JPS6038659Y2 - steel heating furnace - Google Patents
steel heating furnaceInfo
- Publication number
- JPS6038659Y2 JPS6038659Y2 JP817382U JP817382U JPS6038659Y2 JP S6038659 Y2 JPS6038659 Y2 JP S6038659Y2 JP 817382 U JP817382 U JP 817382U JP 817382 U JP817382 U JP 817382U JP S6038659 Y2 JPS6038659 Y2 JP S6038659Y2
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- Japan
- Prior art keywords
- furnace
- radiant tube
- combustion
- combustion gas
- semi
- 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
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- Heat Treatments In General, Especially Conveying And Cooling (AREA)
- Control Of Heat Treatment Processes (AREA)
- Tunnel Furnaces (AREA)
Description
【考案の詳細な説明】
本考案はスラブ、ビレット等の鋼材を目的の圧延温度ま
で均一加熱する鋼材加熱炉に関するものである。[Detailed Description of the Invention] The present invention relates to a steel heating furnace that uniformly heats steel materials such as slabs and billets to a target rolling temperature.
従来、この種の加熱炉は被熱材（鋼材）の上下面に直火
バーナを配置した燃焼室を設け、装入側から抽出側に向
って被熱材を搬送しながら加熱を行う直火燃焼方式の加
熱炉が一般に採用されており、燃焼室でのバーナ配置方
法によってサイドバーナ、軸流バーナ、ルーフバーナの
三方式があることが一般的に知られている。Conventionally, this type of heating furnace has a combustion chamber with direct flame burners arranged on the upper and lower surfaces of the material to be heated (steel material), and the material to be heated is heated while being conveyed from the charging side to the extraction side. Combustion type heating furnaces are generally used, and it is generally known that there are three types depending on how the burners are arranged in the combustion chamber: side burners, axial burners, and roof burners.
前者のサイドバーナ方式は炉の両側壁部にバーナを配置
する構造のため、一般に炉長方向は比較的均一な炉温分
布が得られ易いが、炉巾方向については均一な炉温分布
が得られにくいという欠点を有しており、設備的には炉
構造が簡素なため設備コストが安いという特徴を持って
いる。The former side burner method has a structure in which burners are placed on both side walls of the furnace, so it is generally easy to obtain a relatively uniform furnace temperature distribution in the furnace length direction, but it is not possible to obtain a uniform furnace temperature distribution in the furnace width direction. It has the disadvantage of being difficult to burn, and its equipment is characterized by low equipment costs due to its simple furnace structure.
これに対して、中老の軸流バーナ方式は炉の長手方向に
バーナを配置する構造のためサイドバーナ方式の場合と
は逆に、一般に炉巾方向は比較的均一な炉温分布が得ら
れ易いが、炉長方向については均一な炉温分布が得られ
にくいという欠点を有しており、設備的にもバーナの配
置上炉巾方向にノーズ部を設ける必要があるため炉床利
用率が低く、かつ設備コストが高く、作業性及び保守性
が悪いという欠点を持っている。On the other hand, the axial flow burner method used by Chuo has a structure in which the burners are arranged in the longitudinal direction of the furnace, so contrary to the case of the side burner method, a relatively uniform furnace temperature distribution is generally obtained in the width direction of the furnace. However, it has the disadvantage that it is difficult to obtain a uniform furnace temperature distribution in the furnace length direction, and in terms of equipment, it is necessary to provide a nose section in the furnace width direction due to the burner arrangement, which reduces the hearth utilization rate. It has the disadvantages of low cost, high equipment cost, and poor workability and maintainability.
一方、後者のルーフバーナ方式はその性格上、上部燃焼
室の天井炉壁にバーナを配置する構造のため、炉巾及び
炉長方向の全面にわたって比較的均一な炉温分布が得ら
れるという特徴を有しているが、他の三方式に比べてバ
ーナ本数が多くなるため一般に設備費が高く、かつバー
ナ配置の性格上、上部燃焼室のみしか適用できないとい
う欠点を有していた。On the other hand, the latter roof burner method has a structure in which the burner is placed on the ceiling furnace wall of the upper combustion chamber, so it has the characteristic that a relatively uniform furnace temperature distribution can be obtained over the entire furnace width and furnace length direction. However, since the number of burners is larger than the other three methods, the equipment cost is generally high, and due to the nature of the burner arrangement, it has the disadvantage that it can only be applied to the upper combustion chamber.
