JPS5980730A - Method for recovering sensible heat from steel strip coil - Google Patents
Method for recovering sensible heat from steel strip coilInfo
- Publication number
- JPS5980730A JPS5980730A JP18924982A JP18924982A JPS5980730A JP S5980730 A JPS5980730 A JP S5980730A JP 18924982 A JP18924982 A JP 18924982A JP 18924982 A JP18924982 A JP 18924982A JP S5980730 A JPS5980730 A JP S5980730A
- Authority
- JP
- Japan
- Prior art keywords
- molten salt
- heat
- coil
- steel strip
- tank
- 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.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/62—Quenching devices
- C21D1/63—Quenching devices for bath quenching
- C21D1/64—Quenching devices for bath quenching with circulating liquids
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は、帯鋼コイルの保有する顕熱な回収する方法
に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for recovering sensible heat possessed by a steel strip coil.
熱間圧延機によって製造される帯鋼や、熱処理炉で処理
された冷延帯鋼はコイル状に巻取られ、その温度は、4
00℃〜800℃である。この顕熱は現在全く利用され
ず、空冷または水冷により放散されている。Steel strips manufactured by hot rolling mills and cold rolled steel strips treated in heat treatment furnaces are wound into coils, and the temperature is 4.
00°C to 800°C. This sensible heat is currently not utilized at all and is dissipated by air or water cooling.
この熱を回収する方法として、コイルを水槽に漬け、コ
イルの顕熱を、70℃〜100℃ の温水として回収す
るプロセスが提案されているが、得られる温水の熱ポテ
ンシヤルが小さく、温水の利用先が少ないため実用化例
が少くない。この場合、加圧状態で操作すれば100℃
以上の熱水または蒸気が得られる可能性があるが、設備
技術上の困難を伴うので実現が難しい。As a method of recovering this heat, a process has been proposed in which the coil is immersed in a water bath and the sensible heat of the coil is recovered as hot water of 70°C to 100°C, but the thermal potential of the hot water obtained is small and the use of hot water is difficult. Since there are only a few points, there are many practical applications. In this case, if operated under pressure, the temperature will rise to 100°C.
Although it is possible to obtain hot water or steam of the above amount, it is difficult to realize because it involves difficulties in equipment technology.
本発明は、帯鋼コイルの顕熱な回収するに当リ、熱媒体
として溶融塩を用いることにより、常圧下の操作で高ポ
テンシャルの熱を回収するものである。The present invention recovers high potential heat by operating under normal pressure by using molten salt as a heat medium when recovering sensible heat from a steel strip coil.
本発明の要旨は、帯鋼をコイルのま\一旦1り0℃〜4
00℃の溶融塩槽≦二装入して、コイル顕熱を溶融塩に
移し、この溶融塩をボイラーまたは熱交換器に導いて蒸
気の発生または熱媒体の加熱を行うことである。この温
度の溶融塩は、常圧下で液体であり沸騰しないので、帯
鋼コイルを装入する溶融塩槽は、大気圧に開放したまま
操作することができる。この方法を実施するために必要
な装置は溶融塩槽、溶融塩移送配管系、熱交換器(また
はボイラ)及び若干の付帯設備であり、簡易な設備構成
で熱回収を行うことができるものである。The gist of the present invention is to heat the strip steel into a coil once from 0°C to 4°C.
A molten salt tank at 00°C≦2 is charged, the sensible heat of the coil is transferred to the molten salt, and the molten salt is introduced into a boiler or a heat exchanger to generate steam or heat a heat medium. Since the molten salt at this temperature is liquid under normal pressure and does not boil, the molten salt tank into which the steel strip coil is charged can be operated while being open to atmospheric pressure. The equipment required to implement this method is a molten salt tank, a molten salt transfer piping system, a heat exchanger (or boiler), and some incidental equipment, and heat recovery can be performed with a simple equipment configuration. be.
従来金属ストリップを巻き戻し、先端から順次溶融塩槽
に浸漬して熱回収を行なう方法は提案されているが、こ
れらの方法では帯鋼コイルの巻きほどき装置、巻き取り
装置、帯鋼接合装置、案内ロール、ロール駆動装置、ボ
イラ等の多くの複雑な機器設備を必要とする欠点がある
。Conventionally, methods have been proposed in which the metal strip is unwound and immersed in a molten salt bath sequentially from the tip to perform heat recovery. It has the disadvantage that it requires a lot of complicated equipment such as guide rolls, roll drives, boilers, etc.
