US3833335A - Flare installation for the combustion of hydrocarbon gas with prior admixing of air - Google Patents

Flare installation for the combustion of hydrocarbon gas with prior admixing of air Download PDF

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Publication number
US3833335A
US3833335A US00385329A US38532973A US3833335A US 3833335 A US3833335 A US 3833335A US 00385329 A US00385329 A US 00385329A US 38532973 A US38532973 A US 38532973A US 3833335 A US3833335 A US 3833335A
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US
United States
Prior art keywords
combustible gas
gas
feed chamber
combustion
air
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
US00385329A
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English (en)
Inventor
F Lazarre
J Rozand
G Blu
J Bimond
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.)
Societe Nationale des Petroles dAquitaine SA
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Societe Nationale des Petroles dAquitaine SA
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • 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

  • An improved flare installation to burn excess hydrocarbon gas comprising a mixing chamber receiving atmospheric air and having an-inlet for gases from a low-pressure separator, and an injector for gas from a FLARE INSTALLATION FOR THE COMBUSTION OF HYDROCARBON GAS WITH PRIOR ADMIXING OF AIR
  • This invention concerns an improved device for the combustion of hydrocarbon gases, with prior admixing of air.
  • Gas discharged by high-pressure and low-pressure separators are usually sent to different flares. Combustion is always incomplete, since the oxygen supply is insufficient, obtained as it is by diffusion around the flame. This results in constant black smoke and the fallout of unburnt matter in the form of carbon particles or droplets of hydrocarbons condensed by the process of expansion, while the flame itself is of high radiance and brilliance.
  • the device according to the invention obviates these drawbacks by feeding the flares with a mixture of gas and air in proportions ensuring complete combustion, thus avoiding pollution, practically eliminating heat radiation, and precluding the formation of hydrates.
  • This new installation for the combustion of excess gas from wells or hydrocarbon processing plants, with means for the separation of oil or condensate from gas, and passages to convey such gas after it has been separated from the oil or condensate, is characterized by the fact that it is supported on a raised structure above ground level and comprises a feed chamber provided with adjustable air inlets, a mixing chamber adjacent to the divergent passage which may be preceded by a convergent passage, at least one injector of combustible gas under pressure, located at the opening between the feed chamber and mixing chamber, and a burner at the opposite end of this mixing chamber, opening into the atmosphere, and comprising means for igniting the flare, and means of controlling combustion.
  • the installation comprises an inlet passage for combustible gas, leading from the storage tanks and low-pressure separators to the feed chamber, above the pressurized combustible gas injector.
  • the means of adjusting the air supply consist of a system to control the position of the pressurized combustible gas injectors in relation to the opening between the feed chamber and mixing chamber.
  • the means supporting the device consist of a tower made up of assembled sectional or tubular components with struts and wind-braces, provided with convenient means for fixing the high-pressure and lowpressure gas feed pipes and electric cables for igniting the flare and controlling combustion.
  • the means supporting the burner consist of a braced upright tube, provided with side openings for the admission of air, the mixing chamber being located above these openings, and the tube being equipped with convenient means for fixing the highpressure and low-pressure gas feed pipes and electric cables required for igniting the flare and controlling combustion.
  • Such a device is illustrated by way of example below.
  • the FIGURE shows, at a production centre, means of separating oil or condensate from gas, consisting of a high-pressure separator (1) fed from a well or a collector (not shown here), with a high-pressure gas outlet (2) and an outlet (3) for partially degassed liquid. This liquid is fed into a low-pressure separator (4) with lowpressure gas outlet (5) and an oil or condensate outlet (6).
  • the flare installation is fixed above ground level on a support (7), which may be a structure consisting of assembled sectional elements with struts and windbraces, bolted together and provided with the necessary means of fixing the high-pressure and low-pressure gas feed pipes (8 and 9 respectively) and electric cables required for igniting the flare and controlling combustion (not shown here).
  • a support (7) which may be a structure consisting of assembled sectional elements with struts and windbraces, bolted together and provided with the necessary means of fixing the high-pressure and low-pressure gas feed pipes (8 and 9 respectively) and electric cables required for igniting the flare and controlling combustion (not shown here).
  • the feed chamber (10) is provided with adjustable air inlets (such as 11 and an inlet for the admission of combustible gas from the low-pressure separator, located above an injector (13) of combustible'gas from the high-pressure separator.
  • This injector is located on the axis of a mixing chamber (14) adjacent to the feed chamber, which also includes a convergent passage (15) followed by a divergent passage (16).
  • the position of the outlet of the injector (13), relative to the plane of the mixing chamber entrance, is adjustable by translational movement along the mixing chamber axis by means of a telescopic system (19), for example.
  • the choice of the position of the injector outlet constitutes one of the parameters determining the air/gas ratio in the mixing chamber.
  • a combustion flue (17) opens into the atmosphere through an interposed grid or funnel (18), to prevent flashback.
  • the devices (20) for igniting the torch and controlling the flame are conventional.
  • This flare device makes it possible to obtain a gaseous mixture ensuring complete combustion.
  • the flame obtained is thus transparent and of low radiance, the combustion gases released are neutral and nonpolluting, and the combustion process does not produce any unburnt matter, liquid or solid. Moreover, the
  • the operation of the combustion device requires no power supply: the air required for combustion is supplied by atmospheric induction through an injector which works by using part of the power supplied by the high-pressure gas. Where the plant is fed with gaseous residues from refineries, it may be advisable to supply either additional combustible gas at high pressure, or sufficient power to draw in thevolume of air required for the combustion of gases composed of heavy substances and supplied at comparatively low pressure.
  • a flare device for the combustion of excess combustible gas comprising means for separating said combustible gas from oil and condensate contained therein and for supplying separated combustible gas through two different ducts at two different pressures,
  • a high pressure injector connected to introduce combustible gas from the duct carrying gas at the higher of said pressures into said feed chamber and thereby suck air into said feed chamber through said air inlet means
  • a flare device as claimed in claim 1 in which said divergent passage is preceded by a convergent passage in said mixing chamber communicating directly with said feed chamber.

