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JP5200016B2 - Flame hole structure of gas burner - Google Patents

Flame hole structure of gas burner Download PDF

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Publication number
JP5200016B2
JP5200016B2 JP2009519357A JP2009519357A JP5200016B2 JP 5200016 B2 JP5200016 B2 JP 5200016B2 JP 2009519357 A JP2009519357 A JP 2009519357A JP 2009519357 A JP2009519357 A JP 2009519357A JP 5200016 B2 JP5200016 B2 JP 5200016B2
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flame hole
flame
pieces
piece
gas burner
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JP2010501818A (en
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ウンソン チョ
スンボン チョ
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Kyungdong Navien Co Ltd
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Kyungdong Navien Co Ltd
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    • 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
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
    • F23D14/08—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with axial outlets at the burner head
    • 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
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
    • 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
    • F23D14/48—Nozzles
    • F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
    • 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
    • F23D14/48—Nozzles
    • F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
    • F23D14/583—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration of elongated shape, e.g. slits
    • F23D14/586—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration of elongated shape, e.g. slits formed by a set of sheets, strips, ribbons or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2203/00—Gaseous fuel burners
    • F23D2203/10—Flame diffusing means
    • F23D2203/101—Flame diffusing means characterised by surface shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2203/00—Gaseous fuel burners
    • F23D2203/10—Flame diffusing means
    • F23D2203/101—Flame diffusing means characterised by surface shape
    • F23D2203/1017—Flame diffusing means characterised by surface shape curved
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2203/00—Gaseous fuel burners
    • F23D2203/10—Flame diffusing means
    • F23D2203/102—Flame diffusing means using perforated plates
    • F23D2203/1026—Flame diffusing means using perforated plates with slotshaped openings

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)

Description

本発明は、炎孔を通じた火炎の衝突噴射によって火炎の安定性を向上させ、不完全燃焼物の発生を減少させることができるガスバーナーの炎孔部構造に関する。   The present invention relates to a flame hole structure of a gas burner that can improve the stability of a flame and reduce the generation of incompletely burned products by means of a collision injection of a flame through a flame hole.

一般に、ボイラーや給湯器などに使用されるガスバーナーとして、以前にはブンゼンバーナーが使われたが、最近には公害物質の発生を減らし、燃焼室を小型化するために予混合燃焼方式のバーナーを主に使用している。   In general, Bunsen burners were used as gas burners for boilers and water heaters, but recently, premixed combustion type burners are used to reduce the generation of pollutants and to reduce the size of the combustion chamber. Is mainly used.

このような予混合燃焼バーナーには、燃料ガスと空気の予混合気を吐出させて火炎を形成するように多数の炎孔が形成された炎孔部が備わっているが、以前の炎孔部は、平板や円筒形からなる一つの板材に炎孔を穿孔した構造が使われていた。しかし、このような構造は、熱応力による変形によりバーナーの燃焼面がねじれたり、炎孔が損傷したり、不完全燃焼と逆火を誘発したりする恐れが高い問題があった。   Such a premixed combustion burner is provided with a flame hole portion in which a number of flame holes are formed so as to form a flame by discharging a premixed gas of fuel gas and air. Used a structure in which a flame hole was perforated on a single plate or cylinder. However, such a structure has a problem that the combustion surface of the burner is twisted due to deformation due to thermal stress, the flame hole is damaged, or incomplete combustion and flashback are induced.

