JPH0127357B2 - - Google Patents
Info
- Publication number
- JPH0127357B2 JPH0127357B2 JP55087950A JP8795080A JPH0127357B2 JP H0127357 B2 JPH0127357 B2 JP H0127357B2 JP 55087950 A JP55087950 A JP 55087950A JP 8795080 A JP8795080 A JP 8795080A JP H0127357 B2 JPH0127357 B2 JP H0127357B2
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- blast furnace
- water
- furnace exhaust
- emergency cooling
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 49
- 239000007789 gas Substances 0.000 claims description 24
- 238000001816 cooling Methods 0.000 claims description 17
- 239000000428 dust Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 8
- 239000007921 spray Substances 0.000 claims description 8
- 239000011261 inert gas Substances 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- 229910001873 dinitrogen Inorganic materials 0.000 description 10
- 230000007423 decrease Effects 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Blast Furnaces (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Description
【発明の詳細な説明】
本発明は加圧水を利用する高炉排ガスの緊急冷
却法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for emergency cooling of blast furnace exhaust gas using pressurized water.
高炉排ガスの温度は、通常運転時100〜150℃程
度であるが炉内吹抜け等の異常時には一般的に
1000℃にも達することがある。ガス温度を下げる
手段としてダクト内にノズルによる散水設備を取
付ける例もある。散水を必要とするような異常高
温の発生ひん度は稀であるものゝ、この散水ノズ
ルへ給水するためのポンプ設備は常に運転可能状
態で整備しておかなければならず、しかも温度上
昇が急激であるため、異常が検知されてからポン
プを起動しても間に合わないケースもある。また
高温の持続時間は10分間以内であるにもかゝわら
ず、ポンプ設備としては大容量（200T／Ｈ前後）
のものが必要となる。 The temperature of blast furnace exhaust gas is around 100 to 150℃ during normal operation, but during abnormalities such as blow-through in the furnace, the temperature generally decreases.
Temperatures can reach up to 1000℃. In some cases, water spray equipment using nozzles is installed inside the duct as a means of lowering the gas temperature. Although the occurrence of abnormally high temperatures that require water sprinkling is rare, the pump equipment for supplying water to the water nozzles must be maintained in an operable state at all times, and the temperature rises rapidly. Therefore, even if the pump is started after an abnormality is detected, there may be cases where it is not possible to start the pump in time. Also, although the high temperature lasts for less than 10 minutes, the pump equipment has a large capacity (around 200T/H).
You will need something like this.
高炉排ガスを、後続のベンチユリスクラバなど
で処理している場合は、異常高温が発生しても大
きな被害はないが、たとえば乾式集じん装置およ
びタービンなどに通す場合はこれらの機器が焼損
するおそれがある。 If blast furnace exhaust gas is treated with a subsequent ventilator scrubber, there will be no major damage even if abnormally high temperatures occur, but if it is passed through a dry dust collector or turbine, for example, there is a risk that these devices will burn out. There is.
本発明は上述の従来の欠点を解決し、ポンプを
用いないで時間遅れなく緊急冷却を行なう方法を
提供せんとするものである。 The present invention aims to solve the above-mentioned conventional drawbacks and provide a method for performing emergency cooling without time delay without using a pump.
すなわち本発明は、耐圧貯水タンクに水張りす
ると共にその上部に不活性ガスを加圧充填し、こ
の耐圧貯水タンク下部から散水ノズルに至る管路
を高炉排ガス異常高温発生時に開放して前記散水
ノズルにより高温排ガス中に水を噴霧することを
特徴とする、高炉排ガスの緊急冷却法にある。 That is, in the present invention, a pressure-resistant water storage tank is filled with water and an inert gas is pressurized into the upper part of the tank, and a pipe line leading from the lower part of the pressure-resistant water storage tank to a water sprinkling nozzle is opened when an abnormally high temperature of blast furnace exhaust gas occurs to cause the water spray nozzle to An emergency cooling method for blast furnace exhaust gas characterized by spraying water into high-temperature exhaust gas.
