JPH03191202A - Burner for generating low amount of nitrogen oxide of high load for boiler - Google Patents
Burner for generating low amount of nitrogen oxide of high load for boilerInfo
- Publication number
- JPH03191202A JPH03191202A JP32671589A JP32671589A JPH03191202A JP H03191202 A JPH03191202 A JP H03191202A JP 32671589 A JP32671589 A JP 32671589A JP 32671589 A JP32671589 A JP 32671589A JP H03191202 A JPH03191202 A JP H03191202A
- Authority
- JP
- Japan
- Prior art keywords
- secondary air
- inner tube
- burner
- front plate
- injection holes
- 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
【発明の詳細な説明】
（産業上の利用分野）
本発明はボイラ用高負荷窒素酸化物低発生バーナに関す
るものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a high-load burner for boilers with low nitrogen oxide generation.
（従来の技術）
従来、ボイラ用バーナとしては、当業者に於いて周知の
、いわゆる「先混合プラストバーナ」が多く使用されて
いる。かかるバーナは、窒素酸化物（以下ＮＯＸという
）の発生値が、０１＝０％換算で、７５〜１）００ｐｐ
であり、公的規制値をオーバーしてしまう。このため、
反応温度を低く抑制するために、例えば水蒸気噴霧等が
必要となり、設備費等に影響せざるを得なかった。更に
従来の前記バーナは、燃焼室負荷が１５０〜３５０×１
０’ｋｃａｊ！／ｒｒｆ・ｈと小さく、ボイラの小型化
が困難であった。(Prior Art) Conventionally, so-called "pre-mixed plastic burners", which are well known to those skilled in the art, have been widely used as burners for boilers. Such a burner has a nitrogen oxide (hereinafter referred to as NOX) generation value of 75 to 1)00pp, calculated as 01=0%.
This exceeds the official regulation value. For this reason,
In order to keep the reaction temperature low, for example, water vapor spraying or the like is required, which inevitably affects equipment costs and the like. Furthermore, the conventional burner has a combustion chamber load of 150 to 350 x 1
0'kcaj! /rrf·h, making it difficult to downsize the boiler.
（発明が解決しようとする課題）
水蒸気噴霧装置等のバーナに附属させる特別の装置を設
けないで、燃焼の段階でＮＯ，の発生を公的規制値以下
に抑制し、具体的には０□＝０％換算で６０ｐｐｍ以下
に抑制すると同時に、燃焼室負荷２０００〜３０００
Ｘ １０’ｋｃａ ｉ！ ／ ｒｒｒ −ｈの高負荷燃
焼が達成でき、低圧使用できる小型で安価なバーを提供
することが課題である。(Problem to be solved by the invention) Without installing a special device attached to the burner such as a steam spray device, the generation of NO during the combustion stage can be suppressed to below the official regulation value, and specifically, 0□ = 0% conversion to 60 ppm or less, and at the same time reduce the combustion chamber load to 2000 to 3000
X 10'kca i! The problem is to provide a small and inexpensive bar that can achieve high-load combustion of / rrr -h and can be used at low pressure.
（課題を解決するための手段） 前記した課題を達成するために次の手段を必要とする。(Means for solving problems) In order to achieve the above-mentioned task, the following means are required.
即ち、インナーチューブ先端部近傍外周にリアプレート
を設け、該リアプレートには多数の二次空気噴出孔を放
射状に配列し、前記インナーチューブの先端部にはフロ
ントプレートを設け、該フロントプレートと前記リアプ
レート間の前記インナーチューブには、半径方向に混合
ガス噴出孔を設けた構成である。That is, a rear plate is provided on the outer periphery near the tip of the inner tube, a large number of secondary air injection holes are arranged radially on the rear plate, a front plate is provided on the tip of the inner tube, and the front plate and the The inner tube between the rear plates is provided with mixed gas ejection holes in the radial direction.
