CA1080607B - Smokeless gas flare with specific gravity gas analyzer for reducing noise - Google Patents
Smokeless gas flare with specific gravity gas analyzer for reducing noiseInfo
- Publication number
- CA1080607B CA1080607B CA345,188A CA345188A CA1080607B CA 1080607 B CA1080607 B CA 1080607B CA 345188 A CA345188 A CA 345188A CA 1080607 B CA1080607 B CA 1080607B
- Authority
- CA
- Canada
- Prior art keywords
- gas
- steam
- specific gravity
- flare
- burned
- 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
Links
- 230000005484 gravity Effects 0.000 title claims abstract description 81
- 238000000034 method Methods 0.000 claims abstract description 30
- 239000000203 mixture Substances 0.000 claims abstract description 21
- 230000003750 conditioning effect Effects 0.000 claims abstract description 13
- 230000001143 conditioned effect Effects 0.000 claims description 13
- 239000007789 gas Substances 0.000 description 87
- 229930195733 hydrocarbon Natural products 0.000 description 5
- 150000002430 hydrocarbons Chemical class 0.000 description 5
- 239000004215 Carbon black (E152) Substances 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003915 air pollution Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Sampling And Sample Adjustment (AREA)
- Regulation And Control Of Combustion (AREA)
- Incineration Of Waste (AREA)
- Feeding And Controlling Fuel (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Abstract
ABSTRACT
A method is described 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, com-prising the steps of, (a) determining the specific gravity of the gas to be burned by means of a specific gravity analyzer which provides an output signal, and (b) varying the amount of high pressure aspirating gas to the flare relative to the specific gravity of the gas to be burned, including the step of conditioning the said output signal to decrease the amount of high pressure aspirating gas when the gas to be burned is of low specific gravity, for providing a smokeless air-to-gas burning mixture in the flare with less high pressure gas usage and reduced noise. An apparatus for carrying out the method is also described.
A method is described 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, com-prising the steps of, (a) determining the specific gravity of the gas to be burned by means of a specific gravity analyzer which provides an output signal, and (b) varying the amount of high pressure aspirating gas to the flare relative to the specific gravity of the gas to be burned, including the step of conditioning the said output signal to decrease the amount of high pressure aspirating gas when the gas to be burned is of low specific gravity, for providing a smokeless air-to-gas burning mixture in the flare with less high pressure gas usage and reduced noise. An apparatus for carrying out the method is also described.
Description
1~8{)~()7 BACKGROUND OF THE INVENTION
The government requires the burning of all excess gases being admitted to the atmosphere. The collection of these gases is normally put into a flare line which is equipped with a pilot light to ensure the burning of all gases.
Recent regulations require that this burning be smokeless in order to reduce air pollution and to be quieter to reduce noise pollution.
In order to keep a flare smokeless, as a steam aspirating gas flare for example, the relative amount of steam used to draw in air for mixing with the gas must be increased greatly as the average molecular weight of the hydrocarbon increases. Accordingly in operation, it has been necessary to set the steam-to-gas ratio high in order to maintain the flare smokeless when the highest molecular weight gas is being supplied to the flare. Thus when a low molecular weight material, such as low purity hydrogen is going to the flare, the flare is noisy due to the roar of the steam jet in the aspirating flare nozzle. It often can be heard from two to ten miles away.
OBJECTS OF THE INVENTION
Accordingly, a primary 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 smokeless burning of undesired gas with reduced noise to - . : . - :
.
: - . .
, : -:
1~8~607 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 to provide 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-to-gas 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 econom-ical to form and assemble.
Other objects and various advantages of the disclosed method and smokeless flare for carrying out the method will be apparent from the following detailed description together with the accompanying drawing, submitted for purposes of illustration only, and not intended to define the scope of the invention, reference being had for that purpose to the sub-joined claims.
The drawing diagrammatically illustrates by way of example, not ; by way of limitation, a smokeless f]are.
~ ' ' .' ' ' ' ~08~6~7 BRIEF DESCRIPTION OF THE DRAWING
The 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.
