JP5941400B2

JP5941400B2 - Combustor for heating with internal flame burner

Info

Publication number: JP5941400B2
Application number: JP2012267432A
Authority: JP
Inventors: 洋押部; 純子井川
Original assignee: Tokyo Gas Co Ltd
Current assignee: Tokyo Gas Co Ltd
Priority date: 2012-12-06
Filing date: 2012-12-06
Publication date: 2016-06-29
Anticipated expiration: 2032-12-06
Also published as: JP2014114971A

Description

本発明は、内炎式バーナを備えた加熱用燃焼器に関する。 The present invention relates to a heating combustor provided with an internal flame burner.

内炎式バーナを備えた加熱用燃焼器は、特許文献１または２などに記載されるように、よく知られている。通常、使用に当たっては、内炎式バーナの直上位置に鍋やフライパンのような調理容器である被加熱物を安定した姿勢で保持するために、例えば五徳と通称されるような被加熱物支持部材が用いられる。 A combustor for heating provided with an internal flame type burner is well known as described in Patent Document 1 or 2 or the like. Usually, in use, in order to hold a heated object, which is a cooking container such as a pan or a frying pan, at a position directly above the internal flame type burner, for example, a heated object support member such as commonly called Gotoku Is used.

特開２００４−２３２９７３号公報JP 2004-232297 A 特開２００９−２１０２０６号公報JP 2009-210206 A

従来、家庭用コンロのようなバーナを備えた加熱用燃焼器のための燃料ガスには、メタンやエタンやプロパンのような炭化水素系のものが用いられている。炭化水素系燃料を燃焼させるとＣＯ_２の発生を避けることができない。環境保全の観点からは、ＣＯ_２が発生しないあるいはＣＯ_２の発生が少ない水素を主成分とする燃料ガスを用いることが望ましい。 Conventionally, hydrocarbon fuels such as methane, ethane and propane have been used as fuel gas for a heating combustor equipped with a burner such as a household stove. When hydrocarbon fuel is burned, generation of CO ₂ cannot be avoided. From the viewpoint of environmental protection, it is desirable that the hydrogen generation is less of or CO ₂ CO ₂ is not generated using a fuel gas mainly.

しかしながら、水素原子を多く含んだ燃料を燃焼させると、生成物の１つとして多くの水（水蒸気）が発生する（式１、式２）。このため、コンロなどの加熱調理器において、鍋などの被加熱物の温度が低い段階では、被加熱物の表面に触れた水蒸気が凝縮して水滴となるのを避けられない。例えば、水素をメタンと同熱量燃やした場合、水素燃料による水蒸気はメタン燃料より約１．６倍多く発生する（式３）。
式１：CH₄＋２O₂ → CO₂＋２H₂O＋39.93 MJ/m³
式２：H₂ ＋ (1/2)O₂ →H₂O ＋12.78 MJ/m³
式３：3.12 H₂ ＋3.12 (1/2)O₂ → 3.12 H₂O ＋39.93 MJ/m³ (3.12=1.56×2)
〈なお、発熱量はいずれも標準状態におけるＨＨＶ（出典：ガス燃焼の理論と実際：財団法人省エネルギーセンター発行、ｐ．１１）〉 However, when a fuel containing a large amount of hydrogen atoms is burned, a large amount of water (water vapor) is generated as one of the products (Formula 1 and Formula 2). For this reason, in a heating cooker such as a stove, at the stage where the temperature of the heated object such as a pan is low, it is inevitable that the water vapor touching the surface of the heated object is condensed to form water droplets. For example, when hydrogen is burned with the same amount of heat as methane, water vapor generated by hydrogen fuel is generated approximately 1.6 times more than methane fuel (Equation 3).
Formula 1: CH ₄ + 2O ₂ → CO ₂ + 2H ₂ O + 39.93 MJ / m ³
Formula 2: H ₂ + (1/2) O ₂ → H ₂ O +12.78 MJ / m ³
Formula 3: 3.12 H ₂ +3.12 (1/2) O ₂ → 3.12 H ₂ O +39.93 MJ / m ³ (3.12 = 1.56 × 2)
<All calorific values are HHV under standard conditions (Source: Theory and practice of gas combustion: Issued by the Energy Conservation Center, p. 11)]

そのために、水素を多く含んだ燃料を家庭用コンロのような内炎式バーナを備えた加熱用燃焼器の燃料ガスとして用いると、大量の水滴が結露水として発生するようになり、その水滴がコンロ床に落ち、水たまりができて作業環境を悪化させることが起こりうる。また、落下する水滴により火炎温度の低下を引き起こしたり、内炎式バーナの炎孔を塞ぎ、所望の出力を得にくくなることも起こり得る。 Therefore, when fuel containing a lot of hydrogen is used as fuel gas for a heating combustor equipped with an internal flame type burner such as a household stove, a large amount of water droplets are generated as condensed water. It can happen that it falls on the stove floor, creating a puddle and deteriorating the working environment. In addition, the drop of water may cause a drop in flame temperature, or the flame hole of the internal flame burner may be blocked, making it difficult to obtain a desired output.

