JPH01285703A - Radiant tube burner - Google Patents
Radiant tube burnerInfo
- Publication number
- JPH01285703A JPH01285703A JP63115169A JP11516988A JPH01285703A JP H01285703 A JPH01285703 A JP H01285703A JP 63115169 A JP63115169 A JP 63115169A JP 11516988 A JP11516988 A JP 11516988A JP H01285703 A JPH01285703 A JP H01285703A
- Authority
- JP
- Japan
- Prior art keywords
- header
- inner cylinder
- cylinder
- outer cylinder
- metal
- 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
- 239000002184 metal Substances 0.000 claims abstract description 14
- 229910052751 metal Inorganic materials 0.000 claims abstract description 14
- 239000000919 ceramic Substances 0.000 claims abstract description 10
- 239000011819 refractory material Substances 0.000 abstract description 7
- 229910000975 Carbon steel Inorganic materials 0.000 abstract description 5
- 239000010962 carbon steel Substances 0.000 abstract description 5
- 239000010935 stainless steel Substances 0.000 abstract description 5
- 229910001220 stainless steel Inorganic materials 0.000 abstract description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 7
- 239000000446 fuel Substances 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000000567 combustion gas Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 239000001273 butane Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 1
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/04—Constructions of heat-exchange apparatus characterised by the selection of particular materials of ceramic; of concrete; of natural stone
Landscapes
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion Of Fluid Fuel (AREA)
- Gas Burners (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、赤熱した外筒の外周部表面より放射される輻
射熱によって被加熱物を間接加熱するラジアントチュー
ブバーナーに関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a radiant tube burner that indirectly heats an object to be heated using radiant heat emitted from the outer peripheral surface of a red-hot outer cylinder.
（従来の技術）
従来、ラジアントチューブバーナーは、第２図に示すよ
うに、バーナーノズル１、バーナーノズル１を一端部に
内包する内筒２、内筒２を気密に被包する外筒３及びこ
れらを同軸的に１硝するヘッダー４のすべてが耐熱鋼等
の金属製で構成されており、ヘッダー４によって炉壁５
に取り付けられるものである。(Prior Art) Conventionally, a radiant tube burner has a burner nozzle 1, an inner cylinder 2 that includes the burner nozzle 1 at one end, an outer cylinder 3 that airtightly encloses the inner cylinder 2, and a radiant tube burner, as shown in FIG. The header 4 that connects these coaxially is made of metal such as heat-resistant steel, and the header 4 connects the furnace wall 5.
It can be attached to.
このラジアントチューブバーナーにおいては、燃料人口
６から導入され、バーナーノズル１から噴射された燃料
は、ヘッダー４の空気入ロアから内筒２内に導入された
燃焼用空気とバーナーノズル先端部で混合された後、内
筒２内及び内筒２との外筒３との間の空間で燃焼して高
温ガスとなって外筒３の外周部を赤熱しながら、排ガス
となってヘッダー４方向へ流ゑ
れ、ヘッダー４の排ガス出口から炉外へ排出される。In this radiant tube burner, fuel introduced from the fuel port 6 and injected from the burner nozzle 1 is mixed with combustion air introduced into the inner cylinder 2 from the air intake lower of the header 4 at the tip of the burner nozzle. After that, it burns inside the inner cylinder 2 and in the space between the inner cylinder 2 and the outer cylinder 3, becomes high-temperature gas, and while the outer periphery of the outer cylinder 3 becomes red-hot, it becomes exhaust gas and flows toward the header 4. Then, the exhaust gas is discharged from the exhaust gas outlet of the header 4 to the outside of the furnace.