又、この種の直火燃焼方式を燃焼機能面からみた場合、
バーナから供給された燃料と燃焼用空気を直接炉内（燃
焼室内）の自由空間で混合燃焼させ、その燃焼ガスの輝
炎放射、ガス放射及び炉壁放射を利用して被熱材の加熱
を行うものであるが、一般にこの種の直火燃焼方式では
バーナから供給される流体の噴出エネルギーを十分に大
きく取っても、その火炎長は精々３〜４ｍＬかならず、
加えて低負荷燃焼時にはバーナ供給流体の噴出エネルギ
ーも小さくなるため火炎の直進性が低下し、浮力による
火炎の舞上り現象や炉内ガス流れによる火炎の曲折現象
を発生するという基本的な問題を有していたため、最近
の加熱炉のごとく炉の大型化（炉巾で１０〜１５ｍ、、
炉長で３０〜５０ｍ）や操業の多様化（９５０〜１２５
０℃迄の広温度範囲で均一加熱）に対しては、従来の直
火燃焼方式では十分に対処することができなかった。Also, when looking at this type of direct flame combustion method from the combustion function perspective,
The fuel and combustion air supplied from the burner are mixed and burned directly in the free space inside the furnace (combustion chamber), and the material to be heated is heated using the bright flame radiation, gas radiation, and furnace wall radiation of the combustion gas. However, in general, in this type of direct combustion method, even if the ejection energy of the fluid supplied from the burner is sufficiently large, the flame length is only 3 to 4 mL at most.
In addition, during low-load combustion, the ejection energy of the burner supply fluid also decreases, which reduces the straightness of the flame, resulting in the fundamental problem of flame soaring due to buoyancy and flame bending due to gas flow in the furnace. Because of this, the furnace has become larger (10 to 15 m in width, as in recent heating furnaces).
Furnace length: 30-50m) and diversification of operations (950-125m)
Conventional direct-fire combustion methods have not been able to adequately cope with the problem of uniform heating over a wide temperature range down to 0°C.
又、最近は炉の大型化に伴ない被熱材の搬送手段として
一般にウオーキングビーム方式を採用する傾向にあるが
、このウオーキングビーム方式では被熱材を断熱、水冷
構造の固定及び可動スキッドで支持、搬送する方式のた
めこのスキッド直上にある被熱材はスキッドパイプのシ
ャドウ効果により伝熱が阻害されるため、被熱材の他の
部分に比べて加熱がされにくいという欠点を有しており
、被熱材の均一加熱のためには加熱初期の段階でこのス
キッドシャドウ部を積極的に加熱する、いわゆるピーク
温度を有した炉温分布を形成することが望ましいが、従
来の直火燃焼方式の加熱炉では任意点、即ちスキッド部
にピーク炉温を作ることは一般的に下可能であった。In addition, recently, as furnaces have become larger, there has been a general tendency to adopt a walking beam method as a means of transporting heated materials, but in this walking beam method, heated materials are supported by a fixed and movable skid with an insulated and water-cooled structure. Because of the conveyance method, heat transfer to the heated material directly above the skid is inhibited by the shadow effect of the skid pipe, so it has the disadvantage that it is difficult to heat compared to other parts of the heated material. In order to uniformly heat the material to be heated, it is desirable to actively heat this skid shadow area in the early stages of heating, creating a furnace temperature distribution with a so-called peak temperature. In heating furnaces, it was generally possible to create a peak furnace temperature at any point, that is, at the skid area.