従来の内炎式バーナを備えた加熱用燃焼器は、前記のようにメタンやエタンやプロパンのような炭化水素系の燃料ガスを用いることを前提に作られている。この場合、燃料ガスの燃焼によって生成される水（水蒸気）は無視できる量であって、使用に当たって格別の問題は生じていない。しかし、今後、水素を多く含む燃料ガスを熱源として用いるようになったときに、上記のような問題が顕在化する恐れがある。 A conventional combustion combustor equipped with an internal flame burner is made on the assumption that a hydrocarbon fuel gas such as methane, ethane, or propane is used as described above. In this case, the amount of water (steam) generated by the combustion of the fuel gas is negligible, and no particular problem has occurred in use. However, when a fuel gas containing a large amount of hydrogen is used as a heat source in the future, the above-described problems may become apparent.

本発明は、内炎式バーナを備えた加熱用燃焼器において、今後生じる可能性のある上記の問題を解決することを課題としており、より具体的には、水素あるいは水素を多く含む燃料ガスを熱源として用いる場合であっても、燃焼時に発生する生成水に起因する水滴によって作業環境が悪化するのを効果的に回避できるようにした内炎式バーナを備えた加熱用燃焼器を開示することを第１の課題とする。また、燃焼時に発生する生成水に起因する水滴によって、火炎温度が低下したり、内炎式バーナの炎孔が塞がれて所望の出力を得にくくなるのを回避できるようにした内炎式バーナを備えた加熱用燃焼器を開示することを第２の課題とする。 An object of the present invention is to solve the above-mentioned problems that may occur in the future in a heating combustor equipped with an internal flame type burner, and more specifically, hydrogen or a fuel gas containing a large amount of hydrogen. Disclose a heating combustor equipped with an internal flame burner that can effectively avoid deterioration of the working environment due to water droplets caused by generated water generated during combustion even when used as a heat source. Is the first problem. Also, an internal flame type that can prevent the flame temperature from dropping due to water droplets caused by the generated water generated at the time of combustion or obstructing the flame hole of the internal flame type burner and making it difficult to obtain the desired output. Disclosed is a heating combustor provided with a burner.

本発明による内炎式バーナを備えた加熱用燃焼器は、前記内炎式バーナの下方に薄板状の水受け部材を備えることを特徴とする。 The heating combustor provided with the internal flame type burner according to the present invention is characterized in that a thin plate-shaped water receiving member is provided below the internal flame type burner.

本発明による内炎式バーナを備えた加熱用燃焼器を用いて被加熱物を加熱する場合において、被加熱物の外側面が低温状態にある加熱開始時に、燃焼ガス中に含まれる水蒸気が被加熱物の外側面上で凝縮して水滴となって落下しても、その水滴は内炎式バーナの下方に備えた薄板状の水受け部材に捕捉される。そのために、落下する水滴が内炎式バーナ下方のコンロ床面に達することはなく、コンロ床面に水たまりが形成されるようなことはない。それにより、良好な作業環境が維持される。 In the case of heating an object to be heated using a heating combustor equipped with an internal flame burner according to the present invention, water vapor contained in the combustion gas is covered at the start of heating when the outer surface of the object to be heated is in a low temperature state. Even if it condenses and falls as water droplets on the outer surface of the heated object, the water droplets are captured by a thin plate-shaped water receiving member provided below the internal flame type burner. Therefore, falling water drops do not reach the stove floor below the internal flame burner, and no puddle is formed on the stove floor. Thereby, a favorable working environment is maintained.

本発明において、薄板状の水受け部材は、内炎式バーナによる加熱時の熱に耐える材料であれば、任意の材料で作ることができる。また、水受け部材の上に落下してくる水滴の重さに耐えるだけの強度を備えていればよく、従って、水受け部材は薄板状のもので十分に所期の目的を達成することができる。 In the present invention, the thin plate-shaped water receiving member can be made of any material as long as it can withstand the heat generated by the internal flame burner. Moreover, it is only necessary to have a strength sufficient to withstand the weight of the water drops falling on the water receiving member. Therefore, the water receiving member is a thin plate and can sufficiently achieve the intended purpose. it can.

好ましくは、薄板状の水受け部材の表面には水滴を滞留させる手段が設けられる。水滴を滞留させる手段の例としては、適数本の凹溝や適数のエンボス（微細な凹凸加工）が挙げられる。また、薄板状の水受け部材が多数の細孔を備えた薄板や金網であってもよい。このような薄板状の水受け部材を用いることにより、落下した水滴が水受け部材から飛散したり落下するのを効果的に阻止することができる。細孔の孔径あるいは金網で編み目の大きさは、０．５〜３ｍｍ程度であれば所期の目的は達成可能である。 Preferably, a means for retaining water droplets is provided on the surface of the thin plate-shaped water receiving member. Examples of means for retaining water droplets include an appropriate number of concave grooves and an appropriate number of embossments (fine unevenness processing). Further, the thin plate-shaped water receiving member may be a thin plate or a wire net provided with a large number of pores. By using such a thin plate-shaped water receiving member, it is possible to effectively prevent the dropped water droplets from being scattered or dropped from the water receiving member. If the hole diameter of the fine pores or the mesh size of the wire mesh is about 0.5 to 3 mm, the intended purpose can be achieved.

