WO2023090027A1 - Dispositif d'amélioration d'efficacité de combustion - Google Patents

Dispositif d'amélioration d'efficacité de combustion Download PDF

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Publication number
WO2023090027A1
WO2023090027A1 PCT/JP2022/038696 JP2022038696W WO2023090027A1 WO 2023090027 A1 WO2023090027 A1 WO 2023090027A1 JP 2022038696 W JP2022038696 W JP 2022038696W WO 2023090027 A1 WO2023090027 A1 WO 2023090027A1
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WO
WIPO (PCT)
Prior art keywords
fuel
flow path
combustion efficiency
combustion
nozzle
Prior art date
Application number
PCT/JP2022/038696
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English (en)
Japanese (ja)
Inventor
満 末松
則昭 中桐
Original Assignee
株式会社アプライド・エナジー・ラボラトリー
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Publication of WO2023090027A1 publication Critical patent/WO2023090027A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/50—Circulation mixers, e.g. wherein at least part of the mixture is discharged from and reintroduced into a receptacle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/71—Feed mechanisms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M27/00—Apparatus for treating combustion-air, fuel, or fuel-air mixture, by catalysts, electric means, magnetism, rays, sound waves, or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M27/00—Apparatus for treating combustion-air, fuel, or fuel-air mixture, by catalysts, electric means, magnetism, rays, sound waves, or the like
    • F02M27/08—Apparatus for treating combustion-air, fuel, or fuel-air mixture, by catalysts, electric means, magnetism, rays, sound waves, or the like by sonic or ultrasonic waves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K5/00—Feeding or distributing other fuel to combustion apparatus
    • F23K5/02—Liquid fuel
    • F23K5/14—Details thereof
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the present invention relates to a combustion efficiency improving device for improving combustion efficiency when burning liquid fuel in a combustion device.
  • Engines, boilers, burners, etc. are widely used as combustion devices that generate power and heat by burning liquid fuels such as light oil, heavy oil, and kerosene.
  • Patent Document 1 Japanese Unexamined Patent Application Publication No. 2007-24012).
  • the present invention has been made in view of the above circumstances, and when burning liquid fuel in a combustion device, it is possible to prevent damage to the combustion device and poor combustion.
  • An object of the present invention is to provide a combustion efficiency improving device capable of improving combustion efficiency without stopping the operation of the device.
  • a combustion efficiency improvement device is a combustion efficiency improvement device for improving combustion efficiency when liquid fuel is burned in an external combustion device, wherein the fuel is supplied from an external fuel supply source to the combustion device.
  • a branched flow path that branches upstream from the main flow path that feeds the fuel and that is incorporated to merge on the downstream side; a nozzle that is incorporated in the branched flow path to generate bubbles; a pressurizing pump that applies pressure and sends the fuel toward the nozzle, the nozzle having no gas suction port from the outside and cavitation when the fuel of the predetermined pressure flows.
  • the predetermined pressure of the pressurizing pump is set so as not to change the pressure on the upstream side and the pressure on the downstream side from the confluence position, and the branch position is relative to the position of the fuel pump provided in the fuel supply source. provided at a downstream position in the main flow path.
  • the disclosed combustion efficiency improvement device it is possible to improve combustion efficiency in a combustion device that generates power and heat by burning liquid fuel such as light oil, heavy oil, and kerosene.
  • liquid fuel such as light oil, heavy oil, and kerosene.
  • FIG. 1 is a configuration diagram showing an example of an entire combustion system in which a combustion efficiency improving device according to this embodiment is incorporated.
  • FIG. 2 is a schematic diagram showing an example of a combustion efficiency improving device according to this embodiment.
  • FIG. 3 is a schematic diagram showing an example of a nozzle of the combustion efficiency improving device according to this embodiment.
  • FIG. 1 is a configuration diagram showing an example of an entire combustion system in which a combustion efficiency improving device 1 according to this embodiment is installed.
  • FIG. 2 is a schematic diagram showing an example of the combustion efficiency improving device 1 according to this embodiment.
  • members having the same functions are denoted by the same reference numerals, and repeated description thereof may be omitted.
  • the combustion efficiency improving device 1 is a device that improves the combustion efficiency when liquid fuel is burned in an external combustion device.
  • liquid fuel examples include light oil, heavy oil (preferably heavy oil A), and kerosene.
  • combustion device examples include an engine, a boiler, a burner, and the like.
  • the combustion efficiency improving device 1 is first positioned upstream (second 1 position) 11 and joins at a downstream position (second position) 12 to form an annular flow path. Further, as a configuration incorporated in the branch flow path 20, a nozzle 30 for generating a bubble B and a pressure pump 22 for applying a predetermined pressure to the fuel F and feeding it toward the nozzle 30 are provided.
  • the external fuel supply source 100 includes, for example, a tank 101 that stores the liquid fuel F and a fuel pump (feed pump) 102 that feeds the fuel F from the tank 101 to the main flow path 10. .
  • a fuel pump feed pump
  • the present invention is not limited to this configuration, and a configuration in which the fuel F is fed by an injection pump (supply pump) provided in the combustion device 200 without the fuel pump (feed pump) may be employed (not shown). ).
  • the nozzle 30 does not have a gas suction port from the outside, and fuel F at a predetermined pressure flows through it.
  • a cavitation generator 31 is provided for generating bubbles B, which will be described later, in the fuel F by actually causing a cavitation phenomenon.
