JPH05203115A - Method and device for burning liquid fuel - Google Patents
Method and device for burning liquid fuelInfo
- Publication number
- JPH05203115A JPH05203115A JP1450192A JP1450192A JPH05203115A JP H05203115 A JPH05203115 A JP H05203115A JP 1450192 A JP1450192 A JP 1450192A JP 1450192 A JP1450192 A JP 1450192A JP H05203115 A JPH05203115 A JP H05203115A
- Authority
- JP
- Japan
- Prior art keywords
- combustion
- liquid fuel
- fuel
- froth
- porous
- 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
Landscapes
- Evaporation-Type Combustion Burners (AREA)
- Spray-Type Burners (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は家庭用石油ストーブから
工業窯炉までの幅広い範囲における液体燃料を泡沫化し
て燃焼させる方法およびその装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for foaming and burning liquid fuel in a wide range from household petroleum stoves to industrial kilns.
【０００２】[0002]
【従来の技術】燃料を直接気化して燃焼させる蒸発燃焼
は、燃焼前に燃料蒸気と空気を均質な混合気体にできる
ので、燃焼負荷率が高く、すすが発生しにくいなどの利
点をもつ反面、燃料の比表面積が小さいので燃焼の準備
（蒸発）過程に要する時間が大きく応答性が悪くなる。
また、霧化した燃料を燃焼させる噴霧燃焼は、火炎中に
液相と気相が共存するような不均質系の燃焼になるので
一般に蒸発、拡散などの物質輸送過程が燃焼反応を支配
して、燃焼負荷率をあまり高くすることができない。こ
れに対して、気泡分散燃焼（泡化燃焼）は液体燃料の薄
膜を連続相として蒸発させるので蒸発燃焼と同様に均質
な混合気で燃焼できるとともに、燃料の比表面積を飛躍
的に増加できることから応答性も改善できる。2. Description of the Related Art Evaporative combustion, in which fuel is directly vaporized and burned, can produce a homogeneous mixed gas of fuel vapor and air before combustion, so that it has the advantages of high combustion load factor and less soot generation. Since the specific surface area of the fuel is small, the time required for the combustion preparation (evaporation) process is large and the responsiveness deteriorates.
In addition, since atomized combustion in which atomized fuel is burned is a non-homogeneous system in which a liquid phase and a gas phase coexist in a flame, mass transfer processes such as evaporation and diffusion generally control the combustion reaction. However, the combustion load factor cannot be made too high. On the other hand, since bubble dispersion combustion (foaming combustion) evaporates a thin film of liquid fuel as a continuous phase, it can burn with a homogeneous mixture like evaporative combustion, and can dramatically increase the specific surface area of fuel. The responsiveness can also be improved.
【０００３】本発明者等は特開平２−２１１０６号、特
開平２−２５９３１１号公報に示されるような泡化燃焼
方法を提起したが、いずれも所定量の液体燃料を溜めて
そこへ多孔質エレメントを介して空気を供給し、燃料を
泡沫化して燃焼させる方式をとっていた。The inventors of the present invention have proposed a foaming combustion method as shown in JP-A-2-21106 and JP-A-2-259311. In both cases, a predetermined amount of liquid fuel is stored and the porous fuel is stored therein. Air was supplied through the element, and the fuel was foamed and burned.
【０００４】従って、燃焼器を横向きにしたり下向きに
して使用することが困難であった。また、最大燃焼量２
０，０００kcal／hrの石油ストーブではターンダウン比
が約１／５で、ガス燃焼に比べてまだ範囲が狭い。更
に、燃焼量を大燃焼から小燃焼に切り換えた時の多孔質
エレメント上に溜まった燃料が小燃焼に見合う量まで減
少するのに時間がかかるので応答が遅いという課題もあ
った。Therefore, it has been difficult to use the combustor sideways or downward. Also, the maximum combustion amount 2
With an oil stove of 50,000 kcal / hr, the turndown ratio is about 1/5, which is still a narrow range compared to gas combustion. Further, when the combustion amount is switched from the large combustion to the small combustion, it takes time to reduce the amount of fuel accumulated on the porous element to an amount commensurate with the small combustion, resulting in a problem that the response is slow.
【０００５】[0005]
【発明が解決しようとする課題】本発明は燃焼器の設置
姿勢に影響されることなく泡化燃焼が安定し、かつ燃焼
量制御の応答性に優れた液体燃料の燃焼方法およびその
装置を提供するものである。DISCLOSURE OF THE INVENTION The present invention provides a liquid fuel combustion method and a device thereof, in which bubble combustion is stable without being influenced by the installation posture of a combustor and the responsiveness of combustion amount control is excellent. To do.