本発明による加熱用燃焼器の一態様において、前記薄板状の水受け部材は前記内炎式バーナと一体に形成されており、内炎式バーナと薄板状の水受け皿との間には二次空気通路が形成されている。この態様の加熱用燃焼器では、加熱用燃焼器に対する薄板状の水受け部材の組付けを内炎式バーナの組み付けと同時に行うことができ、加熱用燃焼器の組立が容易となる。また、内炎式バーナと薄板状の水受け部材とを同時に取り外すことができるので、バーナ床等の清掃作業も容易となる。さらに、内炎式バーナと薄板状の水受け皿との間には二次空気通路が形成されているので、薄板状の水受け部材が内炎式バーナの燃焼に影響を与えることもない。 In one aspect of the heating combustor according to the present invention, the thin plate-shaped water receiving member is formed integrally with the inner flame type burner, and a secondary is provided between the inner flame type burner and the thin plate-shaped water receiving tray. An air passage is formed. In the heating combustor of this aspect, the thin plate-shaped water receiving member can be assembled to the heating combustor simultaneously with the assembly of the internal flame burner, and the heating combustor can be easily assembled. Moreover, since the internal flame type burner and the thin plate-shaped water receiving member can be removed at the same time, cleaning work of the burner floor and the like is also facilitated. Furthermore, since the secondary air passage is formed between the internal flame type burner and the thin plate-shaped water tray, the thin plate-shaped water receiving member does not affect the combustion of the internal flame type burner.

本発明による加熱用燃焼器の一態様において、前記内炎式バーナの上位には被加熱物を保持するための被加熱物支持部材がさらに備えられており、該被加熱物支持部材は、中央に開口部を備えた平板状の被加熱物保持部と、該被加熱物保持部から下方に延出する支持脚とを備え、少なくとも前記被加熱物保持部の表面には水滴を滞留させる手段が設けられていることを特徴とする。 In one aspect of the combustor for heating according to the present invention, a heated object support member for holding a heated object is further provided above the inner flame type burner, and the heated object support member has a central portion. Means for retaining a water droplet on at least the surface of the heated object holding portion, and a flat plate-like heated object holding portion provided with an opening, and a support leg extending downward from the heated object holding portion. Is provided.

上記態様の加熱用燃焼器を用いて被加熱物を加熱する場合において、被加熱物の外側面が低温状態にある加熱開始時に、燃焼ガス中に含まれる水蒸気が被加熱物の外側面上で凝縮して形成された水滴の内、一部は、内炎式バーナで形成される燃焼火炎内を通過して前記した薄板状の水受け部材に落下して、そこに滞留する。また、一部は、被加熱物支持部材を構成する平板状の被加熱物保持部の上に落下して、そこに滞留する。そのために、内炎式バーナで形成される燃焼火炎内を通過する水滴の量は、形成される全水滴量から被加熱物支持部材を構成する平板状の被加熱物保持部の上に滞留する水滴量を除いた量となり、結果として、燃焼時に発生する生成水に起因する水滴によって火炎温度が低下するのを大きく回避することができる。また、一部の水滴は被加熱物支持部材を構成する平板状の被加熱物保持部の上に落下することで、内炎式バーナの炎孔およびその周囲に落下する水滴の量は無いかごく少量であり、このことからも燃焼時に発生する生成水に起因する水滴によって火炎温度が低下するのを回避することができ、同時に、内炎式バーナの炎孔が塞がれて所望の出力を得にくくなるのも回避できる。 In the case of heating an object to be heated using the heating combustor of the above aspect, water vapor contained in the combustion gas is generated on the outer surface of the object to be heated at the start of heating when the outer surface of the object to be heated is in a low temperature state. A part of the water droplets formed by condensation passes through the combustion flame formed by the internal flame burner, falls on the above-described thin plate-shaped water receiving member, and stays there. Moreover, a part falls on the flat-shaped to-be-heated object holding | maintenance part which comprises a to-be-heated object support member, and stays there. Therefore, the amount of water droplets passing through the combustion flame formed by the internal flame type burner stays on the plate-shaped heated object holding portion constituting the heated object support member from the total formed water droplet amount. As a result, it is possible to largely prevent the flame temperature from being lowered by the water droplets caused by the generated water generated at the time of combustion. Also, if some of the water droplets fall on the flat heated object holding part that constitutes the heated object support member, is there no amount of water droplets falling on the flame holes of the internal flame type burner and its surroundings? This is a very small amount, and it is possible to avoid a drop in the flame temperature due to water droplets caused by the generated water generated during combustion. At the same time, the flame hole of the internal flame burner is blocked and the desired output is achieved. It is also possible to avoid becoming difficult to obtain.