METHOD OF MAINTAINING A GAS FLARE
SMOKELESS WITH REDUCED NOISE
-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-to-gas 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. The present invention provides 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) determining the specific gravity of the gas being burned by means of a specific gravity analyzer which provides an output signal, and (b) varying the amount of steam to the flare relative to the specific gravity of the gas to be burned, including the step of conditioning the said output signal to decrease the amount of steam when the gas to be burned is of low specific gravity, for providing a smokeless air-to-gas burning mixture in the flare with less steam usage and reduced noise.
In greater detail the method comprises the additional steps: (c) determining the amount of steam required to maintain a desired steam-to-gas ratio for the flare gas flow, and (d) multiplying the amount of steam supplied by a factor relative to the conditioned output signal of the specific gravity analyzer to provide a smokeless air-to-gas burning mixture ' .. . ~
10~ iO7 in the flare with less noise.
The last step above may be recited in greater detail as the step:
(e) varying the amount of steam in the steam-to-gas ratio in proportion to the conditioned output signal of the specific gravity analyzer for providing a smokeless air-to-gas burning mixture in the flare with less steam and reduced noise.
In a high pressure gas aspirating flare the method comprises the steps: (a) determining the specific gravity of the gas to be burned by means of a specific gravity analyzer which provides an output signal and (b) varying the amount of high pressure aspirating gas to the flare ralative to the specific gravity of the gas to be burned, including the step of conditioning the said output signal to decrease the amount of high pressure aspirating gas when the gas to be burned is of low specific gravity, for providing a smokeless air-to-gas burning mixture in the flare with less high pressure gas usage and reduced noise.
DESCRIPTION OF THE PREFERRED EMBODIMENT
The invention disciosed herein, the scope of which being defined in the appended claims is not limited in its application to details of construction and arrangement of parts shown and described, since the inven-tion is capable of other embodiments and of being practiced or carried outin various other ways. Also it is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation.
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 10 with less steam usage and reduced noise. The flare control system 11 may be a conventional system or like one disclosed in Assignee's patent application Serial No. 192,4~3, filed October 26, 1971, now U.S.
~ ' ' '- .
~1~8Vtjl~
Patent 3,771,940, issued November 13, 1973, 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. me present invention comprises also an article for carrying out or practicing the method in the form of a specific gravity analyzer and circuit for conditioning the analyzer output signal combined with a steam and gas control system to form the new and superior gas flare.
IMPROVED GAS FLARE SYSTEM
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 Assignee's above-identified U.S.
Patent wherein the steam is controlled through a steam control system for the various flow rates of gas flow to provide the proper steam-to-gas 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 11 comprises three flow rate detectors and transmitters 13, 14, and 15 which are conventional or like those disclosed in Assignee's aboveidentified U.S. Patent 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 air-to-gas burning mixture therein. Steam control system 17 is conventional or as disclosed in Assignee's above-identified U.S. Patent.
A conventional specific gravity analyzer 12, such as but not limited to the "Ranarex" by Pfaudler Inc., New York, New York, has a specific ' : ' :
.
.
- : :
1~}8V~qJ7 gravity gas sample pre-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. Because the above described "Ranarex" specific gravity analyzer operates automatically and continuously in generating continuous specific gravity signals, and because analyzers of the torque type are more accurate and sensitive to instantaneous changes in the incoming gas sample, its output signal is readily adaptable for being conditioned by the following means or circuit.
A ratio station 28 for multiplying the specific gravity analyzer output signal of 3-15 psi ~pounds per square inch) or .211-1.055 Kilograms per square centimeter, for example by a factor between .7 and 1.7 is connected ~-between the specific gravity analyzer 12 and a high pressure select relay 29, the latter relay choosing the larger signal between the gas ratio station output signal and a three 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. With the latter ratios connected between the gas flow detectors 13-15 and the steam flow controller system 17, 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 ' ' ~
, 108V61~7 and ratio station 28 from the specific gravity analyzer 12.
OPERATION
In the disclosed smokeless steam aspirating gas flare where the steam is supplied to the aspirating flare nozzle in proportion to the gas flow, this steam flow is further controlled in proportion to the specific gravity of the gas to be burned.
In greater detail, as the gas to be burned flows through the gas main line to the flare, a continuous pre-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 and amplifying the output signal from the specific gravity analyzer 12. The above two elements 28 and 29 are a schematic representation of a whole circuit system or means for conditioning the output signals of the specific gravity analyzer as illustrated in the Figure. Here the steam control signals from 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.
