JP2008209112A - Radiation heating device - Google Patents

Radiation heating device Download PDF

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JP2008209112A
JP2008209112A JP2008096686A JP2008096686A JP2008209112A JP 2008209112 A JP2008209112 A JP 2008209112A JP 2008096686 A JP2008096686 A JP 2008096686A JP 2008096686 A JP2008096686 A JP 2008096686A JP 2008209112 A JP2008209112 A JP 2008209112A
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radiant heating
combustion chamber
heating device
oxygen
flame burner
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JP4775398B2 (en
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Kuniaki Okada
邦明 岡田
Hitoshi Oishi
均 大石
Yutaka Suzukawa
豊 鈴川
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JFE Steel Corp
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JFE Steel Corp
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/34Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

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  • Gas Burners (AREA)
  • Pre-Mixing And Non-Premixing Gas Burner (AREA)
  • Air Supply (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Tunnel Furnaces (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a radiation heating device capable of uniformly and stably heating a heating object in a furnace by heat radiation. <P>SOLUTION: A tubular flame burner 2, and a radiation heating box 3 for surrounding the tubular flame burner 2 and radiating toward a furnace 1 are mounted on a furnace wall 1a of the furnace 1. The tubular flame burner 2 includes a tubular combustion chamber 10. A tip end 10a of the tubular combustion chamber 10 is opened toward the radiation heating box 3, and a nozzle for blowing fuel gas and a nozzle for blowing oxygen-containing gas into the combustion chamber 10 are mounted near a rear end 10b of the combustion chamber 10. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、雰囲気熱処理炉等の間接加熱炉に用いられる、金属等の表面から熱エネルギーを放出して加熱を行う放射加熱装置に関するものである。   The present invention relates to a radiant heating apparatus that is used in an indirect heating furnace such as an atmospheric heat treatment furnace and performs heating by releasing thermal energy from the surface of metal or the like.

鋼帯の光輝焼鈍等に代表される、被加熱物の表面を酸化させない加熱として、特許文献1に記載されているラジアントボックスを用いた放射加熱装置による方式が知られている。   As heating that does not oxidize the surface of an object to be heated, such as bright annealing of a steel strip, a method using a radiant heating device using a radiant box described in Patent Document 1 is known.

この方式は、炉内を不活性ガス又は還元ガス雰囲気に保持し、バーナの燃焼による熱エネルギーをラジアントボックスの内面で吸収し、吸収した熱エネルギーをラジアントボックスの外面から炉内に放射することによって被加熱物を加熱するものである。
特開平7−218142号公報
This method maintains the inside of the furnace in an inert gas or reducing gas atmosphere, absorbs the heat energy from the burner combustion on the inner surface of the radiant box, and radiates the absorbed heat energy from the outer surface of the radiant box into the furnace. The object to be heated is heated.
JP 7-218142 A

しかし、特許文献1に記載の放射加熱装置においては、以下のような問題がある。   However, the radiation heating device described in Patent Document 1 has the following problems.

すなわち、使用しているバーナの火炎は、バーナの軸心方向に直進し、半径方向に広がらないため、ラジアントボックスはバーナの軸心方向に延びた形状となり、ラジアントボックスの側面を鋼帯等の被加熱物の表面に対向させて放射加熱を行っている。そのため、ラジアントボックス内に生じるバーナ軸心方向の温度分布の影響で、鋼帯等の被加熱物を均一に加熱できない可能性があるという問題がある。   In other words, the flame of the burner used goes straight in the axial direction of the burner and does not spread in the radial direction, so the radiant box has a shape extending in the axial direction of the burner, and the side surface of the radiant box is made of steel strip or the like. Radiant heating is performed facing the surface of the object to be heated. Therefore, there is a problem that the object to be heated such as a steel strip may not be heated uniformly due to the influence of the temperature distribution in the direction of the burner axis that occurs in the radiant box.

仮に、ラジアントボックスのバーナ軸心方向の長さを短くして、ラジアントボックスの前面で放射加熱させようとしても、ラジアントボックスのバーナ軸心前方の部分が過加熱され、ラジアントボックスが短期間で変形・破損するという問題がある。   Even if the length of the radiant box in the burner axis direction is shortened and radiant heating is attempted on the front surface of the radiant box, the portion of the radiant box in front of the burner axis is overheated and the radiant box is deformed in a short period of time.・ There is a problem of damage.

