JPH11237191A - Device for treating exhaust gas from furnace-top preheating device - Google Patents
Device for treating exhaust gas from furnace-top preheating deviceInfo
- Publication number
- JPH11237191A JPH11237191A JP10055896A JP5589698A JPH11237191A JP H11237191 A JPH11237191 A JP H11237191A JP 10055896 A JP10055896 A JP 10055896A JP 5589698 A JP5589698 A JP 5589698A JP H11237191 A JPH11237191 A JP H11237191A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- tower
- preheating device
- buffer
- preheating
- 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
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Incineration Of Waste (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Furnace Details (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は炉頂予熱装置から排
出される排ガスの処理装置に関する。バーナ炉やアーク
炉等の溶解炉で金属スクラップを溶解する場合、原料で
ある金属スクラップを溶解炉から発生する高温の排ガス
で予熱することが行なわれる。金属スクラップの予熱に
は各種の装置が使用されるが、そのうちの一つに炉頂予
熱装置がある。この炉頂予熱装置は、溶解炉の炉頂に装
備されたシャフト内に開閉可能なフィンガ（フォーク）
で一つ又は上下方向に二つ以上の予熱室が仕切られたも
ので、該予熱室へ装填した金属スクラップを溶解炉から
発生する高温の排ガスで予熱するようになっている。本
発明はかかる炉頂予熱装置から排出される排ガスの処理
装置に関する。The present invention relates to an apparatus for treating exhaust gas discharged from a furnace top preheating apparatus. When melting metal scrap in a melting furnace such as a burner furnace or an arc furnace, the metal scrap as a raw material is preheated with high-temperature exhaust gas generated from the melting furnace. Various devices are used for preheating metal scrap, and one of them is a furnace top preheating device. This furnace top preheating device is a finger (fork) that can be opened and closed in a shaft mounted on the furnace top of the melting furnace.
One or two or more preheating chambers are partitioned in the vertical direction, and the metal scrap loaded in the preheating chamber is preheated by high-temperature exhaust gas generated from a melting furnace. The present invention relates to a device for treating exhaust gas discharged from such a furnace top preheating device.
【０００２】[0002]
【従来の技術】従来、上記のような炉頂予熱装置とし
て、予熱室に装填されている金属スクラップを予熱した
後の排ガスを、最上段の予熱室を形成するシャフト壁上
部に接続された排ガスダクトから吸引排気するものや、
最上段以外の予熱室を形成するシャフト壁上部に接続さ
れた排ガスダクトから吸引排気するものがある。例え
ば、炉頂装備のシャフト内に開閉可能なフィンガで一つ
の予熱室が仕切られており、該予熱室を形成するシャフ
ト壁上部に排ガスダクトが接続されているものがある
が、この炉頂予熱装置では、溶解炉から発生する高温の
排ガスを予熱室へ導入し、該予熱室に装填されている金
属スクラップを予熱して、予熱後の排ガスを該予熱室か
ら排ガスダクトを介して吸引排気するようになってい
る。また例えば、炉頂装備のシャフト内に開閉可能なフ
ィンガで上下方向に２段の予熱室が仕切られており、上
段の予熱室を形成するシャフト壁上部と下段の予熱室よ
りも下部のシャフト壁との間にバイパスダクトが渡され
ていて、下段の予熱室を形成するシャフト壁上部に排ガ
スダクトが接続されているものがあるが（特開平８−５
４１９１、特開平８−１３６１６３、特開平９−２５７
３７７）、この炉頂予熱装置では、溶解炉から発生する
高温の排ガスの一部を下段の予熱室へ導入し、該下段の
予熱室に装填されている金属スクラップを予熱する一
方、溶解炉から発生する高温の排ガスの残部をバイパス
ダクトを介して上段の予熱室へ導入し、該上段の予熱室
に装填されている金属スクラップを予熱して、これらの
予熱後の排ガスを下段の予熱室から排ガスダクトを介し
て吸引排気するようになっている。2. Description of the Related Art Conventionally, as a furnace top preheating apparatus as described above, an exhaust gas after preheating a metal scrap loaded in a preheating chamber is discharged to an upper portion of a shaft wall forming an uppermost preheating chamber. Things that suck and exhaust from the duct,
There is one that sucks and exhausts gas from an exhaust gas duct connected to the upper part of a shaft wall that forms a preheating chamber other than the top stage. For example, one preheating chamber is partitioned by a finger that can be opened and closed in a shaft equipped with a furnace top, and an exhaust gas duct is connected to an upper portion of a shaft wall that forms the preheating chamber. In the apparatus, high-temperature exhaust gas generated from the melting furnace is introduced into a preheating chamber, metal scrap loaded in the preheating chamber is preheated, and the exhaust gas after preheating is sucked and exhausted from the preheating chamber via an exhaust gas duct. It has become. Further, for example, two stages of preheating chambers are vertically divided by fingers that can be opened and closed in a shaft equipped with a furnace top, and an upper part of a shaft wall forming an upper preheating chamber and a lower part of a shaft wall below a lower preheating chamber (See Japanese Patent Application Laid-Open No. 8-5).
