US3554681A - Flare stack tip - Google Patents

Flare stack tip Download PDF

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Publication number
US3554681A
US3554681A US763266A US3554681DA US3554681A US 3554681 A US3554681 A US 3554681A US 763266 A US763266 A US 763266A US 3554681D A US3554681D A US 3554681DA US 3554681 A US3554681 A US 3554681A
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Prior art keywords
tip
air
gas
stack
outlet
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Expired - Lifetime
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US763266A
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English (en)
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Albert Edward Proctor
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Individual
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    • 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
    • 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

Definitions

  • a Hare stack tip has an inlet for receiving a dump gas, an outlet for emitting the dump gas to the atmosphere for subsequent combustion and means for introducing ambient air into the dump gas stream prior to its leaving said outlet.
  • the present invention relates to flare stack tip'assemblies.
  • Such assemblies are well known in the petroleum and chemical industries or oil renerie's, vsfhere theirfunction is to burn off Waste gases arising from a particular process. It is desirable that a are stack tip should achieve smokeless, noiseless combustion of the waste gases.
  • a flare stack tip including means for introducing ambient air into the .gas stream prior to its leaving the outlet of the stack and combusting. Further, there is provided a method of combustion in a flare stack tip wherein air is introduced into the gas stream prior to its leaving the outlet of the stack and combusting. Further, there is provided a method ofrcombustion in a are stack tip wherein air is introduced into the gas stream prior to its leaving the outlet of thestack and combusting.
  • the means for introducing ambient air into the gas stream can be a series of venturis or preferably one or more air-inducing devices based upon the phenomenon known as the Coanda eiect.
  • FIG. l is a side elevation of a are stack tip assembly made in accordance with the invention.
  • FIG. 2 is a plan view of the assembly of FIG. 1.
  • FIG. 3 is a part-sectional side elevation of the upper part of the are stack tip.
  • FIG. 4 is a sectional side elevation of detail A of FIG. 3 on an enlarged scale.
  • a are stack tip ⁇ assembly has a tubular member with an upper portion 13 and a lower portion 14.
  • the lower portion 14 is formed with a ange 11 at its lower end for connecting to a fixed stack (not shown).
  • the flare tip proper, designated 30, is connected with the upper portion 13 by any suitable method such as welding and comprises a lower frusto-conical part 1a and an upper tubular part 1.
  • the upper part 1 provides a are nozzle or outlet 50 which is lined with a suitable refr-actoiy material 15.
  • three pilot burners 2 of known design are arranged around the outlet 50 of the tip for igniting the emergent gas.
  • Each burner 2 has two pipes 3 and 6 connected with a flame nozzle in known manner and is attached to the -are tip 30 by means of detachable support members 4, 5.
  • the lower end of the frusto-conical part 1a carries a steam manifold 7 which communicates with a steam supply pipe 10 ICC attached to the tubular member by means of bracket 9.
  • the lower part of the steam pipe 10 has a flange 12 for connecting to a main steam supply pipe (not shown).
  • VThe are tip 30 has two rings of air inducing devices 40, 41 mounted with their axes extending obliquely relative to the axis of the stack, two of such devices being shown at the right hand ⁇ side of the ligure. As shown, the axis of device 40 extends at an angle of about 45 to the axis of the stack and the axis of the device 41 extends at an angle of about 30 thereto.
  • Each air inducing device 40, 41 is an air mover of known design which operates to draw ambient air from outside the stack and drive it into the tip 30 to meet the main gas stream flowing up through the stack. The construction and operation of lthe air-inducing device cc.
  • each such device preferably uses steam as an inducing medium, as in this embodiment, although it could use compressed air as an air inducing medium.
  • Steam is fed to each device 40, 41 from the steam manifold 7 via a conduit 42.
  • the tip 30 has two rings of simple locating members 43, 44 which can preferably be pivoted relative thereto.
  • the members 43, 44 are adapted to receive the devices 40, 41 and two such members are shown at the left hand side of the gure.
  • a gas 'diverter 45 is located within the tip 30 and coaxially thereof.
  • the diverter 45 is carried on support rods 46 extending radially from the walls of the tip 30.
  • the exact construction of the diverter 45 is shown in FIG. 4, where it can be seen that the diverter 45 has two leading walls 46 which form a nose 47 at their juncture.
  • the gas/ air mixture eventually emerges from the outlet 50 whereupon it is ignited by the burners 2.
  • the gas stream passesl axially up the flare stack in known manner until it meets the nose of the diverter 45 which splits up the gas stream and diverts it towards the walls of the tip.
  • the devices 40, 41 induce and inject ambient air into the gas stream and the particular construction of the diverter 45 and the arrangement of the devices 40, 41 is designed to achieve a gas/air collision Iangle as near t0 90 as possible without causing unnecessary back pressure against gas ow in the stacks.
  • the method of igniting the emergent gas by means of the burners 2 is well known in the art and suffice it to say that the pilot burners of this embodiment can either operate as a natural atmospheric system or as a forced draught system.
  • the devices 40, 41 may each have working ratio of about 20 lbs. of air induced to l lb. of steam consumed. For complete smokeless combustion, it has been calculated that with the tip of this embodiment of the invention 4 lbs. of air per lb. of flare gas is needed. Thus, a fth of a pound of steam is used for every 1 lb. of ared gas-a considerable improvement over the known methods.
  • a flare stack tip having (a) an inlet for receiving a dump gas
  • a are stack tip having (a) an inlet for receiving a dump gas
  • a are stack tip having (a) an inlet for receiving a dump gas
  • each air inducing device is of elongated aerofoil section and uses as an inducing medium uid injected into and transversely to the axis of said device by means of an annulus at the periphery of the inlet of said device.
  • a flare stack tip wherein the devices are arranged in two concentric rings (a) and (b), each of the devices in ring (a) is arranged ⁇ with its axis of air ow extending at an angle of about 45 to the longitudinal axis of the tip, and each of said devices 4 in ring (b) is arranged with its axis of air flow extending at an angle of about 30 to the longitudinal axis of the tip.
  • a flare stack tip according to claim 2, wherein the inducing medium is steam.
  • each inducing device uses compressed air as an inducing medium and there is further provided means for supplying compressed air to said device.
  • a flare stack tip according to claim 1, wherein the outlet is lined with a refractory material and there is provided pilot burners for igniting the dump gas emitted therefrom.
  • a flare stack tip according to claim 1, wherein there is provided a gas stream diverter disposed between the inlet and outlet and arranged to divert the dump gas obliquely-radially outwards relative to the longitudinal axis of the tip.

