WO2017195404A1 - Radiant tube burner - Google Patents

Radiant tube burner Download PDF

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Publication number
WO2017195404A1
WO2017195404A1 PCT/JP2017/003104 JP2017003104W WO2017195404A1 WO 2017195404 A1 WO2017195404 A1 WO 2017195404A1 JP 2017003104 W JP2017003104 W JP 2017003104W WO 2017195404 A1 WO2017195404 A1 WO 2017195404A1
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WO
WIPO (PCT)
Prior art keywords
fuel gas
combustion
radiant tube
tube
gas guide
Prior art date
Application number
PCT/JP2017/003104
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French (fr)
Japanese (ja)
Inventor
健介 川端
毅 有松
Original Assignee
中外炉工業株式会社
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Application filed by 中外炉工業株式会社 filed Critical 中外炉工業株式会社
Priority to KR1020177016942A priority Critical patent/KR101898831B1/en
Priority to CN201780001670.7A priority patent/CN107614976B/en
Publication of WO2017195404A1 publication Critical patent/WO2017195404A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C3/00—Combustion apparatus characterised by the shape of the combustion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/12—Radiant burners
    • F23D14/126—Radiant burners cooperating with refractory wall surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/20—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
    • F23D14/22—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/20—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
    • F23D14/22—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
    • F23D14/24—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other at least one of the fluids being submitted to a swirling motion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/70—Baffles or like flow-disturbing devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
    • F23D14/78—Cooling burner parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2203/00—Gaseous fuel burners
    • F23D2203/005—Radiant burner heads

Definitions

  • the present invention relates to a radiant tube burner.
  • a fuel gas guide pipe for guiding the fuel gas is provided in the radiant tube, and combustion air supplied into the radiant tube is guided to the outer peripheral side of the fuel gas guide pipe.
  • a radiant tube burner provided so that a combustion cylinder to be mixed and burned with fuel gas ejected from a fuel gas guide tube extends into the radiant tube from the tip of the fuel gas guide tube.
  • the radiant tube is configured such that the combustion air guided to the outer peripheral side of the guide tube and the fuel gas ejected from the fuel gas guide tube are quickly mixed in the combustion cylinder so that the fuel gas is burned appropriately. This is characterized in that it is possible to appropriately prevent the generation of soot (smoke) during combustion without melting or melting.
  • Patent Document 1 As described above, a radiant tube burner in which a fuel gas is mixed with combustion air and burned in the radiant tube is used.
  • Patent Document 2 combustion is performed by returning the combustion exhaust gas to a combustion cylinder in which fuel gas is mixed with combustion air and combusted.
  • Patent Document 3 the fuel gas is converted into combustion air.
  • a part of the combustion air is introduced to the downstream side of the combustion cylinder to be mixed and burned to perform two-stage combustion, thereby slowing the combustion and lowering the temperature of the flame and preventing the generation of NOx Has been shown to do.
  • Patent Document 4 a fuel gas and combustion air are supplied into a radiant tube in a swirling state around an axis and burned. Yes.
  • JP 2006-308175 A Japanese Patent Laid-Open No. 11-201416 Japanese Patent Laid-Open No. 11-201417 JP 2013-185791 A
  • This invention makes it a subject to solve the above problems in a radiant tube burner.
  • a fuel gas guide pipe for guiding the fuel gas is provided in the radiant tube, and combustion air supplied into the radiant tube is guided to the outer peripheral side of the fuel gas guide pipe.
  • a radiant tube burner provided so that a combustion cylinder to be mixed and burned with fuel gas ejected from a fuel gas guide tube extends into the radiant tube from the tip of the fuel gas guide tube.
  • the combustion air guided to the outer peripheral side of the guide tube and the fuel gas ejected from the fuel gas guide tube are quickly mixed in the combustion cylinder so that the fuel gas is burned appropriately, and the radiant It is an object of the present invention to appropriately prevent the generation of soot during combustion without causing the tube to melt.
  • a fuel gas guide tube for guiding the fuel gas is provided in the radiant tube, and combustion air supplied into the radiant tube is used.
  • a combustion cylinder that is guided to the outer peripheral side of the fuel gas guide tube and burns by mixing the combustion air with the fuel gas ejected from the fuel gas guide tube, rather than the tip of the fuel gas guide tube.
  • the combustion air is guided between the combustion tube and the radiant tube on the outer periphery of the combustion tube on the combustion air introduction side.
  • a deterrence plate for deterrence is provided, and combustion air guided to the outer peripheral side of the fuel gas guide tube is provided between the combustion cylinder and the fuel gas guide tube. And to provide a swirl vane to be mixed with the fuel gas while rotated.
  • the combustion air supplied into the radiant tube is suppressed by the suppression plate provided on the outer periphery of the combustion cylinder on the combustion air introduction side, and the cross-sectional area of the flow path Since the combustion air is guided between the combustion cylinder and the fuel gas guide pipe in a state where the amount of gas is reduced, the flow velocity of the combustion air increases. And since this combustion air is swirled at high speed by the swirl vanes, it is quickly mixed in the combustion cylinder with the fuel gas ejected from the tip of the fuel gas guide tube. Is sufficiently combusted, and soot generation during combustion is suppressed. In order to prevent the combustion cylinder from melting at this time, it is preferable to set the diameter and length of the combustion cylinder so that the combustion cylinder does not exceed the heat-resistant temperature due to the combustion.
  • the swirl vane for swirling the combustion air when the swirl vane for swirling the combustion air is provided between the combustion cylinder and the fuel gas guide tube, the swirl vane is connected to the fuel gas guide tube for guiding the fuel gas. It is preferable to provide in the vicinity of the tip. In this way, the combustion air swirled by the swirl vanes is more quickly mixed with the fuel gas immediately after being ejected from the tip of the fuel gas guide tube, so that the generation of soot during combustion is further suppressed. become.
  • the swirl vane when the swirl vane is provided between the combustion cylinder and the fuel gas guide pipe, the swirl vane inclined with respect to the axial direction of the fuel gas guide pipe is connected to the combustion cylinder and the fuel.
  • a plurality of gas guide pipes may be provided in the circumferential direction between the gas guide pipes.
