JPH06220515A - Method for avoiding danger by observing exhaust gas composition in converter - Google Patents
Method for avoiding danger by observing exhaust gas composition in converterInfo
- Publication number
- JPH06220515A JPH06220515A JP5012762A JP1276293A JPH06220515A JP H06220515 A JPH06220515 A JP H06220515A JP 5012762 A JP5012762 A JP 5012762A JP 1276293 A JP1276293 A JP 1276293A JP H06220515 A JPH06220515 A JP H06220515A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- converter
- composition
- gas
- gas composition
- 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
Landscapes
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
(57)【要約】
【目的】 本発明は、転炉排ガス組成監視による危険回
避方法に関するもので、特に爆発の危険回避を図ること
を目的とする。
【構成】 吹錬中の排ガスの組成を分析することで可燃
域に達したことを検知することを特徴とする。
(57) [Summary] [Object] The present invention relates to a method for avoiding danger by monitoring the composition of exhaust gas from a converter, and particularly aims to avoid the risk of explosion. [Composition] It is characterized in that the composition reaches a flammable range by analyzing the composition of the exhaust gas during blowing.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、転炉吹錬中に発生する
排ガス組成を検知し、爆発の危険性を判断し、爆発の危
険が生じた場合には回避制御を行う危険回避方法に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a danger avoidance method for detecting the composition of exhaust gas generated during blowing of a converter, judging the danger of explosion, and performing avoidance control when the danger of explosion occurs. .
【０００２】[0002]
【従来の技術】転炉からは高温のＣＯガスが大量に発生
する。転炉排ガス処理装置は、このＣＯガスの燃焼を抑
えた状態で冷却除塵して有価ガスとして回収するための
装置である。又、一方において、上記ＣＯガスの保有熱
の回収又は有効利用も行われる。転炉１は、スクラッ
プ、溶銑、副原料を入れ、酸素を吹き付けて精錬する炉
である。転炉１から発生した高温のＣＯガス（約１５０
０℃）は誘導送風機５によって冷却器３内に誘引され、
除塵器９、１０によって除塵された後、ガスホルダー８
に有価ガスとして回収される。2. Description of the Related Art A large amount of high temperature CO gas is generated from a converter. The converter exhaust gas treatment device is a device for cooling and dust-removing the CO gas in a state where the combustion of the CO gas is suppressed and recovering it as valuable gas. On the other hand, on the other hand, the retained heat of the CO gas is also recovered or effectively utilized. The converter 1 is a furnace in which scrap, hot metal, and auxiliary raw materials are charged and oxygen is blown to refine. High-temperature CO gas generated from the converter 1 (about 150
0 ° C.) is drawn into the cooler 3 by the induction blower 5,
After the dust is removed by the dust removers 9 and 10, the gas holder 8
Is recovered as valuable gas.
【０００３】一方転炉操業は、次のようにして行われ
る。先ず図示省略の高炉で生産された溶銑は転炉１内に
注入される（以下受銑工程という）。次に転炉１と冷却
器（フード）３との間を制限し、酸素吹き込みランス２
及び底吹ノズル７より転炉１内へ純酸素及び精錬ガスを
吹き込む（以下吹錬工程という）。この吹錬工程におい
て、吹き込まれた純酸素と溶銑中の炭素とが反応して高
温のＣＯガスが発生すると同時に、溶銑中の炭素が取り
除かれ（脱炭）精錬が行われる。この精錬が完了すると
次に転炉１からその溶鋼を取り出す（以下出鋼工程とい
う）。On the other hand, the converter operation is performed as follows. First, the molten pig iron produced in a blast furnace (not shown) is injected into the converter 1 (hereinafter referred to as the pig iron receiving step). Next, the space between the converter 1 and the cooler (hood) 3 is restricted, and the oxygen blowing lance 2
And, pure oxygen and refining gas are blown into the converter 1 from the bottom blowing nozzle 7 (hereinafter referred to as blowing step). In this blowing step, the injected pure oxygen reacts with the carbon in the hot metal to generate high-temperature CO gas, and at the same time, the carbon in the hot metal is removed (decarburization) refining. When this refining is completed, the molten steel is taken out from the converter 1 (hereinafter referred to as the steel output step).
