US3429645A - Flare stack burner - Google Patents

Flare stack burner Download PDF

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Publication number
US3429645A
US3429645A US669130A US3429645DA US3429645A US 3429645 A US3429645 A US 3429645A US 669130 A US669130 A US 669130A US 3429645D A US3429645D A US 3429645DA US 3429645 A US3429645 A US 3429645A
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United States
Prior art keywords
aspirating
flare stack
conduits
gas
tubular member
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.)
Expired - Lifetime
Application number
US669130A
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English (en)
Inventor
Robert D Reed
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zinklahoma Inc
Original Assignee
John Zink Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by John Zink Co filed Critical John Zink Co
Application granted granted Critical
Publication of US3429645A publication Critical patent/US3429645A/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
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
    • F23G7/08—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases using flares, e.g. in stacks
    • F23G7/085—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases using flares, e.g. in stacks in stacks

Definitions

  • Aspirating devices draw air thereinto which is mixed with an aspirating medium and the mixture is discharged upwardly within the body of the flared gas moving upwardly in the stack. Low pressure is developed which draws the flared gas into the mixture to promote complete combustion. The flame is projected vertically upwardly and it is not deflected by transverse wind currents.
  • the present invention relates to a burner assembly for the combustion of gases at significant elevations above the surrounding terrain and the invention more specifically pertains to equipment in association with a flare stack for directing air mixed with a combustion promoting medium into the flared gas adjacent the upper end of the stack to provide smokeless burning and to develop a substantially rigid vertical flame.
  • a flare stack burner wherein aspirating units mix air with an aspirating medium such as a gas or steam and the mixture is discharged upwardly within the stack at the high velocity which draws the flared gas into the mixture to develop turbulence promoting intermingling of the mixture with the flared gas and providing substantially complete combustion of the flared gas and the development of a vertical flame which is not susceptible to lateral deflection by average wind currents.
  • an aspirating medium such as a gas or steam
  • FIG. 1 is an axial sectional view of the upper end portion of a flare stack burner embodying the invention showing the aspirating units in association with the stack.
  • FIG. 2 is a plan view of the stack showing some of the aspirating devices.
  • FIG. 3 is an enlarged sectional view of a portion of the tip structure.
  • a flare stack is shown at 10 which is adapted to *be erected in a substantially vertical position.
  • the upper end portion is formed by a tubular member 11 which may be mounted on the stack sections therebelow in any suitable manner such as by means of a flange and bolt assembly as indicated at 12.
  • the structure of the tip will be appreciated from consideration of FIG. 3 and it comprises an annular member having a relatively large central opening 14 defined by the inner edge of a web 16 having an undulating shape when viewed in section.
  • the annular member includes a depending flange 17 having an inner diameter substantially flush with the inner surface of the tubular member 11.
  • the depending flange 17 merges with the web 16 to provide an annular lip 21 which is convex shaped and constitutes the most elevated extremity of the burner tip.
  • a row of discharge ports 22 is provided in the web 16 and the exit ends of the discharge ports terminate immediately below the annular lip 21.
  • a second row 3,429,645 Patented Feb. 25, 1969 of discharge ports 23 and a third row of discharge ports 24 extend through the web 16.
  • the exit ends of the discharge ports 23 and 24 terminate at the upper surface of the undulating web 16 and within an annular concave recess which is positioned below the annular lip 21.
  • the axes of the ports 23 and 24 converge towards each other in proceeding upwardly and the axes of the ports 22 converge toward the axis of tubular member to provide intermingling of the flared gas escaping through these ports.
  • the exit end of the opening 14 is below the level of the lip 21.
