JP2741933B2 - All-primary pneumatic combustion of gas fuel - Google Patents
All-primary pneumatic combustion of gas fuelInfo
- Publication number
- JP2741933B2 JP2741933B2 JP33684089A JP33684089A JP2741933B2 JP 2741933 B2 JP2741933 B2 JP 2741933B2 JP 33684089 A JP33684089 A JP 33684089A JP 33684089 A JP33684089 A JP 33684089A JP 2741933 B2 JP2741933 B2 JP 2741933B2
- Authority
- JP
- Japan
- Prior art keywords
- flame
- air
- combustion
- forming member
- peripheral wall
- 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
Links
- 239000000446 fuel Substances 0.000 title claims description 27
- 238000002485 combustion reaction Methods 0.000 title claims description 22
- 239000000203 mixture Substances 0.000 claims description 21
- 230000002093 peripheral effect Effects 0.000 claims description 16
- 238000013459 approach Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 238000004904 shortening Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 9
- 238000001514 detection method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000006262 metallic foam Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Landscapes
- Control Of Combustion (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、バーナケースの周壁部分と保炎部形成部材
との間に形成した炎口において、ガス燃料と理論空気量
以上の燃焼用空気との混合気を噴出させて燃焼させる方
法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a fuel port formed between a peripheral wall portion of a burner case and a flame holding portion forming member, and a combustion air having a stoichiometric air amount or more. And a method of injecting and burning an air-fuel mixture.
従来、第３図（イ）に示すように、バーナケース
（１）の周壁部分（1a）の近くにも保炎部（Ｘ）を形成
し、周壁部分（1a）と保炎部形成部材（４）の間の炎口
（６）において、断面形状が山形状の炎を両側の基端が
保炎部に接近する状態で形成させていた。Conventionally, as shown in FIG. 3 (a), a flame holding portion (X) is formed near the peripheral wall portion (1a) of the burner case (1), and the peripheral wall portion (1a) and the flame retaining portion forming member ( In the flame outlet (6) during 4), a flame having a mountain-shaped cross section was formed with the base ends on both sides approaching the flame holding portion.
しかし、低NOx化のために炎口（６）に供給する混合
気の空気比を増大させると、混合気の噴出速度が増大し
て、第３図（ロ）に示すように炎（Ｆ）が周壁部分（1
a）から浮上った状態となり、その浮上つた部分（Ｙ）
で不完全燃焼が発生して、CO発生量が増大する。However, increasing the air ratio of the mixture supplied to the flame port for low NO x reduction (6), and ejection speed of the mixture is increased, as shown in FIG. 3 (b) flame (F ) Is the surrounding wall (1
a) It is in a state of floating from the part, and the part of the part that floated (Y)
Incomplete combustion occurs, and the amount of CO generated increases.
したがって、CO発生を十分に抑制するためには空気比
を1.7〜1.8程度以下に設定しなければならず、空気比の
増大による低NOx化の面でさらに改良の余地があった。Therefore, in order to sufficiently suppress the CO occurrence must set the air ratio below about 1.7 to 1.8, there is room for further improvement in terms of low NO x reduction by increasing the air ratio.
また、混合気の圧力や組成が変化したり、インプット
を変更すると、炎（Ｆ）が周壁部分（1a）から浮上って
不完全燃焼したり、炎（Ｆ）の短縮でバーナ焼損やNOx
濃度増大を生じ、炎（Ｆ）の長さ安定化の面でも改良の
余地があった。Also, when the pressure or composition of the air-fuel mixture changes or the input is changed, the flame (F) rises from the peripheral wall portion (1a) and incompletely burns, or the burner burnout or NO x due to the shortening of the flame (F).
The concentration was increased, and there was room for improvement in the stabilization of the length of the flame (F).
