JP2709557B2 - How to avoid danger by monitoring converter exhaust gas composition - Google Patents
How to avoid danger by monitoring converter exhaust gas compositionInfo
- Publication number
- JP2709557B2 JP2709557B2 JP5012762A JP1276293A JP2709557B2 JP 2709557 B2 JP2709557 B2 JP 2709557B2 JP 5012762 A JP5012762 A JP 5012762A JP 1276293 A JP1276293 A JP 1276293A JP 2709557 B2 JP2709557 B2 JP 2709557B2
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- composition
- gas
- converter
- explosion
- 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 - Fee Related
Links
Landscapes
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
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 removing dust in a state where the combustion of the CO gas is suppressed, and recovering it as a valuable gas. On the other hand, recovery or effective utilization of the retained heat of the CO gas is also performed. The converter 1 is a furnace in which scrap, hot metal, and auxiliary materials are charged, and are blown with oxygen for refining. 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 collected 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 operation of a converter is performed as follows. First, hot metal produced in a blast furnace (not shown) is injected into the converter 1 (hereinafter referred to as a pig iron receiving step). Next, the space between the converter 1 and the cooler (hood) 3 is restricted, and the oxygen blowing lance 2
Then, pure oxygen and refining gas are blown into the converter 1 from the bottom blowing nozzle 7 (hereinafter, referred to as a blowing process). In the blowing process, the injected pure oxygen reacts with the carbon in the hot metal to generate a high-temperature CO gas, and at the same time, the carbon in the hot metal is removed (decarburization) to perform refining. When the refining is completed, the molten steel is taken out of the converter 1 (hereinafter referred to as a tapping 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, in the converter operation, a series of steps from receiving iron to blowing and tapping is performed, one charge is completed, and the refining is repeated. In this way, the converter operation is performed intermittently, and thus the converter exhaust gas is also generated intermittently.
In the conventional converter exhaust gas monitoring method, an abnormality is only reported when the oxygen or hydrogen concentration exceeds a certain concentration based on the detection results of an 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 change of the composition ratio in order to avoid the danger of explosion due to a hole in 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。[0005] The conventional exhaust gas composition monitoring method performs the concentration of a single gas composition independently, and does not include a system that copes with a change in the explosion region due to the sequential change of a plurality of gas composition ratios. Further, in the conventional control method, there is no avoidance measure from the explosion range, and there is no immediate response means 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, (1) since the explosion was monitored only from the concentration of a single gas, there is a danger of explosion depending on the composition ratio of the flammable gas in the exhaust gas. Nevertheless, there is provided a danger avoidance method that can advantageously solve the problems of the prior art, which do not have a corresponding system, and (2) do not have an avoidance measure 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
ガスの組成を分析し、ＣＯ 2 、ＣＯ、Ｏ 2 、Ｎ 2 、Ｈ 2
の組成比率によって爆発範囲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. (1) In a converter exhaust gas treatment apparatus configured to cool and remove exhaust gas generated from a converter and collect the exhaust gas, the composition of the exhaust gas during blowing is analyzed , and CO 2 , CO, O 2 , N 2 , and H 2 are analyzed.
A method for avoiding danger by monitoring the composition of converter exhaust gas, which detects that the explosion range has been reached , based on the composition ratio .
【０００８】（２） 吹錬中の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
させるため、不活性ガスを冷却器内に導入するように回
避制御を行うことを特徴とする前記（１）記載の転炉排
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) When the composition of the exhaust gas during blowing falls within the explosion range , an inert gas is introduced into the cooler so that the composition of the exhaust gas immediately departs from the explosion range. The danger avoidance method by monitoring the composition of the converter exhaust gas according to the above (1), wherein the evacuation control is performed. Hereinafter, the present invention will be described 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 materials are charged and oxygen is blown to refine the converter. The high-temperature CO gas (about 1500 ° C.) generated from the converter 1 is supplied to the induction blower 5
After being drawn into the cooler 3 by the dust removers 9 and 10, the dust is collected by the gas holder 8 as valuable gas. When the composition of the exhaust gas falls within the explosion range during blowing, the exhaust gas composition is released from the explosion range by introducing an inert gas from the purge gas device 13 into the cooler 3. This makes it possible to control the composition of the exhaust gas, which could not be controlled conventionally.