4191, JP-A-8-136163, JP-A-9-257
377) In this furnace top preheating device, a part of the high-temperature exhaust gas generated from the melting furnace is introduced into the lower preheating chamber, and the metal scrap loaded in the lower preheating chamber is preheated. The remainder of the generated high-temperature exhaust gas is introduced into the upper preheating chamber via a bypass duct, the metal scrap loaded in the upper preheating chamber is preheated, and the exhaust gas after these preheating is discharged from the lower preheating chamber. Suction and exhaust are performed through an exhaust gas duct.
【０００３】そして従来は、上記のように排ガスダクト
を介して吸引排気する予熱後の排ガスの処理装置とし
て、該排ガスダクトの下流側に脱臭塔やクーラを介して
集塵装置が接続されたものが使用されている。ところ
が、かかる従来の排ガス処理装置には、最上段の予熱室
へ金属スクラップを投入するときに、或は上段の予熱室
で予熱した金属スクラップを下段の予熱室へ落下すると
きに、金属スクラップの小片が排ガスダクトへ吸い込ま
れ、吸い込まれた金属スクラップの小片が下流側の排ガ
スダクト内に堆積したり、脱臭塔やクーラ更には集塵装
置へと持ち込まれて、排ガスの円滑な流れに支障をきた
し、脱臭塔やクーラ更には集塵装置の機能を損なうとい
う問題がある。Conventionally, as a treatment device for preheated exhaust gas which is sucked and exhausted through an exhaust gas duct as described above, a dust collector is connected downstream of the exhaust gas duct via a deodorization tower or a cooler. Is used. However, in such a conventional exhaust gas treatment apparatus, when metal scrap is put into the uppermost preheating chamber, or when the metal scrap preheated in the upper preheating chamber falls into the lower preheating chamber, The small pieces are sucked into the exhaust gas duct, and the small pieces of the sucked-in metal scrap are deposited in the exhaust gas duct on the downstream side, or are taken into the deodorization tower, cooler, and even the dust collector, which hinders the smooth flow of the exhaust gas. However, there is a problem that the function of the deodorization tower, the cooler and the function of the dust collector are impaired.
【０００４】[0004]
【発明が解決しようとする課題】本発明が解決しようと
する課題は、従来の炉頂予熱装置から排出される排ガス
の処理装置には、被予熱物である金属スクラップの小片
が炉頂予熱装置のシャフト壁に接続された排ガスダクト
へ吸い込まれ、吸い込まれた金属スクラップの小片が下
流側の排ガスダクト内に堆積したり、脱臭塔やクーラ更
には集塵装置へと持ち込まれて、排ガスの円滑な流れに
支障をきたし、脱臭塔やクーラ更には集塵装置の機能を
損なう点である。SUMMARY OF THE INVENTION The problem to be solved by the present invention is that a conventional apparatus for treating exhaust gas discharged from a furnace top preheating apparatus includes a small piece of metal scrap to be preheated. The metal scrap is sucked into the exhaust gas duct connected to the shaft wall, and small pieces of the sucked metal are deposited in the exhaust gas duct on the downstream side, taken into the deodorization tower, cooler, and further to the dust collector, and the exhaust gas is smoothed. This impedes the proper flow and impairs the functions of the deodorization tower, cooler and dust collector.