本発明の目的は、空気比を1.8〜2.0程度まで増大して
も、不完全燃焼を十分に抑制できるようにし、低NOx化
を一層十分に実現できるようにし、かつ、炎の長さを安
定化して、不完全燃焼防止と低NOx化を一層確実に実現
できると共にバーナ焼損を防止できるようにする点にあ
る。An object of the present invention, even when increasing the air ratio to about 1.8 to 2.0, the incomplete combustion to allow sufficiently suppressed, so the low NO x reduction can be more fully realized, and the length of the flame stabilized lies in to be able to prevent the burner burning with incomplete combustion prevention and low NO x reduction can be more reliably achieved.
本発明の特徴手段は、バーナケースの周壁部分と保炎
部形成部材の間に形成した炎口からの混合気噴出方向に
前記周壁部分から壁体を延出し、前記壁体の延出長さ
l1、前記周壁部分と前記保炎部形成部材の間隔l2を、混
合気の噴出速度ν1と燃焼速度ν2に対して、 l1／l2≧ν1／ν2 になるように設定して、 前記炎口による炎を、基端が前記保炎部形成部材に接
近すると共に先端が前記壁体に接近する状態で、かつ、
断面形状がほぼ三角形になる状態で形成させ、 前記炎口による炎の先端が設定範囲内に位置するか否
かを判定して、空気比減小による炎の短縮及び空気比増
大による炎の増長により炎の先端の位置を設定範囲内に
維持するように、前記炎口に供給する空燃混合気の空気
比を調節することにあり、その作用効果は次の通りであ
る。The characteristic means of the present invention is such that the wall extends from the peripheral wall in a direction in which the air-fuel mixture is ejected from a flame port formed between the peripheral wall of the burner case and the flame holding portion forming member, and the extension length of the wall is
l 1 , the interval l 2 between the peripheral wall portion and the flame holding part forming member is set such that l 1 / l 2 ≧ ν 1 / ν 2 with respect to the jet velocity ν 1 and the combustion velocity ν 2 of the air-fuel mixture. Setting, the flame by the flame outlet, in a state where the base end approaches the flame holding part forming member and the tip approaches the wall body, and
It is formed in a state where the cross-sectional shape is substantially triangular, and it is determined whether the tip of the flame by the flame port is located within a set range, and the flame is shortened by decreasing the air ratio and the flame is increased by increasing the air ratio. Therefore, the air ratio of the air-fuel mixture supplied to the flame outlet is adjusted so that the position of the tip of the flame is maintained within the set range. The operation and effect are as follows.
つまり、いかなる手段を講じれば安定燃焼を維持しな
がら空気比を増大できるかについて、各種実験により追
求したところ、例えば第１図に示すように、壁体の延出
長さl1を十分に大きくし、その延出長さl1、及び、周壁
部分と保炎部形成部材の間隔l2を、空気比の混合気の噴
出速度ν1と燃焼速度ν2に見合ってかつ上述の式を満た
すように設定すると、炎口による炎がほぼ三角形の断面
形状になると共に、炎の基端が保炎部形成部材にかつ先
端が壁体に接近した状態で安定し、例えば空気比を1.8
〜2.0程度に増大しても、例えばCO/CO2＜0.005というよ
うにCO発生を十分に抑制した良好燃焼を安定維持できる
事実を見出した。In other words, whether it increases the air ratio while maintaining a stable combustion when Kojire any means, was pursued by various experiments, for example as shown in FIG. 1, the extending length l 1 of the wall sufficiently large Then, the extension length l 1 , and the interval l 2 between the peripheral wall portion and the flame holding part forming member, satisfy the above-mentioned formula in proportion to the ejection speed ν 1 and the combustion speed ν 2 of the air-fuel mixture. With this setting, the flame formed by the flame outlet has a substantially triangular cross-sectional shape, and the flame is stabilized in a state where the base end is close to the flame holding part forming member and the front end is close to the wall.
Even if it is increased to about 2.0, it has been found that good combustion can be stably maintained with sufficient suppression of CO generation, for example, CO / CO 2 <0.005.
