JP2015183971A - multiple tubular flame burner - Google Patents

multiple tubular flame burner Download PDF

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JP2015183971A
JP2015183971A JP2014063144A JP2014063144A JP2015183971A JP 2015183971 A JP2015183971 A JP 2015183971A JP 2014063144 A JP2014063144 A JP 2014063144A JP 2014063144 A JP2014063144 A JP 2014063144A JP 2015183971 A JP2015183971 A JP 2015183971A
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tubular flame
flame burner
burner
combustion
tube
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JP6206290B2 (en
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石井　純
Jun Ishii
純 石井
浅沼　稔
Minoru Asanuma
稔 浅沼
松野　英寿
Eiju Matsuno
英寿 松野
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JFE Steel Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a new tubular flame burner capable of greatly improving maximum combustion load and combustion stability without enlarging the burner, as a tubular flame burner capable of being used in various industrial furnaces.SOLUTION: A multiple tubular flame burner 10 is configured by aligning a pipe axis with the inside of an outside tubular flame burner (normal tubular flame burner) 11 and installing a small-sized tubular flame burner 12.

Description

本発明は、各種工業炉で使用可能な管状火炎バーナとして、バーナの大きさを殆ど変えずに、最大燃焼負荷と燃焼安定性を大幅に向上することができる多重管状火炎バーナに関するものである。   The present invention relates to a multi-tubular flame burner capable of greatly improving the maximum combustion load and combustion stability without changing the size of the burner as a tubular flame burner usable in various industrial furnaces.

管状火炎バーナは、非常に簡単な構造でありながら、燃料ガスと燃焼用空気を強力な旋回流で混合することにより高い燃焼効率を示す。また、旋回流の遠心力によって比重の重い未燃焼ガスが管壁付近に集まるため、これが断熱層となって抜熱を抑制し、発熱量の低い燃料ガスを燃焼することが可能である。特に、製鉄所においては、発熱量の低い高炉ガス、転炉ガス、コークス炉ガス等の副生ガスを大量に使用し、燃料ガスとして燃焼して各種加熱炉に使用しているため、これらの燃焼用バーナとしての運用が期待されている。   The tubular flame burner has a very simple structure, but exhibits high combustion efficiency by mixing fuel gas and combustion air in a powerful swirl flow. In addition, since unburned gas having a high specific gravity collects near the pipe wall due to the centrifugal force of the swirling flow, it becomes a heat insulating layer to suppress heat removal and to burn the fuel gas having a low calorific value. In particular, in steelworks, a large amount of by-product gases such as blast furnace gas, converter gas, coke oven gas, etc. with low calorific value are used and burned as fuel gas for use in various heating furnaces. Operation as a combustion burner is expected.

特許文献１においては、管状火炎バーナを製鉄所のような大規模設備で使用することを前提とし、１０〜４０ＭＷの大出力において管状火炎バーナを設計する方法が示されている。この中で管内径Ｄ（ｍ）と最大燃焼負荷Ｑ（ＭＷ）の関係について述べられており、管内径Ｄ（ｍ）は以下の式を満足するように規定すべきであるとしている。   In Patent Document 1, a method of designing a tubular flame burner at a large output of 10 to 40 MW is shown on the premise that the tubular flame burner is used in a large-scale facility such as a steel mill. The relationship between the pipe inner diameter D (m) and the maximum combustion load Q (MW) is described therein, and the pipe inner diameter D (m) should be defined so as to satisfy the following expression.

１００×（Ｑ／０．３）１／２≦１０００×Ｄ≦３００×（Ｑ／２）１／２ 100 × (Q / 0.3) 1/2 ≦ 1000 × D ≦ 300 × (Q / 2) 1/2

この式はバーナの最大燃焼負荷Ｑが管内径Ｄで規定されることを示しており、従来の管状火炎バーナにおいて最大燃焼負荷を上げるためには、管内径Ｄを拡大し大型化する必要があることになる。   This equation shows that the maximum combustion load Q of the burner is defined by the pipe inner diameter D. In order to increase the maximum combustion load in the conventional tubular flame burner, it is necessary to enlarge the pipe inner diameter D and increase the size. It will be.