【０００５】[0005]
【課題を解決するための手段】上記の課題を解決する本
発明は、溶解炉の炉頂に装備された予熱装置から排出さ
れる排ガスの処理装置であって、予熱装置の排ガスダク
トに緩衝塔が接続されており、該緩衝塔が、密閉系の塔
と、該塔の下部に設けられた排ガス入口と、該塔の上部
に設けられた排ガス出口と、該塔に取り付けられたバー
ナとを備えていて、該緩衝塔で、予熱装置から排出され
る排ガスに同伴する金属スクラップの小片を捕捉すると
共に、予熱装置から排出される排ガスに含まれる一酸化
炭素を燃焼するようにして成ることを特徴とする排ガス
の処理装置に係る。また本発明は、溶解炉の炉頂に装備
された予熱装置から排出される排ガスの処理装置であっ
て、予熱装置の排ガスダクトに緩衝塔が接続されてお
り、該緩衝塔が、密閉系の塔と、該塔内にＵ字形流路を
形成する中仕切りと、該Ｕ字形流路上流側の該塔上部に
設けられた排ガス入口と、該Ｕ字形流路下流側の該塔上
部に設けられた排ガス出口と、該塔に取り付けられたバ
ーナとを備えていて、該緩衝塔で、予熱装置から排出さ
れる排ガスに同伴する金属スクラップの小片を捕捉する
と共に、予熱装置から排出される排ガスに含まれる一酸
化炭素を燃焼するようにして成ることを特徴とする排ガ
スの処理装置に係る。SUMMARY OF THE INVENTION The present invention, which solves the above-mentioned problems, is an apparatus for treating exhaust gas discharged from a preheating device mounted on the furnace top of a melting furnace, wherein a buffer tower is provided in an exhaust gas duct of the preheating device. Are connected, the buffer tower comprises a closed system tower, an exhaust gas inlet provided at the lower part of the tower, an exhaust gas outlet provided at the upper part of the tower, and a burner attached to the tower. The buffer tower captures small pieces of metal scrap accompanying the exhaust gas discharged from the preheating device, and burns carbon monoxide contained in the exhaust gas discharged from the preheating device. The present invention relates to a characteristic exhaust gas treatment device. Further, the present invention is a treatment device for exhaust gas discharged from a preheating device mounted on the furnace top of a melting furnace, wherein a buffer tower is connected to an exhaust gas duct of the preheating device, and the buffer tower is a closed system. A tower, a partition forming a U-shaped flow path in the tower, an exhaust gas inlet provided in the upper part of the tower on the upstream side of the U-shaped flow path, and an exhaust gas inlet provided in the upper part of the tower on the downstream side of the U-shaped flow path Exhaust gas outlet, and a burner attached to the tower, the buffer tower captures small pieces of metal scrap accompanying the exhaust gas discharged from the preheating device, and the exhaust gas discharged from the preheating device. The present invention relates to an exhaust gas treatment apparatus characterized in that carbon monoxide contained in a gas is burned.
【０００６】本発明に係る排ガスの処理装置では、溶解
炉の炉頂に装備された予熱装置の排ガスダクトに、好ま
しくは該予熱装置の近くに、緩衝塔が接続されている。
緩衝塔は、密閉系の塔と、該塔に設けられた排ガス入口
及び排ガス出口と、該塔に取り付けられたバーナとを備
えている。排ガス入口は塔の下部又は上部に設けられて
おり、排ガス出口は塔の上部に設けられていて、バーナ
は一つ又は二つ以上が塔内へ導入された排ガスと該バー
ナの火炎とが充分接触するように取り付けられている。[0006] In the exhaust gas treatment apparatus according to the present invention, a buffer tower is connected to an exhaust gas duct of a preheating device mounted on the furnace top of the melting furnace, preferably near the preheating device.
The buffer tower includes a closed system tower, an exhaust gas inlet and an exhaust gas outlet provided in the tower, and a burner attached to the tower. The exhaust gas inlet is provided at the lower or upper part of the tower, the exhaust gas outlet is provided at the upper part of the tower, and one or more of the burners are sufficient for the exhaust gas introduced into the tower and the flame of the burner. It is attached so as to make contact.