このような短所を補完するために、金属繊維を織ったメタルファイバーマットやセラミックを焼結して製造したセラミック板などを用いた炎孔部構造も使われているが、このような構造は材料費が高く、製作方法が複雑で、製造原価が高くなり、予混合器の構造が複雑になることによる圧力損失の増加によって火炎が不安定になったり騒音が発生したり、それぞれの構造的特性による短所、例えばメタルファイバーマットの場合には柔軟性ゆえに、組立作業時の引っ張りによる変形、設置後のたわみなどにより燃焼面と炎孔が不均一に変形したり、セラミック焼結板構造の場合には上部に設置される熱交換器の凝縮水が落ちて炎孔面が損傷したりするなど多くの問題点があった。   To compensate for these disadvantages, flame hole structures using metal fiber mats woven with metal fibers and ceramic plates manufactured by sintering ceramics are also used. Expensive, complicated manufacturing methods, high manufacturing costs, complicated premixer structure, increased pressure loss due to increased flame pressure, noise and other structural characteristics For example, due to flexibility in the case of metal fiber mats, the combustion surface and flame holes are deformed unevenly due to deformation due to pulling during assembly work, deflection after installation, etc. There were many problems such as the condensate of the heat exchanger installed at the top falling and damaging the flame surface.

そのため、金属板材を用いた安価な構造でありながらも、金属板材で形成されることによる熱応力による変形問題を解決できるように改善された炎孔部構造が知られている。この炎孔部構造が図１に示されている。   For this reason, there is known an improved flame hole structure that can solve the problem of deformation due to thermal stress caused by being formed of a metal plate material while being an inexpensive structure using the metal plate material. This flame hole structure is shown in FIG.

図示された従来の炎孔部は、バーナー本体１００の上部に形成された装着具１１０に複数の炎孔片１２０を並列に設置して形成されたもので、各炎孔片１２０は下向開口された「逆コ」字の形断面形状を有するように折り曲げられた長いチャネル形態で形成され、その上面部に所定の間隔で多数の炎孔１２１が形成される。各炎孔片１２０の両端部は固定カバー１２３及びボルトによって、バーナー本体１００に固定される。   The conventional flame hole portion shown in the figure is formed by installing a plurality of flame hole pieces 120 in parallel on a mounting tool 110 formed on the upper part of the burner body 100, and each flame hole piece 120 has a downward opening. It is formed in the form of a long channel that is bent so as to have a cross-sectional shape of an “inverted U” shape, and a plurality of flame holes 121 are formed at predetermined intervals on the upper surface portion thereof. Both ends of each flame hole piece 120 are fixed to the burner body 100 by a fixing cover 123 and bolts.

このような炎孔部構造は金属板材を加工した炎孔片１２０で形成されるので、その製造費用が安く、分離した各炎孔片１２０が個別に固定されて熱応力による炎孔部全体の変形を減らすことができ、炎孔片１２０の装着個数を調節して、バーナーの発熱容量を容易に調節できるなどの長所がある。   Since such a flame hole structure is formed by the flame hole pieces 120 obtained by processing a metal plate material, its manufacturing cost is low, and each of the separated flame hole pieces 120 is individually fixed and the entire flame hole part due to thermal stress is The deformation can be reduced, and the heating capacity of the burner can be easily adjusted by adjusting the number of the flame hole pieces 120 mounted.

しかし、予混合燃焼バーナーの火炎はブンゼンバーナーの拡散火炎と異なり、燃焼可能領域が狭い特性を有しており、例えば、メタンが主成分であるＬＮＧを燃焼させた理想的な予混合燃焼火炎の場合、過剰空気比１．６以上では火炎が形成されない。実際に予混合燃焼器では、燃料と空気の混合が理想的に形成されない関係で、過剰空気比１．７程度まで燃焼が行われる場合もあるが、このような場合は火炎が飛ばされ不安定になる。   However, unlike the diffusion flame of the Bunsen burner, the flame of the premixed combustion burner has a characteristic that the combustible region is narrow. For example, an ideal premixed combustion flame of LNG combusting LNG mainly composed of methane. If the excess air ratio is 1.6 or more, no flame is formed. Actually, in a premixed combustor, there is a case where combustion is performed up to an excess air ratio of about 1.7 because the mixture of fuel and air is not ideally formed. In such a case, the flame is blown and unstable. become.