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  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Incineration Of Waste (AREA)
US00385329A 1972-08-04 1973-08-03 Flare installation for the combustion of hydrocarbon gas with prior admixing of air Expired - Lifetime US3833335A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7228207A FR2195327A5 (enExample) 1972-08-04 1972-08-04

Publications (1)

Publication Number Publication Date
US3833335A true US3833335A (en) 1974-09-03

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ID=9102894

Family Applications (1)

Application Number Title Priority Date Filing Date
US00385329A Expired - Lifetime US3833335A (en) 1972-08-04 1973-08-03 Flare installation for the combustion of hydrocarbon gas with prior admixing of air

Country Status (13)

Country Link
US (1) US3833335A (enExample)
JP (1) JPS49132627A (enExample)
AT (1) AT329725B (enExample)
BE (1) BE803181A (enExample)
BR (1) BR7305943D0 (enExample)
CA (1) CA983382A (enExample)
DE (1) DE2339521A1 (enExample)
ES (1) ES417589A1 (enExample)
FR (1) FR2195327A5 (enExample)
GB (1) GB1419333A (enExample)
IT (1) IT992794B (enExample)
NL (1) NL7310849A (enExample)
NO (1) NO136116C (enExample)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4741691A (en) * 1987-01-20 1988-05-03 Messimer Joseph L Waste gas burner
US4900244A (en) * 1984-08-29 1990-02-13 John Zink Company Gas flaring method and apparatus
US5938422A (en) * 1996-04-16 1999-08-17 The Boc Group Plc Removal of noxious substances from gas streams
US5971744A (en) * 1997-06-11 1999-10-26 Eaton; Timothy C. Gas burner tool for purging a gas supply pipe
US6239078B1 (en) 1992-03-30 2001-05-29 Tropicana Products, Inc. Matter of composition and method for using the same as plant bioregulators
US20090317754A1 (en) * 2008-06-24 2009-12-24 Mcfatter Ii William E Flare gas flammability control

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4140471A (en) * 1977-05-09 1979-02-20 National Airoil Burner Company, Inc. Ground flare stack
FR2526525A1 (fr) * 1982-05-06 1983-11-10 Chaudot Gerard Systeme de securite destine notamment a eliminer les liquides entraines ou condenses, lors du torchage ou de la dispersion de gaz d'hydrocarbures
GB2142132B (en) * 1983-06-21 1986-04-09 London Brick Landfill Limited Apparatus and method for collecting and burning landfill or other waste gas
AT407435B (de) * 1997-10-03 2001-03-26 Voest Alpine Ind Anlagen Verfahren zum entsorgen von gasen
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
US2761496A (en) * 1951-06-29 1956-09-04 Exxon Research Engineering Co Flare stack apparatus for burning waste gases
US2802521A (en) * 1950-03-15 1957-08-13 Sinclair Refining Co Waste gas burner
US3756765A (en) * 1971-03-17 1973-09-04 D Sparrow Automatic flare igniter and counterbalanced flare stack

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2802521A (en) * 1950-03-15 1957-08-13 Sinclair Refining Co Waste gas burner
US2761496A (en) * 1951-06-29 1956-09-04 Exxon Research Engineering Co Flare stack apparatus for burning waste gases
US3756765A (en) * 1971-03-17 1973-09-04 D Sparrow Automatic flare igniter and counterbalanced flare stack

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4900244A (en) * 1984-08-29 1990-02-13 John Zink Company Gas flaring method and apparatus
US4741691A (en) * 1987-01-20 1988-05-03 Messimer Joseph L Waste gas burner
US6239078B1 (en) 1992-03-30 2001-05-29 Tropicana Products, Inc. Matter of composition and method for using the same as plant bioregulators
US5938422A (en) * 1996-04-16 1999-08-17 The Boc Group Plc Removal of noxious substances from gas streams
US5971744A (en) * 1997-06-11 1999-10-26 Eaton; Timothy C. Gas burner tool for purging a gas supply pipe
US20090317754A1 (en) * 2008-06-24 2009-12-24 Mcfatter Ii William E Flare gas flammability control
US7931466B2 (en) * 2008-06-24 2011-04-26 Equistar Chemicals, Lp Flare gas flammability control

Also Published As

Publication number Publication date
NL7310849A (enExample) 1974-02-06
AU5893873A (en) 1975-02-06
JPS49132627A (enExample) 1974-12-19
ES417589A1 (es) 1976-03-16
CA983382A (en) 1976-02-10
BE803181A (fr) 1973-12-03
GB1419333A (en) 1975-12-31
FR2195327A5 (enExample) 1974-03-01
BR7305943D0 (pt) 1974-05-16
AT329725B (de) 1976-05-25
ATA687173A (de) 1975-08-15
DE2339521A1 (de) 1974-02-14
IT992794B (it) 1975-09-30
NO136116B (enExample) 1977-04-12
NO136116C (no) 1977-07-20

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