JPH057226Y2 - - Google Patents
Info
- Publication number
- JPH057226Y2 JPH057226Y2 JP170088U JP170088U JPH057226Y2 JP H057226 Y2 JPH057226 Y2 JP H057226Y2 JP 170088 U JP170088 U JP 170088U JP 170088 U JP170088 U JP 170088U JP H057226 Y2 JPH057226 Y2 JP H057226Y2
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- hot metal
- temperature
- dust collector
- 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 - Lifetime
Links
- 239000000428 dust Substances 0.000 claims description 35
- 239000002184 metal Substances 0.000 claims description 30
- 229910052751 metal Inorganic materials 0.000 claims description 30
- 238000005338 heat storage Methods 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 8
- 238000011144 upstream manufacturing Methods 0.000 claims description 5
- 238000011084 recovery Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 54
- 238000001035 drying Methods 0.000 description 19
- 239000003795 chemical substances by application Substances 0.000 description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- 229910000805 Pig iron Inorganic materials 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000002040 relaxant effect Effects 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
Landscapes
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Description
【考案の詳細な説明】
〈産業上の利用分野〉
本考案は溶銑予備処理に発生する排ガスの顕熱
を有効に利用することができるようにした溶銑予
備処理時の排ガス処理装置に関するものである。[Detailed description of the invention] <Industrial field of application> The present invention relates to an exhaust gas treatment device during hot metal pretreatment, which makes it possible to effectively utilize the sensible heat of exhaust gas generated during hot metal pretreatment. .
〈従来の技術〉
最近は、高炉でつくられた溶銑を転炉で精錬す
る前に脱Si、脱Ｐ、脱Ｓ等をセンター方式で行う
溶銑予備処理が実施されている。脱Si、脱Ｐでは
予備処理剤として、酸化鉄を主成分とする微粉鉱
石などが大量に使用されており、脱ＳではNa2
CO3（ソーダ灰）の使用が一般化しつつある。<Prior Art> Recently, hot metal preliminary treatment has been carried out in which deSi, P, S, etc. are removed in a central manner before hot metal produced in a blast furnace is refined in a converter. A large amount of fine ore containing iron oxide as a main component is used as a pretreatment agent for Si and P removal, and Na 2
The use of CO 3 (soda ash) is becoming more common.
第４図に従来のセンター方式の溶銑予備処理設
備を示している。第４図においてストレージタン
ク１内に入つている予備処理剤は、打込タンク２
を経てランス３よりキヤリアガスと共に混銑車６
内の溶銑５の中に吹込む。この際混銑車６から多
量の含塵排ガスが発生するのでこれを集塵設備で
吸引している。集塵設備は混銑車６の受銑口直上
に設けた排ガス吸引フード４とこれに連通するダ
クト７と排ガスフアン１０、排ガス集塵機１１と
から構成されている。 Figure 4 shows a conventional center-type hot metal pretreatment facility. In FIG. 4, the pretreatment agent contained in the storage tank 1 is in the charging tank 2.
After that, from lance 3 to mixer car 6 with carrier gas.
It is blown into the hot metal 5 inside. At this time, a large amount of dust-containing exhaust gas is generated from the pig iron mixer car 6, which is sucked by the dust collection equipment. The dust collection equipment is comprised of an exhaust gas suction hood 4 provided directly above the pigtail receiving port of the pig iron mixing car 6, a duct 7 communicating with the duct 7, an exhaust gas fan 10, and an exhaust gas dust collector 11.
予備処理中には、溶銑５の中からCOガスが発
生し、これが燃焼するため通常50〜800℃で高温
ガスになる。このためダクト７の途中にクーラ８
を設け、排ガスの温度を下げている。このクーラ
８で集塵機１１の許容温度まで下げられない場合
は、冷風口９より冷風を取入れ、高温排ガスを混
合して温度を下げ、集塵機１１の許容温度以下に
している。 During the preliminary treatment, CO gas is generated from the hot metal 5, and as it burns, it becomes a high-temperature gas, usually at a temperature of 50 to 800°C. Therefore, the cooler 8 is placed in the middle of the duct 7.
is installed to lower the temperature of exhaust gas. If the temperature cannot be lowered to the allowable temperature of the dust collector 11 with the cooler 8, cold air is taken in from the cold air outlet 9 and mixed with high temperature exhaust gas to lower the temperature to below the allowable temperature of the dust collector 11.