また、前記混合ガス噴出孔は、前記二次空気噴出孔の配
列間に設けた構成としてもよく、また、前記二次空気噴
出孔は配列毎にその大きさを変化させた構成としてもよ
く、また、前記二次空気噴出孔は、インナーチューブ側
から外側に行くにつれて、その大きさを変化させた構成
としてもよく、また、前記インナーチューブの上流側に
ガス噴出孔を設け、且つその近傍に一次空気噴出孔を設
けた構成としてもよく、また、前記インナーチューブの
中心部にパイロットバーナ管を設け、該パイロットバー
ナ管の先端部は、前記フロントプレートを貫通させた構
成としてもよく、更に、前記フロントプレートの外側に
先広がり状のバーナタイルを設けた構成としてもよい。Further, the mixed gas ejection hole may be provided between the arrays of the secondary air ejection holes, or the size of the secondary air ejection holes may be changed for each arrangement, Further, the secondary air ejection hole may have a configuration in which the size thereof changes as it goes from the inner tube side to the outside, and the gas ejection hole may be provided on the upstream side of the inner tube, and the gas ejection hole may be provided in the vicinity thereof. A configuration may be provided in which a primary air ejection hole is provided, or a pilot burner tube may be provided in the center of the inner tube, and the tip portion of the pilot burner tube may be configured to pass through the front plate, and further, A configuration may also be adopted in which a flared burner tile is provided on the outside of the front plate.
（作 用）
二次空気噴出孔から噴出する二次空気の一部はフロント
プレートに衝突してフロントプレート裏側全域に無数の
小渦流を形成する。かかる小渦流に混合気噴出孔から噴
出するガス空気の混合ガスが衝突して、更に良好な混合
気となって着火する。(Function) A portion of the secondary air ejected from the secondary air outlet collides with the front plate and forms countless small vortices all over the back side of the front plate. The gas-air mixture ejected from the air-fuel mixture jet collides with this small vortex, resulting in a better air-fuel mixture that ignites.
このようにして、独特の着火源を得ることができると同
時に二次空気噴出孔から噴出する二次空気の他の部分と
、更に衝突混合しながら、フロントプレートに案内され
て、フロントプレートの表側に燃焼ガスの循環流をつく
りつつ、フロントプレートの外周に薄膜環状火炎を形成
する。In this way, a unique ignition source can be obtained, and at the same time, the secondary air ejected from the secondary air nozzle is guided to the front plate while further impingingly mixing with the other part of the secondary air ejected from the secondary air outlet. A thin film annular flame is formed around the outer periphery of the front plate while creating a circulating flow of combustion gas on the front side.
（実施例）
符号Ｉはインナーチューブ１の先端部近傍外周にリアプ
レート２を設け、該リアプレート２には、多数の二次空
気噴出孔３を放射状に配列し、前記インナーチューブｌ
の先端部にはフロントプレート４を設け、該フロントプ
レート４と前記リニアプレート２間の前記インナーチュ
ーブ１には半径方向に混合ガス噴出孔５を設ける構成と
する。(Example) Reference numeral I indicates a rear plate 2 provided on the outer periphery near the tip of the inner tube 1, in which a large number of secondary air ejection holes 3 are arranged radially, and the inner tube l
A front plate 4 is provided at the tip of the linear plate 2, and the inner tube 1 between the front plate 4 and the linear plate 2 is provided with mixed gas ejection holes 5 in the radial direction.
前記混合ガス噴出孔４は前記二次空気噴出孔の配列間に
設けてもよく、また、前記二次空気噴出孔３は配列毎に
その大きさを変化させてもよく、また、前記二次空気噴
出孔３はインナーチューブ側から外側に行くにつれて、
その大きさを変化させてもよい。更に、前記インナーチ
ューブ１の上流側にガス噴出孔６を設け、且つその近傍
に一次空気噴出孔７を設ける構成としてもよい、更に前
記インナーチューブ１の中心部にパイロットバーナ管８
を設け、該パイロットバーナ管８の先端部は前記フロン
トプレート４を貫通させた構成としてもよく、また、前
記フロントプレート４の外側に先広がり状のバーナタイ
ル９を設けた構成としてもよい。The mixed gas jetting holes 4 may be provided between the arrays of the secondary air jetting holes, and the size of the secondary air jetting holes 3 may be changed for each array. As the air jet holes 3 go from the inner tube side to the outside,
Its size may be changed. Furthermore, a gas ejection hole 6 may be provided on the upstream side of the inner tube 1, and a primary air ejection hole 7 may be provided in the vicinity thereof.Furthermore, a pilot burner pipe 8 may be provided in the center of the inner tube 1.
The pilot burner tube 8 may have a configuration in which its tip end passes through the front plate 4, or a configuration in which a flared burner tile 9 is provided outside the front plate 4.