特開２０１０−７８１６２号公報JP 2010-78162 A

管状火炎バーナにおいては、管内の旋回流による遠心力によって比重の重い未燃焼ガスが管壁側に偏在し、管壁近くに管状火炎が形成される。このため、バーナの最大燃焼負荷はほぼ管内面の表面積によって決定され、燃焼負荷をさらに大きくしたい場合には、前述したように管の内径を太くするか、もしくは管の長さを延長する等、バーナの大型化が必要である。   In the tubular flame burner, unburned gas having a high specific gravity is unevenly distributed on the tube wall side due to the centrifugal force caused by the swirling flow in the tube, and a tubular flame is formed near the tube wall. For this reason, the maximum combustion load of the burner is almost determined by the surface area of the inner surface of the tube, and if it is desired to further increase the combustion load, the inner diameter of the tube is increased as described above, or the length of the tube is extended, etc. A larger burner is required.

また、管状火炎バーナは、予混合バーナのようにガス供給側にバッファーを持たず、ガスの流量変動・圧力変動の影響を直接受けるため、ガスの流量変動・圧力変動時に混合比率が変化し失火し易いといった問題がある。失火に対応するためには、パイロットバーナを常時点火するといった対応が考えられるが、失火の際に発生する乱流渦によりパイロットバーナ自体も失火する可能性があり、パイロットバーナの火炎を保護する必要がある。このため、パイロットバーナの燃焼部を管状火炎バーナの外に設置する必要があり、バーナが大型化する問題がある。   Also, the tubular flame burner does not have a buffer on the gas supply side like the premixed burner, and is directly affected by the gas flow rate fluctuation and pressure fluctuation, so the mixing ratio changes at the time of gas flow rate fluctuation and pressure fluctuation and misfires occur. There is a problem that it is easy to do. In order to cope with misfires, it is possible to ignite the pilot burner at all times. However, the pilot burner itself may also be misfired due to the turbulent vortex generated at the time of misfire, and it is necessary to protect the flame of the pilot burner. There is. For this reason, it is necessary to install the combustion part of a pilot burner outside a tubular flame burner, and there exists a problem which a burner enlarges.

本発明は、上記のような事情に鑑みてなされたものであり、各種工業炉で使用可能な管状火炎バーナとして、バーナを大型化することなく、最大燃焼負荷と燃焼安定性を大幅に向上することができる新たな管状火炎バーナを提供することを目的とするものである。   The present invention has been made in view of the above circumstances, and as a tubular flame burner that can be used in various industrial furnaces, the maximum combustion load and combustion stability are greatly improved without increasing the size of the burner. It is an object to provide a new tubular flame burner that can be used.

上記課題を解決するために、本発明は以下のような特徴を有している。   In order to solve the above problems, the present invention has the following features.

［１］円管の一方の端部を閉塞し、円管内面の接線方向に向けて燃料ガスと燃焼用空気を送り、旋回流を発生させて、燃料ガスを燃焼する管状火炎バーナにおいて、外側に設置された外側管状火炎バーナと、該外側管状火炎バーナの内部に設置された内側管状火炎バーナとを備えていることを特徴とする多重管状火炎バーナ。   [1] A tubular flame burner that closes one end of a circular tube, sends fuel gas and combustion air toward the tangential direction of the inner surface of the circular tube, generates a swirling flow, and burns the fuel gas. An outer tubular flame burner installed in the outer tubular flame burner and an inner tubular flame burner installed inside the outer tubular flame burner.

［２］前記内側管状火炎バーナにおける旋回流の旋回方向と、前記外側管状火炎バーナにおける旋回流の旋回方向とが同一方向であることを特徴とする前記［１］に記載の多重管状火炎バーナ。   [2] The multiple tubular flame burner according to [1], wherein the swirling direction of the swirling flow in the inner tubular flame burner and the swirling direction of the swirling flow in the outer tubular flame burner are the same direction.