Thus a method and at least one mechanism for carrying out or practicing the method is disclosed for smokeless burning of undesired gas in a steam aspirating flare with less steam usage and reduced noise in a manner which meets each of the objects set forth above.
: -. . : . . :
.
. , '' : ' ~. . :
- : . . . , : .
- - : : : :
. , ~ . , . .: . -. :
.
- - . : : -: -6)6()7 ~ hile a method and a smokeless gas flare with less steam usage and reduced noise for carrying out the method of the inventior. have been disclosed in the accompanying specification and drawing, it will be evident that various other methods and modifications are possible in the arrangement and construction of the disclosed smokeless flare with less steam usage and reduced noise without departing from the scope of the invention, and it is accordingly desired to comprehend within the purview of this invention such methods and modifications as may be considered to fall within the scope of the appended claims.
- - . :
.'
The government requires the burning of all excess gases being admitted to the atmosphere. The collection of these gases is normally put into a flare line which is equipped with a pilot light to ensure the burning of all gases.
Recent regulations require that this burning be smokeless in order to reduce air pollution and to be quieter to reduce noise pollution.
In order to keep a flare smokeless, as a steam aspirating gas flare for example, the relative amount of steam used to draw in air for mixing with the gas must be increased greatly as the average molecular weight of the hydrocarbon increases. Accordingly in operation, it has been necessary to set the steam-to-gas ratio high in order to maintain the flare smokeless when the highest molecular weight gas is being supplied to the flare. Thus when a low molecular weight material, such as low purity hydrogen is going to the flare, the flare is noisy due to the roar of the steam jet in the aspirating flare nozzle. It often can be heard from two to ten miles away.
OBJECTS OF THE INVENTION
Accordingly, a primary 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 smokeless burning of undesired gas with reduced noise to - . : . - :
.
: - . .
, : -:
1~8~607 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 to provide 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-to-gas 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 econom-ical to form and assemble.
Other objects and various advantages of the disclosed method and smokeless flare for carrying out the method will be apparent from the following detailed description together with the accompanying drawing, submitted for purposes of illustration only, and not intended to define the scope of the invention, reference being had for that purpose to the sub-joined claims.
The drawing diagrammatically illustrates by way of example, not ; by way of limitation, a smokeless f]are.
~ ' ' .' ' ' ' ~08~6~7 BRIEF DESCRIPTION OF THE DRAWING
The 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.
METHOD OF MAINTAINING A GAS FLARE
SMOKELESS WITH REDUCED NOISE
-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-to-gas 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. The present invention provides 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) determining the specific gravity of the gas being burned by means of a specific gravity analyzer which provides an output signal, and (b) varying the amount of steam to the flare relative to the specific gravity of the gas to be burned, including the step of conditioning the said output signal to decrease the amount of steam when the gas to be burned is of low specific gravity, for providing a smokeless air-to-gas burning mixture in the flare with less steam usage and reduced noise.
In greater detail the method comprises the additional steps: (c) determining the amount of steam required to maintain a desired steam-to-gas ratio for the flare gas flow, and (d) multiplying the amount of steam supplied by a factor relative to the conditioned output signal of the specific gravity analyzer to provide a smokeless air-to-gas burning mixture ' .. . ~
10~ iO7 in the flare with less noise.
The last step above may be recited in greater detail as the step:
(e) varying the amount of steam in the steam-to-gas ratio in proportion to the conditioned output signal of the specific gravity analyzer for providing a smokeless air-to-gas burning mixture in the flare with less steam and reduced noise.
In a high pressure gas aspirating flare the method comprises the steps: (a) determining the specific gravity of the gas to be burned by means of a specific gravity analyzer which provides an output signal and (b) varying the amount of high pressure aspirating gas to the flare ralative to the specific gravity of the gas to be burned, including the step of conditioning the said output signal to decrease the amount of high pressure aspirating gas when the gas to be burned is of low specific gravity, for providing a smokeless air-to-gas burning mixture in the flare with less high pressure gas usage and reduced noise.
