JPH0329843B2 - - Google Patents
Info
- Publication number
- JPH0329843B2 JPH0329843B2 JP16779182A JP16779182A JPH0329843B2 JP H0329843 B2 JPH0329843 B2 JP H0329843B2 JP 16779182 A JP16779182 A JP 16779182A JP 16779182 A JP16779182 A JP 16779182A JP H0329843 B2 JPH0329843 B2 JP H0329843B2
- Authority
- JP
- Japan
- Prior art keywords
- gas
- combustion exhaust
- exhaust gas
- blast furnace
- air
- 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
Links
- 239000007789 gas Substances 0.000 claims description 83
- 238000002485 combustion reaction Methods 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 10
- 238000010926 purge Methods 0.000 claims description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 238000001514 detection method Methods 0.000 description 6
- 238000004880 explosion Methods 0.000 description 5
- 239000002360 explosive Substances 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 239000012717 electrostatic precipitator Substances 0.000 description 1
- 238000004868 gas analysis Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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)
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溜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。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上回り、爆発の
危険性を大きくする。このため、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
に爆発の危険を避けるためのパージ用ガスを媒体
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
する二段切換を行つている。 When repairing the blast furnace gas cleaning system or distillation tower,
It is necessary to replace the flammable gas present inside with air, and once repairs are completed, the air inside must be replaced with flammable gas again in preparation for operation. In such cases, direct replacement of flammable gas with air or air with flammable gas can eliminate these two
The composition of the species gas mixture exceeds the explosive limit, increasing the risk of explosion. Therefore, when replacing these gases with each other, a purge gas is used as a medium to avoid the risk of explosion between the flammable gas and the air, for example, by temporarily replacing the flammable gas with the medium gas. After purging, two-stage switching is performed to purge the medium gas with air.
この二段切換用の媒体ガスとして、従来は不燃
性のN2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Ｎm3／Hr程度のガ
ス量が必要であり、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、N2ガスを使用する
と極めてコスト高となる欠点があつた。 Conventionally, non-flammable N 2 gas has been used as the medium gas for this two-stage switching, but when purging the entire gas cleaning system, a gas amount of about 250,000 Nm 3 /Hr is required. Moreover, twice this amount is required for the round trip process, so using N 2 gas had the disadvantage of extremely high costs.
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つ
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、N2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 medium gas for substitution in place of N 2 gas, and the combustion exhaust gas is the exhaust gas of a hot blast furnace installed in a separate blast furnace operation system. do.
次に、第１図によつ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は、第１除塵機１１、第２除塵
機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
気導入用フアン１５および空気導入管１６によつ
て清浄系１内へパージ用空気を導入できるように
なつている。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 an embodiment of the method of the present invention will be specifically explained with reference to FIG. For example, the gas cleaning system 1 for the No. 1 blast furnace is formed by sequentially connecting a first dust remover 11, a second dust remover 12, a furnace top turbine 13, an electrostatic precipitator 14, etc. in series, and Purge air can be introduced into the cleaning system 1 by an introduction fan 15 and an air introduction pipe 16. In the method of the present invention, for example, the combustion exhaust gas of the hot blast furnace 2 for a No. 2 blast furnace is utilized for the gas cleaning system having such a configuration.
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
連接し、他端はフアン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
のフアン接続側には、第２図に示すように、水封
弁４を設けておき、さらにフアン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 air stove 2, and the other end is communicated with the air introduction pipe 16 in the clean system through a fan 15. I'll keep it. Introductory tube 3
As shown in FIG. 2, a water seal valve 4 is provided on the fan connection side of the fan 15, and the connection end with 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つて酸素量
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
て検出できるようにしておく。本発明法において
は、燃焼排ガスを、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ない範囲
にあることを確認した上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.
The composition of the combustion exhaust gas passing through the system can be continuously analyzed and detected. In the method of the present invention, combustion exhaust gas is used as a medium gas after confirming that the composition of the combustion exhaust gas is within a range that does not cause an explosion when mixed with flammable gas or air.
したがつて、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。爆発限界としてはガス中の許容酸素濃度
が2.0％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つてお
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. The explosion limit requires that the allowable oxygen concentration in the gas be maintained within 2.0%, and the composition of the flammable gas to be purged should also be analyzed at the same time.
次に、本発明によるパージの過程を説明する。
１中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とフア
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つては、まず
導入管３内に導入した燃焼排ガスを検出装置５に
よつて分析し、ガス組成が爆発を誘起しない安全
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から清浄系外へ排出され、同時にフアン
１５によつて導入管３からの媒体ガスが、別の導
入管１６を経てガス清浄系内へ流入する。 Next, the purging process according to the present invention will be explained.
When repairing the gas cleaning system 1 by shutting down the blast furnace during 1, the water seal valve 4 is closed, and N 2 gas is introduced into the small pipe line between the water seal valve 4 and the fan 15. has been done. 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 safety limit that does not induce 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 causes the medium gas from the inlet pipe 3 to pass through another inlet pipe 16 into the gas cleaning system. flows into.