本発明では、コイルを巻きほどかずに熱回収を行なうの
で、必要となる設備も前述のよう(二簡易な設備で達成
される。In the present invention, since heat recovery is performed without unwinding the coil, the necessary equipment can be achieved with the simple equipment described above.
以下本発明を図面に示す実施例に基づいて具体的に説明
する。The present invention will be specifically described below based on embodiments shown in the drawings.
第1図は、本発明の基本的構成を示してVAる゛。FIG. 1 shows the basic configuration of the present invention.
溶融塩槽2(二は溶融塩1が満たされ、ポンプ4によっ
て溶融塩槽2と熱交換器5との間を循環している。これ
らの槽や機器は、複数個設けても良い。図に示されてい
ないトングによって、コイル3を溶融塩槽2に装入する
。コイル3の顕熱によって溶融塩1が加熱され、溶融塩
1は熱交換器またはボイラー5(以下熱交換器等と記す
)において、給水または熱媒体6(以下給水等と記す)
を加熱し、蒸気または高温の熱媒体7(以下蒸気等と記
す)を発生する。この蒸気等は加熱用その他の用途に用
いられる。熱回収が完了すると、図に示されていないト
ングによってコイルが搬出され、新しいコイルが装入さ
れる。Molten salt tank 2 (2 is filled with molten salt 1, which is circulated between molten salt tank 2 and heat exchanger 5 by pump 4. A plurality of these tanks and devices may be provided. The coil 3 is charged into the molten salt tank 2 using tongs not shown in the figure.The molten salt 1 is heated by the sensible heat of the coil 3, and the molten salt 1 is transferred to a heat exchanger or boiler 5 (hereinafter referred to as a heat exchanger etc.). ), water supply or heat medium 6 (hereinafter referred to as water supply, etc.)
is heated to generate steam or high temperature heat medium 7 (hereinafter referred to as steam etc.). This steam etc. is used for heating and other purposes. When heat recovery is complete, the coil is removed by tongs (not shown) and a new coil is inserted.
第2図は本発明の他の実施例である。溶融塩槽14及び
15には、溶融基筒、21が満たされ、ポンプ16.1
7によって循環している。図に示されていないトングに
よって、高温の帯鋼コイル18を槽14に装入する。槽
14の中で顕熱の半分程度を回収し、やや温度の低下し
たコイルを槽15に移し、残りの顕熱を回収する。この
様にすると、槽14の中の溶融基筒は高温になり、槽1
5の中の溶融塩はそれより低い温度C二なる。以下槽1
4を高温槽、槽15を中温槽と呼ぶ。FIG. 2 shows another embodiment of the invention. The molten salt tanks 14 and 15 are filled with a molten base cylinder, 21, and a pump 16.1
It is circulating by 7. The hot steel strip coil 18 is introduced into the tank 14 by means of tongs (not shown). Approximately half of the sensible heat is recovered in the tank 14, and the coil whose temperature has decreased slightly is transferred to the tank 15, where the remaining sensible heat is recovered. In this way, the melting base cylinder in the tank 14 becomes high temperature, and the melting base cylinder in the tank 14 becomes hot.
The molten salt in 5 has a lower temperature C2. Below tank 1
4 is called a high temperature tank, and tank 15 is called a medium temperature tank.
給水等9は熱交換器等13によって予熱され、更に熱交
換器等12によって高温に加熱されて、蒸気等11にな
る。この方法では、前記方法に較べて高温の蒸気等を得
ることができる。The feed water etc. 9 is preheated by a heat exchanger etc. 13 and further heated to a high temperature by a heat exchanger etc. 12 to become steam etc. 11. With this method, higher temperature steam etc. can be obtained compared to the above method.
第2図では槽は2段であるが、3段以上の多段にしても
良い。また、多段の槽のかわりに長い単一の槽とし、溶
融塩を低温部から高温部に向けて連続して流し、コイル
を高温部から低温部に向けて連続的に移送せしめても良
い。その場合には、第4図に例示した構成になる。In FIG. 2, the tank has two stages, but it may have three or more stages. Furthermore, instead of a multistage tank, a single long tank may be used, and the molten salt may be continuously flowed from the low temperature section to the high temperature section, and the coil may be continuously transferred from the high temperature section to the low temperature section. In that case, the configuration is as illustrated in FIG.
この長い単一の槽の中に、低温部と高温部の溶融塩の混
合を防ぐために仕切壁を設置しても良い。第4図におい
て、あはコイル移送用のコンベアである。A partition wall may be installed in this long single tank to prevent mixing of the molten salt in the low temperature section and the high temperature section. In FIG. 4, A is a conveyor for transferring coils.
なお第2図における熱交換器等13は省略しても良い。Note that the heat exchanger etc. 13 in FIG. 2 may be omitted.
その場合、ポンプ17を省略して、槽15と槽14の間
に樋または連通管を設けて、溶融塩を自然流通させても
良い。In that case, the pump 17 may be omitted and a gutter or a communication pipe may be provided between the tanks 15 and 14 to allow natural flow of the molten salt.
第3図はさらに他の実施例を示している。溶融塩槽5の
中に、熱交換器またはボイラーの伝熱管部分nが配置さ
れている。この方法においては、溶融塩の循環配管系は
必ずしも設置する必要はない。FIG. 3 shows yet another embodiment. In the molten salt bath 5 a heat exchanger or heat exchanger tube section n of a boiler is arranged. In this method, it is not necessary to install a molten salt circulation piping system.
本発明者らは、600℃の帯鋼コイルを溶融塩槽で30
0℃まで冷却し、この間の温度差に相当する顕熱を回収
することを試験した。The present inventors tested a 600°C steel strip coil in a molten salt bath for 30°C.
A test was conducted to cool down to 0°C and recover sensible heat corresponding to the temperature difference during this time.
溶融塩は硝酸カリウム53%、硝酸ナトリウム7%、亜
硝酸ナトリウム40%の混合塩を用いた。The molten salt used was a mixed salt of 53% potassium nitrate, 7% sodium nitrate, and 40% sodium nitrite.
この混合塩の融点は140℃であり、160℃以上の温
度で、通常の液体として取扱うことができる。この実施
例では200℃で使用した。The melting point of this mixed salt is 140°C, and it can be handled as a normal liquid at temperatures above 160°C. In this example, it was used at 200°C.
熱間圧延帯鋼コイルを用い、600℃から300℃まで
の熱回収を行った。コイル1本当りの所要時間は3時間
である。顕熱の回収量はコイル1を当り180 M、T
であり、600℃のコイルの顕熱350 M、T /
t の51チが回収されたことになる。Heat was recovered from 600°C to 300°C using a hot rolled steel strip coil. The time required for one coil is 3 hours. The amount of sensible heat recovered is 180 M, T per coil 1.
and the sensible heat of the coil at 600°C is 350 M, T/
This means that 51 pieces of t have been collected.
以上に述べた如く、本発明は簡便な設備で帯鋼コイルの
顕熱を回収できる実用性の高い顕熱回収方法である。ま
た、この方法(二おいては、溶融塩が蓄熱材としての役
割を果すため、帯鋼コイルの生産が断続的に行われても
、蒸気または高温熱媒体を連続的に発生することができ
、この意味でも廃熱回収方法として優れたものである。As described above, the present invention is a highly practical sensible heat recovery method that can recover sensible heat from a steel strip coil with simple equipment. In addition, in this method (2), the molten salt plays the role of a heat storage material, so even if the production of steel strip coils is carried out intermittently, steam or high-temperature heat transfer medium can be continuously generated. In this sense as well, it is an excellent method for recovering waste heat.
