CA2285811A1 - Air assisted combustion of waste gas - Google Patents
Air assisted combustion of waste gas Download PDFInfo
- Publication number
- CA2285811A1 CA2285811A1 CA 2285811 CA2285811A CA2285811A1 CA 2285811 A1 CA2285811 A1 CA 2285811A1 CA 2285811 CA2285811 CA 2285811 CA 2285811 A CA2285811 A CA 2285811A CA 2285811 A1 CA2285811 A1 CA 2285811A1
- Authority
- CA
- Canada
- Prior art keywords
- waste gas
- tube
- blower
- stack
- discharge end
- 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
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
- F23G7/08—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases using flares, e.g. in stacks
- F23G7/085—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases using flares, e.g. in stacks in stacks
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Incineration Of Waste (AREA)
Abstract
A flare stack is provided for combusting waste gas. The flare stack includes a main stack tube connected at a bottom end to a source of the waste gas.
The main stack tube includes a discharge at a top end of the stack tube for directing the flow of waste gas through the main stack tube to the discharge. A blower is provided for directing a flow of combustion air into the flow waste gas adjacent the discharge of the stack tube. A blower contrl senses the pressure of the waste gas adjacent the source for driving the blower at a speed which increases with an increase in the pressure of the waste gas. In this arrangement the supply of combustion air remains generally proportional to the flow of waste gas for ensuring complete combustion of the waste gas. A hood is mounted on the discharge of the main stack tube.
The main stack tube includes a discharge at a top end of the stack tube for directing the flow of waste gas through the main stack tube to the discharge. A blower is provided for directing a flow of combustion air into the flow waste gas adjacent the discharge of the stack tube. A blower contrl senses the pressure of the waste gas adjacent the source for driving the blower at a speed which increases with an increase in the pressure of the waste gas. In this arrangement the supply of combustion air remains generally proportional to the flow of waste gas for ensuring complete combustion of the waste gas. A hood is mounted on the discharge of the main stack tube.
Description
AIR ASSISTED COMBUSTION OF WASTE GAS
FIELD OF THE INVENTION
This invention relates to a flare stack and more particularly to air assisted combustion of flare stack gases.
BACKGROUND
In the field of gas and oil production, it is common practice to use a stack for emitting waste gases up into the atmosphere. The use of a burner on the stack is known for combusting some of the unburned hydrocarbons and sulphurous oxides for reducing harmful gas emissions into the atmosphere. Known flare stacks however are not able to adequately burn waste gases resulting in a significant environmental problem as products of an incomplete combustion are permitted to escape into the atmosphere.
The present invention is concerned with certain improvements to the combustion of waste gases in flare stacks.
SUMMARY
According to the present invention there is provided a flare stack for combusting waste gas, the flare stack comprising;
a main stack tube having an inlet adjacent a bottom end for connection to a source of the waste gas, the main stack tube extending upward to a discharge end for directing a flow of the waste gas therethrough;
blower means for directing a flow of combustion air into the flow of waste gas adjacent the discharge end of the main stack tube;
sensing means for sensing a condition of the waste gas and for producing a blower signal representing the condition of the waste gas; and blower control means for receiving the blower signal from the sensing means and for controlling the blower means according to the blower signal received from the sensing means.
The use of a blower control ensures that a sufficient amount of combustion air is being supplied to the discharge end of the main stack tube relative to the amount of waste gas such that the waste gas can be completely combusted before the waste gas is discharged from the flare stack. Increasing the amount of combustion air permits the combustion temperature to be elevated for combusting the waste gas more effectively.
The blower control means preferably comprises a variable speed motor for driving the blower means at variable speeds corresponding to variations of the blower signal.
The sensed condition of the waste gas preferably comprises the pressure of the waste gas and the blower signal accordingly represents a magnitude of the pressure such that the speed of the blower increases with an increase in the pressure of the waste gas. The use of a flow meter or other type of sensing equipment is also suitable for supplying a suitable ratio of combustion air to waste gas for complete combustion of the waste gas.