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、フアン１５を空気導入側に
切換え、導入管１６によつてガス清浄系内へ空気
を導入する。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。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。 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. This process is exactly the same when replacing air with flammable gas.
上述の過程において、媒体ガスとして使用され
る燃焼排ガスは、常に検出装置５によつて連続分
析されて安全を確認したものだけが使用されるも
のであつて、万一、分析値が安全限界を超えた場
合はすみやかに水封弁４が閉止して燃焼排ガスの
供給を中止し、これに代つてN2ガスが一時的に
供給される。そして、燃焼排ガスの組成が安全限
界内に戻つ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行われる。なお、上述の過
程における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 process, the combustion exhaust gas used as the medium gas is always continuously analyzed by the detection device 5 and only that which has been confirmed to be safe is used. If it exceeds the limit, the water seal valve 4 immediately closes to stop the supply of combustion exhaust gas, and N2 gas is temporarily supplied in its place. 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 N 2 gas in the above process 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、熱風炉の排ガス量は一基稼動燃焼だけの場合
でも25万Ｎm3／Hr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
つたものだけを選択的に導入して使用することが
できる。 In this way, according to the gas replacement method of the present invention,
Since combustion exhaust gas from a hot blast furnace can be used as a medium gas for gas replacement in blast furnace gas equipment, it is possible to significantly reduce costs compared to N2 gas. Moreover, even when only one hot blast stove is operating and burning, it is possible to obtain a gas emission amount of 250,000 Nm 3 /Hr, so there is no need to worry about purging the entire gas purification system. Instead, it is possible to selectively introduce and use only those for which safety limits have been sufficiently adjusted.
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−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 minus part 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)
に置換する場合において、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排ガスを予
め連続分析によつ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。1. When replacing combustible 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 exhaust gas used as the medium gas is continuously analyzed in advance. 1. A gas replacement method for blast furnace gas equipment, characterized in that the oxygen concentration is detected by a method, the combustion exhaust gas is confirmed to be within a composition range to be replaced, and then guided 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 JPS5956506A (en) | 1984-04-02 |
| JPH0329843B2 true 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 (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20150146423A (en) * | 2014-06-20 | 2015-12-31 | 린나이코리아 주식회사 | Gas range |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4781032B2 (en) * | 2005-07-20 | 2011-09-28 | 中国電力株式会社 | Gas replacement method and gas replacement device in piping |
| LU91572B1 (en) | 2009-05-20 | 2010-11-22 | Wurth Paul Sa | Method for operating a regenerative heater. |
-
1982
- 1982-09-27 JP JP16779182A patent/JPS5956506A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20150146423A (en) * | 2014-06-20 | 2015-12-31 | 린나이코리아 주식회사 | Gas range |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5956506A (en) | 1984-04-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2149312C1 (en) | Modification in burning and utilization of fuel gases | |
| CN105157047A (en) | Method and system for debugging boiler of 1045MW ultra-supercritical coal-fired unit through pipe purging | |
| SE466814B (en) | DEVICE FOR DEGRADATION OF GASES GENERATED FOR PRESENT BURNING AT UNGEFER 850 DEGREES C OF THE SOLID BROWN IN A LIQUID BED | |
| JPH0329843B2 (en) | ||
| US5657705A (en) | Heat treatment furnace for waste and associated process | |
| RU2614281C1 (en) | Complex with filter for dry cleaning of explosive gas mixtures | |
| CN216693583U (en) | Ignition condition detection system of heat accumulating type incinerator | |
| KR20050023886A (en) | An apparatus for removing dust in exhaust gas | |
| JPH04168235A (en) | Method for cleaning main exhaust gas of sintering machine | |
| EP0340226A1 (en) | A method of preheating scrap | |
| JPS5843320A (en) | Denitrifying apparatus | |
| CN109355456A (en) | A kind of converter coal gas purification recycles and combines the device and application method of final dusting | |
| JPH10122539A (en) | Discharged gas processing device | |
| KR102105036B1 (en) | Oxyfuel combustion device using high concentration carbon dioxide and method for oxyfuel combustion using the same | |
| JPH11173538A (en) | Method for cooling exhaust gas in ash melting facility | |
| KR0170083B1 (en) | Exhausting apparatus of a dust collector | |
| CN108800167A (en) | A kind of compound burner and organic wastewater and combustible powder compounding method | |
| JPH03138312A (en) | Pressurizing-type converter exhaust gas treating apparatus and its operating method | |
| JP3918476B2 (en) | Coke oven exhaust gas discharge device and black smoke discharge prevention method | |
| SU1361175A1 (en) | Gas cleaning system | |
| JP2597307B2 (en) | Exhaust gas switching device | |
| JPH06170139A (en) | Exhaust gas treating apparatus | |
| JP3408845B2 (en) | Exhaust gas purifier and its operation method | |
| JPH089149Y2 (en) | Gas replacement device for blast furnace gas cleaning facility | |
| JP2968176B2 (en) | Exhaust gas temperature control method for heat storage regeneration combustion system |