他方、CH4において空気比とNO2濃度の相関を調べたと
ころ、第４図に示すようになり、前述の従来技術のよう
に空気比が1.7から1.8程度以下であれば、NO2濃度が２
〜3ppm以上になるが、本発明のように空気比を1.8〜2.0
程度に増大できるとNO2濃度を2ppm以下にでき、十分な
低NOx化を図れる。On the other hand, was examined the correlation between the air ratio and NO 2 concentrations in CH 4, is as shown in FIG. 4, not more than about 1.8 air ratio is from 1.7 as in the prior art described above, the NO 2 concentration 2
~ 3 ppm or more, but as in the present invention, the air ratio is 1.8 to 2.0.
If it increases to the extent possible the NO 2 concentration 2ppm or less, thereby a sufficiently low NO x reduction.
さらに、炎の長さを安定させるにいかなる手段が有効
であるかについて実験により追求したところ、空気比が
大きくなるほど空気比の変化当りの炎の長さ変化が大き
くなり、低NOx燃焼においては、僅かな空気比の変更で
炎の長さを設定範囲内に維持できる事実を見出した。Furthermore, when the any means to stabilize the length of the flame was pursued by experimentation whether a valid length variation of the flame per change enough air ratio air ratio increases increases, the low NO x combustion Has found that the flame length can be maintained within the set range by a slight change in the air ratio.
そして、空燃混合気の空気比調節によって、混合気の
圧力や組成の変化、インプットの変更にかかわらず、炎
の先端位置を設定範囲内に維持して、不完全燃焼防止と
低NOx化を一層確実に実現できると共にバーナ焼損を防
止できるようになったった。Then, the air ratio regulation of the air-fuel mixture, the change in the pressure and composition of the mixture, regardless of the input of the change, and maintains the position of the tip of the flame within a set range, incomplete combustion prevention and low NO x reduction Can be realized more reliably and burner burnout can be prevented.
その結果、燃焼排ガスのNOxとCOを十分に減少させ
て、ガス燃料の燃焼による大気汚染を一段と効果的に防
止できると共に、バーナの耐久性を向上できる、極めて
優れたガス燃料の全一次空気式燃焼法を確立できた。As a result, sufficiently reduce the NO x and CO in the flue gas, together with the air pollution caused by the combustion of fuel gas can more effectively prevent and improve the durability of the burner, all the primary air of extremely excellent gas fuel The formula combustion method was established.
次に、第１図により実施例を示す。 Next, an embodiment is shown in FIG.
バーナケース（１）にガス燃料供給路（２）とブロア
（Ｂ）からの燃焼用空気供給路（３）を接続し、ガス燃
料と理論空気量以上の燃焼用空気との混合気をバーナケ
ース（１）内に供給する。ガス燃料は都市ガス、天然ガ
ス、プロパン等である。A gas fuel supply path (2) and a combustion air supply path (3) from a blower (B) are connected to the burner case (1), and a mixture of gas fuel and combustion air having a theoretical air amount or more is burned. (1) Supply inside. The gas fuel is city gas, natural gas, propane or the like.
バーナケース（１）の周壁部分（1a）のほぼ中央に保
炎部形成部材（４）を配置し、周壁部分（1a）と保炎部
形成部材（４）の間に多孔体（５）により炎口（６）を
形成し、混合気を炎口（６）から噴出させて燃焼させ
る。多孔体（５）はメタルフォーム、パンチングメタ
ル、金網、多孔セラミックスなどである。A flame holding part forming member (4) is arranged at substantially the center of the peripheral wall part (1a) of the burner case (1), and a porous body (5) is provided between the peripheral wall part (1a) and the flame keeping part forming member (4). A flame port (6) is formed, and the air-fuel mixture is ejected from the flame port (6) and burned. The porous body (5) is a metal foam, a punched metal, a wire mesh, a porous ceramic, or the like.