本考案は、従来の直火燃焼式加熱炉の問題点である被熱
材の均−加熱性の改善に主眼を置き、被熱材の偏熱防止
による加熱Ｔ／Ｈのアップと品質の向上を設備コストの
安いサイドバーナ方式で図るため、両端を開放した円筒
状放射管を炉内に複数個配し該円筒状放射管の炉壁側管
端に燃焼装置を配すと共に、該円筒状放射管の炉内側管
端に近接して横断面を下方に向けた半円筒状放射管を配
設し、該半円筒状放射管の下方に半円筒状放射管と直交
状に燃焼ガス分散壁を所定間隔で複数個配設し、燃焼ガ
ス分散壁と半円筒状放射管の横断面とで燃焼ガス通過溝
を設けてなることを特徴とする鋼材加熱炉である。This invention focuses on improving the uniform heating of the heated material, which is a problem with conventional direct-fired combustion heating furnaces, and increases heating T/H and quality by preventing uneven heat of the heated material. In order to achieve this using a side burner method with low equipment costs, a plurality of cylindrical radiant tubes with both ends open are arranged in the furnace, and a combustion device is arranged at the end of the cylindrical radiant tube on the furnace wall side. A semi-cylindrical radiant tube with a cross section facing downward is disposed close to the inner tube end of the radiant tube, and a combustion gas dispersion wall is provided below the semi-cylindrical radiant tube and perpendicular to the semi-cylindrical radiant tube. A steel heating furnace is characterized in that a plurality of radial tubes are arranged at predetermined intervals, and combustion gas passage grooves are provided in the combustion gas distribution wall and the cross section of the semi-cylindrical radiant tube.
以下、第１図から第８図に従って本考案の一実施例を説
明する。An embodiment of the present invention will be described below with reference to FIGS. 1 to 8.
図において１は耐火断熱性と機密性を有した炉壁、２は
炉壁１の天井部の炉長方向と炉巾方向に複数個配置され
たルーフバーナ、３は炉壁１の炉長方向の下部両側壁に
配置されたサイドバーナであり、４は加熱炉を各燃焼室
に仕切るための仕切壁、５は被熱材、即ち鋼材、６は予
熱帯、７は加熱帯、８は均熱帯である。In the figure, 1 is a furnace wall with fireproof insulation and airtightness, 2 is a plurality of roof burners arranged in the furnace length direction and furnace width direction on the ceiling of the furnace wall 1, and 3 is a furnace wall on the furnace wall 1 in the furnace length direction. Side burners are placed on both lower side walls, 4 is a partition wall for partitioning the heating furnace into each combustion chamber, 5 is a material to be heated, that is, steel, 6 is a preheating zone, 7 is a heating zone, and 8 is a soaking zone. It is.
９は被熱材５を支持するための固定スキッド、１０は被
熱材５を搬送するための可動スキッドであり水冷スキッ
ドパイプの外面は断熱構造となっている。9 is a fixed skid for supporting the heated material 5; 10 is a movable skid for conveying the heated material 5; the outer surface of the water-cooled skid pipe has a heat insulating structure.
１１はサイドバーナ３の炉内側先端部に間隙を設けて配
置された所要長さの耐熱性と熱伝導性を有した円筒状放
射管、１２は円筒状放射管１１の支柱壁、１３は円筒状
放射管１１の炉内側先端部に連接して設けられた横断面
を下方に向けた所要長さの耐熱性と熱伝導を有した半円
筒状放射管、１４は半円筒状放射管１３を炉内に支持、
固定すると同時にサイドバーナ３から放出された燃焼ガ
スを炉内へ分散供給するための耐熱性を有した燃焼ガス
分散壁で、通常半円筒状放射管１３の下部に直交状に所
定間隔をおいて複数段設けられている。Reference numeral 11 denotes a cylindrical radiant tube having a required length of heat resistance and thermal conductivity, which is disposed with a gap at the tip inside the furnace of the side burner 3, 12 is a support wall of the cylindrical radiator tube 11, and 13 is a cylinder. A semi-cylindrical radiant tube 14 having heat resistance and heat conduction and having a required length with a cross section facing downward, which is connected to the front end of the inside of the furnace of the radial tube 11, is a semi-cylindrical radiant tube 13. Supported in the furnace,
A heat-resistant combustion gas dispersion wall for dispersing and supplying combustion gas emitted from the side burner 3 into the furnace at the same time as fixing the wall, and is usually placed at a predetermined interval orthogonally at the bottom of the semi-cylindrical radiant tube 13. There are multiple stages.