【０００６】[0006]
【課題を解決するための手段および作用】本発明は燃焼
器に泡生成器を接続してなる液体燃料の泡化燃焼方法に
おいて、泡生成器に内設する複数個の多孔質エレメント
間で燃料を泡化してそのまま最下流の多孔質エレメント
に供給して燃焼する液体燃料の燃焼方法である。SUMMARY OF THE INVENTION The present invention relates to a liquid fuel foaming combustion method in which a bubble generator is connected to a combustor, and a fuel is provided between a plurality of porous elements provided in the bubble generator. Is a method of burning a liquid fuel in which the gas is foamed and supplied as it is to the most downstream porous element for combustion.
【０００７】更に本発明は燃焼器に泡生成器を接続して
なる液体燃料の泡化燃焼装置において、筒状の泡生成器
に直列に多孔質エレメントを２段に内設し、多孔質エレ
メント間に燃料の供給口を設け、最上流の多孔質エレメ
ント上流側に発泡用空気口を取り付けた液体燃料の燃焼
装置であり、必要により最上流の多孔質エレメント上流
側に発泡用空気口と燃料供給口の両方を取り付け又は多
孔質エレメント間に燃焼用空気供給口を設けた液体燃料
の燃焼装置である。Further, according to the present invention, in a liquid fuel foaming combustion apparatus in which a foam generator is connected to a combustor, a porous element is installed in two stages in series with a cylindrical foam generator, This is a liquid fuel combustion device in which a fuel supply port is provided between them and a foaming air port is attached to the upstream side of the most upstream porous element. This is a liquid fuel combustion apparatus in which both supply ports are attached or a combustion air supply port is provided between porous elements.
【０００８】ここで最上流又は最下流の多孔質エレメン
トとは、燃焼器における燃料の流れにより特定されるも
のとする。本発明は液体燃料を多孔質エレメント上に溜
めないで燃料を泡沫化燃焼させるが、燃焼に必要な量だ
けの燃料を２枚の多孔質エレメント間で泡化して、燃焼
器に繋がる最下流の多孔質エレメントに泡化燃料を供給
する。従って、燃焼器が横向きでも下向きでも多孔質エ
レメントからの燃料の滴りや偏りをなくして、安定した
燃焼を継続することができる。Here, the most upstream or most downstream porous element is specified by the flow of fuel in the combustor. In the present invention, the liquid fuel is foamed and burned without accumulating the liquid fuel on the porous element. However, only the amount of fuel necessary for combustion is foamed between the two porous elements, and the most downstream portion connected to the combustor is connected. Foaming fuel is supplied to the porous element. Therefore, regardless of whether the combustor is facing sideways or downward, it is possible to maintain stable combustion by eliminating dripping and uneven distribution of fuel from the porous element.
【０００９】また、本発明を従来の泡化石油ストーブに
適用した場合のターンダウン比は、微少燃焼でも安定し
た燃料の泡化供給ができるので、燃料蒸気と空気の混合
性に優れ安定燃焼が可能となる。また、燃料が多孔質エ
レメント上に溜まらないので、燃焼量変化に対する応答
性も早い。Further, when the present invention is applied to a conventional foamed petroleum stove, the turndown ratio enables stable foaming and supply of the fuel even with minute combustion, so that excellent mixing performance of fuel vapor and air is achieved and stable combustion is achieved. It will be possible. Further, since the fuel is not accumulated on the porous element, the response to the change in the combustion amount is fast.
【００１０】以下本発明を図面について説明する。図１
は本発明の実施態様例を示すもので、１は燃焼器、２は
泡生成器、３は燃焼器に露出する最下流の多孔質エレメ
ント、４は最上流の多孔質エレメント、５は燃料の供給
管、６は発泡用空気供給管、８は燃焼用二次空気管であ
る。９は風箱、１０は点火用ヒータ、１１はバッフル板
である。The present invention will be described below with reference to the drawings. Figure 1
1 shows an embodiment of the present invention, 1 is a combustor, 2 is a bubble generator, 3 is the most downstream porous element exposed to the combustor, 4 is the most upstream porous element, and 5 is fuel. A supply pipe, 6 is an air supply pipe for foaming, and 8 is a secondary air pipe for combustion. Reference numeral 9 is a wind box, 10 is an ignition heater, and 11 is a baffle plate.