以下本発明を添付図面に例示したその好適な実
施例について詳述する。 DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to preferred embodiments illustrated in the accompanying drawings.
第１図に示す本発明方法を実施する第１の実施
装置において、参照番号１は通常高炉に付設する
ダストキヤツチヤを示す。高炉排ガスは矢印で示
すようにその頂部より導入され、内部で方向を反
転し、側部のダクトより排出される。このダスト
キヤツチヤ１の側壁にはいくつかの散水ノズル６
が配設されており、これらの散水ノズル６のヘダ
ー管５は別置の耐圧貯水タンク２の下部に流量コ
ントロール弁４、電磁弁３を介し連通せしめてあ
る。耐圧貯水タンク２内には小容量の給水ポンプ
１０を介してあらかじめ水を供給しておき、また
同様にこの耐圧貯水タンク２の上部にはたとえば
窒素ガスのような不活性ガスを加圧充填してお
く。耐圧貯水タンク２の上部はまた電磁弁９を介
してヘダー管５に直結してある。参照番号７，８
は排ガス温度計である。 In a first implementation apparatus for carrying out the method of the invention shown in FIG. 1, reference numeral 1 designates a dust catcher which is usually attached to a blast furnace. Blast furnace exhaust gas is introduced from the top as shown by the arrow, reverses direction inside, and is discharged from the side duct. There are several water nozzles 6 on the side wall of this dust catcher 1.
The header pipes 5 of these water spray nozzles 6 are connected to the lower part of a separate pressure-resistant water storage tank 2 via a flow rate control valve 4 and a solenoid valve 3. Water is previously supplied into the pressure-resistant water storage tank 2 via a small-capacity water supply pump 10, and the upper part of the pressure-resistant water storage tank 2 is also pressurized and filled with an inert gas such as nitrogen gas. I'll keep it. The upper part of the pressure-resistant water storage tank 2 is also directly connected to the header pipe 5 via a solenoid valve 9. Reference numbers 7, 8
is an exhaust gas thermometer.
さて、高炉排ガスの異常高温が温度計７で検知
されたとき、その信号により電磁弁３が開く。貯
水タンク内の水は、散水ノズルでダストキヤツチ
ヤ１内に噴霧されるが、その時の水量は、流量コ
ントロール弁４で制御される。制御（制御ライン
は省略）は、ダストキヤツチヤ１の出口の温度を
温度計８で検知し、予じめ設定した温度となるよ
うに流量コントロール弁４が自動制御される。 Now, when the abnormally high temperature of the blast furnace exhaust gas is detected by the thermometer 7, the solenoid valve 3 is opened by the signal. Water in the water storage tank is sprayed into the dust catcher 1 by a water spray nozzle, and the amount of water at that time is controlled by a flow rate control valve 4. For control (control lines are omitted), the temperature at the outlet of the dust catcher 1 is detected by a thermometer 8, and the flow rate control valve 4 is automatically controlled to maintain a preset temperature.
この装置は通常は作動しないために、ノズルチ
ツプにダストが付着し閉塞が懸念されるので電磁
弁９で定期的（たとえば１回／日数秒間）に窒素
ガスでブローして掃除する。 Since this device does not normally operate, there is a concern that dust may adhere to the nozzle tip and cause it to become clogged, so the solenoid valve 9 is used to blow nitrogen gas periodically (for example, once a day for several seconds) to clean it.
この方法では、常時加圧状態の水が耐圧貯水タ
ンク２に蓄えられているので、異常高温が検知さ
れ、散水が行われるまでのレスポンスが早いこ
と、高圧大容量のポンプを設置し、それを常時運
転可能状態で保守整備しておく必要がないこと、
ノズルの塞りがないこと、既設のダストキヤツチ
ヤを冷却塔に使えるなどのメリツトがある。 In this method, since water under constant pressure is stored in the pressure-resistant water storage tank 2, the response from abnormally high temperature to the point at which watering is performed is quick, and a high-pressure, large-capacity pump is installed. There is no need for constant maintenance and maintenance,
Advantages include nozzle blockage and the ability to use an existing dust catcher as a cooling tower.
