US3406906A - Fuel atomizing burner for liquid fuels - Google Patents

Fuel atomizing burner for liquid fuels Download PDF

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Publication number
US3406906A
US3406906A US572535A US57253566A US3406906A US 3406906 A US3406906 A US 3406906A US 572535 A US572535 A US 572535A US 57253566 A US57253566 A US 57253566A US 3406906 A US3406906 A US 3406906A
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US
United States
Prior art keywords
fuel
tube
air
conduit
orifice
Prior art date
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Expired - Lifetime
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US572535A
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English (en)
Inventor
Backman Sture Anders
Winquist Knut Ludvig
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KNUT LUDVIG WINQUIST
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Individual
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Publication date
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Publication of US3406906A publication Critical patent/US3406906A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/24—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space by pressurisation of the fuel before a nozzle through which it is sprayed by a substantial pressure reduction into a space
    • F23D11/26—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space by pressurisation of the fuel before a nozzle through which it is sprayed by a substantial pressure reduction into a space with provision for varying the rate at which the fuel is sprayed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/24—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space by pressurisation of the fuel before a nozzle through which it is sprayed by a substantial pressure reduction into a space
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S261/00—Gas and liquid contact apparatus
    • Y10S261/39—Liquid feeding nozzles

Definitions

  • An atomizing burner for liquid fuels including a means for varying the amount of combustion air without substantially changing the air speed past the fuel inlet orifice.
  • An air conduit is arranged to slide axially around the fuel tube whereby an air passageway between the conduit and the tube is varied in width.
  • Another disadvantage is that it has not been possible to regulate the size of the flame according to the required effect but that it has been necessary to operate the burner intermittently at full power in an uneconomical manner. This is due to the fact that if the flow of fuel is reduced the atomizing force is also reduced resulting in poor atomization of the fuel. Connected with this problem is the problem of the supply of combustion air. When adjusting for smaller air-flows, for instance when operating at low power, it has been usual to reduce the flow by means of a throttle situated in the air conduit, whereby the velocity of the air flow is reduced at the nozzle opening, resulting in an impaired mixing effect. If, on the other hand, the flow of air is not reduced the efficiency of the plant is greatly lowered due to the excess of air.
  • the object of the present invention is to solve the aforementioned problems.
  • the arrange ment according to the invention has been given the characteristics disclosed in the claims.
  • a supporting plate 1 supports a nozzle tube 2 to which fuel is supplied from a fuel line 3 through a channel 4.
  • the opening of the nozzle 5 is closed by a valve body 6 abutting a valve seating 7, under the influence of a tension spring 8 secured between the valve body and a regulating or control rod 9.
  • the regulating rod is displaceably arranged in the plate 1 and runs in a seal 10.
  • the fuel is delivered, for instance, from a diaphragm pump P at a pulsating pressure having a frequency of between 50 and 100 Hz. (cycles per second) and a maximum pressure of between 1 and 1.5 mn./m. (meganewtons per square meter), owing to the pulsations of the fuel the valve body 3,406,906 Patented Oct. 22, 1968 will execute small oscillations in the flow direction, towards and away from the valve seating.
  • Combustion air is introduced through an air conduit 11 connected, via a compensator in the form of a bellows 12, to an air pipe 13 surrounding the nozzle tube, the air pipe 13 forming an atomizing chamber 14 for the air around said nozzle tube.
  • the air tube 13 tapers at the nozzle 5 to a diameter which is less than the diameter of the nozzle tube, whereby the air tube with the nozzle forms an annular gap 15 for the combustion air.
  • the air pipe then extends out into a burner tube 16.
  • the air pipe is displaceably mounted on the nozzle tube 2 by means of an axially directed portion 17.
  • the width of the gap 15 can be varied and owing to the fact that the air pipe is connected with the regulating rod 9 by means of a rigid connecting link 18 the width of the gap can be changed according to the position of the regulating rod and thus the tension of the spring is also changed.
  • the arrangement functions in the following manner.
  • Combustion oil is fed to the nozzle tube 2 via the conduit 3 and channel 4.
  • the valve body is forced outwards so that an annular gap corresponding to the tension of the spring is formed between the valve body 6 and the valve seating 7, whereby a continuous flow of fuel corresponding to the width of the annular gap is released forward along the surface of the valve body.
  • This flow comprises small particles of liquid fuel which appear as a result of the fuel being atomized by a maximum possible atomizing force, which is maintained by the valve body performing small oscillations in the direction of flow, towards and away from the valve seating.
  • the air flow can be reduced to the required extent without reducing the velocity of the air, and thereby impairing the mixing effect, which would be the case if the air were to be regulated with a throttle in the conduit 11 or in similar manner.
  • the arrangement according to the invention thus allows the burner to be operate-d continuously with maximum atomization and with a constant regulating of the flow of fuel, and thereby the flame, within wide limits, the flow of air being regulated at the same time to a corresponding degree whilst the discharge velocity of both the fuel and air is constant the whole time at just that point where intermixing takes place, whereby an optimal mixing effect is obtained throughout the range of regulation.
