CA2651619A1 - Fuel line antifreeze system - Google Patents
Fuel line antifreeze system Download PDFInfo
- Publication number
- CA2651619A1 CA2651619A1 CA 2651619 CA2651619A CA2651619A1 CA 2651619 A1 CA2651619 A1 CA 2651619A1 CA 2651619 CA2651619 CA 2651619 CA 2651619 A CA2651619 A CA 2651619A CA 2651619 A1 CA2651619 A1 CA 2651619A1
- Authority
- CA
- Canada
- Prior art keywords
- line
- tank
- control valve
- under pressure
- gas under
- 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.)
- Abandoned
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
- F17D1/04—Pipe-line systems for gases or vapours for distribution of gas
- F17D1/05—Preventing freezing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/12—Arrangements for supervising or controlling working operations for injecting a composition into the line
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Feeding And Controlling Fuel (AREA)
Abstract
An injection system injects methanol into a fuel line such as a pressurized gas fuel line for providing fuel to an oilfield burner. A three way line connector connects the system to an existing line of gas under pressure. The system comprises a methanol tank which communicates with the line connector through a control valve comprises a needle valve which permits a steady drip of methanol to be fed into the pressurized gas fuel line. An equalizing line is connected between the line of gas under pressure and the tank for equalizing pressure therebetween.
Description
FUEL LINE ANTIFREEZE SYSTEM
FIELD OF THE INVENTION
The present invention relates to a system for introducing an antifreeze chemical, for example methanol, into a gas line under pressure, typically in an oilfield application or an industrial application, for example a pressurized gas line for providing fuel to an oilfield burner or a heater, or a pressurized gas line in any other oilfield or industrial applications, etc.
BACKGROUND
In various oilfield applications it is known to communicate a fuel or gas line to a burner or heater to maintain operation and fluidity of various components in cold climates. In some instances the fuel lines are known to freeze so that the heat source being supplied with fuel no longer functions. This can lead to greater problems including damage to equipment or loss of fluidity of oil to be handled. When fuel lines are frozen, it is common to inject a large batch methanol to clear ice in the lines, however this batch injection of methanol results in a large waste of chemical potentially being released into the environment.
US patent 6,981,848 by Cessac discloses an example of a methanol injection system to prevent freezing of a natural gas pipeline. The system is suited for injecting methanol in small amounts periodically into a pipeline; however, the system requires a complex and costly arrangement of a pump, a timer and a controller which further results in high maintenance costs.
SUMMARY OF THE INVENTION
According to one aspect of the present invention there is provided a system for introducing fluid chemicals into a line of gas under pressure, the system comprising:
FIELD OF THE INVENTION
The present invention relates to a system for introducing an antifreeze chemical, for example methanol, into a gas line under pressure, typically in an oilfield application or an industrial application, for example a pressurized gas line for providing fuel to an oilfield burner or a heater, or a pressurized gas line in any other oilfield or industrial applications, etc.
BACKGROUND
In various oilfield applications it is known to communicate a fuel or gas line to a burner or heater to maintain operation and fluidity of various components in cold climates. In some instances the fuel lines are known to freeze so that the heat source being supplied with fuel no longer functions. This can lead to greater problems including damage to equipment or loss of fluidity of oil to be handled. When fuel lines are frozen, it is common to inject a large batch methanol to clear ice in the lines, however this batch injection of methanol results in a large waste of chemical potentially being released into the environment.
US patent 6,981,848 by Cessac discloses an example of a methanol injection system to prevent freezing of a natural gas pipeline. The system is suited for injecting methanol in small amounts periodically into a pipeline; however, the system requires a complex and costly arrangement of a pump, a timer and a controller which further results in high maintenance costs.
SUMMARY OF THE INVENTION
According to one aspect of the present invention there is provided a system for introducing fluid chemicals into a line of gas under pressure, the system comprising:
a tank for receiving a chemical therein, the tank comprising an inlet port adjacent a top end and an outlet port adjacent a bottom end thereof;
a line connector arranged for connection with the line of gas under pressure;
a control valve coupled in communication between the outlet port of the tank and the line connector, the control valve being arranged to control a flow rate of chemical therethrough from tank to the line of gas under pressure; and an equalizing line arranged for connection between the line of gas under pressure at a first end of the line and the tank at a second end of the line so as to be arranged to equalize pressure between the line of gas under pressure and the tank.
