JPH06201110A - Premixing burner device - Google Patents
Premixing burner deviceInfo
- Publication number
- JPH06201110A JPH06201110A JP34797392A JP34797392A JPH06201110A JP H06201110 A JPH06201110 A JP H06201110A JP 34797392 A JP34797392 A JP 34797392A JP 34797392 A JP34797392 A JP 34797392A JP H06201110 A JPH06201110 A JP H06201110A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- gas chamber
- flame
- holding surface
- burner
- 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.)
- Granted
Links
Landscapes
- Gas Burners (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は予混合バーナ装置に関す
るものである。FIELD OF THE INVENTION The present invention relates to a premix burner system.
【０００２】[0002]
【従来の技術】従来の予混合バーナ装置の予混合方式の
代表例は、ベンチュリーミキサを使用して空気の噴出エ
ネルギによってガスを吸引し、混合管内で良好な混合を
得た後、バーナに於いて燃焼させる構成である。2. Description of the Related Art A typical example of a premixing system of a conventional premixing burner apparatus is to use a venturi mixer to suck gas by jetting energy of air to obtain good mixing in a mixing tube and then to use the burner. It is configured to burn.
【０００３】[0003]
【解決すべき課題】前記従来例は、次の課題を有してい
る。即ち混合距離が必然的に長くなり、可燃混合容積
が大きくなり、逆火の場合、非常に危険である。高い
ガス圧力を必要とし、且つ空気圧損が大きく、大容量化
が困難である。ＮＯｘ排出濃度が空気比によって大き
く変動し、低ＮＯｘのための燃焼調整に於いて難点があ
る。Problems to be Solved The above conventional example has the following problems. That is, the mixing distance is inevitably long, the combustible mixing volume is large, and in the case of flashback, it is extremely dangerous. High gas pressure is required, and air pressure loss is large, making it difficult to increase the capacity. The NOx emission concentration fluctuates greatly depending on the air ratio, and there is a difficulty in combustion adjustment for low NOx.
【０００４】[0004]
【課題を解決すべき手段】前記課題を解決するために、
本発明は、先端に保炎面を有するバーナ筒内に、該保炎
面から距離を設定してガス室を設け、該ガス室はガス管
と接続すると共に前記ガス室の周端部と前記バーナ筒の
内壁との間には空気流通スリット部を設け、前記ガス室
の周端部には半径方向に開口した半径方向ガス噴出孔を
設けたことを特徴とするものである。また、本発明は先
端に保炎面を有するバーナ筒内に、該保炎面から距離を
設定してガス室を設け、該ガス室はガス管と接続すると
共に前記ガス室と前記バーナ筒の内壁との間には空気流
通スリット部を設け、前記ガス室には前記保炎面方向に
向けて開口した保炎面方向ガス噴出孔を形成したことを
特徴とするものである。 更に、本発明は、ガス室から
保炎面までの距離Ｌを、バーナ筒の直径口との関係に於
いて、Ｌ／Ｄ＝０．２５以下としたことを特徴とするも
のである。[Means for Solving the Problems] In order to solve the above problems,
According to the present invention, a gas chamber is provided in a burner cylinder having a flame holding surface at its tip at a distance from the flame holding surface, the gas chamber is connected to a gas pipe, and the peripheral end of the gas chamber and the An air circulation slit is provided between the inner wall of the burner cylinder and a radial gas ejection hole that opens in the radial direction at the peripheral end of the gas chamber. Further, according to the present invention, a gas chamber is provided in a burner cylinder having a flame-holding surface at its tip at a distance from the flame-holding surface, the gas chamber is connected to a gas pipe, and the gas chamber and the burner cylinder are connected. An air circulating slit portion is provided between the inner wall and the gas chamber, and a flame-holding surface direction gas ejection hole that opens toward the flame-holding surface direction is formed in the gas chamber. Furthermore, the present invention is characterized in that the distance L from the gas chamber to the flame holding surface is set to L / D = 0.25 or less in relation to the diameter opening of the burner cylinder.
【０００５】[0005]
【作用】ガス室に設けた半径方向ガス噴出孔からガスが
噴出すると、空気流通スリット部を流れる空気と鉛直状
態で衝突し、混合しながら直進するが、その一部はガス
室の下流側で負圧による渦流を形成する。この渦流は連
続的に前記混合気を巻き込み、即ち伴流して混合状態を
一層良好に促進する。かかる際、空気室と保炎面との距
離ｌを、バーナ筒との直径（Ｄ）との関係に於いて、Ｌ
／Ｄ＝０．２５以下とすることが大切である。即ち、図
２に示すように、Ｌ／Ｄ＝０．２５以上とすると、つま
り、前記距離を長くすると、Ｏ2％が変化した時（季節
によって変化する場合がある）、ＮＯｘも大きく変化し
てしまうが、Ｌ／Ｄ＝０．２５以下とすることによっ
て、ＮＯｘ値を安定的に、空気比によらずに、低減させ
ることができる。かかる際、同時に保炎面方向ガス噴出
孔から、ガスを噴出させると、前記渦流によってガスが
伴流されて混合するので、ガス圧を低減することがで
き、装置のコストダウンを図かることができる。When the gas is ejected from the radial gas ejection holes provided in the gas chamber, the gas collides with the air flowing through the air flow slit portion in a vertical state and proceeds straight while mixing, but a part of the gas is downstream of the gas chamber. Form a vortex flow due to negative pressure. This vortex flow continuously entrains the air-fuel mixture, i.e., wakes it to further promote the mixed state. At this time, the distance 1 between the air chamber and the flame holding surface is expressed as L in relation to the diameter (D) with the burner cylinder.