本発明の多重管状火炎バーナは、各種工業炉で使用可能な管状火炎バーナとして、バーナを大型化することなく、最大燃焼負荷と燃焼安定性を大幅に向上することができる。   The multiple tubular flame burner of the present invention is a tubular flame burner that can be used in various industrial furnaces, and can greatly improve the maximum combustion load and combustion stability without increasing the size of the burner.

すなわち、本発明においては、通常の管状火炎バーナを外側管状火炎バーナとし、その外側管状火炎バーナの内部に小さな管状火炎バーナを内側管状火炎バーナとして設置しているので、バーナの外形を大きく変えること無く、最大燃焼負荷を大幅に向上させる。   That is, in the present invention, the normal tubular flame burner is used as the outer tubular flame burner, and the small tubular flame burner is installed as the inner tubular flame burner inside the outer tubular flame burner. No significant increase in maximum combustion load.

また、内側管状火炎バーナが外側管状火炎の輻射熱により蓄熱するため、ガス圧力もしくは空気圧力の急激な変動などにより瞬間的に失火する場合においてもすばやい再着火が可能であり、保炎機能を有するため、失火に因る爆発の危険性を低減することが可能となる。   In addition, because the inner tubular flame burner stores heat by the radiant heat of the outer tubular flame, quick reignition is possible even in the event of a momentary misfire due to a sudden change in gas pressure or air pressure, etc. It is possible to reduce the risk of explosion due to misfire.

本発明の一実施形態における多重管状火炎バーナの縦断面図である。It is a longitudinal cross-sectional view of the multiple tubular flame burner in one Embodiment of this invention. 本発明の一実施形態における多重管状火炎バーナの横断面図である。It is a cross-sectional view of the multiple tubular flame burner in one embodiment of the present invention.

本発明の実施形態について述べる。   An embodiment of the present invention will be described.

管状火炎バーナにおいては、遠心力により比重の重い未燃ガスは管壁近くに集中し、管中心部には殆ど存在しない。つまり、管中心部はガス燃焼には殆ど寄与しない領域であると言える。そこで、この領域に小型の管状火炎バーナを設置し、新たな燃焼領域を設けることで、バーナ外形を大きく変更することなく、最大燃焼負荷を向上させることが可能となる。   In the tubular flame burner, unburned gas having a high specific gravity is concentrated near the tube wall due to centrifugal force and hardly exists in the center of the tube. In other words, it can be said that the central portion of the tube is a region that hardly contributes to gas combustion. Therefore, by installing a small tubular flame burner in this region and providing a new combustion region, it becomes possible to improve the maximum combustion load without greatly changing the outer shape of the burner.

具体的には、図１に本発明の一実施形態における多重管状火炎バーナ１０の縦断面図を示し、図２に本発明の一実施形態における多重管状火炎バーナ１０の横断面図を示すように、外側管状火炎バーナ（通常の管状火炎バーナ）１１の内部に管軸を一致させて小型の管状火炎バーナ１２を設置して、多重管状火炎バーナ（ここでは、二重管状火炎バーナ）１０を構成する。なお、図１、図２において、１、３、５、７はそれぞれ外側管状火炎バーナ１の本体、管状火炎、燃料ガス供給口、燃焼用空気供給口であり、２、４、６、８はそれぞれ内側管状火炎バーナ２の本体、管状火炎、燃料ガス供給口、燃焼用空気供給口である。   Specifically, FIG. 1 shows a longitudinal sectional view of a multiple tubular flame burner 10 in one embodiment of the present invention, and FIG. 2 shows a transverse sectional view of the multiple tubular flame burner 10 in one embodiment of the present invention. A multi-tubular flame burner (here, a double tubular flame burner) 10 is constructed by installing a small tubular flame burner 12 with the tube axis aligned within the outer tubular flame burner (normal tubular flame burner) 11. To do. 1, 2, 1, 3, 5, and 7 are a main body of the outer tubular flame burner 1, a tubular flame, a fuel gas supply port, and a combustion air supply port, respectively. These are the main body of the inner tubular flame burner 2, the tubular flame, the fuel gas supply port, and the combustion air supply port.

