JPH0619219B2 - Surface burning burner - Google Patents
Surface burning burnerInfo
- Publication number
- JPH0619219B2 JPH0619219B2 JP61051234A JP5123486A JPH0619219B2 JP H0619219 B2 JPH0619219 B2 JP H0619219B2 JP 61051234 A JP61051234 A JP 61051234A JP 5123486 A JP5123486 A JP 5123486A JP H0619219 B2 JPH0619219 B2 JP H0619219B2
- Authority
- JP
- Japan
- Prior art keywords
- mixed gas
- combustion
- burner
- gas flow
- insulating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Description
【発明の詳細な説明】Detailed Description of the Invention
本発明は、表面燃焼バーナの改良に関し、より詳しく
は、表面燃焼バーナにおける、燃焼性能に深く関連する
助燃体の改良、並びに着火用、或は炎検出用等の電極の
取付構造の改良に関するものである。The present invention relates to an improvement in a surface combustion burner, and more particularly, to an improvement in an auxiliary combustor that is deeply related to combustion performance in the surface combustion burner, and an improvement in an electrode attachment structure for ignition or flame detection. Is.
従来、表面燃焼バーナには、一般にセラミック等の耐熱
性粒子を特殊結合剤にて固めた助燃体が使用されてい
る。 この種の助燃体では、不規則に変化する粒子間隙間によ
って、燃料ガスと空気の混合促進化、並びに、ガス流れ
の均一化が行われ、助燃体表面において良好な青炎が得
られるという利点がある。 また、以上のような構造であるため、被加熱物の形状に
応じた種々の形態の表面燃焼バーナが得られるという利
点がある。Conventionally, a surface combustion burner has generally used an auxiliary combustor in which heat resistant particles such as ceramics are hardened with a special binder. In this type of burner, the irregularly changing interparticle gap promotes the mixing of fuel gas and air, and the gas flow is made uniform, and a good blue flame is obtained on the burner surface. There is. Further, because of the structure as described above, there is an advantage that various types of surface combustion burners can be obtained according to the shape of the object to be heated.
しかし、このような表面燃焼バーナにおいては、燃焼時
において助燃体の燃焼側表面は、８００℃以上の高温に
加熱され、熱変化により亀裂損傷の危険が有り、そのた
めに特殊な材料を必要があって高価であった。 また製造時の取扱いにおいても落下・衝撃等により破損
しやすいといった問題もあった。 しかも、表面燃焼バーナの着火手段あるいは、炎検出手
段としては、一般に助燃体の外周炎にスパークロッドあ
るいは、フレームロッドを助燃体外側に近接して設ける
方法が採用されているが、このような取付構造では、バ
ーナのスペースが大きくなる上、被加熱物への取付けが
複雑で製造工数が多くコスト高となり、しかも、スパー
クロッドあるいは、フレームロッドの位置決めに特殊な
技術を要し、安定した品質を得ることが困難であるとい
った問題もあった。 即ち、この発明が解決しようとする課題は、コンパクト
化、並びに、低コスト化を達成することであって、しか
も、燃焼性能の高い、品質の優れた表面燃焼バーナを提
供することである。However, in such a surface combustion burner, the combustion side surface of the auxiliary burner is heated to a high temperature of 800 ° C. or higher during combustion, and there is a risk of crack damage due to thermal change. Therefore, a special material is required. Was expensive. In addition, there is a problem that even during handling during manufacturing, it is easily damaged by a drop or impact. Moreover, as the ignition means or flame detection means of the surface combustion burner, a method in which a spark rod or a frame rod is provided close to the outside of the auxiliary combustion body is generally adopted in the outer peripheral flame of the auxiliary combustion body. With the structure, the burner space is large, the installation on the object to be heated is complicated, the number of manufacturing steps is high, and the cost is high. Moreover, a special technique is required for positioning the spark rod or the frame rod, and stable quality is achieved. There was also a problem that it was difficult to obtain. That is, the problem to be solved by the present invention is to achieve compactness and cost reduction, and to provide a surface combustion burner having high combustion performance and excellent quality.
