JPS6218602B2 - - Google Patents
Info
- Publication number
- JPS6218602B2 JPS6218602B2 JP24005783A JP24005783A JPS6218602B2 JP S6218602 B2 JPS6218602 B2 JP S6218602B2 JP 24005783 A JP24005783 A JP 24005783A JP 24005783 A JP24005783 A JP 24005783A JP S6218602 B2 JPS6218602 B2 JP S6218602B2
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- converter
- valve
- gas
- duct
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/38—Removal of waste gases or dust
- C21C5/40—Offtakes or separating apparatus for converter waste gases or dust
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Description
【発明の詳細な説明】
本発明は転炉排ガス処理装置に係り、詳しくは
転炉から間欠的に発生する排ガスを未燃焼の状態
で発電用ガスホルダへ送り出す非燃焼型転炉排ガ
ス処理装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a converter exhaust gas treatment device, and more particularly to a non-combustion type converter exhaust gas treatment device that sends exhaust gas intermittently generated from a converter to a power generation gas holder in an unburned state. It is.
一般に従来の非燃焼型転炉排ガス処理装置は、
第１図に示すように構成されていた。 In general, conventional non-combustion type converter exhaust gas treatment equipment is
It was constructed as shown in Figure 1.
第１図において符号１で示すものは転炉で、こ
の転炉１の操業時においては酸素吹込装置２から
転炉１内へ酸素の吹込みが行われるが、この吹込
み時にはスカート３を下降して転炉１の炉口とス
カート３との間の隙間を閉塞している。 In Fig. 1, the reference numeral 1 indicates a converter. When the converter 1 is in operation, oxygen is blown into the converter 1 from an oxygen blowing device 2. During this injection, the skirt 3 is lowered. This closes the gap between the furnace opening of the converter 1 and the skirt 3.
そして、酸素の吹込みにより転炉１から発生し
たガスを誘引送風機７によつて吸引することによ
り、ガス冷却器４、一次集塵器５、二次集塵器６
を介して冷却、集塵を行わせ、誘引送風機７を経
由して出口側ダクト８から送り出し、吹錬開始直
後と吹錬直前の排ガスのCO濃度が低い間は三方
弁９の回収弁１０側を閉じ、排ガスを排出ダクト
２３に通し、弁２５、放散流量計２６を経て煙突
２４から放散する。吹錬開始後所定時間経過する
と排ガスのCO濃度が高くなるので三方弁９の排
出ダクト２３側を閉じ、回収弁１０側を開いて排
ガスを回収ダクト１１に通し三方弁９、回収弁１
０、回収流量計１３、ゴツクル弁１４、ダンパ１
５、Ｖ形水封弁１８を経由して一旦ガスホルダ１
２に回収し、このガスホルダ１２に回収した転炉
ガスを送り出してＶ形水封弁１８を経て複数本の
ダクト１９に通し、弁２０、ブースターフアン２
１を経て発電所用ガスホルダ２２に回収する。こ
の発電所用ガスホルダ２２に回収した排ガスは発
電所ボイラへと送られる。尚、誘引送風機７の出
口側ダクト８と排出ダクト２３との間には三方弁
９の入口側においてバイパスダクト２９が設けら
れ、途中に弁３１が設けられている。また排出ダ
クト２３には煙突圧力の調整用の弁２５の後流側
においてN2パージB1系に接続されている配管３
８が接続されており、この配管３８の開閉は弁３
９によつて行なわれるようになつている。 Then, by sucking the gas generated from the converter 1 by blowing oxygen with the induced blower 7, the gas cooler 4, the primary dust collector 5, the secondary dust collector 6
The cooling and dust collection are carried out via the induced blower 7, and then sent out from the outlet duct 8. Immediately after the start of blowing and just before blowing, while the CO concentration of the exhaust gas is low, it is sent to the recovery valve 10 side of the three-way valve 9. is closed, the exhaust gas passes through the exhaust duct 23, passes through the valve 25, the diffusion flow meter 26, and is radiated from the chimney 24. When a predetermined period of time elapses after the start of blowing, the CO concentration in the exhaust gas increases, so the exhaust duct 23 side of the three-way valve 9 is closed, the recovery valve 10 side is opened, and the exhaust gas is passed through the recovery duct 11 through the three-way valve 9 and the recovery valve 1.
0, recovery flowmeter 13, Gotsukuru valve 14, damper 1
5. Once the gas holder 1 is connected via the V-type water seal valve 18
2, and the recovered converter gas is sent to this gas holder 12, passed through a V-shaped water seal valve 18, and passed through a plurality of ducts 19.
