JPH07229447A - Pressure spraying burner - Google Patents
Pressure spraying burnerInfo
- Publication number
- JPH07229447A JPH07229447A JP2243894A JP2243894A JPH07229447A JP H07229447 A JPH07229447 A JP H07229447A JP 2243894 A JP2243894 A JP 2243894A JP 2243894 A JP2243894 A JP 2243894A JP H07229447 A JPH07229447 A JP H07229447A
- Authority
- JP
- Japan
- Prior art keywords
- spray nozzle
- tip
- annular plate
- fuel
- burner
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G2243/00—Stirling type engines having closed regenerative thermodynamic cycles with flow controlled by volume changes
Landscapes
- Pressure-Spray And Ultrasonic-Wave- Spray Burners (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はスターリングエンジン燃
焼等の高熱負荷燃焼に適用される燃焼器のバーナに関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a burner for a combustor applied to high heat load combustion such as Stirling engine combustion.
【０００２】[0002]
【従来の技術】図３は従来の高熱負荷燃焼用圧力噴霧バ
ーナの一例を示す縦断面図、図４は図３のIV−IV矢視正
面図である。燃料管（０４）と先端が円錐台形のスプレ
イノズル（０５）とから成るバーナガンの外周に、酸化
剤流路と区分するための保護管（０６）を同軸に設け、
その保護管（０６）の外周部が酸化剤（Ｏ2 と不活性ガ
スの混合ガス）の流路となっている。すなわち、燃料管
（０４）と保護管（０６）とで二重管を形成している。
一般に酸化剤は図示していない排ガス熱交換器等により
200℃ないし 400℃に予熱されているので、燃料管（０
４）内の燃料が高温酸化剤の熱によりベーパロックや炭
化を起こすのを防ぐため、燃料管（０４）と保護管（０
６）の間には断熱材（０８）を設けている。2. Description of the Related Art FIG. 3 is a vertical sectional view showing an example of a conventional pressure spray burner for high heat load combustion, and FIG. 4 is a front view taken along the line IV-IV in FIG. A protective tube (06) is provided coaxially on the outer circumference of a burner gun composed of a fuel tube (04) and a spray nozzle (05) having a truncated cone shape, and a protective tube (06) for partitioning the oxidant flow path.
The outer peripheral portion of the protective tube (06) serves as a flow path for the oxidant (mixed gas of O 2 and inert gas). That is, the fuel pipe (04) and the protection pipe (06) form a double pipe.
Generally, the oxidizer is supplied by an exhaust gas heat exchanger (not shown).
Since it is preheated to 200 ℃ to 400 ℃, the fuel pipe (0
4) In order to prevent the fuel in the inside from vapor lock or carbonization due to the heat of the high temperature oxidizer, the fuel pipe (04) and the protective pipe (0
A heat insulating material (08) is provided between 6).
【０００３】燃料管（０４）を通ってスプレイノズル
（０５）に達した燃料は、燃料自身の圧力を利用して燃
焼室（０１）内に霧化供給される。一方、酸化剤は保護
管（０６）外周部の酸化剤流路の先端部に設置したスワ
ラ（旋回羽根）（０７）で旋回流となって燃焼室（０
１）内に供給され、上記霧化燃料を燃焼させる。The fuel that has reached the spray nozzle (05) through the fuel pipe (04) is atomized and supplied into the combustion chamber (01) by utilizing the pressure of the fuel itself. On the other hand, the oxidizer becomes a swirl flow by a swirler (swirl vane) (07) installed at the tip of the oxidant flow path on the outer periphery of the protection tube (06), and becomes a swirling flow.
1) is supplied into and burns the atomized fuel.
【０００４】スプレイノズル（０５）を中心としたバー
ナ周囲は、燃焼火炎による熱輻射を受けるので、耐火材
（０３）を設ける。この耐火材（０３）は保炎維持の機
能も有している。炉壁（０２）部には、通常、熱交換装
置が設置されるが、本図では省略している。Around the burner centering on the spray nozzle (05) receives heat radiation from a combustion flame, so a refractory material (03) is provided. This refractory material (03) also has a function of maintaining flame holding. A heat exchange device is usually installed in the furnace wall (02), but it is omitted in this figure.
