JPS629179A - Method of operating direct fire type atmosphere heat treating furnace - Google Patents
Method of operating direct fire type atmosphere heat treating furnaceInfo
- Publication number
- JPS629179A JPS629179A JP14737485A JP14737485A JPS629179A JP S629179 A JPS629179 A JP S629179A JP 14737485 A JP14737485 A JP 14737485A JP 14737485 A JP14737485 A JP 14737485A JP S629179 A JPS629179 A JP S629179A
- Authority
- JP
- Japan
- Prior art keywords
- atmospheric gas
- heating chamber
- cooling chamber
- chamber
- temperature
- 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.)
- Pending
Links
Landscapes
- Tunnel Furnaces (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】 本願発明は次に述べる問題点の解決を目的とする。[Detailed description of the invention] The present invention aims to solve the following problems.
（産業上の利用分野） この発明は直火式バーナを備え
た加熱室と、冷却室とを備えて、被処理物を加熱室にお
いて加熱し、しかる後冷却室において冷却して所定の熱
処理を与えるようにしている直火式雰囲気熱処理炉に関
し、詳しくはその熱処理炉における操業方法に関する。(Industrial Application Field) This invention is equipped with a heating chamber equipped with a direct-fired burner and a cooling chamber, and the object to be treated is heated in the heating chamber, and then cooled in the cooling chamber to perform predetermined heat treatment. The present invention relates to a direct-fired atmosphere heat treatment furnace that provides heat treatment, and more particularly to a method of operating the heat treatment furnace.
（従来の技術） この種の直火式雰囲気熱処理炉は、例
えば第３図に示されるような構造のものが公知（例えば
特公昭５５−３７５７１号公報）である。この第３図に
おいて、１は加熱室で直火式バーナが備えられている。(Prior Art) This type of direct-fired atmosphere heat treatment furnace is known, for example, as shown in FIG. 3 (for example, Japanese Patent Publication No. 55-37571). In FIG. 3, reference numeral 1 denotes a heating chamber equipped with a direct burner.
２は冷却室、３は前室、４は後室、５は一端を加熱室１
に他端を冷却室２に夫々接続した雰囲気ガスの移送用ダ
クトで、その途中には雰囲気ガスを加熱室ｌから冷却室
２へ向けて移送する為の移送用ファン６が備わっている
。７は上記ダクト５に介設したクーラで、上記移送され
る雰囲気ガスを冷却して低温化させる為のものである。2 is a cooling chamber, 3 is a front chamber, 4 is a rear chamber, 5 is one end of a heating chamber 1
The other end of the duct is connected to the cooling chamber 2, and a transfer fan 6 for transferring the atmospheric gas from the heating chamber 1 to the cooling chamber 2 is provided in the middle. Reference numeral 7 denotes a cooler interposed in the duct 5, which is used to cool the atmospheric gas being transferred to lower its temperature.
このような構成の熱処理炉においては、直火式バーナの
燃焼により加熱室１内には高温の雰囲気ガスが形成され
、その雰囲気ガスの一部は移送用ダクト５を通してかつ
クーラ７による冷却により低温化されて冷却室２内に導
かれる。In the heat treatment furnace configured as described above, high-temperature atmospheric gas is formed in the heating chamber 1 by combustion in the direct-fired burner, and a portion of the atmospheric gas is passed through the transfer duct 5 and cooled by the cooler 7 to lower the temperature. and is guided into the cooling chamber 2.
この状態において被処理材８は前室３を通して加熱室１
内に導かれそこで加熱され、しかる後冷却室２に導かれ
そこで冷却され、後室４を通って送り出される。このよ
うに被処理材８が送られる過程においてその被処理材８
には所定の熱処理が与えられる。上記のような装置にお
いて、後室４を通して送り出された被処理材８の次工程
での受は入れ又は前室３への供給の滞留があると、被処
理材８が該熱処理炉に挿通されたままの状態でその移動
が停止される。即ち休転状態となる。この休転中におい
ては、加熱室１においては新しい被処理材の進入がなく
て熱負荷がなくなるため直火式バーナは燃焼を停止又は
燃焼が極めて僅かになり、雰囲気を保つ為の充分な燃焼
ガスが発生しなくなる。又この時移送用ファン６も一般
には停止される。この為加熱室ｌ及び冷却室２は炉圧が
低下し、外気が炉内に進入して炉内雰囲気が保持できな
くなる問題点がある。In this state, the material to be treated 8 passes through the front chamber 3 into the heating chamber 1.
