JPS589041Y2 - combustion device - Google Patents
combustion deviceInfo
- Publication number
- JPS589041Y2 JPS589041Y2 JP202877U JP202877U JPS589041Y2 JP S589041 Y2 JPS589041 Y2 JP S589041Y2 JP 202877 U JP202877 U JP 202877U JP 202877 U JP202877 U JP 202877U JP S589041 Y2 JPS589041 Y2 JP S589041Y2
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- combustion
- air
- radiant tube
- disk
- 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
Landscapes
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
- Gas Burners (AREA)
Description
【考案の詳細な説明】
本考案は、たとえばラジアントチューブのような細長い
燃焼室に好適な燃焼装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a combustion device suitable for elongated combustion chambers such as radiant tubes.
従来のラジアントチューブにおいては燃料と燃焼用空気
とが該チューブのはじめの部分において高温な火炎とな
って燃焼し、従って細長いチューブの末端においては火
力が衰えて低温となってしまう欠点があった。Conventional radiant tubes have the disadvantage that the fuel and combustion air burn as a high-temperature flame at the beginning of the tube, and therefore the firepower decreases and the temperature becomes low at the end of the elongated tube.
本考案の燃焼装置においては、ラジアントチューブの首
部位置にトいて燃料督よび/または空気をパルス式に連
発式に供給するためラジアントチューブのはじめの部分
では非理論空気比の状態で燃焼が開始され−ぺんに高温
な火炎となって燃料が燃焼し尽されないようにし、未燃
の燃料はチューブの後の部分にかいて燃焼ガス中で酸素
と結合して徐々に燃焼が行なわれるようにし、従って細
長いラジアントチューブの全長に亘って燃焼が行なわれ
、−見長い火炎が形成されたごとくになり、この長い火
炎は特に著しるしく高温な部分が発生せずチューブ全長
に亘ってはマ均一な温度で燃焼せしめることができるか
ら、該ラジアントチューブを一様に赤熱せしめることが
できる。In the combustion device of the present invention, since fuel is supplied to the neck of the radiant tube and/or air is supplied in a pulsed manner repeatedly, combustion is started at a non-stoichiometric air ratio at the beginning of the radiant tube. - to prevent the fuel from being completely burned out by creating a hot flame; unburnt fuel is poured into the rear part of the tube to combine with oxygen in the combustion gas and to cause gradual combustion; Combustion takes place over the entire length of the long, thin radiant tube, creating the appearance of a long flame.This long flame has a uniform temperature throughout the length of the tube, with no particularly hot parts. Since the radiant tube can be combusted at a constant temperature, the radiant tube can be uniformly red-hot.
またこのような燃焼の結果排ガス中のNOx量を著しる
しく低減せしめることができる。Further, as a result of such combustion, the amount of NOx in the exhaust gas can be significantly reduced.
本考案の燃焼装置の構造をその一実施例を示す第1図、
第5図、第6図によって説明する。FIG. 1 shows an embodiment of the structure of the combustion device of the present invention;
This will be explained with reference to FIGS. 5 and 6.
第1図において、1は炉壁であり、2は全長が約5m程
度のU字型ラジアントチューブである。In FIG. 1, 1 is a furnace wall, and 2 is a U-shaped radiant tube with a total length of about 5 m.
該ラジアントチューブの首部には燃料噴出口3と空気噴
出口4とパイロットバーナ5とが設けられている。A fuel nozzle 3, an air nozzle 4, and a pilot burner 5 are provided at the neck of the radiant tube.
該ラジアントチューブの末尾6は燃焼ガス管7と連続し
てかり、該燃焼ガス管は炉壁1を通って外側に取出され
、熱交換器8を通り、排気管10に連続しているから、
燃焼ガスは該熱交換器にかいて燃焼用空気供給管9から
供給される空気と熱交換をした後に排気される。The tail 6 of the radiant tube is continuous with the combustion gas pipe 7, which is taken out to the outside through the furnace wall 1, passes through the heat exchanger 8, and is continuous with the exhaust pipe 10.
