JPS5956506A - Gas substituting method of gas installation for blast furnace - Google Patents
Gas substituting method of gas installation for blast furnaceInfo
- Publication number
- JPS5956506A JPS5956506A JP16779182A JP16779182A JPS5956506A JP S5956506 A JPS5956506 A JP S5956506A JP 16779182 A JP16779182 A JP 16779182A JP 16779182 A JP16779182 A JP 16779182A JP S5956506 A JPS5956506 A JP S5956506A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- pipe
- blast furnace
- air
- waste combustion
- 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
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B9/00—Stoves for heating the blast in blast furnaces
- C21B9/14—Preheating the combustion air
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Pipeline Systems (AREA)
- Blast Furnaces (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、高炉ガス設備のガス置換方法に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for replacing gas in blast furnace gas equipment.
高炉ガス清浄系や蒸留塔を修理する場合には、内部に存
在する可燃性ガス空気に置換する必要があり、修理を完
了した時点では、操業に備えて内部の空気を再び可燃性
ガスに置換する必要がある。When repairing a blast furnace gas cleaning system or distillation column, it is necessary to replace the air with the flammable gas that exists inside. Once the repair is completed, the air inside must be replaced with flammable gas again in preparation for operation. There is a need to.
このような場合、可燃性ガスを空気で、または空気を可
燃性ガスで直接置換すると、これら２種の混合気体の組
成が爆発限界を」二回り、爆発の危険性を大きくする。In such a case, if the flammable gas is directly replaced with air or the air is directly replaced with a flammable gas, the composition of the two gas mixtures will exceed the explosive limit by 20%, increasing the risk of explosion.
このだめ、これらのガス相互を置換する場合には、可燃
性ガスと空気との間に爆発の危険を瞳けるだめのパージ
川ガスを媒体として使用し、例えば可燃性ガスを媒体ガ
スで一時的にパージした後に、媒体ガスを空気でパージ
する二段切換を行っている。In this case, when replacing these gases with each other, purge gas is used as a medium to avoid the risk of explosion between the flammable gas and the air, and for example, the flammable gas is temporarily replaced with the medium gas. Two-stage switching is performed in which the medium gas is purged with air after being purged with air.
この二段切換用の媒体ガスとして、従来は不燃性のＮＺ
ガスが使用されているが、ガス清浄系全体をパージする
場合には２５万Ｎ＋ｙＪ、ｒ 程度のガス隈が必要で
あり、しかも往復の過程ではこれの２倍の量が必要とな
るので、ＮＺガスを使用すると極めてコスト高となる欠
点があった。Conventionally, nonflammable NZ was used as the medium gas for this two-stage switching.
Gas is used, but in order to purge the entire gas cleaning system, a gas chamber of about 250,000 N+yJ, r is required, and twice this amount is required for the round trip process, so NZ The disadvantage of using gas is that it is extremely costly.
本発明の目的は、Ｎ２ガス使用に伴う従来の欠点に対処
することであり、低コストのガスによって安全にガス置
換しうる方法を提供することにある。It is an object of the present invention to address the conventional drawbacks associated with the use of N2 gas and to provide a method for safely replacing the gas with a low cost gas.
本発明法においては、ＮＺガスに代る置換用媒体ガスと
して、爆発しない組成範囲にある燃焼排ガスを使用し、
その燃焼排ガスは別の高炉操業系に組込まれている熱風
炉の排ガスを利用する。In the method of the present invention, combustion exhaust gas in a non-explosive composition range is used as a replacement medium gas instead of NZ gas,
The combustion exhaust gas is from a hot blast furnace built into another blast furnace operation system.
次に、第１図によって本発明法における一実施例の構成
を具体的に説明する。例えば、１号高炉用のガス清浄系
１ば、第１除塵機１１、第２除塵］幾１２、炉頂タービ
ン１３、電気集塵機１４等が順次直列状に連接されて全
体を形成しており、空気導入用ファン１５および空気導
入管１６によって清浄系１内へパージ用空気を導入でき
るようになっている。このような構成のガス清浄系に対
して、本発明法においては例えば２号高炉用の熱風炉２
の燃焼排ガスを利用する。Next, the configuration of one embodiment of the method of the present invention will be specifically explained with reference to FIG. For example, a gas cleaning system 1 for a No. 1 blast furnace, a first dust remover 11, a second dust remover 12, a furnace top turbine 13, an electrostatic precipitator 14, etc. are connected in series to form a whole. Purge air can be introduced into the cleaning system 1 by an air introduction fan 15 and an air introduction pipe 16. In the method of the present invention, for example, a hot blast furnace 2 for a No. 2 blast furnace is used for a gas cleaning system having such a configuration.
The combustion exhaust gas is used.
熱風炉２の燃焼排ガス排出管２１に、燃焼排ガス導入管
（以下、導入管という。）３の導入端を連接１−１他端
はファン１５をかいして清浄系における空気導入管１６
に連通させておく。導入管３のファン接続側には、第２
図に示すように、水封弁４を設けておき、さらにファン
１５との接続端を蛇腹構造３１に形成して着脱できるよ
うにしておく。The inlet end of a combustion exhaust gas introduction pipe (hereinafter referred to as an introduction pipe) 3 is connected to the combustion exhaust gas exhaust pipe 21 of the hot blast stove 2 1-1, and the other end is connected to the air introduction pipe 16 in the clean system through a fan 15.
I will communicate with you. On the fan connection side of the introduction pipe 3, there is a second
As shown in the figure, a water seal valve 4 is provided, and a connecting end to the fan 15 is formed into a bellows structure 31 so that it can be attached and detached.
導入管３の導入側にはガス分析によって酸素量等を検出
する検出装置５を設けておき、導入管３内を通過する燃
焼排ガスの組成を連続的に分析し７て検出できるように
しておく。本発明法においては、燃焼刊ガスを、可燃性
ガスまたは空気と混ぜた場合、燃焼排ガスの組成が爆発
を生じノ（い範囲にあることを確認した」−１で媒体ガ
スとして使用する。A detection device 5 for detecting the amount of oxygen, etc. by gas analysis is provided on the introduction side of the introduction pipe 3 so that the composition of the combustion exhaust gas passing through the introduction pipe 3 can be continuously analyzed and detected. . In the method of the present invention, it has been confirmed that the composition of combustion exhaust gas is within a range that does not cause an explosion when mixed with combustible gas or air.''-1 is used as a medium gas.
したがって、検出装置５による連続検出の結果、燃焼排
ガスの組成が爆発限界に達した場合は、水封弁４を自動
的に遮断作動させるようにしておく。Therefore, if the composition of the combustion exhaust gas reaches the explosive limit as a result of continuous detection by the detection device 5, the water seal valve 4 is automatically shut off.
爆発限界としてはガス中の許容酸素濃度が２０ス以中に
保たれることが必要であり、パージされる可燃性ガスの
組成分析も同時に行っておく。As an explosion limit, it is necessary that the allowable oxygen concentration in the gas be maintained within 20 s, and a compositional analysis of the flammable gas to be purged is also conducted at the same time.
次に、本発明によるパージの過程を説明する。Next, the purging process according to the present invention will be explained.
１号高炉を休風してガス清浄系１を修理する場合、水封
弁４は閉止されており、水封弁４とファン１５との間の
わずかな管路内にはＮ２ガスが導入されている。媒体ガ
スの導入に当っては、まず導入管３内に導入した燃焼排
ガスを検出装置５によって分析し、ガス組成が爆発を訪
起しない安全限界内にあることを確認すると、水封弁４
が開かれる。ここで、ガス清浄系１内の可燃性ガスは放
散弁１７から清浄系外−＼排出され、同時にファン１５
によ−）て導入管３かもの媒体ガスが、別の導入管１６
を紅てガス清浄系内へ流入する。When the No. 1 blast furnace is shut down and the gas cleaning system 1 is repaired, the water seal valve 4 is closed, and N2 gas is introduced into the small pipe line between the water seal valve 4 and the fan 15. ing. When introducing the medium gas, first, the combustion exhaust gas introduced into the introduction pipe 3 is analyzed by the detection device 5, and when it is confirmed that the gas composition is within the safe limit that will not cause an explosion, the water seal valve 4 is
will be held. Here, the combustible gas in the gas cleaning system 1 is discharged from the diffusion valve 17 to the outside of the cleaning system, and at the same time, the fan 15
), the medium gas from the inlet pipe 3 is transferred to another inlet pipe 16.
The liquid is red and flows into the gas cleaning system.
可燃性ガスと中間ガスとの置換が完了した時点で水封弁
４を閉止し、ファン１５を空気導入側に切換え、導入管
１６により−（ガス清浄系内へ空気を導入１゛る。この
時、ガス清浄系内にある媒体ガスは放散弁１７から順次
外部へ排出され、やがて内部全体が空気に置換される。When the replacement of the flammable gas and the intermediate gas is completed, the water seal valve 4 is closed, the fan 15 is switched to the air introduction side, and air is introduced into the gas cleaning system through the introduction pipe 16. At this time, the medium gas in the gas cleaning system is sequentially discharged to the outside from the diffusion valve 17, and the entire interior is eventually replaced with air.
このような過程は、空気から可燃性ガスに再置換する場
合も全く同様な過程を経て行われる。This process is exactly the same when replacing air with flammable gas.
上述の過程におし・て、媒体ガスとして１吏用される燃
焼排ガスは、常に検出装置５によって連続分析されて安
全を確認１−たものだけが使用されるものであって、万
一、分析値が安全限界を超えた場合はずみやかに水封弁
４が閉止して燃焼排ガスの供給を中正し、これに代って
Ｎ２ガスが一時的に供給されろ。そして、燃焼排ガスの
組成が安全限界内に戻った時点で再び水封弁４が開かれ
て媒体ガスとして供給導入が１ｊわれる。なお、」、述
の過程にオ６けるＮ２ガスの一時的な供給は、これを省
略しても差支えない。In the above-mentioned process, the combustion exhaust gas used as the medium gas is always continuously analyzed by the detection device 5 and only the one that has been confirmed to be safe is used. When the analysis value exceeds the safety limit, the water seal valve 4 is immediately closed to interrupt the supply of combustion exhaust gas, and instead of this, N2 gas is temporarily supplied. Then, when the composition of the combustion exhaust gas returns to within the safe limit, the water seal valve 4 is opened again and the supply is introduced as a medium gas. Note that the temporary supply of N2 gas in the process described above may be omitted.
