JPS631191Y2 - - Google Patents
Info
- Publication number
- JPS631191Y2 JPS631191Y2 JP1029784U JP1029784U JPS631191Y2 JP S631191 Y2 JPS631191 Y2 JP S631191Y2 JP 1029784 U JP1029784 U JP 1029784U JP 1029784 U JP1029784 U JP 1029784U JP S631191 Y2 JPS631191 Y2 JP S631191Y2
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- arc furnace
- duct
- scrap
- 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.)
- Expired
Links
- 238000004064 recycling Methods 0.000 claims description 14
- 238000002485 combustion reaction Methods 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims 1
- 239000000779 smoke Substances 0.000 description 9
- 235000019645 odor Nutrition 0.000 description 8
- 239000003973 paint Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Furnace Details (AREA)
Description
【考案の詳細な説明】
本考案は、アーク炉より排出された高温度の排
ガスを利用して、該アーク炉で溶融せんとする金
属スクラツプを予熱するようにしたスクラツプ予
熱装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a scrap preheating device that uses high temperature exhaust gas discharged from an arc furnace to preheat metal scrap to be melted in the arc furnace.
従来、アーク炉の排ガス口より排出された高温
度の排ガスの全部または一部を予熱室に導いて該
アーク炉で溶融せんとする金属スクラツプを予熱
するようにしたスクラツプ予熱装置は知られてい
るが、このようなスクラツプ予熱装置では、予熱
せんとする金属スクラツプが悪質である場合その
表面に付着した油分や塗料から予熱中に悪臭や白
煙が発生し、それによる二次公害が問題となつて
いた。そして、その対策として予熱室を通過した
排ガスをアーク炉の排ガス口に戻すリサイクルダ
クトを設けて悪臭や白煙を含んだ排ガスを排ガス
口に導き、アーク炉の排熱で該排ガスを燃焼させ
る方法が採られているが、これとても、稼動直後
やスクラツプ入替時等の炉内の温度が十分上昇し
ていない時にはアーク炉から排出される排ガスの
温度が低いため、前記予熱室を通過して悪臭や白
煙を含んだ状態の排ガスがそのまま大気中に放出
される問題がなお残されていた。 Conventionally, a scrap preheating device is known in which all or part of high temperature exhaust gas discharged from the exhaust gas port of an arc furnace is guided into a preheating chamber to preheat metal scrap to be melted in the arc furnace. However, with this kind of scrap preheating equipment, if the metal scrap to be preheated is of poor quality, foul odors and white smoke will be generated during preheating from oil and paint adhering to its surface, and secondary pollution caused by this will become a problem. was. As a countermeasure, a recycling duct is installed to return the exhaust gas that has passed through the preheating chamber to the exhaust gas port of the arc furnace, and the exhaust gas containing foul odors and white smoke is guided to the exhaust gas port, and the exhaust gas is combusted using the exhaust heat of the arc furnace. However, when the temperature inside the furnace has not risen sufficiently, such as immediately after operation or when replacing scrap, the temperature of the exhaust gas discharged from the arc furnace is low, so it passes through the preheating chamber and generates a bad odor. There still remained the problem that exhaust gas containing white smoke was released directly into the atmosphere.
そこで本考案は、前記リサイクルダクト中にバ
ーナを設ける一方、アーク炉より排出される排ガ
スの温度またはフレームの有無を検出する検知器
を設け、アーク炉より排出される排ガスの温度が
低い時にはこれを検知した検知器の信号によりバ
ーナを燃焼させてリサイクルダクト中の排ガスを
該ダクト内で燃焼させるようにし、これによつ
て、金属スクラツプに付着する油分や塗料から発
生する白煙や悪臭がそのまま大気中に放出されな
いようにしたものである。 Therefore, in the present invention, a burner is provided in the recycling duct, and a detector is also provided to detect the temperature of the exhaust gas discharged from the arc furnace or the presence or absence of a flame. The signal from the detected detector causes the burner to burn and the exhaust gas in the recycling duct is combusted within the duct.This allows white smoke and bad odors generated from oil and paint adhering to metal scrap to be directly released into the atmosphere. This prevents it from being released inside.
