JPS63113206A - Radiant tube burner - Google Patents
Radiant tube burnerInfo
- Publication number
- JPS63113206A JPS63113206A JP61256856A JP25685686A JPS63113206A JP S63113206 A JPS63113206 A JP S63113206A JP 61256856 A JP61256856 A JP 61256856A JP 25685686 A JP25685686 A JP 25685686A JP S63113206 A JPS63113206 A JP S63113206A
- Authority
- JP
- Japan
- Prior art keywords
- combustion
- exhaust gas
- gas
- air
- 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
- 239000007789 gas Substances 0.000 claims abstract description 71
- 238000002485 combustion reaction Methods 0.000 claims abstract description 49
- 239000002737 fuel gas Substances 0.000 claims description 8
- 238000009423 ventilation Methods 0.000 claims description 7
- 238000007664 blowing Methods 0.000 claims description 6
- 230000003111 delayed effect Effects 0.000 claims description 2
- 239000000567 combustion gas Substances 0.000 abstract description 5
- 239000006185 dispersion Substances 0.000 abstract description 5
- 239000000203 mixture Substances 0.000 abstract description 5
- 239000000126 substance Substances 0.000 abstract description 2
- 239000000446 fuel Substances 0.000 abstract 2
- 238000002347 injection Methods 0.000 abstract 1
- 239000007924 injection Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
Landscapes
- Combustion Of Fluid Fuel (AREA)
- Gas Burners (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、ラジアントチューブ内に設けられた燃焼筒内
へ、ガスバーナのノズルを同心的に臨ませ、ガスバーナ
から噴出される燃料ガスを前記ガスバーナと燃焼筒との
間の環状空間に設けられた一次空気旋回羽根を介して供
給される一次空気により、一次燃焼させると共に前記燃
焼筒とラジアントチューブとの間の環状空間を通して供
給される二次空気により二次燃焼させるラジアントチュ
ーブに関するものであり、さらに、くわしくは、ＮＯｘ
の発生を低減せしめるために、燃焼排ガスを燃料ガスに
混入することによって火炎の燃焼速度を遅らせてＮＯｘ
の発生量を低減させるか、または燃焼排ガスを燃焼用二
次空気に混入することによって、前述したようにＮＯｘ
の低減を図ることができるラジアントチューブに係るも
のである。Detailed Description of the Invention The present invention has a gas burner nozzle facing concentrically into a combustion tube provided in a radiant tube, and directs the fuel gas ejected from the gas burner between the gas burner and the combustion tube. A radiant tube in which primary combustion is performed by primary air supplied through a primary air swirl vane provided in an annular space, and secondary combustion is performed by secondary air supplied through an annular space between the combustion cylinder and the radiant tube. related to NOx.
In order to reduce the generation of NOx, combustion exhaust gas is mixed into the fuel gas to slow down the flame combustion speed and reduce NOx.
As mentioned above, NOx can be reduced by reducing the amount of NOx generated or by mixing combustion exhaust gas into secondary combustion air.
This invention relates to a radiant tube that can reduce the
このようなラジアントチューブバーナにおいて、専用の
低ＮＯｘ低減対策として各種の排ガス循環方式のバーナ
が提案されているが、いずれの場合においても排ガスの
循環量に制限があり、大量に排ガスを循環させることは
できず、それ程のＮＯｘ低減を期待することはできない
。For such radiant tube burners, various exhaust gas circulation type burners have been proposed as dedicated low NOx reduction measures, but in all cases, there is a limit to the amount of exhaust gas that can be circulated, and it is difficult to circulate a large amount of exhaust gas. Therefore, it is not possible to expect such a reduction in NOx.
本発明は、燃料ガスに少量の排ガスを混入することによ
り効果的なＮＯｘの低減を図るか、または燃焼用二次空
気に排ガスを混入し、かつ、−次空気は一次空気旋回羽
根を設けることで一層効果的な一次燃焼を行ない、排ガ
スの混入した二次空気により吹消えなどの燃焼トラブル
が起らないＮＯｘの低減を図ることができるラジアント
チューブバーナを提供するも”ので”ある。The present invention aims to effectively reduce NOx by mixing a small amount of exhaust gas into the fuel gas, or mixes exhaust gas into the secondary air for combustion, and provides a primary air swirl vane for the secondary air. It is an object of the present invention to provide a radiant tube burner that can perform more effective primary combustion and reduce NOx without causing combustion troubles such as blowout due to secondary air mixed with exhaust gas.
このため、本発明によれば、ガス供給管に取付けてある
混合器および空気通風ケースに設けた排ガス吹込ノズル
と排ガス管とを排ガスファンを介して配管にて接続した
ものである。Therefore, according to the present invention, the mixer attached to the gas supply pipe, the exhaust gas blowing nozzle provided in the air ventilation case, and the exhaust gas pipe are connected by piping via an exhaust gas fan.
図において、ガスバーナ１は、このバーナ１のまわりに
設けられた燃焼筒２の中に同心的に配置されるべき突出
した火炎分散型ノズル３を有し、バーナ後端にはガス供
給管４が接続されており、このガス供給管４には燃料ガ
スと燃焼排ガスの混合器５が取付けてあり、燃焼筒２の
後方には、ガスバーナ１を包囲する一次空気供給筒６が
連続形成してあって、その周囲にわたり４個の一次空気
流入口７が穿設しである。In the figure, a gas burner 1 has a protruding flame dispersion nozzle 3 to be disposed concentrically in a combustion tube 2 provided around the burner 1, and a gas supply pipe 4 is provided at the rear end of the burner. A mixer 5 for fuel gas and combustion exhaust gas is attached to the gas supply pipe 4, and a primary air supply pipe 6 surrounding the gas burner 1 is continuously formed at the rear of the combustion pipe 2. Four primary air inlets 7 are bored around the periphery.
また、ガスバーナ１の先端部には１５〜４０゜の角度を
有する一次空気旋回羽根８が固着してあり、燃焼筒２お
よび一次空気供給筒６の外周にはラジアントチューブ９
が設けられており、このラジアントチューブ９にはフラ
ンジｌＯを介して燃焼空気通風ケース１１が取付けてあ
る。Further, a primary air swirling vane 8 having an angle of 15 to 40 degrees is fixed to the tip of the gas burner 1, and a radiant tube 9 is attached to the outer periphery of the combustion tube 2 and the primary air supply tube 6.
A combustion air ventilation case 11 is attached to the radiant tube 9 via a flange lO.
さらに、燃焼空気通風ケース１１には二次空気に排ガス
を混入することができる排ガス吹込ノズル１２が付設し
てあり、かつ空気Ａを導入する空気供給管１３が接続し
である。Further, the combustion air ventilation case 11 is provided with an exhaust gas blowing nozzle 12 that can mix exhaust gas into the secondary air, and is connected to an air supply pipe 13 that introduces air A.
なお、パイロットバーナ１４は燃焼空気通風ケース１１
の端ｉ１５を通って一端が火炎分散型ノズル３に臨んで
おり、排ガスファン１６は配管１７およびバルブ１８．
１９を介して排ガス管２０と混合器５および排ガス吹込
ノズル１２に接続せしめられている。Note that the pilot burner 14 is connected to the combustion air ventilation case 11.
One end faces the flame dispersion type nozzle 3 through the end i15 of the exhaust gas fan 16, and the exhaust gas fan 16 is connected to the pipe 17 and the valve 18.
The exhaust gas pipe 20 is connected to the mixer 5 and the exhaust gas blowing nozzle 12 via the exhaust gas pipe 19 .
さて、燃料ガスＧは、バルブ１８の開放によって排ガス
管２０からの排ガスＣｒｔが排ガスファン１６の作動に
より混合器５にて前記排ガスと混合され、次いで、ガス
供給管４を介してガスバーナｌ内に導入された混合ガス
は火炎分散型ノズル３から燃焼筒２内に噴出され、この
噴出混合ガスは一次空気流入口７を経て流入し、かつ、
−次空気供給筒６を通過して一次空気旋回羽根８で旋回
せしめられる一次空気Ａ１と共に旋回撹拌されて還元一
次燃焼を行ない、この一次燃焼ガスは燃焼筒２から高速
で噴出する。Now, as for the fuel gas G, the exhaust gas Crt from the exhaust gas pipe 20 is mixed with the exhaust gas in the mixer 5 by the operation of the exhaust gas fan 16 by opening the valve 18, and then is fed into the gas burner l via the gas supply pipe 4. The introduced mixed gas is ejected from the flame dispersion type nozzle 3 into the combustion tube 2, and this ejected mixed gas flows through the primary air inlet 7, and
- The primary combustion gas passes through the primary air supply tube 6 and is swirled together with the primary air A1 swirled by the primary air swirl vane 8 to perform reduction primary combustion, and this primary combustion gas is ejected from the combustion tube 2 at high speed.
一方、−次空気ＡＩと一定の比に分配された二次空気Ａ
２は、バルブ１９の開放によって排ガス管２０からの排
ガスＧｙが排ガスファン１６の作動により燃焼空気通風
ケース１１の先端部に設けられた排ガス吹込ノズル１２
から吹込まれた前記排ガスと混合（Ａ２−１−ｃｖ）シ
て、燃焼筒２とラジアントチューブバーナ９との間の環
状空間に導入され、燃焼筒２を冷却しながら低速で噴出
される。この場合、燃焼ｎ２のノズルから噴出される一
次燃焼ガスは高速で噴出され、二次空気Ａ２は低速で噴
出されることから、一次燃焼ガスと前記二次空気（排ガ
ス混合）は流速に差があるために混合が遅れ、したがっ
て、通常の排ガス循環方式のバーナに比較して多大のＮ
Ｏｘの低減を達成することができる。On the other hand, secondary air A distributed at a constant ratio to secondary air AI
2 is an exhaust gas blowing nozzle 12 provided at the tip of the combustion air ventilation case 11 through the operation of the exhaust gas fan 16 and the exhaust gas Gy from the exhaust gas pipe 20 when the valve 19 is opened.
It is mixed (A2-1-cv) with the exhaust gas blown in from the radiant tube burner 9 and introduced into the annular space between the combustion tube 2 and the radiant tube burner 9, and is ejected at a low speed while cooling the combustion tube 2. In this case, the primary combustion gas ejected from the nozzle of combustion n2 is ejected at high speed, and the secondary air A2 is ejected at low speed, so there is a difference in flow velocity between the primary combustion gas and the secondary air (exhaust gas mixture). Because of this, mixing is delayed, and therefore a large amount of N is required compared to a normal exhaust gas circulation type burner.
Ox reduction can be achieved.
本発明によるラジアントチューブバーナでは、排ガスを
燃料ガスに混入するだけでもＮＯｘの発生量を低減する
ことができるのみならず、二次空気にも排ガスを混入す
ることによってＮＯｘの発生量を低減し得るだけでなく
、−次空気旋回羽根を設けることにより一次燃焼を一層
安定させて高炭化水素を充分に熱分解し、かつ、二次燃
焼を緩やかにして一酸化炭素などの未燃物の発生の全く
ない良好な燃焼が行なわれて低ＮＯｘを達成することが
できるものである。In the radiant tube burner according to the present invention, the amount of NOx generated can be reduced not only by mixing exhaust gas into the fuel gas, but also by mixing the exhaust gas into the secondary air. In addition, by providing a secondary air swirl vane, primary combustion is further stabilized to sufficiently thermally decompose high hydrocarbons, and secondary combustion is slowed down to reduce the generation of unburned substances such as carbon monoxide. Good combustion with no NOx can be achieved and low NOx can be achieved.
図面は本発明に係るラジアントチューブバーナの軸方向
断面図に排ガスの流れを補足したものである。
なお、図示された主要部と符号との対応関係は下記の通
りである。
１・・・ガスバーナ、２・・・燃焼筒、３・・・火炎分
散型ノズル、４・・・ガス供給管、５・・・混合器、８
・・・−次空気旋回羽根、９・・・ラジアントチューブ
、１１・・・燃焼空気通風ケース、１２・・・排ガス吹
込ノズル、１６・拳・排ガスファン、■７・・・配管、
２０・・・排ガス管。
特許出願人 日本燃焼システム株式会社同 三菱重
工業株式会社The drawing is an axial cross-sectional view of the radiant tube burner according to the present invention supplemented with the flow of exhaust gas. Note that the correspondence relationship between the main parts shown and the symbols is as follows. DESCRIPTION OF SYMBOLS 1... Gas burner, 2... Combustion tube, 3... Flame dispersion type nozzle, 4... Gas supply pipe, 5... Mixer, 8
...-Next air swirl vane, 9...Radiant tube, 11...Combustion air ventilation case, 12...Exhaust gas blowing nozzle, 16.Fist/exhaust gas fan, ■7...Piping,
20...Exhaust gas pipe. Patent applicant: Japan Combustion System Co., Ltd. Mitsubishi Heavy Industries, Ltd.
Claims (1)
へ、ガスバーナのノズルを同心的に臨ませ、ガスバーナ
から噴出される燃料ガスを前記ガスバーナと燃焼筒との
間の環状空間に設けられた一次空気旋回羽根を介して供
給される一次空気により、一次燃焼させると共に前記燃
焼筒とラジアントチユーブとの間の環状空間を通して供
給される二次空気により二次燃焼させる型式のバーナに
おいて、ガス供給管に取付けてある混合器および燃焼空
気通風ケースに設けた排ガス吹込ノズルと排ガス管とを
排ガスファンを介して配管にて接続したことを特徴とす
るラジアントチユーブバーナ。 ２ 燃焼排ガスを燃料ガスに混入して供給することによ
り火炎の燃焼速度を遅らせてＮＯｘを低減させるように
したことを特徴とする、特許請求の範囲第１項に記載の
ラジアントチユーブバーナ。 ３ 燃焼排ガスを燃焼用二次空気に混入して供給するこ
とにより火炎の燃焼速度を遅らせてＮＯｘを低減させる
ようにしたことを特徴とする、特許請求の範囲第１項に
記載のラジアントチユーブバーナ。[Claims] 1. A nozzle of a gas burner is concentrically faced into a combustion tube provided in a radiant tube burner, and fuel gas ejected from the gas burner is directed into an annular space between the gas burner and the combustion tube. In a burner of a type in which primary combustion is performed by primary air supplied through a provided primary air swirl vane, and secondary combustion is performed by secondary air supplied through an annular space between the combustion tube and the radiant tube, A radiant tube burner characterized in that a mixer attached to a gas supply pipe and an exhaust gas blowing nozzle provided in a combustion air ventilation case are connected to the exhaust gas pipe by piping via an exhaust gas fan. 2. The radiant tube burner according to claim 1, characterized in that the combustion speed of the flame is delayed and NOx is reduced by supplying combustion exhaust gas mixed with fuel gas. 3. The radiant tube burner according to claim 1, characterized in that combustion exhaust gas is mixed with secondary combustion air and supplied to retard the combustion speed of the flame and reduce NOx. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61256856A JPS63113206A (en) | 1986-10-30 | 1986-10-30 | Radiant tube burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61256856A JPS63113206A (en) | 1986-10-30 | 1986-10-30 | Radiant tube burner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63113206A true JPS63113206A (en) | 1988-05-18 |
| JPH0480284B2 JPH0480284B2 (en) | 1992-12-18 |
Family
ID=17298365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61256856A Granted JPS63113206A (en) | 1986-10-30 | 1986-10-30 | Radiant tube burner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63113206A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100583820B1 (en) | 2004-09-30 | 2006-05-26 | 한국에너지기술연구원 | Twin regenerative radiant tube burner |
| KR20220119701A (en) | 2020-02-10 | 2022-08-30 | 제이에프이 스틸 가부시키가이샤 | Radiant Tube Burners, Radiant Tubes, and Design Methods for Radiant Tube Burners |
-
1986
- 1986-10-30 JP JP61256856A patent/JPS63113206A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100583820B1 (en) | 2004-09-30 | 2006-05-26 | 한국에너지기술연구원 | Twin regenerative radiant tube burner |
| KR20220119701A (en) | 2020-02-10 | 2022-08-30 | 제이에프이 스틸 가부시키가이샤 | Radiant Tube Burners, Radiant Tubes, and Design Methods for Radiant Tube Burners |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0480284B2 (en) | 1992-12-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| EXPY | Cancellation because of completion of term |