By providing a tank in communication with a control valve and an equalizing line, a simple low cost construction results which requires minimal maintenance and which maintains a constant preventative flow of methanol or other antifreeze chemical to be injected into a fuel line. The constant injection of chemical results in the chemical being consumed by heating equipment which consumes the gaseous fuel into which the chemical is injected to prevent methanol being released into the environment and to ensure that the fuel line does not freeze and that the heating equipment continues to operate to prevent any further problems.
By preventing burner flame outs due to wet or frozen fuel gas supplies, temperature of the heating equipment can be maintained. When the heating equipment is used to heat an oil storage tank, the tank temperature can be maintained to decrease trucking costs due to cold fluid and to minimize tank treating operations. The system further minimizes operator time in maintaining burners due to the virtually zero maintenance required of the system. The system further prevents failure of burner controls including regulators and temperature controllers and the like due to the continued operation of the fuel supply lines. As a result of the injection system described herein, users are no longer required to flood burner piping with methanol when freeze off occurs as freezing is prevented. The system can be readily installed onto existing heating equipment and burner systems at a fraction of the cost of a chemical pumps or spheres.
There may be provided a shut-off valve in communication between the control valve and the line connector.
The first end of the equalizing line may be in communication with a three way connector in series between the control valve and the shut-off valve.
The control valve may comprise an orifice of suitable dimension that the chemical is arranged to drip therefrom into the line connector.
The control valve may be adjustable such that a flow rate of chemical injection into the line of gas under pressure is adjustable.
The control valve may include a housing having a transparent portion such that a flow of chemical from an outlet of the control valve is externally visible.
The tank may be elongate in an upright direction between the inlet port and the outlet portion.
Preferably the tank tapers downwardly and inwardly adjacent the bottom end towards the outlet port. The inlet port may be centrally located in the top end of the tank opposite the outlet port.
There may be provided a fill port above the top end of the tank and a shut-off valve in series between the fill port and the inlet port of the tank.
There may also be provided a three way connector in communication between the shut-off valve, the inlet port of the tank and the first end of the equalizing line.
a line connector arranged for connection with the line of gas under pressure;
a control valve coupled in communication between the outlet port of the tank and the line connector, the control valve being arranged to control a flow rate of chemical therethrough from tank to the line of gas under pressure; and an equalizing line arranged for connection between the line of gas under pressure at a first end of the line and the tank at a second end of the line so as to be arranged to equalize pressure between the line of gas under pressure and the tank.
By providing a tank in communication with a control valve and an equalizing line, a simple low cost construction results which requires minimal maintenance and which maintains a constant preventative flow of methanol or other antifreeze chemical to be injected into a fuel line. The constant injection of chemical results in the chemical being consumed by heating equipment which consumes the gaseous fuel into which the chemical is injected to prevent methanol being released into the environment and to ensure that the fuel line does not freeze and that the heating equipment continues to operate to prevent any further problems.
By preventing burner flame outs due to wet or frozen fuel gas supplies, temperature of the heating equipment can be maintained. When the heating equipment is used to heat an oil storage tank, the tank temperature can be maintained to decrease trucking costs due to cold fluid and to minimize tank treating operations. The system further minimizes operator time in maintaining burners due to the virtually zero maintenance required of the system. The system further prevents failure of burner controls including regulators and temperature controllers and the like due to the continued operation of the fuel supply lines. As a result of the injection system described herein, users are no longer required to flood burner piping with methanol when freeze off occurs as freezing is prevented. The system can be readily installed onto existing heating equipment and burner systems at a fraction of the cost of a chemical pumps or spheres.
There may be provided a shut-off valve in communication between the control valve and the line connector.
The first end of the equalizing line may be in communication with a three way connector in series between the control valve and the shut-off valve.
The control valve may comprise an orifice of suitable dimension that the chemical is arranged to drip therefrom into the line connector.