  • the nozzle 30 does not have a gas suction port seen in the technique of sucking gas from the outside to the inside to generate bubbles as exemplified in Patent Document 1, and the fuel F flowing through the inside does not have a gas suction port.
  • the dissolved gas in this case, air
  • the liquid (constituent components) of fuel F itself evaporates to form bubble B. It is configured to generate
  • the nozzle 30 also includes a stirring portion 32 that generates a stirring flow in the fuel F when the fuel F at a predetermined pressure flows.
  • the cavitation generating section 31 described above also serves as the stirring section 32 .
  • it is not limited to this configuration, and may be provided separately (not shown).
  • the branch channel 20 constitutes a loop-shaped channel with respect to the main channel 10 . Furthermore, the pressure of the pressure pump 22 is adjusted so as not to change the pressure upstream from the branch position (first position) 11 in the main flow path 10 and the pressure downstream from the junction position (second position) 12 in the main flow path 10. A predetermined pressure is set.
  • the branch flow path 20 provides the main flow path 10 Since there is no (substantially no) pressure fluctuation, there is no effect on the delivery action and control of the fuel pump 102 and the fuel injection device 201 .
  • the "predetermined pressure” applied to the fuel F when the pressurizing pump 22 described above feeds the fuel F toward the nozzle 30 is in the range of about 2 atmospheres to 10 atmospheres, and the combustion The pressure is set to be lower than the set injection pressure of the fuel injection device 201 provided in the device 200 .
  • the set injection pressure if the fuel injection device 201 is an injection pump for a diesel engine, the set injection pressure is about 200 atmospheres, or if it is a common rail for a diesel engine, the set injection pressure is 2000 atmospheres. It is about atmospheric pressure.
  • a power source for driving the pressurizing pump 22 for example, if the combustion device 200 is a diesel engine, an in-vehicle DC 24V battery or the like can be used, or if it is a boiler or the like, an external power source can be used. A 200 V three-phase AC power supply or the like can be used.
  • the nozzle 30 is configured to generate ultra-fine bubbles having a particle size of less than 1 ⁇ m as the bubbles B when the fuel F pressure-fed by the pressure pump 22 passes through the nozzle 30 .
  • "less than 1 ⁇ m in diameter” does not mean that bubbles with a diameter of 1 ⁇ m or more are completely excluded.
  • the fuel F (droplets) can be made finer (described later), and the finer droplets increase the specific surface area and shorten the combustion time. More specifically, assuming that the droplet of the fuel F is a sphere whose diameter is reduced by 20%, the total surface area of the same volume of fuel F is increased by 25%. At this time, the volume of one droplet is approximately 1/2. As a result, the fuel F is efficiently combined with oxygen, and the effect of approaching complete combustion is obtained.
  • the flame is less likely to spread, and the generated thermal energy is concentrated, so that the effect of improving the combustion efficiency can be obtained.
  • the flame is less likely to spread, and the generated thermal energy is concentrated, so that the effect of improving the combustion efficiency can be obtained.
  • less heat is transferred to the cylinder, and more energy obtained by combustion can be used as power.
  • the combustion efficiency improvement effect of the present invention is even higher in a configuration including a conventional fuel injection device (injection pump) than in a configuration including a common rail fuel injection device.
  • the mechanism for improving combustion efficiency is slightly different from the above. Specifically, the combustion of the fuel F passed through the nozzle 30 approaches complete combustion and no soot is generated. This eliminates the large amount of soot adhering to the heat exchanger, which occurs in conventional combustion devices, and improves the heat exchange efficiency (that is, maintains the initial state of the device), improving combustion efficiency. effect can be obtained. Therefore, the combustion efficiency improvement effect of the present invention is even higher in the configuration with the spray burner than in the configuration with the gun type burner.
  • the inventors of the present application found that the ultra-fine bubbles generated in the fuel F floated, polymerized and disappeared in a short period of time (about 30 seconds to 1 minute), and that the viscosity of the fuel F It was found that the decrease lasts only for a short period of time (about 30 seconds to 1 minute) and returns to the original state when left standing. Since these are problems in realizing the combustion efficiency improvement device, a configuration that enables the solution was devised.
  • the nozzle 30 according to the present embodiment is located at a position where the flow time for the fuel F to reach the fuel injection device 201 of the combustion device 200 from the outflow port 34 of the nozzle 30 is a flow distance that does not exceed one minute. It was possible to solve the above problems by the configuration arranged in.
  • the fuel injection device 201 would be required to feed the fuel F over a long distance.
  • the viscosity of the fuel F will return to the original viscosity by the time it reaches , and is consumed in combustion.
  • the fuel injection device can Since it reaches 201 and is consumed for combustion, the aforementioned effect of improving combustion efficiency can be obtained.
  • the combustion device 200 is a diesel engine and a pipe having an inner diameter cross-sectional area of 1.7 square centimeters that is generally used as a fuel pipe serving as the main flow path 10 is used, up to the fuel injection device 201
  • the combustion efficiency improving device As described above, according to the combustion efficiency improving device according to the present invention, it is possible to improve the fuel combustion efficiency in a configuration in which liquid fuel is burned in a combustion device.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Dispersion Chemistry (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Accessories For Mixers (AREA)

