JPH0452212A - Method for flowing gas into atmospheric furnace - Google Patents
Method for flowing gas into atmospheric furnaceInfo
- Publication number
- JPH0452212A JPH0452212A JP16219990A JP16219990A JPH0452212A JP H0452212 A JPH0452212 A JP H0452212A JP 16219990 A JP16219990 A JP 16219990A JP 16219990 A JP16219990 A JP 16219990A JP H0452212 A JPH0452212 A JP H0452212A
- Authority
- JP
- Japan
- Prior art keywords
- cooling chamber
- air
- chamber
- heating
- excess
- 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
- 238000000034 method Methods 0.000 title claims description 12
- 238000001816 cooling Methods 0.000 claims abstract description 56
- 238000010438 heat treatment Methods 0.000 claims abstract description 33
- 239000007789 gas Substances 0.000 abstract description 28
- 238000002485 combustion reaction Methods 0.000 abstract description 11
- 239000002912 waste gas Substances 0.000 abstract 1
- 238000004880 explosion Methods 0.000 description 8
- 235000011194 food seasoning agent Nutrition 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Landscapes
- Furnace Details (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、シーズニングに先立って、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。[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a cooling chamber (quenching chamber) prior to seasoning.
Regarding the gas passage method for eliminating air (oxygen) in the atmosphere, it is particularly suitable for supplying raw material gas such as hydrocarbon gas directly to the atmosphere furnace without using shift furnace gas. Note that the air inside the heating chamber is completely consumed by combustion with the atmospheric gas because the temperature inside the heating chamber is sufficiently high.
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。If the air remaining in the cooling chamber and the atmospheric gas in the heating chamber mix at a certain ratio and the outlet of the intermediate door becomes a source of fire, rapid combustion, or explosion, will occur, which is 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 the air in 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 heating chamber entrance door and intermediate door are closed, the cooling chamber exit door is also closed, atmospheric gas is supplied to the heating chamber, and seasoning is performed by waiting for the cooling chamber excess to catch fire. Alternatively, close the inlet door and intermediate door of the heating chamber, supply atmospheric gas to the heating chamber, and when a fire ignites at the outlet of the intermediate door, close the cooling chamber exit door and wait for a fire to start from the cooling chamber excess. Methods such as seasoning are used.
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, the source of fire is only the outlet provided in the intermediate door, so once the air in the cooling chamber is consumed to a certain extent, the combustion with the atmospheric gas that flows out is stopped, and the remaining air and the heating chamber are Atmospheric gases may mix, causing the explosion.
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１−３８８
’ＩＯ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
がなくなると、他の部分に空気が残されたまま消火され
、爆発の危険性が残される場合があった。The danger of this explosion is that in the conventional method of using converter gas, a large amount of atmospheric gas is used, so the ignition source is large, and the gas inside the cooling chamber flows, causing combustion of the air inside the cooling chamber. Although it is rare because it is carried out efficiently,
Recently, a method has been proposed, that is, a method of directly supplying raw material gas such as hydrocarbons into the furnace without using shift furnace gas (Japanese Patent Application Laid-Open No. 59-222571, Japanese Patent Publication No. 1-388).
'IO), the amount of gas used is about 1/10th of the conventional one, so when the air near the outlet of the intermediate door, which is the source of the fire, runs out, the fire is extinguished with air remaining in other parts. , there may still be a risk of explosion.
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。In view of the above circumstances, it is an object of the present invention to efficiently eliminate the air in the cooling chamber prior to seasoning, prevent explosions, and 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を負圧とするとともに前
記バーナに着火する工程、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-mentioned object, the present invention uses an atmospheric furnace equipped with a burner that ignites when the internal negative pressure is applied to the cooling chamber excess and burns the incoming air, and after heating the heating chamber, the intermediate door is opened and the heating chamber The process of expanding the air in the cooling chamber by the radiant heat from the cooling chamber and causing it to flow out from the excess, the step of closing the intermediate door to cut off the radiant heat and creating a negative pressure in the cooling chamber and igniting the burner after the flow is finished, and the step of igniting the burner after that. This method consists of a step of supplying atmospheric gas to the chamber.
通常、加熱室ｌの入口扉、中ｒＩＩＪ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 middle rIIJ door 4, the outlet door 5 of the cooling chamber 2, and the on-off valve 9 of the cooling chamber excess 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,
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, and the opening/closing valve 9 of the cooling chamber excess 7 is pushed up, causing the air in the cooling chamber 2 to flow 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 air has finished flowing out from the on-off valve 9, the intermediate door 4 is closed. As a result, the inside of the cooling chamber 2 is cut off from radiant heat from the heating chamber 1, and becomes 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, but in the present invention, the ring burner 15 is ignited at the same time as the on-off valve 9 is opened, or a little earlier than the opening of the on-off valve 9. will be held.