  • the inclination angle ⁇ of the swirl vane inclined with respect to the axial direction of the fuel gas guide tube is set to 15 ° to 45 °. It is preferable to be in the range. This is because if the inclination angle ⁇ of the swirl vane is less than 15 °, it becomes difficult to sufficiently swirl the combustion air by the swirl vane and quickly mix with the fuel gas, while the inclination angle ⁇ of the swirl vane is 45 If it exceeds °, the flow of combustion air becomes uneven, making it difficult to properly mix with the fuel gas, and in any case, it is difficult to sufficiently suppress the generation of soot during combustion. It is to become.
  • a cooling vent for cooling the combustion cylinder by guiding a part of the combustion air to the outer periphery of the combustion cylinder can be provided on the suppression plate.
  • the radiant tube burner of the present invention when the combustion air is mixed with the fuel gas and burned in the combustion cylinder, even when the air ratio ⁇ is 1 or less, the combustion air is While being swirled by the swirl vane, the fuel gas ejected from the tip of the fuel gas guide tube is quickly mixed in the combustion cylinder so that the fuel gas is sufficiently combusted in the combustion cylinder. Occurrence of wrinkles is sometimes suppressed.
  • the combustion air is guided between the fuel gas guide tube and the combustion cylinder provided on the outer peripheral side thereof, and the combustion gas is swirled by the swirl vane while the fuel gas is swirled.
  • the fuel gas ejected from the tip of the guide tube and the combustion gas are mixed and burned in the combustion cylinder, so that the combustion air and the fuel gas are quickly mixed and burned in the combustion cylinder.
  • the generation of wrinkles at the time is suppressed, and the radiant tube is prevented from being melted.
  • FIG. 2 is a cross-sectional explanatory view taken along the line AA in FIG. 1 in the radiant tube burner according to the same embodiment.
  • FIG. 2 is a cross-sectional explanatory view taken along the line BB in FIG. 1 in the radiant tube burner according to the same embodiment.
  • the swirl vane when the swirl vane is provided between the combustion cylinder and the fuel gas guide tube, the swirl vane is inclined at a predetermined inclination angle ⁇ with respect to the axial direction of the fuel gas guide tube. It is the partial explanatory view which showed the state provided.
  • the radiant tube 11 is led into the heating furnace 1 through the furnace wall 1a of the heating furnace 1 as shown in FIG.
  • a guide pipe 12 is provided, an ignition spark plug 13 is provided at the center of the fuel gas guide pipe 12, and a combustion air supply pipe 14 for supplying combustion air into the radiant tube 11 is provided.
  • the combustion cylinder 15 is placed on the outer peripheral side of the fuel gas guide pipe 12 provided in the radiant tube 11 rather than the distal end portion of the fuel gas guide pipe 12.
  • the combustion air supplied into the radiant tube 11 as described above is guided between the combustion cylinder 15 and the fuel gas guide pipe 12.
  • combustion air guided between the combustion cylinder 15 and the fuel gas guide pipe 12 is swirled by the swirl vanes 16 provided between the combustion cylinder 15 and the fuel gas guide pipe 12,
  • the combustion air is mixed with the fuel gas ejected from the fuel gas ejection port 12 a provided at the distal end of the fuel gas guide tube 12. It is made to burn.
  • the combustion cylinder 15 When the combustion air supplied into the radiant tube 11 as described above is guided between the fuel gas guide tube 12 and the combustion cylinder 15 provided on the outer periphery thereof, the combustion cylinder 15 is used for combustion.
  • a deterrence plate 17 is provided at the end of the air introduction side to prevent the combustion air supplied into the radiant tube 11 from being guided between the combustion cylinder 15 and the radiant tube 11.
  • the outer diameter of the restraining plate 17 is made slightly smaller than the inner diameter of the radiant tube 11, and a part of the combustion air is burned into the combustion cylinder.
  • a cooling ventilation portion 17a for guiding the outer peripheral portion 15 to cool the combustion cylinder 15 is provided between the outer periphery of the restraining plate 17 and the inner periphery of the radiant tube 11, and the combustion
  • a plurality of air inlets 17b are provided in the circumferential direction between the cylinder 15 and the fuel gas guide pipe 12, and the combustion air supplied into the radiant tube 11 through these air inlets 17b is supplied to the combustion cylinder 15 described above.
  • the fuel gas guide pipe 12 is provided in the circumferential direction between the cylinder 15 and the fuel gas guide pipe 12, and the combustion air supplied into the radiant tube 11 through these air inlets 17b is supplied to the combustion cylinder 15 described above.
  • the fuel gas guide pipe 12 is provided in the circumferential direction between the cylinder 15 and the fuel gas guide pipe 12, and the combustion air supplied into the radiant tube 11 through these air inlets 17
  • cooling vents 17a are provided at a constant interval between the outer periphery of the suppression plate 17 and the inner periphery of the radiant tube 11 as in this embodiment, the suppression plate 17 and the like are attached to the combustion cylinder 15. In this state, it becomes easy to provide these in the radiant tube 11, while it is necessary to hold them in the radiant tube 11 by an appropriate holding member (not shown). Although not shown, it is possible to partially provide the cooling vent 17a on the restraining plate 17 or not to provide the cooling vent 17a.
  • the combustion air guided between the combustion cylinder 15 and the fuel gas guide pipe 12 as described above is swirled by the swirl vanes 16, and the fuel gas
  • the swirl vane 16 having a fan shape is inclined at a predetermined inclination angle ⁇ with respect to the axial direction X of the radiant tube 11 as shown in FIG.
  • a plurality of pieces are arranged in the circumferential direction between the gas guide pipes 12.
  • the swirl vane 16 is preferably arranged as close to the tip of the fuel gas guide tube 12 as possible, and at least a part of the swirl vane 16 is preferably located at the same position as the tip surface of the fuel gas guide tube 12.
  • the combustion cylinder 15 and the fuel gas guide pipe 12 are provided.
  • the combustion air guided between the fuel gas and the fuel gas is sufficiently swirled by the swirl vanes 16 and quickly mixed in the combustion cylinder 15 with the fuel gas ejected from the fuel gas ejection port 12a and burned.
  • the inclination angle ⁇ of the swirl vane 16 with respect to the axial direction X of the radiant tube 11 is set in the range of 15 ° to 45 °.
  • the combustion air guided between the combustion cylinder 15 and the fuel gas guide tube 12 as described above is swirled by the swirl vanes 16, and the combustion air is ejected from the fuel gas ejection port 12a. If the mixture is quickly mixed and burned in the combustion cylinder 15, the generation of soot during combustion is suppressed.