したがって、燃焼ガスが炉内と外筒３によって遮断され
ているため、炉内の被加熱物を燃焼ガス成分に影響され
ることなく加熱することが可能である。又、炉内雰囲気
の調節も、一般工業炉のごとく燃焼ガスにより被加熱物
を直接加熱する通常のバーナーと比して容易に行うこと
ができる。Therefore, since the combustion gas is blocked from the inside of the furnace by the outer cylinder 3, it is possible to heat the object to be heated inside the furnace without being affected by the combustion gas components. Furthermore, the atmosphere inside the furnace can be adjusted more easily than with a normal burner that directly heats the object to be heated using combustion gas, such as in a general industrial furnace.
（発明が解決しようとするｖ１題）
しかしながら、上記従来のラジアントチューブバーナー
は、バーナーノズル１、内筒２、外筒３及びヘッダー４
のすべてが耐熱鋼等の金属製であるため、８００℃以上
の高温では酸化変質して長時間連続使用することができ
なかった。(V1 problem to be solved by the invention) However, the conventional radiant tube burner described above has a burner nozzle 1, an inner cylinder 2, an outer cylinder 3, and a header 4.
Since all of the parts are made of metal such as heat-resistant steel, they deteriorate due to oxidation at high temperatures of 800°C or higher, making it impossible to use them continuously for a long time.
そこで、本発明は、高温で長時間連続使用可能とするラ
ジアントチューブバーナーの提供を目的とする。Therefore, an object of the present invention is to provide a radiant tube burner that can be used continuously at high temperatures for a long period of time.
（課題を解決するための手段）
前記課題を解決するため、本発明は、バーナーノズル、
バーナーノズルを内包する内筒、内筒を被包する外筒及
びこれらを同軸的に支持するヘッダーからなるラジアン
トチューブバーナーにおいて、前記内筒及び外筒をセラ
ミックス製とする一方、ヘッダーを金属製とし、内筒及
び外筒の端部外周とヘッダーとをキャスタブル耐火物を
介在して接合したものである。(Means for Solving the Problems) In order to solve the above problems, the present invention provides a burner nozzle,
In a radiant tube burner consisting of an inner cylinder containing a burner nozzle, an outer cylinder enclosing the inner cylinder, and a header that coaxially supports these, the inner cylinder and outer cylinder are made of ceramics, while the header is made of metal. , the outer circumferences of the end portions of the inner cylinder and outer cylinder and the header are joined with a castable refractory interposed therebetween.
上記手段によれば、セラミックス製の内筒及び外筒を８
００℃以上の高温に長時間さらしても酸化変質すること
がないと共に、上記内筒及び外筒と金属製のへラダーと
の熱膨張差がキャスタブル耐火物によって吸収・緩和さ
れる。According to the above means, the inner cylinder and the outer cylinder made of ceramics are made of 8
Even if exposed to high temperatures of 00°C or higher for a long time, it will not undergo oxidative deterioration, and the difference in thermal expansion between the inner and outer cylinders and the metal ladder will be absorbed and alleviated by the castable refractory.
キャスタブル耐火物としては、熱間線膨張係数がセラミ
ックスと金属との中間のもの（例えばアルミナ（Ａｉｚ
Ｏ，）質）が好ましい。Castable refractories include those whose hot linear expansion coefficient is between that of ceramics and metals (for example, alumina (Aiz)).
O, ) quality) is preferred.
又、内筒及び外筒とヘッダーとの接合部には、内筒及び
外筒の外周に凹部又は凸部を設ける一方、ヘッダーの外
周に上記凹部又は凸部と対向する凸部又は凹部を設ける
ことが好ましい。In addition, at the joint between the inner cylinder and the outer cylinder and the header, a recess or a convex part is provided on the outer periphery of the inner cylinder and the outer cylinder, and a convex part or a recess that faces the above-mentioned recess or convex part is provided on the outer periphery of the header. It is preferable.
（実施例） 以下、本発明の一実施例を第１図と共に説明する。(Example) An embodiment of the present invention will be described below with reference to FIG.