したがって、従来のように平面からなる炎孔片１２０の上面部に備わった炎孔１２１を通じて火炎が形成される場合、保炎構造を有することができず、リフティング現象により火炎が不安定な状態になりやすく、予混合器の負荷、例えば、流量や速度が増加することによって火炎の長さも増加するため、燃焼器の上側に設置される熱交換器に火炎が直接接触する可能性が多く、このような場合、火炎温度の低下に伴う不完全燃焼によって一酸化炭素などの公害物質が多量に発生する問題点があった。   Therefore, when a flame is formed through the flame hole 121 provided on the upper surface of the flat flame hole piece 120 as in the prior art, the flame holding structure cannot be provided, and the flame becomes unstable due to the lifting phenomenon. Since the length of the flame increases as the load of the premixer, for example, the flow rate or speed increases, the flame is likely to come into direct contact with the heat exchanger installed on the upper side of the combustor. In such a case, there has been a problem that a large amount of pollutants such as carbon monoxide is generated due to incomplete combustion accompanying a decrease in flame temperature.

本発明は、安価な費用で製作可能な構造でありながらも、火炎の安定性を高め、火炎の延長による不完全燃焼を防止できるガスバーナーの炎孔部構造を提供する。   The present invention provides a flame hole structure of a gas burner that can improve the stability of the flame and prevent incomplete combustion due to the extension of the flame while being a structure that can be manufactured at low cost.

以上のように本発明によれば、垂直方向に対して傾いた二つ以上の方向に形成された炎孔を通して、隣接する炎孔板間に火炎の衝突噴射がなされるようにすることによって、保炎性が向上して高負荷燃焼時にも良好な火炎安定性を維持でき、火炎の垂直方向の長さが短縮され、熱交換器と火炎の接触による不完全燃焼を防止でき、バーナーの大きさをさらに小型化しながらも、燃焼負荷を高めることができる効果がある。   As described above, according to the present invention, through the flame holes formed in two or more directions inclined with respect to the vertical direction, the collision injection of the flame is performed between the adjacent flame hole plates, Improved flame holding ability to maintain good flame stability even during high-load combustion, shorten the vertical length of the flame, prevent incomplete combustion due to contact between the heat exchanger and the flame, and increase the size of the burner There is an effect that the combustion load can be increased while further reducing the size.

また、要求性能と条件により炎孔片の形態又は配列を異なるようにして、前述した効果を満足あるいは増進させながらも、設計条件に適したバーナーを提供することができる。   In addition, it is possible to provide a burner suitable for the design conditions while satisfying or enhancing the above-described effects by changing the shape or arrangement of the flame hole pieces depending on the required performance and conditions.

また、炎孔片の上面部を折曲又は屈曲された形態で形成して、変形強度を増加させることによって、複数の炎孔片が一つの板材からなる構造で炎孔部を構成しても熱応力による変形を減らすことができるため、一層耐久性が向上した炎孔部構造を提供することができる。   Moreover, even if the flame hole portion is formed by a structure in which a plurality of flame hole pieces are made of one plate material by forming the upper surface portion of the flame hole piece in a bent or bent form and increasing the deformation strength. Since deformation due to thermal stress can be reduced, a flame hole structure with further improved durability can be provided.

従来のガスバーナーの炎孔部構造を示した斜視図である。It is the perspective view which showed the flame hole part structure of the conventional gas burner. 本発明に係るガスバーナーの炎孔部構造の第１実施形態を示した斜視図である。It is the perspective view which showed 1st Embodiment of the flame hole part structure of the gas burner which concerns on this invention. 図２に示された実施形態による炎孔部構造の要部を示した断面図である。It is sectional drawing which showed the principal part of the flame hole structure by embodiment shown by FIG. 本発明に係る炎孔部構造の第２実施形態を示した斜視図である。It is the perspective view which showed 2nd Embodiment of the flame hole structure which concerns on this invention. 本発明に係る炎孔部構造の第３実施形態を示した斜視図である。It is the perspective view which showed 3rd Embodiment of the flame hole structure which concerns on this invention. 本発明に係る炎孔部構造の第４実施形態を示した斜視図である。It is the perspective view which showed 4th Embodiment of the flame hole structure which concerns on this invention. 本発明に係る炎孔部構造の第５実施形態を示した斜視図である。It is the perspective view which showed 5th Embodiment of the flame hole structure which concerns on this invention. 本発明に係る炎孔部構造の第６実施形態を示した斜視図である。It is the perspective view which showed 6th Embodiment of the flame hole structure which concerns on this invention. 本発明に係る炎孔部構造の第７実施形態を示した斜視図である。It is the perspective view which showed 7th Embodiment of the flame hole structure which concerns on this invention.