これによって、バーナ外形を大きく変更することなく、最大燃焼負荷を向上させることが可能となる。   As a result, the maximum combustion load can be improved without greatly changing the burner outer shape.

また、内側管状火炎バーナ１２の本体２は、外側管状火炎３の輻射熱により加熱され、高温の蓄熱体として機能する。このため、外側管状火炎バーナ１１、内側管状火炎バーナ１２のいずれかが燃料ガスもしくは燃焼用空気の供給圧の急激な変動や、バーナ出口圧力の急激な変動などにより、瞬間的に失火するような状況においても、圧力が正常に戻った瞬間に、急速な再着火が可能であり、失火に対する安定性が大幅に向上する。   Further, the main body 2 of the inner tubular flame burner 12 is heated by the radiant heat of the outer tubular flame 3 and functions as a high-temperature heat storage body. Therefore, any one of the outer tubular flame burner 11 and the inner tubular flame burner 12 may be misfired instantaneously due to a sudden change in the supply pressure of the fuel gas or combustion air, a sudden change in the burner outlet pressure, or the like. Even in the situation, rapid reignition is possible at the moment when the pressure returns to normal, and the stability against misfire is greatly improved.

ここで、内側管状火炎バーナ１２の本体２の材質としては、蓄熱量が大きく、耐熱性が高い素材が望ましく、各種耐火物、セラミックスなどを用いることが可能である。成形性の良さと耐熱性の高さ、気密性の高さから、セラミックスを用いることが望ましい。   Here, as a material of the main body 2 of the inner tubular flame burner 12, a material having a large heat storage amount and high heat resistance is desirable, and various refractories and ceramics can be used. It is desirable to use ceramics because of its good formability, high heat resistance, and high airtightness.

また、内側管状火炎バーナ本体２の管内径ＤＳは、外側管状火炎バーナ本体１の管内径をＤＬとした場合、０．３ＤＬ〜０．７ＤＬの範囲とすることが望ましい（０．３ＤＬ≦ＤＳ≦０．７ＤＬ）。なぜなら、内側管状火炎バーナ本体２の管内径ＤＳが０．３ＤＬ未満では、バーナ出力向上効果が小さく、また、内側管状火炎バーナ本体２の管内径ＤＳが０．７ＤＬ超えでは、外側管状火炎３の燃焼後の排ガスの通り道が狭くなり、安定した旋回流形成を阻害する恐れがあるためである。   The tube inner diameter DS of the inner tubular flame burner body 2 is preferably in the range of 0.3 DL to 0.7 DL when the tube inner diameter of the outer tubular flame burner body 1 is DL (0.3 DL ≦ DS ≦ 0.7 DL). This is because when the tube inner diameter DS of the inner tubular flame burner body 2 is less than 0.3 DL, the effect of improving the burner output is small, and when the tube inner diameter DS of the inner tubular flame burner body 2 exceeds 0.7 DL, the outer tubular flame 3 This is because the passage of exhaust gas after combustion becomes narrow, and there is a risk of hindering the formation of a stable swirling flow.

また、外側管状火炎バーナ１１と内側管状火炎バーナ１２の長さは、供給する燃料ガス比率を変更することにより変更可能であるが、外側管状火炎バーナ１１と内側管状火炎バーナ１２の燃焼がなるべく同じ長さで終了するように設定することで最も短くすることが可能となる。   The lengths of the outer tubular flame burner 11 and the inner tubular flame burner 12 can be changed by changing the supplied fuel gas ratio, but the combustion of the outer tubular flame burner 11 and the inner tubular flame burner 12 is as much as possible. It becomes possible to make it the shortest by setting to end with the length.