【０００７】排ガス入口を塔の下部に設ける場合、該排
ガス入口から塔内へ導入した排ガスが該塔内を上昇して
該塔の上部に設けた排ガス出口から排気されるまでの間
に、該塔内で、該排ガスに同伴する金属スクラップの小
片を自重により捕捉し、また該排ガスに含まれる一酸化
炭素をバーナの火炎で燃焼する。排ガス入口を塔の上部
に設ける場合、該塔内にＵ字形流路を形成する中仕切り
を取り付け、該Ｕ字形流路上流側の該塔上部に排ガス入
口を、また該Ｕ字形流路下流側の該塔上部に排ガス出口
を設けて、該排ガス入口から塔内へ導入した排ガスが該
Ｕ字形流路上流側を下降し、該Ｕ字形流路下流側を上昇
して該排ガス出口から排気されるまでの間に、該排ガス
に同伴する金属スクラップの小片を自重により捕捉し、
また該排ガスに含まれる一酸化炭素をバーナの火炎で燃
焼する。When the exhaust gas inlet is provided at the lower part of the tower, the exhaust gas introduced into the tower from the exhaust gas inlet rises in the tower and is exhausted from the exhaust gas outlet provided at the upper part of the tower. In the tower, a small piece of metal scrap accompanying the exhaust gas is captured by its own weight, and carbon monoxide contained in the exhaust gas is burned by a burner flame. When the exhaust gas inlet is provided at the upper part of the tower, a partition forming a U-shaped flow path is installed in the tower, and an exhaust gas inlet is provided at the upper part of the tower on the upstream side of the U-shaped flow path, and the downstream side of the U-shaped flow path. An exhaust gas outlet is provided at the top of the tower, and exhaust gas introduced into the tower from the exhaust gas inlet descends on the upstream side of the U-shaped flow path, rises on the downstream side of the U-shaped flow path, and is exhausted from the exhaust gas outlet. In the meantime, small pieces of metal scrap accompanying the exhaust gas are captured by their own weight,
Further, carbon monoxide contained in the exhaust gas is burned by the flame of the burner.
【０００８】したがって本発明に係る排ガスの処理装置
によると、炉頂予熱装置の排ガスダクトへ金属スクラッ
プの小片が吸い込まれても、かかる金属スクラップの小
片が下流側の排ガスダクト内に堆積したり或は脱臭塔や
クーラ更には集塵装置へと持ち込まれることはなく、排
ガスの円滑な流れを維持でき、また脱臭塔やクーラ更に
は集塵装置の機能を維持できる。加えて本発明に係る排
ガスの処理装置によると、緩衝塔に取り付けたバーナの
火炎で排ガスに含まれる一酸化炭素を燃焼でき、また臭
気成分や油分をも燃焼分解できる。Therefore, according to the exhaust gas treating apparatus of the present invention, even if small pieces of metal scrap are sucked into the exhaust gas duct of the furnace top preheating device, such small pieces of metal scrap may accumulate in the exhaust gas duct on the downstream side. Is not carried into the deodorizing tower, cooler and further the dust collecting device, the smooth flow of the exhaust gas can be maintained, and the function of the deodorizing tower, cooler and further the dust collecting device can be maintained. In addition, according to the exhaust gas treatment apparatus of the present invention, carbon monoxide contained in the exhaust gas can be burned by the flame of the burner attached to the buffer tower, and the odor component and oil can also be burned and decomposed.
【０００９】[0009]
【発明の実施の形態】図１は本発明に係る排ガスの処理
装置を一部縦断面で略示する全体図である。溶解炉１１
の炉頂に予熱装置２１が装備されており、予熱装置２１
の排ガスダクト４１に緩衝塔５１が接続されている。緩
衝塔５１の下流側には排ガスダクト４２を介してクーラ
７１が接続されており、クーラ７１の更に下流側に排ガ
スダクト４３及び吸引ブロワ４４を介して集塵装置８１
が接続されている。FIG. 1 is an overall view schematically showing an exhaust gas treatment apparatus according to the present invention in a partial longitudinal section. Melting furnace 11
Is equipped with a preheating device 21 at the top of the furnace.
A buffer tower 51 is connected to the exhaust gas duct 41. A cooler 71 is connected to the downstream side of the buffer tower 51 via an exhaust gas duct 42, and a dust collector 81 is provided further downstream of the cooler 71 via an exhaust gas duct 43 and a suction blower 44.
Is connected.
【００１０】予熱装置２１は天部に開閉扉２２を有する
密閉系のシャフト２３で構築されている。シャフト２３
内には開閉可能なフィンガ２４，２５で上下方向に２段
の予熱室２６，２７が仕切られており、上段の予熱室２
６を形成するシャフト壁上部と下段の予熱室２７よりも
下部のシャフト壁との間にバイパスダクト２８が渡され
ていて、下段の予熱室２７を形成するシャフト壁上部に
排ガスダクト４１が接続されている。The preheating device 21 is constructed by a closed shaft 23 having an opening / closing door 22 at the top. Shaft 23
Inside, two-stage preheating chambers 26 and 27 are vertically divided by fingers 24 and 25 that can be opened and closed.
A bypass duct 28 is provided between the upper part of the shaft wall forming the lower preheating chamber 27 and the lower part of the preheating chamber 27, and the exhaust gas duct 41 is connected to the upper part of the shaft wall forming the lower preheating chamber 27. ing.
【００１１】緩衝塔５１は、密閉系の塔５２と、塔５２
の側壁下部に設けられた排ガス入口５３と、排ガス入口
５３の反対側に位置する塔５２の側壁下部に取り付けら
れたバーナ５４と、バーナ５４の反対側に位置する塔５
２の側壁中部に取り付けられたバーナ５５と、バーナ５
５の反対側に位置する塔５２の側壁上部に設けられた排
ガス出口５６と、塔５２の底部に取り付けられた開閉扉
５７とを備えている。排ガス入口５３には排ガスダクト
４１が斜め下向きに接続されており、排ガス出口５６に
は排ガスダクト４２が接続されている。予熱装置２１か
ら排出される排ガスは排ガスダクト４１を介して排ガス
入口５３から塔５２内へ斜め下向きに底部へ向かって導
入されるようになっており、またバーナ５４，５５はこ
れらの火炎が塔５２内における排ガスの流れとあたかも
対向し或はその流れを遮るかの如く塔５２の側壁に斜め
下向きに取り付けられている。The buffer tower 51 includes a closed tower 52 and a tower 52.
Exhaust gas inlet 53 provided at the lower part of the side wall of the gas turbine, a burner 54 attached to the lower part of the side wall of the tower 52 located at the opposite side of the exhaust gas inlet 53, and the tower 5 located at the opposite side of the burner 54.
A burner 55 attached to the center of the side wall of the burner 5;
An exhaust gas outlet 56 is provided at the upper part of the side wall of the tower 52 located on the opposite side of the tower 5 and an opening / closing door 57 attached to the bottom of the tower 52. The exhaust gas inlet 53 is connected to the exhaust gas duct 41 obliquely downward, and the exhaust gas outlet 56 is connected to the exhaust gas duct 42. Exhaust gas discharged from the preheating device 21 is introduced through an exhaust gas duct 41 from an exhaust gas inlet 53 into the tower 52 obliquely downward and toward the bottom. It is mounted obliquely downward on the side wall of the tower 52 as if facing or blocking the flow of the exhaust gas in 52.
【００１２】予熱装置２１において、上段の予熱室２６
で予熱した金属スクラップを下段の予熱室２７へ落下さ
せるときに、金属スクラップの小片が排ガスダクト４１
へ吸い込まれるが、排ガス入口５３から塔５２内へ導入
した排ガスが塔５２内を上昇して排ガス出口５６から排
気されるまでの間に、塔５２内で、該排ガスに同伴する
金属スクラップの小片を自重により捕捉して底部に溜
め、また該排ガスに含まれる一酸化炭素をバーナ５４，
５５の火炎で燃焼し、併せて該排ガスに含まれる臭気成
分や油分をバーナ５４，５５の火炎で燃焼分解する。か
くして金属スクラップの小片を捕捉し、一酸化炭素を燃
焼して、更に臭気成分や油分を燃焼分解した後、排ガス
を下流側のクーラ７１で冷却してから、最後に集塵装置
８１で該排ガスに含まれる塵埃等を除去する。In the preheating device 21, the upper preheating chamber 26
When the metal scrap preheated in the step is dropped into the lower preheating chamber 27, small pieces of the metal scrap
While the exhaust gas introduced from the exhaust gas inlet 53 into the tower 52 rises in the tower 52 and is exhausted from the exhaust gas outlet 56, small pieces of metal scrap accompanying the exhaust gas are formed in the tower 52. Is captured by its own weight and accumulated at the bottom, and carbon monoxide contained in the exhaust gas is burned by a burner 54,
The fuel is burned by the flame 55 and the odor components and oil contained in the exhaust gas are also burned and decomposed by the flames of the burners 54 and 55. Thus, small pieces of metal scrap are captured, carbon monoxide is burned, and further odor components and oil components are burned and decomposed. After that, the exhaust gas is cooled by a cooler 71 on the downstream side, and finally the exhaust gas is collected by a dust collector 81. To remove dust and the like contained in.