The control valve may be adjustable such that a flow rate of chemical injection into the line of gas under pressure is adjustable.
The control valve may include a housing having a transparent portion such that a flow of chemical from an outlet of the control valve is externally visible.
The tank may be elongate in an upright direction between the inlet port and the outlet portion.
Preferably the tank tapers downwardly and inwardly adjacent the bottom end towards the outlet port. The inlet port may be centrally located in the top end of the tank opposite the outlet port.
There may be provided a fill port above the top end of the tank and a shut-off valve in series between the fill port and the inlet port of the tank.
There may also be provided a three way connector in communication between the shut-off valve, the inlet port of the tank and the first end of the equalizing line.
There may be provided a funnel member in communication with the fill port. Preferably a plug member is arranged to be threadably received within a mouth opening of the funnel member.
There may further be provided a sight glass comprising an elongate transparent tube supported externally alongside the tank in communication between the top end and bottom end of the tank.
The system may be operated in combination with an oilfield heater in which the line connector is coupled in series with a line of gas under pressure arranged to supply fuel to the oilfield heater.
Alternatively, the system may be operated in combination with an oil tank burner arranged to heat an oil holding tank in which the line connector is coupled in series with a line of gas under pressure arranged to supply fuel to the oil tank burner.
One embodiment of the invention will now be described in conjunction with the accompanying drawings in which:
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a schematic representation of the installation of the injection system according to one exemplary embodiment.
Figure 2 is an elevational view of the injection system.
In the drawings like characters of reference indicate corresponding parts in the different figures.
DETAILED DESCRIPTION
Referring to the accompanying figures there is illustrated a fuel gas line antifreeze injection system generally indicated by reference numeral 10. The system 10 is particularly useful with a gaseous pipeline, for example natural gas, which is supplied to oilfield heating equipment including heaters within a wellhead housing, or a burner for maintaining heat in a production tank, for example storage tanks of the type which may store 750 barrels and the like.
In the illustrated embodiment, a branched fuel line 12 is drawn from a 5 gaseous pipeline to a vertical pipe run 14 which directs the branched line to a level of the burner. The branched fuel line 12 communicates through a primary pressure regulator 16 which in turn communicates through a burner control element 18 to an adjustable control valve 20 which supplies fuel to a main burner 22 of the heating equipment responsive to a temperature controller 24. A secondary branched line branches off of the main line between the burner control element 18 and the control valve 20 to redirect a flow of gas to a secondary regulator 28 which in turn supplies the fuel to a pilot burner 30. The system 10 is arranged for injecting methanol into the branched fuel line 12 between the vertical pipe run 14 and the pressure regulator 16.
The system 10 comprises a tank 32 which is generally cylindrical and elongate in an upright direction between an inlet 34 at a top end and outlet port 36 at a bottom end. The bottom end of the tank is generally spherical in shape so that the cylindrical walls taper downwardly and inwardly to the centrally located outlet port 36.
The inlet end of the tank is similarly domed in shaped to taper upwardly and inwardly towards the centrally located inlet port 34. The tank 32 is arranged for containing methanol therein under pressure.
A sight glass 38 is provided in the form of an external transparent tube which extends parallel to and alongside the tank 32 in a vertical orientation.
A top end of the sight glass communicates through a side wall of the tank adjacent the top end thereof while a bottom end of the sight glass 38 communicates through the side wall of the tank 32 adjacent the bottom end thereof such that a level of methanol within the sight glass is maintained equal to the level of methanol within the tank.
The outlet port 36 of the tank communicates with a control valve 40 which comprises a needle valve having a small orifice and which is adjustable to adjust a flow rate of methanol therethrough from the tank to the branched line 12. The control valve 40 comprises a tubular housing having a sight glass portion 42 comprising a transparent window formed in the wall of the housing alignment with an outlet of the orifice of the control valve 40 for permitting visual monitoring of the flow rate of methanol exiting from the control valve 40 towards the branched line 12.
A first T-connector 44 or three-way connector is arranged to connect the components of the system 10 to the branched line 12 which is directed through the connector 44. A shutoff valve 46 is connected in series between the components of the system 10. and the T-connector 44 such that closing the shutoff valve closes communication of the system 10 with the branched line while permitting the branched line to maintain a flow therethrough through the primary T-connector 44.