図中１１はプロパンガスあるいはブタンガス等の気体燃
料又は重油あるいは灯油等の液体燃料の燃料人口１２を
有するバーナーノズルで、空気人口１３を有するノズル
用ヘッダー１４に支持されており、共に炭素鋼又はステ
ンレス鋼等の金属からなる。１５は炭化ケイ素（ＳｉＣ
）質等のセラミックスからなる内筒で、炭素鋼又はステ
ンレス鋼等の金属からなり、排ガス出口１６を有する内
筒用ヘッダー１７に、その内周と外端部（図においては
左端部）の外周との間に介在したキャスタブル耐火物１
８により同軸的に接合されている。キャスタブル耐火物
１８としては、熱間線膨張係数がセラミックス製の内筒
１５と金属製の内筒用ヘッダー１７との中間のもの（例
えばアルミナＸ＞が用いられる。又、内筒１５と内筒用
ヘッダー１７との接続部には、両者の相対的な軸方向へ
の移動を防止するため、内筒１５の外端部外周に凹部１
９を設ける一方、この凹部１９と対向する内筒用ヘッダ
ー１７の内周に凸部２０を設けている。そして、内筒用
ヘッダー１７には、前記ノズル用ヘッダー１４がバーナ
ーノズル１１を内筒１５の外端部に内包させて取り付け
られている。In the figure, reference numeral 11 denotes a burner nozzle having a fuel population 12 for gaseous fuel such as propane gas or butane gas, or liquid fuel such as heavy oil or kerosene, and is supported by a nozzle header 14 having an air population 13, both of which are made of carbon steel or stainless steel. Made of metal such as steel. 15 is silicon carbide (SiC
), which is made of metal such as carbon steel or stainless steel, and has a header 17 for the inner cylinder that has an exhaust gas outlet 16; Castable refractory 1 interposed between
8 and coaxially joined. As the castable refractory 18, one whose hot linear expansion coefficient is intermediate between that of the inner cylinder 15 made of ceramics and the header 17 for the inner cylinder made of metal (for example, alumina X) is used. A recess 1 is provided on the outer periphery of the outer end of the inner cylinder 15 at the connection part with the header 17 to prevent relative movement of the two in the axial direction.
9 is provided, and a protrusion 20 is provided on the inner periphery of the inner cylinder header 17 facing the recess 19. The nozzle header 14 is attached to the inner cylinder header 17 so that the burner nozzle 11 is enclosed in the outer end of the inner cylinder 15.
２１は内筒１５と同様に炭化ケイ素質等のセラミックス
からなる外筒で、内端部（図においては右端部）を閉鎖
した有底円筒状をなしており、炭素鋼又はステンレス鋼
等の金属からなり、炉壁２２に取り付けた外筒用ヘッダ
ー２３に、その内周と外端部の外周との間に介在したキ
ャスタブル耐火物２４により同軸的に接合されている。Similar to the inner cylinder 15, 21 is an outer cylinder made of ceramic such as silicon carbide, and has a cylindrical shape with a closed bottom at the inner end (the right end in the figure), and is made of metal such as carbon steel or stainless steel. It is coaxially joined to an outer cylinder header 23 attached to the furnace wall 22 by a castable refractory 24 interposed between its inner periphery and the outer periphery of the outer end.
キャスタブル耐火物２４としては、前記キャスタブル耐
火物１８と同様に熱間線膨張係数が外筒２１と外筒用ヘ
ッダー２３との中間のものが用いられる。又、外筒２１
と外筒用ヘッダー２３との接合部には、両者の相対的な
軸方向の移動を防止するため、外筒２１の外端部外周に
凹部２５を設ける一方、この凹部２５と対向する外筒用
ヘッダー２３の内周に凸部２６を設けている。そして、
外筒用ヘッダー２３には、前記内筒用ヘッダー１７が内
筒ｌ５を外筒２１内に同軸的に被包させて取りイ］けら
れている。As the castable refractory 24, a material whose hot linear expansion coefficient is intermediate between that of the outer cylinder 21 and the outer cylinder header 23 is used, similarly to the castable refractory 18. Also, the outer cylinder 21
At the joint between the outer cylinder header 23 and the outer cylinder header 23, a recess 25 is provided on the outer periphery of the outer end of the outer cylinder 21 in order to prevent relative axial movement between the two. A convex portion 26 is provided on the inner periphery of the header 23 for use. and,
The inner cylinder header 17 is attached to the outer cylinder header 23 so that the inner cylinder l5 is coaxially enclosed within the outer cylinder 21.