〈考案が解決しようとする課題〉
脱Ｐ処理の一例を上げれば、クーラ８では十分
な冷却ができず、発生する含塵ガスの５〜10倍の
冷風をフード４及び冷風口９から取入れており、
このためフアン１０の電力量は必要以上に大きく
なつており、不経済である。また、クーラ８の替
わりにボイラを入れるものも実施されているが、
排ガス温度のバラツキが多く不安定なため、安定
して運転ができないという欠点があり、含塵排ガ
スの持つ熱エネルギを有効に利用することができ
なかつた。<Problems to be solved by the invention> To give an example of P removal processing, the cooler 8 cannot provide sufficient cooling, so cold air 5 to 10 times the amount of generated dust-containing gas is taken in from the hood 4 and the cold air port 9. Ori,
For this reason, the electric power of the fan 10 is larger than necessary, which is uneconomical. Also, a boiler is installed instead of the cooler 8, but
Since the exhaust gas temperature fluctuates widely and is unstable, it has the disadvantage of not being able to operate stably, and the thermal energy of the dust-containing exhaust gas cannot be used effectively.
ところで予備処理剤として、微粉鉱石などが大
量に使用されているがこれらは、通常原料ヤード
に野積されている。このため10〜15％の水分を含
んでおり、溶銑予備処理に際し、空気輸送するた
めには１％以下に水分を減ずる必要がある。この
ため乾燥装置に微粉鉱石を供して乾燥するのが一
般であるが、この乾燥装置の熱源として燃料ガス
や蒸気が用いられており、省エネルギの点で不経
済であつた。 Incidentally, a large amount of fine ore is used as a pretreatment agent, and these are usually piled up in raw materials yards. For this reason, it contains 10 to 15% water, and in order to transport the hot metal by air during pretreatment, it is necessary to reduce the water content to 1% or less. For this reason, it is common to dry fine ore by providing it to a drying device, but this drying device uses fuel gas or steam as a heat source, which is uneconomical in terms of energy conservation.
第５図に乾燥装置の一例として、流動層乾燥装
置の例を示す。第５図において微粉鉱石はダンプ
カー２５からダンプホツパ２４、急傾斜コンベア
２３、ホツパ１５を経て、流動層乾燥機１４に導
かれて乾燥されるが省エネルギの点で問題があつ
た。ここで、乾燥された微粉鉱石はホツパ１７に
移送されるがその一部は気流とともに集塵機１６
に導かれ、ここで集塵されてホツパ１７に貯蔵さ
れる。ホツパ１７に貯蔵された微粉鉱石はタンク
ローリ２６によつて搬送され第４図に示すストー
ジタンク１に搬送される。 FIG. 5 shows an example of a fluidized bed drying apparatus as an example of the drying apparatus. In FIG. 5, fine ore is guided from a dump truck 25 through a dump hopper 24, a steeply inclined conveyor 23, and a hopper 15 to a fluidized bed dryer 14 for drying, but this poses a problem in terms of energy conservation. Here, the dried fine powder ore is transferred to the hopper 17, but a part of it is transferred to the dust collector 16 along with the airflow.
The dust is collected here and stored in the hopper 17. The fine ore stored in the hopper 17 is transported by a tank truck 26 to the storage tank 1 shown in FIG. 4.
特開昭60−56008号には脱珪剤の乾燥用熱源と
して溶銑予備処理時に発生する排ガスを直接脱珪
剤の中に送り込む例が開示されているが、前述の
ように温度変動範囲が50〜800℃に達する温度不
安定排ガスであり、乾燥量を多くすると脱水効果
が不十分になるという問題点があつた。 JP-A No. 60-56008 discloses an example in which the exhaust gas generated during pretreatment of hot metal is directly fed into the desiliconizing agent as a heat source for drying the desiliconizing agent, but as mentioned above, the temperature fluctuation range is 50°C. It is a temperature unstable exhaust gas that reaches ~800℃, and there was a problem that the dehydration effect would be insufficient if the amount of drying was increased.