炎口（６）からの混合気噴出方向に周壁部分（1a）か
ら壁体（７）を延出し、壁体（７）の延出長さl1、及
び、周壁部分（1a）と保炎部形成部材（４）の間隔l
2を、混合気の噴出速度ν1と燃焼速度ν2に対して、 l1／l2≧ν1／ν2 になるように設定し、炎口（６）による長さl3の炎
（F1）を断面形状がほぼ三角形になる状態で形成させ、
炎（F1）の基端（Ａ）を保炎部形成部材（４）にかつ先
端（Ｂ）を壁体（７）に接近させて、混合気の空気比入
を1.8から2.0程度まで増大しても、CO/CO2＜0.005にな
る完全燃焼を炎（F1）のリフトの無い状態で安定維持さ
せ、空気比の増大による低NOx化を図る。The wall (7) extends from the peripheral wall portion (1a) in the direction of the air-fuel mixture ejection from the flame outlet (6), and the extension length l 1 of the wall body (7) and the flame holding with the peripheral wall portion (1a). Spacing l of part forming member (4)
2 is set such that l 1 / l 2 ≧ ν 1 / ν 2 with respect to the injection velocity ν 1 and the combustion velocity ν 2 of the air-fuel mixture, and a flame ( 3 F 1 ) is formed in a state where the cross-sectional shape is almost triangular,
The base end (A) of the flame (F 1 ) is brought close to the flame holding part forming member (4) and the front end (B) is brought close to the wall body (7) to increase the air ratio of the mixture from 1.8 to about 2.0. also, CO / CO 2 <stabilize maintain complete combustion to become 0.005 lift the absence of the flame (F 1), reduce the nO x reduction by increasing the air ratio.
炎（F1）の先端（Ｂ）が位置すべき設定範囲の上限と
下限に位置して、フレームロッドなどの炎検知センサー
（S1），（S2）を壁体（７）に取付け、両炎検知センサ
ー（S1），（S2）からの情報に基づいてガス燃料供給路
（２）の流量調節弁（８）及び燃焼用空気供給路（３）
のダンパー（９）を自動操作する制御器（10）を設け、
炎（F1）の先端（Ｂ）が設定範囲（Ｌ）内に位置するか
否かを自動的に判定して、炎口（６）に供給する空燃混
合気の空気比を自動的に調節し、炎（F1）の先端（Ｂ）
位置を自動的に設定範囲（Ｌ）に維持する。The flame detection sensors (S 1 ) and (S 2 ) such as frame rods are attached to the wall (7) at the upper and lower limits of the setting range where the tip (B) of the flame (F 1 ) should be located. both flame detection sensor (S 1), the gas fuel supply passage on the basis of the information from the (S 2) flow rate control valve (2) (8) and the combustion air supply passage (3)
A controller (10) for automatically operating the damper (9)
It is automatically determined whether or not the tip (B) of the flame (F 1 ) is within the set range (L), and the air ratio of the air-fuel mixture supplied to the flame port (6) is automatically determined. Adjust the tip of the flame (F 1 ) (B)
The position is automatically maintained within the set range (L).