本考案は上記課題を達成するためになされたものであっ
て、空気と燃料ガスの混合ガスが供給される筒状のケー
シング部材の内部に、電気的絶縁性を有する絶縁管を略
同軸状に配置し、上記ケーシング部材と絶縁管との間に
形成される環状の空間に、導電性を有する多数の導電管
を緊密に配置して助燃体を形成し、上記助燃体の混合ガ
ス下流側の端面を燃焼表面として形成し、電極棒を上記
絶縁管内に挿入配置し、上記電極棒の先端を上記燃焼表
面に近接させて配置することによって、電極棒の先端と
導電管群との間に一対の電極対を構成したことを特徴と
する。The present invention has been made in order to achieve the above-mentioned object, and an insulating tube having electrical insulation is provided substantially coaxially inside a cylindrical casing member to which a mixed gas of air and fuel gas is supplied. Arranged, in the annular space formed between the casing member and the insulating pipe, to form a combustor by closely disposing a large number of conductive tubes having conductivity, on the downstream side of the mixed gas of the combustor. The end surface is formed as a combustion surface, the electrode rod is inserted and arranged in the insulating tube, and the tip of the electrode rod is arranged close to the combustion surface, so that a pair is formed between the tip of the electrode rod and the conductive tube group. It is characterized in that the electrode pair is constructed.
以下、本発明を図面に示した実施例に基づいて説明す
る。 第１図は、本発明に係る表面燃焼バーナの一実施例を示
す縦断側面図、第２図は、第１図のII−II断面図であ
る。 図面において、この発明に係る予混合バーナは、混合ガ
スの供給流路である円筒状のケーシング部材(3) と、こ
のケーシング部材(3) の先端側内部に略同軸状に配置さ
れた絶縁間(1) と、上記ケーシング部材(3) と絶縁性管
(1) との間の環状の空間に緊密に配置した多数の導電管
(2) と、上記絶縁管(1) 内に挿入配置した電極棒(5) と
からなる。 上記ケーシング部材(3) は、円筒状をなし、その上流側
の側面には、空気と燃料とからなる混合ガスの流入口
(6) を形成してある。 上記絶縁管(1) は、例えば、円筒状のセラミック製、陶
器製等の電気的絶縁性を有する材料から形成した碍子等
が用いられ、上記導電管(2) は、例えば、銅管、鋼管等
の導電性材料から形成した管状部材が用いられる。 上記導電管(2) は、上記ケーシング部材(3) と絶縁部材
(1) との間に形成される環状の空間に、互いに当接する
緊密状態で、かつ、各導電管(2) の軸線がケーシング部
材(3) と略平行状態で、多数本が配置される。 この状態では、上記のケーシング部材(3) の先端内部に
は、絶縁管(1) と導電部(2) とが配置された状態にあ
り、これら絶縁管(1) ，導電管(2) 等によって燃焼助燃
体(9) が形成される。 この助燃体(9) において、上記導電管(2) の内部と絶縁
管(1) 内部が円形状の主混合ガス流路(7) として機能
し、また、導電管(2) と絶縁管(1) 外表面及びケーシン
グ部材(3) 間が三角形状の副混合ガス流路(8) として機
能し、各流路(7),(8) の下流端面が燃焼表面(4) とな
る。 尚、上記の電極棒(5) は、この実施例では、点火装置の
点火用電極（スパークロッド）としての電極棒であっ
て、ケーシング部材(3) 上流端面から絶縁管(1) 内を貫
通するように挿入配置される。そして、電極棒(5) の先
端は、絶縁管(1) の周りに環状に配された導電管(2) 群
との間で一対の電極対を構成する。 尚、各導電管(2) 及び絶縁管(1) の断面積と長さは、ケ
ーシング部材(3) から流入する混合ガスの渦硫を適度の
大きさにまで消去し得る寸法であって、設計時点の混合
ガスの流速、入口の渦流の大きさに応じて決定される。
また、電極棒(5) と導電管(2) 群の先端は、一対の電極
を構成するように絶縁管(1) 上端よりも混合ガスの流れ
方向下流側に向けて僅かに突出させてある。 上記の構成においてその作用を説明する。 まず、混合ガス流入口(6) からケーシング部材(3) 内に