  • a flare stack embodying the invention includes a plurality of aspirating units 31 mounted on the tubular member 11 and cooperate with the tip structure to promote combustion of the flared gas.
  • These aspirating units are of a well known construction and an aspirating medium under pressure is supplied into each aspirating unit 31 from an associated pipe 32.
  • the aspirating medium as it is discharged into the throat of the aspirating unit draws air thereinto the provide a mixture of air and the aspirating medium.
  • Each aspirating unit is supported by a conduit 33 which may extend through the wall of the tubular member 11.
  • the respective conduits 33 extend upwardly within the tubular member 11 and each conduit has an open upper end adjacent the tip structure.
  • there is a centrally positioned conduit 33 which extends upwardly along the axis of the tubular member.
  • the centrally positioned conduit 33 may be of larger diameter than the other conduits and its aspirator may be of larger diameter.
  • the open upper end of the central conduit 33 is desirably of cylindrical shape as shown in FIG. 2.
  • the upper end of each other conduit may be flattened as shown at 38 so that the open upper ends of these conduits are elongated as shown in FIG. 2.
  • the major dimension of the elongated openings is in directions radially of the central opening 14. All of the conduits terminate substantially at at the level of the exit end of the central opening 14 and below the level of the annular lip 21.
  • the aspirating medium for the aspirator units may be methane, hydrogen or gases including air but in carrying out the invention, steam has an advantage for the aspirating medium because of the chemical potential it provides and because of its thermal energy.
  • Steam supplied through the pipes 32 at pressures of about twenty-five pounds per square inch draws approximately fifteen cubic feet of air into each aspirating unit for each cubic foot of steam.
  • the steam and air are homogeneously mixed within each aspirating unit and the mixture moves upwardly within the conduits 33.
  • the mixture is discharged through the open ends of the conduits at velocities of at least two hundred feet per second.
  • the mixture is discharged within the body of the flared gas moving upwardly within the tubular member 11. The velocity of the mixture is much greater than the velocity of the flared gas.
  • a low pressure condition is developed within the higher velocity mixture and the flared gas is drawn into the low pressure zones.
  • the flared gas is thoroughly mixed with steam from each conduit 33.
  • a high state of turbulence is also developed at the upper end of the flare stack.
  • the high velocity of the mixture escaping from the conduits 33 produces a flame in the burning of the flared gas.
  • the flame is vertical and substantially rigid. Its upward-velocity is so great that average transverse wind currents do not deflect the flame.
  • a flare stack exhibiting the structural characteristics hereinabove described provides improvements in the art of smokeless burning.
  • steam is employed as the aspirating medium complete combustion of the flare gas is attained with less than one-half of the steam required with prior flare stack burners.
  • Patent is:
  • a vertically disposed tubular member for guiding gas upwardly therein, a tip structure at the upper end of said tubular member having a central opening for the upward escape of gas, a plurality of conduits each having a vertically disposed portion within the tubular member and an open upper end adjacent said tip structure, an aspirating unit outside said tubular member connected to each conduit, means directing an aspirating medium into each aspirating unit whereby air is drawn into the associated unit to provide a mixture of air and the aspirating medium within said conduits, and said conduits directing the mixtures upwardly through said open upper ends at velocities greater than the upwardly moving gas whereby low pressure Within the streams of said mixtures draws the gas thereinto.
  • one of the conduits is centrally positioned and extends along the axis of the tubular member and the other conduits are circumferentially spaced around the central conduit.
  • one of the conduits has a cylindrically shaped open upper end arranged coaxially of the tubluar member with the other conduits circumferentially spaced therearound, and the open upper ends of said outer conduits viewed in plan being elongated in directions radially of the axis of the tubular member.

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  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
  • Incineration Of Waste (AREA)
  • Pre-Mixing And Non-Premixing Gas Burner (AREA)
US669130A 1967-09-20 1967-09-20 Flare stack burner Expired - Lifetime US3429645A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US66913067A 1967-09-20 1967-09-20

Publications (1)

Publication Number Publication Date
US3429645A true US3429645A (en) 1969-02-25

Family

ID=24685156

Family Applications (1)

Application Number Title Priority Date Filing Date
US669130A Expired - Lifetime US3429645A (en) 1967-09-20 1967-09-20 Flare stack burner

Country Status (4)

Country Link
US (1) US3429645A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE6610846U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR1581891A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1213848A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3512911A (en) * 1968-09-30 1970-05-19 Zink Co John Flare stack burner
US3539285A (en) * 1969-03-20 1970-11-10 Zink Co John Flare stack burner assembly
US3547567A (en) * 1968-07-25 1970-12-15 Smoke Ban Mfg Inc Flare stack combustion tip
US4084935A (en) * 1976-03-15 1978-04-18 John Zink Company Smoke suppressant mixer for flared gases
US4243376A (en) * 1977-05-09 1981-01-06 The British Petroleum Company Limited Flare
US4373902A (en) * 1981-01-26 1983-02-15 John Zink Company Immediate ignition smokeless burning of waste gases
US4597733A (en) * 1985-02-14 1986-07-01 Alvin Dean Gas heating system for dehydrators and the like
EP0476548A3 (en) * 1990-09-19 1992-09-02 John Zink Gmbh Flare burner
RU2176050C2 (ru) * 1996-12-16 2001-11-20 Дудышев Валерий Дмитриевич Способ сжигания нефтяных газов и устройство для его осуществления
WO2020231775A1 (en) * 2019-05-10 2020-11-19 Vaprox LLC Clean burning gas flare tip

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2136557B (en) * 1983-03-19 1986-05-21 Gkn Birwelco Ltd Flare for high velocity gas
GB8307687D0 (en) * 1983-03-19 1983-04-27 Gkn Birwelco Ltd Flares
US6908297B2 (en) * 2000-05-26 2005-06-21 Rohm And Haas Company Hydrogen-fueled flare system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2204719A (en) * 1938-10-14 1940-06-18 John S Zink Combination gas and oil burner
US2480230A (en) * 1944-10-06 1949-08-30 Nat Tube Co Gas igniter for blast furnace bleeder stacks and the like
US2506972A (en) * 1947-03-08 1950-05-09 Standard Oil Co Flare stack tip

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2204719A (en) * 1938-10-14 1940-06-18 John S Zink Combination gas and oil burner
US2480230A (en) * 1944-10-06 1949-08-30 Nat Tube Co Gas igniter for blast furnace bleeder stacks and the like
US2506972A (en) * 1947-03-08 1950-05-09 Standard Oil Co Flare stack tip

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3547567A (en) * 1968-07-25 1970-12-15 Smoke Ban Mfg Inc Flare stack combustion tip
US3512911A (en) * 1968-09-30 1970-05-19 Zink Co John Flare stack burner
US3539285A (en) * 1969-03-20 1970-11-10 Zink Co John Flare stack burner assembly
US4084935A (en) * 1976-03-15 1978-04-18 John Zink Company Smoke suppressant mixer for flared gases
US4243376A (en) * 1977-05-09 1981-01-06 The British Petroleum Company Limited Flare
US4373902A (en) * 1981-01-26 1983-02-15 John Zink Company Immediate ignition smokeless burning of waste gases
US4597733A (en) * 1985-02-14 1986-07-01 Alvin Dean Gas heating system for dehydrators and the like
EP0476548A3 (en) * 1990-09-19 1992-09-02 John Zink Gmbh Flare burner
RU2176050C2 (ru) * 1996-12-16 2001-11-20 Дудышев Валерий Дмитриевич Способ сжигания нефтяных газов и устройство для его осуществления
WO2020231775A1 (en) * 2019-05-10 2020-11-19 Vaprox LLC Clean burning gas flare tip
US11585530B2 (en) 2019-05-10 2023-02-21 Vaprox LLC Clean burning gas flare tip

Also Published As

Publication number Publication date
FR1581891A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1969-09-19
DE6610846U (de) 1977-12-01
DE1751987A1 (de) 1971-09-02
DE1751987B2 (de) 1976-11-18
GB1213848A (en) 1970-11-25

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