前記目的を達成するために本発明は、ボイラーの熱交換器に熱を加えるように設置される予混合燃焼バーナーに備えられ、所定間隔で多数の炎孔が形成された複数の炎孔片をバーナー本体の装着具に並列に設置して形成された炎孔部構造であって、前記炎孔片のうち少なくとも一つは上面部が少なくとも二つ以上の方向に向かうように折曲又は屈曲された形態で形成され、前記上面部の相異なる方向に向かう各面別に相異なる方向に向かうように炎孔が形成されたガスバーナーの炎孔部構造である。   In order to achieve the above object, the present invention provides a premixed combustion burner installed to apply heat to a heat exchanger of a boiler, and includes a plurality of flame hole pieces each having a plurality of flame holes formed at predetermined intervals. A flame hole part structure formed in parallel with the burner body mounting tool, wherein at least one of the flame hole pieces is bent or bent so that the upper surface part is directed in at least two directions. The flame hole structure of the gas burner is formed in such a manner that the flame holes are formed in different directions for each surface of the upper surface portion in different directions.

上述した本発明の目的、特徴及び長所は、次の詳細な説明を通じて、さらに明らかになる。以下、添付された図面を参照し、本発明に係る好ましい実施形態について詳細に説明する。   The objects, features and advantages of the present invention described above will become more apparent through the following detailed description. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

図２は本発明に係るガスバーナーの炎孔部構造の第１実施形態を示した斜視図であり、図３はその要部構造を示した断面図である。   FIG. 2 is a perspective view showing a first embodiment of the flame hole structure of the gas burner according to the present invention, and FIG. 3 is a cross-sectional view showing the main structure thereof.

図２及び図３に示された実施形態のように、本発明の炎孔部構造は、バーナー本体１１の上部に形成された複数の装着具１３に各々複数の炎孔片２０が連接して並列に設置された構造からなる。   As in the embodiment shown in FIGS. 2 and 3, the flame hole structure of the present invention has a plurality of flame hole pieces 20 connected to a plurality of attachments 13 formed on the upper part of the burner body 11. It consists of a structure installed in parallel.

前記バーナー本体１１は、通常のもので、図示してはいないが、その下部に燃料ガスと空気が混合されるマニホールドが結合し、このマニホールドに燃料供給のためのガス供給管及び空気供給のための送風器が結合し、これは公知の構造であるので詳細な説明を省略する。   The burner main body 11 is a normal one and is not shown, but a manifold in which fuel gas and air are mixed is coupled to the lower portion thereof, and a gas supply pipe for supplying fuel and an air supply are connected to the manifold. Since this is a known structure, a detailed description thereof will be omitted.

前記バーナー本体１１の内部には、隔壁１２によって区切られた予混合気収容空間１４が容量により複数形成され、各収容空間１４は上向開口され、その上部に前記装着具１３が形成された構造を有する。   In the burner body 11, a plurality of premixed gas accommodating spaces 14 separated by a partition wall 12 are formed by a capacity, each accommodating space 14 is opened upward, and the mounting tool 13 is formed on the upper portion. Have