本考案は前記従来の問題点を解消し、溶銑予備
処理時に発生する温度変動範囲の大きい排ガスの
顕熱を有効に回収することができる溶銑処理時の
排ガス処理装置を提供することを目的とするもの
である。 The purpose of the present invention is to solve the above-mentioned conventional problems and provide an exhaust gas treatment device during hot metal processing that can effectively recover the sensible heat of exhaust gas that has a large temperature fluctuation range and is generated during hot metal pretreatment. It is something.
〈課題を解決するための手段〉
上記の目的を達成するための本考案の構成を実
施例に対応する第１図を用いて説明すると、本考
案は溶銑予備処理容器６から発生する排ガスを導
く排ガス経路７に上流側から順次排ガス吸引フー
ド４、排ガス集塵機１１、排ガスフアン１０およ
びスタツク２１を配設した溶銑予備処理時の排ガ
ス処理装置において、上記の排ガス吸引フード４
と排ガス集塵機１１とを連結する排ガス経路７に
上流側からシリーズに排ガス温度調整用の蓄熱器
２２および空気との間接熱交換によつて排ガスを
冷却するプレート式熱交換器２７を配設する一
方、上記プレート式熱交換器２７で昇温された空
気を熱回収装置１４に供給するように構成したこ
とを特徴とするものである。<Means for Solving the Problems> The configuration of the present invention for achieving the above object will be explained using FIG. 1 corresponding to the embodiment. In an exhaust gas treatment apparatus for pre-processing hot metal, the exhaust gas suction hood 4, the exhaust gas dust collector 11, the exhaust gas fan 10, and the stack 21 are sequentially arranged in the exhaust gas path 7 from the upstream side.
A heat storage device 22 for adjusting the exhaust gas temperature and a plate heat exchanger 27 for cooling the exhaust gas by indirect heat exchange with the air are arranged in series from the upstream side in the exhaust gas path 7 connecting the exhaust gas dust collector 11 and the exhaust gas dust collector 11. , is characterized in that the air heated by the plate heat exchanger 27 is supplied to the heat recovery device 14.
第１図では乾燥設備として、流動層乾燥設備を
使用したものを示している。多数の金属製プレー
トで仕切られ、排ガス通路と冷却用空気通路を交
互に形成して間接熱交換する強制空冷のプレート
式熱交換器２７は冷却用空気ダクト３２を介して
熱風炉２８に連通されており、さらに熱風炉２８
は流動層乾式乾燥機１４に連通されている。 In FIG. 1, fluidized bed drying equipment is used as the drying equipment. A forced air-cooled plate heat exchanger 27 that is partitioned by a number of metal plates and exchanges indirect heat by alternately forming exhaust gas passages and cooling air passages is communicated with the hot air stove 28 via a cooling air duct 32. In addition, there are 28 hot air stoves.
is connected to a fluidized bed dryer 14.
一方、微粉鉱石はダンプカー２５からダンプホ
ツパ２４、急傾斜コンベア２３、ホツパ１５を経
て、前記流動層乾燥機１４に導かれ、流動層乾燥
機１４より排出されホツパ１７に貯蔵される。こ
こで、乾燥された微粉鉱石の一部は気流とともに
集塵機１６に導かれ、ここで集塵されてホツパ１
７に貯蔵される。ホツパ１７に貯蔵された微粉鉱
石には、ホツパ１７の下に設置した輸送タンク１
８に導かれ、空気輸送によつて予備処理設備のス
トレージタンク１に輸送する。 On the other hand, the fine ore is guided from the dump truck 25 to the fluidized bed dryer 14 via the dump hopper 24, the steeply inclined conveyor 23, and the hopper 15, and is discharged from the fluidized bed dryer 14 and stored in the hopper 17. Here, a part of the dried fine ore is guided to the dust collector 16 along with the airflow, where it is collected and collected in the hopper 16.
7 is stored. The fine ore stored in the hopper 17 is stored in the transportation tank 1 installed below the hopper 17.
