US3771940A - Smokeless gas flare with specific gravity gas analyzer for reducing noise - Google Patents

Smokeless gas flare with specific gravity gas analyzer for reducing noise Download PDF

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Publication number
US3771940A
US3771940A US00266794A US3771940DA US3771940A US 3771940 A US3771940 A US 3771940A US 00266794 A US00266794 A US 00266794A US 3771940D A US3771940D A US 3771940DA US 3771940 A US3771940 A US 3771940A
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United States
Prior art keywords
gas
steam
flare
specific gravity
burned
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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.)
Ceased
Application number
US00266794A
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English (en)
Inventor
J Stranahan
J Hollier
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Texaco Inc
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Texaco Inc
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Publication date
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Publication of US3771940A publication Critical patent/US3771940A/en
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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L7/00—Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam
    • F23L7/002—Supplying water
    • F23L7/005—Evaporated water; Steam

Definitions

  • aprimary object of this invention is to provide a method for burning unwanted hydrocarbons in a steam aspirating flare smokelessly, with less steam wastage, and with reduced noise levels.
  • a further object of this invention is to provide a method for controlling a steam aspirating gas flare for maintaining the flare smokeless with less steam usage and with reduced noise for all gases, from the lightest to the heaviest molecular weight gases.
  • a still further object of this invention is to provide a method for smokelessburning of undesired gas with reduced noise to vary the amount of air in the air-to-gas mixture relative to'the specific gravity of the gas to be burned.
  • Another primary object of this invention is to provide a gas flare for carrying out or practicing the method of the invention for burning undesired gas.
  • Still another object of this'invention is toprovide a steam aspirating gas flare that varies the amount of steam to the flare nozzle relative to the specific gravity of the gas to be burned for providing a smokeless air-togas burning mixture in the flare with less steam usage and reduced noise.
  • a further object of this invention is to provide a steam aspirating gas flare that has a steam flow controller responsive to a specific gravity analyzer for providing a smokeless flare utilizing the least steam possible for reducing noise.
  • Another object of this invention is to provide a gas flare for efficiently and smokelessly burning undesired gas having a wide range of molecular weight with less steam usage and reduced noise.
  • Still another object of this invention is to provide a smokeless flare that is easy to operate, is of simple configuration, and is economical to form and assemble.
  • the drawing diagrammatically illustratesby way of example, not by way of limitation, a smokeless flare.
  • FIGURE is a schematic diagram of a steam aspirating gas flare utilizing a specific gravity analyzer for forming an efficient smokeless flare with parts in section.
  • This invention comprises a method for maintaining a gas flare smokeless, and particularly with reduced noise when utilizing an aspirating steam nozzle and when the molecular weight of the hydrocarbon varies. Accordingly, in operation it is necessary to adjust the steam-togas ratio high to keep the flare smokeless when the highest molecular weight gas is going to the flame. Then when a lower molecular weight gas, such as low purity hydrogen is being supplied to the flare, it is very noisy.
  • a method for reducing this noise in a steam aspirating flare comprises the steps:
  • a high pressure gas aspirating flare the method comprises the steps:
  • the FIGURE discloses at least one steam aspirating gas flare 10, a flare control system 11, and a specific gravity analyzer 12 designed for carrying out or practicing the method of maintaining a smokeless flame in the flare with less steam usage and reduced noise.
  • the flare control system 11 may be a conventional system or like one disclosed in assignees Pat. application Ser. No. 192,453, filed Oct. 26, 1971, entitled Smokeless Gas Flare which comprises two portions, one portion for very low gas flow rates in which the rate is too low for accurate measuring and a second portion for all other varying flow rates.
  • the present invention comprises also an article for carrying out or practicing the method in the form of a specific gravity analyzer combined with a steam and gas control system to form the new and superior gas flare.
  • the flare 10 comprises a conventional steam aspirating gas flare in which steam, or any other gas, is blown through an aspirating nozzle to pull in air for mixing with the unwanted gas to be burned in the atmosphere.
  • a preferred gas flare is disclosed in assignees abovementioned patent application wherein the steam is controlled through a steam control system for the various flow rates of gas flow to provide the proper steam-togas ratio for each gas flow rate for accordingly producing the correct air-to-gas mixture in the flare burner to ensure a smokeless flame.
  • the new flare control system 1 1 comprises three flow rate detectors and transmitters 13, 14, and 15 which are conventional or like those disclosed in assignees above-identified patent application for detecting the flow rate of the gas in the main line 16. Previously, this flow rate information was transmitted straight to the steam flow controllers in the steam control system 17 for varying the steam in proportion to the gas flow rate for supplying to the flare for providing a smokeless airto-gas burning mixture therein. Steam control system 17 is conventional or as disclosed in assignees aboveidentified patent application.
  • a conventional specific gravity analyzer 12 such as but not limited to the Ranarexby Pfaudler Inc., New York, N.Y., has a specificgravity gas sample conditioner portion 18 having a continuous circulating system including an input-line 19 from the gas main line between the flow rate detectors 13 15 and the flare 10, compressor 20, filter 21, and coalescer 22, all for compressing and drying the gas.