There may be provided a hood mounted on the discharge end of the main stack tube, the hood comprising a tubular member having an open bottom end mounted on the discharge end of the stack tube and an open top end spaced upwardly from the discharge end, the top end having a smaller diameter than the bottom end.
The bottom end of the hood preferably has a greater diameter than the main stack tube defining an annular space therebetween such that additional combustion air is drawn past the discharge end of the main stack tube through the annular space.
Preferably there is provided a settling chamber connected to the source of waste gas and mounting the main stack tube thereon. The settling chamber preferably includes an inlet for connecting to the source of waste gas and an outlet for connecting to the main stack tube, the outlet having a smaller diameter than the inlet.
There may be provided an air tube connecting an outlet of the blower means to the discharge end of the main stack tube, the air tube preferably extending at an upward incline adjacent the discharge end of the main stack tube such that the flow of combustion air is directed upward into the flow of waste gas as the combustion air passes from the air tube into the main stack tube.
An ignitor is preferably mounted within the main stack tube adjacent the discharge end. When mounting the ignitor in the main stack tube, the ignitor preferably comprises a supply line of combustible fuel having a continuous electronic ignition mounted on an end thereof.
BRIEF DESCRIPTION OF THE DRAWINGS
In the accompanying drawings, which illustrate an exemplary embodiment of the present invention:
Figure 1 is a side elevational view of the flare stack.
Figure 2 is a cross sectional view of a bottom end of the stack.
Figure 3 is a cross sectional view of a discharge end of the stack.
DETAILED DESCRIPTION
Referring to the accompanying drawings, there is illustrated a flare stack generally indicated by reference numeral 10. The flare stack 10 provides air assisted combustion of waste gases to reduce the emission of waste gases which have not been sufficiently combusted and are harmful to the environment.
The flare stack 10 is supported on a concrete foundation 12 and includes a settling chamber 14 mounted on the foundation. The settling chamber is defined within a cylindrical member 16. The cylindrical member 16 is sealed at a bottom end by a plate 18 and sealed at a top end by cap 20.
An inlet pipe 22 is mounted through a side wall 24 of the cylindrical member 16 towards a top end 26 of the settling chamber. The inlet pipe connects to a pipeline of waste gas to be combusted in the flare stack. The inlet pipe directs the gas down into the settling chamber such that solid or liquid particles in the waste gas flow are able to settle out of the gas in the settling chamber before the gas is passed further along. The settling chamber also serves to regulate the pressure of the gas entering the flare stack, as the inlet pressure tends to fluctuate.
An outlet 28 is mounted in the cap 20 at the top end 26 of the settling chamber. The outlet 28 has a diameter which is smaller than the inlet pipe 22 for constricting the flow of gas through the outlet. The outlet 28 is located at the top end such that the gas which is removed from the settling chamber is adjacent the top end where the gas has had a chance to let the solid and liquid particles settle.
A main stack tube 30 is mounted on the outlet 28. The main stack tube 30 is an elongate cylindrical tube which extends vertically upward and has a diameter which is substantially equal to the outlet 28. The main stack tube 30 allows the waste gas to exit the settling chamber through the outlet and pass through the tube to a discharge end 32 at a top end of the stack tube. The gas is then discharged through the discharge end 32 as it is combusted.
A coupling element 34 is mounted on the discharge end of the main stack tube for directing a flow of combustion air into the stream of waste gas exiting the discharge end stack tube. The coupling element 34 includes a main tube portion 36 in alignment with the main stack tube and a secondary tube portion 38 which is coupled to the main tube portion. The secondary tube portion 38 extends at an upward incline as it merges with the main tube portion for directing the flow of combustion air therethrough for mixing with the waste gas exiting the discharge end of the main stack tube. An outlet 39 at a top end of the coupling element allows the gas to be discharged therefrom as it is combusted.
A blower 40 is mounted adjacent the cylindrical member 16 for generating the flow of combustion air. The blower 40 has an outlet 42 which is directed upward and connected to a combustion air tube 44. The air tube 44 extends alongside the main stack tube and communicates with the secondary tube portion of the coupling element at a top end of the air tube. The air tube and blower are supported on the main stack tube by brackets 46. The blower 40 is an explosion proof type blower.