以下に本考案の一実施例を図面と共に説明す
る。図において１は金属スクラツプS1を溶融する
アーク炉である、該アーク炉１の排ガス口２に排
気ダクト３が接続され、この排気ダクト３の他方
に燃焼室４が設置される。この燃焼室４はアーク
炉１から排出される排ガスに適宜二次空気を供給
して未燃焼ガスを燃焼させるために設けられ、こ
こで燃やされた排ガスの一部は別の排気ダクト５
を通つてバツグフイルター等の集塵装置６に送ら
れ、有害物質を除去して大気中に放出される。一
方、前記燃焼室４には排気ダクト５と別に分岐ダ
クト７が設けられ、該分岐ダクト７の一端が予熱
室８に接続される。そして予熱室８と前記排ガス
口２に通ずる排気ダクト３とをリサイクルダクト
９で連結し、該リサイクルダクト９の途中にバー
ナ１０を設ける。一方、排気ダクト３には、該排
気ダクト３とリサイクルダクト９の合流点Ａより
も排ガス口２寄りに排ガスの温度またはフレーム
の有無を検出する検知器１１が設けられており、
該検知器１１とバーナ１０とを燃焼制御回路１２
を介して接続する。 An embodiment of the present invention will be described below with reference to the drawings. In the figure, reference numeral 1 denotes an arc furnace for melting metal scrap S1.An exhaust duct 3 is connected to an exhaust gas port 2 of the arc furnace 1, and a combustion chamber 4 is installed at the other end of the exhaust duct 3. This combustion chamber 4 is provided to appropriately supply secondary air to the exhaust gas discharged from the arc furnace 1 to combust unburned gas, and a part of the exhaust gas burned here is sent to another exhaust duct 5.
The air is then sent to a dust collector 6 such as a bag filter, where harmful substances are removed and released into the atmosphere. On the other hand, a branch duct 7 is provided in the combustion chamber 4 in addition to the exhaust duct 5, and one end of the branch duct 7 is connected to a preheating chamber 8. The preheating chamber 8 and the exhaust duct 3 communicating with the exhaust gas port 2 are connected by a recycle duct 9, and a burner 10 is provided in the middle of the recycle duct 9. On the other hand, the exhaust duct 3 is provided with a detector 11 that detects the temperature of the exhaust gas or the presence or absence of a flame, closer to the exhaust gas port 2 than the confluence A of the exhaust duct 3 and the recycling duct 9.
The detector 11 and the burner 10 are connected to a combustion control circuit 12.
Connect via.
なお、図中３ａ，５ａ，７ａ，９ａは排気ダク
ト３，５，分岐ダクト７，リサイクルダクト９に
夫々設けられた流量調節用のダンパであり、ま
た、１３はリサイクルダクト９に設けられた送風
用のブロアである。 In addition, in the figure, 3a, 5a, 7a, and 9a are dampers for adjusting the flow rate provided in the exhaust ducts 3, 5, the branch duct 7, and the recycling duct 9, respectively, and 13 is the damper provided in the recycling duct 9. This is a blower for use.
このように構成したスクラツプ予熱装置ではア
ーク炉１で金属スクラツプS1を溶融する際に発生
する排ガスを排ガス口２から燃焼室４に導き、燃
焼室４を通過した排ガスの全部または一部を予熱
室８に導く。この調節はダンパ５ａ，７ａで行
う。そして予熱室８内に投入した金属スクラツプ
S2をその排ガスの温度で予熱する。このとき該金
属スクラツプS2の表面に付着した油分や塗料等か
ら悪臭および白煙が発生し、この悪臭や白煙を伴
つた排ガスは、リサイクルダクト９を通つて排気
ダクト３に導かれアーク炉１から排出される高温
度の排ガスに合流することによつてその悪臭や白
煙が燃却されるが、アーク炉１の稼動直後やスク
ラツプの入替時等では、アーク炉１から排出され
る排ガスの温度が低くリサイクルダクト９内の排
ガスを排気ダクト３中に合流させても悪臭や白煙
は燃却できない。そこでアーク炉１の排ガス口２
から排出される排ガスの温度を検知器１１により
検知し、その検出信号により所定温度（例えば
700℃程度）より低いか、または排気ダクト３内
にフレームが検知されないような場合には燃焼制
御回路１２の指令によつてバーナ１０を燃焼さ
せ、リサイクルダクト９内の排ガスをその合流前
に燃却するようにする。このようにしてリサイク
ルダクト９内でバーナ１０の火炎にさらすことで
該排ガスは脱臭され無色無臭のものに変る。 In the scrap preheating device configured in this way, the exhaust gas generated when metal scrap S 1 is melted in the arc furnace 1 is guided from the exhaust gas port 2 to the combustion chamber 4, and all or part of the exhaust gas that has passed through the combustion chamber 4 is preheated. Lead to room 8. This adjustment is performed by dampers 5a and 7a. And the metal scraps put into the preheating chamber 8
Preheat S 2 to the temperature of its exhaust gas. At this time, a foul odor and white smoke are generated from the oil, paint, etc. adhering to the surface of the metal scrap S2 , and the exhaust gas accompanied by this foul odor and white smoke is led to the exhaust duct 3 through the recycling duct 9, and is led to the arc furnace. The foul odor and white smoke are incinerated by joining the high-temperature exhaust gas discharged from the arc furnace 1, but immediately after the arc furnace 1 starts operating, or when the scrap is replaced, Even if the exhaust gas in the recycling duct 9 is merged into the exhaust duct 3 due to the low temperature, the foul odor and white smoke cannot be burned. Therefore, the exhaust gas port 2 of the arc furnace 1
The detector 11 detects the temperature of the exhaust gas discharged from the
If the temperature is lower than 700°C (approx. Try to avoid it. By exposing the exhaust gas to the flame of the burner 10 in the recycling duct 9 in this manner, the exhaust gas is deodorized and becomes colorless and odorless.