本発明は、上記の問題を解決するためになされたものであり、炉内の被加熱物を熱放射によって加熱するための放射加熱装置であって、被加熱物を均一に安定して加熱することのできる放射加熱装置を提供することを目的とするものである。   The present invention has been made to solve the above problems, and is a radiant heating device for heating an object to be heated in a furnace by thermal radiation, and uniformly and stably heats the object to be heated. An object of the present invention is to provide a radiant heating device that can be used.

上記の課題を解決するために、本発明は以下の特徴を有する。
[1]炉内の被加熱物を放射熱によって加熱するための放射加熱装置であって、先端が開放された管状の燃焼室と、ノズル噴射口が前記燃焼室の内面に開口し、燃料と酸素含有ガスを別々にあるいは予混合して吹き込むノズルを備え、各ノズルの噴射方向が燃焼室内周面の接線方向とほぼ一致している管状火炎バーナと、該管状火炎バーナからの火炎を取り囲み、炉内に向けて熱エネルギーを放射するための放射加熱箱とを備えていることを特徴とする放射加熱装置。
[2]前記放射加熱箱は、管状火炎バーナの燃焼室の軸心と直交する方向の長さが管状火炎バーナの燃焼室の軸心方向の長さに比べて長い形状であることを特徴とする前記[1]に記載の放射加熱装置。
[3]前記放射加熱箱の前面が被加熱物と対向するように設けられていることを特徴とする前記[1]又は[2]に記載の放射加熱装置。
[4]前記管状火炎バーナに吹き込む酸素含有ガスと前記放射加熱箱から排出される燃焼排ガスとの間で熱交換させるための熱交換器を有していることを特徴とする前記[1]〜[3]のいずれかに記載の放射加熱装置。
[5]前記熱交換器が回転式蓄熱体であることを特徴とする前記[4]に記載の放射加熱装置。
In order to solve the above problems, the present invention has the following features.
[1] A radiant heating device for heating an object to be heated in a furnace by radiant heat, a tubular combustion chamber having an open tip, a nozzle injection port opening on an inner surface of the combustion chamber, Comprising a nozzle that blows oxygen-containing gas separately or premixed, and in which the injection direction of each nozzle substantially coincides with the tangential direction of the peripheral surface of the combustion chamber, and surrounds the flame from the tubular flame burner; A radiant heating device comprising a radiant heating box for radiating thermal energy toward a furnace.
[2] The radiant heating box is characterized in that the length in the direction perpendicular to the axial center of the combustion chamber of the tubular flame burner is longer than the axial length of the combustion chamber of the tubular flame burner. The radiant heating device according to [1].
[3] The radiant heating device according to [1] or [2], wherein a front surface of the radiant heating box is provided so as to face an object to be heated.
[4] The heat exchanger according to the above [1], which has a heat exchanger for exchanging heat between the oxygen-containing gas blown into the tubular flame burner and the combustion exhaust gas discharged from the radiation heating box. [3] The radiant heating device according to any one of [3].
[5] The radiant heating device according to [4], wherein the heat exchanger is a rotary heat storage body.

本発明においては、管状の火炎を形成する管状火炎バーナを用いた放射加熱箱によって放射加熱を行うので、放射加熱箱内に軸対称の温度分布が得られ、被加熱物を均一に安定して面状に加熱することができる。   In the present invention, since radiant heating is performed by a radiant heating box using a tubular flame burner that forms a tubular flame, an axially symmetric temperature distribution is obtained in the radiant heating box, and the object to be heated is uniformly stabilized. It can be heated in a planar shape.

本発明の一実施形態を図1〜図3に示す。図1は、この実施形態に係る放射加熱装置の側面図、図2は、図1におけるA−A矢視の断面図である。図3は、この実施形態に係る放射加熱装置の全体構成図である。   One embodiment of the present invention is shown in FIGS. FIG. 1 is a side view of a radiant heating device according to this embodiment, and FIG. 2 is a cross-sectional view taken along line AA in FIG. FIG. 3 is an overall configuration diagram of the radiant heating device according to this embodiment.

