JPH04177006A - Collision combustion device - Google Patents
Collision combustion deviceInfo
- Publication number
- JPH04177006A JPH04177006A JP2305400A JP30540090A JPH04177006A JP H04177006 A JPH04177006 A JP H04177006A JP 2305400 A JP2305400 A JP 2305400A JP 30540090 A JP30540090 A JP 30540090A JP H04177006 A JPH04177006 A JP H04177006A
- Authority
- JP
- Japan
- Prior art keywords
- combustion
- combustion chamber
- gas
- air
- collision
- 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.)
- Pending
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 111
- 239000007789 gas Substances 0.000 claims abstract description 25
- 239000002737 fuel gas Substances 0.000 claims abstract description 19
- 239000000446 fuel Substances 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 239000000567 combustion gas Substances 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 5
- 238000009792 diffusion process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 239000003779 heat-resistant material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Pre-Mixing And Non-Premixing Gas Burner (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は空気流と両側から衝突させ、その衝突空間にガ
ス燃料を供給して燃焼を行う衝突燃焼装置に関する。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an impingement combustion device that collides with airflow from both sides and supplies gaseous fuel to the collision space to perform combustion.
〈従来技術とその課題〉
従来、ガス燃料による連続燃焼器ではブンゼン燃焼によ
るものが主流であり、一部で予混合燃焼が実用されてい
る。一方、拡散燃焼による家庭用燃焼器の実用例はほと
んどない。<Prior art and its problems> Conventionally, Bunsen combustion has been the mainstream in continuous combustors using gas fuel, and premix combustion has been put into practice in some cases. On the other hand, there are almost no practical examples of household combustors using diffusion combustion.
上記ブンゼン燃焼では、高温の内炎の後流で高濃度のN
O,が生成されるため、低NoX燃焼器の実現は困難で
ある。また二次燃焼のための空間が大きく必要であるた
め、高負荷燃焼の実現も困難である。In the Bunsen combustion described above, a high concentration of N is generated in the wake of the high-temperature inner flame.
Since O, is generated, it is difficult to realize a low NoX combustor. Furthermore, since a large space is required for secondary combustion, it is difficult to achieve high-load combustion.
一方、排気中のNOx低減の手段として、希薄混合気で
の予混合燃焼が有効であるが、火炎が吹き飛びやすく、
燃焼量が制約される欠点がある。また予混合燃焼では火
炎の安定範囲が狭く、実用燃焼器においては火炎の安定
範囲を広(するための燃焼器構造は一般に複雑となる。On the other hand, premix combustion with a lean mixture is effective as a means of reducing NOx in exhaust gas, but flames tend to blow out easily.
The disadvantage is that the amount of combustion is limited. Furthermore, in premixed combustion, the flame stability range is narrow, and in practical combustors, the combustor structure to widen the flame stability range is generally complex.
また一部の業務用の大型燃焼器では、排ガスの一部を燃
焼用空気に混合する排ガス再循環(E、G。In addition, some large commercial combustors use exhaust gas recirculation (E, G), which mixes a portion of the exhaust gas with combustion air.
R)によりN低の低減が図られているが、装置が複雑で
高価となり、家庭用燃焼器への適用は困難である。R) has been attempted to reduce N low, but the device is complicated and expensive, making it difficult to apply to household combustors.
そこで本発明は上記従来技術の欠点を解消し、g−NO
Xで且つ高負荷燃焼を実現でき、家庭用の連続燃焼器と
しても好適な新しい衝突燃焼装置の提供を目的とする。Therefore, the present invention eliminates the drawbacks of the above-mentioned prior art and
The purpose of the present invention is to provide a new impingement combustion device that can realize X and high-load combustion and is suitable as a continuous combustor for home use.
〈課題を解決するための手段〉
上記目的を達成するため、本発明の衝突燃焼装置は、比
較的短い距離を隔てて水平方向に対向して設けられた複
数対の衝突空気噴出孔、及び該対の衝突空気噴出孔から
噴出せられる空気の衝突点に向けて下方から垂直方向に
ガス燃料を噴出させる複数の燃料ガス噴出孔とを設けた
下部燃焼室と、該下部燃焼室の上方に連続的に拡大して
設けられる上部燃焼室とを有し、且つ上部燃焼室内には
前記下部燃焼室からの上昇流を擾乱する邪魔板を設けた
ことを特徴としている。<Means for Solving the Problems> In order to achieve the above object, the impingement combustion device of the present invention includes a plurality of pairs of impingement air nozzles provided horizontally opposite each other at a relatively short distance; A lower combustion chamber is provided with a plurality of fuel gas injection holes that eject gas fuel vertically from below toward a collision point of air ejected from a pair of collision air injection holes, and a lower combustion chamber that is continuous above the lower combustion chamber. The combustion chamber is characterized in that it has an upper combustion chamber that is enlarged in size, and that a baffle plate is provided in the upper combustion chamber to disturb the upward flow from the lower combustion chamber.