It is important to set /D=0.25 or less. That is, as shown in FIG. 2, when L / D = 0.25 or more, that is, when the distance is increased, NOx also greatly changes when O 2 % changes (may change depending on the season). However, by setting L / D = 0.25 or less, the NOx value can be stably reduced regardless of the air ratio. At this time, at the same time, when the gas is ejected from the flame stabilizing surface direction gas ejection holes, the gas is accompanied by the vortex flow and mixed, so that the gas pressure can be reduced and the cost of the device can be reduced. it can.
【０００６】[0006]
【実施例】符号１はバーナ筒であって、このバーナ筒１
は、円筒であっても、角筒であってもよい。このバーナ
筒１の先端部には保炎面２を有する。該保炎面２は、セ
ラミックス多孔体、金属多孔体、金属繊維マット等通気
性のある材料を用い、可燃混合気を通過させ、保炎面２
に火炎３を形成する。前記バーナ筒１内に於いて、前記
保炎面２から距離をおいてガス室４を設け、該ガス室４
はガス管５と接続すると共に、前記ガス室４と前記バー
ナ筒１の内壁との間には空気流通スリット部６を設け、
前記ガス室４の周端部には半径方向に開口した半径方向
ガス噴出孔７を設ける。また、８は前記ガス室４に形成
した保炎面方向ガス噴出孔である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference numeral 1 is a burner cylinder.
May be a cylinder or a rectangular tube. A flame holding surface 2 is provided at the tip of the burner cylinder 1. The flame holding surface 2 is made of a material having air permeability such as a ceramic porous body, a metal porous body, or a metal fiber mat, and a flammable air-fuel mixture is allowed to pass through the flame holding surface 2
Flame 3 is formed. In the burner cylinder 1, a gas chamber 4 is provided at a distance from the flame holding surface 2, and the gas chamber 4 is provided.
Is connected to the gas pipe 5, and an air circulation slit portion 6 is provided between the gas chamber 4 and the inner wall of the burner cylinder 1.
Radial gas ejection holes 7 are formed at the peripheral end of the gas chamber 4 and open in the radial direction. Reference numeral 8 is a flame-holding surface direction gas ejection hole formed in the gas chamber 4.
【０００７】かかる構成に於いて、ガス室４に設けた半
径方向ガス噴出孔７からガスが噴出すると、空気流通ス
リット部６を流れる空気と鉛直状態で衝突し、混合しな
がら直進するが、その一部はガス室４の下流側で負圧に
よる渦流９を形成する。この渦流９は連続的に前記混合
気を巻き込み、即ち伴流して混合状態を一層良好に促進
する。かかる際、ガス室４と保炎面２との距離（Ｌ）
を、バーナ筒１との直径（Ｄ）との関係に於いて、Ｌ／
Ｄ＝０．２５以下とすることが大切である。即ち、図３
に示すように、Ｌ／Ｄ＝０．２５以上とすると、つま
り、前記距離を長くすると、Ｏ2％が変化した時（季節
によって変化する場合がある）、ＮＯｘも大きく変化し
てしまうが、Ｌ／Ｄ＝０．２５以下とすることによっ
て、ＮＯｘ値を安定的に、空気比によらずに、低減させ
ることができる。かかる際、同時に保炎面方向ガス噴出
孔８から、ガスを噴出させると、前記渦流９によってガ
スが伴流されて混合するので、ガス圧を低減することが
でき、装置のコストダウンを図かることができる。In such a structure, when gas is ejected from the radial gas ejection holes 7 provided in the gas chamber 4, the gas collides with the air flowing through the air flow slit portion 6 in a vertical state, and goes straight while mixing. A part of the gas forms a vortex 9 due to negative pressure on the downstream side of the gas chamber 4. This vortex 9 continuously entrains the air-fuel mixture, that is, wakes it to further promote the mixed state. At this time, the distance (L) between the gas chamber 4 and the flame holding surface 2
In relation to the diameter (D) with the burner cylinder 1, L /
It is important to set D = 0.25 or less. That is, FIG.
As shown in, when L / D = 0.25 or more, that is, when the distance is increased, NOx also greatly changes when O 2 % changes (may change depending on the season). By setting L / D = 0.25 or less, the NOx value can be stably reduced regardless of the air ratio. At this time, at the same time, when the gas is ejected from the flame stabilizing surface direction gas ejection hole 8, the gas is accompanied by the vortex 9 and mixed, so that the gas pressure can be reduced and the cost of the apparatus can be reduced. be able to.