流入した混合ガスは、ケーシング部材(3) 内を助燃体
(9) に向けて流れ、導電管(2) ・絶縁管(1) 等で構成さ
れる主・副混合ガス流路(7),(8) に均等に流入する。 該主・副混合ガス流路(7),(8) では、導電管(2) 等の働
きにより混合ガスの渦流が消去され、流路下流側では、
極微細な渦流を伴う均一な流れが形成され、各主・副混
合ガス流路(7),(8) から流出する。 一方、混合ガスの助燃体(9) への流入と同時に、或は先
立って、電極棒(5) と導電管(2) 群間に電圧を印加して
おく。この電圧印加により、電極棒(5) と導電管(2) と
の先端管間にスパークが発生し、主・副混合ガス流路
(7),(8) から流出した混合ガスに吸引し、主・副混合ガ
ス流路(7),(8) の流出端面、即ち、助燃体(9) の燃焼表
面(4) において良好な青炎が形成される。このとき、電
極棒(5) と導電管(2) 群の先端間は、電気的絶縁性を有
する絶縁管(1) にて隔離されているので、両者先端間に
おいてのみ良好な一対の電極が形成され、スパーク・着
火がスムーズに行われる。 ここで、上記の主混合ガス流路(7) は、副混合ガス流路
(8) に比べ、その流路断面積は顕著に大きく形成されて
いる。 このように各混合ガス流路(7),(8) の流路断面積を異に
することにより、各流路(7),(8) を流れる混合ガスには
管路摩擦の影響により流速の差を生じ、主混合ガス流路
(7) は高速ガス流れ、副混合ガス流路(8) は低速ガス流
れとなり、主混合ガス流路(7) の下流端に主炎に形成さ
れ、副混合ガス流路(8) の下流端に袖火として機能する
副炎が形成される。 上記主混合ガス流路(7) 内の混合ガス流は高速であるた
め、燃焼速度とガス流速のバランスがくずれると炎のリ
フティング現象を生じようとするが、主混合ガス流路
(1) に隣接する低流速の副混合ガス流路(8) が存在し、
その下流端に燃焼速度とガス流速のバランスした安定な
副炎を形成するので、主炎の安定化が図られ、全体とし
ての火炎の安定化が達成される。 一方、主混合ガス流路(1) となる絶縁管(1) 、並びに導
電管(2) は高速の混合ガス流で冷却されるので助燃体
(9) 全体の温度上昇が抑えられるため、絶縁管(1) 、導
電管(2) はそれほどの高温度とはならず、銅・ガラス等
の一般材料の使用が可能である。 また、ケーシング部材(3) の混合ガス流れ方向下流側の
端面を、導電管(2) 群の端面より僅かに上記流れ方向の
下流側に突出させると、保炎効果を更に向上することが
できる。 尚、以上の実施例では、電極棒(5) を、着火装置の点火
用電極（スパークロッド）として構成した場合について
説明したが、この発明においては、これに限定するわけ
ではなく、電極棒(5) を炎検出装置としての火炎検出用
電極（フレームロッド）とし、電極棒(5) と導電管(2)
群の先端間に火検出用の電極を形成することもできる。 また、上記の実施例では、ケーシング部材(3) と絶縁管
(1) との間の環状空間に。導電管(2) を一重に環状配置
した場合を示しているが、この場合も、これに限定され
ず、導電管(2) を複数列配置しても同様の効果が得られ
るのは、勿論のことである。Hereinafter, the present invention will be described based on the embodiments shown in the drawings. FIG. 1 is a vertical sectional side view showing an embodiment of a surface combustion burner according to the present invention, and FIG. 2 is a II-II sectional view of FIG. In the drawings, a premixing burner according to the present invention comprises a cylindrical casing member (3) which is a mixed gas supply flow path, and an insulating space which is arranged substantially coaxially inside the front end side of the casing member (3). (1), the casing member (3) and the insulating pipe
A large number of conductive tubes closely arranged in the annular space between (1) and
(2) and the electrode rod (5) inserted and arranged in the insulating tube (1). The casing member (3) has a cylindrical shape, and an upstream side surface of the casing member (3) has an inlet for a mixed gas composed of air and fuel.