前記炎孔片２０は縦方向に沿って中央部が上面部２１をなすように横方向の両側が下向きに折り曲げられ、下向開口されたチャネル形態で形成されるものの、前記上面部２１は上側に突出したくさび形断面形態を有するように折曲形成され、折曲ライン２４によって区分された両面別に多数の炎孔２３が形成されて、各炎孔２３を通じた予混合気の吐出方向が垂直方向に対して傾いた方向になるように構成される。また、折曲ライン２４の両側面に形成された各炎孔２３は両側の炎孔２３が同一の位置ではなく、互い違いの位置に形成されるように配列されるのが好ましい。   The flame hole piece 20 is formed in a channel shape in which both sides in the lateral direction are bent downward so that the central portion forms the upper surface portion 21 along the vertical direction, and the upper surface portion 21 is formed on the upper side. Are bent so as to have a wedge-shaped cross-sectional shape, and a plurality of flame holes 23 are formed on both sides separated by a folding line 24, and the discharge direction of the premixed gas through each flame hole 23 is vertical. It is comprised so that it may become a direction inclined with respect to the direction. The flame holes 23 formed on both side surfaces of the folding line 24 are preferably arranged so that the flame holes 23 on both sides are not formed at the same position but at alternate positions.

前記バーナー本体１１の各装着具１３の両側端の部分には各々固定溝１６が形成され、各炎孔片２０の両側縦端部には前記固定溝１６に載置される支持突起２７が形成され、この支持突起２７の上部を加圧するようにボルト１７によってバーナー本体１１に締結される固定板１５によって炎孔片２０が固定される。また、各炎孔片２０の両側面部には熱応力によるねじれ防止及び冷却促進のため多数の凹溝２５が形成される。   Fixing grooves 16 are formed on both ends of each mounting tool 13 of the burner body 11, and support protrusions 27 placed on the fixing grooves 16 are formed on both vertical ends of each flame hole piece 20. The flame hole piece 20 is fixed by the fixing plate 15 fastened to the burner body 11 by the bolt 17 so as to pressurize the upper portion of the support protrusion 27. In addition, a large number of concave grooves 25 are formed on both side portions of each flame hole piece 20 to prevent twisting due to thermal stress and promote cooling.

上述した通り、本発明の炎孔部構造は、炎孔片２０の上面部２１が折り曲げられて、相異なる方向に向かう二つの傾斜面が形成され、この二つの傾斜面に炎孔２３が形成された構造なので、図３に示すように、各炎孔２３を通じて形成される火炎の噴射方向が垂直方向に対して傾いた方向になると同時に、隣接する炎孔片２０の炎孔２３を通じて形成される火炎が互いに衝突しながら、保炎構造を形成するようになる。   As described above, in the flame hole portion structure of the present invention, the upper surface portion 21 of the flame hole piece 20 is bent to form two inclined surfaces in different directions, and the flame hole 23 is formed on these two inclined surfaces. 3, as shown in FIG. 3, the injection direction of the flame formed through each flame hole 23 is inclined with respect to the vertical direction, and at the same time, it is formed through the flame hole 23 of the adjacent flame hole piece 20. As the flames collide with each other, a flame holding structure is formed.

これによって、従来の平板型火炎片に比べて、火炎の保炎性が向上し、火炎の空気比又は予混合器の負荷を高めても、火炎のリフティング及びそれによる不安定性が減少し、火炎の垂直方向の長さが短縮されて、熱交換器に火炎が直接接する場合に憂慮される一酸化炭素などの不完全燃焼物の発生も防止できるようになる。したがって、このような炎孔部構造の適用を通じて、バーナーの燃焼室の高さを低くでき、単位面積当りの熱負荷を高められるため、一層小さいサイズのバーナー構造でさらに高負荷の燃焼を実現できるようになる。さらに、炎孔片２０の幅と炎孔２３間の間隔を同一にする場合、従来に比べて各炎孔２３の長さはおよそ半分程度に減り、その数量はほぼ二倍程度に増加するので、このような効果は一層増大できる。   As a result, flame holding performance is improved compared to conventional flat flame pieces, and even if the air ratio of the flame or the premixer load is increased, the lifting of the flame and the resulting instability are reduced and the flame is reduced. The vertical length of the gas can be shortened to prevent incomplete combustion such as carbon monoxide, which is a concern when a flame is in direct contact with the heat exchanger. Therefore, through the application of such a flame hole structure, the height of the combustion chamber of the burner can be lowered and the heat load per unit area can be increased, so that even higher-load combustion can be realized with a smaller-sized burner structure. It becomes like this. Furthermore, when the width of the flame hole piece 20 and the interval between the flame holes 23 are made the same, the length of each flame hole 23 is reduced by about half compared to the conventional case, and the number thereof is increased by about twice. Such an effect can be further increased.