【０００４】このように転炉作業は、受銑→吹錬→出鋼
の一連の工程が行われて１チャージが完了し、次の精錬
へと繰り返し行われる。このようにして、転炉操業は間
歇的に行われ、従って転炉排ガスも間歇的に発生する。
従来の転炉排ガス監視方法は、炉頂及び排ガス誘導送風
機近傍に設置された排ガス分析計の検出結果より酸素又
は水素濃度が一定濃度以上になった場合に異常が知らさ
れるのみであった。排ガス組成において酸素、水素、Ｃ
Ｏガスといった可燃性ガス組成比によっては爆発の恐れ
がある。特に排ガス回収装置の破孔、及び煙道内の閉塞
などによる爆発の危険を避けるために組成比の推移を監
視することは操業管理において必須である。As described above, the converter operation is carried out by repeating a series of steps of pig iron → blowing → steeling, one charge is completed, and the next refining is repeated. In this way, the converter operation is performed intermittently, and therefore the converter exhaust gas is also generated intermittently.
In the conventional converter exhaust gas monitoring method, an abnormality is only notified when the oxygen or hydrogen concentration exceeds a certain concentration based on the detection results of the exhaust gas analyzer installed near the furnace top and the exhaust gas induction blower. Oxygen, hydrogen, C in exhaust gas composition
There is a risk of explosion depending on the composition ratio of flammable gas such as O gas. In particular, it is essential in operation management to monitor the transition of the composition ratio in order to avoid the risk of explosion due to rupture of the exhaust gas recovery device and blockage in the flue.
【０００５】従来の排ガス組成監視方法は単一ガス組成
の濃度を単独に行うものであり、複数のガス組成比が逐
次変化することによる爆発領域が変化することに対応し
たシステムを備えていない。また、従来の制御方法にお
いては、爆発範囲からの回避措置がなく、診断結果によ
る即時対応の手段がなかった。The conventional exhaust gas composition monitoring method is for independently performing the concentration of a single gas composition, and does not have a system corresponding to the change of the explosion region due to the successive change of a plurality of gas composition ratios. Moreover, in the conventional control method, there is no avoidance measure from the explosion range, and there is no means for immediate response based on the diagnosis result.
【０００６】[0006]
【発明が解決しようとする課題】本発明は、（１）単一
気体の濃度からのみ爆発監視を行っていたので、排ガス
中の可燃性ガスの組成比によっては爆発の危険性がある
にも拘わらず、これに対応するシステムを備えていな
い、（２）排ガス組成が爆発範囲内に入った場合の回避
措置を持たない、という従来技術の課題を有利に解決し
得る危険回避方法を提供することを目的とする。According to the present invention, since (1) the explosion is monitored only from the concentration of a single gas, there is a risk of explosion depending on the composition ratio of the combustible gas in the exhaust gas. Nevertheless, there is provided a risk avoidance method capable of advantageously solving the problems of the prior art, which are not equipped with a system corresponding thereto, and (2) have no avoidance measures when the exhaust gas composition falls within the explosion range. The purpose is to
【０００７】[0007]
【課題を解決するための手段】本発明の要旨とするとこ
ろは下記のとおりである。 （１） 転炉から発生する排ガスを冷却除塵して回収す
るようにした転炉排ガス処理装置において、吹錬中の排
ガスの組成（主成分をＣＯ2 、ＣＯ、Ｏ2 、Ｎ 2 、Ｈ2
とする）を分析することで可燃域に達したことを検知す
ることを特徴とする転炉排ガス組成監視による危険回避
方法。The gist of the present invention is as follows.
The items are as follows. (1) Cooling and dust removal of exhaust gas generated from the converter
In the converter exhaust gas treatment device designed to
Gas composition (main component is CO2, CO, O2, N 2, H2
It is detected that the flammable range has been reached by analyzing
Avoiding hazards by monitoring converter exhaust gas composition characterized by
Method.
【０００８】（２） 排ガス組成が爆発範囲に入った場
合には、直ちに排ガス組成を爆発範囲から離脱させる回
避制御を行うことを特徴とする転炉排ガス組成監視によ
る危険回避方法。 以下、図面に基づいて本発明を説明する。図１は本発明
による実施例を示す図である。(2) A method for avoiding danger by monitoring converter exhaust gas composition, characterized in that when the exhaust gas composition enters the explosion range, the avoidance control is carried out to immediately remove the exhaust gas composition from the explosion range. The present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an embodiment according to the present invention.
