JPH0445563B2 - - Google Patents
Info
- Publication number
- JPH0445563B2 JPH0445563B2 JP9882884A JP9882884A JPH0445563B2 JP H0445563 B2 JPH0445563 B2 JP H0445563B2 JP 9882884 A JP9882884 A JP 9882884A JP 9882884 A JP9882884 A JP 9882884A JP H0445563 B2 JPH0445563 B2 JP H0445563B2
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- converter
- furnace
- blowing
- signal
- 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
- 238000007664 blowing Methods 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 10
- 239000007789 gas Substances 0.000 description 44
- 238000011084 recovery Methods 0.000 description 11
- 238000006243 chemical reaction Methods 0.000 description 7
- 238000002485 combustion reaction Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 239000000523 sample Substances 0.000 description 5
- 238000001816 cooling Methods 0.000 description 3
- 238000011017 operating method Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 238000004868 gas analysis Methods 0.000 description 2
- 239000013064 chemical raw material Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000005469 synchrotron radiation Effects 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は転炉炉口と排ガスフードを密着させる
密閉式転炉の未燃焼排ガスの回収方法に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for recovering unburned exhaust gas from a closed converter in which the converter mouth and exhaust gas hood are brought into close contact with each other.
発明の目的
転炉操業の熱清算において、炉口から排出され
る排ガス顕熱の全出熱に対する割合は比較的大き
く、且つ排ガス中のCOガスの発熱量も考慮する
と、全熱量は莫大である。Purpose of the Invention In heat calculation during converter operation, the ratio of sensible heat of the exhaust gas discharged from the furnace mouth to the total heat output is relatively large, and when the calorific value of CO gas in the exhaust gas is also taken into account, the total amount of heat is enormous. .
したがつて排ガスの含有するエネルギーを有効
に利用するため、大別して２つの方法がとられて
いる。１つは燃焼型ガス処理設備により排ガス回
収ダクトに空気を吸込ませて排ガスを燃焼させ、
排ガス顕熱および燃焼熱をボイラーにより熱回収
する方法であり、他の一つは非燃焼型ガス処理設
備により、排ガスフードと炉口との間から少量あ
るいは極少量の空気を導入してCOを部分燃焼さ
せるに止め、大部分のCOを未燃焼のまま回収し、
CO含有ガスとして燃料あるいは化学原料として
利用しようとするものである。 Therefore, in order to effectively utilize the energy contained in exhaust gas, two methods are generally used. One is to use combustion-type gas processing equipment to suck air into the exhaust gas collection duct and burn the exhaust gas.
One method is to recover exhaust gas sensible heat and combustion heat using a boiler, and the other is to use non-combustion type gas treatment equipment to introduce a small amount or extremely small amount of air between the exhaust gas hood and the furnace mouth to remove CO. Only partial combustion is performed, and most of the CO is recovered unburned.
The aim is to use the CO-containing gas as a fuel or chemical raw material.
後者の方法すなわち未燃焼ガスの回収方法にお
いては、吹錬開始前排ガス回収ダクトには空気が
満され、該ダクトに吹錬開始後の高濃度CO含有
排ガスが導入されると、該ダクト内のガス組成は
爆発範囲に入り、極めて危険になる。したがつ
て、吹錬直後においては、吹錬用酸素と炉内で発
生するCOとの燃焼状態を確認し、その後系外例
えば炉口と排ガスフードとの間から吸引される空
気中の酸素によりCOを燃焼し、生成されるCO2
と空気中の残留N2により回収系内のダクトの中
を置換し、その後空気の吸引を遮断して高濃度の
COガスを回収する。 In the latter method, that is, the unburned gas recovery method, the exhaust gas recovery duct is filled with air before the start of blowing, and when the high concentration CO-containing exhaust gas is introduced into the duct after the start of blowing, the The gas composition is in the explosive range and becomes extremely dangerous. Therefore, immediately after blowing, check the combustion state of the blowing oxygen and CO generated in the furnace, and then check the combustion state between the blowing oxygen and the CO generated in the furnace. CO 2 produced by burning CO
The remaining N2 in the air displaces the inside of the duct in the collection system, and then the air suction is shut off to remove high concentration N2.
