JP3106570B2 - Arc furnace exhaust gas treatment equipment - Google Patents
Arc furnace exhaust gas treatment equipmentInfo
- Publication number
- JP3106570B2 JP3106570B2 JP03191022A JP19102291A JP3106570B2 JP 3106570 B2 JP3106570 B2 JP 3106570B2 JP 03191022 A JP03191022 A JP 03191022A JP 19102291 A JP19102291 A JP 19102291A JP 3106570 B2 JP3106570 B2 JP 3106570B2
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- arc furnace
- suction system
- blower
- bag filter
- 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
Links
Landscapes
- Filtering Of Dispersed Particles In Gases (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明はアーク炉から発生する排
ガスをバッグフイルター集塵装置により処理する装置に
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for treating exhaust gas generated from an arc furnace by a bag filter dust collector.
【０００２】[0002]
【従来の技術】鉄スクラップ等の金属材料をアーク熱に
より溶解するアーク炉からは、周知のように粉塵を含ん
だ高温度の排ガスが多量に排出される。そこで従来から
上記排ガスはバッグフイルター集塵装置を通すことによ
り無害化した後に大気中に放出させている。2. Description of the Related Art As is well known, a large amount of high-temperature exhaust gas containing dust is discharged from an arc furnace in which a metallic material such as iron scrap is melted by arc heat. Therefore, conventionally, the exhaust gas has been rendered harmless by passing it through a bag filter dust collector, and then released into the atmosphere.
【０００３】ところで、従来のアーク炉排ガス処理装置
は、特開平２−６８４１９号公報或いは図３に概略を示
したように、送風機ａの下流側にバッグフイルター集塵
装置ｂが設けられ、該送風機ａの上流側は直接吸引系統
ｃと間接吸引系統ｄに分岐され、直接吸引系統ｃは燃焼
筒ｅ，ダンパｆを介してアーク炉ｇの蓋に直接連結さ
れ、アーク炉ｇ内で発生した排ガスを該直接吸引系統ｃ
に直接吸引すると共に、他方の間接吸引系統ｄはアーク
炉ｇ外に漏洩した排ガスを建屋ｈの上端より吸引し、バ
ッグフイルター集塵装置ｂにその粉塵を回収させて大気
中に放出するようにしている。As shown in FIG. 3 of Japanese Patent Application Laid-Open No. 2-68419 or FIG. 3, a conventional arc furnace exhaust gas treatment apparatus is provided with a bag filter dust collector b downstream of a blower a. The upstream side of a is branched into a direct suction system c and an indirect suction system d. The direct suction system c is directly connected to the lid of the arc furnace g via the combustion tube e and the damper f, and the exhaust gas generated in the arc furnace g The direct suction system c
And the other indirect suction system d sucks the exhaust gas leaked out of the arc furnace g from the upper end of the building h, makes the bag filter dust collecting device b collect the dust, and discharges the dust to the atmosphere. ing.
【０００４】[0004]
【発明が解決しようとする課題】ところが、上記従来の
アーク炉排ガス処理装置における直接吸引系統ｃは風量
は少ないが配管抵抗が大きいので風圧を必要とし、間接
吸引系統ｄはその反対に配管抵抗は小さく風圧は必要と
しないが風量を多く必要とする。このため送風機ａは両
系統の所要能力を兼ね備えた極めて大きな風量及び風圧
を持つものとしなければならないという不経済な点があ
った。However, the direct suction system c in the above-described conventional arc furnace exhaust gas treatment apparatus requires a wind pressure because the air flow is small but the pipe resistance is large, and the indirect suction system d has the opposite pipe resistance. It is small and does not require wind pressure, but requires a large air volume. For this reason, there was an uneconomical point that the blower a had to have an extremely large air volume and wind pressure having the required capacity of both systems.