【０００９】転炉１は、スクラップ、溶銑、副原料を入
れ、酸素を吹き付けて精錬する炉である。転炉１から発
生した高温のＣＯガス（約１５００℃）は誘導送風機５
によって冷却器３内に誘引され、除塵器９、１０によっ
て除塵された後、ガスホルダー８に有価ガスとして回収
される。吹錬中に排ガス組成が爆発範囲内に入った場合
には不活性ガスをパージガス装置１３から冷却器３内に
導入することにより排ガス組成を爆発範囲から離脱させ
る。これによって従来制御不可能であった排ガスの組成
制御が可能となった。The converter 1 is a furnace in which scrap, hot metal, and auxiliary raw materials are charged, and oxygen is blown to smelt. The high temperature CO gas (about 1500 ° C.) generated from the converter 1 is an induction blower 5
Is attracted into the cooler 3 by the dust remover 9, and dust is removed by the dust removers 9 and 10 and then collected as valuable gas in the gas holder 8. When the exhaust gas composition enters the explosive range during blowing, an inert gas is introduced from the purge gas device 13 into the cooler 3 to separate the exhaust gas composition from the explosive range. This has made it possible to control the composition of exhaust gas, which was previously uncontrollable.
【００１０】図２は中央操作室のモニターによって表示
される排ガス組成情報を示したものである。表示はＣ
Ｏ、ＣＯ2 、Ｏ2 、Ｎ2 、Ｈ2 からなる排ガス組成を図
表化したものであり、縦軸１５はＣＯ濃度、横軸１６は
ＣＯ2 ＋Ｎ2 濃度を示し、軸１８はＯ2 濃度を示す。排
ガス組成中にＨ2 濃度が含まれない場合においては爆発
範囲は組成１９、２０、２１、２２で囲まれた範囲内で
あるが、排ガス組成のＨ 2 濃度によって組成２１、２２
から２３、２４へシフトし、範囲が拡大する。FIG. 2 is displayed on the monitor in the central operation room.
It shows the exhaust gas composition information to be generated. The display is C
O, CO2, O2, N2, H2Figure of exhaust gas composition consisting of
It is tabulated, the vertical axis 15 is the CO concentration, and the horizontal axis 16 is
CO2+ N2Concentration is shown, axis 18 is O2Indicates the concentration. Elimination
H in the gas composition2Explosion if concentration is not included
The range is within the range surrounded by composition 19, 20, 21, 22
However, H of exhaust gas composition 2Composition 21,22 depending on concentration
From 23 to 24, the range is expanded.
【００１１】非燃焼型排ガス回収設備においては、ガス
冷却部の設計において転炉排ガスはＣＯを１００％と仮
定し、最高排ガス発生に対し、その１０％が侵入空気に
より部分燃焼する。従って冷却部のガス組成はＣＯ、Ｃ
Ｏ2 、Ｎ2 、Ｈ2 の５元系として、爆発範囲を設定す
る。但し、ＣＯ2 、Ｎ2 は両者とも不活性ガスであるた
めＣＯ、（ＣＯ2 −Ｎ2 ）、Ｏ2 、Ｈ2 の４元系として
表示する。In the non-combustion type exhaust gas recovery equipment, CO in the converter exhaust gas is assumed to be 100% in the design of the gas cooling unit, and 10% of the maximum exhaust gas is partially combusted by the invading air. Therefore, the gas composition of the cooling unit is CO, C
The explosion range is set as a five-element system of O 2 , N 2 and H 2 . However, since CO 2 and N 2 are both inert gases, they are represented as a quaternary system of CO, (CO 2 —N 2 ), O 2 and H 2 .
【００１２】上記にて示された爆発範囲に加えて警報域
を設けることで吹錬中のガス組成が序々に変化すること
を予測する。組成２５、２６、２１（又は２３）、２２
（又は２４）で囲まれた範囲は警報区域である。表１は
ＣＯ、ＣＯ2 、Ｏ2 、Ｎ2 、Ｈ2 の組成比の具体例を示
したものである。It is expected that the gas composition during blowing will gradually change by providing an alarm zone in addition to the explosion range shown above. Composition 25, 26, 21 (or 23), 22
The area surrounded by (or 24) is an alarm area. Table 1 shows specific examples of the composition ratio of CO, CO 2 , O 2 , N 2 , and H 2 .