つまり、両炎検知センサー（S1），（S2）により炎
（F1）が検知されると、炎（F1）が長くなったと判定し
て、ガス燃料供給量を微小増大すると共に燃焼用空気供
給量を微小減小して、空気比減小により炎（F1）を短縮
させ、他方、両炎検知センサー（S1），（S2）が炎
（F1）を検知しなくなると、炎（F1）が短くなったと判
定して、ガス燃料供給量を微小減小すると共に燃焼用空
気供給量を微小増大して、空気比増大により炎（F1）が
検知されると、炎（F1）を増長させ、もって、炎口
（６）に近い一方の炎検知センサー（S2）のみが炎
（F1）を検知する状態、換言すれば炎（F1）の先端
（Ｂ）が設定範囲（Ｌ）内に位置する状態を維持する。In other words, when the flame (F 1 ) is detected by both the flame detection sensors (S 1 ) and (S 2 ), it is determined that the flame (F 1 ) has become longer, the gas fuel supply amount is slightly increased, and the combustion is performed. The flame (F 1 ) is shortened by reducing the air supply amount slightly and the air ratio is reduced, while the flame detection sensors (S 1 ) and (S 2 ) do not detect the flame (F 1 ) When the flame (F 1 ) is determined to be short, the gas fuel supply amount is slightly reduced and the combustion air supply amount is slightly increased, and when the flame (F 1 ) is detected due to the increase in the air ratio. The flame (F 1 ) is increased, so that only one flame detection sensor (S 2 ) near the flame outlet (6) detects the flame (F 1 ), in other words, the tip of the flame (F 1 ) (B) is maintained in the set range (L).
次に別の実施例を説明する。 Next, another embodiment will be described.
保炎部形成部材（４）は形状、設置数、配置などにお
いて適宜変更自在であり、例えば第２図に示すように２
個の保炎部形成部材（４）を設けて、保炎部形成部材
（４）どうし間に多孔体（５）により山形の炎（F2）を
形成する炎口（６）を形成してもよい。The flame holding part forming member (4) can be appropriately changed in shape, number of installations, arrangement, and the like. For example, as shown in FIG.
The flame holding part forming members (4) are provided, and a flame opening (6) for forming a chevron flame (F 2 ) by the porous body (5) is formed between the flame holding part forming members (4). Is also good.
炎口（６）を形成するに、保炎形成部材（４）側の炎
口（６）からの噴出速度を壁体（７）側の炎口（６）か
らの噴出速度が小になるように、炎口（６）の径や形状
などを適宜設定してもよい。In forming the flame outlet (6), the ejection speed from the flame outlet (6) on the flame holding forming member (4) side is set so that the ejection speed from the flame outlet (6) on the wall (7) side becomes small. Alternatively, the diameter and shape of the flame outlet (6) may be appropriately set.
壁体（７）を耐熱保温材で形成し、炎（F1）の壁体
（７）への放熱による不安定化を防止してもよい。The wall (7) may be formed of a heat-insulating material to prevent instability due to heat release of the flame (F 1 ) to the wall (7).
炎（F1）の先端（Ｂ）が設定範囲（Ｌ）内に位置する
か否かを自動的に判定するに、公知の各種検知手段を利
用でき、また、その検知手段に連係する制御器（10）の
具体構成も適当に変更でき、例えばガス燃料供給量と燃
焼用空気供給量の一方のみを調節するものでもよい。In order to automatically determine whether or not the tip (B) of the flame (F 1 ) is within the set range (L), various known detection means can be used, and a controller associated with the detection means can be used. The specific configuration of (10) can also be appropriately changed. For example, only one of the gas fuel supply amount and the combustion air supply amount may be adjusted.
炎（F1）の先端位置判定及び空燃比調節による炎
（F1）の長さ維持を人為的に実行してもよい。Flame (F 1) the length of the tip position determination and the air-fuel ratio control by the flame (F 1) maintaining may be artificially execute the.
ガス燃料の種類、空気比（≧１）、バーナの用途など
は不問である。The type of gas fuel, the air ratio (≧ 1), the use of the burner, etc. are not questionable.
尚、特許請求の範囲の項に図面との対照を便利にする
為に符号を記すが、該記入により本発明は添付図面の構
造に限定されるものではない。In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the structure shown in the attached drawings.