なおアーク炉１内の温度が上昇し、検出器１１
を通じて燃焼制御回路１２に伝えられる排ガスの
温度が所定値に達するとバーナ１０の燃焼は止め
られ、そのときはリサイクルダクト９内の白煙、
悪臭を含んだ排ガスは、アーク炉１から排出され
る高温度の排ガスと混合して燃焼室４中で燃焼さ
れるようになる。 Note that as the temperature inside the arc furnace 1 rises, the detector 11
When the temperature of the exhaust gas transmitted to the combustion control circuit 12 through the burner 10 reaches a predetermined value, combustion of the burner 10 is stopped, and at that time, white smoke in the recycling duct 9,
The foul-smelling exhaust gas mixes with the high-temperature exhaust gas discharged from the arc furnace 1 and is combusted in the combustion chamber 4.
なおこの実施例ではバーナ１０をオンオフ制御
するように説明したが、バーナ１０の燃焼量を排
ガス温度等に従い無段階または有段的に制御する
ようにしてもよい。 In this embodiment, the burner 10 is controlled on and off, but the combustion amount of the burner 10 may be controlled steplessly or in stages according to the exhaust gas temperature and the like.
以上実施例について説明したように、本考案の
スクラツプ予熱装置はアーク炉より排出される排
ガスの温度またはフレームの有無によつてリサイ
クルダクト中のバーナを燃焼させるようにしたの
で、悪臭，大気汚染等のスクラツプ予熱による二
次公害の発生をアーク炉の稼動状況に拘らず確実
に防止できる有益なものである。 As explained above in the embodiments, the scrap preheating device of the present invention burns the burner in the recycling duct depending on the temperature of the exhaust gas discharged from the arc furnace or the presence or absence of a flame. This is advantageous in that it can reliably prevent the occurrence of secondary pollution due to scrap preheating regardless of the operating status of the arc furnace.
図は本考案の一実施例を示したスクラツプ予熱
装置の配管系統図である。
１……アーク炉、２……排ガス口、８……予熱
室、Ｓ２……金属スクラツプ、９……リサイクル
ダクト、１０……バーナ、１１……検知器。
The figure is a piping system diagram of a scrap preheating device showing an embodiment of the present invention. 1... Arc furnace, 2... Exhaust gas port, 8... Preheating chamber, S2... Metal scrap, 9... Recycling duct, 10... Burner, 11... Detector.
Claims (1)
ガスの全部または一部を予熱室に導いて該アーク
炉で溶融せんとする金属スクラツプを予熱するよ
うにしたスクラツプ予熱装置において、予熱室を
通過した排ガスを前記アーク炉の排ガス口に戻す
リサイクルダクトを設け、アーク炉より排出され
る排ガスの温度またはフレームの有無を検出する
検知器を設けると共に、その検知信号により燃焼
が制御されるバーナを前記リサイクルダクトの途
中に設けてなることを特徴としたスクラツプ予熱
装置。 In a scrap preheating device, all or part of the high temperature exhaust gas discharged from the exhaust gas port of the arc furnace is guided to the preheating chamber to preheat the metal scrap to be melted in the arc furnace. A recycling duct is provided to return the exhaust gas to the exhaust gas port of the arc furnace, and a detector is provided to detect the temperature of the exhaust gas discharged from the arc furnace or the presence or absence of a flame, and the burner whose combustion is controlled by the detection signal is installed in the recycling duct. A scrap preheating device characterized by being installed in the middle of a duct.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1029784U JPS60123598U (en) | 1984-01-27 | 1984-01-27 | Scrap preheating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1029784U JPS60123598U (en) | 1984-01-27 | 1984-01-27 | Scrap preheating device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60123598U JPS60123598U (en) | 1985-08-20 |
| JPS631191Y2 true JPS631191Y2 (en) | 1988-01-12 |
Family
ID=30491349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1029784U Granted JPS60123598U (en) | 1984-01-27 | 1984-01-27 | Scrap preheating device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60123598U (en) |
-
1984
- 1984-01-27 JP JP1029784U patent/JPS60123598U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60123598U (en) | 1985-08-20 |
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