【００１３】[0013]
【表１】 [Table 1]
【００１４】図３は実際の吹錬中のガス組成変化をモニ
ターしたものである（図２の拡大図）。吹錬開始により
発生する排ガス組成は溶銑中の炭素とランス２より与え
られる酸素との反応により発生するＣＯの増加によって
矢印２７の方向へ移行していくことが検知される。図２
及び図３を常時システム監視することによって排ガス組
成監視を行い、爆発範囲（危険区域）に排ガス組成が入
った場合には不活性ガスを冷却管内に導入することによ
り爆発範囲を回避する。FIG. 3 shows changes in gas composition during actual blowing (enlarged view of FIG. 2). It is detected that the composition of the exhaust gas generated by the start of blowing shifts in the direction of arrow 27 due to the increase of CO generated by the reaction between the carbon in the hot metal and the oxygen given from the lance 2. Figure 2
Also, the exhaust gas composition is monitored by constantly monitoring the system in FIG. 3, and when the exhaust gas composition enters the explosion range (hazardous area), an inert gas is introduced into the cooling pipe to avoid the explosion range.
【００１５】[0015]
（１）転炉吹錬中の排ガス監視において単一気体の濃度
からのみ行っていた爆発監視を数種類の気体組成の比率
をもって理論爆発範囲を計算し、監視の自動化及びモニ
ターによる組成の変化の可視化を可能とした。これによ
って操業中に起こる設備トラブルからのガス爆発を未然
に検知することが可能となった。 （２）排ガス組成が爆発範囲内に入った場合には、パー
ジガス装置１３から不活性ガスを冷却器３内に導入する
ことにより排ガス組成を爆発範囲から離脱させることが
可能となった。(1) The theoretical explosion range was calculated from the ratio of several gas compositions for the explosion monitoring, which was performed only from the concentration of a single gas in the exhaust gas monitoring during converter blowing, and the monitoring was automated and the change in composition was visualized by the monitor. Made possible. This makes it possible to detect gas explosions due to equipment troubles that occur during operation. (2) When the exhaust gas composition enters the explosive range, it becomes possible to remove the exhaust gas composition from the explosive range by introducing the inert gas from the purge gas device 13 into the cooler 3.
【図１】本発明の実施装置を示す説明図である。FIG. 1 is an explanatory diagram showing a device for carrying out the present invention.
【図２】中央操作室のモニターによって表示される排ガ
ス組成を図表化した図である。FIG. 2 is a diagram illustrating the exhaust gas composition displayed by a monitor in a central operation room.
【図３】実際の吹錬中のガス組成変化をモニターした図
である。FIG. 3 is a diagram in which changes in gas composition during actual blowing are monitored.
１ 転炉 ２ ランス ３ 冷却器 ４ 炉頂分析計 ５ 排ガス誘導送風機 ６ 煙突 ７ 底吹ノズル ８ ガスホルダー ９、１０ 除塵器 １１、１２ ガス濃度測定器 １３ パージガス装置 1 converter 2 lance 3 cooler 4 furnace top analyzer 5 exhaust gas induction blower 6 chimney 7 bottom blowing nozzle 8 gas holder 9, 10 dust remover 11, 12 gas concentration measuring instrument 13 purge gas device
Claims (2)
回収するようにした転炉排ガス処理装置において、吹錬
中の排ガスの組成（主成分をＣＯ2 、ＣＯ、Ｏ2 、
Ｎ2 、Ｈ2 とする）を分析することで可燃域に達したこ
とを検知することを特徴とする転炉排ガス組成監視によ
る危険回避方法。1. A converter exhaust gas treatment apparatus for cooling and removing dust from exhaust gas generated from a converter, wherein the composition of exhaust gas during blowing (main components are CO 2 , CO, O 2 ,
A method for avoiding danger by monitoring the composition of exhaust gas from a converter, which comprises detecting that a flammable region has been reached by analyzing N 2 and H 2 .