【００１１】本発明における多孔質エレメントは平均気
孔径が１〜２００μｍとし、発泡用気体が多孔質エレメ
ントを通過する空塔速度を０．０１〜１ｍ／秒とする。
多孔質エレメントは、密度４〜６gr／cm3 、空隙率３５
〜４５％の焼結金属や、密度２〜５gr／cm3 、気孔率１
５〜４５％のセラミックス体が使用される。The porous element in the present invention has an average pore diameter of 1 to 200 μm, and the superficial velocity of the foaming gas passing through the porous element is 0.01 to 1 m / sec.
The porous element has a density of 4 to 6 gr / cm 3 , and a porosity of 35.
~ 45% sintered metal, density 2 ~ 5gr / cm 3 , porosity 1
A ceramic body of 5 to 45% is used.
【００１２】本発明により、燃料は多孔質エレメント間
７で泡化され、最下流の多孔質エレメント３には泡化燃
料を均一に供給できるので、燃焼量の大小に関係なく燃
料蒸気と空気の均一混合性が改善され、広範囲火力調整
が容易にでき、ターンダウン比もガス燃焼並の約１／１
０が容易に達成できる。According to the present invention, the fuel is foamed between the porous elements 7 and the foamed fuel can be uniformly supplied to the most downstream porous element 3, so that the fuel vapor and the air are irrespective of the combustion amount. Improved uniform mixing, easy adjustment of wide-range thermal power, and turndown ratio of about 1/1 of gas combustion
0 can be easily achieved.
【００１３】図２は本発明の他の実施態様例を示すもの
で、最上流の多孔質エレメント４の上流に燃料の供給管
５と発泡用空気供給管６の両方を設置して、最上流の多
孔質エレメント４に燃料と空気を同時に供給して多孔質
エレメント間７に泡化燃料を生成する。FIG. 2 shows another embodiment of the present invention, in which both the fuel supply pipe 5 and the foaming air supply pipe 6 are installed upstream of the most upstream porous element 4. The fuel and air are simultaneously supplied to the porous elements 4 to generate the bubbled fuel between the porous elements 7.
【００１４】この泡化燃料は直ちに最下流の多孔質エレ
メント３に供給されるので、燃焼器を下向きにしても安
定燃焼が可能である。また、横向燃焼器での燃焼も容易
に行える。Since this bubbling fuel is immediately supplied to the most downstream porous element 3, stable combustion is possible even when the combustor faces downward. Further, the combustion in the horizontal combustor can be easily performed.
【００１５】図３は本発明の更に別の実施態様例を示す
もので、多孔質エレメント間７に燃焼用二次空気管８を
設けたものである。FIG. 3 shows still another embodiment of the present invention, in which a secondary air pipe 8 for combustion is provided between the porous elements 7.
【００１６】このように構成することにより、定常燃焼
時の燃料空気と燃焼用空気の混合性を改善し、火炎長さ
を変えたり、ＮＯｘ生成量を制御するのに有効である。
また、消火時には燃料を止めると同時に燃焼用二次空気
を供給することで、より消火特性を改善する効果があ
る。With such a configuration, it is effective to improve the mixing property of the fuel air and the combustion air during steady combustion, change the flame length, and control the NOx production amount.
Further, when the fire is extinguished, the fuel is stopped and at the same time the secondary air for combustion is supplied, which has the effect of further improving the fire extinguishing characteristics.
【００１７】本発明においては前述の通り平均気孔径
（目開径）は１〜２００μｍが使用されるが、１００μ
ｍ〜２００μｍの多孔質エレメントを使用する場合に
は、下流側の多孔質エレメントは１〜１００μｍのもの
を用いることが好ましい。In the present invention, the average pore diameter (opening diameter) is 1 to 200 μm as described above, but 100 μm
When using a porous element of m to 200 μm, it is preferable to use a porous element on the downstream side of 1 to 100 μm.
【００１８】[0018]
【発明の効果】本発明は泡生成器に多孔質エレメントを
複数個内設して、燃焼器に露出する最下流の多孔質エレ
メントに燃料を泡化して供給するので、燃焼器の設置姿
勢に影響されることなく、燃焼器での泡化燃焼が安定
し、火力調整範囲はガス燃焼並のターンダウン比約１／
１０が可能である。また、燃焼器に露出する最下流の多
孔質エレメント上に燃料が溜まらないので、燃焼量制御
の応答性も極めて良好である。According to the present invention, a plurality of porous elements are provided inside the bubble generator and the fuel is bubbled and supplied to the most downstream porous element exposed to the combustor. Bubbling combustion in the combustor is stable without being affected, and the thermal power adjustment range is about 1 / turn ratio similar to gas combustion.
