JP2540687B2 - Converter gas recovery method - Google Patents
Converter gas recovery methodInfo
- Publication number
- JP2540687B2 JP2540687B2 JP4014499A JP1449992A JP2540687B2 JP 2540687 B2 JP2540687 B2 JP 2540687B2 JP 4014499 A JP4014499 A JP 4014499A JP 1449992 A JP1449992 A JP 1449992A JP 2540687 B2 JP2540687 B2 JP 2540687B2
- Authority
- JP
- Japan
- Prior art keywords
- recovery
- converter gas
- oxygen concentration
- gas recovery
- induction fan
- 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
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Description
【発明の詳細な説明】Detailed Description of the Invention
【０００１】[0001]
【産業上の利用分野】本発明は、製鋼精錬時に発生する
転炉ガスを高効率で回収する方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for highly efficiently recovering converter gas generated during steelmaking refining.
【０００２】[0002]
【従来の技術】転炉精錬時に発生する転炉ガスは、高濃
度の一酸化炭素を含むガスであり燃料として用いられ
る。これをできる限り高効率で回収することによりエネ
ルギーコストを削減することが期待されている。このた
め従来から転炉ガス回収効率を向上させるべく工夫がさ
れてきた。しかし回収条件として、ホルダーに近い誘引
ファン下流側の酸素濃度が一定値以下の条件が必要であ
り、当該酸素濃度一定値以下を含む全ての回収条件が整
った後にまず回収弁を開け、しかる後に三方弁を回収側
としてガス回収を行っていた。2. Description of the Related Art A converter gas generated during converter refining is a gas containing a high concentration of carbon monoxide and used as a fuel. Energy costs are expected to be reduced by recovering this as efficiently as possible. For this reason, measures have been conventionally taken to improve the converter gas recovery efficiency. However, as the recovery condition, it is necessary that the oxygen concentration on the downstream side of the induction fan close to the holder is equal to or lower than a certain value.After all the collection conditions including the oxygen concentration below the certain value are satisfied, first open the recovery valve and then Gas was collected with the three-way valve as the collection side.
【０００３】[0003]
【発明が解決しようとする課題】しかし、転炉ガス回収
条件を全て満たした時回収を行う際に、まず転炉ガスダ
クト下流側の回収弁を開としホルダーへの通路を確保し
た上で回収弁の上流側にある三方弁を放散側から回収側
とする必要がある。このため回収弁の開動作時間の間、
回収可能なガスを放散しているのが現状である。本発明
は、この間放散されているガスを回収することにより転
炉ガス回収効率を向上させようとするものである。However, when performing recovery when all the converter gas recovery conditions are satisfied, first the recovery valve on the downstream side of the converter gas duct is opened to secure a passage to the holder, and then the recovery valve. It is necessary to change the three-way valve on the upstream side from the diffusion side to the recovery side. Therefore, during the opening time of the recovery valve,
The present situation is that it recovers recoverable gas. The present invention is intended to improve the converter gas recovery efficiency by recovering the gas that is being diffused during this period.
【０００４】[0004]
【課題を解決するための手段】回収条件を判断するため
の転炉ガスの成分は、ホルダーに近い誘引ファン下流側
の成分を用いる必要がある。今回、転炉ガスダクトの炉
頂部に設けた酸素分析計の値が一定値となり、誘引ファ
ン下流側の酸素濃度が未だ回収条件とならない状況にお
いて、予め回収弁の開指令を出し回収弁を開としてお
く。この時、誘引ファン下流側の酸素濃度一定値以下以
外の回収条件は成立しているものとする。しかる後に、
誘引ファン下流側の酸素濃度一定値以下の条件が成立次
第、三方弁を回収側とすることにより転炉ガス回収を高
効率で行う。[Means for Solving the Problems] As a component of the converter gas for judging the recovery condition, it is necessary to use a component on the downstream side of the induction fan close to the holder. This time, when the value of the oxygen analyzer installed at the furnace top of the converter gas duct becomes a constant value and the oxygen concentration on the downstream side of the induction fan does not yet become the recovery condition, a recovery valve open command is issued in advance to open the recovery valve. deep. At this time, it is assumed that the recovery conditions other than the fixed value of the oxygen concentration on the downstream side of the induction fan are satisfied. After that,
As soon as the condition that the oxygen concentration on the downstream side of the induction fan is less than a certain value is satisfied, the converter gas is recovered with high efficiency by setting the three-way valve on the recovery side.