The blower 40 includes a variable frequency drive 48 for driving the blower. The variable frequency drive 48 is arranged to send an electrical speed signal to the blower corresponding to a given blower speed within a range of blower speeds for adjusting the rate of the flow of combustion air.
The variable frequency drive 48 is controlled by a transmitter 50 mounted in the settling chamber adjacent the inlet pipe 22. The transmitter 50 includes a sensor for measuring the line pressure and translates that pressure into an electrical pressure signal. The transmitter 50 transmits the pressure signal to the variable frequency drive 48 which then transmits an appropriate speed signal to the blower such that the blower speed increases in proportion with the line pressure sensed by the transmitter.
In this arrangement, the ratio of combustion air to waste gas being emitted from the flare stack is controlled and optimised for complete combustion of the waste gas. The transmitter continuously monitors the line pressure such that the blower continuously runs at a desired speed for effective combustion of the waste gas.
An ignitor 52 is located adjacent the coupling element for igniting the waste gas with the combustion air as the gas passes through the coupling element.
The ignitor includes a supply line 54 mounted alongside the main stack tube with brackets for supplying a small quantity of combustible gas to ignite the waste gas.
The supply line 54 extends generally upward and terminates at an end 56 adjacent the outlet at a top end of the coupling element. A secondary line 58 of the supply line is connected to the supply line adjacent the end 56 and extends at a downward incline into the primary tube portion of the coupling element to terminate at a secondary end 60 at a level which is substantially equal to the secondary tube portion. A
continuous electronic ignition 62 is located within the coupling element adjacent the secondary end 60 of the supply line for providing continuous ignition to the supply line.
A hood 64 is mounted over the coupling element over the outlet 39. The hood 64 is a conical shaped wall member 65 which is open at both a top end 66 and a bottom end 68. The bottom end 68 of the hood 64 has a diameter which is greater than that of the outlet 39 of the coupling element such that cooling air and further combustion air is permitted to enter the hood through an annular space defined between the coupling element and the bottom end of the wall member of the hood 64.
The top end 66 is narrower than the bottom end 68 such that the hood forms a venturi nozzle acting on the combusted gas passing through the hood.
As the gas is flowing through the hood, additional combustion air is drawn in through the annular space adjacent the bottom end of the hood. The hood hides the flame of the combustion which occurs within the outlet of the coupling element. Brackets 70 support the hood on the coupling element.
The use of a blower for forcing additional combustion air into the stream of waste gas as it is being combusted ensures a complete combustion of undesirable and harmful gases, a portion of which are otherwise being emitted into the atmosphere. Increasing the amount of combustion air permits the combustion temperature to be elevated for combusting the waste gas more effectively. The transmitter which senses the line pressure of the waste gas for controlling speed of the blower ensures that the ratio of combustion air to waste gas is suitable for complete combustion of the waste gas regardless of the line pressure.
In further arrangements, the transmitter may be arranged to sense other conditions of the waste gas such as the flow rate. Controlling the speed of the blower in proportion to the flow rate of the waste gas also ensures that the ratio of combustion air to waste gas is suitable for complete combustion of the waste gas despite varying conditions of the gas.
While one embodiment of the present invention has been described in the foregoing, it is to be understood that other embodiments are possible within the scope of the invention. The invention is to be considered limited solely by the scope of the appended claims.
FIELD OF THE INVENTION
This invention relates to a flare stack and more particularly to air assisted combustion of flare stack gases.
BACKGROUND
In the field of gas and oil production, it is common practice to use a stack for emitting waste gases up into the atmosphere. The use of a burner on the stack is known for combusting some of the unburned hydrocarbons and sulphurous oxides for reducing harmful gas emissions into the atmosphere. Known flare stacks however are not able to adequately burn waste gases resulting in a significant environmental problem as products of an incomplete combustion are permitted to escape into the atmosphere.
The present invention is concerned with certain improvements to the combustion of waste gases in flare stacks.