A second T-connector 48 is provided for connection between the outlet of the control valve 40, the shutoff valve 46, and an equalizing line 50. The equalizing line 50 is in communication between a bottom end 52 arranged to communicate with the branched line pressure at a line which communicates between the outlet of the control valve and the shutoff valve 46 and a top end 54 which is in communication with the top end of the tank. In this manner the equalizing line ensures that when the shutoff valve is open, pressure from the branched line is communicated through the equalizing line to the top of the tank to balance pressure and equalize pressure of the tank with that of the branched line.
At the top of the tank there is provided a third T-connector 56 which communicates between the inlet port at the top end of the tank, the top end of the equalizing line, and an access valve 58 above the tank. The access valve 58 comprises a shutoff valve in series between the third T-connector 56 and a fill port 60 which permits filling of the tank with methanol therethrough. The fill port 60 communicates with the bottom outlet of a funnel 62 which is vertical in orientation between the large mouth opening 64 at the top end and the outlet thereof at the bottom end which communicates with the fill port of the third T-connector 56.
The mouth 64 is suitably arranged for threadably receiving a sealing plug 66 therein to selectively seal the funnel and access through the fill port to the tank.
When it is desired to fill the tank, the shutoff valve 46 in communication between the system 10 and the branched line is closed which isolates both the tank and the equalizing line from the pressure of the branched line 12. Removing the plug 66 from the funnel 62 and opening the access valve 58 permits methanol to be dispensed into the tank through the funnel. The level of methanol in the tank is monitored through the sight glass 38 alongside the tank. Once full, the access valve 58 is closed and the plug 66 is replaced at the mouth of the funnel to prevent debris entering the system 10.
Under normal operating conditions, the access valve 58 remains closed and the shutoff valve 46 is opened so that the tank and equalizing line communicate with the branched line 12 through the open shutoff valve 46. The control valve 40 is operated so that a desired flow rate drips from the orifice outlet of the valve into the auxiliary line which communicates with the branched line through the shutoff valve 46.
The pressure within the branched line 12 is communicated back through the shutoff valve 46 and upwardly through the equalizing line to the top end of the tank.
In this manner the pressure in the tank is balanced with the line pressure and pressure on both inlet and outlet sides of the control valve are balanced. In this manner the varying pressure in the branched line 12 has no effect on the flow rate prescribed by the control valve.
The system 10 is designed to deliver liquid chemical into a pressurized or non-pressurized system without any energy source such as electricity or mechanical motors. The system 10 is a gravity driven chemical injection system that consists of: i) a needle valve and sight glass assembly that controls the flow rate of chemical and is observed through the sight glass; and ii) an equalizing tubing line that allows the liquid to gravity feed into a pressurized system by allowing gas pressure equalization from the system back to the top of the liquid.
The needle valve/sight glass assembly is fitted with a screen to prevent any solid debris from plugging the needle valve. The outlet hole in the valve/sight glass assembly is drilled out to 0.25 inches to prevent any liquid build up inside the valve from inhibiting chemical flow.
Major components of the system 10 include: i) a filling assembly comprising a 2 inch diameter pipe reducer including a strainer and plug; ii) a filling /
isolation valve on top of the tank; iii) a pipe tee to connect the equalizing tubing to the top of the tank; iv) a tank which comprises a welded pressure vessel having four connections including two for the chemical sight glass, one for top filling/equalizing connection and one on the bottom that the needle valve/sight glass assembly is fined;
v) a needle valve and sight glass assembly; and vi) a pipe tee which connects the shut off valve to the needle valve sight /glass assembly and to the equalizing tubing.
Since various modifications can be made in my invention as herein above described, and many apparently widely different embodiments of same made within the spirit and scope of the claims without department from such spirit and scope, it is intended that all matter contained in the accompanying specification shall be interpreted as illustrative only and not in a limiting sense.
There may further be provided a sight glass comprising an elongate transparent tube supported externally alongside the tank in communication between the top end and bottom end of the tank.