【０００５】[0005]
【作用】従来の回収制御においては、誘引ファン下流側
の酸素濃度一定値以下を含む全ての回収条件が成立して
から、回収弁開動作、三方弁回収側動作が終了するまで
約３０秒を要していた。本発明では、転炉ガスダクト炉
頂部の酸素濃度一定値以下の条件により予め回収弁開指
令を出し、開動作を開始しておくので、炉頂部の低酸素
濃度のガスが誘引ファン下流側に到達し、三方弁回収側
指令を出す時には、既に回収弁は回収側となっている。
このため、全回収条件が成立してから三方弁回収側動作
が終了するまでの時間は三方弁の動作時間約１０秒のみ
となる。これにより約２０秒間の転炉ガス回収増が得ら
れる。これは、約２Ｎｍ3 ／ＴＯＮの転炉ガス回収量増
加効果がある。In the conventional recovery control, it takes about 30 seconds from the satisfaction of all the recovery conditions including the oxygen concentration constant value on the downstream side of the induction fan to the completion of the recovery valve opening operation and the three-way valve recovery side operation. I needed it. In the present invention, the recovery valve opening command is issued in advance under the condition that the oxygen concentration of the converter gas duct at the top of the furnace is equal to or lower than a certain value, and the opening operation is started. However, when the three-way valve recovery side command is issued, the recovery valve is already on the recovery side.
Therefore, the time from the satisfaction of all the recovery conditions to the end of the three-way valve recovery side operation is only about 10 seconds of the operation time of the three-way valve. This provides a converter gas recovery increase of about 20 seconds. This has the effect of increasing the converter gas recovery amount of about 2 Nm 3 / TON.
【０００６】[0006]
【実施例】図１に示すように、転炉１、転炉ガスダクト
炉頂部の酸素濃度計Ａｌ及び誘引ファン４下流側の酸素
濃度計Ａ２、さらに下流側に放散用の三方弁５及び回収
弁６、ホルダー７を有する。そこで、転炉１から発生す
る転炉ガスは、冷却機２、集塵機３を通過して、誘引フ
ァン４によるホルダー７側に送られる。吹錬開始時は、
三方弁５が、放散側となっておりフレアスタック８より
放出されている。回収時には、回収弁６を開とし、ホル
ダー７への通路を確保した上で三方弁５を回収側とする
ことによりガスを回収するように構成されている。而し
て吹錬開始時に転炉１から発生するガスは、ＣＯ濃度が
上昇、酸素濃度が下降するが、通常可燃性でありかつ酸
素濃度の低いガスのみ回収する必要がある。本発明で
は、酸素濃度計Ａｌの値が低下した時点で予め回収弁６
を開しておき、その動作時間分のガス回収増を図るもの
である。EXAMPLES As shown in FIG. 1, a converter 1, an oxygen concentration meter Al at the top of a converter gas duct and an oxygen concentration meter A2 at the downstream side of an induction fan 4, and a three-way valve 5 for recovery and a recovery valve at the further downstream side. 6, having a holder 7. Therefore, the converter gas generated from the converter 1 passes through the cooler 2 and the dust collector 3 and is sent to the holder 7 side by the induction fan 4. At the start of blowing,
The three-way valve 5 is on the diffusion side and is emitted from the flare stack 8. At the time of recovery, the recovery valve 6 is opened, a passage to the holder 7 is secured, and then the three-way valve 5 is set on the recovery side to recover the gas. Thus, in the gas generated from the converter 1 at the start of blowing, the CO concentration rises and the oxygen concentration falls, but it is usually necessary to collect only the flammable gas having a low oxygen concentration. In the present invention, the recovery valve 6 is previously set when the value of the oxygen concentration meter Al decreases.
Is opened to increase the gas recovery for the operating time.