【０００５】[0005]
【発明が解決しようとする課題】燃料を圧力で噴霧する
圧力噴霧ノズルは、二流体噴霧ノズルのように噴霧媒体
（蒸気等の高圧力ガス）を必要としないため、メンテナ
ンス・制御性に優れる一方、燃焼面では二流体噴霧ノズ
ルと比較して噴霧粒径が大きいこと、燃料の噴出流速が
遅いこと、およびスプレイノズル（０５）噴出部近傍の
燃料濃度が濃いこと等の要因により、スプレイノズル
（０５）の先端部にカーボンが付着し徐々に成長して、
霧化不良（排ガスＣＯ増大）や燃焼量変動などを起こ
し、燃焼を著しく阻害する。The pressure atomizing nozzle for atomizing fuel does not require an atomizing medium (high pressure gas such as steam) unlike the two-fluid atomizing nozzle, and therefore has excellent maintenance and controllability. In the combustion surface, the spray nozzle (05) has a larger spray particle size, a slower fuel jet velocity, and a thicker fuel concentration near the spray nozzle (05). Carbon is attached to the tip of 05) and gradually grows,
Atomization failure (increase in exhaust gas CO), fluctuation of combustion amount, etc. occur and combustion is significantly hindered.
【０００６】また、スプレイノズル（０５）と環状管
（０６）先端部との隙間（滞留部）では一部循環渦が発
生すること、ならびにスプレイノズル（０５）先端部は
燃焼火炎の熱輻射を直線受けること等によって、表面の
メタル温度が数百度に上昇し、前記カーボン付着をます
ます助長する要因となっている。Further, some circulating vortices are generated in the gap (retaining portion) between the spray nozzle (05) and the tip of the annular pipe (06), and the tip of the spray nozzle (05) emits heat radiation of combustion flame. By receiving a straight line, the metal temperature on the surface rises to several hundred degrees, which is a factor that further promotes the carbon adhesion.
【０００７】[0007]
【課題を解決するための手段】本発明者は、前記従来の
課題を解決するために、先端が円錐台形のスプレイノズ
ルおよび同スプレイノズルの後端に取付けられた燃料管
から成り液体燃料を同燃料自体の圧力により霧化するバ
ーナガンと、同バーナガンの周囲を間隔をへだてて取囲
む保護管と、同保護管の周囲に形成された酸化剤流路
と、同酸化剤流路の先端部に設けられた旋回羽根とを備
えた圧力噴霧バーナにおいて、上記旋回羽根の後方で上
記保護管に複数の開孔を設けるとともに、上記スプレイ
ノズルの先端を間隙を存して取囲み内周面が上記円錐台
の傾斜角と同一角度で傾斜した環状の板を上記保護管の
先端に取付けたことを特徴とする圧力噴霧バーナを提案
するものである。In order to solve the above-mentioned conventional problems, the inventor of the present invention uses a liquid fuel which comprises a spray nozzle having a truncated cone tip and a fuel pipe attached to the rear end of the spray nozzle. A burner gun that atomizes due to the pressure of the fuel itself, a protective tube that surrounds the burner gun with a space around it, an oxidant channel formed around the protective tube, and the tip of the oxidant channel In a pressure spray burner provided with a swirl vane provided, a plurality of openings are provided in the protection tube behind the swirl vane, and the tip of the spray nozzle is surrounded by an inner surface with a gap. The pressure spray burner is characterized in that an annular plate inclined at the same angle as the truncated cone is attached to the tip of the protection tube.