加圧水を得る別の具体例を第２図に示す。参照
番号１〜１０は第１図と同じであるのでその説明
を省略する。窒素ガスタンク１１は、貯水タンク
の圧力よりも高圧の状態で窒素ガスが充填されて
いる。参照番号１２は電磁弁、１３は減圧弁、１
４は断熱膨張により温度が下るので、窒素ガスを
予熱しておくためのスチームヒーターである。 Another specific example of obtaining pressurized water is shown in FIG. Reference numbers 1 to 10 are the same as in FIG. 1, so their explanation will be omitted. The nitrogen gas tank 11 is filled with nitrogen gas at a pressure higher than that of the water storage tank. Reference number 12 is a solenoid valve, 13 is a pressure reducing valve, 1
4 is a steam heater for preheating nitrogen gas since the temperature drops due to adiabatic expansion.
第１図の方法であれば、貯水タンク内の水の排
出に伴ない、上部の窒素ガスが膨張し圧力がしだ
いに低下する。そのためノズルの噴霧状態が悪く
なりこれが欠点となることがある。この場合にそ
の不具合を改善したのが第２図に記載した実施例
で、貯水タンクの圧力より、更に高圧の窒素ガス
タンクを別置にしたものである。ガス冷却を要す
る緊急時には電磁弁１２が開き（この弁は場合に
よつては無くても良い）減圧弁１３で、貯水タン
ク内の圧力を一定に保つことが可能である。貯水
タンクと窒素ガスタンクを別置にすれば、次のメ
リツトがある。 In the method shown in FIG. 1, as the water in the water storage tank is discharged, the nitrogen gas in the upper part expands and the pressure gradually decreases. Therefore, the spray condition of the nozzle may deteriorate, which may be a drawback. In this case, the problem has been solved in the embodiment shown in FIG. 2, in which a nitrogen gas tank with a pressure higher than that of the water storage tank is provided separately. In an emergency that requires gas cooling, the electromagnetic valve 12 opens (this valve may not be necessary depending on the case), and the pressure in the water storage tank can be kept constant using the pressure reducing valve 13. Separating the water storage tank and nitrogen gas tank has the following advantages:
(イ) 貯水タンクは、ノズル噴霧に必要な圧力（10
〜20Kg／cm2、またはそれ以上）の耐圧、構造の
もので良い。一方窒素ガスタンクは高圧力（数
10Kg／cm2）で貯蔵しておくので小形で良い。(a) The water storage tank has the pressure required for nozzle spraying (10
A structure that can withstand a pressure of ~20Kg/cm 2 or more is fine. On the other hand, the nitrogen gas tank has high pressure (several
Since it is stored at 10Kg/cm 2 ), it can be small.
(ロ) 時間の経過と共に圧力が低下することがな
い。(b) Pressure does not decrease over time.
第１図は本発明方法を実施する第の実施例の系
統図、第２図は第２の実施例の要部の系統図であ
る。
１……ダストキヤツチヤ、２……耐圧貯水タン
ク、３……電磁弁、４……流量コントロール弁、
５……ヘダー管、６……散水ノズル、７，８……
排ガス温度計、９……電磁弁、１０……小容量給
水ポンプ、１１……窒素ガスタンク、１２……電
磁弁、１３……減圧弁、１４……スチームヒータ
ー。
FIG. 1 is a system diagram of a second embodiment for carrying out the method of the present invention, and FIG. 2 is a system diagram of main parts of the second embodiment. 1...Dust catcher, 2...Pressure water storage tank, 3...Solenoid valve, 4...Flow rate control valve,
5... Header pipe, 6... Water nozzle, 7, 8...
Exhaust gas thermometer, 9... Solenoid valve, 10... Small capacity water supply pump, 11... Nitrogen gas tank, 12... Solenoid valve, 13... Pressure reducing valve, 14... Steam heater.
