JPH0132285B2 - - Google Patents
Info
- Publication number
- JPH0132285B2 JPH0132285B2 JP15294282A JP15294282A JPH0132285B2 JP H0132285 B2 JPH0132285 B2 JP H0132285B2 JP 15294282 A JP15294282 A JP 15294282A JP 15294282 A JP15294282 A JP 15294282A JP H0132285 B2 JPH0132285 B2 JP H0132285B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature material
- partition
- temperature
- low
- storage chamber
- 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
- 239000000463 material Substances 0.000 claims description 60
- 238000005192 partition Methods 0.000 claims description 26
- 238000010438 heat treatment Methods 0.000 claims description 13
- 239000007787 solid Substances 0.000 claims description 9
- 238000011144 upstream manufacturing Methods 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000011343 solid material Substances 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000003779 heat-resistant material Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
Landscapes
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
- Tunnel Furnaces (AREA)
Description
この発明は高温材を冷却して昇温した気体によ
つて低温材の加熱をおこなう材料の冷却加熱装置
に関する。
従来連続式熱処理炉においては、炉体を平面コ
字状に折曲構築して、該炉体の平行な往路側と復
路側との対応部分に互いの炉内雰囲気を循環させ
る連通ダクトを設け、復路側において高温材の冷
却により昇温した雰囲気ガスにより往路側の低温
材の予熱をおこなう方法がある。しかし復路側に
おいて高温材を単にガス流中に位置させるだけで
は、対流熱伝達による伝熱が主であるため熱伝達
率が低く、充分なガスの昇温およびこれに伴う低
温材の予熱ができなかつた。
この発明は上記従来の欠点を解消するもので、
高温材の有する顕熱を効率よく気体に伝熱して低
温材を効率よく加熱することができる材料の冷却
加熱装置を提供しようとするものである。
しかしてこの発明は気体の流路内に配置した高
温材の上流側および下流側の少なくとも一方に通
気性固体を設け、上記気体を上記仕切を通過させ
ることを骨子とする。
この発明において通気性固体とは金属やセラミ
ツク等の耐熱材料から成り、網状、ハニカム状、
せんい状、外孔質状などの通気性を有する形成に
成形された適宜厚さの固体をいう。
発明者はこの通気性固体について種々研究の結
果、気体流路内の高温材の近傍に該流路を横切る
形で通気性固体の仕切を設けると、高温材の顕熱
が効率よく気体に伝熱されることを知見した。こ
の現象を示す実験結果について第１図ａ〜ｄによ
り説明する。
図中、１は炉体、２は580℃に加熱された重量
2000Kgのブロツク状の鋼材、３は通気性固体から
成る仕切で、ステンレス金網（線径0.5mm、20メ
ツシユ）を８枚積層して角板状に成形したもので
ある。第１図ａは仕切３を設けない場合、同図ｂ
は仕切３を鋼材２の上流側に設けた場合、同図ｃ
は同じく下流側に設けた場合、同図ｄは同じく上
流側および下流側に設けた場合を示し、t1＝455
℃に加熱された空気を上流側から流速1.5ｍ／秒
で流通させたところ、流通開始後間もない時点に
おける下流側での空気流温度t2は図示の通りとな
つた。すなわち仕切３を設けない通常の場合に比
べて、仕切３を設けることにより空気流温度t2は
約10〜30℃昇温し、剛材２の顕熱が効率よく空気
に伝熱されることを示している。これらは鋼材２
からの放射熱により仕切３が先ず加熱され、実質
的な表面積および熱伝達係数の大きい通気性固体
から成る仕切３により該仕切を通過する空気が効
率よく加熱されるためである。
次に第２図によりこの発明の一実施例を説明す
る。
図中、５は平面上コ字状に構築した熱処理炉の
炉体で、６は往路側炉体、７は復路側炉体、８は
被熱物搬送用のローラである。９は装入口から装
入された低温材１０が通過する低温材収容室で、
往路側炉体６内に形成され、また１１は図示しな
いラジアントチユーブなどの加熱装置により加熱
された高温材１２が通過する高温材収容室で、復
路側炉体７内に形成されている。１３は低温材収
容室９と高温材収容室１１の上部を連結する低温
側連通路、１４は同じく各収容室の下部を連結す
る高温側連通路、１５は低温材収容室９の天井１
６に設けた吸気口、１７はモータ１８により駆動
されるフアンである。また１９は通気性固体から
成る仕切で、第１図における仕切３と同材料から
成り、高温材１２の下方において雰囲気ガスの循
環流（後述）を横切る高温材収容室１１内に取付
けてある。
上記構成の熱処理炉において低温材１０および
高温材１２を炉内搬送しつつフアン１７を駆動し
て、図中矢印２０で示すように低温材収容室９と
高温材収容室１１との間に雰囲気ガスの循環流を
形成させれば、この循環流により高温材１２は冷
却され、この冷却に伴つて昇温したた雰囲気ガス
は低温材１０を予熱する。このとき高温材１２よ
りの放射熱により加熱され高温となつた仕切１９
によつて、この仕切を通過する雰囲気ガスが主と
して対流熱伝達により加熱され、高温材１２と雰
囲気ガスとの対流熱伝達による奪熱量に加算され
るので、雰囲気ガスは高温となつて低温材収容室
９に流入するのである。
上記の熱処理炉において、仕切１９を図示通り
取付けた場合とこれを取外した場合の実験結果を
第１表に示す。被熱材は鋼材であり、高温材１２
の初期温度は580℃、低温材１０の初期温度は325
℃、ローラ８は停止状態とし、雰囲気ガス循環開
始後の経過時間に対応して被熱材の温度を測定し
たものである。