１５は燃焼ガス分散壁１４の半円筒状放射管１３側の上
端面に半円筒状放射管１３と相対する形で設けられた燃
焼ガス通過溝であり、通常加熱目的に応じて開口面積が
決定される。15 is a combustion gas passage groove provided on the upper end surface of the combustion gas distribution wall 14 on the side of the semicylindrical radiant tube 13 so as to face the semicylindrical radiant tube 13, and the opening area is usually determined depending on the purpose of heating. be done.
又、図中の破線による矢印はルーフバーナ２からの燃焼
ガス流れを、実線による矢印はサイドバーナ３から炉内
へ分散供給される燃焼ガス流れを示したものである。Further, the broken line arrows in the figure indicate the flow of combustion gas from the roof burner 2, and the solid line arrows indicate the flow of combustion gas distributed and supplied from the side burner 3 into the furnace.
次に本考案の作動機能について説明する。Next, the operating function of the present invention will be explained.
加熱炉内に装入された被熱材５は、被熱材５の支持、搬
送装置である固定スキッド９及び可動スキッド１０によ
って装入側の予熱帯６から抽出側の均熱帯８に向って搬
送される間に被熱材５の上面はルーフバーナ２より、被
熱材５の下面はサイドバーナ３により加熱が行われる。The material to be heated 5 charged into the heating furnace is moved from the preheating zone 6 on the charging side to the soaking zone 8 on the extraction side by a fixed skid 9 and a movable skid 10, which are supporting and conveying devices for the material to be heated 5. While being transported, the upper surface of the heat target material 5 is heated by the roof burner 2, and the lower surface of the heat target material 5 is heated by the side burner 3.
この場合、加熱炉の下部はサイドバーナ３の先端に円筒
状放射管１１を配置する構造のため、サイドバーナ３か
ら供給された燃料と燃焼用空気は円筒状放射管１１内で
混合、燃焼が行われるため従来の直火燃焼方式に比べて
浮力や炉内ガス流れの影響を受けることがないため、燃
焼量の多少に関係なく炉内の目的位置まで燃焼ガスを搬
送することが可能である。In this case, the lower part of the heating furnace has a structure in which the cylindrical radiant tube 11 is placed at the tip of the side burner 3, so the fuel and combustion air supplied from the side burner 3 are mixed and combusted within the cylindrical radiant tube 11. Because this method is carried out, it is not affected by buoyancy or gas flow in the furnace compared to conventional direct-fire combustion methods, so it is possible to transport the combustion gas to the target location in the furnace regardless of the amount of combustion. .
更に、この燃焼ガスは円筒状放射管１１の炉内側管端を
連接して設けられた半円筒状放射管１３内を通一つで炉
の中央部付近まで流動するようになっているが、半円筒
状放射管１３の所要位置に適当数の燃焼ガス分散壁１４
が設けられており、この燃焼ガス分散壁１４には所要の
開口面積を有した燃焼ガス通過溝１５が設けられている
ため、半円筒状放射管１３下部の燃焼ガス噴流の一部は
この燃焼ガス分散壁１４に衝突し炉内へ分散供給が行わ
れる。Furthermore, this combustion gas flows through a semi-cylindrical radiant tube 13 provided by connecting the inner tube ends of the cylindrical radiant tubes 11 to near the center of the furnace. A suitable number of combustion gas dispersion walls 14 are provided at required positions of the semi-cylindrical radiation tube 13.
Since this combustion gas distribution wall 14 is provided with a combustion gas passage groove 15 having a required opening area, a part of the combustion gas jet at the bottom of the semi-cylindrical radiant tube 13 is absorbed by this combustion gas. The gas collides with the gas distribution wall 14 and is distributed and supplied into the furnace.
従って、円筒状放射管１１の長さと燃焼ガス通過溝１５
の開口面積及び燃焼ガス分散壁１４の位置及び数を適当
に組合せることにより、加熱目的にあった炉温分布を形
成することが可能である。Therefore, the length of the cylindrical radiation tube 11 and the combustion gas passage groove 15 are
By appropriately combining the opening area of the combustion gas distribution wall 14 and the position and number of the combustion gas distribution walls 14, it is possible to form a furnace temperature distribution suitable for the heating purpose.