【００１３】図２は本発明に係る他の排ガスの処理装置
を一部縦断面で略示する全体図である。溶解炉１２の炉
頂に予熱装置３１が装備されており、予熱装置３１の排
ガスダクト４５に緩衝塔６１が接続されている。緩衝塔
６１の下流側には排ガスダクト４６を介してクーラ７２
が接続されており、クーラ７２の更に下流側に排ガスダ
クト４７及び吸引ブロワ４８を介して集塵装置８２が接
続されている。FIG. 2 is an overall view schematically showing a partial cross section of another exhaust gas treatment apparatus according to the present invention. A preheating device 31 is provided on the furnace top of the melting furnace 12, and a buffer tower 61 is connected to an exhaust gas duct 45 of the preheating device 31. A cooler 72 is provided downstream of the buffer tower 61 via an exhaust gas duct 46.
And a dust collecting device 82 is connected to the downstream side of the cooler 72 via an exhaust gas duct 47 and a suction blower 48.
【００１４】予熱装置３１を構成する開閉扉３２、密閉
系のシャフト３３、フィンガ３４，３５、上下２段の予
熱室３６，３７及びバイパスダクト３８の相互関係は、
図１に略示した予熱装置２１の場合と同様になってい
る。The reciprocal relationship between the opening / closing door 32, the closed shaft 33, the fingers 34, 35, the upper and lower two-stage preheating chambers 36, 37 and the bypass duct 38 constituting the preheating device 31 is as follows.
This is the same as the case of the preheating device 21 schematically shown in FIG.
【００１５】緩衝塔６１は、密閉系の塔６２と、塔６２
内にＵ字形流路６３を形成する中仕切り６４と、Ｕ字形
流路６３の上流側における塔６２の側壁上部に設けられ
た排ガス入口６５と、Ｕ字形流路６３の下流側における
塔６２の側壁上部に設けられた排ガス出口６６と、Ｕ字
形流路６３の上流側における塔６２の側壁下部に取り付
けられたバーナ６７と、Ｕ字形流路６３の下流側におけ
る塔６２の側壁中部に取り付けられたバーナ６８と、塔
６２の底部に取り付けられた開閉扉６９とを備えてい
る。排ガス入口６５には排ガスダクト４５が接続されて
おり、排ガス出口６６には排ガスダクト４６が接続され
ていて、バーナ６７，６８はこれらの火炎が塔６２内の
Ｕ字形流路６３における排ガスの流れを遮るかの如く塔
６２の側壁に斜め下向きに取り付けられている。The buffer tower 61 includes a closed tower 62 and a tower 62.
A partition 64 forming a U-shaped channel 63 therein, an exhaust gas inlet 65 provided on the upper side wall of the tower 62 on the upstream side of the U-shaped channel 63, and a tower 62 on the downstream side of the U-shaped channel 63. An exhaust gas outlet 66 provided at the upper part of the side wall, a burner 67 attached to the lower part of the side wall of the tower 62 on the upstream side of the U-shaped flow path 63, and a burner 67 attached to the middle part of the side wall of the tower 62 at the downstream side of the U-shaped flow path 63 And a door 69 attached to the bottom of the tower 62. An exhaust gas duct 45 is connected to the exhaust gas inlet 65, and an exhaust gas duct 46 is connected to the exhaust gas outlet 66. The burners 67 and 68 cause the flow of the exhaust gas in the U-shaped channel 63 in the tower 62. It is attached obliquely downward on the side wall of the tower 62 so as to block the air.
【００１６】予熱装置３１において、上段の予熱室３６
で予熱した金属スクラップを下段の予熱室３７へ落下さ
せるときに、金属スクラップの小片が排ガスダクト４５
へ吸い込まれるが、排ガス入口６５から塔６２内へ導入
した排ガスがＵ字形流路６３の上流側を下降し、Ｕ字形
流路６３の下流側を上昇して排ガス出口６６から排気さ
れるまでの間に、塔６２内で、該排ガスに同伴する金属
スクラップの小片を自重により捕捉して底部に溜め、ま
た該排ガスに含まれる一酸化炭素をバーナ６７，６８の
火炎で燃焼し、併せて該排ガスに含まれる臭気成分や油
分をバーナ６７，６８の火炎で燃焼分解する。かくして
金属スクラップの小片を捕捉し、一酸化炭素を燃焼し
て、更に臭気成分や油分を燃焼分解した後、排ガスを下
流側のクーラ７２で冷却してから、最後に集塵装置８２
で該排ガスに含まれる塵埃等を除去する。In the preheating device 31, an upper preheating chamber 36 is provided.