第1図は本発明の基本的構成の説明図、第2図は本発明
の他の実施例の説明図、第3図は本発明の更に他の実施
例の説明図、第4図は第2図に示す実施例の変形の説明
図である。
1;溶融塩 2;溶融塩槽 3;帯鋼コイル 4
;ポンプ 5;熱交換器(またはボイラー) 6:
給水(または熱媒体)7;水蒸気(または高温熱媒体)
8:弁9;給水(または熱媒体)10;中温の水(
または水蒸気または熱媒体)11;水蒸気(または高温
熱媒体)12;熱交換器(またはボイラー)13:熱交
換器(またはボイラー)14.15;溶融塩槽 16
.17;ポンプ18.19;帯鋼コイル 加、21;
溶融塩22:給水(または熱媒体)23;水蒸気(また
は高温熱媒体)24;溶融塩 乙;溶融塩槽 26
;帯鋼コイル n;伝熱管間;コンベア
第1@
竿2」
第3回
第4図
〃FIG. 1 is an explanatory diagram of the basic configuration of the present invention, FIG. 2 is an explanatory diagram of another embodiment of the invention, FIG. 3 is an explanatory diagram of still another embodiment of the invention, and FIG. 4 is an explanatory diagram of another embodiment of the invention. FIG. 2 is an explanatory diagram of a modification of the embodiment shown in FIG. 2; 1; Molten salt 2; Molten salt tank 3; Steel strip coil 4
;Pump 5;Heat exchanger (or boiler) 6:
Water supply (or heat medium) 7; Steam (or high temperature heat medium)
8: Valve 9; Water supply (or heat medium) 10; Medium temperature water (
or steam or heat medium) 11; steam (or high temperature heat medium) 12; heat exchanger (or boiler) 13: heat exchanger (or boiler) 14.15; molten salt tank 16
.. 17; Pump 18.19; Steel strip coil added, 21;
Molten salt 22: Water supply (or heat medium) 23; Steam (or high temperature heat medium) 24; Molten salt B: Molten salt tank 26
;Strip coil n;Between heat transfer tubes;Conveyor No. 1 @ Rod 2" 3rd issue Fig. 4
Claims (1)
イルの顕熱を溶融塩に移行せしめ、該溶融塩の保有熱を
回収することを特徴とする帯鋼コイルの顕熱回収方法。 2 複数の溶融塩槽又は長尺の単一溶融槽のより高温の
溶融塩部に、順次帯鋼をコイルの状態で浸漬し、該コイ
ルをより低温溶融塩部に移すか、又は低温の溶融塩をよ
り高温溶融塩側へ移送して、より高温の溶融塩を得、次
いで該溶融塩の保有熱を回収することを特徴とする帯鋼
コイルの顕熱回収方法。 3 熱回収手段がボイラー又は熱交換器である特許請求
の範囲第1項または第2項記載の帯鋼コイルの顕熱回収
方法。 4 熱回収手段が溶融塩槽C;配置された伝熱管により
高温の熱媒体を得るようにした特許請求の範囲第1項ま
たは第2項記載の帯鋼コイルの顕熱回収方法。[Scope of Claims] 1. A strip characterized in that a steel strip is immersed in the form of a coil in a molten salt bath, the sensible heat of the steel strip coil is transferred to the molten salt, and the heat retained in the molten salt is recovered. Sensible heat recovery method for steel coils. 2. Sequentially immerse the steel strip in the form of a coil in the higher temperature molten salt section of a plurality of molten salt tanks or a long single molten tank, and then transfer the coil to a lower temperature molten salt section, or A method for recovering sensible heat from a steel strip coil, comprising transferring salt to a higher temperature molten salt side to obtain a higher temperature molten salt, and then recovering the heat retained in the molten salt. 3. A method for recovering sensible heat from a steel strip coil according to claim 1 or 2, wherein the heat recovery means is a boiler or a heat exchanger. 4. The sensible heat recovery method for a steel strip coil according to claim 1 or 2, wherein the heat recovery means is a molten salt tank C; a high temperature heat medium is obtained by the disposed heat transfer tubes.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18924982A JPS5980730A (en) | 1982-10-29 | 1982-10-29 | Method for recovering sensible heat from steel strip coil |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18924982A JPS5980730A (en) | 1982-10-29 | 1982-10-29 | Method for recovering sensible heat from steel strip coil |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5980730A true JPS5980730A (en) | 1984-05-10 |
Family
ID=16238123
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18924982A Pending JPS5980730A (en) | 1982-10-29 | 1982-10-29 | Method for recovering sensible heat from steel strip coil |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5980730A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0288036A2 (en) * | 1987-04-21 | 1988-10-26 | Deutsche Voest-Alpine Industrieanlagenbau Gmbh | Process for cooling a heated material, and device to carry out the process |
CN102950158A (en) * | 2011-08-20 | 2013-03-06 | 鞍钢股份有限公司 | Steel coil edge heating device and heating method thereof |
-
1982
- 1982-10-29 JP JP18924982A patent/JPS5980730A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0288036A2 (en) * | 1987-04-21 | 1988-10-26 | Deutsche Voest-Alpine Industrieanlagenbau Gmbh | Process for cooling a heated material, and device to carry out the process |
EP0288036A3 (en) * | 1987-04-21 | 1989-11-08 | Deutsche Voest-Alpine Industrieanlagenbau Gmbh | Process for cooling a heated material, and device to carry out the process |
CN102950158A (en) * | 2011-08-20 | 2013-03-06 | 鞍钢股份有限公司 | Steel coil edge heating device and heating method thereof |
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