JPH02178506A - Radiant tube - Google Patents

Radiant tube

Info

Publication number
JPH02178506A
JPH02178506A JP33353388A JP33353388A JPH02178506A JP H02178506 A JPH02178506 A JP H02178506A JP 33353388 A JP33353388 A JP 33353388A JP 33353388 A JP33353388 A JP 33353388A JP H02178506 A JPH02178506 A JP H02178506A
Authority
JP
Japan
Prior art keywords
flame stabilizer
spark rod
inner tube
flame
burner
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.)
Granted
Application number
JP33353388A
Other languages
Japanese (ja)
Other versions
JP2683398B2 (en
Inventor
Kazunori Meguro
目黒 和教
Tatsuo Nozawa
野沢 辰雄
Takashi Tanaka
隆 田中
Yukifumi Sakai
幸文 酒井
Yasuzane Sasaki
佐々木 泰実
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Coorstek KK
Original Assignee
Toshiba Ceramics Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Ceramics Co Ltd filed Critical Toshiba Ceramics Co Ltd
Priority to JP33353388A priority Critical patent/JP2683398B2/en
Publication of JPH02178506A publication Critical patent/JPH02178506A/en
Application granted granted Critical
Publication of JP2683398B2 publication Critical patent/JP2683398B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Gas Burners (AREA)

Abstract

PURPOSE:To maintain normal combustion for a long term by forming a flame stabilizer and a spark rod constituting a burner of Si impregnation SiC. CONSTITUTION:An outlet 2 arranged out of a furnace wall is connected to an end of an outer tube 1 of SiC nature and an inner tube 3 of SiC nature is inserted from an end side thereof in the outer tube 1. A flame stabilizer 4 is inserted from an end side thereof in the inner tube 3 and a spark rod 5 in the flame stabilizer 4. The flame stabilizer 4 and the spark rod 5 are formed of Si impregnation SiC, and a burner is composed of the members of the flame stabilizer 4, the spark rod 5, a burner support part 8 and the like. Air is allowed to flow between the flame stabilizer 4 and the inner tube 3 from an air supply inlet 10 to supply from a flow inlet 4a provided in the flame stabilizer 4 to the edge part of the spark rod 5 of the inside of the flame stabilizer 4. At this time, when high voltage is impressed between the spark rod 5 and the flame stabilizer 4, electric spark is produced at the edge of the spark rod 5 to ignite fuel gas so as to produce a flame in the inside of the inner tube 3.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明はラジアントチューブに関する。[Detailed description of the invention] [Industrial application field] The present invention relates to radiant tubes.

〔従来の技術〕[Conventional technology]

シングルエンド型のラジアントチューブは、例えばウオ
ーキングビーム方式の加熱炉で使用されている。このラ
ジアントチューブは、バーナーと、該バーナーを包囲す
る内管と、該内管を包囲する外管とを有している。前記
バーナーは、保炎器とその内部に挿入されたスパークロ
ッドを存している。このラジアントチューブでは、バー
ナーを構成する保炎器とスパークロッドとの間に電圧を
印加し、電気火花を発生させることによりLPG。
Single-ended radiant tubes are used, for example, in walking beam heating furnaces. This radiant tube has a burner, an inner tube surrounding the burner, and an outer tube surrounding the inner tube. The burner includes a flame stabilizer and a spark rod inserted inside the flame stabilizer. This radiant tube generates LPG by applying voltage between the flame holder and spark rod that make up the burner to generate electric sparks.

LNGなどの燃料ガスに青火して炎を発生させ、燃焼ガ
スを内管の開放端から内管と外管との間の間隙を;t!
i遇させ、外管から炉内へ熱を輻射することにより加熱
を行っている。
Fuel gas such as LNG is ignited to generate a flame, and the combustion gas is passed from the open end of the inner tube to the gap between the inner tube and the outer tube; t!
Heating is performed by radiating heat from the outer tube into the furnace.

従来、前記バーナーを構成する保炎器及びスパークロッ
ドは、スチール製のものが使用されていた。
Conventionally, the flame holder and spark rod constituting the burner have been made of steel.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

しかし、スチール製の保炎器及びスパークロッドを使用
すると、これらが炎に直接触れて酸化され短期間で先端
部が消耗するため、正常な燃焼を維持することができな
くなるという問題があった。
However, when steel flame stabilizers and spark rods are used, there is a problem in that normal combustion cannot be maintained because the steel flame holders and spark rods come into direct contact with flames and are oxidized, causing the tips to wear out in a short period of time.

本発明は前記問題点を解決するためになされたものであ
り、長期間にわたって正常な燃焼を維持することができ
るラジアントチューブを提供することを目的とする。
The present invention was made to solve the above problems, and an object of the present invention is to provide a radiant tube that can maintain normal combustion for a long period of time.