(6) is formed. The insulating tube (1) is, for example, an insulator or the like formed from a material having an electrically insulating property such as a cylindrical ceramic or ceramics, and the conductive tube (2) is, for example, a copper tube or a steel tube. A tubular member formed of a conductive material such as is used. The conductive tube (2) is separated from the casing member (3) by an insulating member.
A large number of them are arranged in an annular space formed between (1) and (1) in a close contact state with each other and the axis of each conductive tube (2) is substantially parallel to the casing member (3). . In this state, the insulating pipe (1) and the conductive portion (2) are arranged inside the tip of the casing member (3), and the insulating pipe (1), the conductive pipe (2), etc. This forms a combustion supporter (9). In this auxiliary burner (9), the inside of the conductive tube (2) and the insulating tube (1) function as a circular main mixed gas flow path (7), and the conductive tube (2) and the insulating tube (1) 1) The outer surface and the casing member (3) function as a triangular sub-mixed gas flow path (8), and the downstream end faces of the flow paths (7) and (8) become the combustion surface (4). The electrode rod (5) described above is an electrode rod as an ignition electrode (spark rod) of the ignition device in this embodiment, and penetrates the inside of the insulating pipe (1) from the upstream end face of the casing member (3). It is inserted and arranged as follows. The tip of the electrode rod (5) forms a pair of electrodes with the group of conductive tubes (2) annularly arranged around the insulating tube (1). The cross-sectional area and length of each conductive tube (2) and insulating tube (1) are such that the eddy sulfur of the mixed gas flowing from the casing member (3) can be eliminated to an appropriate size. It is determined according to the flow velocity of the mixed gas at the time of design and the size of the vortex flow at the inlet.
Further, the tip of the electrode rod (5) and the conductive tube (2) group is slightly projected toward the downstream side in the flow direction of the mixed gas from the upper end of the insulating tube (1) so as to form a pair of electrodes. . The operation of the above configuration will be described. First, the mixed gas flowing into the casing member (3) from the mixed gas inlet (6) flows inside the casing member (3) as an auxiliary burner.
It flows toward (9) and evenly flows into the main / sub mixed gas flow paths (7), (8) composed of the conductive tube (2) and the insulating tube (1). In the main / sub-mixed gas flow paths (7) and (8), the eddy current of the mixed gas is eliminated by the action of the conductive tube (2) and the like.
A uniform flow with an extremely fine vortex is formed and flows out from each main / sub-mixed gas flow path (7), (8). On the other hand, a voltage is applied between the electrode rod (5) and the conductive tube (2) group at the same time as or prior to the inflow of the mixed gas into the auxiliary burner (9). By applying this voltage, a spark is generated between the tip tubes of the electrode rod (5) and the conductive tube (2), and the main / sub mixed gas flow path
It is sucked into the mixed gas flowing out from (7) and (8), and it is good at the outflow end face of the main / sub mixed gas flow paths (7) and (8), that is, the combustion surface (4) of the auxiliary burner (9) A blue flame is formed. At this time, since the electrode rod (5) and the tip of the conductive tube (2) group are separated by the insulating tube (1) having an electrically insulating property, a good pair of electrodes is provided only between the two tips. It is formed and sparks and ignition are performed smoothly. Here, the main mixed gas passage (7) is a sub mixed gas passage.