The present invention relates to a material cooling/heating device that heats a low temperature material using gas that cools a high temperature material and raises its temperature. In conventional continuous heat treatment furnaces, the furnace body is bent into a U-shape in plan, and communication ducts are provided at corresponding parts of the parallel forward and return sides of the furnace body to circulate the atmosphere inside the furnace. Another method is to preheat the low-temperature material on the outward journey using atmospheric gas whose temperature has been raised by cooling the high-temperature material on the return journey. However, simply placing the high-temperature material in the gas flow on the return journey results in a low heat transfer coefficient because heat transfer is mainly through convective heat transfer, and it is not possible to sufficiently raise the temperature of the gas and preheat the low-temperature material accordingly. Nakatsuta. This invention solves the above-mentioned conventional drawbacks,
The object of the present invention is to provide a material cooling/heating device that can efficiently heat a low-temperature material by efficiently transferring the sensible heat of the high-temperature material to a gas. However, the gist of the present invention is to provide a gas permeable solid on at least one of the upstream and downstream sides of the high-temperature material disposed in the gas flow path, and to allow the gas to pass through the partition. In this invention, the breathable solid is made of a heat-resistant material such as metal or ceramic, and has a net shape, a honeycomb shape,
A solid body of an appropriate thickness formed into an air permeable shape such as a fiber or an externally porous shape. As a result of various studies on this breathable solid, the inventor found that if a partition made of breathable solid is provided near the high-temperature material in the gas flow path and across the flow path, the sensible heat of the high-temperature material will be efficiently transferred to the gas. I found out that it gets heated. Experimental results showing this phenomenon will be explained with reference to FIGS. 1a to 1d. In the figure, 1 is the furnace body, 2 is the weight heated to 580℃
2000Kg block-shaped steel material, 3 is a partition made of breathable solid material, which is made by laminating 8 pieces of stainless steel wire mesh (wire diameter 0.5mm, 20 meshes) and forming it into a square plate shape. Fig. 1a shows the case where partition 3 is not provided, and Fig. 1b
When the partition 3 is installed on the upstream side of the steel material 2,
is also provided on the downstream side, and d in the same figure shows the case where it is also provided on the upstream and downstream sides, t 1 = 455
When air heated to .degree. C. was passed from the upstream side at a flow rate of 1.5 m/sec, the airflow temperature t2 on the downstream side shortly after the start of the circulation was as shown in the figure. In other words, compared to the normal case where the partition 3 is not provided, the air flow temperature t 2 increases by approximately 10 to 30°C by providing the partition 3, and the sensible heat of the rigid material 2 is efficiently transferred to the air. It shows. These are steel materials 2
