JPS6075508A - Treating device for waste gas in continuous steel making furnace - Google Patents
Treating device for waste gas in continuous steel making furnaceInfo
- Publication number
- JPS6075508A JPS6075508A JP18040383A JP18040383A JPS6075508A JP S6075508 A JPS6075508 A JP S6075508A JP 18040383 A JP18040383 A JP 18040383A JP 18040383 A JP18040383 A JP 18040383A JP S6075508 A JPS6075508 A JP S6075508A
- Authority
- JP
- Japan
- Prior art keywords
- furnace
- refining
- waste gas
- oxygen
- exhaust gas
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/38—Removal of waste gases or dust
- C21C5/40—Offtakes or separating apparatus for converter waste gases or dust
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
Description
【発明の詳細な説明】
〔本発明の技術分野〕
本発明は、連続製鋼炉、特に橋形連続製鋼炉における排
ガス処理装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an exhaust gas treatment device for a continuous steel making furnace, particularly a bridge type continuous steel making furnace.
一般的な橋形連続製鋼炉は第１図に示すように、炉本体
１と炉蓋８とから構成されている。As shown in FIG. 1, a typical bridge-type continuous steelmaking furnace is comprised of a furnace body 1 and a furnace lid 8.
炉本体１は前後端に受湯口２及び出湯口３を有し、内面
に耐火材４を内張シして動形状とした密閉炉であり、途
中に耐火材の堰５を設け、反応槽６と鎮静槽７に分割し
、鎮静槽７には排滓口１２を設けている。The furnace body 1 is a closed furnace that has an inlet 2 and an outlet 3 at the front and rear ends, and has a dynamic shape by lining the inner surface with a refractory material 4. A weir 5 made of refractory material is provided in the middle, and a reaction tank It is divided into a sedation tank 6 and a sedation tank 7, and the sedation tank 7 is provided with a sludge discharge port 12.
一方炉蓋８には、造滓剤投入口１１及び排気口１Ｇを設
けており、炉体同様耐火材９で内張シされていて、上方
から複数本の酸素ランス１３が炉内に挿入できる構造と
している。On the other hand, the furnace lid 8 is provided with a sludge inlet 11 and an exhaust port 1G, and is lined with a refractory material 9 like the furnace body, and multiple oxygen lances 13 can be inserted into the furnace from above. It has a structure.
溶銑１４は受湯口２から連続的に供給され、反応槽６に
おいて、酸素ランス１５によって上方から、高圧酸素１
８が吹込まれ、酸化反応が行なわれ、銑鉄成分のものが
鋼成分のものに変る。同時に造滓剤１６が投入口１１が
ら、炉内反応槽６に連続的に供給されており、滓化して
スラグ１７となシ、ランス保腹及び精錬反応を行い、役
目の終ったスラグ１７は排滓口１２から排出される。Hot metal 14 is continuously supplied from the inlet 2, and in the reaction tank 6, high pressure oxygen 1 is applied from above by an oxygen lance 15.
8 is injected, an oxidation reaction takes place, and the pig iron component changes to the steel component. At the same time, a slag-forming agent 16 is continuously supplied to the reactor tank 6 in the furnace through the inlet 11, and the slag 17 is turned into slag and undergoes lance retention and refining reactions, and the slag 17 that has finished its role is It is discharged from the slag discharge port 12.
溶鋼は反応槽６から鎮静槽７に流入し、スラグ１７との
分離を行い出湯口６がら溶鋼１５として連続的に出鋼さ
れる。一方炉内においては、純酸素１８による脱炭反応
によｐ ｃｏ ガスを主体とした多量の精錬排ガス１９
が発生し、排気口１０から排出される。The molten steel flows from the reaction tank 6 into the calming tank 7, is separated from the slag 17, and is continuously tapped as molten steel 15 through the tap 6. On the other hand, inside the furnace, a large amount of refining exhaust gas 19 mainly consisting of p co gas is generated due to the decarburization reaction caused by pure oxygen 18.
is generated and discharged from the exhaust port 10.
従来の上記製鋼炉における排気系統では、上記精錬排ガ
ス１９の排気方法に問題がある。すなわち、通常の排気
系統は第１図に示すように、排気フード２０及びダクト
２０′バツグフイルタ２２、排気ファン２３及び煙突２
４とから構成されていて、精錬排ガス１９は、うすめ空
気と共に排気ガス１９′として排気フード２ｏに吸引さ
れ、バッグフィルタ２２で集塵された後、排気ファン２
５で吸引されつつ煙突２４から排気される。この場合、
吸引する排ガス量が多すぎると炉内が極端な負圧となシ
、外の空気が炉内に吸引され、炉内で精錬排ガス１９が
燃焼して、高温になって、耐火物寿命が短くなり、又逆
に少なすぎると、精錬排ガス１９が炉外に洩れ、いわゆ
る炉気吹出しにより、操業ができなくなる。In the conventional exhaust system in the above-mentioned steelmaking furnace, there is a problem in the method of exhausting the above-mentioned refining exhaust gas 19. That is, as shown in FIG. 1, a normal exhaust system includes an exhaust hood 20, a duct 20', a bug filter 22, an exhaust fan 23, and a chimney 2.
4, the refining exhaust gas 19 is sucked into the exhaust hood 2o together with diluted air as exhaust gas 19', collected by the bag filter 22, and then passed through the exhaust fan 2.
It is exhausted from the chimney 24 while being sucked in at step 5. in this case,
If too much exhaust gas is sucked in, the inside of the furnace will become extremely negative pressure, outside air will be sucked into the furnace, the refining exhaust gas 19 will be burned in the furnace, the temperature will become high, and the life of the refractories will be shortened. On the other hand, if the amount is too small, the refining exhaust gas 19 will leak out of the furnace, causing so-called furnace air blow-out, which will make the operation impossible.
したがって、従来は、炉内圧力を微圧計２９で検出して
、ダンパ２１の開度を調節して、排ガス吸引量を制御し
ていた。しかし、この方法では、精錬排ガス１９が非常
に温度が高く、ダストが多く含壕れるため、炉内圧を検
出する微圧計２９の信頼性が悪く、満足して使用できな
かった。Therefore, conventionally, the pressure inside the furnace was detected by a micropressure gauge 29, and the opening degree of the damper 21 was adjusted to control the exhaust gas suction amount. However, in this method, the refining exhaust gas 19 has a very high temperature and contains a lot of dust, so the low pressure gauge 29 that detects the furnace pressure has poor reliability and cannot be used satisfactorily.
そこで、本発明は、上記した欠点を有する微圧計を使用
せずに、排ガス吸引′址を簡単に制御できる連続製鋼炉
における排ガス処理装置を提供することを目的とする。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an exhaust gas treatment device for a continuous steelmaking furnace that can easily control the exhaust gas suction area without using a micropressure gauge having the above-mentioned drawbacks.
そして、本発明は、上記目的を達成する手段として、酸
素吸精量の変化に応じて排ガスの吸引量を調節する制御
回路を設けた点にある。すなわち、本発明は、連続製鋼
炉内で発生する精錬排ガスを吸引、排気する装置におい
て、排ガスの吸引量を、連続製鋼炉の酸素吹精Ｍの変化
に応じて、調節する制御回路を設けたことを特徴とする
連続製鋼炉における排ガス処理装置である。As a means for achieving the above object, the present invention is provided with a control circuit that adjusts the amount of exhaust gas sucked in accordance with changes in the amount of oxygen sucked. That is, the present invention provides a device for sucking and exhausting refining exhaust gas generated in a continuous steelmaking furnace, which is provided with a control circuit that adjusts the amount of exhaust gas sucked in accordance with changes in the oxygen blast M of the continuous steelmaking furnace. This is an exhaust gas treatment device for a continuous steelmaking furnace characterized by the following.
本発明は、精錬排ガスの発生址が、純酸素の吹精量に比
例することに着目し、酸素吹精量の増減に応じて、ダン
パ開度を調節し、排ガス吸引量を制御するようにしたも
のである。そして、本発明において、排ガスの吸引量を
制御するダンパは、排気ガスのダクト内に配設しても良
く、また、バッグフィルタと排気ファンとの間に配設す
ることもできる。また、本発明において、排ガス吸引量
を制御するために、排気ファンの回転数を制御したり、
ベーン角度を調節して、排風量を制御することもできる
ものである。The present invention focuses on the fact that the amount of refining exhaust gas generated is proportional to the amount of pure oxygen blown, and the damper opening degree is adjusted according to the increase or decrease in the amount of oxygen blown to control the amount of exhaust gas suction. This is what I did. In the present invention, the damper that controls the amount of suction of exhaust gas may be disposed within the exhaust gas duct, or may be disposed between the bag filter and the exhaust fan. In addition, in the present invention, in order to control the amount of exhaust gas suction, the rotation speed of the exhaust fan is controlled,
It is also possible to control the amount of air discharged by adjusting the vane angle.
以下、第２図に基づいて本発明の詳細な説明する。第２
図は本発明の実施例である連続製鋼炉における排ガス処
理装置を示す図であって、従来の連続製鋼炉を図示した
第１図と同一部分には同−何分が付与されている。そこ
で、第１図の従来の製鋼炉との共通個所を省略して説明
すると、精録排ガス１９は排気フード２ｏ、排気ダクト
２０′を通り、バッグフィルタ２２等の集塵機を介して
排気ファン２５で吸引され、煙突２４から排気される。Hereinafter, the present invention will be explained in detail based on FIG. Second
The figure shows an exhaust gas treatment device in a continuous steel making furnace which is an embodiment of the present invention, and the same parts as those in FIG. 1, which shows a conventional continuous steel making furnace, are given the same numbers. Therefore, to explain the parts common to the conventional steelmaking furnace shown in FIG. It is sucked in and exhausted from the chimney 24.
排気ダクト２０′の途中には風ｉ調整ダンパ２１を設け
、サーボモータ２８により、開度を調節し、排ガス吸引
量を制御する。一方、酸素ランス１３に供給される純酸
素１８の量は、オリフィス２５によって検出し、指示計
２６に指示されている。このような排気系統において、
調節計２７を設け、酸素供給量の変化を入力として、サ
ーボモータ２８によって、ダンパ２１の開度全自動的に
調節する制御回路を設け、酸素吹精量に応じて、排ガス
の吸引量を制御する。この結果精錬炉の炉内をほぼ一定
の圧力状態に維持することができ、過剰な空気の流入及
び炉気吹出しが防止でき、精錬炉の安定操業が可能とな
る。A wind i adjustment damper 21 is provided in the middle of the exhaust duct 20', and the opening degree is adjusted by a servo motor 28 to control the exhaust gas suction amount. On the other hand, the amount of pure oxygen 18 supplied to the oxygen lance 13 is detected by an orifice 25 and indicated by an indicator 26. In such an exhaust system,
A controller 27 is provided, and a control circuit is provided that automatically adjusts the opening of the damper 21 using a servo motor 28 using changes in the amount of oxygen supplied as input, and controls the amount of suction of exhaust gas according to the amount of oxygen blown. do. As a result, the inside of the refining furnace can be maintained at a substantially constant pressure state, preventing excessive air from entering and blowing out of the furnace, and allowing stable operation of the refining furnace.
本発明は、以上詳記したように、酸素吹精量の変化に応
じて排ガスの吸引量を調節する制御回路を設けたもので
あり、炉内に特別な検出端を使用しないため、故障が少
く信頼性が高いことと、精錬炉の一時停止時、すなわち
、酸素吹精を停止した時には、自動的にダンパが全閉と
なり、排ガスの吸引が停止し、炉内への冷空気の侵入が
なく々り、炉内溶鋼、スラグの熱放散及び耐火材の急冷
によるスポーリングが防止できる効果が生ずるものであ
る。As described in detail above, the present invention is equipped with a control circuit that adjusts the suction amount of exhaust gas according to changes in the amount of oxygen blown, and since no special detection end is used in the furnace, there is no possibility of failure. In addition, when the refining furnace is temporarily stopped, that is, when oxygen blowing is stopped, the damper is automatically fully closed, stopping exhaust gas suction and preventing cold air from entering the furnace. This has the effect of preventing spalling due to cracking, heat dissipation from the molten steel in the furnace and slag, and rapid cooling of the refractory material.
第１図は従来の橋形連続製鋼炉を示し、第２図は本発明
の実施例である連続製鋼炉における排ガス処理装置を示
す。
１・・・炉本体、２・・・受湯口、
３・・・出湯口、 ４・・・耐火材、
５・・・堰、 ６・・・反応槽、
７・・・鎮静槽、 ８・・・炉蓋、
９・・・耐火材、１０・・・排気口、
１１・・・造滓剤投入口、
１２・・・排滓口、１３・・０酸素ランス、１４・・・
溶銑、 １５・・・溶鋼、
１６・・・造滓剤、１７・・・スラグ、１８・・・純酸
素、１９・・・ａ銖排ガス、１９′・・・排気ガス、２
ｏ・・・排気フード、２０・・・ダクト、２１・・・ダ
ンパ、２２−・・バッグフィルタ、
２３・・、・排気ファン、
２４・・・煙 突、２５・・・オリフィス、２６・・・
指示計、 ２７・・・調節計、２８・・昔サーボモータ
、
２９・・・微圧計、
復代理人 内 １） 明
復代理人 萩 原 亮 −FIG. 1 shows a conventional bridge-type continuous steel making furnace, and FIG. 2 shows an exhaust gas treatment device for a continuous steel making furnace which is an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Furnace body, 2... Inlet, 3... Outlet, 4... Refractory material, 5... Weir, 6... Reaction tank, 7... Calming tank, 8... ...Furnace lid, 9...Refractory material, 10...Exhaust port, 11...Slag forming agent inlet, 12...Slag exhaust port, 13...Oxygen lance, 14...
Hot metal, 15... Molten steel, 16... Slag forming agent, 17... Slag, 18... Pure oxygen, 19... a exhaust gas, 19'... Exhaust gas, 2
o... Exhaust hood, 20... Duct, 21... Damper, 22-... Bag filter, 23... Exhaust fan, 24... Chimney, 25... Orifice, 26...・
Indicator, 27...Controller, 28...Old servo motor, 29...Low pressure gauge, sub-agents 1) Meifuku representative Ryo Hagiwara -
Claims (1)
置において、排ガスの吸引量を、連続製鋼炉の酸素吹精
量の変化に応じて、調節する制御回路を設けたことを特
徴とする連続製鋼炉における排ガス処理装置。A device for sucking in and exhausting refining exhaust gas generated in a continuous steelmaking furnace, characterized by being provided with a control circuit that adjusts the amount of sucked exhaust gas in accordance with changes in the amount of oxygen blown in the continuous steelmaking furnace. Exhaust gas treatment equipment for steelmaking furnaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18040383A JPS6075508A (en) | 1983-09-30 | 1983-09-30 | Treating device for waste gas in continuous steel making furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18040383A JPS6075508A (en) | 1983-09-30 | 1983-09-30 | Treating device for waste gas in continuous steel making furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6075508A true JPS6075508A (en) | 1985-04-27 |
| JPH0257123B2 JPH0257123B2 (en) | 1990-12-04 |
Family
ID=16082629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18040383A Granted JPS6075508A (en) | 1983-09-30 | 1983-09-30 | Treating device for waste gas in continuous steel making furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6075508A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2582970B2 (en) * | 1991-10-23 | 1997-02-19 | 三菱化学株式会社 | Method for removing solid foreign matter from terephthalic acid aqueous solution |
-
1983
- 1983-09-30 JP JP18040383A patent/JPS6075508A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0257123B2 (en) | 1990-12-04 |
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