以上の構成に於いて、燃焼用空気が図中矢印の通り、二
次空気流通部１０に導入されてくると、その一部は、−
次空気噴出孔７から、インナーチューブ１内に入る。一
方、ガス噴出孔６からは燃焼ガスが噴出しているので、
ガスと一次空気は混合しながら、インナーチューブ１の
先端部に達し混合ガス噴出孔５から噴出する。かかる際
、二次空気の他の部分は二次空気流通部１０を、図中矢
印の通り流れて二次空気噴出孔３の個所に達し、そこか
ら噴出する。二次空気の一部はフロントプレート４に衝
突して、フロントプレート４の裏側全域に無数の小渦流
を形成する。かかる小渦流に前記した混合ガスが、混合
ガス噴出孔５から噴出するので、混合ガスと二次空気は
衝突して、更に良好な混合気となって着火する。このよ
うにして、独特な着火源を得ることができると同時に二
次空気噴出孔３から噴出する二次空気の他の部分と、更
に衝突混合しながら、フロントプレート４に案内されて
、フロントプレート４の表側に燃焼ガスの循環流をつく
りつつ、フロントプレート４の外周に薄膜環状火炎１）
を形成する。In the above configuration, when the combustion air is introduced into the secondary air circulation section 10 as indicated by the arrow in the figure, a part of it is -
Next, air enters the inner tube 1 through the air blowout hole 7. On the other hand, since combustion gas is ejected from the gas ejection hole 6,
The gas and primary air reach the tip of the inner tube 1 while being mixed and are ejected from the mixed gas ejection hole 5. At this time, the other part of the secondary air flows through the secondary air circulation part 10 as indicated by the arrow in the figure, reaches the secondary air ejection hole 3, and is ejected from there. A portion of the secondary air collides with the front plate 4 and forms countless small vortices all over the back side of the front plate 4. Since the mixed gas described above is ejected from the mixed gas jetting hole 5 in the small vortex, the mixed gas and the secondary air collide to form a better air-fuel mixture and ignite. In this way, a unique ignition source can be obtained, and at the same time, the secondary air is mixed with other parts of the secondary air ejected from the secondary air ejection holes 3, and is guided to the front plate 4, causing the While creating a circulating flow of combustion gas on the front side of the plate 4, a thin annular flame 1) is placed around the outer periphery of the front plate 4.
form.
以上に際して、前記二次空気噴出孔の配列間に図の通り
、混合ガス噴出孔４を設けると混合ガスと二次空気との
混合が局部的とならず、前記した小渦流との混合ガスが
良好に行なわれる。また、二次空気噴出孔３の大きさを
、放射状の配列毎に変化させることにより或はインナー
チューブ１側から外側に行くにつれて適宜変化させるこ
とにより、前記混合ガスと二次空気の局部的混合を避け
ることができ、火炎の形成、保持を一層良好なものとす
ることができる。更に、実施例ではインナーチューブ１
の上流側にガス噴出孔６を設けると共にその近傍に一次
空気噴出孔７を設ける構成としたが、インナーチューブ
１内を流れる気体がガス空気の混合ガスであれば、いか
なる構成を採用してもよく、例えばあらかじめ混合され
たものをインナーチューブ１を介して混合ガス噴出孔５
に導くようにしてもよい、また、インナーチューブｌ内
にパイロットバーナ管８を設け、フロントプレート４を
貫通させた状態にし、フロントプレート４の表側でパイ
ロット炎１２を形成すると、ターンダウンレシオが大き
くとれ、燃焼範囲を広（することができ、前記した燃焼
の安定を一層促進することができる。更に、前記フロン
トプレート４の外側に先広がり状のバーナタイル９を設
けることにより、前記した薄膜環状火炎を、バーナタイ
ルの広がり角度によって所望のものとすることができる
。In this case, if a mixed gas jetting hole 4 is provided between the arrays of the secondary air jetting holes as shown in the figure, the mixing of the mixed gas and the secondary air will not be localized, and the mixed gas with the above-mentioned small vortex flow will be prevented. Well done. In addition, by changing the size of the secondary air ejection holes 3 for each radial arrangement or by appropriately changing the size from the inner tube 1 side to the outside, local mixing of the mixed gas and the secondary air can be achieved. can be avoided, and flame formation and retention can be made even better. Furthermore, in the embodiment, the inner tube 1
Although the gas ejection hole 6 is provided on the upstream side of the inner tube 1 and the primary air ejection hole 7 is provided in the vicinity thereof, any structure may be adopted as long as the gas flowing inside the inner tube 1 is a gas-air mixture. Often, for example, a pre-mixed mixture is passed through the inner tube 1 to the mixed gas outlet 5.