図1において、炉1の炉壁1aに管状火炎バーナ2が取り付けられており、管状火炎バーナ2の火炎を取り囲み、炉1内に向かって放射を行うための放射加熱箱3が炉1内側の炉壁1aに取り付けられている。   In FIG. 1, a tubular flame burner 2 is attached to a furnace wall 1 a of a furnace 1, and a radiant heating box 3 surrounding the flame of the tubular flame burner 2 and radiating toward the inside of the furnace 1 is disposed inside the furnace 1. It is attached to the furnace wall 1a.

管状火炎バーナ2は、特開平11−281015号公報に記載されたものと基本的に同じ構造であり管状の燃焼室10を有しており、燃焼室10の先端10aが放射加熱箱3に向けて開放されている。そして、燃焼室10の後端10bの近傍に、燃焼室10へ燃料ガスを吹き込むノズルと酸素含有ガスを吹き込むノズルが取り付けられている。   The tubular flame burner 2 has basically the same structure as that described in Japanese Patent Laid-Open No. 11-281015, and has a tubular combustion chamber 10, and the tip 10 a of the combustion chamber 10 faces the radiant heating box 3. Open. A nozzle that blows fuel gas into the combustion chamber 10 and a nozzle that blows oxygen-containing gas are attached in the vicinity of the rear end 10 b of the combustion chamber 10.

図1及び図2に示すように、燃焼室10へのノズル噴射口として管軸方向に沿った細長いスリット12が燃焼室10の同一管周上の4個所に形成されており、それぞれのスリット12に管軸方向に細長い偏平形状のノズル11a、11b、11c、11dが接続されている。それぞれのノズル11a、11b、11c、11dの噴射方向は、燃焼室10の内周面の接線方向でかつ同一回転方向になるように設けられている。それら4個のノズルの内、ノズル11aとノズル11cの2個は燃料ガス吹き込みノズルであり、ノズル11bとノズル11dの2個は酸素含有ガス吹き込みノズルである。   As shown in FIGS. 1 and 2, elongated slits 12 along the tube axis direction are formed at four locations on the same pipe circumference of the combustion chamber 10 as nozzle injection ports to the combustion chamber 10. The nozzles 11a, 11b, 11c, and 11d, which are elongated in the tube axis direction, are connected. The injection directions of the nozzles 11 a, 11 b, 11 c, and 11 d are provided so as to be tangential to the inner peripheral surface of the combustion chamber 10 and in the same rotational direction. Of these four nozzles, two nozzles 11a and 11c are fuel gas blowing nozzles, and two nozzles 11b and 11d are oxygen-containing gas blowing nozzles.

燃料ガス吹き込みノズル11a、11cからは燃料ガスが燃焼室10の内周面の接線方向に向かって高速で吹き込まれ、酸素含有ガス吹き込みノズル11b、11dからは酸素含有ガスが燃焼室10の内周面の接線方向に向かって高速で吹き込まれ、燃焼室10の内周面に近い領域で燃料ガスと酸素含有ガスが効率良く混合されながら旋回流が形成されるようになっている。   Fuel gas is blown from the fuel gas blowing nozzles 11 a and 11 c at a high speed toward the tangential direction of the inner circumferential surface of the combustion chamber 10, and oxygen-containing gas is blown from the oxygen-containing gas blowing nozzles 11 b and 11 d to the inner circumference of the combustion chamber 10. A swirling flow is formed while the fuel gas and the oxygen-containing gas are efficiently mixed in a region close to the inner peripheral surface of the combustion chamber 10 while being blown at high speed toward the tangential direction of the surface.

その旋回流となった混合ガスに点火プラグ又はパイロットバーナ等の点火装置(図示せず)によって点火すると、燃焼室10内に管状の火炎が生成される。その管状の火炎となった燃焼ガスは燃焼室10の先端10aから放射加熱箱3内に放出される。   When the mixed gas in the swirl flow is ignited by an ignition device (not shown) such as an ignition plug or a pilot burner, a tubular flame is generated in the combustion chamber 10. The combustion gas that has become the tubular flame is discharged into the radiant heating box 3 from the tip 10 a of the combustion chamber 10.

放射加熱箱3は、金属製又は耐熱性のあるセラミックス製で、図1に示すように、燃焼室10の軸心と直交する方向の長さLtが、管状火炎バーナ2の燃焼室10の軸心方向の長さLsに比べて長い偏平した形状であり、燃焼室10の軸心と直交する断面は、正方形あるいは円形等の軸対称の形状になっている。   The radiant heating box 3 is made of metal or heat-resistant ceramic, and the length Lt in the direction orthogonal to the axis of the combustion chamber 10 is the axis of the combustion chamber 10 of the tubular flame burner 2 as shown in FIG. The cross-section perpendicular to the axial center of the combustion chamber 10 has an axisymmetric shape such as a square or a circle.