The system may be operated in combination with an oilfield heater in which the line connector is coupled in series with a line of gas under pressure arranged to supply fuel to the oilfield heater.
Alternatively, the system may be operated in combination with an oil tank burner arranged to heat an oil holding tank in which the line connector is coupled in series with a line of gas under pressure arranged to supply fuel to the oil tank burner.
One embodiment of the invention will now be described in conjunction with the accompanying drawings in which:
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a schematic representation of the installation of the injection system according to one exemplary embodiment.
Figure 2 is an elevational view of the injection system.
In the drawings like characters of reference indicate corresponding parts in the different figures.
DETAILED DESCRIPTION
Referring to the accompanying figures there is illustrated a fuel gas line antifreeze injection system generally indicated by reference numeral 10. The system 10 is particularly useful with a gaseous pipeline, for example natural gas, which is supplied to oilfield heating equipment including heaters within a wellhead housing, or a burner for maintaining heat in a production tank, for example storage tanks of the type which may store 750 barrels and the like.
In the illustrated embodiment, a branched fuel line 12 is drawn from a 5 gaseous pipeline to a vertical pipe run 14 which directs the branched line to a level of the burner. The branched fuel line 12 communicates through a primary pressure regulator 16 which in turn communicates through a burner control element 18 to an adjustable control valve 20 which supplies fuel to a main burner 22 of the heating equipment responsive to a temperature controller 24. A secondary branched line branches off of the main line between the burner control element 18 and the control valve 20 to redirect a flow of gas to a secondary regulator 28 which in turn supplies the fuel to a pilot burner 30. The system 10 is arranged for injecting methanol into the branched fuel line 12 between the vertical pipe run 14 and the pressure regulator 16.
The system 10 comprises a tank 32 which is generally cylindrical and elongate in an upright direction between an inlet 34 at a top end and outlet port 36 at a bottom end. The bottom end of the tank is generally spherical in shape so that the cylindrical walls taper downwardly and inwardly to the centrally located outlet port 36.
The inlet end of the tank is similarly domed in shaped to taper upwardly and inwardly towards the centrally located inlet port 34. The tank 32 is arranged for containing methanol therein under pressure.
A sight glass 38 is provided in the form of an external transparent tube which extends parallel to and alongside the tank 32 in a vertical orientation.
A top end of the sight glass communicates through a side wall of the tank adjacent the top end thereof while a bottom end of the sight glass 38 communicates through the side wall of the tank 32 adjacent the bottom end thereof such that a level of methanol within the sight glass is maintained equal to the level of methanol within the tank.
The outlet port 36 of the tank communicates with a control valve 40 which comprises a needle valve having a small orifice and which is adjustable to adjust a flow rate of methanol therethrough from the tank to the branched line 12. The control valve 40 comprises a tubular housing having a sight glass portion 42 comprising a transparent window formed in the wall of the housing alignment with an outlet of the orifice of the control valve 40 for permitting visual monitoring of the flow rate of methanol exiting from the control valve 40 towards the branched line 12.
A first T-connector 44 or three-way connector is arranged to connect the components of the system 10 to the branched line 12 which is directed through the connector 44. A shutoff valve 46 is connected in series between the components of the system 10. and the T-connector 44 such that closing the shutoff valve closes communication of the system 10 with the branched line while permitting the branched line to maintain a flow therethrough through the primary T-connector 44.
A second T-connector 48 is provided for connection between the outlet of the control valve 40, the shutoff valve 46, and an equalizing line 50. The equalizing line 50 is in communication between a bottom end 52 arranged to communicate with the branched line pressure at a line which communicates between the outlet of the control valve and the shutoff valve 46 and a top end 54 which is in communication with the top end of the tank. In this manner the equalizing line ensures that when the shutoff valve is open, pressure from the branched line is communicated through the equalizing line to the top of the tank to balance pressure and equalize pressure of the tank with that of the branched line.