8 and transported by pneumatic transport to the storage tank 1 of the pretreatment facility.
集塵機１６と乾燥用ガスを吸引するフアン２０
をダクトで連通し、その間にダンパ１９を設置す
る。フアン２０で吸引された乾燥用ガスはスタツ
ク２１より排出される。一方、溶銑予備処理設備
のプレート式熱交換器２７の冷却用空気ダクト３
２にはダンパ３１を設置する。 Dust collector 16 and fan 20 that sucks drying gas
are connected through a duct, and a damper 19 is installed between them. The drying gas sucked in by the fan 20 is discharged from the stack 21. On the other hand, the cooling air duct 3 of the plate heat exchanger 27 of the hot metal pretreatment equipment
A damper 31 is installed at 2.
また第１図では、乾燥用ガスをスタツク２１か
ら排出する例を示したが、スタツク２１を廃し、
フアン２０の下流側から直接に或いはフアン２０
も廃し、ダンパ１９の下流側から直接に集塵機１
１の上流側ダクト７に接続し、微粉鉱石中の微粒
を排ガス集塵器１１で捕集するようにしてもよ
い。 In addition, although FIG. 1 shows an example in which the drying gas is discharged from the stack 21, the stack 21 is eliminated and
Directly from the downstream side of the fan 20 or from the fan 20
dust collector 1 directly from the downstream side of damper 19.
The exhaust gas dust collector 11 may be connected to the upstream duct 7 of No. 1 to collect fine particles in the fine ore.
ここでは乾燥設備を例にとつて説明したが、第
２図に示すように、溶銑予備処理設備の蓄熱器２
２によつて、排ガス温度を緩和、平均化した後、
プレート式熱交換器２７によつて熱交換した清浄
空気ダクト３２をボイラ１４′に連通し、蒸気を
安定生産するようにしてもよい。 Here, we have explained the drying equipment as an example, but as shown in Fig. 2, the heat storage device 2 of the hot metal pretreatment equipment
2, after relaxing and averaging the exhaust gas temperature,
The clean air duct 32 that has undergone heat exchange with the plate heat exchanger 27 may be communicated with the boiler 14' to stably produce steam.
〈作用〉
脱Si、脱Ｐなどの溶銑予備処理に際して発生す
る高温の含塵ガスをシリーズに連結した蓄熱器と
プレート式熱交換器に導き、まず蓄熱器により排
ガス温度を緩和、平均化し、その後蓄熱器の後流
側に設けたプレート式熱交換器で、冷却用清浄空
気と熱交換することにより高温の平均化した清浄
空気を発生させる。<Operation> High-temperature dust-containing gas generated during pre-treatment of hot metal such as deSi and deP is guided to a heat storage and a plate heat exchanger connected in series. First, the temperature of the exhaust gas is moderated and averaged by the heat storage, and then A plate heat exchanger installed on the downstream side of the heat storage device generates clean air with an averaged high temperature by exchanging heat with clean air for cooling.
この空気の一部または全部を溶銑予備処理剤の
乾燥熱源用、あるいはボイラ用に利用するもので
あり、これによつて溶銑予備処理剤の乾燥燃料の
削減、或いはボイラの安定操業及びボイラチユー
ブの摩耗防止を図る。 Part or all of this air is used as a drying heat source for the hot metal pretreatment agent or for the boiler, thereby reducing the amount of drying fuel for the hot metal pretreatment agent, or improving the stable operation of the boiler and the boiler tube. To prevent wear.
〈実施例〉
以下図面に基づいて本考案の実施例を説明す
る。<Examples> Examples of the present invention will be described below based on the drawings.