It is then led into the cooling chamber 2 where it is cooled and then sent out through the rear chamber 4. In the process of sending the material 8 to be processed in this way, the material 8 to be processed is
is given a predetermined heat treatment. In the above-mentioned apparatus, when the material to be treated 8 sent through the rear chamber 4 is received in the next process or if the supply to the front chamber 3 is stagnant, the material to be treated 8 is inserted into the heat treatment furnace. Its movement is stopped in the same state. That is, it becomes a rest state. During this idle period, no new material to be processed enters the heating chamber 1, and there is no heat load, so the direct-fired burner stops combustion or has very little combustion, ensuring sufficient combustion to maintain the atmosphere. Gas will no longer be generated. At this time, the transfer fan 6 is also generally stopped. For this reason, there is a problem in that the furnace pressure in the heating chamber 1 and the cooling chamber 2 decreases, and outside air enters the furnace, making it impossible to maintain the atmosphere in the furnace.
この問題点を解決すべく、従来は補給用の雰囲気ガスの
供給装置１０を別途設け、その供給装置１０を供給用ダ
クト１１でもって加熱室１及び冷却室２に接続し、上記
休転中においてはバルブ１２を開くことによって供給装
置１０からの雰囲気ガスを加熱室１及び冷却室２に供給
するようにしている。しかしながらこのような構成をと
ることは極めて多額の設備費を要し、経済性が極めて悪
いという問題点がある。In order to solve this problem, conventionally, a supply device 10 for supplying atmospheric gas for replenishment is provided separately, and the supply device 10 is connected to the heating chamber 1 and the cooling chamber 2 through a supply duct 11, and during the above-mentioned rest period, By opening the valve 12, atmospheric gas from the supply device 10 is supplied to the heating chamber 1 and the cooling chamber 2. However, such a configuration requires an extremely large amount of equipment cost and is extremely uneconomical.
（発明が解決しようとする問題点） この発明は上記従
来の問題点を除き、休転中における炉内での良好な雰囲
気の保持を経済的に５行い得るようにした直火式雰囲気
熱処理炉の操業方法を提供しようとするものである。(Problems to be Solved by the Invention) This invention provides a direct-fired atmosphere heat treatment furnace that eliminates the above-mentioned conventional problems and enables economical maintenance of a good atmosphere in the furnace during shutdown. The aim is to provide a method for operating the system.
本願発明の構成は次の通りである。The configuration of the present invention is as follows.
（問題点を解決する為の手段） 本願発明は前記請求の
範囲記載の通りの手段を講じたものであってその作用は
次の通りである。(Means for Solving the Problems) The present invention takes the measures as described in the claims above, and its effects are as follows.
（作用）直火式バーナの燃焼により加熱室において高温
の雰囲気ガスが形成される。その雰囲気ガスの一部は移
送用ダクトを通しかつクーラで低温化されて冷却室に送
入される。加熱室においては高温の雰囲気ガス中で被処
理材を加熱し冷却室においては低温の雰囲気ガス中で被
処理材を冷却する。休転中においては上記戻し用ダクト
を通して低温の雰囲気ガスの一部を加熱室に戻すことに
より加熱室に熱負荷を加えて、上記直火式バーナの燃焼
による雰囲気ガスの補給が行われる。(Operation) High-temperature atmospheric gas is formed in the heating chamber by combustion in the direct-fired burner. A portion of the atmospheric gas is passed through a transfer duct, lowered in temperature by a cooler, and then sent to the cooling chamber. In the heating chamber, the material to be processed is heated in a high-temperature atmospheric gas, and in the cooling chamber, the material to be processed is cooled in a low-temperature atmospheric gas. During rest, part of the low-temperature atmospheric gas is returned to the heating chamber through the return duct, thereby applying a thermal load to the heating chamber, and replenishing the atmospheric gas through combustion in the direct-fired burner.
（実施例）以下本願の実施例を示す図面第１図について
説明する。同図中の符号で第３図と同一の符号は機能上
相互に均等構成の部分を現すものとして、その部分につ
いての詳しい説明は省略する。(Embodiment) Hereinafter, a description will be given of FIG. 1, which shows an embodiment of the present application. The same reference numerals as in FIG. 3 represent functionally equivalent parts, and a detailed explanation of these parts will be omitted.
図において、１５は移送用ダクト５と加熱室１との間に
接続した戻し用ダクト、１６．１７はバルブを夫々示す
。In the figure, 15 indicates a return duct connected between the transfer duct 5 and the heating chamber 1, and 16 and 17 indicate valves, respectively.
上記のような構成のものにあっては、炉の操業中におい
てはバルブ１６が開かれバルブ１７が閉じられて前記従
来の場合と同様に炉の操業が行われる。In the structure as described above, during operation of the furnace, the valve 16 is opened and the valve 17 is closed, and the furnace is operated in the same manner as in the conventional case.