【０００５】また、直接吸引系統ｃを流れる排ガスは間
接吸引系統ｄを流れる排ガスに比べ粉塵量が極めて大き
いので、その粉塵が送風機ａを損傷させ易いという問題
もあった。Further, the exhaust gas flowing through the direct suction system c has an extremely large amount of dust as compared with the exhaust gas flowing through the indirect suction system d. Therefore, there is another problem that the dust easily damages the blower a.
【０００６】[0006]
【課題を解決するための手段】本発明のアーク炉排ガス
処理装置は上記課題を解決しようとするもので、アーク
炉の内部から排ガスを直接吸引し送風機の上流側にバッ
グフイルター集塵装置を設けてなる直接吸引系統と、ア
ーク炉の環境から排ガスを間接的に吸引し送風機の下流
側にバッグフイルター集塵装置を設けてなる間接吸引系
統を具備し、前記直接吸引系統と間接吸引系統とを結ぶ
連通ダクトを設け、アーク炉の材料装入期および出鋼期
には該連通ダクトに設けたダンパを開くことによりアー
ク炉環境の排ガスを前記両吸引系統の送風機により吸引
するようにしたことを特徴とする。DISCLOSURE OF THE INVENTION An arc furnace exhaust gas treatment apparatus according to the present invention is intended to solve the above-mentioned problems. A bag filter dust collector is provided upstream of a blower by directly sucking exhaust gas from the inside of an arc furnace. A direct suction system, and an indirect suction system in which exhaust gas is indirectly sucked from the environment of the arc furnace and a bag filter dust collector is provided downstream of the blower, and the direct suction system and the indirect suction system are provided. A communication duct is provided to connect the exhaust gas and the exhaust gas in the environment of the arc furnace by the damper provided in the communication duct during the material charging stage and the tapping period of the arc furnace by opening the damper. Features.
【０００７】[0007]
【作用】直接吸引系統と間接吸引系統に夫々送風機，バ
ッグフイルター集塵装置を設けているので、その各系統
に適した能力の送風機およびバッグフイルター集塵装置
を設けることができる。直接吸引系統では、送風機の上
流側にバッグフイルター集塵装置を設けたことにより高
濃度の粉塵から送風機を保護することができる。間接吸
引系統では、送風機の下流側にバッグフイルター集塵装
置を設けたことにより、大容量のバッグフイルター集塵
装置でもその構成が簡略化されコストが低減できる。連
結ダクトのダンパを開け材料装入期または出鋼期にアー
ク炉の外に漏洩した排ガスを両吸引系統の送風機に吸引
させることで両送風機の能力を常に有効活用させる。Since the blower and the bag filter dust collecting device are provided in the direct suction system and the indirect suction system respectively, a blower and a bag filter dust collecting device suitable for each system can be provided. In the direct suction system, the blower can be protected from high-concentration dust by providing a bag filter dust collector upstream of the blower. In the indirect suction system, the bag filter dust collector is provided downstream of the blower, so that even a large-capacity bag filter dust collector can have a simplified configuration and a reduced cost. By opening the damper of the connecting duct and exhausting gas that has leaked out of the arc furnace during the material charging period or the tapping period, the blowers of both suction systems always use the capacity of both blowers effectively.
【０００８】[0008]
【実施例】次に図１に従い本発明の実施例を説明する。
図において、１はアーク炉、２は該アーク炉１の建屋、
３は該建屋２に設けられたクレーンで、該クレーン３に
はアーク炉１に投入しようとする鉄スクラップ等の原材
料を搬入して来るためのバケット４が吊下されている。
５はアーク炉１の蓋体６に形成された排気管７と連通し
得る直引管で、該直引管５にはダンパ２７が設けられて
いる。また該直引管５には燃焼筒８が連設され該燃焼筒
８が直接吸引系統９に連通する。１０は該直接吸引系統
９の送風機で、該送風機１０の上流側にバッグフイルタ
ー集塵装置１１が設けられている。FIG. 1 shows an embodiment of the present invention.
