The method comprises a step of removing air from the cooling chamber by using the method and a step of subsequently supplying an atmospheric gas to the heating chamber.
通常、加熱室１の入口扉、中間扉４、冷却室２の出口
扉５及び冷却室エキセス７の開閉弁９は閉じられてい
る。Normally, the inlet door of the heating chamber 1, the intermediate door 4, the outlet door 5 of the cooling chamber 2, and the on-off valve 9 of the cooling chamber exhaust 7 are closed.
本発明では、加熱室１内がヒータにより加熱された
後、中間扉４が開かれる。In the present invention, after the inside of the heating chamber 1 is heated by the heater, the intermediate door 4 is opened.
その結果、輻射熱により冷却室２内の空気が膨張させ
られ、冷却室エキセス７の開閉弁９が押上げられて冷却
室２内の空気が流出させられる。As a result, the air in the cooling chamber 2 is expanded by the radiant heat, the on-off valve 9 of the cooling chamber exhaust 7 is pushed up, and the air in the cooling chamber 2 flows out.
つぎに、前記開閉弁９からの空気の流出が終了したら
中間扉４を閉じる。その結果、冷却室２内は、加熱室１
からの輻射熱が断たれ、負圧となる。Next, when the outflow of air from the on-off valve 9 is completed, the intermediate door 4 is closed. As a result, the inside of the cooling chamber 2 is
The radiant heat from is cut off, resulting in a negative pressure.
そこで、前記開閉弁９をソレノイド12により開放して
負圧の回復が図られるが、本発明では前記開閉弁９の開
放と同時、あるいは開閉弁９の開放より少し早目にリン
グバーナ15に着火が行われる。Therefore, the on-off valve 9 is opened by the solenoid 12 to recover the negative pressure. However, in the present invention, the ring burner 15 is ignited at the same time as the on-off valve 9 is opened or slightly earlier than the on-off valve 9 is opened. Is performed.
その結果、リングバーナ15の機械排ガスが冷却室２内
に流入し、冷却室２内の空気の濃度が低下させられ、か
つ燃焼を阻止する性質のCO2,N2,H2Oが多くなり、負圧が
解消される。As a result, the exhaust gas from the ring burner 15 flows into the cooling chamber 2, the concentration of air in the cooling chamber 2 is reduced, and the amount of CO 2 , N 2 , and H 2 O that inhibits combustion increases. , The negative pressure is eliminated.
前記工程を数回繰り返すとさらに安全性、すなわち、
冷却室２内の空気排除が完全となる。When the above process is repeated several times, further safety, that is,
The air removal in the cooling chamber 2 is completed.
本発明では、前記工程後、加熱室１に雰囲気ガスが供
給される。In the present invention, the atmosphere gas is supplied to the heating chamber 1 after the above step.
その結果加熱室１内は高温（約850℃）であるため、
加熱室１内の空気は雰囲気ガスとの燃焼によって完全に
消費され、さらに雰囲気ガスが冷却室２に流出するが、
冷却室２内の空気濃度は雰囲気ガスの燃焼範囲より十分
低くなっているため、急激な燃焼、すなわち、爆発等が
生じることがなく、冷却室エキセス７から排出されるも
のである。As a result, the temperature inside the heating chamber 1 is high (about 850 ° C),
The air in the heating chamber 1 is completely consumed by combustion with the atmospheric gas, and the atmospheric gas flows out to the cooling chamber 2.
Since the air concentration in the cooling chamber 2 is sufficiently lower than the combustion range of the atmospheric gas, the air is discharged from the cooling chamber exhaust 7 without abrupt combustion, that is, without explosion.
前記のごとく、本発明によれば、爆発の危険性なしに
ガス通しを行うことができるものである。As described above, according to the present invention, gas can be passed without danger of explosion.
以下に本発明の方法を実施する装置の一例を説明す
る。Hereinafter, an example of an apparatus for performing the method of the present invention will be described.