〈作用〉
対向した衝突空気噴出孔からそれぞれ噴出した空気は下
部燃焼室内で衝突し、強い擾乱を生しる。この衝突空間
に下方から燃料ガスが噴出供給され、着火されることに
より、空気とガス燃料はごく短時間で混合し、強い擾乱
の下で燃焼が急激に進行する。が対向する衝突空気噴出
孔の距離が比較的短いことから、前記衝突空間も狭く、
下部燃焼室内で燃焼は完結しない。この反応(燃焼)途
中の燃焼ガスは上昇流となって上部燃焼室に入り、そこ
で邪魔板によって再び強く擾乱される。この擾乱によっ
て既燃ガスと未燃ガスの混合が促進され、また上部燃焼
室内にガスが広がって、燃焼が完結する。<Operation> The air ejected from the opposing collision air nozzles collides in the lower combustion chamber, producing strong disturbance. Fuel gas is ejected from below into this collision space and ignited, so that air and gaseous fuel are mixed in a very short time, and combustion rapidly progresses under strong disturbance. Since the distance between the opposing collision air nozzles is relatively short, the collision space is also narrow.
Combustion is not completed within the lower combustion chamber. The combustion gas in the middle of this reaction (combustion) becomes an upward flow and enters the upper combustion chamber, where it is again strongly disturbed by the baffle plate. This disturbance promotes the mixing of burnt gas and unburnt gas, and the gas spreads into the upper combustion chamber to complete combustion.
空気と燃料ガスが下部燃焼室で十分効果的に混合され、
また燃焼途中のガスが上部燃焼室内で十分効果的に混合
されるので、燃焼に必要な燃焼室容積が小さくてすみ、
高負荷燃焼を達成できる。Air and fuel gas are mixed effectively in the lower combustion chamber,
In addition, the gases in the middle of combustion are mixed effectively in the upper combustion chamber, so the volume of the combustion chamber required for combustion is small.
High-load combustion can be achieved.
また上部燃焼室内で邪魔板によって既燃ガスと未燃ガス
の混合燃焼が活発に行われるので、排ガス再循環(E、
G、R)効果により、NoXを低くすることができる。In addition, the baffle plate in the upper combustion chamber actively mixes and burns the burnt gas and unburnt gas, so exhaust gas recirculation (E,
G, R) effects can lower NoX.
〈実施例〉
第1図は本発明装置の実施例を示す一部断面斜視図、第
2図は燃焼室の断面図、第3図は衝突空気噴出孔の他の
形状例を示す図、第4図(八)、(B)はそれぞれ衝突
空気噴出孔の配列例を示す図、第5図はあまり好ましく
ない衝突空気噴出孔の例を示す断面図である。<Example> Fig. 1 is a partially sectional perspective view showing an embodiment of the device of the present invention, Fig. 2 is a sectional view of a combustion chamber, Fig. 3 is a view showing another example of the shape of the collision air nozzle, and Fig. FIGS. 4(8) and 4(B) are diagrams each showing an example of the arrangement of the collision air nozzles, and FIG. 5 is a sectional view showing an example of the collision air nozzles, which is not very preferable.
燃焼缶体10内の下部に下部燃焼室20が設けられ、燃
焼缶体10内の中間部に上部燃焼室30が設けられ、上
部に排気部40が設けられている。A lower combustion chamber 20 is provided in the lower part of the combustion can body 10, an upper combustion chamber 30 is provided in the middle part of the combustion can body 10, and an exhaust part 40 is provided in the upper part.