Abstract

L'invention concerne un dispositif d'amélioration de l'efficacité de combustion, permettant d'améliorer l'efficacité de combustion d'un dispositif de combustion destiné à brûler du combustible liquide. Le dispositif (1) d'amélioration de l'efficacité de combustion, selon la présente invention, est destiné à améliorer l'efficacité de combustion lorsque du combustible liquide (F) est brûlé dans un dispositif de combustion externe (200), et le dispositif (1) comprend : des canaux de branchement (20) incorporés de sorte que leurs côtés amont soient séparés d'un canal principal (10) permettant de distribuer le combustible (F) à partir d'une source externe (100) d'alimentation en combustible vers le dispositif de combustion (200), et que leurs côtés aval soient fusionnés avec ledit canal principal (10) ; des buses (30) destinées à produire des bulles (B) et étant incorporées dans les canaux de branchement (20) ; et une pompe à pression (22) permettant d'appliquer une pression prescrite sur le combustible (F) à distribuer vers les buses (30). Chaque buse (30) comprend une unité de production de cavitation (31) ne comportant pas d'orifice d'admission de gaz à partir de l'extérieur mais étant conçue pour provoquer un phénomène de cavitation pendant la distribution du combustible (F) sous la pression prescrite, afin de produire ainsi des bulles (B) dans le combustible (F).
PCT/JP2022/038696 2021-11-16 2022-10-18 Dispositif d'amélioration d'efficacité de combustion WO2023090027A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2021186059A JP7042540B1 (ja) 2021-11-16 2021-11-16 燃焼効率改善装置
JP2021-186059 2021-11-16

Publications (1)

Publication Number Publication Date
WO2023090027A1 true WO2023090027A1 (fr) 2023-05-25

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7143540B1 (ja) 2022-02-03 2022-09-28 日本タングステン株式会社 ファインバブル生成器

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005028305A (ja) * 2003-07-07 2005-02-03 Institute Of Computational Fluid Dynamics 気液混合物生成装置、汚水浄化装置及び燃料噴射装置
US20110265737A1 (en) * 2008-08-04 2011-11-03 Robert Ryon Methods and devices for fuel reformation
WO2012011851A2 (fr) * 2010-07-08 2012-01-26 Potapkov Dmitry Vadimovich Dispositif de cavitation pour carburant
JP2014147901A (ja) * 2013-02-01 2014-08-21 Micro-Bub Kk マイクロバブル生成器及びマイクロバブル生成管路構造

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005028305A (ja) * 2003-07-07 2005-02-03 Institute Of Computational Fluid Dynamics 気液混合物生成装置、汚水浄化装置及び燃料噴射装置
US20110265737A1 (en) * 2008-08-04 2011-11-03 Robert Ryon Methods and devices for fuel reformation
WO2012011851A2 (fr) * 2010-07-08 2012-01-26 Potapkov Dmitry Vadimovich Dispositif de cavitation pour carburant
JP2014147901A (ja) * 2013-02-01 2014-08-21 Micro-Bub Kk マイクロバブル生成器及びマイクロバブル生成管路構造

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
NAKATAKE YASUHITO, WATANABE TAKASHI, EGUCHI TOSHIHIKO: "Combustion Improvement for Diesel Engines with Ejector-Type Micro-Bubble Mixed Fuel", TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS SERIES B, vol. 73, no. 735, 1 January 2007 (2007-01-01), pages 196 - 202, XP093068817 *
NAKATAKE YASUHITO: "Environmental Load Reduction of Diesel Engine with Nano Bubble Mixed Diesel Oil", MARINE ENGINEERING, vol. 46, no. 6, 1 January 2011 (2011-01-01), pages 75 - 80, XP093068812 *
TSUGE HIDEKI: "Fundamentals of Microbubbles and Nanobubbles", BULLETIN OF THE SOCIETY OF SEA WATER SCIENCE, JAPAN, vol. 64, no. 1, 1 January 2010 (2010-01-01), pages 4 - 10, XP093068837 *

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JP2023073538A (ja) 2023-05-26

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