Compared to (8), the cross-sectional area of the flow channel is significantly larger. By making the mixed gas flow passages (7) and (8) have different flow passage cross-sectional areas, the mixed gas flowing through the flow passages (7) and (8) will have a flow velocity due to the effect of pipe friction. The main mixed gas flow path
(7) becomes a high-speed gas flow, sub-mixed gas flow path (8) becomes a low-speed gas flow, and a main flame is formed at the downstream end of the main mixed-gas flow path (7), which is downstream of the sub-mixed gas flow path (8). A secondary flame is formed at the end that acts as sleeve fire. Since the mixed gas flow in the main mixed gas flow path (7) is high speed, if the combustion speed and the gas flow velocity are out of balance, a flame lifting phenomenon will occur.
There is a low velocity submixed gas flow path (8) adjacent to (1),
Since a stable secondary flame in which the combustion velocity and the gas flow velocity are balanced is formed at the downstream end thereof, the main flame is stabilized and the flame as a whole is stabilized. On the other hand, the insulating pipe (1), which will be the main mixed gas flow path (1), and the conductive pipe (2) are cooled by the high-speed mixed gas flow, so the auxiliary burner
(9) Since the temperature rise of the whole is suppressed, the insulating pipe (1) and the conductive pipe (2) do not reach such a high temperature, and general materials such as copper and glass can be used. Further, when the end surface of the casing member (3) on the downstream side in the flow direction of the mixed gas is made to project slightly to the downstream side in the above flow direction from the end surface of the conductive tube (2) group, the flame holding effect can be further improved. . In the above embodiments, the case where the electrode rod (5) is configured as the ignition electrode (spark rod) of the ignition device has been described, but the present invention is not limited to this, and the electrode rod ( 5) is the flame detection electrode (frame rod) as a flame detection device, and the electrode rod (5) and conductive tube (2)
It is also possible to form a fire detection electrode between the tips of the groups. In the above embodiment, the casing member (3) and the insulating pipe
In the annular space between (1) and. The case where the conductive tubes (2) are arranged in a single annular shape is shown, but in this case as well, the same effect can be obtained by arranging the conductive tubes (2) in a plurality of rows. That is.
【発明の効果】 本発明にかかる表面燃焼バーナは、上述のように構成さ
れているので、次のような効果が得られる。 1) 絶縁管、導電管等で構成される助燃体は、混合ガス
流路自体に混合ガス流れに対しての整流効果を発揮し、
燃焼速度と混合ガス流速のバランスを取ることが容易で
安定した燃焼が可能である。 2) 特に導電管と絶縁管・ケーシング部材間に主混合ガ
ス流路と副混合ガス流路とが互いに接する状態で形成さ
れているので、保炎効果の優れた良好な表面燃焼炎が得
られる。 3) 導電管自体が内部を流通する混合ガスで冷却される
ので特殊な耐熱材料を用いる必要が無く、安価なバーナ
とすることができる。 4) 混合ガス流路を構成する絶縁管内に電極棒を挿入し
た構成であるのでスペース効率の高い、コンパクトな表
面燃焼バーナとすることができる。 5) 電極棒とバーナとを一体構造とすることにより、製
造コストが低減し、取扱いが容易となり、更に低コスト
のバーナとすることができる。 6) 電極棒の対極となる導電管は、円環状に配列されて
いるので電極棒先端が位置ずれを起こしても電極棒と導
電管には常に良好な一対の電極が構成され安定した品質
のバーナが得られ、この点からもバーナの製造が容易と
なる。EFFECTS OF THE INVENTION Since the surface combustion burner according to the present invention is configured as described above, the following effects can be obtained. 1) The auxiliary burner composed of an insulating tube, a conductive tube, etc. exerts a rectifying effect on the mixed gas flow in the mixed gas flow path itself.