  • the result is better fuel economy and cleaner waste gases.
  • the vibrations of the valve body can be caused in another way than by pulsations in the fuel pressure.
  • a discharge apparatus comprising a nozzle, a valve member disposed at the discharge end of said nozzle, a spring connected at one end to said valve member and adapted to urge same towards said discharge end, and means to supply fuel at a pulsating pressure to said nozzle, which pressure exceeds the force of said spring to permit oscillatory movement of said valve member and corresponding discharge of said fuel in an atomized state, further comprising a regulatory rod connected to the other end of said spring, said rod being movable with respect to said nozzle to regulate the flow of fuel from said nozzle, and an air pipe surrounding said nozzle and means to supply air to said pipe for mixture with fuel flowing from said nozzle, wherein said air pipe and the discharge end of said nozzle are tapered and together define a gap through which air flows, wherein said air pipe is movable with respect to said nozzle and further comprising means connecting said air pipe with said rod so that said air flow gap is varied in response to movement of said rod.
  • a fuel atomizing burner for liquid fuel comprising: a fuel tube having a fuel outlet orifice extending therethrough, an inlet for liquid fuel leading into said tube, a valve member externally of said orifice and arranged to reciprocate along the axis of said orifice for opening and closing same, a spring means urging said valve member to a closed position relative to said orifice, said valve member being displaceable to an open position against the urging of said spring means and under the urging of liquid pressure in said tube, an air conduit for supplying air to the outlet side of said orifice, said conduit including a wall portion which surrounds a portion of said fuel tube adjacent to said orifice in spaced relationship therewith so as to define a passageway between said tube and wall portion, an air inlet leading into said conduit, first means to adjust the position of said tube relative to said conduit whereby the width of said passageway may be varied and second means to vary the extent to which said valve member opens relative to a particular amplitude of fuel pressure within said tube and wherein said first and second
  • said conduit comprises an annular chamber defined by outer and inner radial walls coaxial with said tube, said inner wall contactingly surrounding the outer surface of said fuel tube, an air inlet leading into said chamber, said outer wall being extended by a wall portion which is inclined towards the axis of said tube, said orifice extending through an end wall of said tube coaxially therewith, said tube having an end wall portion extending from adjacent said orifice in a direction substantially parallel to the inclined wall portion of said conduit, one end of said chamber opening toward the inclined wall portion of said conduit, and said conduit inner wall being axially slidable along the outer surface of said tube.
  • the burner of claim 3 including a means for supplying liquid fuel under a pulsating pressure into said fuel tube, said valve member including a stern portion extending through said orifice and into said tube, a coil spring connected at one end to said stem and at its other end to a control member, said spring and control member extending coaxially with said tube, said control member being axially displaceable to vary the tension in said spring.
  • a fuel atomizing burner for liquid fuel comprising: a fuel tube having a fuel outlet orifice extending therethrough, an inlet for liquid fuel leading into said tube, a valve member externally of said orifice and arranged to reciprocate along the axis of said orifice for opening and closing same, a spring means urging said valve member to a closed position relative to said orifice, said valve member being displaceable to an open position against the urging of said spring means and under the urging of liquid pressure in said tube, an air conduit for supplying air to the outlet side of said orifice, said conduit including a wall portion which surrounds a portion of said fuel tube adjacent to said orifice in spaced relationship therewith so as to define a passageway between said tube and wall portion, an air inlet leading into said conduit, first means to adjust the position of said tube relative to said conduit whereby the width of said passageway may be varied and second means to vary the extent to which said valve member opens relative to a particular amplitude of fuel pressure within said tube, and wherein said fuel tube
  • An atomizing fuel burner for liquid fuels including a fuel tube having a liquid fuel orifice for admitting atomized liquid fuel into a combustion chamber and an air conduit for supplying a stream of air travelling at a velocity into said chamber and past said orifice, and including a regulating means for varying the flow quantity of said air while maintaining a substantially constant air stream velocity past said orifice, said orifice being formed in a wall of said fuel tube, said air conduit including a wall which is spaced from the first mentioned wall and thereby forms a gap therebetween through which the air must flow to pass from said conduit into said conduit, said conduit and fuel tube being adjustably mounted relative to each other whereby the width of said gap may be varied, and, including a second regulating means to vary the amount of fuel flow through said orifice in response to a variation in said air gap width.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pressure-Spray And Ultrasonic-Wave- Spray Burners (AREA)
  • Nozzles For Spraying Of Liquid Fuel (AREA)
  • Feeding And Controlling Fuel (AREA)
US572535A 1965-08-26 1966-08-15 Fuel atomizing burner for liquid fuels Expired - Lifetime US3406906A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE11170/65A SE316558B (enrdf_load_html_response) 1965-08-26 1965-08-26