【０００７】そこで、転炉ガス回収の条件としてＣＯ濃
度一定値（Ｃ１）以上および、酸素濃度一定値（Ｌ１）
以下を設け、その他設備上の必要条件とともに満たされ
た時点で自動的に回収を行う。ここで設備上の必要条件
としては下表（表１）に示すものがある。通常は、上記
設備上の諸条件及びＣＯ濃度一定値（Ｃ１）以上の条件
が成立してもなお酸素濃度一定値（Ｌ１）以下の条件が
満たされずに酸素濃度一定値（Ｌ１）以下の条件が最後
に成立する。しかし、転炉炉頂部にある酸素濃度計Ａ１
の酸素濃度は、早い時期に低下を開始しておりその濃度
一定値（Ｌ２）以下をもって回収弁６の開動作を開始し
ておく。酸素濃度の低下したガスが酸素濃度計Ａ２に到
達する時には既に回収弁６は開となっており、三方弁５
を回収側とするのみで回収が可能となる。これにより、
回収弁６の動作時間（２０秒）分のガスを回収すること
ができる。設定値Ｌ１，Ｌ２は、独立に決めることがで
きる。現在、Ｌ１、Ｌ２いずれも酸素、ＣＯの爆発限界
である５．５％以下の値としている。そのフローの例を
図２に示す。Therefore, as a condition for the converter gas recovery, a constant CO concentration value (C1) or more and a constant oxygen concentration value (L1) are used.
The following will be provided, and collection will be carried out automatically when they are satisfied together with other equipment requirements. Here, the necessary conditions on the equipment include those shown in the following table (Table 1). Normally, even if the above-mentioned various conditions on the equipment and the condition of the CO concentration constant value (C1) or more are satisfied, the condition of the oxygen concentration constant value (L1) or less is not satisfied, and the oxygen concentration constant value (L1) or less is satisfied. Is finally established. However, the oxygen concentration meter A1 at the top of the converter furnace
The oxygen concentration of 1 starts to decrease at an early stage, and the opening operation of the recovery valve 6 is started when the concentration is equal to or less than the constant value (L2). The recovery valve 6 is already open when the gas with reduced oxygen concentration reaches the oxygen concentration meter A2, and the three-way valve 5
It is possible to collect only by making the collection side. This allows
It is possible to recover the gas for the operation time (20 seconds) of the recovery valve 6. The set values L1 and L2 can be independently determined. Currently, both L1 and L2 are set to a value of 5.5% or less, which is the explosion limit of oxygen and CO. An example of the flow is shown in FIG.
【０００８】[0008]
【表１】 [Table 1]
【０００９】[0009]
【表２】 [Table 2]
【００１０】[0010]
【発明の効果】以上述べたように、本発明を実施するこ
とにより表２に示すように、放散量平均を極めて少くす
ることが出来、転炉ガス回収効率を向上させる工業的効
果は大きい。As described above, by carrying out the present invention, as shown in Table 2, the average emission amount can be made extremely small, and the industrial effect of improving the converter gas recovery efficiency is great.
【図１】本発明に係る転炉から発生する転炉ガス回収装
置を示す図。FIG. 1 is a diagram showing a converter gas recovery device generated from a converter according to the present invention.
【図２】本発明に係る操業フローの例を示す工程図であ
る。FIG. 2 is a process chart showing an example of an operation flow according to the present invention.