それらのことから、本発明による内炎式バーナを備えた加熱用燃焼器は、水素または水素を多く含む燃料ガスを熱源として用いる場合に、実用上においてきわめて有効性の高いものとなる。 For these reasons, the combustor for heating provided with the internal flame burner according to the present invention is extremely effective in practice when hydrogen or a fuel gas containing a large amount of hydrogen is used as a heat source.

なお、前記被加熱物保持部の表面に設ける水滴を滞留させる手段は、水滴を被加熱物保持部の表面に一定時間滞留させておくことのできる手段であれば任意であり、例えば、適数本の凹溝や適数のエンボス（微細な凹凸加工）が挙げられる。また、多数の細孔を備えた薄板や金網であってもよい。細孔の孔径あるいは金網で編み目の大きさは、０．５〜３ｍｍ程度であれば所期の目的は達成可能である。 The means for retaining the water droplets provided on the surface of the object to be heated holding portion is arbitrary as long as it is a means capable of retaining water droplets on the surface of the object to be heated holding part for a certain period of time. Examples include a groove in a book and an appropriate number of embossments (fine unevenness processing). Further, it may be a thin plate or a wire net provided with a large number of pores. If the hole diameter of the fine pores or the mesh size of the wire mesh is about 0.5 to 3 mm, the intended purpose can be achieved.

本発明によれば、内炎式バーナを備えた加熱用燃焼器において、燃料ガスの燃焼時に生成される水（水蒸気）に起因する水滴によって、内炎式バーナの下方周辺の環境が悪化するのを効果的に回避することができる。また、本発明による内炎式バーナを備えた加熱用燃焼器の一態様では、落下する水滴により火炎温度が低下したり、所望の出力を得にくくなるのも回避できる。従って、本発明による内炎式バーナを備えた加熱用燃焼器は、熱源として、水素または水素を多く含んだ燃料ガスを用いるときに、特に有効となる。 According to the present invention, in a heating combustor equipped with an internal flame burner, the environment around the lower side of the internal flame burner is deteriorated by water droplets caused by water (water vapor) generated during combustion of fuel gas. Can be effectively avoided. Moreover, in one aspect of the combustor for heating provided with the internal flame burner according to the present invention, it is possible to avoid that the flame temperature is lowered due to the falling water droplets and it becomes difficult to obtain a desired output. Therefore, the combustor for heating provided with the internal flame type burner according to the present invention is particularly effective when hydrogen or a fuel gas containing a large amount of hydrogen is used as a heat source.

本発明による内炎式バーナを備えた加熱用燃焼器の第１の形態を示す概略的断面図。The schematic sectional drawing which shows the 1st form of the combustor for a heating provided with the internal flame type burner by this invention. 本発明による内炎式バーナを備えた加熱用燃焼器の第２の形態を示す概略的断面図。The schematic sectional drawing which shows the 2nd form of the combustor for a heating provided with the internal flame type burner by this invention. 本発明による内炎式バーナを備えた加熱用燃焼器の第３の形態を示す概略的断面図。The schematic sectional drawing which shows the 3rd form of the combustor for a heating provided with the internal flame type burner by this invention. 内炎式バーナを説明するための図。The figure for demonstrating an internal flame type burner. 薄板状の水受け部材の一例を説明するための図。The figure for demonstrating an example of a thin plate-shaped water receiving member. 第３の形態の加熱用燃焼器で用いる内炎式バーナと薄板状の水受け部材とを説明するための図。The figure for demonstrating the internal flame type burner and thin-plate shaped water receiving member which are used with the combustor for a heating of a 3rd form. 被加熱物支持部材の一形態を示す斜視図（ａ）と、図（ａ）のｂ−ｂ線に沿う断面図。The perspective view (a) which shows one form of a to-be-heated material support member, and sectional drawing which follows the bb line | wire of figure (a). 被加熱物支持部材の他の形態を示す部分的斜視図（ａ）と、図（ａ）のｂ−ｂ線に沿う断面図。The fragmentary perspective view (a) which shows the other form of a to-be-heated material support member, and sectional drawing which follows the bb line | wire of figure (a). 被加熱物支持部材のさらに他の形態を示す図。The figure which shows the further another form of a to-be-heated material support member.

以下、図面を参照しながら、本発明をいくつかの実施の形態に基づき説明する。 Hereinafter, the present invention will be described based on some embodiments with reference to the drawings.

［第１の形態］
図１は、本発明による内炎式バーナを備えた加熱用燃焼器の第１の形態を概略的断面で示している。この例において、加熱用燃焼器Ａ１は所定高さの燃焼器本体部１０を備え、燃焼器本体部１０には、内周壁１２と床面（底面）１３とを備えた所要深さの凹陥部１１が形成されている。そして、該凹陥部１１における燃焼器本体部１０の天面１４よりも上位の位置には、図４に示すような内炎式バーナ２０が図示しない適宜の支持手段により、燃焼器本体部１０に対して固定されている。 [First embodiment]
FIG. 1 schematically shows a first embodiment of a heating combustor equipped with an internal flame burner according to the present invention. In this example, the combustor A1 for heating includes a combustor main body 10 having a predetermined height, and the combustor main body 10 includes a concave portion having a required depth including an inner peripheral wall 12 and a floor surface (bottom surface) 13. 11 is formed. Then, an internal flame type burner 20 as shown in FIG. 4 is attached to the combustor main body 10 at a position higher than the top surface 14 of the combustor main body 10 by the appropriate support means (not shown). It is fixed against.