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  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Incineration Of Waste (AREA)
US763266A 1967-10-09 1968-09-27 Flare stack tip Expired - Lifetime US3554681A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB46103/67A GB1218189A (en) 1967-10-09 1967-10-09 Improvements in or relating to flare stack tips

Publications (1)

Publication Number Publication Date
US3554681A true US3554681A (en) 1971-01-12

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ID=10439852

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Application Number Title Priority Date Filing Date
US763266A Expired - Lifetime US3554681A (en) 1967-10-09 1968-09-27 Flare stack tip

Country Status (4)

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US (1) US3554681A (fr)
CH (1) CH513365A (fr)
FR (1) FR1585340A (fr)
GB (1) GB1218189A (fr)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3814567A (en) * 1972-02-22 1974-06-04 Zink Co John Smokeless flare using liquid water particles
US3817695A (en) * 1972-06-13 1974-06-18 Zink Co John Airductor flare
US3932111A (en) * 1974-10-29 1976-01-13 Black, Sivalls & Bryson, Inc. Apparatus for incinerating combustible wastes
US4457696A (en) * 1980-09-24 1984-07-03 John Zink Company Large capacity air-powered smokeless flare
US4538982A (en) * 1982-04-05 1985-09-03 Mcgill Incorporated Flare gas combustion apparatus
US4548577A (en) * 1983-04-18 1985-10-22 Mcgill Incorporated Linear combustion apparatus for atmospheric burning of flare gases
US4643669A (en) * 1985-08-26 1987-02-17 Peabody Engineering Corporation Smokeless flare gas burner
US5096679A (en) * 1988-04-01 1992-03-17 The Standard Oil Company System to mitigate the effect of an environmental release of a contaminant gas
US5145651A (en) * 1988-04-01 1992-09-08 The Standard Oil Company System to mitigate the effect of an environmental release of a contaminant gas
US5865613A (en) * 1996-11-05 1999-02-02 Rajewski; Robert Carl Steam over air flare tip
FR2788112A1 (fr) * 1998-12-30 2000-07-07 Total Raffinage Distribution Appareil de type torchere et procede pour la combustion de gaz
WO2002086386A1 (fr) * 2001-04-18 2002-10-31 Aramco Services Company Procede et appareil de combustion pour torche de brulage
US20040110105A1 (en) * 2002-12-04 2004-06-10 Rajewski Robert C. Flare stack operating on coanda principle
US20060121399A1 (en) * 2004-12-02 2006-06-08 Saudi Arabian Oil Company Flare stack combustion method and apparatus
US9416966B2 (en) 2014-07-25 2016-08-16 Flame Commander Corp. Venturi nozzle for a gas combustor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9524923D0 (en) * 1995-12-06 1996-02-07 Montrose Fire & Emergency Trai Clean burn nozzle

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3814567A (en) * 1972-02-22 1974-06-04 Zink Co John Smokeless flare using liquid water particles
US3817695A (en) * 1972-06-13 1974-06-18 Zink Co John Airductor flare
US3932111A (en) * 1974-10-29 1976-01-13 Black, Sivalls & Bryson, Inc. Apparatus for incinerating combustible wastes
US4457696A (en) * 1980-09-24 1984-07-03 John Zink Company Large capacity air-powered smokeless flare
US4538982A (en) * 1982-04-05 1985-09-03 Mcgill Incorporated Flare gas combustion apparatus
US4548577A (en) * 1983-04-18 1985-10-22 Mcgill Incorporated Linear combustion apparatus for atmospheric burning of flare gases
US4643669A (en) * 1985-08-26 1987-02-17 Peabody Engineering Corporation Smokeless flare gas burner
US5096679A (en) * 1988-04-01 1992-03-17 The Standard Oil Company System to mitigate the effect of an environmental release of a contaminant gas
US5145651A (en) * 1988-04-01 1992-09-08 The Standard Oil Company System to mitigate the effect of an environmental release of a contaminant gas
US5865613A (en) * 1996-11-05 1999-02-02 Rajewski; Robert Carl Steam over air flare tip
FR2788112A1 (fr) * 1998-12-30 2000-07-07 Total Raffinage Distribution Appareil de type torchere et procede pour la combustion de gaz
WO2000040902A1 (fr) * 1998-12-30 2000-07-13 Total Raffinage Distribution S.A. Appareil de type torchere et procede pour la combustion de gaz
WO2002086386A1 (fr) * 2001-04-18 2002-10-31 Aramco Services Company Procede et appareil de combustion pour torche de brulage
US20040248055A1 (en) * 2001-04-18 2004-12-09 Mashhour Mazen M. Flare stack combustion apparatus and method
US7247016B2 (en) 2001-04-18 2007-07-24 Saudi Arabian Oil Company Flare stack combustion apparatus and method
US20040110105A1 (en) * 2002-12-04 2004-06-10 Rajewski Robert C. Flare stack operating on coanda principle
US6960075B2 (en) 2002-12-04 2005-11-01 Rajewski Robert C Flare stack operating on Coanda principle
US20060121399A1 (en) * 2004-12-02 2006-06-08 Saudi Arabian Oil Company Flare stack combustion method and apparatus
WO2006060687A3 (fr) * 2004-12-02 2007-07-05 Saudi Arabian Oil Co Procede et appareil de combustion pour une torchere
US7354265B2 (en) * 2004-12-02 2008-04-08 Saudi Arabian Oil Company Flare stack combustion method and apparatus
AU2005311720B2 (en) * 2004-12-02 2009-01-08 Saudi Arabian Oil Company Flare stack combustion method and apparatus
EA014471B1 (ru) * 2004-12-02 2010-12-30 Сауди Арейбиен Ойл Компани Сжигающая колонна и способ ее работы
US8096803B2 (en) 2004-12-02 2012-01-17 Saudi Arabian Oil Company Flare stack combustion method and apparatus
US9416966B2 (en) 2014-07-25 2016-08-16 Flame Commander Corp. Venturi nozzle for a gas combustor
US9739481B2 (en) 2014-07-25 2017-08-22 Flame Commander Corp. Venturi nozzle for a gas combustor

Also Published As

Publication number Publication date
FR1585340A (fr) 1970-01-16
GB1218189A (en) 1971-01-06
DE1801469B2 (de) 1976-08-19
DE1801469A1 (de) 1969-06-19
CH513365A (fr) 1971-09-30

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