Alternatively, if the pilot burner pipe 8 is provided in the inner tube l and passed through the front plate 4, and the pilot flame 12 is formed on the front side of the front plate 4, the turndown ratio can be increased. The combustion range can be widened, and the above-mentioned stability of combustion can be further promoted.Furthermore, by providing the burner tile 9 with a tapered shape on the outside of the front plate 4, the above-mentioned thin film annular shape can be The flame can be made as desired by the spread angle of the burner tiles.
しかして、前記した薄膜環状火炎１）は、大きな表面積
をもっているので、ボイラに取着けた場合、水管、水冷
壁との熱の授受が急速に行なわれ、火炎温度が低下し、
且つ滞留時間が短かいので、ＮＯ，ｌの生成が抑制され
る。更にフロントプレート４の表側に形成される再循環
流１３によって燃焼ガスの巻き込み効果が促進され、低
温燃焼が実行できＮＯｘの発生が低減される。However, since the thin film annular flame 1) described above has a large surface area, when it is installed in a boiler, heat is rapidly exchanged with the water pipes and water cooling walls, and the flame temperature decreases.
Moreover, since the residence time is short, the generation of NO, 1 is suppressed. Furthermore, the recirculation flow 13 formed on the front side of the front plate 4 promotes the entrainment effect of combustion gas, allowing low-temperature combustion to be performed and reducing the generation of NOx.
更に、前記した通り、独特の混合方式による良好な混合
燃焼によって火炎の長さは従来の１）５〜１／３と非常
に短かく、従来では考えられない２０００〜３０００
Ｘ １０’ｋｃａ ｅ ／ ｒｄ ・ｈの高負荷燃焼が
達成でき、ボイラ自体のコンパクト化が実現できる。Furthermore, as mentioned above, due to the unique mixing method and good mixed combustion, the flame length is extremely short, 1) 5 to 1/3 of the conventional length, which is unthinkable in the past.
A high-load combustion of X 10' kca e/rd ·h can be achieved, and the boiler itself can be made more compact.
第３図は本発明のＮＯ，排出特性図であり、第４図は従
来バーナと比較した負荷に対する排ガス０２特性図であ
る。かかる図によって本発明が燃焼に優れていることが
明白に理解できる。FIG. 3 is an NO and emission characteristic diagram of the present invention, and FIG. 4 is an exhaust gas 02 characteristic diagram with respect to load in comparison with a conventional burner. From this figure, it can be clearly understood that the present invention is excellent in combustion.
（発明の効果）
本発明は以上の通り、バーナに特別の基準を附属させる
ことなく、バーナ自体でＮＯ，の発生を公的規制値まで
低減できるものであり、加えて格段に優れた保炎効果に
よる燃焼の安定によって抜群の高負荷燃焼が達成できる
等の効果がある。(Effects of the Invention) As described above, the present invention is capable of reducing the generation of NO to the official regulation value in the burner itself without attaching any special standards to the burner. The effects include the ability to achieve outstanding high-load combustion by stabilizing combustion.
第１図は本発明バーナの全体を示す断面的説明図、第２
図はＡ−Ａ線断面図、第３図はＮＯｘ排出特性図、第４
図は高負荷燃焼特性図である。
符号１・・・インナーチューブ、２・・・リアプレート
、３・・・二次空気噴出孔、４・・・フロントプレート
、５・・・混合ガス噴出孔、６・・・ガス噴出孔、７・
・・−次空気噴出孔、８・・・パイロットバーナ管、９
・・・バーナタイル、１０・・・二次空気流通部、１）
・・・薄膜環状火炎、工２・・・パイロット炎。Fig. 1 is a cross-sectional explanatory diagram showing the entire burner of the present invention;
The figure is a sectional view taken along the line A-A, Figure 3 is a NOx emission characteristic diagram, and Figure 4 is a diagram of NOx emission characteristics.
The figure is a high-load combustion characteristic diagram. Code 1: Inner tube, 2: Rear plate, 3: Secondary air outlet, 4: Front plate, 5: Mixed gas outlet, 6: Gas outlet, 7・
...-Next air outlet, 8...Pilot burner pipe, 9
... burner tile, 10 ... secondary air circulation section, 1)
...thin film annular flame, work 2...pilot flame.