そして、放射加熱箱3は、その前面3aが炉1内を搬送されている鋼帯等の被加熱物30に対向するように配置されており、管状火炎バーナ2の燃焼室10の先端10aから放出される火炎を取り囲んでその熱エネルギーを吸収し、前面3aから熱エネルギーを放出して、対向する被加熱物30を放射加熱するようになっている。   And the radiation heating box 3 is arrange | positioned so that the front surface 3a may oppose to the to-be-heated objects 30, such as a steel strip currently conveyed in the furnace 1, From the front-end | tip 10a of the combustion chamber 10 of the tubular flame burner 2 It surrounds the flame to be released, absorbs its thermal energy, releases thermal energy from the front surface 3a, and radiates and heats the object 30 to be heated.

また、放射加熱箱3から排出口3bを経由して炉外に排出される燃焼排ガスと、管状火炎バーナ2に供給される酸素含有ガスとを熱交換させるための回転式蓄熱体25が炉外に設けられている。   Further, a rotary heat accumulator 25 for exchanging heat between the exhaust gas discharged from the radiant heating box 3 via the discharge port 3b and the oxygen-containing gas supplied to the tubular flame burner 2 is provided outside the furnace. Is provided.

そして、図3に全体構成図を示すように、この実施形態においては、燃料ガスを供給する配管中には、燃料ガス吹き込みノズル11a、11cに供給する燃料ガスの供給流量を調整するための燃料ガス流量調整弁17が設けられており、酸素含有ガスを供給する配管中には、酸素含有ガス吹き込みノズル11b、11dに供給する酸素含有ガスの供給流量を調整するための酸素含有ガス流量調整弁18が設けられている。燃料ガス流量調整弁17と酸素含有ガス流量調整弁18は供給流量制御装置(図示せず)によって制御されるようになっている。   And in this embodiment, as shown in FIG. 3, the fuel for adjusting the supply flow rate of the fuel gas supplied to the fuel gas blowing nozzles 11a and 11c is provided in the pipe for supplying the fuel gas. A gas flow rate adjustment valve 17 is provided, and an oxygen-containing gas flow rate adjustment valve for adjusting the supply flow rate of the oxygen-containing gas supplied to the oxygen-containing gas blowing nozzles 11b and 11d in the pipe for supplying the oxygen-containing gas. 18 is provided. The fuel gas flow rate adjustment valve 17 and the oxygen-containing gas flow rate adjustment valve 18 are controlled by a supply flow rate control device (not shown).

なお、燃料ガス及び酸素含有ガスの供給流量は、燃料ガスの流量計21と酸素含有ガスの流量計22によって測定されており、その測定値は供給流量制御装置に送られ、燃料ガス流量調整弁17及び酸素含有ガス流量調整弁18の開度調整に利用されるようになっている。   The supply flow rates of the fuel gas and the oxygen-containing gas are measured by the fuel gas flow meter 21 and the oxygen-containing gas flow meter 22, and the measured values are sent to the supply flow control device, and the fuel gas flow control valve 17 and the opening adjustment of the oxygen-containing gas flow rate adjusting valve 18 are used.

さらに、酸素含有ガスを供給する配管の途中に回転式蓄熱体25が設けられており、酸素含有ガスは吹き込みノズルに供給される前に、予め回転式蓄熱体25に通される。一方、放射加熱箱3からの燃焼排ガスを排出する配管も回転式蓄熱体25を経由するようになっており、燃焼排ガスも回転式蓄熱体25を通過するようになっている。これによって、回転式蓄熱体25を介して、酸素含有ガスと燃焼排ガスとの間で連続的に熱交換が行われ、高温の酸素含有ガスが管状火炎バーナの燃焼室10内に供給される。   Furthermore, the rotary heat storage body 25 is provided in the middle of the piping for supplying the oxygen-containing gas, and the oxygen-containing gas is passed through the rotary heat storage body 25 in advance before being supplied to the blowing nozzle. On the other hand, the piping for discharging the combustion exhaust gas from the radiant heating box 3 also passes through the rotary heat storage body 25, and the combustion exhaust gas also passes through the rotary heat storage body 25. Thus, heat exchange is continuously performed between the oxygen-containing gas and the combustion exhaust gas via the rotary heat storage body 25, and a high-temperature oxygen-containing gas is supplied into the combustion chamber 10 of the tubular flame burner.

なお、上記の酸素含有ガスは、空気、酸素、酸素富化空気、酸素・排ガス混合ガスなど燃焼用の酸素を供給するガスを指している。   The oxygen-containing gas mentioned above refers to a gas that supplies oxygen for combustion, such as air, oxygen, oxygen-enriched air, oxygen / exhaust gas mixture gas.

上記のように構成された放射加熱装置においては、管状火炎バーナ2によって強い旋回力を得た燃焼ガスが、放射加熱箱3の内部で、管状火炎バーナ2の半径方向に広がりながら燃焼するため、放射加熱箱3内部で軸対称の温度分布が得られる。したがって、放射加熱箱3の前面3aから放出される熱放射線も軸対称となり、それによって加熱される被加熱物30は均一に面状に加熱される。   In the radiant heating device configured as described above, the combustion gas that has obtained a strong swirl force by the tubular flame burner 2 burns while spreading in the radial direction of the tubular flame burner 2 inside the radiant heating box 3, An axially symmetric temperature distribution is obtained inside the radiant heating box 3. Therefore, the thermal radiation emitted from the front surface 3a of the radiant heating box 3 is also axisymmetric, and the object 30 to be heated is heated uniformly in a planar shape.

その際に、火炎が半径方向に伸ばされながら燃焼するので、長手方向の長さLsを短くしても、放射加熱箱3の前面3aが部分的に過加熱されて変形することがなく、放射加熱箱3を、幅方向の長さLtが長手方向の長さLsより長い偏平した形状とすることによって、被加熱物30に熱エネルギーを放出する前面3aの面積が大きくなり、火炎からの熱エネルギーを効率的に放射加熱に用いることができる。   At that time, since the flame burns while being stretched in the radial direction, the front surface 3a of the radiant heating box 3 is not partially overheated and deformed even if the length Ls in the longitudinal direction is shortened. By making the heating box 3 a flat shape in which the length Lt in the width direction is longer than the length Ls in the longitudinal direction, the area of the front surface 3a that releases heat energy to the object to be heated 30 is increased, and the heat from the flame is increased. Energy can be efficiently used for radiant heating.

また、放射加熱箱3からの燃焼排ガスと管状火炎バーナに供給する酸素含有ガスにとの間で熱交換させることにより、燃焼排ガスの排熱を有効に活用できる。また、酸素含有ガスが高温化して燃焼反応性が上がるので、酸素比又は空気比を容易に1.0前後の値にすることができ、NOxなどの有害物質、未燃焼ガス、煤煙といった環境汚染源を低減することができる。   In addition, by exchanging heat between the combustion exhaust gas from the radiant heating box 3 and the oxygen-containing gas supplied to the tubular flame burner, the exhaust heat of the combustion exhaust gas can be effectively utilized. In addition, since the oxygen-containing gas is heated to increase the combustion reactivity, the oxygen ratio or air ratio can be easily set to a value around 1.0, and environmental pollution sources such as NOx and other harmful substances, unburned gas, and soot Can be reduced.

また、上記の熱交換に用いる熱交換器として回転式蓄熱体を用いることにより、連続的な熱交換を行い、定常燃焼を継続できるので、一定周期で切り替える際に非定常燃焼となる切替式熱交換器を用いた場合に比べて一層効果的である。さらに、切替式熱交換器を用いた場合のように、切り替えの際の放射加熱箱内の圧力変動によって放射加熱箱が繰り返し応力を受けて寿命が短くなるということもない。   In addition, by using a rotary heat accumulator as a heat exchanger used for the above heat exchange, continuous heat exchange can be performed and steady combustion can be continued, so switching heat that becomes unsteady combustion when switching at a constant cycle This is more effective than using an exchanger. Further, unlike the case where a switching heat exchanger is used, the lifetime of the radiant heating box is not repeatedly shortened due to repeated stress due to pressure fluctuations in the radiant heating box during switching.