SUMMARY
According to the present invention there is provided a flare stack for combusting waste gas, the flare stack comprising;
a main stack tube having an inlet adjacent a bottom end for connection to a source of the waste gas, the main stack tube extending upward to a discharge end for directing a flow of the waste gas therethrough;
blower means for directing a flow of combustion air into the flow of waste gas adjacent the discharge end of the main stack tube;
sensing means for sensing a condition of the waste gas and for producing a blower signal representing the condition of the waste gas; and blower control means for receiving the blower signal from the sensing means and for controlling the blower means according to the blower signal received from the sensing means.
The use of a blower control ensures that a sufficient amount of combustion air is being supplied to the discharge end of the main stack tube relative to the amount of waste gas such that the waste gas can be completely combusted before the waste gas is discharged from the flare stack. Increasing the amount of combustion air permits the combustion temperature to be elevated for combusting the waste gas more effectively.
The blower control means preferably comprises a variable speed motor for driving the blower means at variable speeds corresponding to variations of the blower signal.
The sensed condition of the waste gas preferably comprises the pressure of the waste gas and the blower signal accordingly represents a magnitude of the pressure such that the speed of the blower increases with an increase in the pressure of the waste gas. The use of a flow meter or other type of sensing equipment is also suitable for supplying a suitable ratio of combustion air to waste gas for complete combustion of the waste gas.
There may be provided a hood mounted on the discharge end of the main stack tube, the hood comprising a tubular member having an open bottom end mounted on the discharge end of the stack tube and an open top end spaced upwardly from the discharge end, the top end having a smaller diameter than the bottom end.
The bottom end of the hood preferably has a greater diameter than the main stack tube defining an annular space therebetween such that additional combustion air is drawn past the discharge end of the main stack tube through the annular space.
Preferably there is provided a settling chamber connected to the source of waste gas and mounting the main stack tube thereon. The settling chamber preferably includes an inlet for connecting to the source of waste gas and an outlet for connecting to the main stack tube, the outlet having a smaller diameter than the inlet.
There may be provided an air tube connecting an outlet of the blower means to the discharge end of the main stack tube, the air tube preferably extending at an upward incline adjacent the discharge end of the main stack tube such that the flow of combustion air is directed upward into the flow of waste gas as the combustion air passes from the air tube into the main stack tube.
An ignitor is preferably mounted within the main stack tube adjacent the discharge end. When mounting the ignitor in the main stack tube, the ignitor preferably comprises a supply line of combustible fuel having a continuous electronic ignition mounted on an end thereof.
BRIEF DESCRIPTION OF THE DRAWINGS
In the accompanying drawings, which illustrate an exemplary embodiment of the present invention:
Figure 1 is a side elevational view of the flare stack.
Figure 2 is a cross sectional view of a bottom end of the stack.
Figure 3 is a cross sectional view of a discharge end of the stack.
DETAILED DESCRIPTION
Referring to the accompanying drawings, there is illustrated a flare stack generally indicated by reference numeral 10. The flare stack 10 provides air assisted combustion of waste gases to reduce the emission of waste gases which have not been sufficiently combusted and are harmful to the environment.
The flare stack 10 is supported on a concrete foundation 12 and includes a settling chamber 14 mounted on the foundation. The settling chamber is defined within a cylindrical member 16. The cylindrical member 16 is sealed at a bottom end by a plate 18 and sealed at a top end by cap 20.
An inlet pipe 22 is mounted through a side wall 24 of the cylindrical member 16 towards a top end 26 of the settling chamber. The inlet pipe connects to a pipeline of waste gas to be combusted in the flare stack. The inlet pipe directs the gas down into the settling chamber such that solid or liquid particles in the waste gas flow are able to settle out of the gas in the settling chamber before the gas is passed further along. The settling chamber also serves to regulate the pressure of the gas entering the flare stack, as the inlet pressure tends to fluctuate.
An outlet 28 is mounted in the cap 20 at the top end 26 of the settling chamber. The outlet 28 has a diameter which is smaller than the inlet pipe 22 for constricting the flow of gas through the outlet. The outlet 28 is located at the top end such that the gas which is removed from the settling chamber is adjacent the top end where the gas has had a chance to let the solid and liquid particles settle.