〔課題を解決するための手段と作用〕[Means and actions to solve the problem]

本発明のラジアントチューブは、バーナーと、該バーナ
ーを包囲する内管と、該内管を包囲する外管とを具備し
たラジアントチューブにおいて、前記バーナーを構成す
る保炎器及びスパークロッドをSi含浸SiCで形成し
たことを特徴とするものである。
The radiant tube of the present invention includes a burner, an inner tube surrounding the burner, and an outer tube surrounding the inner tube, in which a flame holder and a spark rod constituting the burner are made of Si-impregnated SiC. It is characterized by being formed by.

本発明において、内管及び外管を構成する材質としては
、5icSsi、N4などが挙げられる。
In the present invention, examples of the material constituting the inner tube and the outer tube include 5icSsi and N4.

このうちでもSi含浸S i CS焼結SfCなどのS
iC質材料が好ましい。これは、SiC質材料は酸化物
、窒化物などの他の材料に比べて熱伝導率が高く、かつ
耐酸化性に優れており、他の材料に比べて酸化の度合が
少ないためである。
Among these, Si impregnated Si, CS sintered SfC, etc.
iC-based materials are preferred. This is because the SiC material has higher thermal conductivity than other materials such as oxides and nitrides, has excellent oxidation resistance, and has a lower degree of oxidation than other materials.

本発明において、保炎器及びスパークロッドの材質とし
てSi含浸SiCを用いるのは、Si含浸SiCが電気
火花を発生させ得るだけの導電性を有し、かつ酸化され
にくいためである。ただし、Si含浸SiCでも酸化さ
れるため、表面を滑らかにするなどの対策を講じて、極
力その酸化を抑制することが望ましい。
In the present invention, Si-impregnated SiC is used as the material for the flame stabilizer and the spark rod because Si-impregnated SiC has sufficient conductivity to generate electric sparks and is resistant to oxidation. However, since Si-impregnated SiC is also oxidized, it is desirable to take measures such as smoothing the surface to suppress the oxidation as much as possible.

本発明のラジアントチューブによれば、バーナーを構成
する保炎器及びスパークロッドをSi含浸SiCで形成
しているので、長期間にわたって保炎器及びスパークロ
ッドの消耗を抑制し、正常な燃焼を維持することができ
る。
According to the radiant tube of the present invention, since the flame holder and spark rod constituting the burner are made of Si-impregnated SiC, wear and tear of the flame holder and spark rod is suppressed over a long period of time, and normal combustion is maintained. can do.

〔実施例〕〔Example〕

以下、本発明の実施例を第1図を参照して説明する。な
お、第1図は本発明に係るラジアントチューブの断面図
である。
Embodiments of the present invention will be described below with reference to FIG. Note that FIG. 1 is a sectional view of the radiant tube according to the present invention.

第1図において、SiC質の外管1の一端には炉壁の外
に配置される排気口2が接続されている。
In FIG. 1, an exhaust port 2 disposed outside the furnace wall is connected to one end of an outer tube 1 made of SiC.

外管1内にはその一端側からSiC質の内管3が挿入さ
れている。内管3内にはその一端側がら保炎器4が挿入
され、保炎器4内にはスパークロッド5が挿入されてい
る。これら保炎器4及びスパークロッド5はSi含fi
sicて形成されている。
An inner tube 3 made of SiC is inserted into the outer tube 1 from one end thereof. A flame holder 4 is inserted into the inner tube 3 from one end thereof, and a spark rod 5 is inserted into the flame holder 4. These flame stabilizers 4 and spark rods 5 contain Si.
sic is formed.

スパークロッド5の先端部にはアルミナ碍子6を介して
旋回チップ7が取付けられている。保炎器4及びスパー
クロッド5はバーナー支持部8に支持されており、バー
ナー支持部8には燃料ガス1」(給口9及び空気供給口
10が設けられている。これら保炎器4、スパークロッ
ド5、バーナー支持部8などの部材によりバーナーが構
成されている。
A rotating tip 7 is attached to the tip of the spark rod 5 via an alumina insulator 6. The flame holder 4 and the spark rod 5 are supported by a burner support part 8, and the burner support part 8 is provided with a fuel gas 1" (a fuel gas supply port 9 and an air supply port 10. These flame holders 4, A burner is constituted by members such as a spark rod 5 and a burner support portion 8.

以上の各部材からなるラジアントチューブは加熱炉の対
向する炉壁間に水平に設置される。
The radiant tube made of each of the above members is installed horizontally between opposing furnace walls of the heating furnace.