内炎式バーナ２０は環状のバーナ本体２１を有し、該バーナ本体２１の内部空間は燃料ガス通路２２となっている。バーナ本体２１の内面側は上方に次第に拡開する傾斜面２３とされており、該傾斜面２３には燃焼ガス通路２２に連通する適数の炎孔２４が形成されている。また、燃料ガス通路２２には図示しない燃料ガスの供給管が接続している。図示の内炎式バーナ２０は内炎式バーナの一形態にすぎず、例えば前記特許文献１あるいは２に記載されるような、任意の形態の内炎式バーナを用いることができる。 The internal flame burner 20 has an annular burner main body 21, and an internal space of the burner main body 21 is a fuel gas passage 22. An inner surface side of the burner body 21 is an inclined surface 23 that gradually expands upward, and an appropriate number of flame holes 24 communicating with the combustion gas passage 22 are formed in the inclined surface 23. Further, a fuel gas supply pipe (not shown) is connected to the fuel gas passage 22. The illustrated internal flame burner 20 is only one form of the internal flame burner, and an internal flame burner of any form as described in, for example, Patent Document 1 or 2 can be used.

前記内炎式バーナ２０の下方における前記凹陥部１１内の適所には、薄い金属板からなる円盤状の水受け皿３０が、図示しない適宜の手段により、燃焼器本体部１０に対して固定されている。水受け皿３０の平面視での大きさは、バーナ本体２１の内径よりは大きくされ、かつ、最大でも、水受け皿３０の外周３１と前記凹陥部１１の内周壁１２との間に燃焼用２次空気が通過できる所要の隙間ｓが形成される大きさとされる。 A disc-shaped water tray 30 made of a thin metal plate is fixed to the combustor main body 10 by an appropriate means (not shown) at an appropriate position in the recessed portion 11 below the internal flame burner 20. Yes. The size of the water tray 30 in plan view is larger than the inner diameter of the burner body 21 and, at the maximum, between the outer periphery 31 of the water tray 30 and the inner peripheral wall 12 of the recessed portion 11. The required gap s through which air can pass is formed.

水受け皿３０は、単に薄板状のものであってもよく、薄板の表面に水滴を一時的に滞留させるための適宜の手段が形成されていてもよい。また、図示されるように、上に凸の曲面をなす薄板であってもよい。図示しないが、水滴を一時的に滞留させる手段の具体例としては、適数本の凹溝やエンボス加工による凹凸などが挙げられる。さらには、図５に示すような細かいメッシュの金網３２や、パンチングメタルなどであってもよい。金網３２のメッシュ（編み目の大きさ）あるいはパンチングメタルでの孔径は、０．５〜３ｍｍであれば、水滴を一時的に保持するという所期の目的を達成することができる。また、水受け皿３０の厚みは１〜８ｍｍ程度であれば、水滴を一時的に保持するという所期の目的を達成することができる。 The water tray 30 may be simply a thin plate, or an appropriate means for temporarily retaining water droplets on the surface of the thin plate may be formed. Further, as shown in the figure, a thin plate having an upwardly convex curved surface may be used. Although not shown, specific examples of the means for temporarily retaining water droplets include an appropriate number of concave grooves and unevenness by embossing. Furthermore, a fine mesh wire net 32 as shown in FIG. 5 or a punching metal may be used. If the mesh of the metal mesh 32 (the size of the stitches) or the hole diameter of the punching metal is 0.5 to 3 mm, the intended purpose of temporarily holding water droplets can be achieved. Moreover, if the thickness of the water receiving tray 30 is about 1 to 8 mm, the intended purpose of temporarily holding water droplets can be achieved.

必須のものではないが、前記水受け皿３０と前記凹陥部１１の床面（底面）１３との間には、ファン４０が取り付けてある。このファン４０が回転することで、燃焼用２次空気が前記隙間ｓを通って内炎式バーナ２０の炎孔２４から噴出する燃焼火炎に積極的に送られる。 Although not essential, a fan 40 is attached between the water tray 30 and the floor surface (bottom surface) 13 of the recessed portion 11. As the fan 40 rotates, the combustion secondary air is actively sent to the combustion flame ejected from the flame hole 24 of the inner flame burner 20 through the gap s.

上記の加熱用燃焼器Ａ１において、その使用に際しては、燃焼器本体部１０の天面１４に、内炎式バーナ２０を跨ぐようにして、五徳と通称されている被加熱物支持部材５０が取り付けられる。被加熱物支持部材は、従来のバーナを備えた加熱用燃焼器で用いられているものであってよいが、この例では、図７、図８に示す形態の被加熱物支持部材５０を用いている。 In the heating combustor A1, the heated object support member 50, commonly referred to as Gotoku, is attached to the top surface 14 of the combustor body 10 so as to straddle the internal flame type burner 20. It is done. The object to be heated support member may be used in a heating combustor provided with a conventional burner. In this example, the object support member 50 having the form shown in FIGS. 7 and 8 is used. ing.