Publications (1)

Publication Number Publication Date
US3406906A true US3406906A (en) 1968-10-22

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ID=20293475

Family Applications (1)

Application Number Title Priority Date Filing Date
US572535A Expired - Lifetime US3406906A (en) 1965-08-26 1966-08-15 Fuel atomizing burner for liquid fuels

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US (1) US3406906A (enrdf_load_html_response)
DK (1) DK112965B (enrdf_load_html_response)
ES (1) ES330603A1 (enrdf_load_html_response)
FI (1) FI48011C (enrdf_load_html_response)
GB (1) GB1103005A (enrdf_load_html_response)
SE (1) SE316558B (enrdf_load_html_response)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3510112A (en) * 1964-07-09 1970-05-05 Knut L Winquist Liquid atomizer
US3591081A (en) * 1968-03-29 1971-07-06 Campagnie Des Gaz De Petrole P Process and installation for burning liquified hydrocarbons
US5560710A (en) * 1988-12-23 1996-10-01 Thyssengas Gmbh Process for mixing gas jets or streams

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114234181B (zh) * 2021-12-23 2024-03-08 军事科学院系统工程研究院军需工程技术研究所 一种用于压力雾化燃烧器的燃油雾化装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1441915A (en) * 1920-01-29 1923-01-09 Ellis Thomas Crude-oil burner
US2577853A (en) * 1944-05-02 1951-12-11 Kask Technical Corp Atomizing nozzle
US3039699A (en) * 1957-12-19 1962-06-19 Georgia Tech Res Inst Spray nozzle with vibratory head and seat
FR1366565A (fr) * 1963-08-22 1964-07-10 Procédé et dispositif de chauffage de fours céramiques à chambre haute
US3217780A (en) * 1961-05-03 1965-11-16 Fetok Gmbh Process and apparatus for injecting liquid fuel

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1441915A (en) * 1920-01-29 1923-01-09 Ellis Thomas Crude-oil burner
US2577853A (en) * 1944-05-02 1951-12-11 Kask Technical Corp Atomizing nozzle
US3039699A (en) * 1957-12-19 1962-06-19 Georgia Tech Res Inst Spray nozzle with vibratory head and seat
US3217780A (en) * 1961-05-03 1965-11-16 Fetok Gmbh Process and apparatus for injecting liquid fuel
FR1366565A (fr) * 1963-08-22 1964-07-10 Procédé et dispositif de chauffage de fours céramiques à chambre haute

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3510112A (en) * 1964-07-09 1970-05-05 Knut L Winquist Liquid atomizer
US3591081A (en) * 1968-03-29 1971-07-06 Campagnie Des Gaz De Petrole P Process and installation for burning liquified hydrocarbons
US5560710A (en) * 1988-12-23 1996-10-01 Thyssengas Gmbh Process for mixing gas jets or streams

Also Published As

Publication number Publication date
FI48011B (enrdf_load_html_response) 1974-01-31
FI48011C (fi) 1974-05-10
DE1501797B2 (de) 1972-09-21
GB1103005A (en) 1968-02-14
DK112965B (da) 1969-02-03
DE1501797A1 (de) 1969-11-27
ES330603A1 (es) 1967-06-16
SE316558B (enrdf_load_html_response) 1969-10-27

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