１ 転炉 ２ 冷却機 ３ 集塵機 ４ 誘引ファン ５ 三方弁 ６ 回収弁 ７ ホルダー ８ フレアスタック Ａ1 ，Ａ2 酸素濃度計1 Converter 2 Cooler 3 Dust collector 4 Induction fan 5 Three-way valve 6 Recovery valve 7 Holder 8 Flare stack A 1 , A 2 Oxygen concentration meter
Claims (1)
の転炉ガスダクトに誘引ファン側から三方弁、回収弁を
持つ転炉ガス回収設備において、転炉ガスダクトの炉頂
部にひとつ及び誘引ファン下流側かつ三方弁の上流側に
もうひとつのガス中酸素濃度分析計を設け、転炉ガス回
収条件の一部として誘引ファン下流側の酸素濃度一定値
（Ｌ１）以下を用い、誘引ファン下流側酸素濃度一定値
（Ｌ１）以下以外の転炉ガス回収条件成立かつ炉頂部の
酸素濃度一定値（Ｌ２）以下が成立した時、転炉ガス回
収弁のみ開指令を出し、誘引ファン下流側の酸素濃度一
定値（Ｌ１）以下を含む全ての転炉ガス回収条件が成立
次第、三方弁を回収側として転炉ガスを回収することを
特徴とする転炉ガス回収方法。1. In a converter gas recovery facility having a three-way valve and a recovery valve in the converter gas duct between the induction fan and the converter gas recovery holder from the induction fan side, one on the furnace top of the converter gas duct and the induction fan downstream. Side and upstream of the three-way valve, another analyzer for oxygen concentration in gas is installed, and the oxygen concentration constant value (L1) or less on the induction fan downstream side is used as part of the converter gas recovery condition, and the oxygen on the induction fan downstream side is used. When the converter gas recovery conditions other than the constant concentration value (L1) or less and the oxygen concentration constant value (L2) or less at the furnace top are satisfied, an open command is issued only for the converter gas recovery valve and the oxygen concentration on the downstream side of the induction fan. A converter gas recovery method comprising recovering converter gas with a three-way valve as a recovery side as soon as all converter gas recovery conditions including a certain value (L1) or less are satisfied.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4014499A JP2540687B2 (en) | 1992-01-30 | 1992-01-30 | Converter gas recovery method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4014499A JP2540687B2 (en) | 1992-01-30 | 1992-01-30 | Converter gas recovery method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05209212A JPH05209212A (en) | 1993-08-20 |
| JP2540687B2 true JP2540687B2 (en) | 1996-10-09 |
Family
ID=11862753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4014499A Expired - Lifetime JP2540687B2 (en) | 1992-01-30 | 1992-01-30 | Converter gas recovery method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2540687B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102978333A (en) * | 2012-11-19 | 2013-03-20 | 首钢总公司 | System and method for converter gas recovery |
| KR101476572B1 (en) * | 2012-05-30 | 2014-12-24 | 신닛테츠스미킨 카부시키카이샤 | Apparatus for recovering waste gas of converter and method for recovering waste gas of converter |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5476792B2 (en) * | 2008-05-16 | 2014-04-23 | Ｊｆｅスチール株式会社 | Method for reforming exhaust gas generated from metallurgical furnace, reformer, and method for producing reformed gas |
| CA2721329C (en) * | 2008-05-16 | 2012-04-10 | Jfe Steel Corporation | Method for reforming exhaust gas generated from metallurgical furnace, method for cooling exhaust gas and apparatus therefor |
| JP5527168B2 (en) * | 2010-11-10 | 2014-06-18 | 新日鐵住金株式会社 | Converter exhaust gas recovery device and converter exhaust gas recovery method |
| US9052110B2 (en) | 2010-11-10 | 2015-06-09 | Nippon Steel & Sumitomo Metal Corporation | Converter exhaust gas recovery apparatus and converter exhaust gas recovery method |
| JP5609747B2 (en) * | 2011-04-05 | 2014-10-22 | 新日鐵住金株式会社 | Converter gas recovery method |
| CN116162758B (en) * | 2022-12-19 | 2025-01-21 | 本钢板材股份有限公司 | A method for increasing converter gas recovery |
| CN117187475A (en) * | 2023-08-30 | 2023-12-08 | 重庆赛迪热工环保工程技术有限公司 | A converter gas recovery and utilization system and method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0216984U (en) * | 1988-07-19 | 1990-02-02 |
-
1992
- 1992-01-30 JP JP4014499A patent/JP2540687B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101476572B1 (en) * | 2012-05-30 | 2014-12-24 | 신닛테츠스미킨 카부시키카이샤 | Apparatus for recovering waste gas of converter and method for recovering waste gas of converter |
| CN102978333A (en) * | 2012-11-19 | 2013-03-20 | 首钢总公司 | System and method for converter gas recovery |
| CN102978333B (en) * | 2012-11-19 | 2014-08-27 | 首钢总公司 | System and method for converter gas recovery |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05209212A (en) | 1993-08-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19960326 |