図７（ａ）に示すように、被加熱物支持部材５０は、中央に開口部５１を備えた平板状の被加熱物保持部５２と、該被加熱物保持部５２から下方に延出する支持脚５３とを備える。被加熱物支持部材５０は、図１に示すように、平板状の被加熱物保持部５２の中央開口部５１が内炎式バーナ２０の直上位となるようにして前記支持脚５３によって燃焼器本体部１０の天面１４上に取り付けられる。 As shown in FIG. 7A, the heated object support member 50 has a flat plate-shaped heated object holding part 52 having an opening 51 in the center, and extends downward from the heated object holding part 52. Support legs 53 are provided. As shown in FIG. 1, the heated object support member 50 is combusted by the support leg 53 so that the central opening 51 of the flat heated object holding part 52 is directly above the internal flame burner 20. It is attached on the top surface 14 of the main body 10.

図７（ｂ）に示すように、平板状をなす被加熱物保持部５２の上面には、全周に亘って凹溝５４が形成されている。図８に示すように、前記凹溝５４は、被加熱物保持部５２の上面に加えて、支持脚５３の表面にも形成されていてもよい。なお、図示しないが、凹溝５４に加えて、あるいは凹溝５４に変えて、被加熱物保持部５１の上面および支持脚５３の表面には、多数の微細な凹凸が形成されていてもよい。 As shown in FIG.7 (b), the groove 54 is formed in the upper surface of the to-be-heated material holding | maintenance part 52 which makes flat form over the perimeter. As shown in FIG. 8, the concave groove 54 may be formed on the surface of the support leg 53 in addition to the upper surface of the heated object holding portion 52. Although not shown, in addition to or instead of the groove 54, a large number of fine irregularities may be formed on the upper surface of the heated object holding portion 51 and the surface of the support leg 53. .

上記の加熱用燃焼器Ａ１の使用態様を説明する。使用に当たっては、図１に示すように、取り付けた被加熱物支持部材５０の被加熱物保持部５２の上に、内炎式バーナ２０の直上位置に底面Ｄ１が来るようにして被加熱物Ｄを載置する。被加熱物Ｄの中に水のように加熱されにくいものを収容し、内炎式バーナ２０を着火して燃料ガスを燃焼させる。高温の燃焼ガスは、図１に点線で示すように、被加熱物Ｄの底面Ｄ１に衝突し、その後、被加熱物支持部材５０の被加熱物保持部５２の上面と被加熱物Ｄの底面Ｄ１との接点付近を回り込むようにして、被加熱物Ｄの周側面Ｄ２に沿って上昇する。また、一部の燃焼ガスは、支持脚５３間を通過して上昇し、さらに被加熱物Ｄの周側面Ｄ２に沿って上昇する場合もある。 A usage mode of the above-described heating combustor A1 will be described. In use, as shown in FIG. 1, the heated object D is such that the bottom surface D <b> 1 comes on the heated object holding portion 52 of the attached heated object supporting member 50 so as to be directly above the internal flame burner 20. Is placed. A thing to be heated, such as water, is accommodated in the article to be heated D, and the internal flame burner 20 is ignited to burn the fuel gas. As shown by a dotted line in FIG. 1, the high-temperature combustion gas collides with the bottom surface D <b> 1 of the heated object D, and then the upper surface of the heated object holding portion 52 of the heated object support member 50 and the bottom surface of the heated object D. Ascending around the contact point with D1, it rises along the peripheral side surface D2 of the article D to be heated. In addition, some combustion gases may rise through the support legs 53 and further rise along the peripheral side surface D2 of the article D to be heated.

燃料ガスとして、水素または水素を多く含む燃料ガスを用いる場合、燃焼ガス中には多くの水（水蒸気）が含まれる。加熱開始当初は、被加熱物Ｄの底面Ｄ１および周側面Ｄ２の温度は低く、燃焼ガスが被加熱物Ｄの底面Ｄ１と衝接し、さらに周側面Ｄ２に接して上昇するときに、燃焼ガス中の水蒸気は底面Ｄ１および周側面Ｄ２に接することで温度が下がり、凝縮して水滴となる。 When hydrogen or a fuel gas containing a large amount of hydrogen is used as the fuel gas, the combustion gas contains a large amount of water (water vapor). At the beginning of heating, the temperature of the bottom surface D1 and the peripheral side surface D2 of the object to be heated D is low, and the combustion gas is in contact with the bottom surface D1 of the object to be heated D and further rises in contact with the peripheral side surface D2, When the water vapor contacts the bottom surface D1 and the peripheral side surface D2, the temperature drops and condenses into water droplets.