一例として、外側管状火炎バーナ(通常の管状火炎バーナ)１１が長さＬにおいて燃焼が完了する場合、燃焼負荷を変更しない場合の多重管状火炎バーナ（二重管状火炎バーナ）１０の長さＬ’は以下の式で示される。   As an example, when the outer tubular flame burner (normal tubular flame burner) 11 completes combustion at the length L, the length L ′ of the multiple tubular flame burner (double tubular flame burner) 10 when the combustion load is not changed. Is represented by the following equation.

Ｌ’＝Ｌ×（ＤＬ／（ＤＳ＋ＤＬ））     L ′ = L × (DL / (DS + DL))

なお、外側管状火炎バーナ１１の旋回流（管状火炎）３の旋回方向と、内側管状火炎バーナ１２の旋回流（管状火炎）４の旋回方向とは、旋回方向が同一方向であっても逆方向であってもよいが、燃焼後排ガス流れの安定性を確保するためには、同一方向とすることが望ましい。   The swirl direction of the swirl flow (tubular flame) 3 of the outer tubular flame burner 11 and the swirl direction of the swirl flow (tubular flame) 4 of the inner tubular flame burner 12 are opposite to each other even if the swirl direction is the same direction. However, in order to ensure the stability of the exhaust gas flow after combustion, the same direction is desirable.

このようにして、この実施形態における多重管状火炎バーナ１０は、各種工業炉で使用可能な管状火炎バーナとして、バーナを大型化することなく、最大燃焼負荷と燃焼安定性を大幅に向上することができる。   In this way, the multiple tubular flame burner 10 in this embodiment is a tubular flame burner that can be used in various industrial furnaces, and can greatly improve the maximum combustion load and combustion stability without increasing the size of the burner. it can.

すなわち、この実施形態における多重管状火炎バーナ１０は、通常の管状火炎バーナを外側管状火炎バーナ１１とし、その外側管状火炎バーナ１１の内部に管軸を一致させて小さな管状火炎バーナを内側管状火炎バーナ１２として設置しているので、バーナの外形を大きく変えること無く、最大燃焼負荷を大幅に向上させる。   That is, in the multiple tubular flame burner 10 in this embodiment, an ordinary tubular flame burner is used as an outer tubular flame burner 11, and a tube axis is aligned with the inside of the outer tubular flame burner 11 so that a small tubular flame burner is used as an inner tubular flame burner. Since it is installed as 12, the maximum combustion load is greatly improved without greatly changing the outer shape of the burner.

また、内側管状火炎バーナ１２が外側管状火炎３の輻射熱により蓄熱するため、ガス圧力もしくは空気圧力の急激な変動などにより瞬間的に失火する場合においてもすばやい再着火が可能であり、保炎機能を有するため、失火に因る爆発の危険性を低減することが可能となる。   Further, since the inner tubular flame burner 12 stores heat by the radiant heat of the outer tubular flame 3, it is possible to perform quick re-ignition even in the case of a momentary misfire due to a sudden change in gas pressure or air pressure. Therefore, it is possible to reduce the risk of explosion due to misfire.

詳説すると、この実施形態では、従来燃焼のために有効に使われていなかった、管状火炎バーナ（外側管状火炎バーナ）１１の管状火炎３内部の部分を利用して新たに管状火炎バーナ（内側管状火炎バーナ）１２を設置しているので、バーナの外形を大きく変えることなく、最大燃焼負荷を向上することが可能となっている。これは、同一の最大燃焼負荷の管状火炎バーナであれば、バーナ形状をより小さく設計することが可能であることを示している。   More specifically, in this embodiment, a tubular flame burner (inner tubular flame burner) is newly utilized by utilizing a portion inside the tubular flame 3 of the tubular flame burner (outer tubular flame burner) 11 that has not been effectively used for conventional combustion. Since the flame burner 12 is installed, the maximum combustion load can be improved without greatly changing the outer shape of the burner. This indicates that the shape of the burner can be designed smaller if it is a tubular flame burner having the same maximum combustion load.