一方体転中においては移送用ファン６及びクーラ７は運
転したままの状態でバルブ１７が適宜の開度に開かれ、
クーラ７を通って低温化された雰囲気ガスの一部が加熱
室１内に戻される。その結果、加熱室１内は熱負荷がか
かった状態となる為、加熱室１に備えられている直火式
バーナが雰囲気温度を一定に保持すべく燃焼を行う。そ
のバーナの燃焼により、雰囲気ガスが補給され、加熱室
１内は必要な炉圧が保たれる。又雰囲気ガスの一部はダ
クト５を通って冷却室２にも送られる為、冷却室２の炉
圧の低下も防止される。従って加熱室１内及び冷却室２
内に外気が侵入することは防止され、それらの内部は良
好な雰囲気状態に保たれる。On the other hand, during rotation, the transfer fan 6 and cooler 7 remain in operation, and the valve 17 is opened to an appropriate opening degree.
A portion of the atmospheric gas whose temperature has been reduced through the cooler 7 is returned into the heating chamber 1. As a result, the inside of the heating chamber 1 is subjected to a thermal load, so a direct-fired burner provided in the heating chamber 1 performs combustion to maintain the ambient temperature constant. By the combustion of the burner, atmospheric gas is replenished, and the necessary furnace pressure is maintained in the heating chamber 1. Further, since a part of the atmospheric gas is also sent to the cooling chamber 2 through the duct 5, a decrease in the furnace pressure in the cooling chamber 2 is also prevented. Therefore, inside heating chamber 1 and cooling chamber 2
Outside air is prevented from entering the interior, and a good atmospheric condition is maintained inside them.
次に本願の異なる実施例を示す図面第２図について説明
する。この図は冷却室２ｅと加熱室１ｅとの間に戻し用
ダク） １５ ｅを接続した例を示すものである。Next, FIG. 2, a drawing showing a different embodiment of the present application, will be described. This figure shows an example in which a return duct 15e is connected between the cooling chamber 2e and the heating chamber 1e.
このような構成のものにおいて炉の休転中においては、
バルブ１７ｅが開かれることにより冷却室２ｅ内の低温
の雰囲気ガスがダク） １５ ｅを通って加熱室１ｅに
戻される。その結果、前記実施例の場合と同様に加熱室
１ｅの直火式バーナが燃焼を行い雰囲気ガスの補給が行
われる。尚本例においては、ダクト１５ｅに冷却室内の
低温の雰囲気ガスを加熱室に強制的に送り込むためのフ
ァンを備えさせても良い。In such a configuration, while the furnace is idle,
By opening the valve 17e, the low-temperature atmospheric gas in the cooling chamber 2e is returned to the heating chamber 1e through the duct 15e. As a result, the direct-fired burner in the heating chamber 1e performs combustion and the atmospheric gas is replenished, as in the previous embodiment. In this example, the duct 15e may be provided with a fan for forcibly sending the low-temperature atmospheric gas within the cooling chamber into the heating chamber.
なお、機能上前図のものと同−又は均等構成と考えられ
る部分には、前回と同一の符号にアルファベントのｅを
付して重複する説明を省略した。It should be noted that parts that are functionally the same or equivalent to those in the previous figure are given the same reference numerals as in the previous figure with an alpha bent e, and redundant explanations are omitted.
（発明の効果） 以上のように本発明にあっては、炉の
操業中においては、加熱室１では直火式バーナの燃焼で
生じた高温の雰囲気ガス中で被処理材８を加熱でき、冷
却室２では上記加熱室Ｉの雰囲気ガスの一部を低温化し
て冷却室２に導き、その低温の雰囲気ガス中で冷却でき
る特長がある。(Effects of the Invention) As described above, in the present invention, during the operation of the furnace, the material to be treated 8 can be heated in the heating chamber 1 in the high-temperature atmospheric gas generated by the combustion of the direct-fired burner, The cooling chamber 2 has the advantage that a part of the atmospheric gas in the heating chamber I can be lowered in temperature, guided to the cooling chamber 2, and cooled in the low-temperature atmospheric gas.
一方炉の休転中においては低温の雰囲気ガスの一部を加
熱室１に戻すから、加熱室１に熱負荷をかけることがで
き、加熱室１の直火式バーナを燃焼させて雰囲気ガスを
補給することのできる特長がある。On the other hand, while the furnace is inactive, part of the low-temperature atmospheric gas is returned to the heating chamber 1, so a thermal load can be applied to the heating chamber 1. It has the advantage of being replenishable.
このことは、先ず第１に、炉圧を保持して外気の侵入を
防ぎ、良好な雰囲気の状態を保持できる効果があり、
第２にそのような良好な雰囲気の保持を、わずかに直火
式バーナを燃焼させるだけの少ないエネルギー消費（極
めて低額な費用）でもって実施できるから、従来の如く
高価な雰囲気ガス供給装置を別途設ける等の多額の設備
費の必要性を無くすることのできる経済性がある。Firstly, this has the effect of maintaining the furnace pressure, preventing outside air from entering, and maintaining a good atmosphere.Secondly, this has the effect of maintaining a good atmosphere by slightly reducing the direct flame. Since it can be carried out with low energy consumption (extremely low cost) just by burning a type burner, it is economical because it eliminates the need for large equipment costs such as installing a separate expensive atmospheric gas supply device as in the past. There is sex.