  • the diameter and length of the combustion cylinder 15 are set so that the combustion cylinder 15 does not exceed the heat-resistant temperature during combustion in order to prevent the combustion cylinder 15 from being melted by the combustion. .
  • the radiant tube burner 10 in this embodiment since the fuel gas and the combustion air are quickly mixed in the combustion cylinder 15 and burned as described above, the amount of the combustion air with respect to the fuel gas is reduced. Even when the combustion is performed with the air ratio ⁇ reduced to 1.0 or less, the generation of soot at the time of combustion is suppressed, and the radiant tube burner 10 having a wide adjustment range of the air ratio ⁇ is provided. be able to. Further, even when the air ratio ⁇ is burned around 1.0 and the air ratio ⁇ is randomly 1.0 or less, there is no need to worry about the generation of soot.
  • Heating furnace 1a Furnace wall 10: Radiant tube burner 11: Radiant tube 12: Fuel gas guide pipe 12a: Fuel gas outlet 13: Spark plug 14: Combustion air supply pipe 15: Combustion cylinder 16: Swivel blade 17: Suppression plate 17a: Cooling vent 17b: Air inlet X: Axial direction ⁇ of fuel gas guide tube: Inclination angle

Abstract

In the present invention, a fuel gas guiding pipe for guiding a fuel gas into a radiant tube is provided, and a combustion chamber, which leads air for combustion supplied inside the radiant tube toward the outer circumference side of the fuel gas guiding pipe and causes the air for combustion to be mixed and burnt with the fuel gas, is provided so as to extend from the tip portion of the fuel gas guiding pipe to the inside of the radiant tube. Also, an inhibiting plate is provided on an outer circumferential section of the combustion chamber on the side for introducing the air for combustion, for inhibiting the air for combustion from being led between the combustion chamber and the radiant tube, and a swirl vane is provided between the combustion chamber and the fuel gas guiding pipe for mixing the air for combustion with the fuel gas while causing the air for combustion led toward the outer circumference side of the fuel gas guiding pipe to swirl.

Description

ラジアントチューブバーナーRadiant tube burner
　本発明は、ラジアントチューブバーナーに関するものである。特に、ラジアントチューブ内に燃料ガスを案内する燃料ガス案内管が設けられると共に、ラジアントチューブ内に供給された燃焼用空気を前記の燃料ガス案内管の外周側に導き、この燃焼用空気を前記の燃料ガス案内管から噴出される燃料ガスと混合させて燃焼させる燃焼筒が、前記の燃料ガス案内管の先端部よりもラジアントチューブ内に延出するように設けられたラジアントチューブバーナーにおいて、燃料ガス案内管の外周側に導かれた燃焼用空気と燃料ガス案内管から噴出される燃料ガスとが前記の燃焼筒内において速やかに混合されて、燃料ガスが適切に燃焼されるようにし、ラジアントチューブが溶損したりすることなく、燃焼時に煤（スモーク）が発生するのを適切に防止できるようにした点に特徴を有するものである。 The present invention relates to a radiant tube burner. In particular, a fuel gas guide pipe for guiding the fuel gas is provided in the radiant tube, and combustion air supplied into the radiant tube is guided to the outer peripheral side of the fuel gas guide pipe. In a radiant tube burner provided so that a combustion cylinder to be mixed and burned with fuel gas ejected from a fuel gas guide tube extends into the radiant tube from the tip of the fuel gas guide tube. The radiant tube is configured such that the combustion air guided to the outer peripheral side of the guide tube and the fuel gas ejected from the fuel gas guide tube are quickly mixed in the combustion cylinder so that the fuel gas is burned appropriately. This is characterized in that it is possible to appropriately prevent the generation of soot (smoke) during combustion without melting or melting.
　従来から、工業用の加熱炉や熱処理炉等においては、被加熱物を加熱させるにあたり、火炎が被加熱物に接触して、被加熱物が酸化されたりするのを防止するため、特許文献１等に示されるように、ラジアントチューブ内において、燃料ガスを燃焼用空気と混合させて燃焼させるようにしたラジアントチューブバーナーが利用されている。 Conventionally, in an industrial heating furnace, a heat treatment furnace, and the like, in order to prevent a flame from coming into contact with a heated object and heating the heated object when the heated object is heated, Patent Document 1 As described above, a radiant tube burner in which a fuel gas is mixed with combustion air and burned in the radiant tube is used.
　ここで、このようなラジアントチューブバーナーにおいては、燃料ガスを燃焼用空気と混合させて燃焼させた場合に、ＮＯｘが発生して燃焼排ガス中にＮＯｘが含まれて排出されるおそれがある。 Here, in such a radiant tube burner, when fuel gas is mixed with combustion air and burned, NOx is generated and there is a possibility that NOx is contained and discharged in the combustion exhaust gas.
　このため、特許文献２においては、燃料ガスを燃焼用空気と混合させて燃焼させる燃焼筒に燃焼排ガスを戻すようにして燃焼を行うようにし、また特許文献３においては、燃料ガスを燃焼用空気と混合させて燃焼させる燃焼筒の下流側に燃焼用空気の一部を導いて２段階の燃焼を行うようにし、これにより燃焼を緩慢にして火炎の温度を下げ、ＮＯｘが発生するのを防止することが示されている。 For this reason, in Patent Document 2, combustion is performed by returning the combustion exhaust gas to a combustion cylinder in which fuel gas is mixed with combustion air and combusted. In Patent Document 3, the fuel gas is converted into combustion air. A part of the combustion air is introduced to the downstream side of the combustion cylinder to be mixed and burned to perform two-stage combustion, thereby slowing the combustion and lowering the temperature of the flame and preventing the generation of NOx Has been shown to do.
　しかし、このように燃焼を緩慢にして火炎の温度を下げて、燃料ガスを燃焼させるようにした場合、煤が発生しやすくなり、特に、燃料ガスに対する燃焼用空気の量を少なくし、空気比μ（実際の空気量／理論空気量）を１．０以下にして燃焼を行うと、煤の発生が多くなるという問題があった。 However, when the fuel gas is burned by slowing down the combustion and lowering the temperature of the flame in this way, soot tends to be generated, and in particular, the amount of combustion air relative to the fuel gas is reduced, and the air ratio When combustion was performed with μ (actual air amount / theoretical air amount) being 1.0 or less, there was a problem that soot generation increased.