At the top of the tank there is provided a third T-connector 56 which communicates between the inlet port at the top end of the tank, the top end of the equalizing line, and an access valve 58 above the tank. The access valve 58 comprises a shutoff valve in series between the third T-connector 56 and a fill port 60 which permits filling of the tank with methanol therethrough. The fill port 60 communicates with the bottom outlet of a funnel 62 which is vertical in orientation between the large mouth opening 64 at the top end and the outlet thereof at the bottom end which communicates with the fill port of the third T-connector 56.
The mouth 64 is suitably arranged for threadably receiving a sealing plug 66 therein to selectively seal the funnel and access through the fill port to the tank.
When it is desired to fill the tank, the shutoff valve 46 in communication between the system 10 and the branched line is closed which isolates both the tank and the equalizing line from the pressure of the branched line 12. Removing the plug 66 from the funnel 62 and opening the access valve 58 permits methanol to be dispensed into the tank through the funnel. The level of methanol in the tank is monitored through the sight glass 38 alongside the tank. Once full, the access valve 58 is closed and the plug 66 is replaced at the mouth of the funnel to prevent debris entering the system 10.
Under normal operating conditions, the access valve 58 remains closed and the shutoff valve 46 is opened so that the tank and equalizing line communicate with the branched line 12 through the open shutoff valve 46. The control valve 40 is operated so that a desired flow rate drips from the orifice outlet of the valve into the auxiliary line which communicates with the branched line through the shutoff valve 46.
The pressure within the branched line 12 is communicated back through the shutoff valve 46 and upwardly through the equalizing line to the top end of the tank.
In this manner the pressure in the tank is balanced with the line pressure and pressure on both inlet and outlet sides of the control valve are balanced. In this manner the varying pressure in the branched line 12 has no effect on the flow rate prescribed by the control valve.
The system 10 is designed to deliver liquid chemical into a pressurized or non-pressurized system without any energy source such as electricity or mechanical motors. The system 10 is a gravity driven chemical injection system that consists of: i) a needle valve and sight glass assembly that controls the flow rate of chemical and is observed through the sight glass; and ii) an equalizing tubing line that allows the liquid to gravity feed into a pressurized system by allowing gas pressure equalization from the system back to the top of the liquid.
The needle valve/sight glass assembly is fitted with a screen to prevent any solid debris from plugging the needle valve. The outlet hole in the valve/sight glass assembly is drilled out to 0.25 inches to prevent any liquid build up inside the valve from inhibiting chemical flow.
Major components of the system 10 include: i) a filling assembly comprising a 2 inch diameter pipe reducer including a strainer and plug; ii) a filling /
isolation valve on top of the tank; iii) a pipe tee to connect the equalizing tubing to the top of the tank; iv) a tank which comprises a welded pressure vessel having four connections including two for the chemical sight glass, one for top filling/equalizing connection and one on the bottom that the needle valve/sight glass assembly is fined;
v) a needle valve and sight glass assembly; and vi) a pipe tee which connects the shut off valve to the needle valve sight /glass assembly and to the equalizing tubing.
Since various modifications can be made in my invention as herein above described, and many apparently widely different embodiments of same made within the spirit and scope of the claims without department from such spirit and scope, it is intended that all matter contained in the accompanying specification shall be interpreted as illustrative only and not in a limiting sense.
Claims (16)
1. A system for introducing fluid chemicals into a line of gas under pressure, the system comprising:
a tank for receiving a chemical therein, the tank comprising an inlet port adjacent a top end and an outlet port adjacent a bottom end thereof;
a line connector arranged for connection with the line of gas under pressure;
a control valve coupled in communication between the outlet port of the tank and the line connector, the control valve being arranged to control a flow rate of chemical therethrough from tank to the line of gas under pressure; and an equalizing line arranged for connection between the line of gas under pressure at a first end of the equalizing line and the tank at a second end of the equalizing line so as to be arranged to equalize pressure between the line of gas under pressure and the tank.
a tank for receiving a chemical therein, the tank comprising an inlet port adjacent a top end and an outlet port adjacent a bottom end thereof;
a line connector arranged for connection with the line of gas under pressure;
a control valve coupled in communication between the outlet port of the tank and the line connector, the control valve being arranged to control a flow rate of chemical therethrough from tank to the line of gas under pressure; and an equalizing line arranged for connection between the line of gas under pressure at a first end of the equalizing line and the tank at a second end of the equalizing line so as to be arranged to equalize pressure between the line of gas under pressure and the tank.