また、内側管状火炎バーナ１２が外側管状火炎バーナ１１の輻射熱により加熱され、蓄熱することで、燃料ガスや燃焼用空気の急な変動に因る失火時にも着火用の熱を供給することができるため、すばやい再着火が可能となり、失火による爆発危険性を大幅に低減できる。内側管状火炎バーナ１２の火炎４は内側管（内側管状火炎バーナ本体）２によって保護されており、外部管状火炎バーナ１１の圧力変動の影響を受けること無く燃焼が可能である。また、外側管状火炎バーナ１１は、外側管（外側管状火炎バーナ本体）１と内側管（内側管状火炎バーナ本体）２の隙間がガス（燃料ガス、燃焼用空気、燃焼ガス）の通り道となり、ガス流れが制御されるため、安定した管状火炎の形成を実現することが可能である。   Further, the inner tubular flame burner 12 is heated by the radiant heat of the outer tubular flame burner 11 and accumulates heat, so that ignition heat can be supplied even in the event of a misfire due to a sudden change in fuel gas or combustion air. Therefore, quick reignition becomes possible, and the risk of explosion due to misfire can be greatly reduced. The flame 4 of the inner tubular flame burner 12 is protected by the inner tube (inner tubular flame burner main body) 2 and can be burned without being affected by the pressure fluctuation of the outer tubular flame burner 11. Further, in the outer tubular flame burner 11, the gap between the outer tube (outer tubular flame burner body) 1 and the inner tube (inner tubular flame burner body) 2 becomes a passage for gas (fuel gas, combustion air, combustion gas), and the gas Since the flow is controlled, it is possible to achieve the formation of a stable tubular flame.

なお、この実施形態においては、外側管状火炎バーナ１１と内側管状火炎バーナ１２の管軸を一致させているが、場合によっては、外側管状火炎バーナ１１と内側管状火炎バーナ１２の管軸が異なっていてもよい。すなわち、外側管状火炎バーナ１１の管状火炎３の内部に、内側管状火炎バーナ１２を設置するようにすればよい。   In this embodiment, the tube axes of the outer tubular flame burner 11 and the inner tubular flame burner 12 are made to coincide, but in some cases, the tube axes of the outer tubular flame burner 11 and the inner tubular flame burner 12 are different. May be. That is, the inner tubular flame burner 12 may be installed inside the tubular flame 3 of the outer tubular flame burner 11.

そして、本発明の多重管状火炎バーナは、二重管構造の二重管状火炎バーナに限らず、三重管構造の三重管状火炎バーナ、四重管構造の四重管状火炎バーナも可能であるが、構造が複雑となる上、最も内側の管の内径は非常に小さくなるため大幅な出力向上は望めないので、二重管構造（二重管状火炎バーナ）とするのが好ましい。   And the multiple tubular flame burner of the present invention is not limited to the double tubular flame burner having a double tube structure, but a triple tubular flame burner having a triple tube structure and a quadruple tubular flame burner having a quadruple tube structure are also possible. Since the structure is complicated and the inner diameter of the innermost tube is very small, a significant increase in output cannot be expected. Therefore, a double tube structure (double tube flame burner) is preferable.

本発明の実施例について述べる。   Examples of the present invention will be described.

（比較例）
比較例として、通常の管状火炎バーナを製作した。すなわち、内径１８０ｍｍ、長さ１４００ｍｍのＳＵＳ管（本体）の片側を閉じ、スリット状の燃焼ガス供給口と燃焼用空気供給口とを、燃焼用空気および燃料ガスが本体内面の接線方向に流れるように設置して、管状火炎バーナを製作した。 (Comparative example)
As a comparative example, a normal tubular flame burner was manufactured. That is, one side of a SUS pipe (main body) having an inner diameter of 180 mm and a length of 1400 mm is closed so that combustion air and fuel gas flow in a tangential direction of the inner surface of the main body through the slit-like combustion gas supply port and the combustion air supply port And installed a flame flame burner.

