JPS6239329B2 - - Google Patents
Info
- Publication number
- JPS6239329B2 JPS6239329B2 JP57122309A JP12230982A JPS6239329B2 JP S6239329 B2 JPS6239329 B2 JP S6239329B2 JP 57122309 A JP57122309 A JP 57122309A JP 12230982 A JP12230982 A JP 12230982A JP S6239329 B2 JPS6239329 B2 JP S6239329B2
- Authority
- JP
- Japan
- Prior art keywords
- flame
- primary
- combustion
- burner
- port
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
- F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
- F23D14/10—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with elongated tubular burner head
- F23D14/105—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with elongated tubular burner head with injector axis parallel to the burner head axis
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gas Burners (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は家庭用燃焼器具に適した、低NOx
で、かつ、雰囲気酸素濃度低下時にも安定した燃
焼を得る燃焼分野に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is suitable for household combustion appliances and has low NOx
The present invention also relates to the field of combustion in which stable combustion is achieved even when atmospheric oxygen concentration is reduced.
従来例の構成とその問題点
従来の家庭用燃焼器具の多くは、ブンゼンバー
ナを使用しているので、そのNOx値は100〜
150ppmと高く、室内開放器具の低NOx化が望ま
れている。Conventional configurations and their problems Many conventional household combustion appliances use Bunsen burners, and their NOx values range from 100 to 100.
It is high at 150ppm, and it is desired to reduce NOx in indoor open appliances.
シユバンクバーナ等大気圧全一次バーナで低
NOxバーナが実用化されているが、生産コスト
が高い、TDRが取り難い、燃焼部の投影面積が
大きくなるといつた欠点を有しているので、その
用途はストーブ等に限定されていた。 Low in atmospheric pressure primary burners such as Shubank burners.
Although NOx burners have been put into practical use, they have drawbacks such as high production costs, difficulty in achieving TDR, and a large projected area of the combustion section, so their use has been limited to stoves and the like.
一方、第３図の特願昭55−74910号（特開昭57
−412号公報）のように、ブンゼンバーナを１次
燃焼、２次燃焼に分割しNOxを下げるバーナ装
置が提案されているが、燃焼量を可変させ低負荷
で燃焼させた場合、特に雰囲気酸素濃度が低下し
た時に２次燃焼炎の両端がリフトしやすく燃焼を
悪化しやすいという欠点を有するものであつた。 On the other hand, Japanese Patent Application No. 55-74910 (Japanese Unexamined Patent Publication No. 57-1989) shown in Figure 3
A burner device that divides the Bunsen burner into primary combustion and secondary combustion to reduce NOx has been proposed, as in the publication No. 412), but when the combustion amount is varied and combustion is performed at a low load, it is difficult to reduce the This has the disadvantage that both ends of the secondary combustion flame tend to lift when the concentration decreases, which tends to worsen combustion.
発明の目的
本発明は従来例の欠点を改良し、低NOxを達
成すると共に、広範囲な燃焼量の可変にも対応出
来、かつ、雰囲気酸素濃度低下時にも安定した燃
焼が得られるバーナ装置を提供するものである。Purpose of the Invention The present invention improves the drawbacks of the conventional example, and provides a burner device that achieves low NOx, is capable of varying the combustion amount over a wide range, and is capable of achieving stable combustion even when the atmospheric oxygen concentration decreases. It is something to do.
発明の構成
本発明は、ブンゼンバーナの燃焼炎を１次燃焼
室を設けることにより１次燃焼，２次燃焼に分割
し、火炎温度を下げることにより低NOx化を達
成すると共に、１次燃焼室に設けた単一の２次炎
口の両端部の幅を短くすることによつて、燃焼量
を絞つた低負荷燃焼時にも雰囲気酸素濃度が低下
しても安定した燃焼が得られるものである。Composition of the Invention The present invention divides the combustion flame of a Bunsen burner into primary combustion and secondary combustion by providing a primary combustion chamber, and achieves low NOx by lowering the flame temperature. By shortening the width of both ends of the single secondary flame port provided in the combustion chamber, stable combustion can be obtained even when the atmospheric oxygen concentration decreases even during low-load combustion with a reduced combustion amount. .
実施例の説明
第１図は本発明の一実施例の構成を示す斜視
図、第２図は雰囲気酸素濃度低下時のCO／
CO2，NOx特性を示す。DESCRIPTION OF EMBODIMENTS Fig. 1 is a perspective view showing the configuration of an embodiment of the present invention, and Fig. 2 shows CO/
Shows CO 2 and NOx characteristics.