形成された水滴のうち、底面Ｄ１に形成された水滴は燃焼ガス中を落下することが起こり得るが、落下する水滴は水受け皿３０によって受け止められ、燃焼器本体部１０の前記凹陥部１１の床面（底面）１３に落下することはない。そのために、床面（底面）１３に水滴が散乱して作業環境を悪化する事態が生じるのを回避することができる。また、前記した被加熱物支持部材５０を用いていることで、被加熱物Ｄの周側面Ｄ２に形成された水滴は、被加熱物支持部材５０の被加熱物保持部５２の上面に形成した凹溝５４などによって捕集されるので、内炎式バーナ２０の燃焼面およびその周囲の天面１４や床面１３に落下するのも回避できる。それにより、落下する水滴により火炎温度が低下したり、所望の出力を得にくくなるのも回避できる。また、水滴が散乱して作業環境を悪化する事態が生じるのを回避することができる。 Of the formed water droplets, the water droplets formed on the bottom surface D <b> 1 may fall in the combustion gas, but the falling water droplets are received by the water receiving tray 30, and the floor of the concave portion 11 of the combustor main body 10. It does not fall on the surface (bottom surface) 13. Therefore, it is possible to avoid a situation in which water droplets are scattered on the floor surface (bottom surface) 13 to deteriorate the working environment. Further, by using the heated object support member 50 described above, water droplets formed on the peripheral side surface D2 of the heated object D are formed on the upper surface of the heated object holding portion 52 of the heated object support member 50. Since it is collected by the concave groove 54 or the like, it is possible to avoid falling on the combustion surface of the internal flame burner 20 and the surrounding top surface 14 or floor surface 13. Thereby, it is also possible to avoid that the flame temperature is lowered by the falling water droplets and it becomes difficult to obtain a desired output. Moreover, it is possible to avoid a situation in which water droplets are scattered and the working environment is deteriorated.

燃焼が継続して被加熱物Ｄの表面温度が上昇すると共に水滴は形成されなくなり、また、水受け皿３０および被加熱物支持部材５０の被加熱物保持部５２などの上面などに滞留した水滴も気化して消失する。それ以降は、通常の内炎式バーナを備えた加熱用燃焼器と同じ燃焼状態を継続する。 As the surface temperature of the object to be heated D rises as the combustion continues, water drops are no longer formed, and water drops staying on the upper surface of the water receiving tray 30 and the object to be heated holding part 52 of the object to be heated supporting member 50, etc. Vaporizes and disappears. Thereafter, the same combustion state as the heating combustor equipped with the normal internal flame burner is continued.

［第２の形態］
図２は、本発明による内炎式バーナを備えた加熱用燃焼器の第２の形態を概略的断面で示している。第２の形態の加熱用燃焼器Ａ２は、内炎式バーナ２０が燃焼器本体部１０の凹陥部１１内に入り込んだ姿勢で、燃焼器本体部１０に対して適宜の手段により固定されている点で、前記した第１の形態の加熱用燃焼器Ａ１と相違している。他の構成は、実質的に第１の形態の加熱用燃焼器Ａ１と同じであり、同じ符号を付すことで説明は省略する。この態様の加熱用燃焼器Ａ２は、支持脚５３の高さを前記第１の形態ほど高くしなくてよい、燃焼器本体部１０の天面１４がほぼフラットとなり見た目がよい、という固有の利点がある。 [Second form]
FIG. 2 schematically shows a second embodiment of a heating combustor with an internal flame burner according to the present invention. The heating combustor A2 of the second form is fixed to the combustor main body 10 by appropriate means in a posture in which the internal flame burner 20 enters the recessed portion 11 of the combustor main body 10. This is different from the above-described heating combustor A1 in the first embodiment. Other configurations are substantially the same as those of the heating combustor A1 of the first embodiment, and description thereof is omitted by attaching the same reference numerals. The heating combustor A2 of this aspect does not require the height of the support leg 53 to be as high as that of the first embodiment, and has the inherent advantage that the top surface 14 of the combustor body 10 is substantially flat and looks good. There is.

［第３の形態］
図３は、本発明による内炎式バーナを備えた加熱用燃焼器の第３の形態を概略的断面で示している。第３の形態の加熱用燃焼器Ａ３は、内炎式バーナ２０と水受け皿３０とが一体物として作られている点で、前記した第２の形態の加熱用燃焼器Ａ２と相違している。他の構成は、実質的に第２の形態の加熱用燃焼器Ａ２と同じであり、同じ符号を付すことで説明は省略する。 [Third embodiment]
FIG. 3 schematically shows a third embodiment of a heating combustor equipped with an internal flame burner according to the present invention. The third embodiment of the heating combustor A3 is different from the second embodiment of the heating combustor A2 in that the internal flame burner 20 and the water receiving tray 30 are made as a single body. . Other configurations are substantially the same as those of the heating combustor A2 of the second embodiment, and description thereof is omitted by attaching the same reference numerals.