前記構成のラジアントチューブによる加熱は以下のよう
にして行われる。燃料ガスは燃料ガス供給口9から保炎
器4内部を流れ、旋回チップ7を通過して旋回流として
スパークロッド5の先端部へ供給される。空気は空気供
給口IOから保炎器4と内管3との間を流れ、保炎器4
に設けられた流入口4aから保炎器4内部のスパークロ
ッド5の先端部へ供給される。この時点でスパークロッ
ド5と保炎器4との間に高電圧を印加すると、スパーク
ロッド5先端で電気火花が発生し、燃料ガスに着火して
内管3内部で炎が発生する。高温の燃焼ガスは内管3内
部、内管3の開放端、内管3と外管1との間隙を通過し
て、排気口2から排気される。燃焼ガスの熱は外管1か
ら加熱炉内へ輻射され、加熱炉の雰囲気ガスが加熱され
る。
Heating by the radiant tube having the above configuration is performed as follows. The fuel gas flows through the flame stabilizer 4 from the fuel gas supply port 9, passes through the swirling tip 7, and is supplied to the tip of the spark rod 5 as a swirling flow. Air flows between the flame holder 4 and the inner tube 3 from the air supply port IO, and the air flows between the flame holder 4 and the inner tube 3.
It is supplied to the tip of the spark rod 5 inside the flame stabilizer 4 from the inlet 4a provided in the flame stabilizer 4. When a high voltage is applied between the spark rod 5 and the flame holder 4 at this point, an electric spark is generated at the tip of the spark rod 5, ignites the fuel gas, and a flame is generated inside the inner tube 3. The high-temperature combustion gas passes through the interior of the inner tube 3, the open end of the inner tube 3, and the gap between the inner tube 3 and the outer tube 1, and is exhausted from the exhaust port 2. The heat of the combustion gas is radiated from the outer tube 1 into the heating furnace, thereby heating the atmospheric gas of the heating furnace.

なお、内管3は第2図に示すように、貫通孔3aを設け
た構造のものでもよい。
Note that the inner tube 3 may have a structure in which a through hole 3a is provided, as shown in FIG.

〔発明の効果〕〔Effect of the invention〕

以上詳述したように本発明のラジアントチューブによれ
ば、バーナーを構成する保炎器及びスパークロッドをS
i含浸SiCで形成しているので、長Ji771ifJ
にわたって保炎器及びスパークロッドの消耗を抑制し、
正常な燃焼を維持することができる。
As detailed above, according to the radiant tube of the present invention, the flame holder and spark rod constituting the burner can be
Since it is made of i-impregnated SiC, it is long.
Reduces wear and tear on flame holders and spark rods over time,
Can maintain normal combustion.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の実施例におけるラジアントチューブの
長平方向に沿う断面図、第2図は本発明の他の実施例に
おけるラジアントチューブの長平方向に沿う断面図であ
る。 1・・・外管、2・・・排気口、3・・・内管、4・・
・保炎器、5・・・スパークロッド、6・・・アルミナ
碍子、7・・・旋回チップ、8・・・バーナー支持部、
9・・・燃料ガス供給口、10・・・空気供給口。 出願人代理人 弁理士 鈴江武彦
FIG. 1 is a sectional view along the longitudinal direction of a radiant tube in an embodiment of the present invention, and FIG. 2 is a sectional view along the longitudinal direction of a radiant tube in another embodiment of the invention. 1...Outer pipe, 2...Exhaust port, 3...Inner pipe, 4...
・Flame stabilizer, 5... Spark rod, 6... Alumina insulator, 7... Swivel tip, 8... Burner support part,
9...Fuel gas supply port, 10...Air supply port. Applicant's agent Patent attorney Takehiko Suzue

Claims (1)

【特許請求の範囲】[Claims] バーナーと、該バーナーを包囲する内管と、該内管を包
囲する外管とを具備したラジアントチューブにおいて、
前記バーナーを構成する保炎器及びスパークロッドをS
i含浸SiCで形成したことを特徴とするラジアントチ
ューブ。
A radiant tube including a burner, an inner tube surrounding the burner, and an outer tube surrounding the inner tube,
The flame holder and spark rod that constitute the burner are S
A radiant tube characterized in that it is formed of i-impregnated SiC.
JP33353388A 1988-12-28 1988-12-28 Radiant tube Expired - Fee Related JP2683398B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP33353388A JP2683398B2 (en) 1988-12-28 1988-12-28 Radiant tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP33353388A JP2683398B2 (en) 1988-12-28 1988-12-28 Radiant tube

Publications (2)

Publication Number Publication Date
JPH02178506A true JPH02178506A (en) 1990-07-11
JP2683398B2 JP2683398B2 (en) 1997-11-26

Family

ID=18267109

Family Applications (1)

Application Number Title Priority Date Filing Date
JP33353388A Expired - Fee Related JP2683398B2 (en) 1988-12-28 1988-12-28 Radiant tube

Country Status (1)

Country Link
JP (1) JP2683398B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04106305A (en) * 1990-08-24 1992-04-08 Yokoi Kikai Kosakusho:Kk Radiant tube burner

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04106305A (en) * 1990-08-24 1992-04-08 Yokoi Kikai Kosakusho:Kk Radiant tube burner

Also Published As

Publication number Publication date
JP2683398B2 (en) 1997-11-26

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