JP3595418B2 - Gas fuel in liquid combustion system - Google Patents
Gas fuel in liquid combustion system Download PDFInfo
- Publication number
- JP3595418B2 JP3595418B2 JP24327296A JP24327296A JP3595418B2 JP 3595418 B2 JP3595418 B2 JP 3595418B2 JP 24327296 A JP24327296 A JP 24327296A JP 24327296 A JP24327296 A JP 24327296A JP 3595418 B2 JP3595418 B2 JP 3595418B2
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- Prior art keywords
- liquid
- gaseous fuel
- combustion
- water
- mixed gas
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Description
【０００１】
【発明の属する技術分野】
本発明は、液体の加熱、液体中反応の促進などのために液体中で気体燃料を燃焼させる液体中燃焼装置に関する。
【０００２】
【従来の技術】
気体燃料を液体中で燃焼させ、発生する燃焼熱で直接その液体を内部から加熱する装置に関しては、従来技術は見当たらない。
【０００３】
【発明が解決しようとする課題】
本発明は、液体中で気体燃料を燃焼させ、その燃焼熱で直接液体の温度を効率良く上昇させることのできる気体燃料の液体中燃焼装置を提供することを課題としている。
【０００４】
【課題を解決するための手段】
本発明は、前記課題を解決するため、気体燃料と酸素とを混合する混合器、同混合器からの混合ガスを燃焼容器内の液体中に微細気泡として放出する気体放出装置、及びその燃焼容器内の液体中に音波を発生させ同液体中の前記微細気泡に爆縮を発生させるための音波発生器を有する気体燃料の液体中燃焼装置を提供する。
【０００５】
本発明による気体燃料の液体中燃焼装置における気体放出装置は、気体燃料と適量の酸素ガスとを混合した混合ガスを液体中に直径が数百μｍ 以下の微細気泡として放出する。
液体中での気体燃料と酸素ガスの混合気体の微細気泡は、直径が数百μｍ 以下であるため、気泡の形状はほぼ真球となる。
【０００６】
一方、音波発生器からは、気体燃料と酸素ガスの混合気体の微細気泡を含む液体に、百数十デシベル以上の強い音波を加える。このように微細気泡を含む液体に強い音波を加えると、音波が液体中を伝播し、微細気泡の表面に均等に音圧が加わる。
【０００７】
気泡表面は、加えられた音圧により、均等に収縮し、微細気泡内では、気泡表面の収縮によって球面状衝撃波が形成される。形成された球面状衝撃波は、気泡の中心に向かって収縮し、気泡の中心部で爆発（爆縮）が起こる。
【０００８】
球面状衝撃波の爆縮によって、微細気泡の中心部付近では、混合気体の温度が数万ケルビン以上となり極端に上昇し、この温度上昇によって混合気体は燃焼する。混合気体の燃焼に伴って燃焼熱が発生し、この燃焼熱で液体が加熱される。
【０００９】
なお、本発明による液体中燃焼装置で用いる気体燃料としては、水素、一酸化炭素、メタン、アセチレン、エチレン、エタン、プロピレン、プロパン、１−ブチレン、ｎ−ブタン、ベンゼン、炭化水素などがあり、また、液体の代表的なものとしては水がある。
【００１０】
以上説明した微細気泡内での球面状衝撃波の発生と、爆縮、及び気泡内混合気体の温度上昇を模式的に図２〜図４に示してあり、以下、これについて説明する。
図２〜図４において、（ａ）図は気泡の状態を示し、（ｂ）図は気泡内における温度変化をそれぞれ示している。
【００１１】
図２は、液体中の混合気体の微細気泡１に音圧２が加わり、微細気泡内に球面状衝撃波３が発生した状況を示す。微細気泡内を中心に向かって収縮する球面状衝撃波は、図３に示すように、収縮するに従いその強度が増加するため、衝撃波背後の混合気体温度も上昇する。球面状衝撃波が、図４に示すように、微細気泡の中心付近で爆縮すると、微細気泡の中心付近には超高温領域５が形成される。
【００１２】
なお、水中の気泡に或る値以上の音圧を加えた場合、気泡の内部に球面状衝撃波が形成され、その爆縮により中心付近に超高温領域が形成される現象は、公知である。本発明は、この爆縮によって発生する超高温領域を利用して、気体燃料を液体中で燃焼させる装置を提供している。
【００１３】
【発明の実施の形態】
以下、本発明による気体燃料の液体中燃焼装置を図１に示した実施の一形態に基づいて具体的に説明する。図１の液体中燃焼装置は、水中で気体燃料を燃焼させることにより水の温度を上昇させる装置に本発明を適用したものである。
【００１４】
図１に示した装置は、気体燃料タンク６、酸素タンク７、気体燃料と酸素の混合器８、気体燃料と酸素の混合気体を燃焼容器９に供給するためのコンプレッサ１０、混合気体を燃焼容器に注入する際に微細気泡化するための微細気泡発生装置１１を備えている。
また、図１の装置は、燃焼容器９内の液体（この場合は水）に注入された微細気泡に音圧を加えるために燃焼容器９に接続した音波発生器１２及び音波発生器コントローラ１３と電源１４を備えている。
【００１５】
更に、燃焼容器に水１５を供給するための水供給ポンプ１６、燃焼容器内で加熱した水を所要の機器へ供給するための加熱水供給管１７、及び、気体燃料用のバルブ１８、酸素タンク用のバルブ１９、混合気体供給用のバルブ２０、水供給用のバルブ２１などから構成される。
【００１６】
以上の構成をもつ図１の装置において、気体燃料は、酸素と混合器８で混合され、コンプレッサ１０で微細気泡発生装置１１を介して燃焼容器９へ供給される。一方、水は、水供給ポンプ１６により燃焼容器９へ供給される。
【００１７】
燃焼容器９内では、水中に混合気体の微細気泡が存在した状態となる。この状態で音波発生器１２で音圧を加えると、先に説明したように微細気泡内で球面状衝撃波が爆縮して、気泡が燃焼し、燃焼熱が放出され水の温度が上昇する。
温度が上昇した水は、加熱水供給管１７により各種の機器へ供給される。なお、混合気体と水の供給、微細気泡の燃焼は連続して行う。
【００１８】
【発明の効果】
以上説明したように、本発明によれば液体中で気体燃料の燃焼を可能とした装置が提供される。そして本発明による装置では、液体中での内部燃焼となるため従来の気体燃料を使用した加熱装置（外部燃焼）に対し、加熱効率が格段に向上する。
このため、本発明により、高効率の液体（水）加熱装置、ボイラ等の開発が可能となる。
【図面の簡単な説明】
【図１】本発明の実施の一形態による気体燃料の液体中燃焼装置を示す構成図。