Collect CO gas.
したがつて吹錬スタート時に、排ガスフードを
炉口に密着させることなく、炉内発生のCOの着
火現象を目視で確認し、その後空気による炉排ガ
スの燃焼生成ガスで、排ガス回収ダクト中の空気
が置換されたことをガス分析で確認した上で、排
ガスフードを炉口に密着させる操業方法をとつて
いた。 Therefore, at the start of blowing, the ignition phenomenon of CO generated in the furnace is visually confirmed without placing the exhaust gas hood in close contact with the furnace mouth. After confirming through gas analysis that the gas had been replaced, an operating method was adopted in which the exhaust gas hood was placed in close contact with the furnace mouth.
本発明は、排ガスフードと転炉炉口との間を密
着させた状態で吹錬をスタートし、その後のシー
ケンスを進めることのできる方法を提供するもの
で、排ガスフードの昇降操作という無駄な操作を
省くと共に、吹錬スタート以降転炉−排ガス系を
密閉状態に保つことにより、効率的な未燃焼排ガ
スの回収が可能となり、又系外へのガスの噴出を
防ぐことができるため、公害および安全対策上も
極めて有効な方法である。 The present invention provides a method in which blowing can be started with the exhaust gas hood and the converter mouth in close contact with each other, and the subsequent sequence can proceed, thereby eliminating the need for unnecessary operations such as raising and lowering the exhaust gas hood. By keeping the converter-exhaust gas system in a sealed state after the start of blowing, it is possible to efficiently recover unburned exhaust gas, and it is also possible to prevent gas from blowing out of the system, thereby reducing pollution and This is an extremely effective method for safety measures.
発明の構成・作用
本発明の構成は、転炉炉口と排ガスフードを密
着させる密閉式転炉操業方法において、該転炉の
側壁に設けられた貫通孔に光検出装置を配設し、
該検出装置からの炉内光検出信号から着火を検出
し吹錬シーケンス（操作）をすすめることを特徴
とする密閉式転炉の操業方法である。Structure and operation of the invention The structure of the present invention is a closed converter operating method in which the converter mouth and the exhaust gas hood are brought into close contact with each other.
This method of operating a closed converter is characterized in that ignition is detected from an in-furnace light detection signal from the detection device and a blowing sequence (operation) is advanced.
本発明において密閉式転炉とは、前述の排ガス
フードの下部のスカート下端部と転炉炉口金物を
部分的または全面的に接触させ、転炉炉口全周に
亘つてその間隙を極少にしうる構造を具備した転
炉を言う。 In the present invention, a closed converter is defined as a converter in which the lower end of the skirt at the bottom of the exhaust gas hood and the converter mouthpiece are in partial or full contact with each other, and the gap between them is minimized over the entire circumference of the converter mouth. Refers to a converter with a water-cooling structure.
しかして前述のごとく、密閉式転炉操業におい
て、従来目視によつていたCO着火確認に代つて、
光検出装置による炉内光検出信号によつて着火を
検出しようとするものであるので、先づ光検出装
置および光検出装置による炉内光検出信号につい
て説明する。 However, as mentioned above, in closed converter operation, CO ignition confirmation, which was conventionally done by visual inspection, has been replaced by
Since ignition is to be detected using the in-furnace light detection signal from the photodetector, the photodetector and the in-furnace light detection signal from the photodetector will be explained first.
本発明で光検出装置とは、第１図に示す炉内光
検出プローブ８１、光電変換装置８２、信号処理
装置９を備えている装置である。 In the present invention, the photodetection device is a device equipped with an in-furnace photodetection probe 81, a photoelectric conversion device 82, and a signal processing device 9 shown in FIG.