第１図には、雰囲気炉の一例としてバッチ炉が示され
ている。FIG. 1 shows a batch furnace as an example of the atmosphere furnace.
同図において、１は加熱室、２は冷却室であり、３は
加熱室１の入口扉、４は中間扉、4aは中間扉４に設けら
れた流出口、５は冷却室２の出口扉、６は冷却油、７は
冷却室エキセスである。In the figure, 1 is a heating room, 2 is a cooling room, 3 is an entrance door of the heating room 1, 4 is an intermediate door, 4a is an outlet provided in the intermediate door 4, 5 is an exit door of the cooling room 2. , 6 is a cooling oil and 7 is a cooling chamber exhaust.
本発明の方法の実施に当っては、前記冷却室エキセス
７は、少なくとも内部負圧時に着火し、流出空気の燃焼
を図るバーナが設けられる（実公平１−16766号参
照）。In carrying out the method of the present invention, the cooling chamber exhaust 7 is provided with a burner which ignites at least at the time of internal negative pressure and burns outflow air (see Japanese Utility Model Publication No. 1-16766).
すなわち、第２図示のごとく、本体８の上端を外方に
なだらかに弯曲及び起立させて太径部8aが構成され、該
太径部8aの内部には前記弯曲部に載置する開閉弁９が設
けられ、該開閉弁中央に吊杆10が設けられ、本体８側に
略中央部を軸支18した支持杆11の一端に前記吊杆10が軸
止めされ、他端に本体８側に設けられたソレノイド12の
プランジャ13が連結され、上記太径部8aの上方には燃焼
口14を内方としたリングバーナ15が設けられ、前記ソレ
ノイド12による開閉弁９の開放と、リングバーナ15の着
火を同期させたものである。That is, as shown in FIG. 2, a large-diameter portion 8a is formed by gently curving and rising the upper end of the main body 8 outward, and an on-off valve 9 mounted on the curved portion is provided inside the large-diameter portion 8a. A suspension rod 10 is provided at the center of the on-off valve. The suspension rod 10 is fixed to one end of a support rod 11 having a substantially central portion pivotally supported 18 on the main body 8 side, and the suspension rod 10 is mounted on the other end to the main body 8 side. The plunger 13 of the provided solenoid 12 is connected, and a ring burner 15 with the combustion port 14 inward is provided above the large diameter portion 8a. The opening of the on-off valve 9 by the solenoid 12 and the ring burner 15 Are synchronized.
図中、16は燃料ガス管路、17はパイロットバーナであ
る。In the figure, 16 is a fuel gas line, and 17 is a pilot burner.
前記構成において、本発明は、加熱室１の加熱後、中
間扉４を開いて加熱室１からの輻射熱により冷却室２内
の空気を膨張させて冷却室エキセス７から流出させ、流
出終了後、中間扉４を閉じ、輻射熱を断って冷却室２内
を負圧とするとともに、冷却室エキセス７に設けたリン
グバーナ15に着火してその燃焼排ガスにより冷却室２内
の負圧を解消し、前記工程を数回繰り返して冷却室２内
部の空気濃度を低下させた後、加熱室１に雰囲気ガスを
供給するものであり、爆発の危険性をなくすることがで
きるものである。In the above configuration, according to the present invention, after heating the heating chamber 1, the intermediate door 4 is opened, the air in the cooling chamber 2 is expanded by the radiant heat from the heating chamber 1, and flows out from the cooling chamber exhaust 7. The intermediate door 4 is closed, radiant heat is cut off to make the inside of the cooling chamber 2 a negative pressure, and the ring burner 15 provided in the cooling chamber exhaust 7 is ignited to eliminate the negative pressure in the cooling chamber 2 by the combustion exhaust gas. After reducing the air concentration inside the cooling chamber 2 by repeating the above steps several times, the atmosphere gas is supplied to the heating chamber 1, which can eliminate the danger of explosion.
本発明の方法によれば、冷却室内の空気の排除を容易
且つ有効に行うことができ、安全にガス通しを行うこと
ができるものである。According to the method of the present invention, the air in the cooling chamber can be easily and effectively eliminated, and the gas can be safely passed.