その結果、リングバーナ１５の燃焼排ガスが冷却室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゜Ｈ，Ｏが多く
なり、負圧が解消される。As a result, the combustion 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 Co2. N2°H,O increases and 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。By repeating the above steps several times, safety is further improved, ie, the air in the cooling chamber 2 is completely removed.
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, atmospheric gas is supplied to the heating chamber 1 after the 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 heating chamber 1 is high (approximately 850°C), so
The air in the heating chamber 1 is completely consumed by combustion with the atmospheric gas, and the atmospheric gas flows out into 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 excess 7 without rapid combustion, that is, explosion, etc.
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 through without the risk 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。 An example of an apparatus for carrying out the method of the present invention will be described below.
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 an atmospheric 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
ら九た流出口、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 chamber, 2 is a cooling chamber, 3 is an inlet door of the heating chamber 1, 4 is an intermediate door, 4a is an outlet provided in the intermediate door 4, and 5 is an outlet of the cooling chamber 2. Door, 6 is cooling oil, 7
is a cooling room excess.
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、流入空気の燃焼を
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 excess 7
is provided with a burner that is ignited at least when the internal pressure is negative to combust the incoming air (see 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大径部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シた支持杆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 the second figure, the upper end of the main body 8 is gently curved outward and raised to form a large diameter section 8a, and inside the large diameter section 8a is an on-off valve 9 placed on the curved section. A hanging rod 10 is provided at the center of the on-off valve, and a main body 8
The suspension rod 10 is fixed to one end of the support rod 11 which has a substantially central portion 18 pivoted on the side, and a plunger 13 of a solenoid 12 provided on the main body 8 side is connected to the other end. A ring burner 15 with a combustion port 14 on the inside is provided above, and the opening/closing valve 9 is opened by the solenoid 12;
The ring burners 15 are ignited in synchronization.
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 pipe, 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、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, the present invention is configured such that after the heating chamber 1 is heated, 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 the air is caused to flow out of the cooling chamber excess 7, and after the outflow is completed, The intermediate door 4 is closed, radiant heat is cut off, and the inside of the cooling chamber 2 is made to have a negative pressure, and the ring burner 15 provided in the cooling chamber excess 7 is ignited to eliminate the negative pressure inside the cooling chamber 2 with its combustion exhaust gas. After reducing the air concentration inside the cooling chamber 2, atmospheric gas is supplied to the heating chamber 1, and the risk of explosion can be eliminated.
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 removed, and gas can be passed safely.
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、５１０．出口扉、
７・・・冷却室エキセス。The drawing shows an example of an apparatus for carrying out the method of the invention, and the first
The figure is a longitudinal sectional view of the atmosphere furnace, and FIG. 2 is a longitudinal sectional view of the cooling chamber excess. 1...Heating chamber, 2...Cooling chamber, 3...
Entrance door, 4... intermediate door, 510. exit door,
7...Cooling room excellence.
Claims (1)
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、中間扉を用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を負
圧とするとともに前記バーナに着火する工程、及びその
後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。An atmospheric furnace equipped with a burner that ignites when the internal pressure is negative and burns the incoming air is used in the cooling chamber. After heating the heating chamber, the air inside the cooling chamber is expanded using radiant heat from the heating chamber using an intermediate door. a step of causing the excess to flow out from the excess;
After the end of the outflow, the intermediate door is closed to cut off the radiant heat and create a negative pressure in the cooling chamber, and the burner is ignited. After that, the atmosphere gas is supplied to the heating chamber. Threading method.
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 true JPH0452212A (en) | 1992-02-20 |
| JP2809318B2 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) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006082891A1 (en) * | 2005-02-03 | 2006-08-10 | Dowa Thermotech Co., Ltd. | Atmosphere-controlled heat treatment equipment and its operating method |
| US8262387B2 (en) | 2005-02-03 | 2012-09-11 | Dowa Thermotech Co., Ltd. | Atmosphere heat treatment apparatus and method of operating the same |
| JP2013057107A (en) * | 2011-09-09 | 2013-03-28 | Dowa Thermotech Kk | Heat treatment method and heat treatment apparatus |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6425700U (en) * | 1987-08-05 | 1989-02-13 |
-
1990
- 1990-06-20 JP JP2162199A patent/JP2809318B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6425700U (en) * | 1987-08-05 | 1989-02-13 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006082891A1 (en) * | 2005-02-03 | 2006-08-10 | Dowa Thermotech Co., Ltd. | Atmosphere-controlled heat treatment equipment and its operating method |
| US8262387B2 (en) | 2005-02-03 | 2012-09-11 | Dowa Thermotech Co., Ltd. | Atmosphere heat treatment apparatus and method of operating the same |
| JP2013057107A (en) * | 2011-09-09 | 2013-03-28 | Dowa Thermotech Kk | Heat treatment method and heat treatment apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2809318B2 (en) | 1998-10-08 |
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