It is easy to balance the combustion speed and the mixed gas flow rate, and stable combustion is possible. 2) Especially, since the main mixed gas flow path and the sub mixed gas flow path are formed in contact with each other between the conductive tube and the insulating tube / casing member, a good surface combustion flame with excellent flame holding effect can be obtained. . 3) Since the conductive tube itself is cooled by the mixed gas flowing inside, it is not necessary to use a special heat-resistant material, and an inexpensive burner can be obtained. 4) Since the electrode rod is inserted into the insulating tube that constitutes the mixed gas flow path, a compact surface combustion burner with high space efficiency can be obtained. 5) By integrally forming the electrode rod and the burner, the manufacturing cost can be reduced, the handling can be facilitated, and the burner can have a lower cost. 6) Since the conductive tube that is the counter electrode of the electrode rod is arranged in a ring shape, even if the tip of the electrode rod is displaced, a good pair of electrodes is always constructed on the electrode rod and the conductive tube to ensure stable quality. A burner is obtained, and the burner can be easily manufactured in this respect as well.
第１図は、本発明に係る表面燃焼バーナーの一実施例を
示す縦断側面図、第２図は、第１図のII−II線断面図で
ある。 (1)……絶縁管 (2)……導電管 (3)……ケーシング部材 (4)……燃焼表面 (5)……電極棒 (6)……混合ガス流入口 (7)……主混合ガス流路 (8)……副混合ガス流路 (9)……助燃体FIG. 1 is a vertical sectional side view showing an embodiment of a surface combustion burner according to the present invention, and FIG. 2 is a sectional view taken along line II-II of FIG. (1) …… Insulation pipe (2) …… Conductive pipe (3) …… Casing member (4) …… Combustion surface (5) …… Electrode rod (6) …… Mixed gas inlet (7) …… Main Mixed gas flow path (8) …… Sub-mixed gas flow path (9) …… Auxiliary combustor
Claims (1)
状のケーシング部材(3) の内部に、電気的絶縁性を有す
る絶縁管(1) を略同軸状に配置し、 上記ケーシング部材(3) と絶縁管(1) との間に形成され
る環状の空間に、導電性を有する多数の導電管(2) を緊
密に配置して助燃体(9) を形成し、 上記助燃体(9) の混合ガス下流側の端面を燃焼表面(4)
として形成し、 電極棒(5) を上記絶縁管(1) 内に挿入配置し、上記電極
棒(5) の先端を上記燃焼表面(4) に近接させて配置する
ことによって、電極棒(5) の先端と導電管(2) 群との間
に一対の電極対を構成したことを特徴とする表面燃焼バ
ーナ。1. An insulating pipe (1) having an electrically insulating property is disposed substantially coaxially inside a cylindrical casing member (3) to which a mixed gas of air and fuel gas is supplied. A large number of electrically conductive tubes (2) are closely arranged in an annular space formed between the (3) and the insulating tube (1) to form an auxiliary burner (9). Combustion surface (4) on the end face of the mixed gas downstream of (9)
The electrode rod (5) is inserted into the insulating tube (1) and the tip of the electrode rod (5) is placed close to the combustion surface (4). ) And a group of conductive tubes (2), a pair of electrode pairs is formed between them, and the surface combustion burner is characterized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61051234A JPH0619219B2 (en) | 1986-03-07 | 1986-03-07 | Surface burning burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61051234A JPH0619219B2 (en) | 1986-03-07 | 1986-03-07 | Surface burning burner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62210313A JPS62210313A (en) | 1987-09-16 |
| JPH0619219B2 true JPH0619219B2 (en) | 1994-03-16 |
Family
ID=12881254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61051234A Expired - Lifetime JPH0619219B2 (en) | 1986-03-07 | 1986-03-07 | Surface burning burner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0619219B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5022849A (en) * | 1988-07-18 | 1991-06-11 | Hitachi, Ltd. | Low NOx burning method and low NOx burner apparatus |
| US5149648A (en) * | 1989-03-16 | 1992-09-22 | Kabushiki Kaisha Kobe Seiko Sho | Enzymes employed for producing pulps |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5652126U (en) * | 1979-09-27 | 1981-05-08 |
-
1986
- 1986-03-07 JP JP61051234A patent/JPH0619219B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62210313A (en) | 1987-09-16 |
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