上記内筒１５と内筒用ヘッダー１７及び外筒２１と外筒
用ヘッダー２３の接合は、内筒用ヘッダー１７と外筒用
ヘッダー２３をそれぞれ開口部を上向きとして定盤上に
水平に置き、この開口部へ内筒１５及び外筒２１をそれ
ぞれ治具で垂直に固定する。ついで、各ヘッダー１７．
２３と内筒１５及び外筒２１との間隙に水で混練したキ
ャスタブル耐火物を流し込み、硬化させた後に乾燥する
。The inner cylinder 15 and the inner cylinder header 17 and the outer cylinder 21 and the outer cylinder header 23 are joined by placing the inner cylinder header 17 and the outer cylinder header 23 horizontally on a surface plate with their openings facing upward. The inner tube 15 and the outer tube 21 are each fixed vertically to this opening using a jig. Next, each header 17.
Castable refractories kneaded with water are poured into the gaps between 23 and the inner cylinder 15 and outer cylinder 21, hardened, and then dried.
上記構成のラジアントチューブバーナーを還元雰囲気の
熱処理炉へ取り付け、外筒２１の外周部表面を１３５０
℃の温度で赤熱させて約４時間連続運転した後冷却し、
再び上記運転と冷却を６回繰り返した後、ラジアントチ
ューブバーナーを分解して内筒１５と内筒用ヘッダー１
７及び外筒２１と外筒用ヘッダー２３の接合部を点検し
たが異状は認められなかった。続いて組立を行い運転を
続けたがその後異状は認められす、炉内の被加熱物を安
定した還元性雰囲気で、しかも１３５０℃の高温度で長
時間連続処理することかできた。The radiant tube burner with the above configuration was installed in a heat treatment furnace in a reducing atmosphere, and the outer peripheral surface of the outer cylinder 21 was
After being heated to red hot at a temperature of ℃ and operating continuously for about 4 hours, it is cooled.
After repeating the above operation and cooling six times, disassemble the radiant tube burner and remove the inner cylinder 15 and inner cylinder header 1.
7 and the joints between the outer cylinder 21 and the outer cylinder header 23 were inspected, but no abnormality was found. Subsequently, the furnace was assembled and continued operation, but no abnormalities were observed after that, but the objects to be heated in the furnace were able to be continuously processed for a long time at a high temperature of 1350°C in a stable reducing atmosphere.
なお、上記実施例においては、内筒１５及び外筒２１と
各ヘッダー１７．２３との接合部において、内筒１５と
外筒２１の外端部外周に凹部１９，２５を設ける一方、
各ヘッダー１７゜２３の内周に凸部２０．２６を設けた
が、これに限定されるものではなく、内筒１５と外筒２
１の外端部外周に凸部を設ける一方、この凸部と対向す
る各ヘッダー１７．２３の内周に凹部を設けるようにし
てもよい。In addition, in the above embodiment, the recesses 19 and 25 are provided on the outer peripheries of the outer ends of the inner cylinder 15 and the outer cylinder 21 at the joints between the inner cylinder 15 and the outer cylinder 21 and each of the headers 17 and 23.
Although a convex portion 20.26 is provided on the inner circumference of each header 17°23, the present invention is not limited to this, and the inner cylinder 15 and outer cylinder 2
A convex portion may be provided on the outer periphery of the outer end of the header 1, and a concave portion may be provided on the inner periphery of each header 17.23 facing the convex portion.