The combustion gas is exhausted after exchanging heat with the air supplied from the combustion air supply pipe 9 through the heat exchanger.
本考案者はさきに燃料供給管11に電磁パルプを設け、
該電磁バルブは電源からのパルス電流によって頻繁に開
閉せられ、従って燃料噴出口3からの燃料の供給は、第
2図、第3図に示すようにパルス式の供給となる燃焼方
法を発明している。The inventor first installed electromagnetic pulp in the fuel supply pipe 11,
The electromagnetic valve is frequently opened and closed by a pulsed current from a power source, and therefore the fuel is supplied from the fuel injection port 3 in a pulsed manner as shown in FIGS. 2 and 3. ing.
この燃焼方法にかいては燃料噴出口からの燃料供給は、
たとえば0.2秒をサイクルとするパルス式の供給とな
り、燃料濃度が濃い供給Aが0.1秒間あった後に燃料
濃度が零Bあるいは燃料濃度がうすい供給Cがo、i秒
間続く繰返しめ間歇供給である。In this combustion method, the fuel supply from the fuel nozzle is as follows:
For example, the supply is a pulse type with a cycle of 0.2 seconds, and after 0.1 seconds of supply A with high fuel concentration, B with zero fuel concentration or supply C with low fuel concentration continues for o and i seconds. It's supply.
燃料濃度の濃い燃料のかたまり的な供給においては周囲
の燃焼用空気がなかなか燃料のかた1りの中心部に達し
難いため、ラジアントチューブのはじめの部分において
燃料と空気の混合と燃焼は、空気過剰の状態で燃料のか
たまりの外周部においてのみ行なわれ、燃焼は徐々に開
始される。When a lump of fuel is supplied with a high concentration of fuel, it is difficult for the surrounding combustion air to reach the center of the fuel lump, so the mixing and combustion of fuel and air at the beginning of the radiant tube is difficult due to excess air. In this state, combustion occurs only at the outer periphery of the fuel mass, and combustion begins gradually.
従ってこのような燃料供給によって従来グラフアントチ
ューブのはじめの部分で燃料全量が−ぺんに高温で燃焼
してしまうことを防止することができる。Therefore, by supplying fuel in this manner, it is possible to prevent the entire amount of fuel from burning at a high temperature at the beginning of the conventional graft tube.
残存の未燃の燃料は、ラジアントチューブのあとの部分
で燃焼ガス中で空気と徐々に混合しながら燃焼する。The remaining unburnt fuel is burned in the combustion gas after the radiant tube while gradually mixing with air.
第4図に示すようにこの細長いラジアントチューブのさ
きの部分においては火炎は連発的なかたまりとなって流
れるが、會\あとの部分に至れば前後の連発火炎が連結
して連続した火炎となって流れる。As shown in Figure 4, at the beginning of this long and narrow radiant tube, the flames flow as a continuous mass, but when they reach the end of the tube, the preceding and succeeding flames connect to form a continuous flame. It flows.
従来のラジアントチューブにおいてはラジアントチュー
ブのさき部分にむいて燃料が高温部を作って旺盛に燃焼
し、従ってラジアントチューブのあとの部分では火力が
衰える傾向があって、火炎をラジアントチューブ内で長
くするために種々の対策がとられていた。In conventional radiant tubes, the fuel creates a high-temperature zone towards the end of the radiant tube and burns vigorously, and therefore the firepower tends to decline in the rear part of the radiant tube, making the flame longer inside the radiant tube. Various measures have been taken for this purpose.
この発明の燃焼方法においては単に燃料のパルス供給装
置を設けるだけでラジアントチューブ全長に亘り均一な
温度の長い火炎とすることができる。In the combustion method of the present invention, a long flame with a uniform temperature can be produced over the entire length of the radiant tube simply by providing a fuel pulse supply device.