このように、本発明のガス置換方法によれば、熱風炉の
燃焼排ガスを媒体ガスとして高炉ガス設備のガス置換を
行うことができるので、Ｎ２ガスに比較して大幅なコス
ト低下が可能になる。しかも、熱風炉の排ガス滑は一基
稼動燃焼だけの場合でも２５万Ｎｍ” ／１（ｒのガス
排出量を得ることができるので、ガス清浄系全体のパー
ジに対しても量的には全く不安がなく、安全限界調整を
十分に行ったものだけを選択的に導入して使用すること
ができる０As described above, according to the gas replacement method of the present invention, it is possible to perform gas replacement in blast furnace gas equipment using combustion exhaust gas from a hot blast furnace as a medium gas, making it possible to significantly reduce costs compared to N2 gas. . Moreover, the exhaust gas flow of a hot blast furnace can be 250,000 Nm''/1 (r) even when only one unit is in operation and combustion, so there is no need for purging the entire gas purification system. You can selectively introduce and use only those products with sufficient safety limit adjustment without any concerns.
第１図は本発明に係るガス置換方法の全体構成を示す概
略図。第２図は第１図におけるＩｔ−１部分の拡大断面
図。
１：高炉ガス清浄系 ２：熱風炉
３：燃焼排ガス導入管 ４：水封弁
５：検出装置FIG. 1 is a schematic diagram showing the overall configuration of the gas replacement method according to the present invention. FIG. 2 is an enlarged sectional view of the It-1 portion in FIG. 1. 1: Blast furnace gas cleaning system 2: Hot stove 3: Combustion exhaust gas introduction pipe 4: Water seal valve 5: Detection device
Claims (1)
場合において、設備内に存在する気体をパージするため
の媒体ガスとして燃焼排ガスを使用し、媒体ガスとして
使用する燃焼１：１１ガスを予め連続分析によって酸素
濃度を検出し、該燃焼排ガスが置換の対象となる組成範
囲にあることを確認してパージ用配管系に導くことを特
徴とする高炉ガス設備のガス置換方法。When replacing flammable gas existing in blast furnace gas equipment with air, combustion exhaust gas is used as a medium gas to purge the gas existing in the equipment, and the combustion 1:11 gas used as the medium gas is preliminarily prepared. A gas replacement method for blast furnace gas equipment, characterized by detecting oxygen concentration by continuous analysis, confirming that the combustion exhaust gas is within a composition range to be replaced, and guiding the flue gas to a purge piping system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16779182A JPS5956506A (en) | 1982-09-27 | 1982-09-27 | Gas substituting method of gas installation for blast furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16779182A JPS5956506A (en) | 1982-09-27 | 1982-09-27 | Gas substituting method of gas installation for blast furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5956506A true JPS5956506A (en) | 1984-04-02 |
| JPH0329843B2 JPH0329843B2 (en) | 1991-04-25 |
Family
ID=15856173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16779182A Granted JPS5956506A (en) | 1982-09-27 | 1982-09-27 | Gas substituting method of gas installation for blast furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5956506A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007024271A (en) * | 2005-07-20 | 2007-02-01 | Chugoku Electric Power Co Inc:The | Gas displacement method and gas displacement unit in piping |
| LU91572B1 (en) * | 2009-05-20 | 2010-11-22 | Wurth Paul Sa | Method for operating a regenerative heater. |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6010069B2 (en) * | 2014-06-20 | 2016-10-19 | リンナイ株式会社 | Gas stove |
-
1982
- 1982-09-27 JP JP16779182A patent/JPS5956506A/en active Granted
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007024271A (en) * | 2005-07-20 | 2007-02-01 | Chugoku Electric Power Co Inc:The | Gas displacement method and gas displacement unit in piping |
| LU91572B1 (en) * | 2009-05-20 | 2010-11-22 | Wurth Paul Sa | Method for operating a regenerative heater. |
| WO2010133476A1 (en) | 2009-05-20 | 2010-11-25 | Paul Wurth S.A. | Method for operating a regenerative heater |
| EA019811B1 (en) * | 2009-05-20 | 2014-06-30 | Поль Вурт С.А. | Method for operating a regenerative heater |
| US8807994B2 (en) | 2009-05-20 | 2014-08-19 | Paul Wurth S.A. | Method for operating a regenerative heater |
| AU2010251317B2 (en) * | 2009-05-20 | 2014-09-25 | Paul Wurth S.A. | Method for operating a regenerative heater |
| TWI489065B (en) * | 2009-05-20 | 2015-06-21 | Wurth Paul Sa | Method for operating a regenerative heater |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0329843B2 (en) | 1991-04-25 |
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