JPS6013035Y2 - heat treatment furnace - Google Patents

Description

【考案の詳細な説明】 本考案は鋼材を圧延工程に供給する為加熱する加熱炉、
或は鋼材等の材料調質を行う、炉等の熱処理炉特に連続
熱処理炉に関する。[Detailed description of the invention] The invention is based on a heating furnace that heats steel materials for supply to the rolling process.
Or it relates to a heat treatment furnace such as a furnace, particularly a continuous heat treatment furnace, for refining materials such as steel materials.

連続熱処理炉のうピ例えば連続加熱炉は連続的に供給さ
れる鋼塊を圧延に適する温度（１１０Ｃｆ’Ｏ〜１２５
０°ｑ程度）まで力０熱する。Continuous heat treatment furnace For example, in a continuous heat treatment furnace, continuously supplied steel ingots are heated at a temperature suitable for rolling (110 Cf'O to 125
Heat to 0°q).

、。従来の連続加熱炉を第１図＆＝於いて概説すると、
加熱炉１はその内部が予熱帯２、加熱帯３、均熱帯４に
分れ、鋼塊５が装入口６より炉内に装入され、予熱帯２
１、加熱帯３、・均熱帯４を経る間に加熱され、所定の
温度となった鋼塊５．は抽出ロアより取出される様にな
っている。,. A conventional continuous heating furnace is outlined in Figure 1 &=.
The interior of the heating furnace 1 is divided into a preheating zone 2, a heating zone 3, and a soaking zone 4. Steel ingots 5 are charged into the furnace through a charging port 6, and the steel ingots 5 are charged into the furnace through a charging port 6.
1. The steel ingot is heated to a predetermined temperature while passing through the heating zone 3, soaking zone 4, and 5. is taken out from the extraction lower.

、 。図中、８はバーナ、９は燃焼ガス出口で
ある。, . In the figure, 8 is a burner and 9 is a combustion gas outlet.

予熱帯２には均熱帯４及び加熱帯３で生皮した燃焼ガス
が流入し、燃焼ガスは輻射伝熱、対流伝熱により直接、
又熱した炉壁からの輻射伝熱により間接に、鋼塊５を熱
する。The combustion gas raw in the soaking zone 4 and the heating zone 3 flows into the preheating zone 2, and the combustion gas is directly heated by radiation heat transfer and convection heat transfer.
Also, the steel ingot 5 is indirectly heated by radiant heat transfer from the heated furnace wall.

この際の燃性ガスの温度は例えば予熱帯入口で８ω℃〜
１０００’Ｃ１出口で５００’Ｃ・〜７００ｃと低く、
更に該ガスの流量も流速でせいぜいｌ ｒｎ／ｓｅｃで
あるので、輻射伝熱量及び対流伝熱量が小さく１．予熱
帯２に於いて燃焼ガスのもつ前二・ネルギ１を十分利用
し得ない。The temperature of the combustible gas at this time is, for example, 8ω℃ at the entrance of the preheating zone.
1000'C1 exit is as low as 500'C ~ 700c,
Furthermore, since the flow rate of the gas is at most lrn/sec, the amount of radiation heat transfer and the amount of convective heat transfer are small. In the pre-heating zone 2, the energy 1 of the combustion gas cannot be fully utilized.

斯かる傾向は在来の炉即ち生産量の高い装置で小量生産
を行う場合、生産量に合わせて省エネルヂ操革する轡合
特！こ顕著である。This tendency is especially useful when performing small-scale production using conventional furnaces, which are high-volume equipment, to improve energy efficiency according to the production volume! This is remarkable.

、更＆均鴨焼ガス９熱壬ネルギを有効利用し得ない原囮
聞して温度成層が生じ伝熱効果を低下させることが挙げ
られる。However, due to the fact that the heat energy of the roasting gas cannot be used effectively, temperature stratification occurs and the heat transfer effect is reduced.