A main stack tube 30 is mounted on the outlet 28. The main stack tube 30 is an elongate cylindrical tube which extends vertically upward and has a diameter which is substantially equal to the outlet 28. The main stack tube 30 allows the waste gas to exit the settling chamber through the outlet and pass through the tube to a discharge end 32 at a top end of the stack tube. The gas is then discharged through the discharge end 32 as it is combusted.
A coupling element 34 is mounted on the discharge end of the main stack tube for directing a flow of combustion air into the stream of waste gas exiting the discharge end stack tube. The coupling element 34 includes a main tube portion 36 in alignment with the main stack tube and a secondary tube portion 38 which is coupled to the main tube portion. The secondary tube portion 38 extends at an upward incline as it merges with the main tube portion for directing the flow of combustion air therethrough for mixing with the waste gas exiting the discharge end of the main stack tube. An outlet 39 at a top end of the coupling element allows the gas to be discharged therefrom as it is combusted.
A blower 40 is mounted adjacent the cylindrical member 16 for generating the flow of combustion air. The blower 40 has an outlet 42 which is directed upward and connected to a combustion air tube 44. The air tube 44 extends alongside the main stack tube and communicates with the secondary tube portion of the coupling element at a top end of the air tube. The air tube and blower are supported on the main stack tube by brackets 46. The blower 40 is an explosion proof type blower.
The blower 40 includes a variable frequency drive 48 for driving the blower. The variable frequency drive 48 is arranged to send an electrical speed signal to the blower corresponding to a given blower speed within a range of blower speeds for adjusting the rate of the flow of combustion air.
The variable frequency drive 48 is controlled by a transmitter 50 mounted in the settling chamber adjacent the inlet pipe 22. The transmitter 50 includes a sensor for measuring the line pressure and translates that pressure into an electrical pressure signal. The transmitter 50 transmits the pressure signal to the variable frequency drive 48 which then transmits an appropriate speed signal to the blower such that the blower speed increases in proportion with the line pressure sensed by the transmitter.
In this arrangement, the ratio of combustion air to waste gas being emitted from the flare stack is controlled and optimised for complete combustion of the waste gas. The transmitter continuously monitors the line pressure such that the blower continuously runs at a desired speed for effective combustion of the waste gas.
An ignitor 52 is located adjacent the coupling element for igniting the waste gas with the combustion air as the gas passes through the coupling element.
The ignitor includes a supply line 54 mounted alongside the main stack tube with brackets for supplying a small quantity of combustible gas to ignite the waste gas.
The supply line 54 extends generally upward and terminates at an end 56 adjacent the outlet at a top end of the coupling element. A secondary line 58 of the supply line is connected to the supply line adjacent the end 56 and extends at a downward incline into the primary tube portion of the coupling element to terminate at a secondary end 60 at a level which is substantially equal to the secondary tube portion. A
continuous electronic ignition 62 is located within the coupling element adjacent the secondary end 60 of the supply line for providing continuous ignition to the supply line.
A hood 64 is mounted over the coupling element over the outlet 39. The hood 64 is a conical shaped wall member 65 which is open at both a top end 66 and a bottom end 68. The bottom end 68 of the hood 64 has a diameter which is greater than that of the outlet 39 of the coupling element such that cooling air and further combustion air is permitted to enter the hood through an annular space defined between the coupling element and the bottom end of the wall member of the hood 64.
The top end 66 is narrower than the bottom end 68 such that the hood forms a venturi nozzle acting on the combusted gas passing through the hood.
As the gas is flowing through the hood, additional combustion air is drawn in through the annular space adjacent the bottom end of the hood. The hood hides the flame of the combustion which occurs within the outlet of the coupling element. Brackets 70 support the hood on the coupling element.
The use of a blower for forcing additional combustion air into the stream of waste gas as it is being combusted ensures a complete combustion of undesirable and harmful gases, a portion of which are otherwise being emitted into the atmosphere. Increasing the amount of combustion air permits the combustion temperature to be elevated for combusting the waste gas more effectively. The transmitter which senses the line pressure of the waste gas for controlling speed of the blower ensures that the ratio of combustion air to waste gas is suitable for complete combustion of the waste gas regardless of the line pressure.