前記燃焼缶体10内の下部に設けられる下部燃焼室20
は水平方向の細長い空間からなり、比較的短い距離であ
る一定距離り、を隔てて対向する長方方向の画壁2工、
21に、それぞれ水平方向に対向する複数対の衝突空気
噴出孔22.22が設けられている。23.23はそれ
ぞれ燃焼用空気供給管である。a lower combustion chamber 20 provided at the lower part of the combustion can body 10;
consists of a long and narrow space in the horizontal direction, with two walls facing each other across a relatively short distance,
21 are provided with a plurality of pairs of impingement air outlets 22, 22, each horizontally opposed. 23 and 23 are combustion air supply pipes, respectively.
また下部燃焼室20の底壁24には複数の燃料ガス噴出
孔25が、前記各衝突空気噴出孔22.22対からの噴
出空気の空気衝突点27に向けて垂直方向に開口して設
けられている。26は燃料ガス供給管である。なお上記
において、比較的短い距離というのは、その距離内に構
成される空気衝突点27を含む衝突空間が比較的狭く、
供給された燃料ガスの燃焼がその衝突空間では完結しな
いということを意味する。Further, a plurality of fuel gas injection holes 25 are provided in the bottom wall 24 of the lower combustion chamber 20 and open vertically toward the air collision point 27 of the air ejected from each of the collision air injection holes 22.22 pairs. ing. 26 is a fuel gas supply pipe. Note that in the above, a relatively short distance means that the collision space including the air collision point 27 configured within that distance is relatively narrow.
This means that the combustion of the supplied fuel gas is not completed in the collision space.
前記衝突空気噴出孔22の形状は、第1図に示す丸孔の
他、第3図に示すスリット状孔、その他の形状が可能で
ある。また衝突空気噴出孔22は、第1図に示すような
単列の他、第4図(A)、(B)に示す如き2列、或い
は他の複数列としてもよい。The shape of the collision air ejection hole 22 may be a round hole shown in FIG. 1, a slit-like hole shown in FIG. 3, or other shapes. Further, the collision air ejection holes 22 may be arranged in a single row as shown in FIG. 1, or in two rows as shown in FIGS. 4(A) and 4(B), or in other plural rows.
前記上部燃焼室30は、前記下部燃焼室20の空気衝突
点27の直上付近から緩やかに連続的に拡大して、幅L
2を持った比較的広い空間に構成されている。そして上
部燃焼室30には前記空気衝突点27の上方に位置して
邪魔板31が設けられている。該邪魔板31は耐熱材料
若しくは水冷した金属製とする。なお上記において比較
的広い空間というのは、その空間内で燃焼が完結できる
広さをいうものとする。The upper combustion chamber 30 gradually and continuously expands from the vicinity of the air collision point 27 of the lower combustion chamber 20 to a width L.
It is composed of a relatively large space with 2 spaces. A baffle plate 31 is provided in the upper combustion chamber 30 above the air collision point 27. The baffle plate 31 is made of a heat-resistant material or water-cooled metal. Note that in the above, a relatively wide space refers to a space that allows combustion to be completed within that space.
上記燃焼室30の上部に水管32を配した熱交換器33
が設けられる。また前記排気部40には消音材41が配
されている。A heat exchanger 33 with a water pipe 32 arranged above the combustion chamber 30
will be provided. Further, a sound deadening material 41 is arranged in the exhaust section 40.
次に本装置による燃焼の動作、作用を説明する。運転中
、対向する衝突空気噴出孔22.22から燃焼速度の数
倍の速度で燃焼用空気が同速で噴出せられ、また燃料ガ
ス噴出孔25から燃料ガスが噴出せられる。両側はぼ同
速で噴出した燃焼用空気は下部燃焼室20の中央で衝突
し、空気衝突点27を中心に強い擾乱状態からなる衝突
空間を形成する。Next, the combustion operation and effect of this device will be explained. During operation, combustion air is ejected from the opposing impingement air ejection holes 22, 22 at a speed several times the combustion speed, and fuel gas is ejected from the fuel gas ejection holes 25. The combustion air ejected from both sides at approximately the same speed collides at the center of the lower combustion chamber 20, forming a collision space consisting of a strong disturbance state around the air collision point 27.