【０００８】[0008]
【作用】本発明は前記構成を有するので、酸化剤流路に
供給された酸化剤の一部が、保護管に設けられた開孔を
通って燃料管と保護管の間の環状断面空間に流入し、ス
プレイノズルと環状の板との隙間から補助酸化剤として
噴出する。この場合、環状の板の開孔内周面はスプレイ
ノズルの先端部円錐台の傾斜角と同一角度で傾斜してい
るので、上記補助酸化剤は内向きに噴出して、スプレイ
ノズル近傍に強制供給される。これにより、ノズル噴出
部近傍の空気不足に伴なう煤の発生が抑制されるばかり
でなく、酸化剤と燃料の比率が適正値に増大し、着火点
が格段に安定する。Since the present invention has the above-mentioned structure, a part of the oxidant supplied to the oxidant flow path passes through the opening provided in the protective tube and enters the annular cross-sectional space between the fuel tube and the protective tube. It flows in and is ejected as an auxiliary oxidant from the gap between the spray nozzle and the annular plate. In this case, since the inner peripheral surface of the opening of the annular plate is inclined at the same angle as the inclination angle of the tip truncated cone of the spray nozzle, the auxiliary oxidant is jetted inward and forced near the spray nozzle. Supplied. This not only suppresses the generation of soot due to the shortage of air in the vicinity of the nozzle ejection portion, but also increases the ratio of the oxidizer and the fuel to an appropriate value and remarkably stabilizes the ignition point.
【０００９】また環状の板の設置により、不要なガス滞
留部が無くなり、更にスプレイノズルが燃焼火炎から熱
輻射を受ける領域は燃料噴出面（円錐台頂面）のみとな
るから、補助酸化剤による冷却効果とも相俟って、スプ
レイノズルのメタル温度上昇が防止される。Further, the installation of the annular plate eliminates unnecessary gas retention portions, and the area where the spray nozzle receives the heat radiation from the combustion flame is only the fuel ejection surface (the truncated cone top surface). Combined with the cooling effect, the metal temperature rise of the spray nozzle is prevented.
【００１０】[0010]
【実施例】図１は本発明の一実施例を示す縦断面図、図
２は図１のII−II矢視正面図である。1 is a vertical sectional view showing an embodiment of the present invention, and FIG. 2 is a front view taken along the line II--II of FIG.
【００１１】先端が円錐台形のスプレイノズル（０５）
と同スプレイノズル（０５）の後端に取付けられた燃料
管（０４）とでバーナガンを形成しており、そのバーナ
ガンは液体燃料を燃料自体の圧力により霧化するように
なっている。（０６）は上記バーナガンの周囲を間隔を
へだてて取囲む保護管であって、その保護管（０６）の
周囲に酸化剤流路が形成されている。この酸化剤流路の
先端部にはスワラ（旋回羽根）（０７）が設けられてい
る。A spray nozzle (05) having a truncated cone tip
And a fuel pipe (04) attached to the rear end of the spray nozzle (05) form a burner gun, which atomizes liquid fuel by the pressure of the fuel itself. Reference numeral (06) is a protective tube surrounding the burner gun with a gap, and an oxidant channel is formed around the protective tube (06). A swirler (swirl vane) (07) is provided at the tip of the oxidant flow channel.
【００１２】本実施例においては、旋回羽根（０７）の
後方で保護管（０６）に複数の開孔（１２）が明けられ
ている。また保護管（０６）の先端には、スプレイノズ
ル（０５）の先端を間隙を存して取囲み内周面が上記円
錐台の傾斜角と同一角度θで傾斜した環状の板（１１）
が取付けられている。In this embodiment, a plurality of openings (12) are formed in the protective tube (06) behind the swirl vane (07). An annular plate (11) is provided at the tip of the protective tube (06) so as to surround the tip of the spray nozzle (05) with a gap and the inner peripheral surface is inclined at the same angle θ as the inclination angle of the truncated cone.
Is installed.
【００１３】このようなバーナにおいて、酸化剤流路内
の酸化剤の一部は保護管（０６）に設けられた開孔（１
２）を通って燃料管（０４）と保護管（０６）の環状断
面空間に流入し、スプレイノズル（０５）と環状板（１
１）の隙間から補助酸化剤として燃焼室（０１）内に供
給される。In such a burner, a part of the oxidant in the oxidant flow path is provided with an opening (1) provided in the protection tube (06).
2) into the annular cross-sectional space of the fuel pipe (04) and the protective pipe (06), and then the spray nozzle (05) and the annular plate (1).
It is supplied as an auxiliary oxidant into the combustion chamber (01) through the gap 1).