以下、本発明の一実施例について、第１図〜第
２図に基づいて説明する。気体燃料はノズル１か
ら噴出され、バーナ２の混合管入口部３から入
り、そのジエツトにより周囲から大気を１次空気
として吸引する。その際１次空気量は空気過剰率
ｍが0.6〜0.9になるように混合管入口部３の口径
をダンパ等により調整する。気体燃焼と空気は混
合管４で混合され、可燃性気体となり、複数の１
次炎口５上で火炎を形成する。 An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. Gaseous fuel is ejected from a nozzle 1, enters a mixing pipe inlet 3 of a burner 2, and the jet draws atmospheric air from the surroundings as primary air. At this time, the primary air amount is adjusted by using a damper or the like to adjust the diameter of the mixing tube inlet 3 so that the excess air ratio m is 0.6 to 0.9. Gaseous combustion and air are mixed in the mixing tube 4 to become a flammable gas,
Next, a flame is formed on the flame port 5.
２次炎口６は単一の炎口となつているがその両
端部の幅は中央部に比較して短かく設定されてい
る。このように設定された２次炎口６を有すると
共に１次燃焼室７を形成する矩形状の容器８が１
次炎口５あるいはバーナ全体４を覆うことにより
本発明のバーナ装置は構成されている。 The secondary burner port 6 is a single burner port, but the width of both ends thereof is set to be shorter than that of the center portion. A rectangular container 8 having the secondary flame port 6 set in this way and forming the primary combustion chamber 7 is 1
The burner device of the present invention is constructed by covering the burner port 5 or the entire burner 4.
上記構成において、混合管内の可燃焼性気体は
空気不足の雰囲気であり、この状態で１次炎口に
流れ込み、１次火炎を形成する。不足空気は１次
炎口が１次燃焼室で覆われているために回復でき
ず、未然ガスは２次炎口上で漸く２次空気と接触
し、ここで２次火炎を形成することになる。この
ように火炎は１次火炎と２次火炎に分離され、両
炎口上に安定した火炎を保つ。 In the above configuration, the combustible gas in the mixing tube is in an air-deficient atmosphere, and in this state flows into the primary flame port to form a primary flame. The lack of air cannot be recovered because the primary flame port is covered by the primary combustion chamber, and the gas finally comes into contact with the secondary air above the secondary flame port, where it forms a secondary flame. . In this way, the flame is separated into a primary flame and a secondary flame, and a stable flame is maintained above both flame ports.
第２図の曲線Ａ，Ｂはそれぞれ燃焼量大（高負
荷），大時の約1/3時の小（低負荷）時のCO／
CO2特性を示し、曲線ａ，ｂはそれぞれ燃焼量大
（高負荷），小（低負荷）時のNOx特性を示す。 Curves A and B in Figure 2 are CO/2 when the combustion amount is large (high load) and when the combustion amount is small (low load), which is about 1/3 of the large amount.
The curves a and b show the NOx characteristics when the combustion amount is large (high load) and small (low load), respectively.
さらに曲線A′，B′，a′，b′は従来例の単一の長
方形状の同一幅の２次炎口の場合の前記に対応し
た特性を示す。 Further, curves A', B', a', and b' show the corresponding characteristics in the case of a conventional single rectangular secondary flame port of the same width.
雰囲気酸素濃度が低下した場合、NOx特性は
ほとんど同じであるが、CO／CO2特性が本発明
の方がすぐれているのは２次炎口両端部の幅を短
かくしている為に両端部からのリフトを防止して
いるからである。 When the atmospheric oxygen concentration decreases, the NOx characteristics are almost the same, but the reason why the present invention has better CO/CO 2 characteristics is because the width of both ends of the secondary flame opening is shortened, This is because it prevents lift.
尚、燃焼量小（低負荷）時に前記効果が著るし
いのは、従来例では両端部が一層リフトしやすい
ものである点からも当然である。 Note that the above effect is remarkable when the combustion amount is small (low load), as is obvious from the fact that in the conventional example, both ends are easier to lift.
さらに、燃焼量小時のNOx特性が従来例より
優れている理由は、２次炎口から２次空気が１次
燃焼室内に少量流入し、１次火炎の温度を上げて
いるものであり、本発明ではこの点も改良された
ことになる。 Furthermore, the reason why the NOx characteristics are better than the conventional example when the combustion amount is small is that a small amount of secondary air flows into the primary combustion chamber from the secondary flame port, raising the temperature of the primary flame. The invention also improves this point.
この結果、本実施例のバーナ装置によれば、火
炎の最高温度、並びに平均温度は従来バーナ装置
による火炎温度に比較して低くなり、この火炎温
度低下及び最高温度時のO2濃度の低下に起因し
て窒素酸化物の発生を制御することができる。 As a result, according to the burner device of this embodiment, the maximum temperature and average temperature of the flame are lower than the flame temperature of the conventional burner device, and this decrease in flame temperature and decrease in O 2 concentration at the maximum temperature are As a result, the generation of nitrogen oxides can be controlled.