　また、従来においては、特許文献４に示されるように、ラジアントチューブ内に、燃料ガスと燃焼用空気とを軸心周りの旋回流の状態で供給して燃焼させるようにしたものが示されている。 Further, conventionally, as disclosed in Patent Document 4, a fuel gas and combustion air are supplied into a radiant tube in a swirling state around an axis and burned. Yes.
　ここで、このように燃料ガスと燃焼用空気とを軸心周りの旋回流の状態で供給した場合、燃料ガスと燃焼用空気とが速やかに混合されて燃焼され、煤の発生が抑制されるようになるが、燃焼が素早く行われて火炎の温度が高くなり、このような燃焼が行われる燃料噴出部分の近くが局部的に過熱されて、ラジアントチューブが部分的に溶損するという問題があった。 Here, when the fuel gas and the combustion air are supplied in a swirling state around the axis as described above, the fuel gas and the combustion air are quickly mixed and burned, and soot generation is suppressed. However, there is a problem in that the radiant tube is partially melted due to local overheating of the vicinity of the fuel ejection part where the combustion is performed and the temperature of the flame is increased and the combustion is performed. It was.
特開２００６－３０８１７５号公報JP 2006-308175 A 特開平１１－２０１４１６号公報Japanese Patent Laid-Open No. 11-201416 特開平１１－２０１４１７号公報Japanese Patent Laid-Open No. 11-201417 特開２０１３－１８５７９１号公報JP 2013-185791 A
　本発明は、ラジアントチューブバーナーにおける前記のような問題を解決することを課題とするものである。 This invention makes it a subject to solve the above problems in a radiant tube burner.
　特に、ラジアントチューブ内に燃料ガスを案内する燃料ガス案内管が設けられると共に、ラジアントチューブ内に供給された燃焼用空気を前記の燃料ガス案内管の外周側に導き、この燃焼用空気を前記の燃料ガス案内管から噴出される燃料ガスと混合させて燃焼させる燃焼筒が、前記の燃料ガス案内管の先端部よりもラジアントチューブ内に延出するように設けられたラジアントチューブバーナーにおいて、燃料ガス案内管の外周側に導かれた燃焼用空気と燃料ガス案内管から噴出される燃料ガスとが、前記の燃焼筒内において速やかに混合されて、燃料ガスが適切に燃焼されるようにし、ラジアントチューブが溶損したりすることなく、燃焼時に煤が発生するのを適切に防止できるようにすることを課題とするものである。 In particular, a fuel gas guide pipe for guiding the fuel gas is provided in the radiant tube, and combustion air supplied into the radiant tube is guided to the outer peripheral side of the fuel gas guide pipe. In a radiant tube burner provided so that a combustion cylinder to be mixed and burned with fuel gas ejected from a fuel gas guide tube extends into the radiant tube from the tip of the fuel gas guide tube. The combustion air guided to the outer peripheral side of the guide tube and the fuel gas ejected from the fuel gas guide tube are quickly mixed in the combustion cylinder so that the fuel gas is burned appropriately, and the radiant It is an object of the present invention to appropriately prevent the generation of soot during combustion without causing the tube to melt.
　本発明に係るラジアントチューブバーナーにおいては、前記のような課題を解決するために、ラジアントチューブ内に燃料ガスを案内する燃料ガス案内管が設けられると共に、ラジアントチューブ内に供給された燃焼用空気を前記の燃料ガス案内管の外周側に導き、この燃焼用空気を前記の燃料ガス案内管から噴出される燃料ガスと混合させて燃焼させる燃焼筒が、前記の燃料ガス案内管の先端部よりもラジアントチューブ内に延出するように設けられたラジアントチューブバーナーにおいて、前記の燃焼筒の燃焼用空気導入側の外周部に、燃焼用空気が燃焼筒とラジアントチューブとの間に案内されるのを抑止する抑止プレートを設けると共に、前記の燃焼筒と燃料ガス案内管との間に、燃料ガス案内管の外周側に導かれた燃焼用空気を旋回させながら前記の燃料ガスと混合させる旋回羽根を設けるようにした。 In the radiant tube burner according to the present invention, in order to solve the above-described problems, a fuel gas guide tube for guiding the fuel gas is provided in the radiant tube, and combustion air supplied into the radiant tube is used. A combustion cylinder that is guided to the outer peripheral side of the fuel gas guide tube and burns by mixing the combustion air with the fuel gas ejected from the fuel gas guide tube, rather than the tip of the fuel gas guide tube. In the radiant tube burner provided to extend into the radiant tube, the combustion air is guided between the combustion tube and the radiant tube on the outer periphery of the combustion tube on the combustion air introduction side. A deterrence plate for deterrence is provided, and combustion air guided to the outer peripheral side of the fuel gas guide tube is provided between the combustion cylinder and the fuel gas guide tube. And to provide a swirl vane to be mixed with the fuel gas while rotated.
　ここで、このラジアントチューブバーナーにおいては、ラジアントチューブ内に供給された燃焼用空気が、前記の燃焼筒の燃焼用空気導入側の外周部に設けられた抑止プレートによって抑止され、流路の断面積を少なくした状態でこの燃焼用空気が燃焼筒と燃料ガス案内管との間に導かれるようになるため、燃焼用空気の流速が増加する。そして、この燃焼用空気が前記の旋回羽根により高速で旋回されながら、燃料ガス案内管の先端部から噴出される燃料ガスと燃焼筒内において速やかに混合されるため、この燃焼筒内において燃料ガスが十分に燃焼されるようになり、燃焼時における煤の発生が抑制される。なお、この時に前記の燃焼筒が溶損したりするのを防止するためには、前記の燃焼によって燃焼筒が耐熱温度以上にならないように、燃焼筒の径や長さを設定することが好ましい。 Here, in this radiant tube burner, the combustion air supplied into the radiant tube is suppressed by the suppression plate provided on the outer periphery of the combustion cylinder on the combustion air introduction side, and the cross-sectional area of the flow path Since the combustion air is guided between the combustion cylinder and the fuel gas guide pipe in a state where the amount of gas is reduced, the flow velocity of the combustion air increases. And since this combustion air is swirled at high speed by the swirl vanes, it is quickly mixed in the combustion cylinder with the fuel gas ejected from the tip of the fuel gas guide tube. Is sufficiently combusted, and soot generation during combustion is suppressed. In order to prevent the combustion cylinder from melting at this time, it is preferable to set the diameter and length of the combustion cylinder so that the combustion cylinder does not exceed the heat-resistant temperature due to the combustion.