【図２】液体中での気体燃料と酸素の混合ガスの微細気泡において、音圧を加えることにより、微細気泡内部に球面状衝撃波が発生する状態を示した説明図。
【図３】球面状衝撃波が微細気泡内を中心に向って収縮してゆく状態を示した説明図。
【図４】爆縮して微細気泡の中心部に超高温領域が形成される状態を示した説明図。
【符号の説明】
６ 気体燃料タンク
７ 酸素タンク
８ 混合器
９ 燃焼容器
１０ コンプレッサ
１１ 微細気泡発生装置
１２ 音波発生器
１３ 音波発生器コントローラ
１４ 電源
１５ 液体（水）
１６ 水供給ポンプ
１７ 加熱水供給管
１８ 気体燃料用のバルブ
１９ 酸素タンク用のバルブ
２０ 混合気体供給用のバルブ
２１ 水供給用のバルブ[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an in-liquid combustion device for burning a gaseous fuel in a liquid for heating the liquid, promoting a reaction in the liquid, and the like.
[0002]
[Prior art]
No prior art has been found for an apparatus that burns a gaseous fuel in a liquid and directly heats the liquid from the inside with the generated heat of combustion.
[0003]
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION It is an object of the present invention to provide a gaseous fuel-in-liquid combustion apparatus that can combust gaseous fuel in a liquid and efficiently raise the temperature of the liquid directly by the heat of combustion.
[0004]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention provides a mixer for mixing gaseous fuel and oxygen, a gas discharge device for discharging a mixed gas from the mixer as fine bubbles into a liquid in a combustion vessel, and a combustion vessel therefor. Provided is a device for in-liquid combustion of gaseous fuel having a sound wave generator for generating sound waves in a liquid in the liquid and causing implosion of the microbubbles in the liquid.
[0005]
The gas discharge device in the gas fuel in-liquid combustion device according to the present invention discharges a mixed gas obtained by mixing a gaseous fuel and an appropriate amount of oxygen gas into liquid as fine bubbles having a diameter of several hundred μm or less.
The microbubbles of the mixed gas of the gaseous fuel and the oxygen gas in the liquid have a diameter of several hundred μm or less, so that the shape of the bubbles is almost a sphere.
[0006]
On the other hand, the sound wave generator applies a strong sound wave of more than one hundred and several tens of decibels to a liquid containing microbubbles of a mixed gas of gaseous fuel and oxygen gas. When a strong sound wave is applied to the liquid containing fine bubbles as described above, the sound wave propagates in the liquid, and a sound pressure is uniformly applied to the surface of the fine bubbles.
[0007]
The bubble surface uniformly contracts due to the applied sound pressure, and a spherical shock wave is formed in the fine bubble due to the contraction of the bubble surface. The formed spherical shock wave contracts toward the center of the bubble, and an explosion (implosion) occurs at the center of the bubble.
[0008]
Due to the implosion of the spherical shock wave, the temperature of the mixed gas near the center of the microbubbles becomes tens of thousands of kelvin or more and rises extremely, and the mixed gas burns due to this temperature rise. Combustion heat is generated with the combustion of the mixed gas, and the combustion heat heats the liquid.