さらに、雰囲気酸素濃度低下時のCO／CO2特
性の改良がなされ、特に低負荷燃焼時にその効果
が大きいので、従来例に比較して大幅にTDRを
取ることが可能となつた。 Furthermore, the CO/CO 2 characteristics have been improved when the atmospheric oxygen concentration decreases, and the effect is particularly large during low-load combustion, making it possible to achieve a significantly higher TDR than conventional examples.
尚、本実施例では、１次燃焼室内に補助空気を
入れない構成について述べたが、１次空気吸引量
を減らし、その分補助空気を１次燃焼室に供給し
てもほぼ同等の効果が得られるものである。 Although this embodiment describes a configuration in which auxiliary air is not introduced into the primary combustion chamber, almost the same effect can be obtained even if the amount of primary air suction is reduced and the auxiliary air is supplied to the primary combustion chamber accordingly. That's what you get.
さらに、１次燃焼室は１次炎口部を覆うものに
ついて説明したが、吸込口部を除いたバーナ本体
を覆うものであつてもよいことはいうまでもな
い。 Furthermore, although the primary combustion chamber has been described as covering the primary flame port, it goes without saying that it may cover the burner body excluding the suction port.
発明の効果
以上のように本発明のバーナ装置によれば複数
の１次炎口あるいはバーナ全体を１次燃焼室を形
成する矩形状の容器で覆うと共に、前記容器の上
面の長手方向中心線に沿い、単一の開口からなる
２次炎口を設け、かつ前記２次炎の両端部の幅を
中央部よりも短い形状にしたことにより、構成簡
単にして火炎温度が低くなり、窒素酸化物の低減
が図れるものである。Effects of the Invention As described above, according to the burner device of the present invention, a plurality of primary flame ports or the entire burner are covered with a rectangular container forming a primary combustion chamber, and the center line in the longitudinal direction of the upper surface of the container is By providing a secondary flame port consisting of a single opening along the line, and by making the width of both ends of the secondary flame shorter than the central part, the configuration is simplified, the flame temperature is lowered, and nitrogen oxides are reduced. It is possible to reduce this.
さらに、前記構成によつて雰囲気酸素濃度低下
時のCO／CO2特性が改良され、特に低負荷時の
特性が向上し、TDRの拡大も図ることが出来る
ものである。 Furthermore, the above configuration improves the CO/CO 2 characteristics when the atmospheric oxygen concentration decreases, particularly improves the characteristics at low loads, and makes it possible to expand the TDR.
第１図は本発明のバーナ装置の一実施例を示す
斜視図、第２図は雰囲気酸素濃度低下時における
CO／CO2，NOx特性を従来例との比較で示す特
性図、第３図は従来例を示す斜視図である。
２……バーナ、５……１次炎口、６……２次炎
口、７……１次燃焼室、８……容器。
Fig. 1 is a perspective view showing an embodiment of the burner device of the present invention, and Fig. 2 is a perspective view showing an embodiment of the burner device of the present invention.
A characteristic diagram showing CO/CO 2 and NOx characteristics in comparison with a conventional example, and FIG. 3 is a perspective view showing the conventional example. 2...burner, 5...primary flame port, 6...secondary flame port, 7...primary combustion chamber, 8...container.
Claims (1)
バーナ本体を、１次燃焼室を形成する矩形状の容
器で覆うと共に、前記容器の上面の長手方向中心
線に沿い、単一の開口からなる２次炎口を設け、
かつ前記２次炎口の両端部の幅を中央部よりも短
い形状にしたバーナ装置。1. A primary flame port or burner body having a plurality of primary flame ports is covered with a rectangular container forming a primary combustion chamber, and a single opening is provided along the longitudinal center line of the upper surface of the container. A secondary flame opening consisting of
and a burner device in which the width of both ends of the secondary flame port is shorter than the width of the center part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57122309A JPS5912221A (en) | 1982-07-13 | 1982-07-13 | Burner device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57122309A JPS5912221A (en) | 1982-07-13 | 1982-07-13 | Burner device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5912221A JPS5912221A (en) | 1984-01-21 |
| JPS6239329B2 true JPS6239329B2 (en) | 1987-08-22 |
Family
ID=14832762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57122309A Granted JPS5912221A (en) | 1982-07-13 | 1982-07-13 | Burner device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5912221A (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5552172A (en) * | 1978-10-11 | 1980-04-16 | Toshiba Corp | Currency transaction unit |
| JPS56168031A (en) * | 1980-05-29 | 1981-12-24 | Matsushita Electric Ind Co Ltd | Burner |
-
1982
- 1982-07-13 JP JP57122309A patent/JPS5912221A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5912221A (en) | 1984-01-21 |
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