このように、この実施形態に係る放射加熱装置においては、鋼帯等の被加熱物を均一に安定して効率的に加熱することができる。   Thus, in the radiant heating device according to this embodiment, an object to be heated such as a steel strip can be heated uniformly and stably.

なお、この実施形態では、燃料ガス吹き込みノズル及び酸素含有ガス吹き込みノズルを、噴射方向が燃焼室内周面の接線方向に一致するように設けているが、必ずしも燃焼室内周面の接線方向に一致する必要はなく、燃焼室にガスの旋回流を形成できる程度に、噴射方向が燃焼室内周面の接線方向から外れていても良い。   In this embodiment, the fuel gas injection nozzle and the oxygen-containing gas injection nozzle are provided so that the injection direction coincides with the tangential direction of the combustion chamber peripheral surface, but it does not necessarily match the tangential direction of the combustion chamber peripheral surface. The injection direction may be deviated from the tangential direction of the circumferential surface of the combustion chamber to such an extent that a swirl flow of gas can be formed in the combustion chamber.

また、この実施形態では、燃焼室への噴射口として管軸方向に沿ってスリットを設け、そのスリットに偏平形状の燃料ガス吹き込みノズル及び酸素含有ガス吹き込みノズルを接続しているが、燃焼室への噴射口として複数の小孔を管軸方向に配し、その小孔列に燃料ガスあるいは酸素含有ガスを吹き込むためのノズルを接続するようにしても良い。   In this embodiment, a slit is provided along the tube axis direction as an injection port to the combustion chamber, and a flat fuel gas injection nozzle and an oxygen-containing gas injection nozzle are connected to the slit. A plurality of small holes may be arranged in the direction of the tube axis as nozzles of the nozzles, and nozzles for injecting fuel gas or oxygen-containing gas may be connected to the small hole rows.

また、この実施形態では、燃料ガスを吹き込んでいるが、液体燃料を吹き込んでも良い。液体燃料としては、灯油、軽油、アルコール、A重油等の比較的低い温度で気化するものが好適である。   In this embodiment, fuel gas is blown in, but liquid fuel may be blown in. As the liquid fuel, those which vaporize at a relatively low temperature such as kerosene, light oil, alcohol, A heavy oil and the like are suitable.

また、この実施形態では、燃料ガスと酸素含有ガスを別々に吹き込んでいるが、燃料ガスと酸素含有ガスを予混合して吹き込んでも良い。   In this embodiment, the fuel gas and the oxygen-containing gas are blown separately, but the fuel gas and the oxygen-containing gas may be premixed and blown.

本発明の一実施形態に係る放射加熱装置の側面図である。It is a side view of a radiant heating device concerning one embodiment of the present invention. 図1のA−A断面図である。It is AA sectional drawing of FIG. 本発明の一実施形態に係る放射加熱装置の全体構成図である。It is a whole lineblock diagram of a radiant heating device concerning one embodiment of the present invention.

符号の説明Explanation of symbols

1 炉
1a 炉壁
2 管状火炎バーナ
3 放射加熱箱
3a 放射加熱箱の前面
3b 放射加熱箱の排ガス排出口
10 燃焼室
10a 燃焼室の先端
10b 燃焼室の後端
11a、11c 燃料ガス吹き込みノズル
11b、11d 酸素含有ガス吹き込みノズル
12 スリット
17 燃料ガスの流量調整弁
18 酸素含有ガスの流量調整弁
21 燃料ガスの流量計
22 酸素含有ガスの流量計
25 回転式蓄熱体
30 被加熱物
DESCRIPTION OF SYMBOLS 1 Furnace 1a Furnace wall 2 Tubular flame burner 3 Radiation heating box 3a Front side of radiant heating box 3b Exhaust gas discharge port 10 of radiant heating box 10 Combustion chamber 10a Combustion chamber rear end 11b Combustion chamber rear end 11a, 11c Fuel gas injection nozzle 11b, 11d Oxygen-containing gas blowing nozzle 12 Slit 17 Fuel gas flow rate adjustment valve 18 Oxygen-containing gas flow rate adjustment valve 21 Fuel gas flow rate meter 22 Oxygen-containing gas flow rate meter 25 Rotary regenerator 30 Heated object

Claims (5)