図面は本願の実施例を示すもので、第１図は熱処理炉の
概略図、第２図は異なる実施例を示す第１図と同様の図
である。第３図は従来の熱処理炉の概略を示す図である
。
１・・・加熱室、２・・・冷却室、５・・・移送用ダク
ト、１５・・・戻し用ダクト。
第１図
！
第２図
第３図The drawings show an embodiment of the present application, and FIG. 1 is a schematic diagram of a heat treatment furnace, and FIG. 2 is a diagram similar to FIG. 1 showing a different embodiment. FIG. 3 is a diagram schematically showing a conventional heat treatment furnace. 1... Heating chamber, 2... Cooling chamber, 5... Transfer duct, 15... Return duct. Figure 1! Figure 2 Figure 3
Claims (1)
内の雰囲気ガスを冷却室内に向けて移送する為の移送用
ダクトとを備え、上記移送用ダクトの一端は上記加熱室
に他端は上記冷却室に夫々接続すると共に、該移送用ダ
クトの途中には移送される雰囲気ガスを冷却して低温化
させる為のクーラを介設し、上記直火式バーナの燃焼に
より加熱室において高温の雰囲気ガスを形成すると共に
、その雰囲気ガスの一部を移送用ダクトを通しかつクー
ラで低温化させて冷却室に送入して、加熱室においては
高温の雰囲気ガス中で被処理材を加熱し冷却室において
は低温の雰囲気ガス中で被処理材を冷却するようにして
いる直火式雰囲気熱処理炉の操業方法において、低温の
雰囲気ガスを加熱室に戻す為の戻し用ダクトを備えると
共に、その一端は上記加熱室に、他端は上記冷却室又は
上記移送用ダクトにおける上記クーラよりも上記冷却室
の側の部分に夫々接続して、休転中においては上記戻し
用ダクトを通して低温の雰囲気ガスの一部を加熱室に戻
すことにより加熱室に熱負荷を加えて、上記直火式バー
ナの燃焼による雰囲気ガスの補給を行わせることを特徴
とする直火式雰囲気熱処理炉の操業方法。It is equipped with a heating chamber equipped with a direct-fired burner, a cooling chamber, and a transfer duct for transferring atmospheric gas in the heating chamber toward the cooling chamber, and one end of the transfer duct is connected to the heating chamber. The ends are respectively connected to the cooling chamber, and a cooler is interposed in the middle of the transfer duct to cool and lower the temperature of the atmospheric gas being transferred. A high-temperature atmospheric gas is formed, and a portion of the atmospheric gas is passed through a transfer duct, cooled to a low temperature by a cooler, and then sent to a cooling chamber. In the heating chamber, the material to be processed is heated in the high-temperature atmospheric gas. In a method of operating a direct-fired atmosphere heat treatment furnace in which a material to be treated is heated and cooled in a low-temperature atmospheric gas in a cooling chamber, a return duct is provided for returning the low-temperature atmospheric gas to the heating chamber; , one end of which is connected to the heating chamber, and the other end is connected to the cooling chamber or a portion of the transfer duct that is closer to the cooling chamber than the cooler, and during rest, low temperature is passed through the return duct. A method for operating a direct-fired atmosphere heat treatment furnace, characterized in that a heat load is applied to the heating chamber by returning a portion of the atmospheric gas to the heating chamber, and the atmospheric gas is replenished by combustion in the direct-fired burner. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14737485A JPS629179A (en) | 1985-07-04 | 1985-07-04 | Method of operating direct fire type atmosphere heat treating furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14737485A JPS629179A (en) | 1985-07-04 | 1985-07-04 | Method of operating direct fire type atmosphere heat treating furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS629179A true JPS629179A (en) | 1987-01-17 |
Family
ID=15428786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14737485A Pending JPS629179A (en) | 1985-07-04 | 1985-07-04 | Method of operating direct fire type atmosphere heat treating furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS629179A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006500545A (en) * | 2002-09-26 | 2006-01-05 | ビーティーユー インターナショナル インコーポレイテッド | Improvement of temperature distribution in convection heating furnace. |
-
1985
- 1985-07-04 JP JP14737485A patent/JPS629179A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006500545A (en) * | 2002-09-26 | 2006-01-05 | ビーティーユー インターナショナル インコーポレイテッド | Improvement of temperature distribution in convection heating furnace. |
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