DESCRIPTION OF THE PREFERRED EMBODIMENT
The invention disciosed herein, the scope of which being defined in the appended claims is not limited in its application to details of construction and arrangement of parts shown and described, since the inven-tion is capable of other embodiments and of being practiced or carried outin various other ways. Also it is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation.
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 10 with less steam usage and reduced noise. The flare control system 11 may be a conventional system or like one disclosed in Assignee's patent application Serial No. 192,4~3, filed October 26, 1971, now U.S.
~ ' ' '- .
~1~8Vtjl~
Patent 3,771,940, issued November 13, 1973, 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. me present invention comprises also an article for carrying out or practicing the method in the form of a specific gravity analyzer and circuit for conditioning the analyzer output signal combined with a steam and gas control system to form the new and superior gas flare.
IMPROVED GAS FLARE SYSTEM
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 Assignee's above-identified U.S.
Patent wherein the steam is controlled through a steam control system for the various flow rates of gas flow to provide the proper steam-to-gas 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 11 comprises three flow rate detectors and transmitters 13, 14, and 15 which are conventional or like those disclosed in Assignee's aboveidentified U.S. Patent 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 air-to-gas burning mixture therein. Steam control system 17 is conventional or as disclosed in Assignee's above-identified U.S. Patent.
A conventional specific gravity analyzer 12, such as but not limited to the "Ranarex" by Pfaudler Inc., New York, New York, has a specific ' : ' :
.
.
- : :
1~}8V~qJ7 gravity gas sample pre-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. Because the above described "Ranarex" specific gravity analyzer operates automatically and continuously in generating continuous specific gravity signals, and because analyzers of the torque type are more accurate and sensitive to instantaneous changes in the incoming gas sample, its output signal is readily adaptable for being conditioned by the following means or circuit.
A ratio station 28 for multiplying the specific gravity analyzer output signal of 3-15 psi ~pounds per square inch) or .211-1.055 Kilograms per square centimeter, for example by a factor between .7 and 1.7 is connected ~-between the specific gravity analyzer 12 and a high pressure select relay 29, the latter relay choosing the larger signal between the gas ratio station output signal and a three 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. With the latter ratios connected between the gas flow detectors 13-15 and the steam flow controller system 17, 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 ' ' ~
, 108V61~7 and ratio station 28 from the specific gravity analyzer 12.
OPERATION
In the disclosed smokeless steam aspirating gas flare where the steam is supplied to the aspirating flare nozzle in proportion to the gas flow, this steam flow is further controlled in proportion to the specific gravity of the gas to be burned.
In greater detail, as the gas to be burned flows through the gas main line to the flare, a continuous pre-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 and amplifying the output signal from the specific gravity analyzer 12. The above two elements 28 and 29 are a schematic representation of a whole circuit system or means for conditioning the output signals of the specific gravity analyzer as illustrated in the Figure. Here the steam control signals from 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.
Thus a method and at least one mechanism for carrying out or practicing the method is disclosed for smokeless burning of undesired gas in a steam aspirating flare with less steam usage and reduced noise in a manner which meets each of the objects set forth above.
: -. . : . . :
.
. , '' : ' ~. . :
- : . . . , : .
- - : : : :
. , ~ . , . .: . -. :
.
- - . : : -: -6)6()7 ~ hile a method and a smokeless gas flare with less steam usage and reduced noise for carrying out the method of the inventior. have been disclosed in the accompanying specification and drawing, it will be evident that various other methods and modifications are possible in the arrangement and construction of the disclosed smokeless flare with less steam usage and reduced noise without departing from the scope of the invention, and it is accordingly desired to comprehend within the purview of this invention such methods and modifications as may be considered to fall within the scope of the appended claims.
- - . :
.'
Claims (20)
1. 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) determining the specific gravity of the gas being burned by means of a specific gravity analyzer which provides an output signal, and (b) varying the amount of steam to the flare relative to the specific gravity of the gas to be burned, including the step of conditioning the said output signal to decrease the amount of steam when the gas to be burned is of low specific gravity, for providing a smokeless air-to-gas burning mixture in the flare with less steam usage and reduced noise.