以上のように本発明によれば、セラミックス製の内筒及
び外筒を８００℃以上の高温に長時間さらしても酸化変
質することがないと共に、上記内筒及び外筒と金属製の
ヘッダーとの熱膨張差がキャスタブル耐火物によって吸
収・緩和されるので、従来のものに比し、８ｏｏ℃以上
の高温で長時間連続使用することができる。As described above, according to the present invention, even if the inner cylinder and outer cylinder made of ceramics are exposed to high temperatures of 800° C. or higher for a long time, they will not undergo oxidation deterioration, and the inner cylinder and outer cylinder and the metal header will not deteriorate in quality. Since the difference in thermal expansion is absorbed and alleviated by the castable refractory, it can be used continuously for a long time at high temperatures of 80° C. or higher compared to conventional refractories.
第１図は本発明の一実施例を示すラジアントチューブバ
ーナーの一部を省略断面した側面図、第２図は従来のラ
ジアントチューブバーナーの概略構成図である。
１１・・・バーナーノズル １４・・・ノズル用ヘッダ
ー１５・・・内筒 １７・・・内筒用ヘッダ
ー１８・・・キャスタブル耐火物
２１・・・外筒 ２２・・・炉壁２３・・・
外筒用ヘッダー
２４・・・キャスタブル耐火物FIG. 1 is a side view with a partially omitted cross section of a radiant tube burner showing an embodiment of the present invention, and FIG. 2 is a schematic configuration diagram of a conventional radiant tube burner. 11... Burner nozzle 14... Nozzle header 15... Inner cylinder 17... Inner cylinder header 18... Castable refractory 21... Outer cylinder 22... Furnace wall 23...
Outer cylinder header 24...castable refractory
Claims (1)
、内筒を被包する外筒及びこれらを同軸的に支持するヘ
ッダーからなるラジアント チューブバーナーにおいて、前記内筒及び外筒をセラミ
ックス製とする一方、ヘッダーを金属製とし、内筒及び
外筒の端部外周とヘッダーとをキャスダブル耐火物を介
在して接合したことを特徴とするラジアントチューブバ
ーナー。(1) In a radiant tube burner consisting of a burner nozzle, an inner cylinder containing the burner nozzle, an outer cylinder enclosing the inner cylinder, and a header that coaxially supports these, the inner cylinder and the outer cylinder are made of ceramics. A radiant tube burner, characterized in that the header is made of metal, and the header is joined to the outer periphery of the end of the inner cylinder and the outer cylinder with a castable refractory interposed therebetween.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63115169A JPH01285703A (en) | 1988-05-12 | 1988-05-12 | Radiant tube burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63115169A JPH01285703A (en) | 1988-05-12 | 1988-05-12 | Radiant tube burner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01285703A true JPH01285703A (en) | 1989-11-16 |
Family
ID=14656052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63115169A Pending JPH01285703A (en) | 1988-05-12 | 1988-05-12 | Radiant tube burner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01285703A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0371232U (en) * | 1989-11-07 | 1991-07-18 | ||
| JPH04115222U (en) * | 1991-03-13 | 1992-10-13 | 株式会社成田製陶所 | Gas burner for mold heating |
| US6321743B1 (en) * | 2000-06-29 | 2001-11-27 | Institute Of Gas Technology | Single-ended self-recuperated radiant tube annulus system |
-
1988
- 1988-05-12 JP JP63115169A patent/JPH01285703A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0371232U (en) * | 1989-11-07 | 1991-07-18 | ||
| JPH04115222U (en) * | 1991-03-13 | 1992-10-13 | 株式会社成田製陶所 | Gas burner for mold heating |
| US6321743B1 (en) * | 2000-06-29 | 2001-11-27 | Institute Of Gas Technology | Single-ended self-recuperated radiant tube annulus system |
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