This is because the partition 3 is heated first by the radiant heat from the partition 3, and the air passing through the partition is efficiently heated by the partition 3 made of an air-permeable solid having a substantial surface area and a large heat transfer coefficient. Next, an embodiment of the present invention will be explained with reference to FIG. In the figure, 5 is a furnace body of a heat treatment furnace constructed in a U-shape in plan, 6 is an outgoing furnace body, 7 is a return side furnace body, and 8 is a roller for conveying the object to be heated. 9 is a low temperature material storage chamber through which the low temperature material 10 charged from the charging port passes;
It is formed in the forward furnace body 6, and 11 is a high temperature material storage chamber through which the high temperature material 12 heated by a heating device such as a radiant tube (not shown) passes, and is formed in the return furnace body 7. Reference numeral 13 indicates a low-temperature side communication path connecting the upper portions of the low-temperature material storage chamber 9 and the high-temperature material storage chamber 11, 14 a high-temperature side communication path connecting the lower portions of each storage chamber, and 15 a ceiling 1 of the low-temperature material storage chamber 9.
6 is an intake port provided, and 17 is a fan driven by a motor 18. Further, reference numeral 19 denotes a partition made of a breathable solid material, which is made of the same material as the partition 3 in FIG. In the heat treatment furnace configured as described above, the fan 17 is driven while the low-temperature material 10 and the high-temperature material 12 are transported inside the furnace, and an atmosphere is created between the low-temperature material storage chamber 9 and the high-temperature material storage chamber 11 as shown by the arrow 20 in the figure. If a circulating flow of gas is formed, the high temperature material 12 is cooled by this circulating flow, and the atmospheric gas whose temperature has increased due to this cooling preheats the low temperature material 10. At this time, the partition 19 was heated by the radiant heat from the high temperature material 12 and became high temperature.
As a result, the atmospheric gas passing through this partition is heated mainly by convective heat transfer, and this is added to the amount of heat removed by convective heat transfer between the high-temperature material 12 and the atmospheric gas, so that the atmospheric gas becomes high temperature and the low-temperature material is accommodated. It flows into chamber 9. Table 1 shows the experimental results when the partition 19 was attached as shown in the figure and when it was removed in the above heat treatment furnace. The material to be heated is steel, and the high temperature material 12
The initial temperature of is 580℃, and the initial temperature of low temperature material 10 is 325℃.
℃, the roller 8 was stopped, and the temperature of the heated material was measured corresponding to the elapsed time after the start of atmospheric gas circulation.