第１図は本考案の実施例を示す全体構成図であ
り、溶銑予備処理剤としての乾燥された微粉鉱石
は、ストレージタンク１より打込タンク２に導か
れ、空気輸送にてランス３より混銑車６中の溶銑
５中に吹込まれる。第３図に示すように、この時
発生した温度変動範囲が50〜800℃にも及び含塵
排ガスは排ガス吸引フード４より吸引されダクト
７を経て、蓄熱器２２に導入され蓄熱器２２の出
口で350〜500℃に緩和、平均化されたのちプレー
ト式熱交換器２７にて160℃以下に冷却される。
そして集塵器１１で集塵されたのち溶銑予備処理
用の排ガスフアンで吸引されスタツク２１から排
出される。 FIG. 1 is an overall configuration diagram showing an embodiment of the present invention. Dried fine powder ore as a hot metal pretreatment agent is led from a storage tank 1 to a charging tank 2, and is pneumatically transported from a lance 3 to a mixed pig iron. It is blown into the hot metal 5 in the car 6. As shown in FIG. 3, the temperature fluctuation range that occurred at this time was as much as 50 to 800°C, and the dust-containing exhaust gas was sucked through the exhaust gas suction hood 4, passed through the duct 7, was introduced into the heat storage device 22, and was then introduced into the heat storage device 22 at the outlet of the heat storage device 22. After being moderated and averaged to 350 to 500°C, it is cooled to 160°C or less in a plate heat exchanger 27.
After the dust is collected by the dust collector 11, it is sucked in by an exhaust gas fan for hot metal pretreatment and discharged from the stack 21.
一方、プレート式熱交換器用フアン３０から供
給された冷却用空気は、プレート式熱交換器２７
にて熱交換され、300〜400℃に昇温されたのち流
動層乾燥機１４用の熱風炉２８に導かれる。熱風
炉２８でこの高温空気を使つて燃料ガスを燃焼し
た乾燥用ガスは、流動層乾燥機１４に導かれ、こ
こで水分10〜15％を含む微粉鉱石１２を乾燥させ
たのち、ホツパ１７に導かれる。ここで流動層乾
燥機１４における流動層化に際し、ガス中に含ま
れた微粉鉱石の一部が集塵機１６に導かれて集塵
され、集塵された微粉鉱石は集塵機１６からホツ
パ１７に供給される。集塵機１６から排出された
気流はダンパ１９で流量を調節しながら乾燥機用
集塵フアン２０を介してスタツク２１から排出さ
れる。このようにして乾燥された流動層乾燥機１
４中の微粉鉱石はホツパ１７へ供給されたのち輸
送タンク１８を介してストレージタンク１に輸送
され溶銑予備処理剤として貯蔵される。 On the other hand, the cooling air supplied from the plate heat exchanger fan 30 is transferred to the plate heat exchanger 27.
After exchanging heat and increasing the temperature to 300 to 400° C., the air is led to a hot blast furnace 28 for the fluidized bed dryer 14. The drying gas obtained by burning the fuel gas using this high-temperature air in the hot blast furnace 28 is led to the fluidized bed dryer 14, where it dries the fine ore 12 containing 10 to 15% moisture, and then is sent to the hopper 17. be guided. When the fluidized bed is formed in the fluidized bed dryer 14, a part of the fine ore contained in the gas is guided to the dust collector 16 and collected, and the collected fine ore is supplied from the dust collector 16 to the hopper 17. Ru. The airflow discharged from the dust collector 16 is discharged from the stack 21 via the dryer dust collection fan 20 while adjusting the flow rate with a damper 19. Fluidized bed dryer 1 dried in this way
After being supplied to the hopper 17, the fine ore in the hopper 17 is transported to the storage tank 1 via the transport tank 18 and stored as a hot metal pretreatment agent.
排ガス集塵機１１に導かれる排ガスがプレート
式熱交換器２７の出口で許容温度（ここでは160
℃）以下にならなかつた場合は、冷風口９よりダ
ンパ３４で流量を調整しながら冷風を取入れ許容
温度以下にしたのち集塵機１１で除塵するように
なつている。 The exhaust gas guided to the exhaust gas dust collector 11 reaches the allowable temperature (here, 160°C) at the outlet of the plate heat exchanger 27.
℃), cold air is introduced from the cold air outlet 9 while adjusting the flow rate with a damper 34 to bring the temperature below the permissible temperature, and then the dust collector 11 removes dust.
乾燥機１４では流動化及び乾燥に必要な熱量に
なるようにダクト３２より、熱風炉２８に流れる
高温空気の量を制御する必要がある。このため高
温空気の温度と流量を検知し、乾燥機１４に供給
される微粉鉱石の量を水分に応じて熱風炉２８を
介して、乾燥機１４に流れるガス量が最適になる
ようダンパ３１を制御する。 In the dryer 14, it is necessary to control the amount of high-temperature air flowing from the duct 32 to the hot air stove 28 so that the amount of heat is required for fluidization and drying. For this purpose, the temperature and flow rate of the high-temperature air are detected, and the amount of fine ore supplied to the dryer 14 is adjusted according to the moisture content. Control.
第１図では乾燥機１４が流動層乾燥機の例を示
したが気流乾燥機等、高温のガスが使用できる乾
燥機ならば他の機種でもよい。また混銑車６で実
施する溶銑予備処理の例を示したが、高炉の鋳床
で実施する鋳床脱Si、鋳床脱Ｐ、鋳床脱Ｓにも適
用できる。 Although FIG. 1 shows an example in which the dryer 14 is a fluidized bed dryer, it may be of any other type as long as it can use high-temperature gas, such as a flash dryer. Further, although an example of hot metal pretreatment carried out in the pig iron mixing car 6 has been shown, it can also be applied to castbed desiliconization, castbed desulfurization, and castbed desistance carried out in the castbed of a blast furnace.
蓄熱器２２は熱容量を大きく持つものであれば
よく、蓄熱レンガ等を備えるもので良いが、望ま
しくはここで使用する蓄熱器２２としては鉄板を
排ガス流入方向に平行に多数並べて構成したもの
が良い。 The heat storage device 22 may be of any type as long as it has a large heat capacity, and may include heat storage bricks, etc., but it is preferable that the heat storage device 22 used here is constructed by arranging a large number of iron plates parallel to the exhaust gas inflow direction. .
その理由は、排ガス中には酸化鉄、処理剤等の
粉塵が混入してくるためであり、鉄板等で蓄熱器
を構成すれば、衝撃を加えることにより粉塵の除
去ができ保守が容易となる利点があるからであ
る。その作用は、高温排ガス時には鉄板は排ガス
による加熱を受け、低温排ガス時には排ガスは鉄
板側から加熱を受け、通過後の排ガス温度が均一
化される。従つて、熱交換器２７における排ガス
との熱交換によつて比較的安定した高温の空気を
得ることができることになる。 The reason for this is that dust from iron oxide, processing agents, etc. gets mixed into the exhaust gas, and if the heat storage device is made of iron plates, etc., the dust can be removed by applying impact, making maintenance easier. This is because there are advantages. The effect is that when high-temperature exhaust gas is present, the iron plate is heated by the exhaust gas, and when low-temperature exhaust gas is present, the exhaust gas is heated from the iron plate side, and the temperature of the exhaust gas after passing through it is made uniform. Therefore, by exchanging heat with the exhaust gas in the heat exchanger 27, relatively stable high temperature air can be obtained.
第２図は本考案の他の実施例を示す全体構成図
であり、第１図に示す流動層乾燥機１４の代わり
にボイラ１４′を設置したものである。プレート
式熱交換器２７にて熱交換された300〜400℃の高
温空気をボイラ３１に導いて蒸気を回収するもの
であり、ボイラ３１からスタツク２１へ排出され
る。この場合は約10T／Ｈの蒸気が回収できる。 FIG. 2 is an overall configuration diagram showing another embodiment of the present invention, in which a boiler 14' is installed in place of the fluidized bed dryer 14 shown in FIG. High-temperature air of 300 to 400°C, which has been heat exchanged in the plate heat exchanger 27, is guided to the boiler 31 to recover steam, and is discharged from the boiler 31 to the stack 21. In this case, about 10 T/H of steam can be recovered.
〈考案の効果〉
本考案は上記の構成であるから下記の利点があ
る。<Effects of the invention> Since the present invention has the above configuration, it has the following advantages.
(1) 溶銑予備処理時に発生する排ガスの温度が変
動しても安定して熱回収することができる。(1) Heat can be recovered stably even if the temperature of the exhaust gas generated during hot metal pretreatment fluctuates.
(2) 溶銑予備処理に際し、従来捨てていた熱源を
一部又は全部粉鉱石の乾燥に使用するので、新
たな熱源を節約できる。(2) During hot metal pretreatment, a part or all of the heat source that was previously discarded is used for drying the fine ore, so new heat sources can be saved.
(3) 溶銑予備処理量の増減に合わせて、予備処理
剤（乾燥処理量）の供給量増減を容易に調整す
ることができる。(3) The supply amount of the pretreatment agent (drying amount) can be easily adjusted in accordance with the increase or decrease in the amount of hot metal pretreatment.
(4) 溶銑予備処理に際し、従来捨てていた熱源を
安定して蒸気回収に充当することができる。(4) During hot metal pretreatment, heat sources that were previously discarded can be stably used for steam recovery.
第１図は本考案の実施例を示す全体構成図、第
２図は本考案の他の実施例を示す全体構成図、第
３図は排ガス温度の経時変化を示すグラフ、第４
図は従来例を示す全体構成図、第５図は粉鉱石の
予熱装置の従来例を示す全体構成図である。
１……ストレージタンク、３……ランス、４…
…集塵用フード、６……混銑車、７……ダクト、
１１……排ガス用集塵機、１４……流動層乾燥
機、１６……集塵機、１７……ホツパ、２２……
蓄熱器、２７……プレート熱交換器、２８……熱
風炉、３０……フアン。
Figure 1 is an overall configuration diagram showing an embodiment of the present invention, Figure 2 is an overall configuration diagram showing another embodiment of the invention, Figure 3 is a graph showing changes in exhaust gas temperature over time, and Figure 4
FIG. 5 is an overall configuration diagram showing a conventional example, and FIG. 5 is an overall configuration diagram showing a conventional example of a powder ore preheating device. 1...storage tank, 3...lance, 4...
...Dust collection hood, 6...Pig mixer car, 7...Duct,
11... Dust collector for exhaust gas, 14... Fluidized bed dryer, 16... Dust collector, 17... Hopper, 22...
Heat storage device, 27...Plate heat exchanger, 28...Hot stove, 30...Fan.
Claims (1)
ガス経路に上流側から順次排ガス吸引フード、排
ガス集塵機、排ガスフアンおよびスタツクを配設
した溶銑予備処理時の排ガス処理装置において、
上記の排ガス吸引フードを排ガス集塵機とを連結
する排ガス経路の上流側からシリーズに排ガス温
度調整用の蓄熱器および空気との間接熱交換によ
つて排ガスを冷却するプレート式熱交換器を配設
する一方、上記プレート式熱交換器で昇温された
空気を熱回収装置に供給するように構成したこと
を特徴とする溶銑予備処理時の排ガス処理装置。 In an exhaust gas treatment device for hot metal pretreatment, an exhaust gas suction hood, an exhaust gas dust collector, an exhaust gas fan, and a stack are sequentially arranged from the upstream side in an exhaust gas path that guides exhaust gas generated from a hot metal pretreatment container.
A heat storage device for adjusting exhaust gas temperature and a plate heat exchanger for cooling exhaust gas through indirect heat exchange with air are installed in series from the upstream side of the exhaust gas path that connects the above exhaust gas suction hood to the exhaust gas dust collector. On the other hand, an exhaust gas treatment device for hot metal pretreatment, characterized in that the air heated by the plate heat exchanger is supplied to a heat recovery device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP170088U JPH057226Y2 (en) | 1988-01-12 | 1988-01-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP170088U JPH057226Y2 (en) | 1988-01-12 | 1988-01-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01106548U JPH01106548U (en) | 1989-07-18 |
| JPH057226Y2 true JPH057226Y2 (en) | 1993-02-24 |
Family
ID=31201815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP170088U Expired - Lifetime JPH057226Y2 (en) | 1988-01-12 | 1988-01-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH057226Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101160298B1 (en) * | 2007-12-21 | 2012-06-28 | 재단법인 포항산업과학연구원 | Improvement unit of cooling efficiency of static cooler for gas through charging hood of converter in steel making plant |
-
1988
- 1988-01-12 JP JP170088U patent/JPH057226Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01106548U (en) | 1989-07-18 |
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