Claims (1)
に不活性ガスを加圧充填し、この耐圧貯水タンク
下部から散水ノズルに至る管路を高炉排ガス異常
高温発生時に開放して前記散水ノズルより高温排
ガス中に水を噴霧することを特徴とする、高炉排
ガスの緊急冷却法。 ２ 特許請求の範囲第１項記載の高炉排ガスの緊
急冷却法において、別置の加圧ガスタンクより不
活性ガスを前記耐圧貯水タンクに補給することを
特徴とする、高炉排ガスの緊急冷却法。 ３ 特許請求の範囲第１項記載の高炉排ガスの緊
急冷却法において、前記不活性ガスを前記散水ノ
ズルへ間欠的に供給してブローし、その穴の塞り
を防止することを特徴とする、高炉排ガスの緊急
冷却法。 ４ 特許請求の範囲第１項記載の高炉排ガスの緊
急冷却法において、高炉排ガスの緊急温度上昇の
信号によつて水を開動作させた後設定冷却温度に
維持するために水量を加減して散水することを特
徴とする、高炉排ガスの緊急冷却法。 ５ 特許請求の範囲第１項記載の高炉排ガスの緊
急冷却法において、通常高炉に付設するダストキ
ヤツチヤに前記散水ノズルを設け、この散水ノズ
ルからの散水の蒸気冷却により前記ダストキヤツ
チヤ内で緊急冷却を行なうことを特徴とする、高
炉排ガスの緊急冷却法。[Scope of Claims] 1. A pressure-resistant water storage tank is filled with water and the upper part thereof is pressurized with inert gas, and a pipe line from the lower part of the pressure-resistant water storage tank to a water sprinkling nozzle is opened when an abnormally high temperature of blast furnace exhaust gas occurs to perform the water sprinkling. An emergency cooling method for blast furnace exhaust gas that is characterized by spraying water into high-temperature exhaust gas from a nozzle. 2. The emergency cooling method for blast furnace exhaust gas according to claim 1, characterized in that the pressure-resistant water storage tank is replenished with inert gas from a separately placed pressurized gas tank. 3. The emergency cooling method for blast furnace exhaust gas as set forth in claim 1, characterized in that the inert gas is intermittently supplied to the water spray nozzle to blow it to prevent the hole from clogging. Emergency cooling method for blast furnace exhaust gas. 4. In the method for emergency cooling of blast furnace exhaust gas described in claim 1, after water is opened in response to a signal indicating an emergency temperature rise of blast furnace exhaust gas, the amount of water is adjusted to maintain the set cooling temperature. An emergency cooling method for blast furnace exhaust gas, which is characterized by: 5. In the method for emergency cooling of blast furnace exhaust gas as set forth in claim 1, the water spray nozzle is provided in a dust catcher normally attached to a blast furnace, and the emergency cooling is carried out in the dust catcher by steam cooling of water sprayed from the water spray nozzle. An emergency cooling method for blast furnace exhaust gas characterized by cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8795080A JPS5714174A (en) | 1980-06-30 | 1980-06-30 | Emergency cooling of blast furnace exhaust gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8795080A JPS5714174A (en) | 1980-06-30 | 1980-06-30 | Emergency cooling of blast furnace exhaust gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5714174A JPS5714174A (en) | 1982-01-25 |
| JPH0127357B2 true JPH0127357B2 (en) | 1989-05-29 |
Family
ID=13929159
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8795080A Granted JPS5714174A (en) | 1980-06-30 | 1980-06-30 | Emergency cooling of blast furnace exhaust gas |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5714174A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05156835A (en) * | 1991-12-06 | 1993-06-22 | Tatsuno Co Ltd | Parking device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5440207A (en) * | 1977-09-07 | 1979-03-29 | Nippon Kokan Kk <Nkk> | Recovering apparatus for energy of furnace top gas of blast furnace |
-
1980
- 1980-06-30 JP JP8795080A patent/JPS5714174A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5440207A (en) * | 1977-09-07 | 1979-03-29 | Nippon Kokan Kk <Nkk> | Recovering apparatus for energy of furnace top gas of blast furnace |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05156835A (en) * | 1991-12-06 | 1993-06-22 | Tatsuno Co Ltd | Parking device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5714174A (en) | 1982-01-25 |
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