また、折曲ライン２４の両側面の炎孔片２０が互い違いの位置に配置されるようにすることによって、各炎孔片２０に炎孔２３を狭い間隔でぎっしりと形成した場合にも、隣接する炎孔２３を通じて形成された火炎が必要以上に衝突したり合わされるのを防止するため、さらに高負荷の燃焼が可能で燃焼強度の調節が容易なバーナー構造を実現することができる。また、同じ理由で、図示してはいないが、隣接して設置された二つの炎孔片２０の互いに向き合う炎孔２３も互い違いの位置になるように形成することができる。   Further, by arranging the flame hole pieces 20 on both sides of the bent line 24 at alternate positions, adjacent to each flame hole piece 20 even when the flame holes 23 are formed closely at a narrow interval. In order to prevent the flame formed through the flame holes 23 from colliding with each other more than necessary, it is possible to realize a burner structure capable of further high-load combustion and easy adjustment of the combustion intensity. For the same reason, although not shown in the figure, the flame holes 23 facing each other of the two flame hole pieces 20 installed adjacent to each other can also be formed at alternate positions.

一方、図示された実施形態では前記炎孔片２０が上側に突出したくさび形断面を有する形態で折り曲げられたものを例示したが、本発明はこれに限定されるのではなく、炎孔片２０に形成された炎孔２３が二つ以上の方向に向かうように炎孔片２０の上面部が二つ以上の方向に向かうように折曲又は屈曲形成された多様な形態で形成され得る。たとえば、図８に示すように、前記実施形態と類似に各炎孔片２０の上面部２１がくさび形断面形態を有するようにするものの、前述した実施形態と反対に折曲ライン２４の形成部が下側に向かうように、すなわちバーナー本体１１の内側に窪んだ形態で形成され得る。   On the other hand, in the illustrated embodiment, the flame hole piece 20 is bent in a form having a wedge-shaped cross section protruding upward, but the present invention is not limited to this, and the flame hole piece 20 is not limited thereto. The flame holes 23 may be formed in various forms such that the upper surface portion of the flame hole piece 20 is bent or bent so that the flame holes 23 are oriented in two or more directions. For example, as shown in FIG. 8, the upper surface portion 21 of each flame hole piece 20 has a wedge-shaped cross-sectional shape as in the above-described embodiment, but the formation portion of the bent line 24 is opposite to the above-described embodiment. Can be formed so as to be directed downward, that is, in a form recessed in the burner body 11.

また、このようなくさび形断面形態だけではなく、図４に示すように、前記炎孔片２０の上面部２１がほぼ円弧形の断面形態を有するように屈曲して形成され、この上面部２１の二つ以上の位置に垂直方向に対して傾いた方向に向かうように炎孔２３が形成された構造で形成されてもよい。このような形態の場合にも、前述したくさび形構造と同じように、図９に示すように、上面部２１が内側に窪んだ形態で形成され得る。   In addition to the wedge-shaped cross-sectional shape, the upper surface portion 21 of the flame hole piece 20 is bent so as to have a substantially arc-shaped cross-sectional shape as shown in FIG. It may be formed in a structure in which the flame hole 23 is formed at two or more positions of 21 so as to go in a direction inclined with respect to the vertical direction. In the case of such a configuration, as in the wedge-shaped structure described above, as shown in FIG.