　また、本発明のラジアントチューブバーナーにおいて、燃焼筒と燃料ガス案内管との間に、燃焼用空気を旋回させる旋回羽根を設けるにあたっては、この旋回羽根を、燃料ガスを案内する燃料ガス案内管の先端部の近傍に設けることが好ましい。このようにすると、旋回羽根により旋回された燃焼用空気が、燃料ガス案内管の先端部から噴出された直後に燃料ガスとより速やかに混合され、燃焼時における煤の発生が一層抑制されるようになる。 Further, in the radiant tube burner of the present invention, when the swirl vane for swirling the combustion air is provided between the combustion cylinder and the fuel gas guide tube, the swirl vane is connected to the fuel gas guide tube for guiding the fuel gas. It is preferable to provide in the vicinity of the tip. In this way, the combustion air swirled by the swirl vanes is more quickly mixed with the fuel gas immediately after being ejected from the tip of the fuel gas guide tube, so that the generation of soot during combustion is further suppressed. become.
　また、本発明のラジアントチューブバーナーにおいては、燃焼筒と燃料ガス案内管との間に旋回羽根を設けるにあたり、燃料ガス案内管の軸方向に対して傾斜した旋回羽根を、前記の燃焼筒と燃料ガス案内管との間において周方向に複数設けるようにすることができる。 In the radiant tube burner of the present invention, when the swirl vane is provided between the combustion cylinder and the fuel gas guide pipe, the swirl vane inclined with respect to the axial direction of the fuel gas guide pipe is connected to the combustion cylinder and the fuel. A plurality of gas guide pipes may be provided in the circumferential direction between the gas guide pipes.
　また、前記のように燃料ガス案内管の軸方向に対して旋回羽根を傾斜させて設けるにあたっては、燃料ガス案内管の軸方向に対して傾斜した旋回羽根の傾斜角θを１５°～４５°の範囲にすることが好ましい。これは、旋回羽根の傾斜角θが１５°未満になると、旋回羽根によって燃焼用空気を十分に旋回させて燃料ガスと速やかに混合させることが困難になる一方、旋回羽根の傾斜角θが４５°を超えると、燃焼用空気の流れにむらが生じて、燃料ガスと適切に混合させることが困難になり、何れの場合にも、燃焼時における煤の発生を十分に抑制することが困難になるためである。 Further, when the swirl vane is provided to be inclined with respect to the axial direction of the fuel gas guide tube as described above, the inclination angle θ of the swirl vane inclined with respect to the axial direction of the fuel gas guide tube is set to 15 ° to 45 °. It is preferable to be in the range. This is because if the inclination angle θ of the swirl vane is less than 15 °, it becomes difficult to sufficiently swirl the combustion air by the swirl vane and quickly mix with the fuel gas, while the inclination angle θ of the swirl vane is 45 If it exceeds °, the flow of combustion air becomes uneven, making it difficult to properly mix with the fuel gas, and in any case, it is difficult to sufficiently suppress the generation of soot during combustion. It is to become.
　また、本発明のラジアントチューブバーナーにおいては、前記の抑止プレートに、前記の燃焼用空気の一部を燃焼筒の外周部に導いて燃焼筒を冷却させる冷却用通気部を設けることができる。このようにすると、前記のように燃焼用空気を旋回羽根により旋回されながら燃料ガスと速やかに混合させて、燃料ガスを燃焼筒内において燃焼させる場合に、燃焼筒が局部的に過熱されるのが抑制されて、燃焼筒が耐熱温度以上とならないようにし、燃焼筒が部分的に溶損するのが防止される。 In the radiant tube burner of the present invention, a cooling vent for cooling the combustion cylinder by guiding a part of the combustion air to the outer periphery of the combustion cylinder can be provided on the suppression plate. In this way, when the combustion air is rapidly mixed with the fuel gas while being swirled by the swirl vanes as described above, and the fuel gas is burned in the combustion tube, the combustion tube is locally overheated. Is suppressed so that the combustion cylinder does not reach the heat-resistant temperature or higher, and the combustion cylinder is prevented from being partially melted.
　また、本発明のラジアントチューブバーナーにおいては、燃焼用空気を燃料ガスと混合させて燃焼筒内で燃焼させるにあたり、空気比μを１以下にした場合においても、前記のように燃焼用空気か前記の旋回羽根により旋回されながら、燃料ガス案内管の先端部から噴出される燃料ガスと燃焼筒内において速やかに混合されて、この燃焼筒内において燃料ガスが十分に燃焼されるようになり、燃焼時に煤が発生するのが抑制される。 Further, in the radiant tube burner of the present invention, when the combustion air is mixed with the fuel gas and burned in the combustion cylinder, even when the air ratio μ is 1 or less, the combustion air is While being swirled by the swirl vane, the fuel gas ejected from the tip of the fuel gas guide tube is quickly mixed in the combustion cylinder so that the fuel gas is sufficiently combusted in the combustion cylinder. Occurrence of wrinkles is sometimes suppressed.
　本発明におけるラジアントチューブバーナーにおいては、前記のように燃焼用空気を燃料ガス案内管とその外周側に設けた燃焼筒との間に導き、この燃焼用空気を旋回羽根により旋回させながら、燃料ガス案内管の先端部から噴出される燃料ガスと燃焼筒内において混合させて燃焼させるようにしたため、燃焼用空気と燃料ガスとが燃焼筒内において速やかに混合されて燃焼されるようになり、燃焼時における煤の発生が抑制されると共に、ラジアントチューブが溶損するのも防止されるようになる。 In the radiant tube burner according to the present invention, as described above, the combustion air is guided between the fuel gas guide tube and the combustion cylinder provided on the outer peripheral side thereof, and the combustion gas is swirled by the swirl vane while the fuel gas is swirled. The fuel gas ejected from the tip of the guide tube and the combustion gas are mixed and burned in the combustion cylinder, so that the combustion air and the fuel gas are quickly mixed and burned in the combustion cylinder. The generation of wrinkles at the time is suppressed, and the radiant tube is prevented from being melted.