  • a back-pressure regulator 23 is on return line 24 to the gas main line 16.
  • a gas slip-stream in line 25 is bled off the circulating system to a gas reducing valve 26, and a rotor-meter 27 for introducing the same volume of pressurized gas as air to the conventional specific gravity analyzer 12.
  • a ratio station 28 for multiplying the specific gravity output of 3-15 psi (pounds per square inch') for example by a factor between 0.7 and 1.7 is connected between the specific gravity analyzer l2 and a high pressure select relay 29, the latter. relay choosing the larger signal between the gas ratio station output signal and a3 psi air pressure output from air reducing valve 30 for providing a further multiplying factor to control three variable ratio controllers, such as but not limited to, pneumatic set ratios 31, 32, and 33. While only three pneumatic set ratios are shown, any number may be utilized, depending on the number of flow transmitters required for the particular design of the steam control system.
  • the pneumatic set ratios 31-33 multiply the output signals from the respective flow detectors by a factor relative to the specific gravity of the gas to be burned as relayed through high pressure select ratio 29 and ratio station 28 from the specific gravity analyzer l2.
  • a continuous conditioning of a gas sample is performed by portion 18 of the specific gravity analyzer before being processed through the specific gravity analyzer main portion 12.
  • a signal proportioned to the specific gravity of the gas is transmitted to the pneumatic ratios 31-33 via ratio station 28 and high pressure select relay 29 for conditioning andamplifying the output signal from the specific gravity analyzer 12.
  • the steam control signals form the gas flow detectors 13-15 which are proportional to the gas flow in the main line 16 are modified further in proportion to the specific gravity of the hydrocarbon or gas to be burned for controlling the steam flow controllers in the steam flow control system 17 for decreasing the steam flow or steam-to-gas ratio for light hydrocarbons, for example, for ensuring a smokeless air-to-gas burning mixture in the flare 10 with less steam used'and accordingly reduced noise.
  • a method for smokelessly burning gas with less noise in a steam aspirating flare having means for controlling the amount of steam to the flare for controlling the amount of air drawn in for mixing with the gas for burning, comprising the steps of,
  • a method for smokelessly burning gas with less noise in a high pressure gas aspirating flare having means for controlling the amount of high pressure gas to the aspirating flare for controlling the amount of air drawn in for mixing with the gas to be burned, comprising the steps of,
  • a method for smokelessly burning gas with less noise in a steam aspirating flare'having means for controlling the steam-to-gas ratio in the flare comprising the steps of, r g
  • a steam aspirating gas flare for smokeless burning with less noise of undesired gas comprising,
  • a. specific gravity analyzer means for determining the specific gravity of the gas to be burned
  • steam flow controller means for controlling the steam-to-gas mixture supplied to the flare
  • said steam flow controller means being responsive to said specific gravity analyzer means for varying the steam relative to the specific gravity of the gas to be burned for providing a smokeless air-to-gas burning mixture in the flare with less steam usage and reduced noise.
  • said specific gravity analyzer means comprises means forcontinuously analyzing the gas prior to being supplied to the flare for burning.
  • said specific gravity analyzer means comprises a specific gravity analyzer connected to the main line for continuously circulating the gas from the main line, through the specific gravity analyzer, and back to the main line for continuous analyzing of the gas prior to being burned in the flare.
  • a flare as recited in claim 10 including further,
  • said ratio varying means being responsive to said gas specific gravity analyzer means for controlling said steam flow controller means for controlling the steam-to-gas mixture relative to the specific gravity of the gas being burned.
  • said steam flow controller means has a first output steam-to-gas mixture ratio relative to the amount of gas flow to the flare, and
  • said steam flow controller means is responsive to said specific gravity analyzer means for varying said first output by varying the steam relative to the specific gravity'of the gas to be burned.
  • said steam flow controller means has a first steam output relative to the. amount of gas flow to the flare, and v b. said steam flow controller means is responsive to said specific gravity analyzer means for further varying said first output'relative to the specific gravity of the gas to be burned.
  • said steam flow'controller means is responsive to said specific gravity analyzer means for varying said first output in proportion to the specific gravity of the gas to be burned.
  • a steam aspirating gas flare for burning undesired gas having a steam flow controller comprising,
  • a main gas line connected to the flare, b. a specific gravity analyzer connected to said main gas line having an output, 0. a gas flow detector connected between said main gas lineand a steam flow controller having an outthe undesired gas with less steam usage and reduced noise.
  • variable ratio controller multiplies said gas flow detector output by the specific gravity analyzer output for ensuring smokeless burning of the undesired gas with less noise.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Regulation And Control Of Combustion (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Incineration Of Waste (AREA)
  • Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
  • Feeding And Controlling Fuel (AREA)
US00266794A 1972-06-27 1972-06-27 Smokeless gas flare with specific gravity gas analyzer for reducing noise Ceased US3771940A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US26679472A 1972-06-27 1972-06-27

Publications (1)

Publication Number Publication Date
US3771940A true US3771940A (en) 1973-11-13

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US00266794A Ceased US3771940A (en) 1972-06-27 1972-06-27 Smokeless gas flare with specific gravity gas analyzer for reducing noise