即ち、従来の予熱帯の炉内には、通常炉内の燃焼ガスを
攪拌しく例えば、バーナ、７ア、・イ、等）、ガス温度
の均一化を計る装置が無く、・Ｘ予熱帯での炉内流速は
小さいため炉内高さ・（＝般番；２〜．５九、、）では
１．燃焼ガスの温度の低い部分が下になり１．温度の高
い部分が上方になる、即ち燃焼ガス温度が下から上に向
って高くなる現象（温度成層）を生ずるため、下方のガ
ス層の伝熱量は温度が低いため低減する。In other words, in the conventional preheating zone, there is no device to stir the combustion gas in the furnace (for example, a burner, 7A, ・A, etc.) or to equalize the gas temperature. Since the flow velocity in the furnace is small, the height in the furnace is 1. The lower temperature part of the combustion gas goes down.1. Since the higher temperature portion is on the upper side, that is, the combustion gas temperature increases from the bottom to the top (temperature stratification), the amount of heat transferred in the lower gas layer is reduced due to the lower temperature.

又上方のガス層の温度は高いが、層の厚さが小さくなる
ためガスの輻射率が低くなり、炉内を均一温度化し、ガ
ス層の厚さを炉内高さと同一とした場合に比較し、伝熱
量が小さくなる。Also, although the temperature of the upper gas layer is high, the emissivity of the gas is low because the thickness of the layer is small, compared to when the temperature inside the furnace is made uniform and the thickness of the gas layer is the same as the height inside the furnace. However, the amount of heat transfer becomes smaller.

このことから予熱帯の伝熱効率上昇の対策として、排ガ
スを高温ファンによりその流速を高めノズルを介して鋼
塊に吹付ける噴流予熱帯と称するものがあるが、高温フ
ァンによる設備費増、電力使用量が多くなって実用的で
なく一般に普及するに至っていない。For this reason, as a measure to increase the heat transfer efficiency of the preheating zone, there is a method called a jet preheating zone in which the exhaust gas is increased in flow velocity using a high-temperature fan and is blown onto the steel ingot through a nozzle, but the high-temperature fan increases equipment costs and consumes electricity. Due to the large amount, it is not practical and has not been widely used.

本考案は斯かる状況を鑑み、予熱帯に於ける燃焼ガスの
熱エネルギの有効利用を図ることを目的としてなしたも
のであって、鋼塊等被処理物の搬送列で分割され形成さ
れる予熱帯の上部空間及び下部空間の少なくとも一方の
空間に、炉天井、炉床側に仕切板を又搬送列側に邪魔板
を互に燃焼ガスの流れを遮ぎる様に炉長手方向に交互に
設けたことを特徴とするものである。In view of this situation, the present invention was developed with the aim of effectively utilizing the thermal energy of combustion gas in the preheating zone. In at least one of the upper and lower spaces of the preheating zone, partition plates are installed on the furnace ceiling, on the hearth side, and baffle plates on the conveyor row side, alternately arranged in the longitudinal direction of the furnace so as to mutually block the flow of combustion gas. It is characterized by the fact that it has been provided.

以下図面に基づき本考案の実施例を説明する。Embodiments of the present invention will be described below based on the drawings.

第２図、第３図は第１の実施例を示すもので、互に平行
な炉天井１０、炉床１１によって形成される予熱帯２の
炉内部は鋼塊５の搬送列１２で上部空間１３、下部空間
１４に分割されている。FIGS. 2 and 3 show the first embodiment, and the inside of the furnace of the preheating zone 2 formed by the furnace ceiling 10 and the hearth 11 which are parallel to each other is an upper space with a conveying row 12 of steel ingots 5. 13, and a lower space 14.

前記炉天井１０、炉床１１にはそれぞれ搬送列１２と適
宜な開口１５′を残置せしめる様先端が欠切された仕切
板１６を所要間隔で設ける□。On the furnace ceiling 10 and the hearth 11, partition plates 16 whose tips are cut off are provided at required intervals so as to leave conveying rows 12 and appropriate openings 15', respectively.

又、仕切板１６の下流側（装入口・７側）には、垂直方
向の位置が前記空隙１５と重合し・、搬送列１２とは僅
かな隙間を、炉天井１０と炉床１１とは所要な開口１７
を形成する様垂直平板の邪魔板１８を炉側壁１９．１９
に掛渡して設ける。In addition, on the downstream side (charging port/7 side) of the partition plate 16, the vertical position overlaps with the gap 15, there is a slight gap between the conveyor row 12, and the furnace ceiling 10 and the hearth 11. Required opening 17
A vertical flat baffle plate 18 is attached to the furnace side wall 19.19 to form a
It is set up over the

かくの如く構成した予熱帯２′では、開口１５を通過し
た燃焼ガスは邪魔板１８に、開口１７を通過した燃焼ガ
スぼ仕切板１６にそれぞれ遮ぎられた恰好となり、燃焼
ガスの大部分は矢印Ａの様に迂回し流れる。In the preheating zone 2' configured as above, the combustion gas that has passed through the opening 15 is blocked by the baffle plate 18, and the combustion gas that has passed through the opening 17 is blocked by the partition plate 16, so that most of the combustion gas is It flows in a detour as shown by arrow A.