In further arrangements, the transmitter may be arranged to sense other conditions of the waste gas such as the flow rate. Controlling the speed of the blower in proportion to the flow rate of the waste gas also ensures that the ratio of combustion air to waste gas is suitable for complete combustion of the waste gas despite varying conditions of the gas.
While one embodiment of the present invention has been described in the foregoing, it is to be understood that other embodiments are possible within the scope of the invention. The invention is to be considered limited solely by the scope of the appended claims.
Claims (10)
1. A flare stack for combusting waste gas, the flare stack comprising;
a main stack tube having an inlet adjacent a bottom end for connection to a source of the waste gas, the main stack tube extending upward to a discharge end for directing a flow of the waste gas therethrough;
blower means for directing a flow of combustion air into the flow of waste gas adjacent the discharge end of the main stack tube;
sensing means for sensing a condition of the waste gas and for producing a blower signal representing the condition of the waste gas; and blower control means for receiving the blower signal from the sensing means and for controlling the blower means according to the blower signal received from the sensing means.
a main stack tube having an inlet adjacent a bottom end for connection to a source of the waste gas, the main stack tube extending upward to a discharge end for directing a flow of the waste gas therethrough;
blower means for directing a flow of combustion air into the flow of waste gas adjacent the discharge end of the main stack tube;
sensing means for sensing a condition of the waste gas and for producing a blower signal representing the condition of the waste gas; and blower control means for receiving the blower signal from the sensing means and for controlling the blower means according to the blower signal received from the sensing means.
2. The flare stack according to claim 1 wherein the blower control means comprises a variable speed motor for driving the blower means at variable speeds corresponding to variations of the blower signal.
3. The flare stack according to claim 2 wherein the sensed condition of the waste gas is the pressure of the waste gas and the blower signal represents a magnitude of the pressure such that the speed of the blower increases with an increase in the pressure of the waste gas.
4. The flare stack according to claim 1 wherein there is provided a hood mounted on the discharge end of the main stack tube, the hood comprising a tubular member having an open bottom end mounted on the discharge end of the stack tube and an open top end spaced upwardly from the discharge end, the top end having a smaller diameter than the bottom end.
5. The flare stack according to claim 4 wherein the bottom end of the hood has a greater diameter than the main stack tube defining an annular space therebetween such that additional combustion air is drawn past the discharge end of the main stack tube through the annular space.
6. The flare stack according to claim 1 wherein there is provided a settling chamber connected to the source of waste gas and mounting the main stack tube thereon.
7. The flare stack according to claim 6 wherein the settling chamber includes an inlet for connecting to the source of waste gas and an outlet for connecting to the main stack tube, the outlet having a smaller diameter than the inlet.
8. The flare stack according to claim 1 wherein there is provided an air tube connecting an outlet of the blower means to the discharge end of the main stack tube, the air tube extending at an upward incline adjacent the discharge end of the main stack tube such that the flow of combustion air is directed upward into the flow of waste gas as the combustion air passes from the air tube into the main stack tube.
9. The flare stack according to claim 1 wherein there is provided an ignitor mounted within the main stack tube adjacent the discharge end.
10. The flare stack according to claim 9 wherein the ignitor comprises a supply line of combustible fuel having a continuous electronic ignition mounted on an end thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2285811 CA2285811A1 (en) | 1999-10-12 | 1999-10-12 | Air assisted combustion of waste gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2285811 CA2285811A1 (en) | 1999-10-12 | 1999-10-12 | Air assisted combustion of waste gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2285811A1 true CA2285811A1 (en) | 2001-04-12 |
Family
ID=4164357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2285811 Abandoned CA2285811A1 (en) | 1999-10-12 | 1999-10-12 | Air assisted combustion of waste gas |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2285811A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8967995B1 (en) * | 2013-08-14 | 2015-03-03 | Danny Edward Griffin | High-efficiency dual flare system |
-
1999
- 1999-10-12 CA CA 2285811 patent/CA2285811A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8967995B1 (en) * | 2013-08-14 | 2015-03-03 | Danny Edward Griffin | High-efficiency dual flare system |
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|---|---|---|---|
| FZDE | Dead |