場合によっては、前記炎孔片２０が全て同一の形態で形成されない場合もある。たとえば、図５に示すように、従来の炎孔片１２０と類似に平面形態の上面部２１ａを具備した炎孔片２０ａと、上述したように上面部２１が折曲又は屈曲形成された立体型炎孔片２０とが交互に配置されるようにするなど、異なる形態の炎孔片２０、２０ａが混合設置された構造で形成されてもよい。図５に示すように、炎孔片２０、２０ａを設置する場合には、平面形炎孔片２０ａを通じて形成された火炎の両側が、立体型炎孔片２０を通じて形成された火炎と衝突するようになるので、前述したような保炎性及び火炎安定性の向上効果を得ることができるだけでなく、火炎の衝突角度と間隔を一層広い範囲で容易に調節できる長所がある。   In some cases, the flame hole pieces 20 may not all be formed in the same form. For example, as shown in FIG. 5, a flame hole piece 20a having a planar upper surface portion 21a similar to the conventional flame hole piece 120, and a three-dimensional shape in which the upper surface portion 21 is bent or bent as described above. For example, the flame hole pieces 20 and 20a may be formed in a mixed structure such that the flame hole pieces 20 are alternately arranged. As shown in FIG. 5, when the flame hole pieces 20 and 20a are installed, both sides of the flame formed through the flat flame hole piece 20a collide with the flame formed through the three-dimensional flame hole piece 20. Therefore, not only can the above-described effects of improving flame holding performance and flame stability be obtained, but also the advantage is that the impact angle and interval of the flame can be easily adjusted over a wider range.

また、図５に示すように、バーナー本体１１の装着具１３の両側端に配置される炎孔片２０ｂの場合、火炎がバーナー本体１１に接触することによって発生し得る火炎の不安定と不完全燃焼を防止するために、炎孔片２０ｂの上部両面のうち他の炎孔片２０、２０ａに向かう面にだけ炎孔２３が形成され、バーナー本体１１の壁面に向かう部分には炎孔２３が形成されない構造で形成されるのが好ましい。   Further, as shown in FIG. 5, in the case of the flame hole pieces 20 b arranged on both side ends of the mounting tool 13 of the burner body 11, flame instability and incompleteness that may occur when the flame contacts the burner body 11. In order to prevent combustion, the flame hole 23 is formed only on the surface facing the other flame hole pieces 20, 20 a among the upper both surfaces of the flame hole piece 20 b, and the flame hole 23 is formed on the part facing the wall surface of the burner body 11. It is preferably formed with a structure that is not formed.

上記の通り、装着具１３の両側端に配置される炎孔片２０の他の実施形態として、図６に示すように、炎孔部内側に向かう面には傾斜面２８が形成され、炎孔部外側に向かう面は装着具１３の壁面に密着するように垂直面２９を形成し、前記傾斜面２８にだけ炎孔２３が形成された構造で炎孔片２０が形成されてもよい。   As described above, as another embodiment of the flame hole piece 20 disposed on both side ends of the mounting tool 13, as shown in FIG. The flame surface piece 20 may be formed in a structure in which a vertical surface 29 is formed so as to be in close contact with the wall surface of the wearing tool 13 and the flame hole 23 is formed only on the inclined surface 28.

また、前述した実施形態では各炎孔片２０が分離した個別部材で形成されたものを例示したが、場合によっては図７に示すように、一つの板材を折曲加工し、複数の炎孔片２０が一つの部材からなる構造で形成されてもよい。このような場合、各炎孔片２０の上面部２１が折曲又は屈曲された形態で形成されて変形に対する強度が増加し、下側に凹溝２５が形成されて応力を分散させられるようになるので、各炎孔片２０が分離した構造ではなくても、熱応力による変形を従来の板材形態の炎孔部構造に比べて減らせる長所がある。   In the above-described embodiment, each flame hole piece 20 is illustrated as being formed by separate members. However, in some cases, as shown in FIG. The piece 20 may be formed of a structure composed of one member. In such a case, the upper surface portion 21 of each flame hole piece 20 is formed in a bent or bent form to increase the strength against deformation, and a concave groove 25 is formed on the lower side to disperse the stress. Therefore, even if each flame hole piece 20 is not a separated structure, there is an advantage that deformation due to thermal stress can be reduced as compared with the conventional flame hole structure in the form of a plate material.