□斯かる燃焼ガス流に於いて、流路が複雑になるので
、燃焼ガスの混合が良くなり温度成層が妨げられると共
に混合によ□る上下方向の速度成分を生じ燃焼ガスの流
速を増加させる結果どなり゛対流熱伝達率も向上する。□In such a combustion gas flow, the flow path becomes complicated, which improves the mixing of the combustion gas and prevents temperature stratification.□The mixing generates a velocity component in the vertical direction, increasing the flow velocity of the combustion gas. As a result, the convective heat transfer coefficient also improves.

又；・仕切板１６、邪魔板１８の存在により燃焼ガスの
流路長さが長、°＜・なるので、燃焼ガスの滞留時間が
多くなり、やはり伝熱量が増加する。Furthermore, the presence of the partition plate 16 and the baffle plate 18 increases the flow path length of the combustion gas, which increases the residence time of the combustion gas and increases the amount of heat transfer.

更ｉに、仕切板１６ζ邪魔板１８の存在で加熱に寄与す
る輻射面積が大幅に増加する。Furthermore, the presence of the partition plate 16ζ baffle plate 18 greatly increases the radiation area contributing to heating.

第４図、第５図は第２の実施例を示すものであり、第１
の実施例に加えて炉天井１０．炉床１１に炉長手方向に
延びる補強板２０を設け、該補強板２０と仕切板１６、
邪魔板１８とを固着しである。4 and 5 show the second embodiment, and the first embodiment
In addition to the embodiment of furnace ceiling 10. A reinforcing plate 20 extending in the longitudinal direction of the hearth is provided on the hearth 11, and the reinforcing plate 20 and the partition plate 16,
The baffle plate 18 is fixed to the baffle plate 18.

第２の実施例に於いて補強板２０は輻射面積を更に増加
させると共に仕切板１６、邪魔板１８の補強をする。In the second embodiment, the reinforcing plate 20 further increases the radiation area and reinforces the partition plate 16 and the baffle plate 18.

又、第６図は第３の実施例を示す。Further, FIG. 6 shows a third embodiment.

第３の実施例では上部空間１３に設けた仕切板１６と邪
魔板１８、下部空間に設けた仕切板１６と邪魔板１８、
との取付位置を炉長手方向にずらして、上下部空間１３
．１４の仕切板１６と下上部空間１４．１３の邪魔板１
８とを対峙せしめである。In the third embodiment, a partition plate 16 and a baffle plate 18 provided in the upper space 13, a partition plate 16 and a baffle plate 18 provided in the lower space,
By shifting the mounting position of the furnace in the longitudinal direction, the upper and lower spaces 13
．． 14 partition plate 16 and lower upper space 14.13 baffle plate 1
I am forced to confront 8.

該実施例で、燃焼ガスは矢印Ａの様に流れると共に鋼塊
５の隙間等を通過して矢印Ｂ１矢印Ｃの如く炉天井１０
側と炉床１１側とに跨がって流れ、燃焼ガスの混合効果
がより促進される。In this embodiment, the combustion gas flows as shown by arrow A, passes through the gaps between the steel ingots 5, and reaches the furnace ceiling 10 as shown by arrows B1 and C.
The combustion gas flows across the side and the hearth 11 side, further promoting the mixing effect of the combustion gas.

更に第７図は第４の実施例を示し、仕切板１６を山形状
に折り曲げ取付け゛にものセある。Furthermore, FIG. 7 shows a fourth embodiment, in which the partition plate 16 is bent into a mountain shape and attached.

尚、上記した実施例では邪魔板１Ｂを固定式としたが、
該邪魔板１８を手動又は自動により垂直方向に移動可能
とすれば、厚さが異なる鋼塊の加熱に際しても、鋼塊５
と邪魔板１８との隙間を常に一定の最小の値に保てるの
で、該隙間からの燃焼ガスの流れが少なく、大部分のガ
スは邪魔板１８と炉天井１０、炉床１１との間を流れ混
合がよくなる。In addition, in the above-mentioned embodiment, the baffle plate 1B was of a fixed type, but
If the baffle plate 18 can be moved vertically manually or automatically, the steel ingot 5 can be moved even when heating steel ingots with different thicknesses.
Since the gap between the baffle plate 18 and the baffle plate 18 can always be kept at a constant minimum value, the flow of combustion gas from the gap is small, and most of the gas flows between the baffle plate 18, the furnace ceiling 10, and the hearth 11. Mixes better.