【００１４】環状板（１１）の開孔内周面はスプレイノ
ズル（０５）先端部円錐台の傾斜面と平行、すなわち同
一角度θで傾斜しているので、補助酸化剤は内向きに噴
出しノズル（０５）近傍に強制供給される。これにより
ノズル噴出部近傍の空気不足に伴なう煤の発生が抑制さ
れるばかりでなく、酸化剤と燃料の比率が適正値に増大
し、着火点が著しく安定する。Since the inner peripheral surface of the aperture of the annular plate (11) is parallel to the inclined surface of the truncated cone of the spray nozzle (05), that is, inclined at the same angle θ, the auxiliary oxidant is ejected inward. It is forcibly supplied near the nozzle (05). This not only suppresses the generation of soot due to the shortage of air in the vicinity of the nozzle ejection portion, but also increases the ratio of the oxidizer and the fuel to an appropriate value and remarkably stabilizes the ignition point.
【００１５】また環状板（１１）の設置により不要なガ
ス滞留部が無くなり、更にスプレイノズル（０５）が燃
焼火炎から熱輻射を受ける領域は燃料噴出面（円錐台頂
面）のみとなるから、補助酸化剤による冷却効果とも相
俟って、スプレイノズル（０５）のメタル温度上昇が防
止される。Further, the installation of the annular plate (11) eliminates unnecessary gas retention portions, and the spray nozzle (05) receives heat radiation from the combustion flame only on the fuel ejection surface (top surface of the truncated cone). In combination with the cooling effect of the auxiliary oxidant, the metal temperature rise of the spray nozzle (05) is prevented.
【００１６】環状板（１１）の開口内周面の内向き角
度、すなわちスプレイノズル（０５）先端部円錐台の傾
斜角度θは、３０°ないし６０°の範囲に設定する。こ
れが３０°未満だと煤が付着し易くなるし、６０°を超
えると着火が不安定になるからである。また、環状板
（１１）の開口内周面とスプレイノズル（０５）先端部
との隙間の断面積は、保護管（０６）の外側の酸化剤流
路断面積の５％ないし２５％の範囲とする。５％未満で
は補助酸化剤の流速（流量）が低下して煤が付着し易く
なるし、２５％を超えると着火が不安定になるからであ
る。上記設定範囲は旋回羽根（０７）の設計スワラ角度
（〜６０°）によって、それぞれ最適値が異なることに
よる。The inward angle of the inner peripheral surface of the opening of the annular plate (11), that is, the inclination angle θ of the truncated cone at the tip of the spray nozzle (05) is set in the range of 30 ° to 60 °. If this is less than 30 °, soot tends to adhere, and if it exceeds 60 °, ignition becomes unstable. The cross-sectional area of the gap between the inner peripheral surface of the opening of the annular plate (11) and the tip of the spray nozzle (05) is in the range of 5% to 25% of the cross-sectional area of the oxidant flow channel outside the protective tube (06). And This is because if it is less than 5%, the flow rate (flow rate) of the auxiliary oxidant decreases, and soot tends to adhere, and if it exceeds 25%, ignition becomes unstable. The above setting range is because the optimum values are different depending on the design swirler angle (to 60 °) of the swirl vane (07).
【００１７】本実施例によれば、広範囲の圧力（〜７０
ata ）、酸化剤Ｏ2 濃度（〜５０％）、熱負荷（〜８０
０×１０4 kcal／m3ｈ）条件でスプレイノズルへカーボ
ンが付着せず、しかも着火安定性、燃焼性に優れた圧力
噴霧バーナが得られる。According to this embodiment, a wide range of pressure (~ 70
ata), oxidant O 2 concentration (~ 50%), heat load (~ 80)
Under the condition of 0 × 10 4 kcal / m 3 h), carbon does not adhere to the spray nozzle, and a pressure spray burner excellent in ignition stability and combustibility can be obtained.
【００１８】[0018]
【発明の効果】本発明によれば、広範囲の圧力、酸化剤
Ｏ2 濃度、熱負荷条件でスプレイノズルにカーボンが付
着せず、しかも着火安定性、燃焼性に優れた圧力噴霧燃
焼方式の高圧、高熱負荷対応バーナが提供される。According to the present invention, carbon does not adhere to the spray nozzle under a wide range of pressure, oxidant O 2 concentration, and heat load conditions, and the high pressure of the pressure spray combustion system is excellent in ignition stability and combustibility. , A burner for high heat load is provided.
【図１】図１は本発明の一実施例を示す縦断面図であ
る。FIG. 1 is a vertical sectional view showing an embodiment of the present invention.
【図２】図２は図１のII−II矢視正面図である。FIG. 2 is a front view taken along the line II-II of FIG.
【図３】図３は従来の高熱負荷燃焼用圧力噴霧バーナの
一例を示す縦断面図である。FIG. 3 is a longitudinal sectional view showing an example of a conventional pressure spray burner for high heat load combustion.
【図４】図４は図３のIV−IV矢視正面図である。FIG. 4 is a front view taken along the line IV-IV in FIG.
（０１） 燃焼室 （０２） 炉壁 （０３） 耐火材 （０４） 燃料管 （０５） スプレイノズル （０６） 保護管 （０７） スワラ（旋回羽根） （０８） 断熱材 （１１） 環状板 （１２） 開孔 (01) Combustion chamber (02) Furnace wall (03) Refractory material (04) Fuel pipe (05) Spray nozzle (06) Protective tube (07) Swirler (swirl vane) (08) Heat insulating material (11) Annular plate (12) ) Open hole
Claims (1)
同スプレイノズルの後端に取付けられた燃料管から成り
液体燃料を同燃料自体の圧力により霧化するバーナガン
と、同バーナガンの周囲を間隔をへだてて取囲む保護管
と、同保護管の周囲に形成された酸化剤流路と、同酸化
剤流路の先端部に設けられた旋回羽根とを備えた圧力噴
霧バーナにおいて、上記旋回羽根の後方で上記保護管に
複数の開孔を設けるとともに、上記スプレイノズルの先
端を間隙を存して取囲み内周面が上記円錐台の傾斜角と
同一角度で傾斜した環状の板を上記保護管の先端に取付
けたことを特徴とする圧力噴霧バーナ。1. A burner gun, which comprises a spray nozzle having a frustoconical tip and a fuel pipe attached to the rear end of the spray nozzle, which atomizes liquid fuel by the pressure of the fuel itself, and a space around the burner gun. In a pressure spray burner including a protective tube surrounding the protective tube, an oxidant flow path formed around the protective tube, and a swirl vane provided at the tip of the oxidant flow channel, While providing a plurality of openings in the protection tube, an annular plate that surrounds the tip of the spray nozzle with a gap and has an inner peripheral surface inclined at the same angle as the inclination angle of the truncated cone is provided in the protection tube. A pressure spray burner characterized by being attached to the tip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02243894A JP3300722B2 (en) | 1994-02-21 | 1994-02-21 | Pressure spray burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02243894A JP3300722B2 (en) | 1994-02-21 | 1994-02-21 | Pressure spray burner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07229447A true JPH07229447A (en) | 1995-08-29 |
| JP3300722B2 JP3300722B2 (en) | 2002-07-08 |
Family
ID=12082715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP02243894A Expired - Fee Related JP3300722B2 (en) | 1994-02-21 | 1994-02-21 | Pressure spray burner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3300722B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005291534A (en) * | 2004-03-31 | 2005-10-20 | Babcock Hitachi Kk | Combustion equipment and method of biomass fuel |
| KR100657864B1 (en) * | 2004-12-02 | 2006-12-15 | 한국기계연구원 | Oxyfuel Burner With High Speed Injection |
-
1994
- 1994-02-21 JP JP02243894A patent/JP3300722B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005291534A (en) * | 2004-03-31 | 2005-10-20 | Babcock Hitachi Kk | Combustion equipment and method of biomass fuel |
| KR100657864B1 (en) * | 2004-12-02 | 2006-12-15 | 한국기계연구원 | Oxyfuel Burner With High Speed Injection |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3300722B2 (en) | 2002-07-08 |
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