この結果、被熱材５の加熱が行われにくい固定スキッド
９及び可動スキッド１０のいわゆるスキッドシャドウ部
を積極的に加熱することが可能となり、９５０〜１２５
０°Ｃという広温度範囲にわたって被熱材５の均一加熱
が安定して行えるという特徴を有している。As a result, it becomes possible to actively heat the so-called skid shadow portions of the fixed skid 9 and the movable skid 10, where heating of the heated material 5 is difficult, and
It has the characteristic that uniform heating of the heated material 5 can be performed stably over a wide temperature range of 0°C.
次に本考案の効果を燃焼実験炉（高１．８×巾３．０×
長６．４７７Ｌ）で確認した結果を例示する。Next, we will demonstrate the effect of this invention in a combustion experimental furnace (height 1.8 x width 3.0 x
6.477L) is exemplified.
実験は本考案の効果を確認するため炉巾方向に１．７ｍ
のピッチで燃焼量１５０万Ｋｃａｌ／ｈのバーナを２本
取付け、被熱材５による奪熱を横絞するため天井炉壁に
は水冷奪熱管を配し、燃料としてはコークス炉ガス、燃
焼用空気としては３００℃の熱風を用い空気比１．１の
共通条件のもとで、従来の直火燃焼方式と本考案の燃焼
方式の比較を行った結果を第６図から第８図に示す。The experiment was carried out at 1.7 m in the width direction of the furnace in order to confirm the effectiveness of this invention.
Two burners with a combustion rate of 1.5 million Kcal/h are installed at a pitch of Figures 6 to 8 show the results of a comparison between the conventional direct flame combustion method and the combustion method of the present invention, using hot air at 300°C as the air and under the common condition of an air ratio of 1.1. .
第６図は従来の直火燃焼方式の一例として、実炉での炉
巾方向の温度分布特性が最も優れているとの評価が高い
ガス二流方サイドバーナの炉温分布の測定例である。FIG. 6 shows an example of measuring the furnace temperature distribution of a gas two-flow side burner, which is highly rated as having the best temperature distribution characteristics in the furnace width direction in an actual furnace, as an example of a conventional direct-fire combustion method.
又、第７図は円筒状放射管１１を単独で使用した場合の
炉温分布の測定例であり、バーナとしてはノズルミック
スバーナを使用し円筒状放射管１１としては５００φの
ＳｉＣチューブを４．８肌の長さで使用した結果である
。Moreover, FIG. 7 shows an example of measuring the furnace temperature distribution when the cylindrical radiant tube 11 is used alone. A nozzle mix burner is used as the burner, and a 500φ SiC tube is used as the cylindrical radiant tube 11. This is the result of using the product at a length of 8 skins.
第８図は円筒状放射管１１の炉内側管端に連接して半円
筒状放射管１３と燃焼ガス分散壁１４を組合せた本考案
の炉温分布の測定例であり、バーナとしては第７図と同
じものを使用し、円筒状放射管１１は直径が４００φて
長さが１．６ｍのＳｉＣチューブをバーナから２００７
７＋７７１の間隙を設けて配置し、半円筒状放射管１３
としては直径４００φの半割ＳｉＣチューブを１．６ｍ
の長さで配置し半円筒状放射管１３の燃焼ガス分散壁１
４の燃焼ガス通過溝１５の開口面積比率（４００φの断
面積に対する比率）をバーナ側から１１０．７０．７０
％と漸減した場合の結果である。FIG. 8 shows an example of measuring the furnace temperature distribution of the present invention in which a semi-cylindrical radiant tube 13 and a combustion gas distribution wall 14 are connected to the furnace inner tube end of the cylindrical radiant tube 11, and a seventh burner is used as the burner. Using the same one as shown in the figure, the cylindrical radiation tube 11 is a SiC tube with a diameter of 400φ and a length of 1.6 m.
The semi-cylindrical radiation tube 13 is arranged with a gap of 7+771.