【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 by a monitor in the central control room.
It shows the exhaust gas composition information to be performed. Display is C
O, COTwo, OTwo, NTwo, HTwoOf exhaust gas composition consisting of
The vertical axis 15 is the CO concentration, and the horizontal axis 16 is
COTwo+ NTwoConcentration, axis 18 is OTwoIndicates the concentration. Exhaustion
H in gas compositionTwoExplosion if concentration is not included
The range is within the range surrounded by the compositions 19, 20, 21, and 22.
However, the H TwoComposition 21, 22 depending on concentration
From 23 to 24, and 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, the converter exhaust gas is assumed to be 100% CO in the design of the gas cooling section, and 10% of the maximum exhaust gas is partially burned by invading air. Therefore, the gas composition of the cooling section is CO, C
The explosion range is set as a ternary system of O 2 , N 2 , and H 2 . However, since both CO 2 and N 2 are inert gases, they are indicated 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。By providing an alarm zone in addition to the explosion range indicated above, it is predicted that the gas composition during blowing will gradually change. Compositions 25, 26, 21 (or 23), 22
The area surrounded by (or 24) is an alarm area. Table 1 shows specific examples of the composition ratios 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 is a monitor of a change 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 the blowing shifts in the direction of arrow 27 due to an increase in CO generated by the reaction between the carbon in the hot metal and oxygen supplied from the lance 2. FIG.
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 (dangerous zone), the explosion range is avoided by introducing an inert gas into the cooling pipe.
【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) Explosion monitoring, which was performed only from the concentration of a single gas in exhaust gas monitoring during converter blowing, calculates the theoretical explosion range based on the ratio of several types of gas compositions, automates monitoring, and visualizes changes in composition by monitoring. Was made possible. This has made it possible to detect gas explosions caused by equipment troubles during operation. (2) When the composition of the exhaust gas falls within the explosion range, the composition of the exhaust gas can be released from the explosion range by introducing an 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 view showing an embodiment of 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 monitoring changes in gas composition during actual blowing.
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 DESCRIPTION OF SYMBOLS 1 Converter 2 Lance 3 Cooler 4 Furnace analyzer 5 Exhaust gas induction blower 6 Chimney 7 Bottom blowing nozzle 8 Gas holder 9, 10 Deduster 11, 12 Gas concentration measuring device 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
中の排ガスの組成を分析し、ＣＯ 2 、ＣＯ、Ｏ 2 、
Ｎ 2 、Ｈ 2 の組成比率によって爆発範囲に達したことを
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。In a converter exhaust gas treatment apparatus configured to cool and remove exhaust gas generated from a converter and collect the exhaust gas, the composition of the exhaust gas during blowing is analyzed , and CO 2 , CO, O 2 ,
A method for avoiding danger by monitoring exhaust gas composition of a converter , wherein the explosion range is detected based on the composition ratio of N 2 and H 2 .
場合には、直ちに排ガス組成を爆発範囲から離脱させる
ため、不活性ガスを冷却器内に導入するように回避制御
を行うことを特徴とする請求項１記載の転炉排ガス組成
監視による危険回避方法。2. If the composition of the exhaust gas during blowing falls into the explosion range, the composition of the exhaust gas is immediately released from the explosion range.
2. The method of claim 1 , wherein the avoidance control is performed so that an inert gas is introduced into the cooler .
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 JPH06220515A (en) | 1994-08-09 |
| JP2709557B2 true 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) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107099638A (en) * | 2017-05-19 | 2017-08-29 | 山东钢铁股份有限公司 | It is a kind of to prevent dry method dust converter from opening to be blown off quick-fried control method |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3422021A1 (en) * | 1984-06-14 | 1985-12-19 | Drägerwerk AG, 2400 Lübeck | 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 |
-
1993
- 1993-01-28 JP JP5012762A patent/JP2709557B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107099638A (en) * | 2017-05-19 | 2017-08-29 | 山东钢铁股份有限公司 | It is a kind of to prevent dry method dust converter from opening to be blown off quick-fried control method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06220515A (en) | 1994-08-09 |
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