【表】
表から明らかなように仕切１９なしの場合に比
べて仕切１９有りの場合は、高温材１２の温度降
下量および低温材１０の温度上昇量は共に大き
い。
上記実施例においては高温材１２の下流側（気
体流下流側）にのみ仕切１９を設けたが、この仕
切は図中鎖線２１で示すように高温材１２の上流
側（気体流上流側）に設けてもよく、さらに上流
側および下流側の両方に設ければさらに大きな効
果が得られることは第１図の実験例からも明らか
である。
以下はこの発明を連続式熱処理炉に適用した場
合について説明したが、この他に各種加熱炉や、
バツチ炉にも本発明は適用できるものである。
以上説明したようにこの発明によれば、気体の
流路内の高温材の上流側および下流側の少なくと
も一方に通気性固体から成る仕切を設け、高温材
の放射熱を吸収した仕切による気体の加熱を付加
するようにしたので、高温材の有する顕熱を効率
よく気体に伝熱して低温材を効率よく加熱するこ
とができる。[Table] As is clear from the table, the amount of temperature drop in the high temperature material 12 and the amount of temperature rise in the low temperature material 10 are both larger in the case with the partition 19 than in the case without the partition 19. In the above embodiment, the partition 19 was provided only on the downstream side of the high temperature material 12 (downstream side of the gas flow), but this partition is provided on the upstream side of the high temperature material 12 (upstream side of the gas flow) as shown by the chain line 21 in the figure. It is also clear from the experimental example shown in FIG. 1 that it may be provided, and that even greater effects can be obtained by providing it on both the upstream and downstream sides. The following describes the case where this invention is applied to a continuous heat treatment furnace, but it can also be applied to various heating furnaces,
The present invention can also be applied to batch furnaces. As explained above, according to the present invention, a partition made of a breathable solid is provided on at least one of the upstream and downstream sides of the high-temperature material in the gas flow path, and the partition absorbs the radiant heat of the high-temperature material. Since heating is applied, the sensible heat of the high-temperature material can be efficiently transferred to the gas, and the low-temperature material can be efficiently heated.
第１図ａ〜ｄはこの発明における通気性固体の
特性実験用装置の縦断面図、第２図はこの発明の
一実施例を示す熱処理炉の縦断面図である。
３……仕切、９……低温材収容室、１０……低
温材、１１……高温材収容室、１２……高温材、
１３……低温側連通路、１４……高温側連通路、
１７……フアン、１９……仕切。
1A to 1D are longitudinal cross-sectional views of an apparatus for testing the properties of air-permeable solids according to the present invention, and FIG. 2 is a longitudinal cross-sectional view of a heat treatment furnace showing an embodiment of the present invention. 3... Partition, 9... Low temperature material storage chamber, 10... Low temperature material, 11... High temperature material storage chamber, 12... High temperature material,
13... Low temperature side communication path, 14... High temperature side communication path,
17... Juan, 19... Partition.
Claims (1)
路と低温側連通路で連結して、上記両連通路を介
して上記両収容室間に気体の強制循環流を形成さ
せ、上記高温材の冷却と同時に上記低温材の加熱
をおこなう材料の冷却加熱装置において、上記高
温材収容室内の上記高温材の上流側および下流側
の少なくとも一方に通気性固体から成る仕切を設
け、上記気体が上記仕切を通過するようにしたこ
とを特徴とする材料の冷却加熱装置。1 The high temperature material storage chamber and the low temperature material storage chamber are connected by a high temperature side communication path and a low temperature side communication path, and a forced circulation flow of gas is formed between the two storage chambers via the communication path, so that the high temperature material storage chamber is In the material cooling/heating device that heats the low-temperature material at the same time as cooling the material, a partition made of a breathable solid is provided on at least one of the upstream and downstream sides of the high-temperature material in the high-temperature material storage chamber, and the gas is A cooling/heating device for materials, characterized in that the material passes through the partition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15294282A JPS5941787A (en) | 1982-09-01 | 1982-09-01 | Method and device for cooling high-temperature material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15294282A JPS5941787A (en) | 1982-09-01 | 1982-09-01 | Method and device for cooling high-temperature material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5941787A JPS5941787A (en) | 1984-03-08 |
| JPH0132285B2 true JPH0132285B2 (en) | 1989-06-30 |
Family
ID=15551518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15294282A Granted JPS5941787A (en) | 1982-09-01 | 1982-09-01 | Method and device for cooling high-temperature material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5941787A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006266615A (en) * | 2005-03-24 | 2006-10-05 | Daido Steel Co Ltd | Heat treatment furnace |
-
1982
- 1982-09-01 JP JP15294282A patent/JPS5941787A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006266615A (en) * | 2005-03-24 | 2006-10-05 | Daido Steel Co Ltd | Heat treatment furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5941787A (en) | 1984-03-08 |
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