【０００８】[0008]
【発明の効果】本発明は以上の通りであるので、冒頭に
言及した従来技術の課題を一掃できると共に、Ｏ2の変
化によっても影響されることなく、ＮＯx 値を低減する
ことができる大きな利点がある。Since the present invention is as described above, the problems of the prior art mentioned at the beginning can be eliminated, and the NO x value can be reduced without being affected by the change of O 2. There are advantages.
【図１】本発明の断面的説明図である。FIG. 1 is a cross-sectional explanatory view of the present invention.
【図２】図１のＡ−Ａ線の断面図説明的である。2 is a cross-sectional explanatory view taken along the line AA of FIG.
【図３】本発明の特性を示す説明図である。FIG. 3 is an explanatory diagram showing characteristics of the present invention.
【符号の説明】 １ バーナ筒 ２ 保炎面 ３ 火炎 ４ ガス室 ５ ガス管 ６ 空気流通スリット部 ７ 半径方向ガス噴出孔 ８ 保炎面方向ガス噴出孔 ９ 渦流[Explanation of reference symbols] 1 burner cylinder 2 flame holding surface 3 flame 4 gas chamber 5 gas pipe 6 air flow slit portion 7 radial gas ejection hole 8 flame holding surface direction gas ejection hole 9 vortex flow
Claims (3)
保炎面から距離を設定してガス室を設け、該ガス室はガ
ス管と接続すると共に前記ガス室の周端部と前記バーナ
筒の内壁との間には空気流通スリット部を設け、前記ガ
ス室の周端部には半径方向に開口した半径方向ガス噴出
孔を設けた予混合バーナ装置。1. A gas chamber is provided in a burner cylinder having a flame-holding surface at its tip at a distance from the flame-holding surface, and the gas chamber is connected to a gas pipe and at the peripheral end of the gas chamber. A premix burner device in which an air circulation slit portion is provided between the burner cylinder and an inner wall of the burner cylinder, and radial gas ejection holes that are opened in a radial direction are provided at a peripheral end portion of the gas chamber.
保炎面から距離を設定してガス室を設け、該ガス室はガ
ス管と接続すると共に前記ガス室と前記バーナ筒の内壁
との間には空気流通スリット部を設け、前記ガス室には
前記保炎面方向に向けて開口した保炎面方向ガス噴出孔
を形成した予混合バーナ装置。2. A gas chamber is provided in a burner cylinder having a flame-holding surface at its tip at a distance from the flame-holding surface, the gas chamber is connected to a gas pipe, and the gas chamber and the burner cylinder are connected to each other. A premix burner device in which an air circulation slit portion is provided between the inner wall and the gas chamber, and a flame holding surface direction gas ejection hole opened toward the flame holding surface direction is formed in the gas chamber.
ナ筒の直径口との関係に於いて、Ｌ／Ｄ＝０．２５以下
とした第１項及び第２項記載の予混合バーナ装置。3. The premixing according to claim 1, wherein the distance L from the gas chamber to the flame holding surface is L / D = 0.25 or less in relation to the diameter opening of the burner cylinder. Burner device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4347973A JP2759402B2 (en) | 1992-12-28 | 1992-12-28 | Premix burner device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4347973A JP2759402B2 (en) | 1992-12-28 | 1992-12-28 | Premix burner device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06201110A true JPH06201110A (en) | 1994-07-19 |
| JP2759402B2 JP2759402B2 (en) | 1998-05-28 |
Family
ID=18393874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4347973A Expired - Fee Related JP2759402B2 (en) | 1992-12-28 | 1992-12-28 | Premix burner device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2759402B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10038716A1 (en) * | 2000-08-09 | 2002-02-21 | Bosch Gmbh Robert | Porus block gas burner, includes flow distributor causing localized recirculation in approaching gas-air mixture |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS606934U (en) * | 1983-06-28 | 1985-01-18 | 新日本製鐵株式会社 | Surface combustion burner mixer |
| JPS606933U (en) * | 1983-06-28 | 1985-01-18 | 新日本製鐵株式会社 | surface combustion burner |
| JPH0194725U (en) * | 1987-12-12 | 1989-06-22 |
-
1992
- 1992-12-28 JP JP4347973A patent/JP2759402B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS606934U (en) * | 1983-06-28 | 1985-01-18 | 新日本製鐵株式会社 | Surface combustion burner mixer |
| JPS606933U (en) * | 1983-06-28 | 1985-01-18 | 新日本製鐵株式会社 | surface combustion burner |
| JPH0194725U (en) * | 1987-12-12 | 1989-06-22 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10038716A1 (en) * | 2000-08-09 | 2002-02-21 | Bosch Gmbh Robert | Porus block gas burner, includes flow distributor causing localized recirculation in approaching gas-air mixture |
| DE10038716C2 (en) * | 2000-08-09 | 2002-09-12 | Bosch Gmbh Robert | Gas burner with a porous material burner with a homogeneous combustion process |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2759402B2 (en) | 1998-05-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |