JPH02306009A - Low calorie gas burner - Google Patents
Low calorie gas burnerInfo
- Publication number
- JPH02306009A JPH02306009A JP12619589A JP12619589A JPH02306009A JP H02306009 A JPH02306009 A JP H02306009A JP 12619589 A JP12619589 A JP 12619589A JP 12619589 A JP12619589 A JP 12619589A JP H02306009 A JPH02306009 A JP H02306009A
- Authority
- JP
- Japan
- Prior art keywords
- diameter
- flow channel
- combustion air
- burner
- combustion
- 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
- 238000002485 combustion reaction Methods 0.000 claims abstract description 48
- 239000007789 gas Substances 0.000 abstract description 43
- 239000012530 fluid Substances 0.000 abstract description 2
- 239000000567 combustion gas Substances 0.000 abstract 1
- 238000002347 injection Methods 0.000 abstract 1
- 239000007924 injection Substances 0.000 abstract 1
- 230000005855 radiation Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 6
- 239000003381 stabilizer Substances 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 238000009841 combustion method Methods 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
- F23D2900/14—Special features of gas burners
- F23D2900/14002—Special features of gas burners of premix or non premix types, specially adapted for the combustion of low heating value [LHV] gas
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、発熱量の低い低カロリーガスを安定して燃焼
させるに好適な低カロリーガスの燃焼装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a low-calorie gas combustion device suitable for stably burning low-calorie gas with a low calorific value.
高炉から排出される高炉ガス等の低カロリーガスは、一
般に発熱量が低く、又ガス圧力も低く、その侭では燃焼
が困難である。Low-calorie gas such as blast furnace gas discharged from a blast furnace generally has a low calorific value and low gas pressure, and is difficult to burn in that state.
上記の低カロリーガスを燃焼させる方法としてｔ−
■ 第７図に示す通り排ガス顕熱を利用して低カロリー
ガス、燃焼用空気を予熱する方法、■ 第８図ＡＢに示
すバーナ自身に排ガス顕熱による予熱機構を設ける方法
、
■ 水素などの助燃料物質を添加する方法、■ 触媒物
質の作用による燃焼方法、
■ 酸素富化による燃焼方法、
等が知られている。Methods for burning the above-mentioned low-calorie gas include t- ■ A method of preheating the low-calorie gas and combustion air using exhaust gas sensible heat as shown in Figure 7; The following methods are known: (1) a method of providing a preheating mechanism using heat; (1) a method of adding a fuel auxiliary substance such as hydrogen; (2) a combustion method by the action of a catalyst substance; (4) a combustion method by oxygen enrichment.
しかしながら、上記の方法では低カロリーガスを安定燃
焼させるには、次のような問題がある。However, the above method has the following problems in stably burning low calorie gas.
例えば、前ｔ８の■の方法では、第７図に示すように低
力口・リーガス、燃焼用空気を予熱する為の熱交換器が
必要であり、前掲の方法■ではバーナ自身が複雑な構造
となる。又前掲の方法■の助燃料物質は物質自身が高価
であること、前掲の方法■の触媒物質は高負荷燃焼には
不適で、助燃料物質と同じく高価であり経済的でない。For example, in the method (■) of t8 above, as shown in Figure 7, a heat exchanger for preheating the low-power outlet, gas, and combustion air is required, and in the method (2) described above, the burner itself has a complicated structure. becomes. Further, the auxiliary fuel material used in method (2) is expensive, and the catalytic material used in method (2) is not suitable for high-load combustion and, like the auxiliary fuel material, is expensive and uneconomical.
更に、前掲の■の方法では、酸素富化した燃焼用空気あ
るいは酸素が必要で、省資源、省エネの観点から問題が
ある。Furthermore, the above-mentioned method (2) requires oxygen-enriched combustion air or oxygen, which poses a problem from the viewpoint of resource and energy conservation.
そこで、本発明の目的は、かがる上記問題点を解消し、
低カロリーガスと燃焼用空気を良好にＩＮ１合させ、安
定燃焼させる低カロリーガスの燃焼装置を提供するもの
である。Therefore, the purpose of the present invention is to solve the above-mentioned problems,
The present invention provides a low-calorie gas combustion device that satisfies the IN1 combination of low-calorie gas and combustion air and performs stable combustion.
本発明は、上記目的を達成するため、安定燃焼させる低
カロリーガスの燃焼装置の構成として、燃焼用空気流路
と燃焼流路を同心又は同軸に配置したバーナ先端部に、
当該バーナ径より大径部とこれに連結したバーナ径より
縮径された噴出口とで構成される筒状保炎器を設けた構
成を採用したものである。In order to achieve the above object, the present invention has a configuration of a combustion device for stably burning low-calorie gas, in which a combustion air flow path and a combustion flow path are arranged concentrically or coaxially at the tip of a burner.
A configuration is adopted in which a cylindrical flame stabilizer is formed of a diameter portion larger than the burner diameter and a spout port connected to the diameter portion smaller in diameter than the burner diameter.
〔作用］
本発明の燃焼装置は前掲の構成としたことがら、低カロ
リーガスは、内管内を送通する燃焼用空気と短時間で混
合する。更に、混合された低カロリーガスと燃焼用空気
は、旋回羽根でさらに混合が促進されると同時に、燃焼
用空気流路の閉塞した先端中心部は効果的に混合領域を
形成する。[Function] Since the combustion device of the present invention has the above-mentioned configuration, the low-calorie gas mixes with the combustion air flowing through the inner tube in a short time. Furthermore, mixing of the mixed low-calorie gas and combustion air is further promoted by the swirl vanes, and at the same time, the central portion of the closed end of the combustion air flow path effectively forms a mixing region.
また、火炎の広がりを確保して、バーナ先端の熱放散を
抑えるようにしているから、高温度が維持され高温の還
流領域が形成され、低カロリーガスであっても安全に燃
焼させることができる。In addition, since the flame spread is ensured and heat dissipation at the burner tip is suppressed, a high temperature is maintained and a high temperature reflux region is formed, allowing even low-calorie gas to be burned safely. .
即ち、混合予熱帯では低カロリーガスと燃焼用空気の混
合を充分に行なえる構造とし、さらに混合後の反応帯で
は、混合の促進を効果的に行う構造としたので、安定し
て燃焼が継続する。In other words, the premixing zone has a structure that allows sufficient mixing of low-calorie gas and combustion air, and the post-mixing reaction zone has a structure that effectively promotes mixing, allowing stable combustion to continue. do.
以Ｆ、図面を参照して本発明の第一実施例に基づいて説
明する。Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.
第１図は本発明の低カロリーガスの燃焼装置の断面構造
を示すもので、図示のように燃焼装置のバーナ本体（１
）の軸芯側より、燃焼用空気流路（２）が、外管側には
高炉ガスなどの低カロリーガス流路（３）が同芯状に配
設した二重管で形成されている。燃焼用空気流Ｉ’（２
）の先端近傍部は、高炉ガスと燃焼用空気の混合が充分
になるよう周方向全面に所定間隔に複数個の貫通孔（４
）を配している。また前記燃焼用空気流路（２）のの先
端部は閉塞していて、低カロリーガス流路（３）と燃焼
用空気流路（２）内には、各流体を旋回させ得る旋回羽
根（５）が設けられ、また前記の（２）、（３）の先端
部外周には、その管径より大きく吐出口に向かって縮径
した筒状の保炎器（６）が設けられている。FIG. 1 shows the cross-sectional structure of the low-calorie gas combustion device of the present invention. As shown in the figure, the burner body (1
) is formed of a double tube in which a combustion air flow path (2) is arranged concentrically from the axial center side, and a low calorie gas flow path (3) such as blast furnace gas is arranged concentrically from the outer tube side. . Combustion air flow I'(2
) has a plurality of through holes (4
) are arranged. Further, the tip of the combustion air flow path (2) is closed, and the low calorie gas flow path (3) and the combustion air flow path (2) are provided with swirl vanes (2) that can swirl each fluid. 5), and a cylindrical flame stabilizer (6) whose diameter is larger than the pipe diameter and decreases toward the discharge port is provided on the outer periphery of the tip of the above-mentioned (2) and (3). .
尚、前記の保炎器を設けないと、循環領域は形成されず
熱放散が大きくなって炎の吹飛びが著しく、燃焼は安定
しない。又上述の燃焼用空気流路（２）の先端近傍に配
した貫通孔の径寸法は、混合促進のために燃焼用空気の
流速が、低カロリーガスの流速より３乃至４倍となるよ
うに決めるのが好ましい。If the flame stabilizer is not provided, no circulation area will be formed and heat dissipation will increase, resulting in significant flame blow-off and unstable combustion. In addition, the diameter of the through hole placed near the tip of the combustion air flow path (2) mentioned above is such that the flow rate of the combustion air is 3 to 4 times the flow rate of the low-calorie gas to promote mixing. It is preferable to decide.
上記第一実施例の構造に代えて、第２図ＡＢに示すごと
く、低カロリーガスと燃焼用空気を放射状にし、バーナ
本体内で交互に噴出して混合を促進する構造にしてもよ
い、又第３図ＡＢに示すごとく各流路の先端部に閉塞板
（７）を形成してもよい。Instead of the structure of the first embodiment, as shown in FIG. 2AB, a structure may be adopted in which low-calorie gas and combustion air are radially ejected alternately within the burner body to promote mixing. A closing plate (7) may be formed at the tip of each channel as shown in FIG. 3AB.
次に、本発明の低カロリーガスの燃焼装置の構造を用い
た場合と、従来構造を用いた場合での混合特性結果につ
いて、第４図で詳述する。Next, the results of mixing characteristics when using the structure of the low calorie gas combustion device of the present invention and when using the conventional structure will be explained in detail with reference to FIG.
第４図で明らかなように、燃料ガス濃度プロフィールを
見てみると、従来構造では低カロリーガスと燃焼用空気
との相対流速、旋回羽根の角度にかかわらず、燃焼用空
気内のガス濃度が低く、混合性はあまり改訂されていな
い。As is clear from Figure 4, when looking at the fuel gas concentration profile, in the conventional structure, the gas concentration in the combustion air remains constant regardless of the relative flow velocity between the low-calorie gas and the combustion air and the angle of the swirl vane. low, and the mixability has not been revised much.
ここで燃料ガス濃度プロフィールの見方について説明す
ると、ガス濃度はいずれも点線上での濃度分布を表した
ものであるが、低カロリーガスと燃焼用空気とが同一体
積であるならば、分布曲線の全体が５０％に近づくにつ
れて混合が促進されていることになる。Here, to explain how to read the fuel gas concentration profile, all gas concentrations represent the concentration distribution on the dotted line, but if the low calorie gas and combustion air have the same volume, the distribution curve Mixing is promoted as the total approaches 50%.
一方、本発明の低カロリーガスの燃焼装置の構造では、
従来構造と比較して全体が５０％に近づいており、混合
促進していることが認められる。 ・本発明は、低カロ
リーガスを安定して燃焼させるために、低カロリーガス
と燃焼用空気の混合を充分に行うこと、バーナ先端の還
流領域を大きくとり、周囲流への火炎の広がりを確保す
ること、更に、バーナ先端近傍の熱放散を１１１１え、
温度を高く保つことを条件に第１図に示す保炎器を設け
た構造とした。On the other hand, in the structure of the low calorie gas combustion device of the present invention,
Compared to the conventional structure, the total ratio is close to 50%, and it is recognized that mixing is promoted.・In order to stably burn low-calorie gas, the present invention requires sufficient mixing of low-calorie gas and combustion air, and a large reflux area at the tip of the burner to ensure flame spread to the surrounding flow. Furthermore, the heat dissipation near the burner tip is improved by 1111,
In order to keep the temperature high, we adopted a structure with a flame stabilizer shown in Figure 1.
これら上記の条件が実現しているかの確認として火炎流
れの数値シミュレーションを実施した結果、第５図の温
度分布（Ｋ）に示すように高温のＶＩ４環領域が形成し
ており、又第６図の可燃成分濃度プロフィールからも、
可燃成分濃度が高（なっており、火炎を効果的に伝播し
、安定した燃焼 の継続ができることが判った。As a result of carrying out a numerical simulation of flame flow to confirm whether these above-mentioned conditions were realized, a high-temperature VI4 ring region was formed as shown in the temperature distribution (K) in Fig. 5, and as shown in Fig. 6. From the combustible component concentration profile of
It was found that the concentration of combustible components was high, which allowed for effective flame propagation and continued stable combustion.
以上、説明したように、本発明によれば低カロリーガス
と燃焼用空気を良好に混合させる構造としたものである
から、従来の構造とは異なり、高炉ガスなどの低カロリ
ーガスを、効率良く、安定した燃焼ができるものである
。As explained above, the present invention has a structure that mixes low-calorie gas and combustion air well, so unlike conventional structures, it is possible to efficiently mix low-calorie gas such as blast furnace gas. , capable of stable combustion.
勿論、他の低カロリーガスを燃焼する場合においても、
速やかに燃焼用空気と混合が促進され良好な火炎を形成
することができる。Of course, even when burning other low calorie gases,
Mixing with combustion air is quickly promoted and a good flame can be formed.
第１図は本発明の低カロリーガスの燃焼装置の断面構造
を示す図、第２図ＡＢは本発明の第二実施例の断面構造
を示す図であって、第２図Ａは正面断面図、第２図Ｂは
Ｘ矢示に沿う断面図、第３図ＡＢは本発明の第三実施例
の断面構造を示す図であって、第３図Ａは正面断面図、
第３図ＢはＹ矢示に沿う断面図、第４図は混合特性結果
を示す図、第５図、第６図は本発明装置による数値シミ
ュレーション結果を示す図、第７図、第８図ＡＢは従来
の低カロリーガスを燃焼する方法を示す図である。
（＋）・・バーナ本体、（２）・・燃焼用空気流路、（
３）・・低カロリーガス流路、（４）・・貫通孔、（５
）・・旋回羽根、（６）・・保炎器、（７）・・閉塞板
、特許出願人 法式会社 神戸製鋼所
代 理 人 弁理士 金丸 章−
１，２１面の神嚇
第４図
第５図 第６図
温度分布ｆＫ） 可燃成分濃度プロ
２イール第７図
炉
６、補正の対象FIG. 1 is a diagram showing a cross-sectional structure of a low-calorie gas combustion apparatus of the present invention, FIG. 2 AB is a diagram showing a cross-sectional structure of a second embodiment of the present invention, and FIG. 2A is a front cross-sectional view. , FIG. 2B is a sectional view along the X arrow, FIG. 3AB is a diagram showing a sectional structure of a third embodiment of the present invention, and FIG. 3A is a front sectional view.
FIG. 3B is a cross-sectional view taken along the Y arrow, FIG. 4 is a diagram showing the results of mixing characteristics, FIGS. 5 and 6 are diagrams showing the results of numerical simulation using the device of the present invention, and FIGS. AB is a diagram showing a conventional method of burning low-calorie gas. (+)...burner body, (2)...combustion air flow path, (
3)...Low calorie gas flow path, (4)...Through hole, (5
)...Swivel vane, (6)...Flame stabilizer, (7)...Closure plate, Patent applicant: Legal company: Kobe Steel, Ltd. Representative: Patent attorney: Akira Kanamaru Fig. 5 Fig. 6 Temperature distribution fK) Combustible component concentration PRO 2 Eel Fig. 7 Furnace 6, subject of correction
Claims (1)
ーナ先端部に、当該バーナ径より大径部とこれに連結し
たバーナ径より縮径された噴出口とで構成される筒状保
炎器を設けたことを特徴とする低カロリーガスの燃焼装
置。A cylindrical piece consisting of a burner tip with a combustion air flow path and a combustion flow path arranged concentrically or coaxially, and a part with a diameter larger than the burner diameter and a spout port connected to this with a diameter smaller than the burner diameter. A low-calorie gas combustion device characterized by being equipped with a flame holder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1126195A JP2513839B2 (en) | 1989-05-19 | 1989-05-19 | Low calorie gas combustion equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1126195A JP2513839B2 (en) | 1989-05-19 | 1989-05-19 | Low calorie gas combustion equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02306009A true JPH02306009A (en) | 1990-12-19 |
| JP2513839B2 JP2513839B2 (en) | 1996-07-03 |
Family
ID=14929053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1126195A Expired - Fee Related JP2513839B2 (en) | 1989-05-19 | 1989-05-19 | Low calorie gas combustion equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2513839B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4231866A1 (en) * | 1991-09-24 | 1993-04-01 | Kobe Steel Ltd | BURNER AND METHOD FOR BURNING GAS WITH A LOW FIRE VALUE |
| JP2011106802A (en) * | 2009-10-22 | 2011-06-02 | Jfe Steel Corp | Method of burning gas of low calorific value by combustion burner and method of operating blast furnace |
| JP2011106803A (en) * | 2009-10-22 | 2011-06-02 | Jfe Steel Corp | Method of burning blast furnace gas by combustion burner, and method of operating blast furnace |
| JP2016031200A (en) * | 2014-07-30 | 2016-03-07 | 日立造船株式会社 | Combustion method of gas burner for low calorie gas, and gas burner for low calorie gas |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5254043U (en) * | 1975-10-17 | 1977-04-18 | ||
| JPS583164A (en) * | 1981-06-29 | 1983-01-08 | Nec Corp | Magnetic disc device |
-
1989
- 1989-05-19 JP JP1126195A patent/JP2513839B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5254043U (en) * | 1975-10-17 | 1977-04-18 | ||
| JPS583164A (en) * | 1981-06-29 | 1983-01-08 | Nec Corp | Magnetic disc device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4231866A1 (en) * | 1991-09-24 | 1993-04-01 | Kobe Steel Ltd | BURNER AND METHOD FOR BURNING GAS WITH A LOW FIRE VALUE |
| AU656806B2 (en) * | 1991-09-24 | 1995-02-16 | Kabushiki Kaisha Kobe Seiko Sho | Burner and method for burning low calorific gas |
| DE4231866C2 (en) * | 1991-09-24 | 1999-04-01 | Kobe Steel Ltd | Burner for gas and method of burning gas with this burner |
| JP2011106802A (en) * | 2009-10-22 | 2011-06-02 | Jfe Steel Corp | Method of burning gas of low calorific value by combustion burner and method of operating blast furnace |
| JP2011106803A (en) * | 2009-10-22 | 2011-06-02 | Jfe Steel Corp | Method of burning blast furnace gas by combustion burner, and method of operating blast furnace |
| JP2016031200A (en) * | 2014-07-30 | 2016-03-07 | 日立造船株式会社 | Combustion method of gas burner for low calorie gas, and gas burner for low calorie gas |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2513839B2 (en) | 1996-07-03 |
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