When the metal scrap preheated in the step is dropped into the lower preheating chamber 37, small pieces of the metal scrap
The exhaust gas introduced into the tower 62 from the exhaust gas inlet 65 descends on the upstream side of the U-shaped channel 63, rises on the downstream side of the U-shaped channel 63, and is exhausted from the exhaust gas outlet 66. In the meantime, in the tower 62, small pieces of metal scrap accompanying the exhaust gas are captured by their own weight and stored at the bottom, and carbon monoxide contained in the exhaust gas is burned by the flames of the burners 67 and 68. The odor components and oil contained in the exhaust gas are burned and decomposed by the flames of the burners 67 and 68. Thus, small pieces of metal scrap are captured, carbon monoxide is burned, and odor components and oils are further decomposed by combustion. After that, the exhaust gas is cooled by the cooler 72 on the downstream side, and finally the dust collector 82
This removes dust and the like contained in the exhaust gas.
【００１７】[0017]
【発明の効果】既に明らかなように、以上説明した本発
明には、炉頂予熱装置の排ガスダクトへ金属スクラップ
の小片が吸い込まれても、かかる金属スクラップの小片
が下流側の排ガスダクト内に堆積したり或は脱臭塔やク
ーラ更には集塵装置へと持ち込まれることはないので、
排ガスの円滑な流れを維持でき、また脱臭塔やクーラ更
には集塵装置の機能を維持できる。加えて本発明に係る
排ガスの処理装置によると、緩衝塔に取り付けたバーナ
の火炎で排ガスに含まれる一酸化炭素を燃焼でき、また
臭気成分や油分をも燃焼分解できる。As is apparent from the above, according to the present invention described above, even if a small piece of metal scrap is sucked into the exhaust gas duct of the furnace top preheating device, the small piece of metal scrap remains in the exhaust gas duct on the downstream side. It will not accumulate or be carried into deodorizing towers, coolers or dust collectors,
The smooth flow of exhaust gas can be maintained, and the functions of the deodorization tower, cooler, and dust collector can be maintained. In addition, according to the exhaust gas treatment apparatus of the present invention, carbon monoxide contained in the exhaust gas can be burned by the flame of the burner attached to the buffer tower, and the odor component and oil can also be burned and decomposed.
【図１】本発明に係る排ガスの処理装置を一部縦断面で
略示する全体図。FIG. 1 is an overall view schematically showing a flue gas treatment apparatus according to the present invention in a partial longitudinal section.
【図２】本発明に係る他の排ガスの処理装置を一部縦断
面で略示する全体図。FIG. 2 is an overall view schematically showing a partial longitudinal section of another exhaust gas treatment apparatus according to the present invention.
１１，１２・・・溶解炉、２１，３１・・・予熱装置、
４１〜４３，４５〜４７・・・排ガスダクト、５１，６
１・・・緩衝塔、５２，６２・・・塔、５３，６５・・
・排ガス入口、５４，５５，６７，６８・・・バーナ、
５６，６６・・・排ガス出口、５７，６９・・・開閉
扉、６３・・・Ｕ字形流路、６４・・・中仕切り、７
１，７２・・・クーラ、８１，８２・・・集塵装置11, 12 ... melting furnace, 21, 31 ... preheating device,
41 to 43, 45 to 47 ... exhaust gas duct, 51, 6
1 ... buffer tower, 52, 62 ... tower, 53, 65 ...
・ Exhaust gas inlet, 54, 55, 67, 68 ... burner
56, 66: exhaust gas outlet, 57, 69: door, 63: U-shaped channel, 64: partition, 7
1, 72 ... cooler, 81, 82 ... dust collector
Claims (2)
排出される排ガスの処理装置であって、予熱装置の排ガ
スダクトに緩衝塔が接続されており、該緩衝塔が、密閉
系の塔と、該塔の下部に設けられた排ガス入口と、該塔
の上部に設けられた排ガス出口と、該塔に取り付けられ
たバーナとを備えていて、該緩衝塔で、予熱装置から排
出される排ガスに同伴する金属スクラップの小片を捕捉
すると共に、予熱装置から排出される排ガスに含まれる
一酸化炭素を燃焼するようにして成ることを特徴とする
排ガスの処理装置。1. A treatment device for exhaust gas discharged from a preheating device mounted on the top of a melting furnace, wherein a buffer tower is connected to an exhaust gas duct of the preheating device, and the buffer tower is a closed system. A tower, an exhaust gas inlet provided at a lower part of the tower, an exhaust gas outlet provided at an upper part of the tower, and a burner attached to the tower. An exhaust gas treatment device, which captures small pieces of metal scrap accompanying the exhaust gas and combusts carbon monoxide contained in the exhaust gas discharged from the preheating device.