更に、ウオーキングビーム式加熱炉即ち鋼塊の搬送を上
昇→移送→下降→戻りの作動をするフレームにより行う
ものにあっては、フレームの動キに追随させて邪魔板を
動かす様にするとフレームの上下動を逃げる為の隙間を
設けなくてよい。Furthermore, in the case of a walking beam heating furnace, that is, one in which steel ingots are conveyed using a frame that moves upwards, then transfers, then descends, then returns, moving the baffle plate to follow the movement of the frame will reduce the movement of the frame. There is no need to provide a gap to escape vertical movement.

又、仕切板１６、邪魔板１８は平板に限らず湾曲したも
のであつでもよくミ傾斜させて設ひてもよい一更に又、
仕切板１６、邪魔板□・１８を上部空間１３、下部空間
１４のいずれか一方のみに設けてもよい等本考案の要旨
を逸脱しない範囲で種々変更を加え得ることはいうまで
もなく、本考案を他の熱処理炉に実施してもよいことは
勿論である。Further, the partition plate 16 and the baffle plate 18 are not limited to flat plates, but may be curved plates or may be installed at an angle.
It goes without saying that various changes can be made without departing from the gist of the present invention, such as the partition plate 16 and the baffle plates □ and 18 may be provided only in either the upper space 13 or the lower space 14. Of course, the invention may be implemented in other heat treatment furnaces.

以上述べた如く本考案によれば、連続熱処理炉の予熱帯
に於ける熱伝達率を向上して燃焼ガスのもつ熱エネルギ
を有効利用し、省エネルギ化を促進し得るものであり、
しかも構造が簡単で製作が容易であり現在の熱処理炉に
も追加変更が可能である。As described above, according to the present invention, it is possible to improve the heat transfer coefficient in the preheating zone of a continuous heat treatment furnace, effectively utilize the thermal energy of combustion gas, and promote energy saving.
Moreover, the structure is simple and easy to manufacture, and additional changes can be made to current heat treatment furnaces.

【図面の簡単な説明】 第１図は従来の連続加熱炉の概略図、第２図は本考案の
第１の実施例を示す説明図、第３図は第２図のＸ矢視図
、第４図は第２の実施例を示す説明図、第５図は第４図
のＹ矢視図、第６図は第３の実施例を示す説明図、第７
図は第４の実施例を示す説明図である。 ２は予熱帯、５は鋼塊、１０は炉天井、１１は炉床、１
２は搬送列、１３は上部空間、１４は下部空間、１６は
仕切板、１８は邪魔板を示す。[Brief Description of the Drawings] Fig. 1 is a schematic diagram of a conventional continuous heating furnace, Fig. 2 is an explanatory diagram showing the first embodiment of the present invention, Fig. 3 is a view taken in the direction of the X arrow in Fig. 2, FIG. 4 is an explanatory diagram showing the second embodiment, FIG. 5 is a view taken along the Y arrow in FIG. 4, FIG. 6 is an explanatory diagram showing the third embodiment, and FIG.
The figure is an explanatory diagram showing the fourth embodiment. 2 is a preheating zone, 5 is a steel ingot, 10 is a furnace ceiling, 11 is a hearth, 1
Reference numeral 2 indicates a conveyance row, 13 indicates an upper space, 14 indicates a lower space, 16 indicates a partition plate, and 18 indicates a baffle plate.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 鋼塊等被処理物の搬送列で分割され形成される予熱帯の
上部空間及び下部空間の少なくとも一方の空間に、炉天
井、炉床側に仕切板を又搬送列側に邪魔板を互に燃焼ガ
スの流れを遮ぎる様に炉長手方向に交互に設けたことを
特徴とする熱処理炉。In at least one of the upper and lower spaces of the preheating zone, which is divided by the conveyance line of steel ingots and other workpieces, a partition plate is installed on the furnace ceiling and the hearth side, and a baffle plate is installed on the conveyance line side. A heat treatment furnace characterized in that the furnaces are arranged alternately in the longitudinal direction so as to block the flow of combustion gas.