は、直ちに排ガス組成を爆発範囲から離脱させる回避制
御を行うことを特徴とする転炉排ガス組成監視による危
険回避方法。2. A risk avoidance method by monitoring a converter exhaust gas composition, wherein when the exhaust gas composition enters the explosion range, an avoidance control for immediately separating the exhaust gas composition from the explosion range is performed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5012762A JP2709557B2 (en) | 1993-01-28 | 1993-01-28 | How to avoid danger by monitoring converter exhaust gas composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5012762A JP2709557B2 (en) | 1993-01-28 | 1993-01-28 | How to avoid danger by monitoring converter exhaust gas composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06220515A true JPH06220515A (en) | 1994-08-09 |
| JP2709557B2 JP2709557B2 (en) | 1998-02-04 |
Family
ID=11814415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5012762A Expired - Fee Related JP2709557B2 (en) | 1993-01-28 | 1993-01-28 | How to avoid danger by monitoring converter exhaust gas composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2709557B2 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112195302A (en) * | 2020-10-16 | 2021-01-08 | 中冶赛迪技术研究中心有限公司 | Method and device for predicting electric precipitation explosion risk of primary flue gas of converter |
| CN112553396A (en) * | 2020-10-27 | 2021-03-26 | 广东韶钢松山股份有限公司 | Converter ignition method for preventing explosion venting of dry dedusting system |
| CN115558740A (en) * | 2021-07-02 | 2023-01-03 | 北京博谦工程技术有限公司 | Explosion-proof early warning judgment method in intelligent diagnosis system |
| JP2024058025A (en) * | 2022-10-14 | 2024-04-25 | 日本スピンドル製造株式会社 | Dust Collection System |
| CN118957198A (en) * | 2024-07-08 | 2024-11-15 | 包头钢铁（集团）有限责任公司 | A method for preventing explosion from occurring when using dust briquetting in a converter |
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| CN107099638B (en) * | 2017-05-19 | 2019-01-08 | 山东钢铁股份有限公司 | It is a kind of to prevent from dry method dust converter from opening being blown off quick-fried control method |
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|---|---|---|---|---|
| JPS6110005A (en) * | 1984-06-14 | 1986-01-17 | ドレーゲルヴエルク・アクチエンゲゼルシヤフト | Chemical oxygen generator |
| JPS6220248A (en) * | 1985-07-18 | 1987-01-28 | Hitachi Maxell Ltd | Nonaqueous electrolyte secondary battery |
| JPS6220251A (en) * | 1985-07-19 | 1987-01-28 | Showa Denko Kk | Secondary battery |
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1993
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6110005A (en) * | 1984-06-14 | 1986-01-17 | ドレーゲルヴエルク・アクチエンゲゼルシヤフト | Chemical oxygen generator |
| JPS6220248A (en) * | 1985-07-18 | 1987-01-28 | Hitachi Maxell Ltd | Nonaqueous electrolyte secondary battery |
| JPS6220251A (en) * | 1985-07-19 | 1987-01-28 | Showa Denko Kk | Secondary battery |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112195302A (en) * | 2020-10-16 | 2021-01-08 | 中冶赛迪技术研究中心有限公司 | Method and device for predicting electric precipitation explosion risk of primary flue gas of converter |
| CN112195302B (en) * | 2020-10-16 | 2023-05-12 | 中冶赛迪技术研究中心有限公司 | Method and device for predicting primary flue gas electric dust removal explosion risk of converter |
| CN112553396A (en) * | 2020-10-27 | 2021-03-26 | 广东韶钢松山股份有限公司 | Converter ignition method for preventing explosion venting of dry dedusting system |
| CN115558740A (en) * | 2021-07-02 | 2023-01-03 | 北京博谦工程技术有限公司 | Explosion-proof early warning judgment method in intelligent diagnosis system |
| JP2024058025A (en) * | 2022-10-14 | 2024-04-25 | 日本スピンドル製造株式会社 | Dust Collection System |
| CN118957198A (en) * | 2024-07-08 | 2024-11-15 | 包头钢铁（集团）有限责任公司 | A method for preventing explosion from occurring when using dust briquetting in a converter |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2709557B2 (en) | 1998-02-04 |
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