本発明は、安価な費用で製作可能な構造でありながらも、火炎の安定性を高め、火炎の延長による不完全燃焼を防止できるガスバーナーの炎孔部構造を提供することができる。   INDUSTRIAL APPLICABILITY The present invention can provide a flame hole structure of a gas burner that can improve the stability of the flame and prevent incomplete combustion due to the extension of the flame while being a structure that can be manufactured at a low cost.

Claims (4)

ボイラーの熱交換器に熱を加えるように設置される予混合燃焼バーナーに備えられ、所定間隔で多数の炎孔２３が形成された複数の炎孔片２０をバーナー本体１１の装着具１３に並列に設置して形成された炎孔部構造であって、
前記炎孔片２０のうち少なくとも一つは上面部２１が二つの方向に向かうように折曲又は屈曲された形態で形成され、前記上面部２１の相異なる方向に向かう各面別に相異なる方向に向かうように炎孔２３が形成され、
前記炎孔片２０の両側面部の下端部には、各炎孔片２０のねじれを防止するように熱応力を分散するように構成された、多数の凹溝２５が形成され、
前記炎孔片２０の上面部２１の二つの面に形成された各炎孔２３は、同一の位置ではなく、炎孔片２０の縦方向に互い違いに配列されるように形成されたことを特徴とする、ガスバーナーの炎孔部構造。A plurality of flame hole pieces 20, which are provided in a premixed combustion burner installed so as to apply heat to a heat exchanger of a boiler and in which a large number of flame holes 23 are formed at predetermined intervals, are arranged in parallel with the mounting tool 13 of the burner body 11. A flame hole structure formed by installing in
At least one of the flame hole pieces 20 is formed in a shape that is bent or bent so that the upper surface portion 21 is directed in two directions, and in different directions for each surface of the upper surface portion 21 that is directed in different directions. A flame hole 23 is formed to face,
A plurality of concave grooves 25 configured to disperse the thermal stress so as to prevent the torsion of each flame hole piece 20 are formed at the lower ends of both side surface portions of the flame hole piece 20,
The respective flame holes 23 formed on the two surfaces of the upper surface portion 21 of the flame hole piece 20 are formed not to be at the same position but to be alternately arranged in the vertical direction of the flame hole piece 20. The flame hole structure of the gas burner. 前記炎孔片２０の上面部２１が外側に突出したり内側に窪んだくさび形又は円弧形断面形態からなることを特徴とする請求項１に記載のガスバーナーの炎孔部構造。  2. The flame hole structure of a gas burner according to claim 1, wherein the upper surface portion 21 of the flame hole piece 20 has a wedge-shaped or arc-shaped cross-sectional shape protruding outward or recessed inward. 前記炎孔片２０のうちバーナー本体１１の装着具１３の両側端の部分に設置される炎孔片２０ｂは、相異なる方向に向かう各面のうち隣接する炎孔片２０に向かう面にだけ炎孔２３が形成されたことを特徴とする請求項１又は２に記載のガスバーナーの炎孔部構造。  Of the flame hole pieces 20, the flame hole pieces 20 b installed at both end portions of the mounting tool 13 of the burner body 11 are flames only on the surfaces facing the adjacent flame hole pieces 20 among the surfaces facing different directions. The flame hole structure of a gas burner according to claim 1 or 2, wherein a hole (23) is formed. 前記炎孔片２０は一つの板材を折曲加工し、複数の炎孔片２０が互いに連結した一つの部材で形成されるようにしたことを特徴とする請求項１又は２に記載のガスバーナーの炎孔部構造。  The gas burner according to claim 1 or 2, wherein the flame hole piece (20) is formed by bending one plate material, and a plurality of flame hole pieces (20) are connected to each other. Flame hole structure.
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EP2041490A4 (en) 2013-11-20
WO2008004734A1 (en) 2008-01-10
KR100778716B1 (en) 2007-11-22
EP2041490A1 (en) 2009-04-01
US20090291402A1 (en) 2009-11-26
CN101495806B (en) 2012-06-06
CN101495806A (en) 2009-07-29
JP2010501818A (en) 2010-01-21

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