そして前記空気衝突点27に向けて噴出された燃料ガス
は前記衝突空間で短時間で急速に燃焼用空気と混合せら
れる。その結果、擾乱の下で燃焼が急激に進行する。し
かし対向する衝突空気噴出孔22間の距離L1が比較的
短いことから、衝突空間も狭く、下部燃焼室20では燃
焼は完結しない。反応途中の燃料ガスは、下部燃焼室2
0から上昇流となって上部燃焼室30に入り、そこで再
び邪魔板31によって流れを妨害され、強く擾乱される
。この擾乱によって、下からの反応途中の燃焼ガスと上
部燃焼室30で燃焼が完結した既燃ガスとが速やかに混
合しながら、上部燃焼室30全体に広がって燃焼を完結
する。燃焼完結したガスは上部燃焼室30の上部で熱交
換器33によって熱交換された後、排気部40から排出
される。The fuel gas ejected toward the air collision point 27 is rapidly mixed with combustion air in the collision space in a short period of time. As a result, combustion progresses rapidly under disturbance. However, since the distance L1 between the opposing collision air nozzles 22 is relatively short, the collision space is also narrow, and combustion is not completed in the lower combustion chamber 20. The fuel gas in the middle of the reaction is transferred to the lower combustion chamber 2.
0 and enters the upper combustion chamber 30, where the flow is again blocked by the baffle plate 31 and is strongly disturbed. Due to this disturbance, the combustion gas in the middle of reaction from below and the burnt gas whose combustion has been completed in the upper combustion chamber 30 quickly mix and spread throughout the upper combustion chamber 30 to complete combustion. After the combustion has been completed, the gas is heat exchanged in the upper part of the upper combustion chamber 30 by the heat exchanger 33, and then is discharged from the exhaust section 40.
前記邪魔板31の形状は下側が凹になっているのが好ま
しい。下側が凹になっていることにより、下部燃焼室2
0からの上昇流が邪魔板31に当たって、下向きの流れ
を生し、既燃ガスとの混合、擾乱効果が大きいからであ
る。なお邪魔板31がないと、下部燃焼室20からの上
昇流が上部燃焼室30の中央を素早く通過し、燃焼がう
まく完結しない。It is preferable that the shape of the baffle plate 31 is concave on the lower side. Because the lower side is concave, the lower combustion chamber 2
This is because the upward flow from 0 hits the baffle plate 31 and produces a downward flow, which mixes with the burnt gas and has a large disturbance effect. Note that without the baffle plate 31, the upward flow from the lower combustion chamber 20 would quickly pass through the center of the upper combustion chamber 30, and combustion would not be completed successfully.
また前記下部燃焼室20に設けられる衝突空気噴出孔2
2は壁21より内部へ突出しないのが好ましい。そのよ
うにすることで、火炎が衝突空気噴出孔22に保炎する
ことなく、空気衝突点27付近の空間に安定して保持さ
れる。第5図に示す如く衝突空気噴出孔28が下部燃焼
室内へ突出した構成では、その突出した部分が加熱され
るため耐久性が劣る。また突出した衝突空気噴出孔28
部分に火炎が保持されやすく、乱れの効果が減少する。Further, collision air nozzle 2 provided in the lower combustion chamber 20
2 preferably does not protrude inward from the wall 21. By doing so, the flame is stably held in the space near the air collision point 27 without being held in the collision air outlet 22. In the configuration in which the collision air nozzle 28 protrudes into the lower combustion chamber as shown in FIG. 5, the protruding portion is heated, resulting in poor durability. Also, a protruding collision air outlet 28
The flame is more likely to be retained in the area, reducing the effect of turbulence.
その他、実施例では燃焼用空気からなる衝突空間に燃料
ガスを供給する衝突拡散燃焼器としたが、衝突空気に予
め燃料ガスを混合する予混合衝突燃焼器とすることも可
能である。In addition, in the embodiment, a collision diffusion combustor is used that supplies fuel gas to a collision space made of combustion air, but it is also possible to use a premix collision combustor that mixes fuel gas with collision air in advance.
〈効果〉
本発明は以上の構成、作用よりなり、請求項1に記載の
衝突燃焼装置によれば、下部燃焼室内での強い擾乱下で
の空気と燃料ガスとの急速な混合、及び上部燃焼室内で
の邪魔板による未燃ガスと既燃ガスとの効果的な混合を
達成できるので、全体として小さな燃焼室で大きな出力
を出すことができ、高負荷燃焼を実現できる。<Effects> The present invention has the above configuration and operation, and according to the impingement combustion apparatus according to claim 1, rapid mixing of air and fuel gas under strong disturbance in the lower combustion chamber and upper combustion are achieved. Since it is possible to achieve effective mixing of unburned gas and burnt gas using the baffle plate in the room, a large output can be produced with a small combustion chamber as a whole, and high-load combustion can be achieved.