For example, 1.6 m of half-split SiC tube with a diameter of 400φ
The combustion gas distribution wall 1 of the semi-cylindrical radiant tube 13 is arranged with a length of
The opening area ratio (ratio to the cross-sectional area of 400φ) of the combustion gas passage groove 15 in No. 4 is 110.70.70 from the burner side.
This is the result when it gradually decreases to %.
第６図から第８図は横軸にバーナから距離を、縦軸には
炉温をバーナ長方向の各断面での測定温度（’Ｉ’）
ＳＥＣとバーナ長方向の平均温度（Ｔ）ＡＶＥとの差で
示したものであり、燃焼量２０〜１００％の範囲で実験
した結果を図中の斜線範囲で表示したものである。In Figures 6 to 8, the horizontal axis shows the distance from the burner, and the vertical axis shows the furnace temperature, and the temperature measured at each cross section in the longitudinal direction of the burner ('I').
It is shown by the difference between SEC and the average temperature (T)AVE in the burner length direction, and the results of experiments in the range of combustion amount of 20 to 100% are shown in the shaded range in the figure.
この結果、従来の直火燃焼方式ではバーナから約１．５
７７１の所に火炎のピーク温度があり、それより先では
急速に炉温の低下が見られる、いわゆるバーナ測高の温
度傾向を示すため炉巾が広い大型炉では炉中央部の炉温
か低くなり被熱材５の偏熱が大きくなることを示してい
る。As a result, in the conventional direct combustion method, approximately 1.5
There is a peak flame temperature at 771, and a rapid drop in furnace temperature can be seen beyond that point, which is a so-called burner height measurement temperature trend.In large furnaces with a wide furnace width, the furnace temperature in the center of the furnace is lower. This indicates that the uneven heat of the heated material 5 increases.
これに対して円筒状放射管による燃焼方式では燃焼量に
ほとんど関係なく、バーナ長方向に対して略均−な炉温
分布が得られるということを示している。On the other hand, the combustion method using a cylindrical radiant tube shows that a substantially uniform furnace temperature distribution in the burner length direction can be obtained, almost regardless of the combustion amount.
又、円筒状放射管の先端に半円筒状放射管と燃焼ガス分
散壁を組合せて配置した本考案では燃焼ガス分散壁の位
置と燃焼ガス通過溝の開口面積を適当に選択することに
より、炉内の所定位置にピーク点を持った炉温分布を形
成することができることを示している。In addition, in the present invention, in which a semi-cylindrical radiant tube and a combustion gas dispersion wall are arranged at the tip of a cylindrical radiant tube, the furnace can be This shows that it is possible to form a furnace temperature distribution with a peak point at a predetermined position within the range.
以上述べたように本考案の鋼材加熱炉は従来の直火燃焼
力加熱炉の問題点であったバーナ長方向の炉温分布の改
善を図るため直火燃焼バーナの先端に円筒状放射管を配
し、この円筒状放射管の先端に半円筒状放射管と燃焼ガ
ス分散壁を配置することにより、炉内の所要位置に所要
のピーク点を有した炉温分布を形成することができるた
め、加熱炉で被熱材の偏熱原因となるスキッドシャドウ
部を積極的に加熱することが可能であり、被熱材の均一
加熱、即ち偏熱防止により加熱Ｔ／Ｈのアッフト品質の
向上が設備コストの安いサイドバーナ方式で可能という
特徴を有した鋼材加熱炉である。As mentioned above, the steel heating furnace of the present invention has a cylindrical radiant tube at the tip of the direct-fired combustion burner in order to improve the furnace temperature distribution in the burner length direction, which was a problem with conventional direct-fired combustion power heating furnaces. By arranging a semi-cylindrical radiant tube and a combustion gas distribution wall at the tip of this cylindrical radiant tube, it is possible to form a furnace temperature distribution with a desired peak point at a desired position within the furnace. It is possible to actively heat the skid shadow part that causes uneven heat of the heated material in the heating furnace, and improves the after quality of heating T/H by uniformly heating the heated material, that is, preventing uneven heat. This is a steel heating furnace that can be heated using a side burner method with low equipment costs.