第１図は本発明の実施例を示すバーナ概念図、第２図は
本発明の別実施例を示すバーナ概念図である。 第３図（イ），（ロ）は従来例のバーナ概念図である。 第４図は空気比入とNO2の濃度の相関を示すグラフであ
る。 （１）……バーナケース、（1a）……周壁部分、（４）
……保炎部形成部材、（６）……炎口、（17）……壁
体、（Ａ）……炎基端、（Ｂ）……炎先端、（F1）……
炎、（Ｌ）……設定範囲。FIG. 1 is a conceptual diagram of a burner showing an embodiment of the present invention, and FIG. 2 is a conceptual diagram of a burner showing another embodiment of the present invention. FIGS. 3A and 3B are conceptual diagrams of a conventional burner. FIG. 4 is a graph showing the correlation between the air ratio and the NO 2 concentration. (1) ... burner case, (1a) ... peripheral wall part, (4)
...... flame holding portion forming member, (6) ... flame hole, (17) ... wall, (A) ... Honoomototan, (B) ...... flame tip, (F 1) ...
Flame, (L) ... Setting range.
Claims (1)
炎部形成部材（４）との間に形成した炎口（６）におい
て、ガス燃料と理論空気量以上の燃焼用空気との混合気
を噴出させて燃焼させる方法であって、 前記炎口（６）からの混合気噴出方向に前記周壁部分
（1a）から延出した壁体（７）の延出長さl1、前記周壁
部分（1a）と前記保炎部形成部材（４）の間隔l2を、混
合気の噴出速度ν1と燃焼速度ν2に対して、 l1／l2≧ν1／ν2 になるように設定して、 前記炎口（６）による炎（F1）を、基端（Ａ）が前記保
炎部形成部材（４）に接近すると共に先端（Ｂ）が前記
壁体（７）に接近する状態で、かつ、断面形状がほぼ三
角形になる状態で形成させ、 前記炎口（６）による炎（F1）の先端（Ｂ）が設定範囲
（Ｌ）内に位置するか否かを判定して、空気比減小によ
る炎（F1）の短縮及び空気比増大による炎（F1）の増長
により炎（F1）の先端（Ｂ）の位置を設定範囲（Ｌ）内
に維持するように、前記炎口（６）に供給する空燃混合
気の空気比を調節するガス燃料の全一次空気式燃焼法。1. A flame port (6) formed between a peripheral wall portion (1a) of a burner case (1) and a flame holding part forming member (4), and a gas fuel and combustion air having a theoretical air amount or more. A method of jetting the air-fuel mixture and burning it, wherein an extension length l 1 of a wall body (7) extending from the peripheral wall portion (1a) in the air-fuel mixture jetting direction from the flame port (6); The distance l 2 between the peripheral wall portion (1a) and the flame holding part forming member (4) is set to l 1 / l 2 ≧ ν 1 / ν 2 with respect to the air-jet velocity ν 1 and the combustion velocity ν 2 . The flame (F 1 ) of the flame outlet (6) is set so that the base end (A) approaches the flame holding part forming member (4), and the front end (B) moves the wall (7). ) And in a state where the cross-sectional shape is substantially triangular, and whether the tip (B) of the flame (F 1 ) by the flame port (6) is located within the set range (L) or not. Or Determination to sustain the shortening and length increasing by flame (F 1) located a set range of the tip (B) of (L) in the flame (F 1) by increasing the air ratio of the flame (F 1) with air fell small So that the air ratio of the air-fuel mixture supplied to the flame port (6) is adjusted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33684089A JP2741933B2 (en) | 1989-12-25 | 1989-12-25 | All-primary pneumatic combustion of gas fuel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33684089A JP2741933B2 (en) | 1989-12-25 | 1989-12-25 | All-primary pneumatic combustion of gas fuel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03195805A JPH03195805A (en) | 1991-08-27 |
| JP2741933B2 true JP2741933B2 (en) | 1998-04-22 |
Family
ID=18303147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33684089A Expired - Lifetime JP2741933B2 (en) | 1989-12-25 | 1989-12-25 | All-primary pneumatic combustion of gas fuel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2741933B2 (en) |
-
1989
- 1989-12-25 JP JP33684089A patent/JP2741933B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03195805A (en) | 1991-08-27 |
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