In the figure, 1 is an arc furnace, 2 is a building of the arc furnace 1,
Reference numeral 3 denotes a crane provided in the building 2. A bucket 4 for carrying raw materials such as iron scrap to be put into the arc furnace 1 is hung on the crane 3.
Reference numeral 5 denotes a direct drawing pipe which can communicate with an exhaust pipe 7 formed on the lid 6 of the arc furnace 1. The direct drawing pipe 5 is provided with a damper 27. Further, a combustion tube 8 is connected to the direct drawing tube 5, and the combustion tube 8 directly communicates with the suction system 9. Reference numeral 10 denotes a blower of the direct suction system 9, and a bag filter dust collecting device 11 is provided upstream of the blower 10.
【０００９】一方、１２は先端がダンパ１３を介して建
屋２の吸気口２３に連結されている間接吸引系統で、該
間接吸引系統１２にはダンパ１４を介して送風機１５が
並列に設けられ該送風機１５の下流側に大容量のバッグ
フイルター集塵装置１６が設けられている。そして直接
吸引系統９と間接吸引系統１２とを連通ダクト１７によ
り結び、該連通ダクト１７にダンパ１８を設けている。On the other hand, reference numeral 12 denotes an indirect suction system whose tip is connected to an intake port 23 of the building 2 via a damper 13. The blower 15 is provided in parallel with the indirect suction system 12 via a damper 14. A large-capacity bag filter dust collector 16 is provided downstream of the blower 15. The direct suction system 9 and the indirect suction system 12 are connected by a communication duct 17, and a damper 18 is provided in the communication duct 17.
【００１０】なおバッグフイルター集塵装置１６は送風
機１５から圧送された排ガスを布バッグ１９に通して濾
過するものであるが、この圧送型の場合はバグハウス２
０の内面が外面より少しプラス圧になるだけであるの
で、耐圧性はさほど要せず大型にしても製造コストがさ
ほど掛からない。一方、前記バッグフイルター集塵装置
１１は送風機１０の吸引力で排ガスを布バッグ２１に通
過させるものであるので、そのバグハウス２２の内面に
は大きな負圧が掛かり耐圧性の構造を必要とするが、風
量が少なく小型でよいため製造コストは低めに抑えられ
る。ちなみにバッグフイルター集塵装置１１の処理能力
は４０００ｍ3 ／minであるのに対しバッグフイルター
集塵装置１６の処理能力は１８０００ｍ3 ／minであ
る。The bag filter dust collector 16 filters the exhaust gas fed from the blower 15 through the cloth bag 19.
Since the inner surface of 0 is only slightly more positive than the outer surface, the pressure resistance is not so much required, and even if it is large, the manufacturing cost is not so much. On the other hand, since the bag filter dust collector 11 allows exhaust gas to pass through the cloth bag 21 by the suction force of the blower 10, a large negative pressure is applied to the inner surface of the bag house 22 and a pressure-resistant structure is required. However, since the air volume is small and the size can be small, the production cost can be kept low. Incidentally, the processing capacity of the bag filter dust collector 11 is 4000 m 3 / min, while the processing capacity of the bag filter dust collector 16 is 18000 m 3 / min.
【００１１】このアーク炉排ガス処理装置では、図示し
たように蓋体６が閉止されている溶解期には、排気管
７，直引管５，燃焼筒８を介してアーク炉１の内部から
直接吸引された排ガスを直接吸引系統９の送風機１０に
吸引させ、バッグフイルター集塵装置１１を通つて大気
中に放出させ、そのとき炉外に洩れ出た排ガスは建屋２
の吸気口２３より間接吸引系統１２，送風機１５を通っ
てバッグフイルター集塵装置１６により濾過されて大気
中に放出される。そして、材料装入のために蓋体６を開
けたとき、或いは出鋼時のように排ガスが多量に炉外に
出るときは、ダンパ２７を閉じ、ダンパ１８を開けて連
通ダクト１７によって直接吸引系統９と間接吸引系統１
２を連通させ、吸気口２３より吸引した排ガスをダンパ
１８を通して直接吸引系統９にも吸引させ両吸引系統の
送風機１０および１５を動員して建屋２内に立ち昇った
大量の排ガスを吸引し建屋２外に直接排ガスが洩れ出る
のを防ぐ。In the arc furnace exhaust gas treatment apparatus, during the melting period in which the lid 6 is closed as shown in FIG. The sucked exhaust gas is directly sucked into a blower 10 of a suction system 9 and discharged into the atmosphere through a bag filter dust collecting device 11.
The air is filtered by the bag filter dust collector 16 through the indirect suction system 12 and the blower 15 from the intake port 23 of the air filter 23 and discharged into the atmosphere. When the lid 6 is opened for charging the material or when a large amount of exhaust gas goes out of the furnace such as when tapping steel, the damper 27 is closed, the damper 18 is opened, and the suction duct 17 directly sucks the air. System 9 and indirect suction system 1
2 and the exhaust gas sucked from the intake port 23 is also sucked directly into the suction system 9 through the damper 18, and the blowers 10 and 15 of both suction systems are mobilized to suck a large amount of the exhaust gas rising into the building 2 to suck the exhaust gas. 2 Prevent the exhaust gas from leaking directly to the outside.
【００１２】図２に示したアーク炉排ガス処理装置は、
建屋２内にアーク炉１を囲うように設けられたスカイハ
ウス２４にダンパ２８を介して間接吸引系統１２を接続
し、アーク炉１から漏洩した排ガスを該スカイハウス２
４から吸引できるようにしたもので、このようにアーク
炉１の環境からの排ガスは建屋２内から吸引してもスカ
イハウス２４から吸引するようにしてもよく、或いはさ
らに別にアーク炉１の開口部の近くに吸引フード（図示
せず）を設けてこれから吸引させるようにしてもよい。
或いはスカイハウス２４からの吸引と建屋２内からの吸
引、さらには上記吸引フードからの吸引等が同時に行な
われるようにしてもよい。なお、この図２に併記したよ
うに直接吸引系統９に鉄スクラップ２５を予熱するため
のバイパス路２６を設けてアーク炉１内より直接吸引し
た高温度の排ガスの持つ顕熱により鉄スクラップ２５を
予熱し、省エネルギー化が同時に達成できるようにして
もよい。The arc furnace exhaust gas treatment apparatus shown in FIG.
The indirect suction system 12 is connected via a damper 28 to a sky house 24 provided in the building 2 so as to surround the arc furnace 1, and the exhaust gas leaked from the arc furnace 1 is removed from the sky house 2.
In this way, the exhaust gas from the environment of the arc furnace 1 may be sucked from the building 2 or from the sky house 24, or may be further separated from the opening of the arc furnace 1. A suction hood (not shown) may be provided near the unit to cause suction from now on.
Alternatively, the suction from the sky house 24 and the suction from the inside of the building 2, and further, the suction from the suction hood and the like may be performed simultaneously. As shown in FIG. 2, a bypass 26 is provided in the direct suction system 9 for preheating the iron scrap 25, and the iron scrap 25 is heated by the sensible heat of the high-temperature exhaust gas directly sucked from the arc furnace 1. Preheating and energy saving may be achieved at the same time.
【００１３】[0013]
【発明の効果】このように本発明のアーク炉排ガス処理
装置は、材料装入時や出鋼時など多量に排ガスが炉外に
出るときに直接吸引系統の送風機と間接吸引系統の送風
機の両送風機でその排ガスを吸引できるようにしたの
で、両送風機の能力が無駄なく使用でき最大限の吸引効
果を経済的に達成することができる。また、バッグフイ
ルター集塵装置についても適正な使用ができ製作コスト
が低減できると共に、直接吸引系統では送風機の上流側
にバッグフイルター集塵装置を設けているので、送風機
を短期で損傷させることがないなど有益である。As described above, the arc furnace exhaust gas treatment apparatus of the present invention can be used with both a direct suction system blower and an indirect suction system blower when a large amount of exhaust gas flows out of the furnace, such as during material charging or tapping. Since the exhaust gas can be sucked by the blower, the capacity of both blowers can be used without waste, and the maximum suction effect can be achieved economically. In addition, the bag filter dust collector can be used properly and the manufacturing cost can be reduced, and the direct suction system has a bag filter dust collector upstream of the blower, so that the blower is not damaged in a short time. It is useful.
【図１】本発明のアーク炉排ガス処理装置の一実施例を
示した配管系統図。FIG. 1 is a piping diagram showing an embodiment of an arc furnace exhaust gas treatment apparatus of the present invention.
【図２】本発明のアーク炉排ガス処理装置の他の実施例
を示した配管系統図。FIG. 2 is a piping system diagram showing another embodiment of the arc furnace exhaust gas treatment apparatus of the present invention.
【図３】従来のアーク炉排ガス処理装置の配管系統図。FIG. 3 is a piping diagram of a conventional arc furnace exhaust gas treatment apparatus.
１ アーク炉 ２ 建屋 ５ 直引管 ９ 直接吸引系統 １０ 送風機 １１ バッグフイルター集塵装置 １２ 間接吸引系統 １５ 送風機 １６ バッグフイルター集塵装置 １７ 連通ダクト １８ ダンパ ２０ バグハウス DESCRIPTION OF SYMBOLS 1 Arc furnace 2 Building 5 Direct drawing pipe 9 Direct suction system 10 Blower 11 Bag filter dust collector 12 Indirect suction system 15 Blower 16 Bag filter dust collector 17 Communication duct 18 Damper 20 Bag house
Claims (1)
送風機の上流側にバッグフイルター集塵装置を設けてな
る直接吸引系統と、アーク炉の環境から排ガスを間接的
に吸引し送風機の下流側にバッグフイルター集塵装置を
設けてなる間接吸引系統を具備し、前記直接吸引系統と
間接吸引系統とを結ぶ連通ダクトを設け、アーク炉の材
料装入期および出鋼期には該連通ダクトに設けたダンパ
を開くことによりアーク炉環境の排ガスを前記両吸引系
統の送風機により吸引するようにしたことを特徴とする
アーク炉排ガス処理装置。1. A direct suction system in which exhaust gas is directly sucked from the inside of an arc furnace and a bag filter dust collecting device is provided upstream of the blower, and a downstream side of the blower which indirectly sucks the exhaust gas from the environment of the arc furnace. An indirect suction system provided with a bag filter dust collector is provided, and a communication duct connecting the direct suction system and the indirect suction system is provided, and the communication duct is connected to the arc furnace during the material charging period and the tapping period. An arc furnace exhaust gas treatment apparatus characterized in that exhaust gas in the arc furnace environment is sucked by the fans of both suction systems by opening the provided damper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03191022A JP3106570B2 (en) | 1991-07-04 | 1991-07-04 | Arc furnace exhaust gas treatment equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03191022A JP3106570B2 (en) | 1991-07-04 | 1991-07-04 | Arc furnace exhaust gas treatment equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0510687A JPH0510687A (en) | 1993-01-19 |
| JP3106570B2 true JP3106570B2 (en) | 2000-11-06 |
Family
ID=16267592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03191022A Expired - Lifetime JP3106570B2 (en) | 1991-07-04 | 1991-07-04 | Arc furnace exhaust gas treatment equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3106570B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011242055A (en) * | 2010-05-18 | 2011-12-01 | Daido Steel Co Ltd | Operation method of dust collector for arc furnace |
| US8492662B2 (en) * | 2011-02-28 | 2013-07-23 | Abb Inc. | Arc-resistant dry type transformer enclosure having arc fault damper apparatus |
-
1991
- 1991-07-04 JP JP03191022A patent/JP3106570B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0510687A (en) | 1993-01-19 |
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