10 is possible. In addition, since fuel does not accumulate on the most downstream porous element exposed to the combustor, the responsiveness of combustion amount control is also very good.
【図１】本発明の説明図である。FIG. 1 is an explanatory diagram of the present invention.
【図２】本発明の他の例の説明図である。FIG. 2 is an explanatory diagram of another example of the present invention.
【図３】本発明の更に他の例の部分説明図である。FIG. 3 is a partial explanatory diagram of still another example of the present invention.
１ 燃焼器 ２ 泡生成器 ３ 最下流の多孔質エレメント ４ 最上流の多孔質エレメント ５ 燃料の供給管 ６ 発泡用空気供給管 ７ 多孔質エレメントで形成される空間 ８ 燃焼用二次空気管 DESCRIPTION OF SYMBOLS 1 Combustor 2 Bubble generator 3 The most downstream porous element 4 The most upstream porous element 5 Fuel supply pipe 6 Foaming air supply pipe 7 Space formed by porous elements 8 Secondary air pipe for combustion
Claims (4)
料の泡化燃焼方法において、泡生成器に内設する複数個
の多孔質エレメント間で燃料を泡化してそのまま最下流
の多孔質エレメントに供給して燃焼することを特徴とす
る液体燃料の燃焼方法。1. A method for foaming combustion of a liquid fuel, comprising a foam generator connected to a combustor, wherein the fuel is foamed between a plurality of porous elements provided inside the foam generator, and the downstreammost porous material is used as it is. A method for burning a liquid fuel, characterized in that the fuel is supplied to a quality element and burned.
料の泡化燃焼装置において、筒状の泡生成器に直列に多
孔質エレメントを２段に内設し、多孔質エレメント間に
燃料の供給口を設け、最上流の多孔質エレメント上流側
に発泡用空気口を取り付けたことを特徴とする液体燃料
の燃焼装置。2. A liquid fuel foaming combustion apparatus comprising a combustor connected to a foam generator, wherein porous elements are provided in two stages in series with a cylindrical foam generator, and between the porous elements. A liquid fuel combustion apparatus, characterized in that a fuel supply port is provided and a bubbling air port is attached upstream of the most upstream porous element.
用空気口と燃料供給口の両方を取り付けたことを特徴と
する請求項２記載の液体燃料の燃焼装置。3. The liquid fuel combustion apparatus according to claim 2, wherein both the bubbling air port and the fuel supply port are attached on the upstream side of the most upstream porous element.
を設けたことを特徴とする請求項２又は３記載の液体燃
料の燃焼装置。4. The liquid fuel combustion apparatus according to claim 2, wherein a combustion air supply port is provided between the porous elements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4014501A JP3065763B2 (en) | 1992-01-30 | 1992-01-30 | Liquid fuel combustion equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4014501A JP3065763B2 (en) | 1992-01-30 | 1992-01-30 | Liquid fuel combustion equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05203115A true JPH05203115A (en) | 1993-08-10 |
| JP3065763B2 JP3065763B2 (en) | 2000-07-17 |
Family
ID=11862812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4014501A Expired - Fee Related JP3065763B2 (en) | 1992-01-30 | 1992-01-30 | Liquid fuel combustion equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3065763B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008516185A (en) * | 2004-10-13 | 2008-05-15 | ベバスト・アクチィエンゲゼルシャフト | Burner device containing porous material |
| JP2013238243A (en) * | 2009-09-30 | 2013-11-28 | Ihi Corp | Ignition device |
| US9395083B2 (en) | 2009-09-30 | 2016-07-19 | Ihi Corporation | Ignition device |
-
1992
- 1992-01-30 JP JP4014501A patent/JP3065763B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008516185A (en) * | 2004-10-13 | 2008-05-15 | ベバスト・アクチィエンゲゼルシャフト | Burner device containing porous material |
| JP2013238243A (en) * | 2009-09-30 | 2013-11-28 | Ihi Corp | Ignition device |
| US9395083B2 (en) | 2009-09-30 | 2016-07-19 | Ihi Corporation | Ignition device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3065763B2 (en) | 2000-07-17 |
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|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
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