そして、この管状火炎バーナに、燃料ガス（希釈ＬＰＧ：発熱量２９５８ｋｃａｌ／Ｎｍ３）と燃焼用空気を表１に示す条件で供給し、電気プラグにて着火したところ、管状火炎を形成して燃焼し、管状火炎の燃焼がバーナ先端で終了していることが確認された。 Then, fuel gas (diluted LPG: calorific value 2958 kcal / Nm 3 ) and combustion air were supplied to the tubular flame burner under the conditions shown in Table 1, and ignited with an electric plug, forming a tubular flame and burning It was confirmed that the combustion of the tubular flame was completed at the burner tip.

（本発明例）
本発明例として、上述の本発明の一実施形態に基づいて、多重管状火炎バーナ（二重管状火炎バーナ）を製作した。すなわち、上記の比較例で製作した通常の管状火炎バーナと同様の管状火炎バーナを外側管状火炎バーナ(外側バーナ)とし、その内側に、管軸を一致させて、内径９０ｍｍの内側管状火炎バーナ(内側バーナ)を設置した。内側管状火炎バーナの長さは、燃料ガス供給口と燃焼用空気供給口の長さを考慮し、外側管状火炎バーナの長さ（１４００ｍｍ）に２００ｍｍ加え、１６００ｍｍとした。また、内側管状火炎バーナは外側管状火炎の輻射熱に耐えられるように、セラミック製とした。 (Example of the present invention)
As an example of the present invention, a multiple tubular flame burner (double tubular flame burner) was manufactured based on the above-described embodiment of the present invention. That is, a tubular flame burner similar to the normal tubular flame burner manufactured in the above comparative example is an outer tubular flame burner (outer burner), and an inner tubular flame burner with an inner diameter of 90 mm (with an inner axis of the tube axis aligned) An inner burner was installed. The length of the inner tubular flame burner was set to 1600 mm by adding 200 mm to the length (1400 mm) of the outer tubular flame burner in consideration of the lengths of the fuel gas supply port and the combustion air supply port. The inner tubular flame burner was made of ceramic so that it could withstand the radiant heat of the outer tubular flame.

そして、まず、内側管状火炎バーナに、燃料ガス（希釈ＬＰＧ：発熱量２９５８ｋｃａｌ／Ｎｍ３）と燃焼用空気を表１に示す条件で供給し、電気プラグにて着火したところ、管状火炎を形成して燃焼することが確認できた。そのまま約１０分間安定燃焼を確認した後、外側管状火炎バーナに、燃料ガス（希釈ＬＰＧ：発熱量２９５８ｋｃａｌ／Ｎｍ３）と燃焼用空気を表１に示す条件で送ったところ、蓄熱した内側管状火炎バーナによって着火し、管状火炎を形成して燃焼することが確認された。 First, fuel gas (diluted LPG: calorific value 2958 kcal / Nm 3 ) and combustion air were supplied to the inner tubular flame burner under the conditions shown in Table 1, and when ignited with an electric plug, a tubular flame was formed. It was confirmed that it burned. After confirming stable combustion for about 10 minutes as it was, fuel gas (diluted LPG: calorific value 2958 kcal / Nm 3 ) and combustion air were sent to the outer tubular flame burner under the conditions shown in Table 1. It was confirmed that it was ignited by a burner to form a tubular flame and burned.

これらの比較例（通常の管状火炎バーナ）と本発明例（二重管状火炎バーナ）の最大燃焼負荷を比較すると、表１に示すように、比較例では１２０ｋＷであるのに対して、本発明例では１８０ｋＷであり、比較例の１．５倍になった。   When the maximum combustion load of these comparative examples (normal tubular flame burner) and the present invention example (double tubular flame burner) is compared, as shown in Table 1, the comparative example is 120 kW, whereas the present invention is In the example, it was 180 kW, which was 1.5 times that of the comparative example.

これによって、本発明の有効性が確認された。   This confirmed the effectiveness of the present invention.