炉内の被加熱物を放射熱によって加熱するための放射加熱装置であって、先端が開放された管状の燃焼室と、ノズル噴射口が前記燃焼室の内面に開口し、燃料と酸素含有ガスを別々にあるいは予混合して吹き込むノズルを備え、各ノズルの噴射方向が燃焼室内周面の接線方向とほぼ一致している管状火炎バーナと、該管状火炎バーナからの火炎を取り囲み、炉内に向けて熱エネルギーを放射するための放射加熱箱とを備えていることを特徴とする放射加熱装置。   A radiant heating device for heating an object to be heated in a furnace by radiant heat, a tubular combustion chamber having an open end, a nozzle injection port opening on the inner surface of the combustion chamber, and a fuel and oxygen-containing gas Each of which is blown separately or premixed, a tubular flame burner in which the injection direction of each nozzle substantially coincides with the tangential direction of the circumferential surface of the combustion chamber, and surrounding the flame from the tubular flame burner, A radiant heating device comprising a radiant heating box for radiating thermal energy toward the radiant heating device. 前記放射加熱箱は、管状火炎バーナの燃焼室の軸心と直交する方向の長さが管状火炎バーナの燃焼室の軸心方向の長さに比べて長い形状であることを特徴とする請求項1に記載の放射加熱装置。   The length of the radiant heating box in a direction orthogonal to the axis of the combustion chamber of the tubular flame burner is longer than the length of the tubular flame burner in the direction of the axis of the combustion chamber. The radiant heating device according to 1. 前記放射加熱箱の前面が被加熱物と対向するように設けられていることを特徴とする請求項1又は2に記載の放射加熱装置。   The radiant heating device according to claim 1, wherein a front surface of the radiant heating box is provided so as to face an object to be heated. 前記管状火炎バーナに吹き込む酸素含有ガスと前記放射加熱箱から排出される燃焼排ガスとの間で熱交換させるための熱交換器を有していることを特徴とする請求項1〜3のいずれかに記載の放射加熱装置。   The heat exchanger for carrying out heat exchange between the oxygen-containing gas blown into the tubular flame burner and the combustion exhaust gas discharged from the radiation heating box is provided. The radiant heating device described in 1. 前記熱交換器が回転式蓄熱体であることを特徴とする請求項4に記載の放射加熱装置。   The radiant heating device according to claim 4, wherein the heat exchanger is a rotary heat accumulator.
JP2008096686A 2008-04-03 2008-04-03 Radiant heating device Expired - Lifetime JP4775398B2 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012193878A (en) * 2011-03-15 2012-10-11 Osaka Gas Co Ltd Tubular flame burner
JP2017219302A (en) * 2016-06-06 2017-12-14 東京瓦斯株式会社 Combustor
CN109761273A (en) * 2019-01-29 2019-05-17 北京拓首能源科技股份有限公司 A kind of oxygen heating furnace

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JPH11281015A (en) * 1998-01-27 1999-10-15 Nkk Corp Tubular flame burner
JPH11350046A (en) * 1998-06-03 1999-12-21 Nkk Corp Heating furnace
JP2001021140A (en) * 1999-07-05 2001-01-26 Ishikawajima Harima Heavy Ind Co Ltd Rotary heat accumulative heat exchanger
JP2001281018A (en) * 2000-03-31 2001-10-10 Tokyo Gas Co Ltd Flow-rate measuring device and gas meter

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06257972A (en) * 1993-03-02 1994-09-16 Otto:Kk Heat exchanger
JPH07218142A (en) * 1994-01-28 1995-08-18 Nkk Corp Radiant heater and combusting method thereof
JPH11281015A (en) * 1998-01-27 1999-10-15 Nkk Corp Tubular flame burner
JPH11350046A (en) * 1998-06-03 1999-12-21 Nkk Corp Heating furnace
JP2001021140A (en) * 1999-07-05 2001-01-26 Ishikawajima Harima Heavy Ind Co Ltd Rotary heat accumulative heat exchanger
JP2001281018A (en) * 2000-03-31 2001-10-10 Tokyo Gas Co Ltd Flow-rate measuring device and gas meter

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012193878A (en) * 2011-03-15 2012-10-11 Osaka Gas Co Ltd Tubular flame burner
JP2017219302A (en) * 2016-06-06 2017-12-14 東京瓦斯株式会社 Combustor
CN109761273A (en) * 2019-01-29 2019-05-17 北京拓首能源科技股份有限公司 A kind of oxygen heating furnace

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