また上記燃焼室内で未燃ガスと既燃ガスの効果的な混合
燃焼が達成できるので、特別な外部付加装置等を用いる
ことなく 、NO,t1度を十分低減することができる
。Furthermore, since effective mixed combustion of unburned gas and burnt gas can be achieved in the combustion chamber, NO and t1 degrees can be sufficiently reduced without using any special external additional equipment.
拡散燃焼器では一般に燃焼室負荷が小さいが、本発明装
置では、拡散燃焼器であっても家庭用燃焼器としては高
負荷の2 X 10’kcal/m’h程度が可能とな
る。またNOつの排出量は空気過剰率1.2において2
5ppmと従来の一般的なブンゼン燃焼器の1/4以下
であり、高価な排ガス再循環装置を用いることなく低N
oXが実現できる。Diffusion combustors generally have a small combustion chamber load, but in the device of the present invention, even a diffusion combustor can achieve a high load of about 2 x 10'kcal/m'h as a household combustor. Also, the amount of NO emissions is 2 at an excess air ratio of 1.2.
5ppm, which is less than 1/4 of that of a conventional general Bunsen combustor, and it is possible to achieve low N without using an expensive exhaust gas recirculation device.
oX can be realized.
第1図は本発明装置の実施例を示す一部断面斜視図、第
2図は燃焼室の断面図、第3図は衝突空気噴出孔の他の
形状例を示す図、第4図(A)、(B)はそれぞれ衝突
空気噴出孔の配列例を示す図、第5図はあまり好ましく
ない衝突空気噴出孔の例を示す断面図である。
10:燃焼缶体
20:下部燃焼室
22:衝突空気噴出孔
25:燃料ガス噴出孔
27:空気衝突点
30:上部燃焼室
31:邪魔板Fig. 1 is a partially sectional perspective view showing an embodiment of the device of the present invention, Fig. 2 is a sectional view of the combustion chamber, Fig. 3 is a view showing another example of the shape of the collision air nozzle, and Fig. 4 (A ) and (B) are diagrams each showing an example of arrangement of collision air jet holes, and FIG. 5 is a sectional view showing an example of a less preferred collision air jet hole. 10: Combustion can body 20: Lower combustion chamber 22: Collision air nozzle 25: Fuel gas nozzle 27: Air collision point 30: Upper combustion chamber 31: Baffle plate
Claims (1)
けられた複数対の衝突空気噴出孔、及び該対の衝突空気
噴出孔から噴出せられる空気の衝突点に向けて下方から
垂直方向にガス燃料を噴出させる複数の燃料ガス噴出孔
とを設けた下部燃焼室と、該下部燃焼室の上方に連続的
に拡大して設けられる上部燃焼室とを有し、且つ上部燃
焼室内には前記下部燃焼室からの上昇流を擾乱する邪魔
板を設けたことを特徴とする衝突燃焼装置。(1) A plurality of pairs of collision air nozzles provided horizontally opposite each other at a relatively short distance, and vertical direction from below toward the collision point of the air ejected from the pairs of collision air nozzles. It has a lower combustion chamber provided with a plurality of fuel gas injection holes for ejecting gas fuel in the direction, and an upper combustion chamber that is continuously expanded above the lower combustion chamber, and inside the upper combustion chamber. An impingement combustion device characterized in that a baffle plate is provided to disturb the upward flow from the lower combustion chamber.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2305400A JPH04177006A (en) | 1990-11-09 | 1990-11-09 | Collision combustion device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2305400A JPH04177006A (en) | 1990-11-09 | 1990-11-09 | Collision combustion device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH04177006A true JPH04177006A (en) | 1992-06-24 |
Family
ID=17944669
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2305400A Pending JPH04177006A (en) | 1990-11-09 | 1990-11-09 | Collision combustion device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH04177006A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01155108A (en) * | 1987-12-14 | 1989-06-19 | Hitachi Chem Co Ltd | Pre-mixing type gas burner |
-
1990
- 1990-11-09 JP JP2305400A patent/JPH04177006A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01155108A (en) * | 1987-12-14 | 1989-06-19 | Hitachi Chem Co Ltd | Pre-mixing type gas burner |
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