1 and then collected in a power plant gas holder 22. The exhaust gas collected in this power plant gas holder 22 is sent to the power plant boiler. Note that a bypass duct 29 is provided between the outlet side duct 8 of the induced blower 7 and the discharge duct 23 on the inlet side of the three-way valve 9, and a valve 31 is provided in the middle. In addition, the exhaust duct 23 has a pipe 3 connected to the N2 purge B1 system on the downstream side of the valve 25 for adjusting chimney pressure.
8 is connected, and the opening/closing of this piping 38 is controlled by the valve 3.
It is now being carried out by 9.
このように転炉排ガスを発電に用いる場合、転
炉排ガス処理装置は、転炉排ガス用ガスホルダ１
２に一旦排ガスを未燃焼のまゝ回収し、ブースタ
ーフアン２１を利用して発電所用ガスホルダ２２
へ常時定量払い出す構成とされている。 When converter flue gas is used for power generation in this way, the converter flue gas treatment device has a converter flue gas gas holder 1.
2. Once the exhaust gas is collected in an unburned state, it is transferred to the power plant gas holder 22 using the booster fan 21.
It is configured to constantly dispense a fixed amount to.
しかし、転炉排ガス処理装置を上記のような構
成にすると、排ガスは未燃焼の状態で転炉排ガス
用ガスホルダ１２に一旦回収しなければならない
ため、このガスホルダ１２の定期点検時や補修時
あるいはガスホルダ１２内が排ガスで満杯の場合
には、転炉排ガス用ガスホルダ１２に排ガスを回
収することは困難である。 However, when the converter exhaust gas treatment device is configured as described above, the exhaust gas must be collected in an unburned state into the converter exhaust gas gas holder 12, so it is necessary to collect the exhaust gas during periodic inspection or repair of the gas holder 12, or when the gas holder When the inside of the converter 12 is full of exhaust gas, it is difficult to collect the exhaust gas into the converter exhaust gas gas holder 12.
そこで、排ガスを未燃焼のまゝ回収せずに、煙
突２４側に流し、煙突２４の頂部において燃焼さ
せ、大気に放散させている。 Therefore, the exhaust gas is not collected in an unburned state, but instead flows toward the chimney 24, burned at the top of the chimney 24, and dissipated into the atmosphere.
この結果、高カロリーの排ガスを大気に捨てる
こととなり、大きな熱の損失となつていた。 As a result, high-calorie exhaust gas was dumped into the atmosphere, resulting in a large loss of heat.
このような熱の損失を防止しようとして、排ガ
スを未燃焼のまゝ回収しておくガスホルダ１２を
２基設置すれば、設備費が高くつき、採算がとれ
ないという欠点があつた。 In order to prevent such heat loss, if two gas holders 12 were installed to collect the exhaust gas in an unburned state, the equipment cost would be high and it would be unprofitable.
本発明は、以上のような従来の欠点を解消する
ためになされたもので、排ガスの熱量の損失を極
力小さくし、効率よく熱回収を行うことができる
ように構成した転炉排ガス処理装置を提供するこ
とを目的としている。 The present invention was made in order to eliminate the above-mentioned conventional drawbacks, and provides a converter exhaust gas treatment device configured to minimize the loss of heat in exhaust gas and efficiently recover heat. is intended to provide.
以下本発明の一実施例を第２図によつて説明す
る。図中第１図と同一部分には同一符号を付し、
その説明を省略する。 An embodiment of the present invention will be described below with reference to FIG. The same parts in the figure as in Fig. 1 are given the same reference numerals.
The explanation will be omitted.
転炉排ガス用ガスホルダ１２に接続される回収
ダクト１１に該ガスホルダ１２を跨いだ状態で、
バイパスダクト１７が設けられ、そのバイパスダ
クト１７の途中にＶ字水封弁１８が設けられてい
る。回収ダクト１１の途中の回収流量計１３と三
方弁９の他方に連なる排出ダクト２３の途中の放
散流量計２６とは連動関係になされ、ガス流量指
示調節装置２７によつて放散の流量制御が放散流
量調節弁３２によつて行われるようにしてある。 With the recovery duct 11 connected to the converter exhaust gas gas holder 12 straddling the gas holder 12,
A bypass duct 17 is provided, and a V-shaped water seal valve 18 is provided in the middle of the bypass duct 17. The recovery flow meter 13 in the middle of the recovery duct 11 and the dissipation flow meter 26 in the middle of the discharge duct 23 connected to the other side of the three-way valve 9 are in an interlocking relationship, and the gas flow rate control device 27 controls the dissipation flow rate. This is done by a flow control valve 32.
誘引送風機７の出口側ダクト８には、バイパス
ダクト２９の分岐部の手前側において、もう１本
のバイパスダクト３０が設けられ、このバイパス
ダクト３０には放散流量調節弁３２と放散流量止
弁３３とが設けられており、バイパスダクト３０
は弁３４を介して洗浄水側に接続されており、弁
３４は操作器３５によつて開閉制御されるように
なつている。 Another bypass duct 30 is provided in the outlet side duct 8 of the induced blower 7 on the near side of the branching part of the bypass duct 29, and this bypass duct 30 has a diffusion flow control valve 32 and a diffusion flow stop valve 33. A bypass duct 30 is provided.
is connected to the washing water side via a valve 34, and the opening and closing of the valve 34 is controlled by an operating device 35.
また、放散流量止弁３３は操作器３６によつて
開閉制御され、放散流量調整弁３２は操作器３７
及び前記ガス流量指示調節装置２７によつて開閉
制御されるようになつている。 Further, the release flow rate stop valve 33 is controlled to open and close by the operator 36, and the release flow rate adjustment valve 32 is controlled to open and close by the operator 37.
Opening and closing are controlled by the gas flow rate indicating and adjusting device 27.
以上のような構成のもとにおいて、転炉排ガス
用ガスホルダ１２が何らかの理由によつて使用で
きない場合においても、排ガスの回収を効率よく
行おうとするものであるが、ガスホルダ１２によ
つて一度蓄積して平滑化してから排ガスを発電所
用のガスホルダ２２側へ送るため、ガスホルダ１
２から発電所用ガスホルダ２２までの距離も長
く、ガス回収設備の容量は、冷却装置４からガス
ホルダ１２までの設備の容量と比較して約半分で
ある。 With the above configuration, even if the converter exhaust gas gas holder 12 cannot be used for some reason, the exhaust gas is efficiently recovered. Gas holder 1
The distance from the cooling device 2 to the power plant gas holder 22 is also long, and the capacity of the gas recovery equipment is approximately half the capacity of the equipment from the cooling device 4 to the gas holder 12.
したがつて、本発明に於ける設備を設置した場
合においても転炉排ガスの回収時の排ガスを全量
回収することが困難である。 Therefore, even when the equipment according to the present invention is installed, it is difficult to recover the entire amount of exhaust gas when converter exhaust gas is recovered.
しかし、全量ではないにしてもかなりの量の排
ガスを発電所用ガスホルダ２２側へ送り、熱回収
を行うことができる。その具体的な動作は次のよ
うにして行なわれる。 However, even if not the entire amount, a considerable amount of the exhaust gas can be sent to the power plant gas holder 22 side for heat recovery. The specific operation is performed as follows.
すなわち、吹錬開始時と吹錬終了時とにおいて
は、第３図に示す転炉排ガスモードを示す線図
と、第４図に示すタイムチヤート図とからも明ら
かなように、放散流量調整弁３２は開、放散流量
止弁３３も開となつており、N2パージB1系に接
続される配管３８の弁３９も開となつている。 That is, at the start of blowing and at the end of blowing, as is clear from the diagram showing the converter exhaust gas mode shown in FIG. 3 and the time chart shown in FIG. 32 is open, the diffusion flow stop valve 33 is also open, and the valve 39 of the pipe 38 connected to the N 2 purge B1 system is also open.
吹錬開始直後と吹錬終了直前においては、転炉
排ガスは発電用ボイラへ導くには適していないた
め（CO濃度が低いため）、三方弁９の回収弁１０
側を閉じ、ほとんどの排ガスは排出ダクト２３を
通して煙突２４から頂部で燃焼の上大気中に放散
される。 Immediately after the start of blowing and just before the end of blowing, the converter exhaust gas is not suitable for leading to the power generation boiler (because the CO concentration is low), so the recovery valve 10 of the three-way valve 9
With the side closed, most of the exhaust gases are combusted at the top from the chimney 24 through the exhaust duct 23 and then dissipated into the atmosphere.
やがて、吹錬開始後所定時間経過すると、逆に
三方切換弁９の回収弁１０側が開き、回収を開始
しはじめる。同時に放散流量調整弁３２が閉じ始
め、弁３９も閉じN2パージB1系側は遮断され
る。 Eventually, after a predetermined period of time has passed after the start of blowing, the recovery valve 10 side of the three-way switching valve 9 opens, and recovery begins. At the same time, the diffusion flow rate adjustment valve 32 begins to close, and the valve 39 also closes, cutting off the N2 purge B1 system side.
同時に弁２５、三方弁９の排出ダクト２３側も
遮断され、排ガスの回収が開始される。 At the same time, the valve 25 and the exhaust duct 23 side of the three-way valve 9 are also shut off, and recovery of exhaust gas is started.
このとき、ガスホルダ１２が使用可能ならば、
通常の動作が行われるが、使用不能の状態にある
場合には回収弁１０を出た排ガスは回収ダクト１
１、バイパスダクト１７を通つてダクト１９側へ
導かれ、発電所用ガスホルダ２２に一旦蓄えられ
た後に、図示せぬ発電用ボイラ側へ送り出され
る。 At this time, if the gas holder 12 is usable,
Normal operation is carried out, but if it is in an unusable state, the exhaust gas leaving the recovery valve 10 is transferred to the recovery duct 1.
1. The gas is guided to the duct 19 side through the bypass duct 17, and once stored in the power plant gas holder 22, it is sent to the power generation boiler side (not shown).
このようにして転炉排ガス用ガスホルダ１２が
使用不能な場合においても、バイパスダクト１７
を通して排ガスを発電所用ガスホルダ２２に回収
し、この回収した排ガスを発電用ボイラ側へ供給
することができ、従来のように全量を大気中に放
散していた場合に比較すると、はるかに高率の熱
回収を行うことができる。 In this way, even when the converter exhaust gas holder 12 is unusable, the bypass duct 17
The exhaust gas can be collected into the power plant gas holder 22 through the gas holder 22, and the collected exhaust gas can be supplied to the power generation boiler. Heat recovery can be performed.
一方、この熱回収動作の途中において放散流量
止弁３３も閉じ、煙突２４から排出される排ガス
量が著しく減少し始める。すると、N2パージB1
系側の弁３９が再び開き始める。 On the other hand, during this heat recovery operation, the dissipation flow stop valve 33 is also closed, and the amount of exhaust gas discharged from the chimney 24 begins to decrease significantly. Then N 2 purge B 1
The system-side valve 39 begins to open again.
このようにして転炉１からの排熱の回収が行わ
れるが、その途中において排ガス量がブースター
フアン２１の全体としての能力を超える量になつ
た場合には、放散流量調整弁３２、放散流量止弁
３３が開き始め、ブースターフアン２１の能力を
超えた分だけの排ガスは煙突２４側へ導かれ、煙
突の頂部において燃焼の上大気中へ安全に放散さ
れる。 In this way, the exhaust heat from the converter 1 is recovered, but if the amount of exhaust gas exceeds the overall capacity of the booster fan 21 during the recovery process, the emission flow rate regulating valve 32 The stop valve 33 begins to open, and the exhaust gas in excess of the capacity of the booster fan 21 is guided to the chimney 24 side, where it is combusted at the top of the chimney and then safely dissipated into the atmosphere.
煙突２４側から放散される排ガスの量が多くな
ると、再びN2パージB1系の弁３９は閉じ始め
る。 When the amount of exhaust gas released from the chimney 24 side increases, the valve 39 of the N 2 purge B 1 system starts to close again.
このようにして転炉排ガス用ガスホルダ１２が
使用不能な場合において、転炉排ガス用ガスホル
ダ１２の後流側に位置するブースターフアン２１
の能力の範囲内において転炉１からの排ガスを最
大限に有効に回収することができ、これまで浪費
していたエネルギーを極めて高率に回収すること
ができる。 In this way, when the converter exhaust gas gas holder 12 is unusable, the booster fan 21 located on the downstream side of the converter exhaust gas gas holder 12
The exhaust gas from the converter 1 can be recovered as effectively as possible within the capacity of the converter 1, and the energy that was wasted up to now can be recovered at an extremely high rate.
なお、第３図において符号Ａで示す直線はブー
スターフアン２１の能力限界を示すもので、符号
Ｂで示す直線は誘引送風機７の能力限界を示すも
のである。 In FIG. 3, the straight line indicated by the symbol A indicates the capacity limit of the booster fan 21, and the straight line indicated by the symbol B indicates the capacity limit of the induced blower 7.
以上の説明で明らかなように、本発明は、転炉
排ガス用ガスホルダ側に、このガスホルダをバイ
パスするバイパスダクトを設けるとともに、誘引
送風機の出口側と煙突側との間に放散流量調整弁
と放散流量止弁を設け、転炉排ガス用ガスホルダ
の使用不能時においては、排ガスをバイパスダク
トを通して発電所用ガスホルダへ導き、この排ガ
スの量がブースターフアンの能力を超えた場合に
おいては、前記各弁を調整することにより、排ガ
スを煙突側に導き、これを燃焼させて大気中に放
散するようにしたので、従来のように転炉排ガス
用ガスホルダの使用不能時において全排ガスを燃
焼の上大気中に放散する場合と比較し、排ガスの
熱エネルギーを大幅に、有効に回収することがで
きるという優れた効果がある。 As is clear from the above description, the present invention provides a bypass duct for bypassing the gas holder on the gas holder side for converter exhaust gas, and a dissipation flow control valve and a dissipation flow rate adjustment valve between the outlet side of the induced blower and the chimney side. A flow stop valve is installed, and when the converter exhaust gas holder cannot be used, the exhaust gas is guided through the bypass duct to the power plant gas holder. When the amount of exhaust gas exceeds the capacity of the booster fan, the above-mentioned valves are adjusted. By doing so, the exhaust gas is guided to the chimney side, where it is combusted and dissipated into the atmosphere, so when the converter exhaust gas holder cannot be used, unlike conventional methods, all the exhaust gas is combusted and dissipated into the atmosphere. This has an excellent effect in that the thermal energy of the exhaust gas can be recovered significantly and effectively compared to the case where the exhaust gas is used.
第１図は従来の転炉排ガス処理装置の概略図、
第２図〜第４図は本発明の転炉排ガス処理装置の
一実施例を説明するもので、第２図は全体構造の
概略図、第３図は転炉排ガスモードを示す線図、
第４図は各弁の動作を説明するタイムチヤート図
である。
１……転炉、４……冷却器、７……誘引送風
機、８……出口ダクト、９……三方弁、１０……
回収弁、１１……回収ダクト、１２……転炉排ガ
ス用ガスホルダ、１７……バイパスダクト、２１
……ブースターフアン、２２……発電所用ガスホ
ルダ、２３……排出ダクト、２４……煙突、２
９，３０……バイパスダクト、３２……放散流量
調整弁、３３……放散流量止弁。
Figure 1 is a schematic diagram of a conventional converter exhaust gas treatment equipment.
Figures 2 to 4 are for explaining an embodiment of the converter exhaust gas treatment device of the present invention, in which Figure 2 is a schematic diagram of the overall structure, Figure 3 is a diagram showing the converter exhaust gas mode,
FIG. 4 is a time chart explaining the operation of each valve. 1... Converter, 4... Cooler, 7... Induced blower, 8... Outlet duct, 9... Three-way valve, 10...
Recovery valve, 11... Recovery duct, 12... Gas holder for converter exhaust gas, 17... Bypass duct, 21
... Booster fan, 22 ... Gas holder for power plant, 23 ... Exhaust duct, 24 ... Chimney, 2
9, 30... Bypass duct, 32... Diffusion flow rate adjustment valve, 33... Diffusion flow stop valve.
Claims (1)
を有し、この配管系の途中に転炉排ガス用ガスホ
ルダを有し、排ガスを煙突側へ導く配管系を備え
た転炉排ガス処理装置において、前記転炉排ガス
用ガスホルダをバイパスするバイパスダクトを設
けるとともに、排ガスを煙突側へ導く配管系に流
量調整手段を設けたことを特徴とする転炉排ガス
処理装置。1. In a converter exhaust gas treatment device that has a piping system that leads converter exhaust gas to the boiler on the power plant side, has a gas holder for converter exhaust gas in the middle of this piping system, and has a piping system that leads the exhaust gas to the chimney side. A converter exhaust gas treatment device, characterized in that a bypass duct is provided to bypass the converter exhaust gas gas holder, and a flow rate adjustment means is provided in a piping system that guides the exhaust gas to the chimney side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24005783A JPS60131909A (en) | 1983-12-20 | 1983-12-20 | Device for treating converter waste gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24005783A JPS60131909A (en) | 1983-12-20 | 1983-12-20 | Device for treating converter waste gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60131909A JPS60131909A (en) | 1985-07-13 |
| JPS6218602B2 true JPS6218602B2 (en) | 1987-04-23 |
Family
ID=17053839
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24005783A Granted JPS60131909A (en) | 1983-12-20 | 1983-12-20 | Device for treating converter waste gas |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60131909A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102978333B (en) * | 2012-11-19 | 2014-08-27 | 首钢总公司 | System and method for converter gas recovery |
-
1983
- 1983-12-20 JP JP24005783A patent/JPS60131909A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60131909A (en) | 1985-07-13 |
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