排出される排ガスの処理装置であって、予熱装置の排ガ
スダクトに緩衝塔が接続されており、該緩衝塔が、密閉
系の塔と、該塔内にＵ字形流路を形成する中仕切りと、
該Ｕ字形流路上流側の該塔上部に設けられた排ガス入口
と、該Ｕ字形流路下流側の該塔上部に設けられた排ガス
出口と、該塔に取り付けられたバーナとを備えていて、
該緩衝塔で、予熱装置から排出される排ガスに同伴する
金属スクラップの小片を捕捉すると共に、予熱装置から
排出される排ガスに含まれる一酸化炭素を燃焼するよう
にして成ることを特徴とする排ガスの処理装置。2. An apparatus for treating exhaust gas discharged from a preheating device mounted on the top of a melting furnace, wherein a buffer tower is connected to an exhaust gas duct of the preheating device, and the buffer tower is a closed system. A tower, and a partition forming a U-shaped channel in the tower;
An exhaust gas inlet provided at the upper part of the tower upstream of the U-shaped flow path, an exhaust gas outlet provided at the upper part of the tower downstream of the U-shaped flow path, and a burner attached to the tower. ,
The exhaust gas characterized in that the buffer tower captures small pieces of metal scrap accompanying the exhaust gas discharged from the preheating device, and burns carbon monoxide contained in the exhaust gas discharged from the preheating device. Processing equipment.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10055896A JPH11237191A (en) | 1998-02-19 | 1998-02-19 | Device for treating exhaust gas from furnace-top preheating device |
| KR1019980052696A KR100538277B1 (en) | 1998-01-07 | 1998-11-30 | Preheating device on the top part of furnace |
| TW87120240A TW410265B (en) | 1998-01-07 | 1998-12-07 | Furnace-top preheating equipment |
| MYPI9805700 MY123180A (en) | 1998-01-07 | 1998-12-17 | Furnace top preheating system |
| DE1999100123 DE19900123A1 (en) | 1998-01-07 | 1999-01-05 | Processing apparatus of waste gas from smelter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10055896A JPH11237191A (en) | 1998-02-19 | 1998-02-19 | Device for treating exhaust gas from furnace-top preheating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11237191A true JPH11237191A (en) | 1999-08-31 |
Family
ID=13011892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10055896A Pending JPH11237191A (en) | 1998-01-07 | 1998-02-19 | Device for treating exhaust gas from furnace-top preheating device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11237191A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7062230B1 (en) | 1998-09-30 | 2006-06-13 | Canon Kabushiki Kaisha | Communication device, image-pickup device, storage medium and communication method |
| CN100402927C (en) * | 2004-12-29 | 2008-07-16 | 清华大学 | Integrated plant of circulating fluid bed type boiler for burnning garbage and purifying tail gas |
| CN102878822A (en) * | 2012-10-24 | 2013-01-16 | 辽宁环宇环保技术有限公司 | Device and method for purifying and recycling furnace gas of hermetic ore smelting furnace |
| CN103409576A (en) * | 2013-08-14 | 2013-11-27 | 北京首钢国际工程技术有限公司 | Energy recovery and dry dedusting process for gas from direct melting furnace |
-
1998
- 1998-02-19 JP JP10055896A patent/JPH11237191A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7062230B1 (en) | 1998-09-30 | 2006-06-13 | Canon Kabushiki Kaisha | Communication device, image-pickup device, storage medium and communication method |
| US7477880B2 (en) | 1998-09-30 | 2009-01-13 | Canon Kabushiki Kaisha | Communication device, image-pickup device, storage medium and communication method |
| CN100402927C (en) * | 2004-12-29 | 2008-07-16 | 清华大学 | Integrated plant of circulating fluid bed type boiler for burnning garbage and purifying tail gas |
| CN102878822A (en) * | 2012-10-24 | 2013-01-16 | 辽宁环宇环保技术有限公司 | Device and method for purifying and recycling furnace gas of hermetic ore smelting furnace |
| CN102878822B (en) * | 2012-10-24 | 2015-06-10 | 辽宁环宇环保科技股份有限公司 | Device and method for purifying and recycling furnace gas of hermetic ore smelting furnace |
| CN103409576A (en) * | 2013-08-14 | 2013-11-27 | 北京首钢国际工程技术有限公司 | Energy recovery and dry dedusting process for gas from direct melting furnace |
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