Claims (7)
を設け、該リアプレートには多数の二次空気噴出孔を放
射状に配列し、前記インナーチューブの先端部にはフロ
ントプレートを設け、該フロントプレートと前記リアプ
レート間の前記インナーチューブには、半径方向に混合
ガス噴出孔を設けたボイラ用高負荷窒素酸化物低発生バ
ーナ(1) A rear plate is provided on the outer periphery near the tip of the inner tube, a large number of secondary air injection holes are arranged radially on the rear plate, a front plate is provided on the tip of the inner tube, and the front plate and The inner tube between the rear plates is equipped with a high load low nitrogen oxide generation burner for a boiler, which is provided with mixed gas injection holes in the radial direction.
列間に設けた第１項記載のボイラ用高負荷窒素酸化物低
発生バーナ(2) The mixed gas nozzle is a high-load nitrogen oxide low generation burner for a boiler according to item 1, which is provided between the array of the secondary air nozzles.
させた第１項記載のボイラ用高負荷窒素酸化物低発生バ
ーナ(3) The high-load low nitrogen oxide generation burner for a boiler according to item 1, wherein the size of the secondary air injection holes is changed depending on the arrangement.
外側に行くにつれて、その大きさを変化させた第１項記
載のボイラ用高負荷窒素酸化物低発生バーナ(4) The high load low nitrogen oxide generation burner for a boiler according to item 1, wherein the size of the secondary air blowout hole changes as it goes from the inner tube side to the outside.
け、且つその近傍に一次空気噴出孔を設けた第１項記載
のボイラ用高負荷窒素酸化物低発生バーナ(5) The high-load low nitrogen oxide generation burner for a boiler according to item 1, wherein a gas jet hole is provided on the upstream side of the inner tube, and a primary air jet hole is provided in the vicinity thereof.
ナ管を設け、該パイロットバーナ管の先端部は、前記フ
ロントプレートを貫通させた第１項記載のボイラ用高負
荷窒素酸化物低発生バーナ(6) A pilot burner tube is provided in the center of the inner tube, and the tip of the pilot burner tube penetrates the front plate.
ナタイルを設けたボイラ用高負荷窒素酸化物低発生バー
ナ(7) High load low nitrogen oxide generation burner for boilers with flared burner tiles provided on the outside of the front plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1326715A JP2530920B2 (en) | 1989-12-16 | 1989-12-16 | High load nitrogen oxide low burner for boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1326715A JP2530920B2 (en) | 1989-12-16 | 1989-12-16 | High load nitrogen oxide low burner for boiler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03191202A true JPH03191202A (en) | 1991-08-21 |
| JP2530920B2 JP2530920B2 (en) | 1996-09-04 |
Family
ID=18190865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1326715A Expired - Lifetime JP2530920B2 (en) | 1989-12-16 | 1989-12-16 | High load nitrogen oxide low burner for boiler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2530920B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010032184A (en) * | 2008-07-31 | 2010-02-12 | Tokyo Gas Co Ltd | Burner for fuel cell reformer, and reformer equipped with it |
| CN103912874A (en) * | 2012-12-30 | 2014-07-09 | 梁燕龙 | Premix type gas burner nozzle and method thereof |
| CN103912875A (en) * | 2013-01-06 | 2014-07-09 | 梁燕龙 | Adjustable premixing type gas nozzle and method |
| CN112728532A (en) * | 2021-01-20 | 2021-04-30 | 瓦兰热能设备(无锡)有限公司 | Burner and boiler |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5460742U (en) * | 1977-10-07 | 1979-04-26 | ||
| JPS5888507U (en) * | 1981-12-12 | 1983-06-15 | 大阪瓦斯株式会社 | Low NOx gas burner |
-
1989
- 1989-12-16 JP JP1326715A patent/JP2530920B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5460742U (en) * | 1977-10-07 | 1979-04-26 | ||
| JPS5888507U (en) * | 1981-12-12 | 1983-06-15 | 大阪瓦斯株式会社 | Low NOx gas burner |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010032184A (en) * | 2008-07-31 | 2010-02-12 | Tokyo Gas Co Ltd | Burner for fuel cell reformer, and reformer equipped with it |
| CN103912874A (en) * | 2012-12-30 | 2014-07-09 | 梁燕龙 | Premix type gas burner nozzle and method thereof |
| CN103912875A (en) * | 2013-01-06 | 2014-07-09 | 梁燕龙 | Adjustable premixing type gas nozzle and method |
| CN112728532A (en) * | 2021-01-20 | 2021-04-30 | 瓦兰热能设备(无锡)有限公司 | Burner and boiler |
| CN112728532B (en) * | 2021-01-20 | 2024-11-29 | 瓦兰热能设备(无锡)有限公司 | Burner and boiler |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2530920B2 (en) | 1996-09-04 |
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