炉内光検出プローブ８１は、例えば石英系光フ
アイバーの如く、高温の物体から放射される放射
光を、低損失で伝送する導体すなわち光導体を内
蔵し、光導体を冷却保護するための何らかの手段
例えば流体で冷却するための２重管構造を有して
いる。 The in-furnace optical detection probe 81 has a built-in conductor, that is, a light guide, which transmits synchrotron radiation emitted from a high-temperature object with low loss, such as a quartz-based optical fiber, and has some means for cooling and protecting the light guide. For example, it has a double pipe structure for cooling with fluid.
しかしてプローブ先端は炉体側壁に設けられた
貫通孔７に挿入されて受光するため、高温で粉塵
の多い過酷な環境に曝されるために、観測時以外
は貫通孔から離脱できるごとく、摺動装置を備え
て挿入・離脱自在に設備されるのが好ましい。 However, since the tip of the probe is inserted into the through hole 7 provided in the side wall of the furnace body to receive light, it is exposed to a harsh environment with high temperatures and lots of dust. It is preferable that the device be equipped with a moving device so that it can be inserted and removed freely.
光電変換装置は、光導体の伝送する光映像を光
電変換する装置であつてITVカメラがその一例
である。 A photoelectric conversion device is a device that photoelectrically converts an optical image transmitted by a light guide, and an example of the photoelectric conversion device is an ITV camera.
光電変換された映像信号は、信号処理装置９に
送られる。信号処理装置は、炉内光の強度を光電
変換して、映像信号として送られる波形を、適当
なスレシヨルドレベルで２値化し、ピークホール
ドして連続性の判定を行う一連の回路を有するも
のでそのブロツク図と、信号処理の様子を第２図
および第３図に示す。 The photoelectrically converted video signal is sent to the signal processing device 9. The signal processing device has a series of circuits that photoelectrically converts the intensity of the light inside the furnace, binarizes the waveform sent as a video signal at an appropriate threshold level, and holds the peak to determine continuity. The block diagram and signal processing are shown in FIGS. 2 and 3.
光電変換装置がITVの場合を例にとると、
ITVから出力される光電変換信号は炉光内の光
の強度に比例してその映像信号が上昇する。その
１つのモデルが第３図Ａであり、ブロツク図の光
電変換装置８２の出力信号として得られる。２値
化回路１３であらかじめ設定したスレシヨルドレ
ベルで２値化すると、第３図のＢの如き信号が得
られる。ここで「Ｈ」レベルの信号が発生する
と、ピークホールド回路１４で「Ｈ」レベルが保
持され、同期分離回路１６からの垂直同期信号で
リセツトするようにすれば、ピークホールド回路
１４からの出力は第３図Ｃの如き信号になる。し
たがつて各画面（フイールド）に「Ｈ」レベルの
信号が発生したかどうかは、垂直同期信号に同期
してサンプリングすれば検出できる。この「Ｈ」
レベル信号があらかじめ定められた数だけ連続し
ているかどうかは連続性判定回路１５を通すこと
により判定する。 For example, if the photoelectric conversion device is an ITV,
The image signal of the photoelectric conversion signal output from the ITV increases in proportion to the intensity of light within the furnace light. One such model is shown in FIG. 3A, which is obtained as the output signal of the photoelectric conversion device 82 in the block diagram. When the signal is binarized at a threshold level set in advance by the binarization circuit 13, a signal such as B in FIG. 3 is obtained. When an "H" level signal is generated here, the "H" level is held in the peak hold circuit 14, and if it is reset by the vertical synchronization signal from the synchronization separation circuit 16, the output from the peak hold circuit 14 is The signal will be as shown in Figure 3C. Therefore, whether or not an "H" level signal is generated in each screen (field) can be detected by sampling in synchronization with the vertical synchronizing signal. This "H"
Whether or not the level signals are consecutive for a predetermined number of times is determined by passing the level signals through the continuity determination circuit 15.