すなわち、加熱用燃焼器Ａ３において、内炎式バーナ２０の環状のバーナ本体２１の下位には、図６に示すように、適数本の接続杆３３を介して、水受け皿３０が一体に固定されており、バーナ本体２１と固定された水受け皿３０には所要の隙間ｓ１が形成されている。燃焼時には、この隙間ｓ１を通って燃焼用二次空気が燃焼ガスに供給される。この態様では、内炎式バーナ２０と水受け皿３０とが一体物となっているので、燃焼器本体部１０に対する固定作業が容易となる。 That is, in the heating combustor A3, as shown in FIG. 6, the water receiving tray 30 is integrally fixed below the annular burner body 21 of the internal flame type burner 20 through an appropriate number of connecting rods 33. The required gap s1 is formed in the water receiving tray 30 fixed to the burner body 21. During combustion, the combustion secondary air is supplied to the combustion gas through the gap s1. In this aspect, since the internal flame type burner 20 and the water receiving tray 30 are integrated, the fixing operation to the combustor main body 10 is facilitated.

［他の形態］
本発明による内炎式バーナを備えた加熱用燃焼器Ａにおいて、特に図示はしないが、被加熱物支持部材として、前記した図７、図８に示す形態の被加熱物支持部材５０を用いることは必須でなく、従来から五徳として知られている任意の被加熱物支持部材を用いることができる。その場合でも、燃焼開始時に形成される水滴のほとんどは水受け皿３０によって受け止められるので、燃料ガスの燃焼時に生成される水（水蒸気）に起因する水滴よって、内炎式バーナの下方周辺の環境が悪化するのは効果的に回避することができる。 [Other forms]
In the heating combustor A provided with the internal flame type burner according to the present invention, although not shown in particular, as the heated object supporting member, the heated object supporting member 50 having the form shown in FIGS. 7 and 8 is used. Is not essential, and any object-to-be-heated support member that has been conventionally known as virtues can be used. Even in that case, since most of the water droplets formed at the start of combustion are received by the water receiving tray 30, the environment around the lower part of the internal flame burner is caused by the water droplets caused by the water (steam) generated during the combustion of the fuel gas. Deterioration can be effectively avoided.

また、被加熱物支持部材５０として、図９に示すように、平板状の被加熱物保持部５２が気体（燃焼ガス）は通過するが水滴は通過できない孔を有する多孔性材料５５で構成された被加熱物支持部材５０を用いることもできる。多孔性材料５５としては、パンチングメタルや金網のような材料を例示できる。実験によれば、多孔性材料５５に形成される孔の径は、０．５〜３ｍｍ程度であればよく、その範囲の孔であれば、内炎式バーナ２０が燃焼したときの燃焼ガスは通過することができ、加熱当初に被加熱物Ｄの底面Ｄ１や周側面Ｄ２に形成される水滴は通過できないことがわかっている。 Further, as shown in FIG. 9, as the heated object support member 50, a flat-shaped heated object holding part 52 is composed of a porous material 55 having holes through which gas (combustion gas) passes but water droplets cannot pass. The heated object support member 50 can also be used. Examples of the porous material 55 include materials such as punching metal and wire mesh. According to the experiment, the diameter of the hole formed in the porous material 55 may be about 0.5 to 3 mm. If the hole is in that range, the combustion gas when the internal flame burner 20 burns is It is known that water droplets that can pass through and that are formed on the bottom surface D1 and the peripheral side surface D2 of the article D to be heated at the beginning of heating cannot pass.

Ａ１〜Ａ３…本発明による内炎式バーナを備えた加熱用燃焼器、
Ｄ…被加熱物、
Ｄ１…被加熱物の底面、
Ｄ２…加熱用燃焼器の周側面、
１０…燃焼器本体部、
１１…燃焼器本体部に形成した凹陥部、
２０…内炎式バーナ、
２１…環状のバーナ本体、
２２…燃料ガス通路、
２４…炎孔、
３０…薄板状の水受け皿、
４０…ファン、
５０…被加熱物支持部材。 A1 to A3: a combustor for heating provided with an internal flame burner according to the present invention,
D ... object to be heated,
D1: bottom surface of the object to be heated,
D2 ... peripheral side surface of the combustor for heating,
10 ... combustor body,
11 ... a recessed portion formed in the combustor body,
20 ... Inner flame burner,
21 ... An annular burner body,
22 ... Fuel gas passage,
24 ... Flame hole,
30 ... laminar water tray,
40 ... Fan,
50: object to be heated supporting member.

Claims

A heating combustor provided with an internal flame burner, the heating combustor comprising a thin plate-shaped water receiving member below the internal flame burner, and an upper portion of the internal flame burner being covered A heated object support member for holding a heated object is further provided. The heated object support member includes a flat plate-shaped heated object holding unit having an opening in the center, and the heated object holding unit. and a support leg extending downwardly from the heating combustor characterized that you have on the surface of at least the object to be heated holding portion is provided with means for retention of the water droplets.

The combustor for heating according to claim 1, wherein means for retaining water droplets is provided on a surface of the thin plate-shaped water receiving member.

The thin plate water receiving member is formed integrally with the internal flame type burner, and a secondary air passage is formed between the internal flame type burner and the thin plate water receiving tray. The combustor for heating according to claim 1 or 2.