しかしながらこの発明の実施においては燃料供給管11
に電磁パルプを設けて該電磁パルプを要求に応じ毎秒数
回ないし数十回の頻度で開閉しなければならず、またた
とえ電磁パルプの代りに自動車のポペット弁式にして純
機械的に開閉作動をするとしても、その耐用年数や確実
性が心配である。However, in carrying out this invention, the fuel supply pipe 11
The electromagnetic pulp must be opened and closed several to several dozen times per second according to demand, and even if an automobile poppet valve is used instead of the electromagnetic pulp, the opening and closing operation is purely mechanical. Even if we do, there are concerns about its useful life and reliability.
本考案の燃焼装置は、第5図、第6図に示す燃焼側から
見たラジアントチューブの拡大正面図に釦いて、ラジア
ントチューブ2首端の燃料供給管11の先端面には周囲
部に4個の燃料噴出孔3を設けているが該燃料供給管内
に該噴出孔に近接せしめて先端面の内側に、点線で示す
ように周囲に孔または切欠を有するディスク12を先端
面と近接せしめて設ける。The combustion device of the present invention is shown in the enlarged front view of the radiant tube seen from the combustion side shown in FIGS. A number of fuel injection holes 3 are provided in the fuel supply pipe, and a disk 12 having holes or notches around the periphery is placed close to the tip surface, as shown by the dotted line, on the inner side of the tip surface and close to the injection holes. establish.
該ディスクは第1図に示すように軸13を有していて該
軸はモータ14で機械的に回転せしめられ、従って燃料
は各噴出口3からパルス的に従って燃料がかたまりとな
って連発的に供給される燃焼装置である。The disk has a shaft 13 as shown in FIG. 1, and the shaft is mechanically rotated by a motor 14, so that the fuel flows out of each jet port 3 in pulses in a continuous manner in the form of clumps. This is the combustion equipment supplied.
上記第1図、第5図、第6図に示す燃焼装置は燃料がパ
ルス的に連発的に供給されるものを示したが、同様の効
果は空気供給をパルス的に連発的に行っても得られ、ま
た燃料と空気を交互にパルス的に連発的に供給するよう
にしても得られる。Although the combustion devices shown in Figures 1, 5, and 6 above are ones in which fuel is supplied in a continuous pulse manner, the same effect can be obtained even if air is supplied in a continuous pulse manner. It can also be obtained by alternately supplying fuel and air in pulses.
第7図、第8図は空気をパルス式に連発的に供給する本
考案に係る燃焼装置を示す拡大図である。FIGS. 7 and 8 are enlarged views showing a combustion device according to the present invention that continuously supplies air in a pulsed manner.
第9図、第10図は燃料と空気をいづれも交互にパルス
式に連発的に供給する本考案に係る燃焼装置を示す拡大
図である。FIGS. 9 and 10 are enlarged views showing a combustion device according to the present invention that alternately supplies both fuel and air in a pulsed manner.
第7図、第8固転よび第9図、第10図の場合はディス
ク12は燃料供給管11の先端面の外側に従って第8図
、第10図に釦いては実線で示すように、先端面と近接
せしめて設ける。In the case of FIGS. 7 and 8, and in the case of FIGS. 9 and 10, the disk 12 is moved along the outside of the tip surface of the fuel supply pipe 11, as shown by the solid line in FIGS. 8 and 10. Provided close to the surface.
該ディスクの軸13は燃料供給管11の先端面を貫通せ
しめ燃料供給管11内を通し、図示しないモータによっ
て回転せしめる。The shaft 13 of the disk passes through the distal end surface of the fuel supply pipe 11, passes through the inside of the fuel supply pipe 11, and is rotated by a motor (not shown).