このような信号処理装置により、着火時点にお
いて「Ｈ」レベルの信号が発生するようにスレシ
ヨルドレベルを設定しておき、連続性判定回路を
通して判定すれば、着火の検出はきわめて信頼性
の高いものとなる。 By using such a signal processing device, the threshold level is set so that an "H" level signal is generated at the time of ignition, and if the continuity determination circuit is used to determine the ignition, ignition detection is extremely reliable. Become something.
次に本発明の操業方法を具体的に説明する。 Next, the operating method of the present invention will be specifically explained.
主原料の溶銑及びスクラツプを転炉１の炉内に
装入するときは第１図の排ガスフード２は上昇さ
せておき、装入完了後排ガスフードを下降させ、
フード下端のスカート部と転炉炉口金具とを接触
させて、密閉状態にする。 When charging the main raw materials, hot metal and scrap, into the furnace of the converter 1, the exhaust gas hood 2 shown in Fig. 1 is raised, and after charging is completed, the exhaust gas hood is lowered.
The skirt at the lower end of the hood and the converter mouth fitting are brought into contact to create a sealed state.
この状態で吹錬酸素供給用ランス１１を降下、
送酸開始で吹錬がスタートするが、この前に系外
からの空気吸込用スライドゲート５を開にしてお
き、また炉内光検出プローブ８１は、貫通孔７に
挿入しておく。 In this state, lower the blowing oxygen supply lance 11,
Blowing starts with the start of oxygen supply, but before this, the slide gate 5 for sucking air from outside the system is opened, and the in-furnace optical detection probe 81 is inserted into the through hole 7.
吹錬開始後は、前述の信号処理９により着火現
象が確認され、その出力信号により排ガス回収系
シーケンス制御装置１０が作動し、その後のシー
ケンスが開始される。 After the start of blowing, the ignition phenomenon is confirmed by the signal processing 9 described above, and the output signal operates the exhaust gas recovery system sequence control device 10, and the subsequent sequence is started.
この時回収系の安全を確保するため、先ず炉内
から発生するCOは、空気吸引孔４から吸入する
空気中の酸素と完全燃焼させることにより、燃焼
後のガスをCO2及びN2の不活性ガス混合物とな
し、この不活性ガスで回収ダクト３内を置換する
制御を行う。この場合、完全燃焼させるための系
外からの空気の量の制御は空気量調節装置例えば
ゲート５の開度又は吸引ガス制御用ダンパ１２の
何れを使用してもよい。 At this time, in order to ensure the safety of the recovery system, the CO generated from inside the furnace is completely combusted with the oxygen in the air taken in from the air suction hole 4, and the gas after combustion is converted into a non-CO 2 and N 2 gas. Control is performed to replace the inside of the recovery duct 3 with this inert gas. In this case, the amount of air from outside the system for complete combustion may be controlled using an air amount adjusting device such as the opening of the gate 5 or the suction gas control damper 12.
次にこの回収ダクト内の置換状況をガス分析に
よつて確認し、安全性が確保された時点でスライ
ドゲート５を閉とすると共に、炉内発生ガスを未
燃焼状態で回収する制御をダンパ１２を用いて実
施する。 Next, the replacement status in the recovery duct is confirmed by gas analysis, and when safety is ensured, the slide gate 5 is closed, and the damper 12 is controlled to recover the gas generated in the furnace in an unburned state. Implemented using.
上述の吹錬スタートから未燃焼ガス回収開始に
至るシーケンスの例を第４図Ａ、第４図Ｂに、ま
た上記を含む吹錬シーケンスを第５図に示した。 An example of the sequence from the above-mentioned blowing start to the start of unburned gas recovery is shown in FIGS. 4A and 4B, and a blowing sequence including the above is shown in FIG. 5.
発明の効果
以上のごとく本発明の方法によれば、排ガスフ
ードと転炉炉口との間を密着させた状態で吹錬を
スタートさせ、着火を確認できることより、排ガ
スフードの昇降という無駄な操作を省くことがで
きるとともに、吹錬スタート以降炉は密閉状態の
ため、未燃焼ガスが効率的に回収可能になり、熱
回収上非常に有効である。また系外へのガスの噴
出を防止できるため、公害対策・安全対策上もす
ぐれた方法であつて、転炉操業上の価値は極めて
大きい。Effects of the Invention As described above, according to the method of the present invention, blowing can be started with the exhaust gas hood and the converter mouth in close contact and ignition can be confirmed, which eliminates the need for unnecessary operations such as raising and lowering the exhaust gas hood. In addition, since the furnace is sealed after the start of blowing, unburned gas can be efficiently recovered, which is very effective in terms of heat recovery. Furthermore, since it is possible to prevent gas from blowing out of the system, it is an excellent method in terms of pollution control and safety measures, and is extremely valuable in terms of converter operation.
第１図は本法の全体を示す説明図、第２図は信
号処理装置のブロツク図、第３図は信号処理装置
の信号処理状態を示す図、第４図Ａ，Ｂ、は吹錬
スタートから未燃焼ガス回収に至るシーケンスの
例を示す図、第５図は吹錬シーケンスの一例を示
す図である。
１……転炉、２……排ガスフード、３……排ガ
ス回収ダクト、４……空気吸入孔、５……スライ
ドゲート、６……駆動用シリンダ、７……貫通
孔、８１……炉内光検出プローブ、８２……光電
変換装置、９……信号処理装置、１０……排ガス
回収系シーケンス制御装置、１１……ランス、１
２……ダンパ、１３……２値化回路、１４……ピ
ークホールド回路、１５……連続性判定回路。
Fig. 1 is an explanatory diagram showing the entire method, Fig. 2 is a block diagram of the signal processing device, Fig. 3 is a diagram showing the signal processing state of the signal processing device, and Fig. 4 A and B are the start of blowing. FIG. 5 is a diagram showing an example of the sequence from the beginning to the recovery of unburned gas, and FIG. 5 is a diagram showing an example of the blowing sequence. 1...Converter, 2...Exhaust gas hood, 3...Exhaust gas recovery duct, 4...Air suction hole, 5...Slide gate, 6...Drive cylinder, 7...Through hole, 81...Furnace interior Photodetection probe, 82...Photoelectric conversion device, 9...Signal processing device, 10...Exhaust gas recovery system sequence control device, 11...Lance, 1
2... Damper, 13... Binarization circuit, 14... Peak hold circuit, 15... Continuity determination circuit.
Claims (1)
転炉操業方法において、該転炉の側壁に設けられ
た貫通孔に光検出装置を配設し、該検出装置から
の炉内光検出信号から着火を検出し吹錬シーケン
スをすすめることを特徴とする密閉式転炉の操業
方法。1. In a closed converter operation method in which the converter mouth and exhaust gas hood are brought into close contact, a light detection device is installed in a through hole provided in the side wall of the converter, and a light detection signal from the inside of the furnace is detected from the detection device. A method of operating a closed converter characterized by detecting ignition and proceeding with a blowing sequence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59098828A JPS60245711A (en) | 1984-05-18 | 1984-05-18 | Operating method of hermetic converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59098828A JPS60245711A (en) | 1984-05-18 | 1984-05-18 | Operating method of hermetic converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60245711A JPS60245711A (en) | 1985-12-05 |
| JPH0445563B2 true JPH0445563B2 (en) | 1992-07-27 |
Family
ID=14230147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59098828A Granted JPS60245711A (en) | 1984-05-18 | 1984-05-18 | Operating method of hermetic converter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60245711A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111139331B (en) * | 2020-01-14 | 2021-07-06 | 山东钢铁股份有限公司 | Converter blowing combustion-supporting method |
-
1984
- 1984-05-18 JP JP59098828A patent/JPS60245711A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60245711A (en) | 1985-12-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |