JPH0914612A - Heat exchanger built-in type low nox radiant tube burner - Google Patents
Heat exchanger built-in type low nox radiant tube burnerInfo
- Publication number
- JPH0914612A JPH0914612A JP7166034A JP16603495A JPH0914612A JP H0914612 A JPH0914612 A JP H0914612A JP 7166034 A JP7166034 A JP 7166034A JP 16603495 A JP16603495 A JP 16603495A JP H0914612 A JPH0914612 A JP H0914612A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- combustion
- radiant tube
- supply pipe
- heat exchanger
- 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
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は熱交換器を備えた低ＮＯ
ｘラジアントチューブバーナに関するものである。FIELD OF THE INVENTION The present invention relates to a low NO equipped with a heat exchanger.
x Radiant tube burners.
【０００２】[0002]
【従来の技術】従来、低ＮＯｘラジアントチューブバー
ナとしては種々のものが提案されている。その中で低Ｎ
Ｏｘを図るため燃焼排ガス循環方式がある。そして、バ
ーナへ供給する燃焼用空気を燃焼排ガスにより熱交換す
ることにより予熱して熱効率を高めるようになってい
る。2. Description of the Related Art Conventionally, various low NOx radiant tube burners have been proposed. Low N among them
There is a combustion exhaust gas circulation system for achieving Ox. Then, the combustion air supplied to the burner is preheated by exchanging heat with the combustion exhaust gas to enhance the thermal efficiency.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、従来の
ものにおいては、熱交換器が、ラジアントチューブのバ
ーナとは離れたところに別置きされていて、バーナと熱
交換器は配管で接続するため、配管からの放熱損失が大
きいという課題を有していた。また、排ガスの循環に独
自のファンや吸引用エジェクターを設備するためバーナ
へのホットエア配管等の費用が高価なものになるという
欠点がある。したがって、本発明は、放熱損失が少なく
て熱効率が高く、かつ安価な熱交換器内蔵型低ＮＯｘラ
ジアントチューブバーナを提供することを目的とする。However, in the conventional one, the heat exchanger is separately placed apart from the burner of the radiant tube, and the burner and the heat exchanger are connected by piping, There was a problem that the heat radiation loss from the piping was large. In addition, there is a drawback that the cost of hot air piping to the burner becomes expensive because a unique fan and a suction ejector are installed to circulate the exhaust gas. Therefore, an object of the present invention is to provide a low NOx radiant tube burner with a built-in heat exchanger, which has low heat dissipation loss, high thermal efficiency, and is inexpensive.
【０００４】[0004]
【課題を解決するための手段】本発明は、前記目的を達
成するために、中央に燃料ガス供給管と、該供給管外方
に燃焼用空気流路を形成し、かつ、燃料ガスノズル部前
方に１次燃焼室を形成する燃焼用空気供給管と、該空気
供給管の外方に第１調節弁により開閉される燃焼排ガス
流路を形成するとともに第２調節弁により開閉する排ガ
ス出口を備え、ラジアントチューブの一端に取り付けら
れた燃焼排ガス供給管と、前記燃焼用空気供給管の空気
供給部内に前記燃焼排ガス供給管の排ガス供給部の一部
を配設するとともに、両供給部間に燃焼排ガスにより燃
焼用空気を予熱する熱交換器を設ける一方、前記排ガス
供給部をラジアントチューブの他端排気口に接続したも
のである。In order to achieve the above object, the present invention comprises a fuel gas supply pipe in the center and a combustion air flow passage outside the supply pipe, and the front of the fuel gas nozzle. A combustion air supply pipe that forms a primary combustion chamber, and a combustion exhaust gas passage that is opened and closed by a first control valve outside the air supply pipe, and an exhaust gas outlet that is opened and closed by a second control valve. , A combustion exhaust gas supply pipe attached to one end of a radiant tube, and a part of the exhaust gas supply unit of the combustion exhaust gas supply pipe disposed in the air supply unit of the combustion air supply pipe, and combustion between both supply units A heat exchanger for preheating combustion air with exhaust gas is provided, while the exhaust gas supply unit is connected to the other end exhaust port of the radiant tube.
【０００５】[0005]
【実施例】つぎに、本発明の一実施例を図にしたがって
説明する。図において、１は炉壁、２はラジアントチュ
ーブバーナ、３はラジアントチューブである。前記バー
ナ２は、大略、ラジアントチューブ３、燃料ガス供給管
５、燃焼用空気供給管７、燃焼排ガス供給管２０および
熱交換器３０とからなる。Next, an embodiment of the present invention will be described with reference to the drawings. In the figure, 1 is a furnace wall, 2 is a radiant tube burner, and 3 is a radiant tube. The burner 2 is roughly composed of a radiant tube 3, a fuel gas supply pipe 5, a combustion air supply pipe 7, a combustion exhaust gas supply pipe 20 and a heat exchanger 30.
【０００６】前記燃焼用空気供給管７は燃料ガス供給管
５の外方に燃焼用空気流路Ｐ1を形成するように設けら
れたもので、その先端は前記燃料ガス供給管５先端のノ
ズル６より突出して１次燃焼室Ｒを形成するとともに先
端が内方に絞られている。The combustion air supply pipe 7 is provided outside the fuel gas supply pipe 5 so as to form a combustion air flow path P 1 , and its tip is a nozzle at the tip of the fuel gas supply pipe 5. 6, the primary combustion chamber R is formed so as to project and the tip is narrowed inward.
【０００７】前記燃焼排ガス供給管２０は、前記燃焼用
空気供給管７の外方に燃焼排ガス流路Ｐ2を形成し、か
つ、先端部は前記燃焼用空気供給管７より突出させるか
少なくとも同一位置にするとともに、その中間部は前記
チューブ３の炉外端部に取り付けられ、その後端部に排
ガス出口２１が設けられている。The combustion exhaust gas supply pipe 20 forms a combustion exhaust gas passage P 2 outside the combustion air supply pipe 7 and has a tip portion protruding from the combustion air supply pipe 7 or at least the same. In addition to the position, the middle part is attached to the outer end of the furnace of the tube 3, and the exhaust gas outlet 21 is provided at the rear end.
【０００８】なお、Ｓは外部から操作を行なうスパーク
プラグ、１５は蓋部材１４に設けられたサイトホール、
Ｆは前記燃焼排ガス流路Ｐ2のガス流を旋回させる旋回
羽根である。また、燃焼用空気供給管７の外部には第１
調節弁であるダンパ１６が設けられ、外部から操作され
る調節ハンドル１７でバー１８を介して進退させ、下記
する燃焼排ガス流路Ｐ2を流れる燃焼排ガス量を調節す
るようになっている。Incidentally, S is a spark plug which is operated from the outside, 15 is a site hole provided in the lid member 14,
F is a swirl vane that swirls the gas flow in the combustion exhaust gas passage P 2 . In addition, the first outside of the combustion air supply pipe 7
A damper 16, which is a control valve, is provided, and an adjustment handle 17 operated from the outside is used to advance and retreat via a bar 18 to adjust the amount of combustion exhaust gas flowing through a combustion exhaust gas passage P 2 described below.
【０００９】前記熱交換器３０は、空気供給部８と排ガ
ス供給部２２との間に配設したものである。すなわち、
空気供給部８は、前記燃焼用空気供給管７の後方に連通
した第１筒部材９と、この第１筒部材９の外方に所定間
隔をもって前記燃焼排ガス供給管２０に取り付けられた
第２筒部材１１と、第１，第２筒部材９，１１間と第１
筒部材９の流入口１０と所定間隔をもって覆う隔離部材
１３とからなる。The heat exchanger 30 is arranged between the air supply section 8 and the exhaust gas supply section 22. That is,
The air supply unit 8 is attached to the combustion exhaust gas supply pipe 20 at a predetermined interval outside the first cylinder member 9 that communicates with the rear side of the combustion air supply pipe 7. The tubular member 11, the first and second tubular members 9, 11, and the first
It is composed of an inflow port 10 of the tubular member 9 and a separating member 13 which covers the tubular member 9 at a predetermined interval.
【００１０】そして、前記熱交換器３０は、前記第２筒
部材１１と隔離部材１３との間に配設され、排ガス供給
部２２から供給された燃焼排ガスは一点鎖線矢印で示す
ように熱交換器３０、下記する通路Ｐ3間を通って前記
燃焼排ガス供給通路Ｐ2の前記第１ダンパ１８の下流に
流入する。なお、前記排ガス供給部２２は前記ラジアン
トチューブ２の排気部（図示せず）に接続されている。
また、熱交換器３０は実施例においてはコルゲート板か
ら構成しているが、これに限るものでない。The heat exchanger 30 is arranged between the second tubular member 11 and the separating member 13, and the combustion exhaust gas supplied from the exhaust gas supply section 22 is heat-exchanged as indicated by the one-dot chain line arrow. After passing through the reactor 30 and a passage P 3 described below, it flows into the combustion exhaust gas supply passage P 2 downstream of the first damper 18. The exhaust gas supply unit 22 is connected to the exhaust unit (not shown) of the radiant tube 2.
Further, although the heat exchanger 30 is composed of a corrugated plate in the embodiment, it is not limited to this.
【００１１】一方、空気供給部８から供給された燃焼用
空気は実線矢印で示すように、前記熱交換器３０を通っ
てその間に熱交換されて予熱されたのち、隔離部材１３
に設けた通路Ｐ3と第１筒部材９との間を通って第１筒
部材９から燃焼用空気供給管７内に供給される。なお、
１２は第２筒部材１１の中間に設けた蛇腹部で、熱膨張
を吸収するようになっている。On the other hand, the combustion air supplied from the air supply unit 8 passes through the heat exchanger 30 and is preheated by heat exchange therebetween as shown by a solid arrow, and then the separating member 13 is provided.
The air is supplied from the first cylinder member 9 into the combustion air supply pipe 7 through a passage between the passage P 3 provided in the above and the first cylinder member 9. In addition,
Reference numeral 12 denotes a bellows portion provided in the middle of the second tubular member 11 so as to absorb thermal expansion.
【００１２】前記構成からなるため、ラジアントチュー
ブバーナ２を操業するには、燃料ガス供給管５へ燃料ガ
スを供給するとともに、空気供給部８から燃焼用空気を
燃焼用空気供給管７に供給してスパークプラグＳにより
点火する。この場合、前記燃焼用空気は熱交換器３０で
ラジアントチューブ３から排出される燃焼排ガスにより
約６００〜７００℃に予熱されて第１筒部材９から前記
燃焼用空気供給管７内に供給されたのち燃料ガスと１次
燃焼室Ｒで混合するとともにスパークプラグＳで点火
し、その燃焼火炎はチューブ３内に高速にて噴出する。
この火炎の高速噴出により燃焼排ガス通路Ｐ2内の排ガ
スが吸引され火炎と混合するため低ＮＯｘ化が図られる
ことになる。Due to the above construction, in order to operate the radiant tube burner 2, the fuel gas is supplied to the fuel gas supply pipe 5 and the combustion air is supplied from the air supply portion 8 to the combustion air supply pipe 7. The spark plug S ignites. In this case, the combustion air is preheated to about 600 to 700 ° C. by the combustion exhaust gas discharged from the radiant tube 3 in the heat exchanger 30 and supplied from the first tubular member 9 into the combustion air supply pipe 7. Then, the fuel gas is mixed in the primary combustion chamber R and ignited by the spark plug S, and the combustion flame is ejected into the tube 3 at high speed.
Due to the high-speed ejection of the flame, the exhaust gas in the combustion exhaust gas passage P 2 is sucked and mixed with the flame, so that the NOx can be reduced.
【００１３】なお、前記燃焼排ガスはチューブ３の排気
部（図示せず）から排ガス供給部２２に供給され、熱交
換器３０を介して前述のように燃焼用空気を予熱したの
ち、燃焼排ガス供給管２０に至る。ここで一部は前述の
ように火炎にて吸引されてチューブ３内に供給され、残
りは排ガス出口２１から外方に排出される。そして、燃
焼排ガスの排ガス出口２１からの排出量と燃焼排ガス通
路Ｐ2への供給量は前記第１，第２ダンパ１６，１９の
開度調整により行なう。The combustion exhaust gas is supplied from the exhaust portion (not shown) of the tube 3 to the exhaust gas supply portion 22 and preheats the combustion air via the heat exchanger 30 as described above, and then the combustion exhaust gas is supplied. To the pipe 20. Here, a part is sucked by the flame as described above and supplied into the tube 3, and the rest is discharged from the exhaust gas outlet 21 to the outside. The discharge amount of the combustion exhaust gas from the exhaust gas outlet 21 and the supply amount to the combustion exhaust gas passage P 2 are adjusted by adjusting the opening degrees of the first and second dampers 16 and 19.
【００１４】[0014]
【発明の効果】以上の説明で明らかなように、本発明に
よれば、熱交換器はバーナ本体を構成する燃焼用空気供
給部に組込まれているため、熱交換器別置きの従来のも
のに比べてバーナへのホットエア配管が不要で安価であ
るばかりか、配管の放熱損失が少なく高効率である。ま
た、バーナ火炎への排ガス供給は、高速噴流火炎による
吸引力とダンパの開閉により行なうため、特別の排ガス
吸引手段は不要であり、かつ、自在に排ガス吸引量（供
給量）を調整でき、燃焼を安定に保持しつつ低ＮＯｘ性
を得ることができるという効果を奏する。As is apparent from the above description, according to the present invention, since the heat exchanger is incorporated in the combustion air supply portion that constitutes the burner body, the conventional heat exchanger is separately installed. Compared with, the hot air piping to the burner is not necessary and the cost is low, and the heat loss in the piping is small and the efficiency is high. In addition, the exhaust gas is supplied to the burner flame by the suction force of the high-speed jet flame and the opening and closing of the damper, so no special exhaust gas suction means is required and the exhaust gas suction amount (supply amount) can be adjusted freely. There is an effect that low NOx can be obtained while stably maintaining the above.
【図１】 本発明にかかる熱交換器内蔵型低ＮＯｘラジ
アントチューブバーナ。FIG. 1 is a low NOx radiant tube burner with a built-in heat exchanger according to the present invention.
２…ラジアントチューブバーナ、３…ラジアントチュー
ブ、５…燃料ガス供給管、７…燃焼用空気供給管、８…
空気供給部、１６…第１調節弁、１９…第２調節弁、２
１…排ガス出口、２２…排ガス供給部、３０…熱交換
器、Ｐ1…燃焼用空気流路、Ｐ2…燃焼排ガス流路、Ｒ…
１次燃焼室。2 ... Radiant tube burner, 3 ... Radiant tube, 5 ... Fuel gas supply pipe, 7 ... Combustion air supply pipe, 8 ...
Air supply unit, 16 ... First control valve, 19 ... Second control valve, 2
1 ... an exhaust gas outlet, 22 ... exhaust gas supply unit, 30 ... heat exchanger, P 1 ... combustion air passage, P 2 ... flue gas passage, R ...
Primary combustion chamber.
Claims (1)
に燃焼用空気流路を形成し、かつ、燃料ガスノズル部前
方に１次燃焼室を形成する燃焼用空気供給管と、該空気
供給管の外方に第１調節弁により開閉される燃焼排ガス
流路を形成するとともに第２調節弁により開閉する排ガ
ス出口を備え、ラジアントチューブの一端に取り付けら
れた燃焼排ガス供給管と、前記燃焼用空気供給管の空気
供給部内に前記燃焼排ガス供給管の排ガス供給部の一部
を配設するとともに、両供給部間に燃焼排ガスにより燃
焼用空気を予熱する熱交換器を設ける一方、前記排ガス
供給部をラジアントチューブの他端排気口に接続したこ
とを特徴とする熱交換器内蔵型低ＮＯｘラジアントチュ
ーブバーナ。1. A fuel gas supply pipe in the center, a combustion air flow passage outside the supply pipe, and a primary combustion chamber in front of the fuel gas nozzle portion; A combustion exhaust gas supply pipe attached to one end of a radiant tube, the exhaust gas flow passage having an exhaust gas flow passage opened and closed by a first control valve and opened and closed by a second control valve outside the air supply pipe; While arranging a part of the exhaust gas supply part of the combustion exhaust gas supply pipe in the air supply part of the combustion air supply pipe, while providing a heat exchanger for preheating the combustion air with the combustion exhaust gas between both supply parts, A low NOx radiant tube burner with a built-in heat exchanger, characterized in that an exhaust gas supply part is connected to the other end exhaust port of the radiant tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7166034A JPH0914612A (en) | 1995-06-30 | 1995-06-30 | Heat exchanger built-in type low nox radiant tube burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7166034A JPH0914612A (en) | 1995-06-30 | 1995-06-30 | Heat exchanger built-in type low nox radiant tube burner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0914612A true JPH0914612A (en) | 1997-01-17 |
Family
ID=15823725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7166034A Pending JPH0914612A (en) | 1995-06-30 | 1995-06-30 | Heat exchanger built-in type low nox radiant tube burner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0914612A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100470653B1 (en) * | 2002-08-13 | 2005-03-08 | 주식회사 포스코 | An apparatus for igniting a burner in the radient tube of an annealing furnace |
| KR100583819B1 (en) * | 2004-09-30 | 2006-05-26 | 한국에너지기술연구원 | Self regenerative type single radiant tube burner |
| CN109253630A (en) * | 2018-11-04 | 2019-01-22 | 佛山市科皓燃烧设备制造有限公司 | A kind of two-stage exchanges heat low NOx self preheating burner |
| CN115200014A (en) * | 2022-07-01 | 2022-10-18 | 北京兴达奇热工控制设备有限公司 | Air-gas double-preheating blast furnace gas radiation pipe combustion system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07217827A (en) * | 1994-01-25 | 1995-08-18 | Toho Gas Co Ltd | Gas burner |
-
1995
- 1995-06-30 JP JP7166034A patent/JPH0914612A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07217827A (en) * | 1994-01-25 | 1995-08-18 | Toho Gas Co Ltd | Gas burner |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100470653B1 (en) * | 2002-08-13 | 2005-03-08 | 주식회사 포스코 | An apparatus for igniting a burner in the radient tube of an annealing furnace |
| KR100583819B1 (en) * | 2004-09-30 | 2006-05-26 | 한국에너지기술연구원 | Self regenerative type single radiant tube burner |
| CN109253630A (en) * | 2018-11-04 | 2019-01-22 | 佛山市科皓燃烧设备制造有限公司 | A kind of two-stage exchanges heat low NOx self preheating burner |
| CN109253630B (en) * | 2018-11-04 | 2023-09-12 | 佛山市科皓燃烧设备制造有限公司 | Two-stage heat exchange low NOx self-preheating burner |
| CN115200014A (en) * | 2022-07-01 | 2022-10-18 | 北京兴达奇热工控制设备有限公司 | Air-gas double-preheating blast furnace gas radiation pipe combustion system |
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