図面において第１図は本考案の鋼材加熱炉の縦断面図、
第２図は第１図のＩ−Ｉ線における側断面図、第３図は
第２図の■−■線からみた炉下部における一部分の平面
図、第４図は放射管と支柱壁の拡大断面図、第５図は本
考案において用いる半円筒状放射管と燃焼ガス通過溝を
設けた燃焼ガス分散壁の拡大図、第６図は従来の直火燃
焼方式における炉内温度分布の測定例の図、第７図は円
筒状放射管燃焼方式における炉内温度分布の測定例の図
、第８図は円筒状放射管及び半円筒状放射管と燃焼ガス
分散壁を組合せた本考案の炉温分布の測定例を示す図で
ある。
１は炉壁、２はルーフバーナ、３はサイドバーナ、４は
仕切壁、５は被熱材（鋼材）、６は予熱帯、７は加熱帯
、８は均熱帯、９は固定スキッド、１０は可動スキッド
、１１は円筒状放射管、１２は支柱壁、１３は半円筒状
放射管、１４は燃焼ガス分散壁、１５は燃焼ガス通過溝
。In the drawings, FIG. 1 is a longitudinal cross-sectional view of the steel heating furnace of the present invention;
Figure 2 is a side sectional view taken along line I-I in Figure 1, Figure 3 is a plan view of a portion of the lower part of the reactor seen from line ■-■ in Figure 2, and Figure 4 is an enlarged view of the radiation tube and support wall. A cross-sectional view, Figure 5 is an enlarged view of the semi-cylindrical radiation tube used in the present invention and a combustion gas distribution wall provided with combustion gas passage grooves, and Figure 6 is an example of measuring the temperature distribution inside the furnace in a conventional direct-fire combustion system. Figure 7 shows an example of measuring the temperature distribution inside the furnace in the cylindrical radiant tube combustion method, and Figure 8 shows the furnace of the present invention which combines a cylindrical radiant tube, a semi-cylindrical radiant tube, and a combustion gas distribution wall. It is a figure which shows the measurement example of temperature distribution. 1 is a furnace wall, 2 is a roof burner, 3 is a side burner, 4 is a partition wall, 5 is a heated material (steel material), 6 is a preheating zone, 7 is a heating zone, 8 is a soaking zone, 9 is a fixed skid, 10 is a A movable skid, 11 a cylindrical radial tube, 12 a support wall, 13 a semi-cylindrical radiant tube, 14 a combustion gas distribution wall, and 15 a combustion gas passage groove.
Claims (1)
筒状放射管の炉壁側管端に燃焼装置を配すと共に、該円
筒状放射管の炉内側管端に近接して、横断面を下方に向
けた半円筒状放射管を配設し、該半円筒状放射管の下方
に半円筒状放射管と直交状に燃焼ガス分散壁を所定間隔
で複数個配設し、燃焼ガス分散壁と半円筒状放射管の横
断面とで燃焼ガス通過溝を設けてなる、鋼材加熱炉A plurality of cylindrical radiant tubes with both ends open are disposed in the furnace, and a combustion device is disposed at the furnace wall side tube end of the cylindrical radiant tube, and a combustion device is disposed close to the furnace wall side tube end of the cylindrical radiant tube. , disposing a semi-cylindrical radiant tube with a cross section facing downward, and disposing a plurality of combustion gas dispersion walls at predetermined intervals below the semi-cylindrical radiant tube perpendicularly to the semi-cylindrical radiant tube; A steel heating furnace in which a combustion gas passage groove is formed by a combustion gas distribution wall and a cross section of a semi-cylindrical radiant tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP817382U JPS6038659Y2 (en) | 1982-01-26 | 1982-01-26 | steel heating furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP817382U JPS6038659Y2 (en) | 1982-01-26 | 1982-01-26 | steel heating furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58113759U JPS58113759U (en) | 1983-08-03 |
| JPS6038659Y2 true JPS6038659Y2 (en) | 1985-11-19 |
Family
ID=30020884
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP817382U Expired JPS6038659Y2 (en) | 1982-01-26 | 1982-01-26 | steel heating furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6038659Y2 (en) |
-
1982
- 1982-01-26 JP JP817382U patent/JPS6038659Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58113759U (en) | 1983-08-03 |
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