Country Status (10)

Country Link
US (1) US3771940A (enrdf_load_stackoverflow)
JP (1) JPS4957425A (enrdf_load_stackoverflow)
BE (1) BE801414A (enrdf_load_stackoverflow)
CA (2) CA983383A (enrdf_load_stackoverflow)
DE (1) DE2332077A1 (enrdf_load_stackoverflow)
ES (1) ES416303A1 (enrdf_load_stackoverflow)
FR (1) FR2191707A5 (enrdf_load_stackoverflow)
GB (1) GB1422608A (enrdf_load_stackoverflow)
IT (1) IT989468B (enrdf_load_stackoverflow)
NL (1) NL7308831A (enrdf_load_stackoverflow)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3837785A (en) * 1973-05-29 1974-09-24 Phillips Petroleum Co Apparatus for delivering waste fluids for combustion
US3914095A (en) * 1972-12-08 1975-10-21 Combustion Unltd Inc Vapor disposal system
US3973899A (en) * 1975-02-03 1976-08-10 John Zink Company Apparatus for using exhaust steam for smoke suppression in flares
US4035133A (en) * 1976-03-05 1977-07-12 Larcen Donald W Rotary burner control
US4036580A (en) * 1976-06-04 1977-07-19 John Zink Company Turbine-driven air-powered flare
US4094632A (en) * 1977-02-07 1978-06-13 John Zink Company Accelerated response for delivery of smoke suppressant to flares
US4227872A (en) * 1978-05-30 1980-10-14 John Zink Company Apparatus for supplying alternate gases to steam injection means on a flare stack
US6224369B1 (en) 1999-06-02 2001-05-01 David H. Moneyhun Device and method for burning vented fuel
US20090263755A1 (en) * 2008-04-18 2009-10-22 Nigro Robert C Off-gas flare
US20120015308A1 (en) * 2010-07-15 2012-01-19 John Zink Company, Llc Hybrid flare apparatus and method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011100225A1 (en) 2010-02-09 2011-08-18 Conocophillips Company Automated flare control

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
US2779399A (en) * 1952-02-29 1957-01-29 Zink Co John Flare stack gas burner
US2891607A (en) * 1956-12-10 1959-06-23 California Research Corp Flare stack steam control

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4926534A (enrdf_load_stackoverflow) * 1972-07-05 1974-03-09

Patent 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
US2779399A (en) * 1952-02-29 1957-01-29 Zink Co John Flare stack gas burner
US2891607A (en) * 1956-12-10 1959-06-23 California Research Corp Flare stack steam control

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3914095A (en) * 1972-12-08 1975-10-21 Combustion Unltd Inc Vapor disposal system
US3837785A (en) * 1973-05-29 1974-09-24 Phillips Petroleum Co Apparatus for delivering waste fluids for combustion
US3973899A (en) * 1975-02-03 1976-08-10 John Zink Company Apparatus for using exhaust steam for smoke suppression in flares
US4113418A (en) * 1976-03-05 1978-09-12 Larcen Donald W Rotary burner control
US4035133A (en) * 1976-03-05 1977-07-12 Larcen Donald W Rotary burner control
US4036580A (en) * 1976-06-04 1977-07-19 John Zink Company Turbine-driven air-powered flare
US4094632A (en) * 1977-02-07 1978-06-13 John Zink Company Accelerated response for delivery of smoke suppressant to flares
US4227872A (en) * 1978-05-30 1980-10-14 John Zink Company Apparatus for supplying alternate gases to steam injection means on a flare stack
US6224369B1 (en) 1999-06-02 2001-05-01 David H. Moneyhun Device and method for burning vented fuel
US20090263755A1 (en) * 2008-04-18 2009-10-22 Nigro Robert C Off-gas flare
US7811081B2 (en) 2008-04-18 2010-10-12 Moneyhun Equipment Sales & Service Off-gas flare
US20120015308A1 (en) * 2010-07-15 2012-01-19 John Zink Company, Llc Hybrid flare apparatus and method
US8629313B2 (en) * 2010-07-15 2014-01-14 John Zink Company, Llc Hybrid flare apparatus and method
EP2407719A3 (en) * 2010-07-15 2014-07-02 John Zink Company, L.L.C. Hybrid flare apparatus and method
EP2407718A3 (en) * 2010-07-15 2014-07-02 John Zink Company, L.L.C. Hybrid flare apparatus and method

Also Published As

Publication number Publication date
IT989468B (it) 1975-05-20
BE801414A (fr) 1973-12-26
CA983383A (en) 1976-02-10
NL7308831A (enrdf_load_stackoverflow) 1974-01-02
GB1422608A (en) 1976-01-28
FR2191707A5 (enrdf_load_stackoverflow) 1974-02-01
JPS4957425A (enrdf_load_stackoverflow) 1974-06-04
DE2332077A1 (de) 1974-01-03
CA1080607B (en) 1980-07-01
AU5720673A (en) 1975-01-09
ES416303A1 (es) 1976-06-01

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