2. A method as recited in Claim 1 including the additional steps of (a) varying the amount of steam relative to the amount of gas flowing to the flare, and (b) varying the first amount of steam to a second amount of steam relative to the conditioned output signal of the specific gravity analyzer for providing a smokeless air-to-gas burning mixture in the flare with less steam usage and reduced noise.
3. A method as recited in Claim 1 wherein the second step com-prises further (a) determining the amount of steam required to maintain a desired steam-to-gas ratio for the flare for the particular amount of gas flow, and (b) multiplying the amount of steam supplied by a factor relative to the conditioned output signal of the specific gravity analyzer for providing the smokeless air-to-gas burning mix-ture in the flare with less noise.
4. A method as recited in Claim 1 wherein the second step comprises further (a) determining the amount of steam required to maintain a desired steam-to-gas ratio for the flare gas flow, and (b) varying the steam-to-gas ratio relatively to the conditioned output signal of the specific gravity analyzer for providing a smokeless air-to-gas burning mixture in the flare with less noise.
5. 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) determining the specific gravity of the gas to be burned by means of a specific gravity analyzer which provides an output signal, and (b) varying the amount of high pressure aspirating gas to the flare relative to the specific gravity of the gas to be burned, including the step of conditioning the said output signal to decrease the amount of high pressure aspirating gas when the gas to be burned is of low specific gravity, for providing a smokeless air-to-gas burning mixture in the flare with less high pressure gas usage and reduced noise.
6. 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 (a) determining a first steam-to-gas ratio relative to the amount of gas flow to the flare, (b) determining the specific gravity of the gas to be burned by means of a specific gravity analyzer which provides an output signal, and (c) varying the first steam-to-gas ratio relative to the specific gravity of the gas, including the step of conditioning the said output signal to decrease the steam-to-gas ratio when the gas to be burned is of low specific gravity, to provide a smokeless air-to-gas burning mixture in the flare with less steam usage and reduced noise.
7. A method as recited in Claim 6 wherein the last step comprises further (a) varying the amount of steam in the steam-to-gas ratio in relation to the conditioned output signal of the specific gravity analyzer.
8. A method as recited in Claim 6 wherein the last step comprises further (a) varying the amount of steam in the steam-to-gas ratio in pro-portion to the conditioned output signal of the specific gravity analyzer.
9. A method as recited in any of Claims 1, 2 or 6 wherein the specific gravity analyzer is a torque type specific gravity analyzer.
10. 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, and generating an output signal, including a circuit means for conditioning the said output signal by further modifying the said output signal in proportion to the specific gravity of the gas to be burned, (b) steam flow controller means for controlling the steam-to-gas mixture supplied to the flare, and (c) said steam flow controller means being responsive to said specific gravity analyzer means conditioned output signal 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.
11. A flare as recited in Claim 10 wherein, (a) said specific gravity analyzer means comprises means for continuously analyzing the gas prior to being supplied to the flare for burning, and (b) said circuit means comprises at least a ratio station and a high pressure select relay for conditioning and amplifying said output signal from said specific gravity analyzer.
12. A flare as recited in Claim 10 wherein the gas is supplied to the flare through a main line and wherein, (a) 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.
13. A flare as recited in Claim 10 including further, (a) ratio varying means for varying the steam-to-gas mixture output of said steam flow controller, and (b) said ratio varying means being responsive to said gas specific gravity analyzer means conditioned output signal for controlling said steam flow controller means for controlling the steam-to-gas mixture relative to the specific gravity of the gas being burned.
14. A flare as recited in Claim 10 wherein, (a) 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 (b) said steam flow controller means is responsive to said specific gravity analyzer means conditioned output signal for varying said first output by varying the steam relative to the specific gravity of the gas to be burned.
15. A flare as recited in Claim 10 wherein, (a) said steam flow controller means has a first steam output relative to the amount of gas flow to the flare, and (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.
16. A flare as recited in Claim 15 wherein, (a) 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.
17. A flare as recited in any of Claims 10, 11 or 15 wherein the specific gravity analyzer means includes a torque type specific gravity analyzer.
18. A flare as recited in Claim 15 wherein, (a) said circuit means includes steam multiplier means and relay means, and (b) said steam flow controller means is responsive to said steam multiplier means and said relay means for multiplying the steam first output by a factor relative to the specific gravity of the gas to be burned.