本発明の一実施形態に係るラジアントチューブバーナーにおいて、ラジアントチューブを加熱炉の炉壁を通して加熱炉内に導く状態を示した概略断面説明図である。In the radiant tube burner which concerns on one Embodiment of this invention, it is a schematic sectional explanatory drawing which showed the state which guides a radiant tube in a heating furnace through the furnace wall of a heating furnace. 同実施形態に係るラジアントチューブバーナーにおいて、前記の図１におけるＡ－Ａ線断面説明図である。FIG. 2 is a cross-sectional explanatory view taken along the line AA in FIG. 1 in the radiant tube burner according to the same embodiment. 同実施形態に係るラジアントチューブバーナーにおいて、前記の図１におけるＢ－Ｂ線断面説明図である。FIG. 2 is a cross-sectional explanatory view taken along the line BB in FIG. 1 in the radiant tube burner according to the same embodiment. 同実施形態に係るラジアントチューブバーナーにおいて、燃焼筒と燃料ガス案内管との間に旋回羽根を設けるにあたり、旋回羽根を燃料ガス案内管の軸方向に対して所定の傾斜角θで傾斜するように設ける状態を示した部分説明図ある。In the radiant tube burner according to the same embodiment, when the swirl vane is provided between the combustion cylinder and the fuel gas guide tube, the swirl vane is inclined at a predetermined inclination angle θ with respect to the axial direction of the fuel gas guide tube. It is the partial explanatory view which showed the state provided.
　以下、本発明の実施形態に係るラジアントチューブバーナーを添付図面に基づいて具体的に説明する。なお、本発明に係るラジアントチューブバーナーは、下記の実施形態に示したものに限定されず、発明の要旨を変更しない範囲において、適宜変更して実施できるものである。 Hereinafter, a radiant tube burner according to an embodiment of the present invention will be specifically described with reference to the accompanying drawings. The radiant tube burner according to the present invention is not limited to those shown in the following embodiments, and can be implemented with appropriate modifications within a range not changing the gist of the invention.
　この実施形態におけるラジアントチューブバーナー１０においては、図１に示すように、ラジアントチューブ１１を加熱炉１の炉壁１ａを通して加熱炉１内に導くようにしている。 In the radiant tube burner 10 in this embodiment, the radiant tube 11 is led into the heating furnace 1 through the furnace wall 1a of the heating furnace 1 as shown in FIG.
　ここで、このラジアントチューブバーナー１０においては、加熱炉１の炉外に延出されたラジアントチューブ１１の一端部に、加熱炉１内に導入されたラジアントチューブ１１内に燃料ガスを案内する燃料ガス案内管１２を設け、この燃料ガス案内管１２の中心部に着火用の点火プラグ１３を設けると共に、ラジアントチューブ１１内に燃焼用空気を供給する燃焼用空気供給管１４を設けている。 Here, in the radiant tube burner 10, the fuel gas that guides the fuel gas into the radiant tube 11 introduced into the heating furnace 1 at one end of the radiant tube 11 that extends outside the furnace 1. A guide pipe 12 is provided, an ignition spark plug 13 is provided at the center of the fuel gas guide pipe 12, and a combustion air supply pipe 14 for supplying combustion air into the radiant tube 11 is provided.
　そして、この実施形態におけるラジアントチューブバーナー１０においては、ラジアントチューブ１１内に設けられた前記の燃料ガス案内管１２の外周側に、燃焼筒１５を燃料ガス案内管１２の先端部よりもラジアントチューブ１１内に延出するように設け、前記のようにラジアントチューブ１１内に供給された燃焼用空気を、この燃焼筒１５と燃料ガス案内管１２との間に導くようにしている。 In the radiant tube burner 10 in this embodiment, the combustion cylinder 15 is placed on the outer peripheral side of the fuel gas guide pipe 12 provided in the radiant tube 11 rather than the distal end portion of the fuel gas guide pipe 12. The combustion air supplied into the radiant tube 11 as described above is guided between the combustion cylinder 15 and the fuel gas guide pipe 12.
　また、このように燃焼筒１５と燃料ガス案内管１２との間に導かれた燃焼用空気を、燃焼筒１５と燃料ガス案内管１２との間に設けた旋回羽根１６により旋回させながら、燃料ガス案内管１２の先端部より前方に延出された燃焼筒１５内において、前記の燃焼用空気を燃料ガス案内管１２の先端に設けられた燃料ガス噴出口１２ａから噴出された燃料ガスと混合させて燃焼させるようにしている。 Further, while the combustion air guided between the combustion cylinder 15 and the fuel gas guide pipe 12 is swirled by the swirl vanes 16 provided between the combustion cylinder 15 and the fuel gas guide pipe 12, In the combustion cylinder 15 extending forward from the distal end portion of the gas guide tube 12, the combustion air is mixed with the fuel gas ejected from the fuel gas ejection port 12 a provided at the distal end of the fuel gas guide tube 12. It is made to burn.
　そして、前記のようにラジアントチューブ１１内に供給された燃焼用空気を、燃料ガス案内管１２とその外周に設けられた燃焼筒１５との間に導くにあたっては、前記の燃焼筒１５の燃焼用空気導入側の端部に、ラジアントチューブ１１内に供給された燃焼用空気が燃焼筒１５とラジアントチューブ１１との間に案内されるのを抑止する抑止プレート１７を設けるようにしている。 When the combustion air supplied into the radiant tube 11 as described above is guided between the fuel gas guide tube 12 and the combustion cylinder 15 provided on the outer periphery thereof, the combustion cylinder 15 is used for combustion. A deterrence plate 17 is provided at the end of the air introduction side to prevent the combustion air supplied into the radiant tube 11 from being guided between the combustion cylinder 15 and the radiant tube 11.
　ここで、この実施形態においては、図１及び図２に示すように、前記の抑止プレート１７の外径をラジアントチューブ１１の内径よりも僅かに小さくして、燃焼用空気の一部を燃焼筒１５の外周部に導いて燃焼筒１５を冷却させるための冷却用通気部１７ａを、前記の抑止プレート１７の外周とラジアントチューブ１１の内周との間に一定した間隔で設けると共に、前記の燃焼筒１５と燃料ガス案内管１２との間において、空気導入口１７ｂを周方向に複数設け、これらの空気導入口１７ｂを通して、ラジアントチューブ１１内に供給された燃焼用空気を、前記の燃焼筒１５と燃料ガス案内管１２との間に導くようにしている。 Here, in this embodiment, as shown in FIGS. 1 and 2, the outer diameter of the restraining plate 17 is made slightly smaller than the inner diameter of the radiant tube 11, and a part of the combustion air is burned into the combustion cylinder. A cooling ventilation portion 17a for guiding the outer peripheral portion 15 to cool the combustion cylinder 15 is provided between the outer periphery of the restraining plate 17 and the inner periphery of the radiant tube 11, and the combustion A plurality of air inlets 17b are provided in the circumferential direction between the cylinder 15 and the fuel gas guide pipe 12, and the combustion air supplied into the radiant tube 11 through these air inlets 17b is supplied to the combustion cylinder 15 described above. And the fuel gas guide pipe 12.
　そして、この実施形態のように、冷却用通気部１７ａを抑止プレート１７の外周とラジアントチューブ１１の内周との間に一定した間隔で設けるようにすると、燃焼筒１５に抑止プレート１７等を取り付けた状態で、これらをラジアントチューブ１１内に設ける作業が容易になる一方、これらをラジアントチューブ１１内に適当な保持部材（図示せず）によって保持させることが必要になる。なお、図示していないが、前記の抑止プレート１７に冷却用通気部１７ａを部分的に設けるようにしたり、また冷却用通気部１７ａを設けないようにすることも可能である。 If the cooling vents 17a are provided at a constant interval between the outer periphery of the suppression plate 17 and the inner periphery of the radiant tube 11 as in this embodiment, the suppression plate 17 and the like are attached to the combustion cylinder 15. In this state, it becomes easy to provide these in the radiant tube 11, while it is necessary to hold them in the radiant tube 11 by an appropriate holding member (not shown). Although not shown, it is possible to partially provide the cooling vent 17a on the restraining plate 17 or not to provide the cooling vent 17a.
　また、この実施形態においては、前記の燃焼筒１５内において、前記のように燃焼筒１５と燃料ガス案内管１２との間に導かれた燃焼用空気を旋回羽根１６により旋回させて、燃料ガス案内管１２先端の燃料ガス噴出口１２ａから噴出された燃料ガスと混合させるにあたり、前記の燃料ガス案内管１２の先端部の近傍において、図３に示すように、燃料ガス案内管１２の先端側から見た形状が扇形状になった旋回羽根１６を、図４に示すようにラジアントチューブ１１の軸方向Ｘに対して所定の傾斜角θで傾斜するようにして、前記の燃焼筒１５と燃料ガス案内管１２との間において周方向に複数枚（図に示す例では８枚）配置させるようにしている。なお、旋回羽根１６は、燃料ガス案内管１２の先端部のできるだけ近傍に配置するのが良く、旋回羽根１６の少なくとも一部が燃料ガス案内管１２の先端面と同じ位置にあるのが好ましい。 Further, in this embodiment, in the combustion cylinder 15, the combustion air guided between the combustion cylinder 15 and the fuel gas guide pipe 12 as described above is swirled by the swirl vanes 16, and the fuel gas When mixing with the fuel gas ejected from the fuel gas outlet 12a at the tip of the guide tube 12, as shown in FIG. 3, in the vicinity of the tip of the fuel gas guide tube 12, the tip side of the fuel gas guide tube 12 is located. As shown in FIG. 4, the swirl vane 16 having a fan shape is inclined at a predetermined inclination angle θ with respect to the axial direction X of the radiant tube 11 as shown in FIG. A plurality of pieces (eight pieces in the example shown in the figure) are arranged in the circumferential direction between the gas guide pipes 12. The swirl vane 16 is preferably arranged as close to the tip of the fuel gas guide tube 12 as possible, and at least a part of the swirl vane 16 is preferably located at the same position as the tip surface of the fuel gas guide tube 12.
　ここで、この実施形態においては、周方向に複数枚の旋回羽根１６を配置させるにあたり、図３に示すように、隣り合う旋回羽根１６が放射方向に沿って部分的に重なって反対側が見えないようにしている。このようにすると、前記の空気導入口１７ｂを通して燃焼筒１５と燃料ガス案内管１２との間に導かれた燃焼用空気が、旋回羽根１６に当たらないで直接通過するのが防止され、燃焼用空気が各旋回羽根１６に沿って旋回されながら、燃料ガス噴出口１２ａから噴出された燃料ガスと燃焼筒１５内において適切に混合されるようになる。 Here, in this embodiment, when arranging a plurality of swirl vanes 16 in the circumferential direction, as shown in FIG. 3, adjacent swirl vanes 16 partially overlap along the radial direction and the opposite side cannot be seen. I am doing so. In this way, the combustion air guided between the combustion cylinder 15 and the fuel gas guide pipe 12 through the air introduction port 17b is prevented from passing directly without hitting the swirl vane 16, and the combustion air The air is appropriately mixed in the combustion cylinder 15 with the fuel gas ejected from the fuel gas ejection port 12 a while being swirled along each swirl vane 16.
　また、図４に示すように、旋回羽根１６をラジアントチューブ１１の軸方向Ｘに対して所定の傾斜角θで傾斜するように設けるにあたっては、前記のように燃焼筒１５と燃料ガス案内管１２との間に導かれた燃焼用空気が、旋回羽根１６によって十分に旋回されて燃料ガス噴出口１２ａから噴出された燃料ガスと燃焼筒１５内において速やかに混合されて燃焼されるようにするため、ラジアントチューブ１１の軸方向Ｘに対する旋回羽根１６の傾斜角θが１５°～４５°の範囲になるようにしている。 As shown in FIG. 4, when the swirl vanes 16 are provided so as to be inclined at a predetermined inclination angle θ with respect to the axial direction X of the radiant tube 11, as described above, the combustion cylinder 15 and the fuel gas guide pipe 12 are provided. The combustion air guided between the fuel gas and the fuel gas is sufficiently swirled by the swirl vanes 16 and quickly mixed in the combustion cylinder 15 with the fuel gas ejected from the fuel gas ejection port 12a and burned. The inclination angle θ of the swirl vane 16 with respect to the axial direction X of the radiant tube 11 is set in the range of 15 ° to 45 °.
　そして、前記のように燃焼筒１５と燃料ガス案内管１２との間に導かれた燃焼用空気を旋回羽根１６により旋回させ、この燃焼用空気を燃料ガス噴出口１２ａから噴出された燃料ガスと燃焼筒１５内において速やかに混合させて燃焼させるようにすると、燃焼時における煤の発生が抑制される。なお、この実施形態においては、前記の燃焼によって燃焼筒１５が溶損するのを防止するため、燃焼時に燃焼筒１５が耐熱温度以上にならないように燃焼筒１５の径や長さを設定している。 Then, the combustion air guided between the combustion cylinder 15 and the fuel gas guide tube 12 as described above is swirled by the swirl vanes 16, and the combustion air is ejected from the fuel gas ejection port 12a. If the mixture is quickly mixed and burned in the combustion cylinder 15, the generation of soot during combustion is suppressed. In this embodiment, the diameter and length of the combustion cylinder 15 are set so that the combustion cylinder 15 does not exceed the heat-resistant temperature during combustion in order to prevent the combustion cylinder 15 from being melted by the combustion. .
　また、この実施形態におけるラジアントチューブバーナー１０においては、前記のように燃料ガスと燃焼用空気とを燃焼筒１５内において速やかに混合させて燃焼させるようにしたため、燃料ガスに対する燃焼用空気の量を少なくし、空気比μを１．０以下にして燃焼を行った場合においても、燃焼時における煤の発生が抑制されるようになり、空気比μの調整範囲の広いラジアントチューブバーナー１０を提供することができる。また、空気比μを１．０近辺で燃やし、空気比μがランダムに１．０以下になるような場合でも煤の発生を心配せずに済む。 In the radiant tube burner 10 in this embodiment, since the fuel gas and the combustion air are quickly mixed in the combustion cylinder 15 and burned as described above, the amount of the combustion air with respect to the fuel gas is reduced. Even when the combustion is performed with the air ratio μ reduced to 1.0 or less, the generation of soot at the time of combustion is suppressed, and the radiant tube burner 10 having a wide adjustment range of the air ratio μ is provided. be able to. Further, even when the air ratio μ is burned around 1.0 and the air ratio μ is randomly 1.0 or less, there is no need to worry about the generation of soot.
１　　　：加熱炉
１ａ　　：炉壁
１０　　：ラジアントチューブバーナー
１１　　：ラジアントチューブ
１２　　：燃料ガス案内管
１２ａ　：燃料ガス噴出口
１３　　：点火プラグ
１４　　：燃焼用空気供給管
１５　　：燃焼筒
１６　　：旋回羽根
１７　　：抑止プレート
１７ａ　：冷却用通気部
１７ｂ　：空気導入口
Ｘ　　　：燃料ガス案内管の軸方向
θ　　　：傾斜角 1: Heating furnace 1a: Furnace wall 10: Radiant tube burner 11: Radiant tube 12: Fuel gas guide pipe 12a: Fuel gas outlet 13: Spark plug 14: Combustion air supply pipe 15: Combustion cylinder 16: Swivel blade 17: Suppression plate 17a: Cooling vent 17b: Air inlet X: Axial direction θ of fuel gas guide tube: Inclination angle

Claims (5)

  1. 　ラジアントチューブ内に燃料ガスを案内する燃料ガス案内管が設けられると共に、ラジアントチューブ内に供給された燃焼用空気を前記の燃料ガス案内管の外周側に導き、この燃焼用空気を前記の燃料ガス案内管から噴出される燃料ガスと混合させて燃焼させる燃焼筒が、前記の燃料ガス案内管の先端部よりもラジアントチューブ内に延出するように設けられたラジアントチューブバーナーにおいて、前記の燃焼筒の燃焼用空気導入側の外周部に、燃焼用空気が燃焼筒とラジアントチューブとの間に案内されるのを抑止する抑止プレートを設けると共に、前記の燃焼筒と燃料ガス案内管との間に、燃料ガス案内管の外周側に導かれた燃焼用空気を旋回させながら前記の燃料ガスと混合させる旋回羽根を設けたことを特徴とするラジアントチューブバーナー。 A fuel gas guide pipe for guiding the fuel gas is provided in the radiant tube, and the combustion air supplied into the radiant tube is guided to the outer peripheral side of the fuel gas guide pipe, and the combustion air is guided to the fuel gas. In the radiant tube burner provided so that the combustion cylinder to be mixed and burned with the fuel gas ejected from the guide pipe extends into the radiant tube from the tip of the fuel gas guide pipe, the combustion cylinder And a depressing plate for preventing the combustion air from being guided between the combustion tube and the radiant tube, and between the combustion tube and the fuel gas guide tube. A radiant nozzle provided with swirl vanes for mixing the fuel gas while swirling combustion air guided to the outer peripheral side of the fuel gas guide tube Bubana.
  2. 　請求項１に記載のラジアントチューブバーナーにおいて、前記の旋回羽根を、燃料ガスを案内する燃料ガス案内管の先端部の近傍に設けたことを特徴とするラジアントチューブバーナー。 2. The radiant tube burner according to claim 1, wherein the swirl vane is provided in the vicinity of a tip portion of a fuel gas guide tube for guiding the fuel gas.
  3. 　請求項１又は請求項２に記載のラジアントチューブバーナーにおいて、前記の燃料ガス案内管の軸方向に対して傾斜した旋回羽根を、前記の燃焼筒と燃料ガス案内管との間において周方向に複数設けたことを特徴とするラジアントチューブバーナー。 3. The radiant tube burner according to claim 1, wherein a plurality of swirl vanes inclined with respect to an axial direction of the fuel gas guide tube are provided in a circumferential direction between the combustion cylinder and the fuel gas guide tube. A radiant tube burner characterized by being provided.
  4. 　請求項１～請求項３の何れか１項に記載したラジアントチューブバーナーにおいて、前記の抑止プレートに、前記の燃焼用空気の一部を燃焼筒の外周部に導いて燃焼筒を冷却させるための冷却用通気部を設けたことを特徴とするラジアントチューブバーナー。 The radiant tube burner according to any one of claims 1 to 3, wherein a part of the combustion air is guided to the outer peripheral portion of the combustion cylinder by the suppression plate to cool the combustion cylinder. A radiant tube burner provided with a cooling vent.
  5. 　請求項１～請求項４の何れか１項に記載したラジアントチューブバーナーにおいて、燃焼用空気を燃料ガスと混合させて燃焼筒内で燃焼させるにあたり、空気比μを１以下にしたことを特徴とするラジアントチューブバーナー。 The radiant tube burner according to any one of claims 1 to 4, wherein the air ratio μ is set to 1 or less when the combustion air is mixed with the fuel gas and burned in the combustion cylinder. To radiant tube burner.
PCT/JP2017/003104 2016-05-10 2017-01-30 Radiant tube burner WO2017195404A1 (en)

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CN109668148A (en) * 2019-01-17 2019-04-23 东莞市海新金属科技有限公司 Inverted gas infrared thermal radiation burner and gas appliance provided with same

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CN107614976B (en) 2019-03-08
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TW201740060A (en) 2017-11-16
JP6125078B1 (en) 2017-05-10
TWI623706B (en) 2018-05-11

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