Figure 2015183971
Figure 2015183971

１ 外側管状火炎バーナの本体
２ 内側管状火炎バーナの本体
３ 外側管状火炎バーナの管状火炎（外側管状火炎）
４ 内側管状火炎バーナの管状火炎（内側管状火炎）
５ 外側管状火炎バーナの燃料ガス供給口
６ 内側管状火炎バーナの燃料ガス供給口
７ 外側管状火炎バーナの燃焼用空気供給口
８ 内側管状火炎バーナの燃焼用空気供給口
１０ 多重管状火炎バーナ
１１ 外側管状火炎バーナ（通常の管状火炎バーナ）
１２ 内側管状火炎バーナ 1 Body of outer tubular flame burner 2 Body of inner tubular flame burner 3 Tubular flame of outer tubular flame burner (outer tubular flame)
4 Inner tubular flame Burner tubular flame (inner tubular flame)
5 Fuel gas supply port of outer tubular flame burner 6 Fuel gas supply port of inner tubular flame burner 7 Air supply port for combustion of outer tubular flame burner 8 Air supply port for combustion of inner tubular flame burner 10 Multiple tubular flame burner 11 Outer tube Flame burner (normal tubular flame burner)
12 Inner tubular flame burner

Claims (2)

円管の一方の端部を閉塞し、円管内面の接線方向に向けて燃料ガスと燃焼用空気を送り、旋回流を発生させて、燃料ガスを燃焼する管状火炎バーナにおいて、外側に設置された外側管状火炎バーナと、該外側管状火炎バーナの内部に設置された内側管状火炎バーナとを備えていることを特徴とする多重管状火炎バーナ。   A tubular flame burner that closes one end of the circular tube, sends fuel gas and combustion air toward the tangential direction of the inner surface of the circular tube, generates a swirling flow, and burns the fuel gas. A multi-tubular flame burner comprising an outer tubular flame burner and an inner tubular flame burner installed inside the outer tubular flame burner. 前記内側管状火炎バーナにおける旋回流の旋回方向と、前記外側管状火炎バーナにおける旋回流の旋回方向とが同一方向であることを特徴とする請求項１に記載の多重管状火炎バーナ。   The multiple tubular flame burner according to claim 1, wherein the swirling direction of the swirling flow in the inner tubular flame burner and the swirling direction of the swirling flow in the outer tubular flame burner are the same direction.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107575865A (en) * 2017-09-25 2018-01-12 中国科学院广州能源研究所 A kind of Swirl tube flame burner of low-heat loss

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61260865A (en) * 1985-05-15 1986-11-19 Miki Sangyo Kk Food dryer
JP2004093115A (en) * 2002-08-15 2004-03-25 Jfe Steel Kk Multi-stage tubular flame burner and its combustion control method
JP2005188775A (en) * 2003-12-24 2005-07-14 Jfe Steel Kk Tubular flame burner
JP2006125758A (en) * 2004-10-29 2006-05-18 Jfe Steel Kk Tubular object heating device
JP2006250387A (en) * 2005-03-09 2006-09-21 Jfe Steel Kk Incineration equipment for incombustible liquid
JP2013079734A (en) * 2011-09-30 2013-05-02 Jfe Steel Corp Tubular flame burner

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61260865A (en) * 1985-05-15 1986-11-19 Miki Sangyo Kk Food dryer
JP2004093115A (en) * 2002-08-15 2004-03-25 Jfe Steel Kk Multi-stage tubular flame burner and its combustion control method
JP2005188775A (en) * 2003-12-24 2005-07-14 Jfe Steel Kk Tubular flame burner
JP2006125758A (en) * 2004-10-29 2006-05-18 Jfe Steel Kk Tubular object heating device
JP2006250387A (en) * 2005-03-09 2006-09-21 Jfe Steel Kk Incineration equipment for incombustible liquid
JP2013079734A (en) * 2011-09-30 2013-05-02 Jfe Steel Corp Tubular flame burner

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107575865A (en) * 2017-09-25 2018-01-12 中国科学院广州能源研究所 A kind of Swirl tube flame burner of low-heat loss

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