図面は本発明の方法を実施する装置の一例を示し、第１
図は雰囲気炉の縦断面図、第２図は冷却室エキセスの縦
断面図である。 １……加熱室、２……冷却室、 ３……入口扉、４……中間扉、 ５……出口扉、７……冷却室エキセス。The drawing shows an example of an apparatus for performing the method of the present invention,
FIG. 2 is a longitudinal sectional view of the atmosphere furnace, and FIG. 2 is a longitudinal sectional view of the cooling chamber exhaust. 1 ... heating room, 2 ... cooling room, 3 ... entrance door, 4 ... middle door, 5 ... exit door, 7 ... cooling room exhaust.
フロントページの続き (72)発明者 北本 健一 神奈川県横浜市港北区箕輪町２丁目６番 26号 東京熱処理工業株式会社内 (56)参考文献 実開 昭64−25700（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.6，ＤＢ名) C21D 1/74,1/76 F27D 7/06 F27B 3/10Continuing on the front page (72) Inventor Kenichi Kitamoto 2-6-26 Minowa-cho, Kohoku-ku, Yokohama-shi, Kanagawa Prefecture Inside of Tokyo Heat Treatment Industry Co., Ltd. (56) References Real Open Showa 64-25700 (JP, U) (58) Surveyed field (Int.Cl. 6 , DB name) C21D 1 / 74,1 / 76 F27D 7/06 F27B 3/10
Claims (1)
流入空気の燃焼を図るバーナを設けた雰囲気炉を使用
し、加熱室加熱後、中間扉を開いて加熱室からの輻射熱
により冷却室内の空気を膨張させて前記エキセスより流
出させる工程、流出終了後、中間扉を閉じ輻射熱を断っ
て冷却室を負圧とするとともに前記バーナに着火する工
程、前記工程を数回繰り返して冷却室内の空気を排除す
る工程、及びその後に加熱室に雰囲気ガスを供給する工
程とからなることを特徴とする雰囲気炉のガス通し方
法。1. The cooling chamber exhaust ignites at the time of internal negative pressure,
Using an atmosphere furnace provided with a burner for burning the inflow air, heating the heating chamber, opening the intermediate door, expanding the air in the cooling chamber by radiant heat from the heating chamber, and causing the air to flow out of the excess, after the flow is finished Closing the intermediate door, cutting off the radiant heat, setting the cooling chamber to a negative pressure and igniting the burner, repeating the above steps several times to remove the air in the cooling chamber, and then supplying the atmosphere gas to the heating chamber. A method for passing gas through an atmosphere furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2162199A JP2809318B2 (en) | 1990-06-20 | 1990-06-20 | Atmosphere furnace gas passing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2162199A JP2809318B2 (en) | 1990-06-20 | 1990-06-20 | Atmosphere furnace gas passing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0452212A JPH0452212A (en) | 1992-02-20 |
| JP2809318B2 true JP2809318B2 (en) | 1998-10-08 |
Family
ID=15749871
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2162199A Expired - Lifetime JP2809318B2 (en) | 1990-06-20 | 1990-06-20 | Atmosphere furnace gas passing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2809318B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8262387B2 (en) | 2005-02-03 | 2012-09-11 | Dowa Thermotech Co., Ltd. | Atmosphere heat treatment apparatus and method of operating the same |
| JP4956417B2 (en) * | 2005-02-03 | 2012-06-20 | Ｄｏｗａサーモテック株式会社 | Atmospheric heat treatment apparatus and operation method thereof |
| JP5821118B2 (en) * | 2011-09-09 | 2015-11-24 | Ｄｏｗａサーモテック株式会社 | Heat treatment method and heat treatment apparatus |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH046000Y2 (en) * | 1987-08-05 | 1992-02-19 |
-
1990
- 1990-06-20 JP JP2162199A patent/JP2809318B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0452212A (en) | 1992-02-20 |
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