2. The system according to Claim 1 wherein there is provided a shut-off valve in communication between the control valve and the line connector.
3. The system according to Claim 2 wherein the first end of the equalizing line is in communication with a three way connector in series between the control valve and the shut-off valve.
4. The system according to any one of Claims 1 through 3 wherein the control valve comprises an orifice of suitable dimension that the chemical is arranged to drip therefrom into the line connector.
5. The system according to Claim 4 wherein the control valve is adjustable such that a flow rate of chemical injection into the line of gas under pressure is adjustable.
6. The system according to Claim 4 wherein the control valve includes a housing having a transparent portion such that a flow of chemical from an outlet of the control valve is externally visible.
7. The system according to any one of Claims 1 through 6 wherein the tank is elongate in an upright direction between the inlet port and the outlet portion.
8. The system according to Claim 7 wherein the tank tapers downwardly and inwardly adjacent the bottom end towards the outlet port.
9. The system according to Claim 8 wherein the inlet port is centrally located in the top end of the tank opposite the outlet port.
10. The system according to any one of Claims 1 through 9 wherein there is provided a fill port above the top end of the tank and a shut-off valve in series between the fill port and the inlet port of the tank.
11. The system according to Claim 10 wherein there is provided a three way connector in communication between the shut-off valve, the inlet port of the tank and the first end of the equalizing line.
12. The system according to Claim 10 wherein there is provided a funnel member in communication with the fill port.
13. The system according to Claim 12 wherein there is provided a plug member threadably received within a mouth opening of the funnel member.
14. The system according to any one of Claims 1 through 13 wherein there is provided a sight glass comprising an elongate transparent tube supported externally alongside the tank in communication between the top end and bottom end of the tank.
15. The system according to any one of Claims 1 through 14 in combination with an oilfield heater in which the line connector is coupled in series with a line of gas under pressure arranged to supply fuel to the oilfield heater.
16. The system according to any one of Claims 1 through 14 in combination with an oil tank burner arranged to heat an oil holding tank in which the line connector is coupled in series with a line of gas under pressure arranged to supply fuel to the oil tank burner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2651619 CA2651619A1 (en) | 2009-01-22 | 2009-01-22 | Fuel line antifreeze system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2651619 CA2651619A1 (en) | 2009-01-22 | 2009-01-22 | Fuel line antifreeze system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2651619A1 true CA2651619A1 (en) | 2010-07-22 |
Family
ID=42352546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2651619 Abandoned CA2651619A1 (en) | 2009-01-22 | 2009-01-22 | Fuel line antifreeze system |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2651619A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108894762A (en) * | 2018-08-30 | 2018-11-27 | 西安长庆科技工程有限责任公司 | A kind of gas well well site note alcohol device and its application method |
| WO2019167276A1 (en) * | 2018-03-02 | 2019-09-06 | 三菱日立パワーシステムズ株式会社 | Fuel gas storage system for gas turbine and method for supplying fuel gas to gas turbine |
| CN114542989A (en) * | 2022-03-16 | 2022-05-27 | 西南石油大学 | Natural gas supplementing and odorizing method and miniature odorizing device thereof |
-
2009
- 2009-01-22 CA CA 2651619 patent/CA2651619A1/en not_active Abandoned
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019167276A1 (en) * | 2018-03-02 | 2019-09-06 | 三菱日立パワーシステムズ株式会社 | Fuel gas storage system for gas turbine and method for supplying fuel gas to gas turbine |
| CN108894762A (en) * | 2018-08-30 | 2018-11-27 | 西安长庆科技工程有限责任公司 | A kind of gas well well site note alcohol device and its application method |
| CN114542989A (en) * | 2022-03-16 | 2022-05-27 | 西南石油大学 | Natural gas supplementing and odorizing method and miniature odorizing device thereof |
| CN114542989B (en) * | 2022-03-16 | 2023-11-28 | 西南石油大学 | Natural gas supplementary odorizing method and micro odorizing device thereof |
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Effective date: 20140122 |