本考案の燃焼装置においては従来の燃焼装置に極めて簡
単な機械的なディスクの回転手段を設けることによって
確実に、かつ耐久的に燃料および/または空気のパルス
供給p1可能となり、これによって細長い燃焼室である
ラジアントチューブに釦いて全長に亘りはマ均一な温度
にすることができ、またNOx発生量も大巾に減少せし
めることができ、また単にラジアントチューブだけでな
く一般の燃焼炉にも適用させてNOxの低減を図ること
ができる。In the combustion device of the present invention, by providing an extremely simple mechanical disc rotation means in the conventional combustion device, it is possible to reliably and durablely supply pulses of fuel and/or air p1 to the elongated combustion chamber. It is possible to maintain a uniform temperature over the entire length of the radiant tube, and the amount of NOx generated can be greatly reduced, and it can be applied not only to radiant tubes but also to general combustion furnaces. This makes it possible to reduce NOx.
第1図は本考案に係る燃焼装置をラジアントチューブに
取付けた側面図、第2図、第3図は燃料のパルス供給を
横軸に時間をとって示したグラフ。
第4図はラジアントチューブ内の燃焼状態を示す図、第
5図、第6図は燃料をパルス式に連発的に供給する本考
案の燃焼装置を燃焼側より見た拡大正面図、第7図、第
8図は空気をパルス式に連発的に供給する本考案に係る
燃焼装置の拡大側断面図と燃焼側より見た拡大正面図、
第9図、第10図は燃料と空気ないづれも交互にパルス
式に連発的に供給する本考案に係る燃焼装置の拡大側断
面図と燃焼側より見た拡大正面図である。
1は炉壁、2はラジアントチューブ、3は燃料噴出口、
4は空気噴出口、5はパイロットバーナ、11は燃料供
給管、12はディスク、13は軸、14はモータ。FIG. 1 is a side view of a combustion device according to the present invention attached to a radiant tube, and FIGS. 2 and 3 are graphs showing fuel pulse supply over time on the horizontal axis. Figure 4 is a diagram showing the combustion state inside the radiant tube, Figures 5 and 6 are an enlarged front view of the combustion device of the present invention that continuously supplies fuel in a pulsed manner, as seen from the combustion side, and Figure 7. , FIG. 8 is an enlarged side sectional view and an enlarged front view seen from the combustion side of a combustion device according to the present invention that continuously supplies air in a pulsed manner.
FIGS. 9 and 10 are an enlarged side sectional view and an enlarged front view as seen from the combustion side of a combustion apparatus according to the present invention which alternately supplies both fuel and air in a pulsed manner. 1 is the furnace wall, 2 is the radiant tube, 3 is the fuel injection port,
4 is an air jet nozzle, 5 is a pilot burner, 11 is a fuel supply pipe, 12 is a disk, 13 is a shaft, and 14 is a motor.
Claims (1)
出口を有する熱焼装置に釦いて、該燃料噴出口および/
または空気噴出口に近接せしめてその手前側位置または
先方側位置に周囲に1(11tたは数個の孔または切欠
を有するディスクを設け、該ディスクの回転手段を設け
て該ディスクの孔または切欠による燃料噴出口および/
または空気噴出口の開閉によって燃料釦よび/または空
気をパルス式に供給する構造が特徴である燃焼装置。A thermal sintering device having one or several fuel nozzles and one or several air nozzles is pressed, and the fuel nozzles and/or
Alternatively, a disk having 1 (11t) or several holes or notches is provided around the air outlet at a position in front of or on the front side of the air outlet, and a means for rotating the disk is provided, and the holes or notches in the disk are provided. Fuel outlet and/or
Or a combustion device characterized by a structure that supplies a fuel button and/or air in a pulsed manner by opening and closing an air jet port.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP202877U JPS589041Y2 (en) | 1977-01-13 | 1977-01-13 | combustion device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP202877U JPS589041Y2 (en) | 1977-01-13 | 1977-01-13 | combustion device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5397741U JPS5397741U (en) | 1978-08-08 |
JPS589041Y2 true JPS589041Y2 (en) | 1983-02-18 |
Family
ID=28689050
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP202877U Expired JPS589041Y2 (en) | 1977-01-13 | 1977-01-13 | combustion device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS589041Y2 (en) |
-
1977
- 1977-01-13 JP JP202877U patent/JPS589041Y2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5397741U (en) | 1978-08-08 |
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