[0009]
The gaseous fuel used in the in-liquid combustion device according to the present invention includes hydrogen, carbon monoxide, methane, acetylene, ethylene, ethane, propylene, propane, 1-butylene, n-butane, benzene, and hydrocarbons. A typical liquid is water.
[0010]
The generation of a spherical shock wave in the microbubble described above, the implosion, and the temperature rise of the gas mixture in the bubble are schematically shown in FIGS. 2 to 4 and will be described below.
2 to 4, (a) shows the state of the bubble, and (b) shows the temperature change in the bubble.
[0011]
FIG. 2 shows a situation where sound pressure 2 is applied to microbubbles 1 of a mixed gas in a liquid, and
[0012]
It is well known that when a sound pressure of a certain value or more is applied to a bubble in water, a spherical shock wave is formed inside the bubble, and the implosion forms an ultra-high temperature region near the center. The present invention provides an apparatus for burning a gaseous fuel in a liquid using an ultrahigh temperature region generated by the implosion.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a gaseous fuel-in-liquid combustion device according to the present invention will be specifically described based on one embodiment shown in FIG. The in-liquid combustion device shown in FIG. 1 is one in which the present invention is applied to a device that raises the temperature of water by burning gaseous fuel in water.
[0014]
The apparatus shown in FIG. 1 includes a gaseous fuel tank 6, an oxygen tank 7, a gaseous fuel / oxygen mixer 8, a compressor 10 for supplying a gaseous fuel / oxygen gas mixture to a combustion vessel 9, and a gaseous fuel vessel. A microbubble generator 11 for making microbubbles when injecting into the air is provided.
The apparatus shown in FIG. 1 includes a sound wave generator 12 and a sound wave generator controller 13 connected to the combustion vessel 9 for applying sound pressure to the fine bubbles injected into the liquid (in this case, water) in the combustion vessel 9. A power supply 14 is provided.
[0015]
Further, a water supply pump 16 for supplying water 15 to the combustion vessel, a heated water supply pipe 17 for supplying water heated in the combustion vessel to required equipment, a valve 18 for gaseous fuel, an oxygen tank , A mixed gas supply valve 20, a water supply valve 21, and the like.
[0016]
In the apparatus of FIG. 1 having the above configuration, the gaseous fuel is mixed with oxygen in the mixer 8 and supplied to the combustion vessel 9 via the fine bubble generator 11 by the compressor 10. On the other hand, water is supplied to the combustion vessel 9 by the water supply pump 16.
[0017]
In the combustion vessel 9, there is a state in which fine bubbles of the mixed gas exist in the water. When sound pressure is applied by the sound wave generator 12 in this state, the spherical shock wave explodes in the fine bubbles as described above, the bubbles are burned, the heat of combustion is released, and the temperature of the water rises.
The water whose temperature has risen is supplied to various devices by a heating water supply pipe 17. The supply of the mixed gas and the water and the combustion of the fine bubbles are continuously performed.
[0018]
【The invention's effect】
As described above, according to the present invention, there is provided an apparatus capable of burning gaseous fuel in a liquid. In the device according to the present invention, internal combustion in the liquid is performed, so that the heating efficiency is remarkably improved as compared with a conventional heating device using gaseous fuel (external combustion).
Therefore, according to the present invention, a highly efficient liquid (water) heating device, a boiler, and the like can be developed.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing an apparatus for burning a gaseous fuel in a liquid according to an embodiment of the present invention.
FIG. 2 is an explanatory diagram showing a state in which a spherical shock wave is generated inside a microbubble by applying sound pressure to a microbubble of a mixed gas of a gaseous fuel and oxygen in a liquid.
FIG. 3 is an explanatory diagram showing a state in which a spherical shock wave contracts toward the center of a fine bubble.
FIG. 4 is an explanatory view showing a state in which an ultrahigh-temperature region is formed at the center of a fine bubble by implosion.
[Explanation of symbols]
6 Gas fuel tank 7 Oxygen tank 8 Mixer 9 Combustion vessel 10 Compressor 11 Microbubble generator 12 Sound generator 13 Sound generator controller 14 Power supply 15 Liquid (water)
16 Water supply pump 17 Heated water supply pipe 18 Valve for gaseous fuel 19 Valve for oxygen tank 20 Valve for supply of mixed gas 21 Valve for water supply
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24327296A JP3595418B2 (en) | 1996-09-13 | 1996-09-13 | Gas fuel in liquid combustion system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24327296A JP3595418B2 (en) | 1996-09-13 | 1996-09-13 | Gas fuel in liquid combustion system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1089625A JPH1089625A (en) | 1998-04-10 |
| JP3595418B2 true JP3595418B2 (en) | 2004-12-02 |
Family
ID=17101407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24327296A Expired - Lifetime JP3595418B2 (en) | 1996-09-13 | 1996-09-13 | Gas fuel in liquid combustion system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3595418B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100458283C (en) * | 2007-02-07 | 2009-02-04 | 南京理工大学 | Piezoelectric bow-wave flame injection device |
-
1996
- 1996-09-13 JP JP24327296A patent/JP3595418B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH1089625A (en) | 1998-04-10 |
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