19. A steam aspirating gas flare for burning undesired gas having a steam flow controller comprising, (a) a main gas line connected to the flare, (b) a specific gravity analyzer connected to said main gas line having an output, and including a circuit means for conditioning said output in proportion to the specific gravity of the gas to be burned, (c) a gas flow detector connected between said main gas line and a steam flow controller having an output signal for controlling the steam flow relative to the gas flow, (d) a variable ratio controller connected between said gas flow detector and the steam flow controller, and (e) said variable ratio controller being responsive to said specific gravity analyzer conditioned output for modifying said gas flow detector control signal to said steam flow controller for ensuring smokeless burning of the undesired gas with less steam usage and reduced noise.
20. A flare as recited in Claim 19 wherein, (a) said variable ratio controller multiplies said gas flow detector output by the specific gravity analyzer conditioned output for ensuring smokeless burning of the undesired gas with less noise.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US26679472A | 1972-06-27 | 1972-06-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1080607B true CA1080607B (en) | 1980-07-01 |
Family
ID=23016020
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA174,928A Expired CA983383A (en) | 1972-06-27 | 1973-06-26 | Smokeless gas flare with specific gravity gas analyzer for reducing noise |
| CA345,188A Expired CA1080607B (en) | 1972-06-27 | 1980-02-07 | Smokeless gas flare with specific gravity gas analyzer for reducing noise |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA174,928A Expired CA983383A (en) | 1972-06-27 | 1973-06-26 | Smokeless gas flare with specific gravity gas analyzer for reducing noise |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US3771940A (en) |
| JP (1) | JPS4957425A (en) |
| BE (1) | BE801414A (en) |
| CA (2) | CA983383A (en) |
| DE (1) | DE2332077A1 (en) |
| ES (1) | ES416303A1 (en) |
| FR (1) | FR2191707A5 (en) |
| GB (1) | GB1422608A (en) |
| IT (1) | IT989468B (en) |
| NL (1) | NL7308831A (en) |
Families Citing this family (11)
| 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 |
| 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 |
| US7811081B2 (en) * | 2008-04-18 | 2010-10-12 | Moneyhun Equipment Sales & Service | Off-gas flare |
| US9677762B2 (en) | 2010-02-09 | 2017-06-13 | Phillips 66 Company | Automated flare control |
| US8629313B2 (en) * | 2010-07-15 | 2014-01-14 | John Zink Company, Llc | Hybrid flare apparatus and method |
Family Cites Families (4)
| 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 |
| JPS4926534A (en) * | 1972-07-05 | 1974-03-09 |
-
1972
- 1972-06-27 US US00266794A patent/US3771940A/en not_active Ceased
-
1973
- 1973-06-14 GB GB2831873A patent/GB1422608A/en not_active Expired
- 1973-06-22 JP JP48069919A patent/JPS4957425A/ja active Pending
- 1973-06-23 DE DE2332077A patent/DE2332077A1/en active Pending
- 1973-06-25 BE BE132700A patent/BE801414A/en unknown
- 1973-06-26 CA CA174,928A patent/CA983383A/en not_active Expired
- 1973-06-26 NL NL7308831A patent/NL7308831A/xx not_active Application Discontinuation
- 1973-06-26 IT IT25835/73A patent/IT989468B/en active
- 1973-06-27 FR FR7323485A patent/FR2191707A5/fr not_active Expired
- 1973-07-26 ES ES416303A patent/ES416303A1/en not_active Expired
-
1980
- 1980-02-07 CA CA345,188A patent/CA1080607B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE801414A (en) | 1973-12-26 |
| DE2332077A1 (en) | 1974-01-03 |
| AU5720673A (en) | 1975-01-09 |
| GB1422608A (en) | 1976-01-28 |
| IT989468B (en) | 1975-05-20 |
| FR2191707A5 (en) | 1974-02-01 |
| JPS4957425A (en) | 1974-06-04 |
| NL7308831A (en) | 1974-01-02 |
| ES416303A1 (en) | 1976-06-01 |
| CA983383A (en) | 1976-02-10 |
| US3771940A (en) | 1973-11-13 |
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| MKEX | Expiry |