CA1187394A - Igniter for a gas discharge pipe - Google Patents
Igniter for a gas discharge pipeInfo
- Publication number
- CA1187394A CA1187394A CA000411788A CA411788A CA1187394A CA 1187394 A CA1187394 A CA 1187394A CA 000411788 A CA000411788 A CA 000411788A CA 411788 A CA411788 A CA 411788A CA 1187394 A CA1187394 A CA 1187394A
- Authority
- CA
- Canada
- Prior art keywords
- nozzle
- housing
- fuel
- downstream end
- igniter
- 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
Abstract
ABSTRACT OF THE DISCLOSURE
An igniter for gas discharge pipes such as flare lines produces a remotely controlled flame. The igniter has a tubular housing that is mounted to the gas discharge pipe. A fuel line extends through the housing and terminates in a nozzle. A swirling device creates a swirling motion in the nozzle to prevent extinguishment due to high winds. An electrical system creates an electrical spark in the nozzle to ignite the fuel. An auxiliary line provides fuel unmixed with air to the nozzle to enrichen the mixture and provide coloration to the flame. The nozzle extends laterally from the hous-ing. The mounting means allows the nozzle to discharge the flame across the face of the discharge pipe. A heat shield protects the upstream end of the housing from heat due to the discharge pipe.
An igniter for gas discharge pipes such as flare lines produces a remotely controlled flame. The igniter has a tubular housing that is mounted to the gas discharge pipe. A fuel line extends through the housing and terminates in a nozzle. A swirling device creates a swirling motion in the nozzle to prevent extinguishment due to high winds. An electrical system creates an electrical spark in the nozzle to ignite the fuel. An auxiliary line provides fuel unmixed with air to the nozzle to enrichen the mixture and provide coloration to the flame. The nozzle extends laterally from the hous-ing. The mounting means allows the nozzle to discharge the flame across the face of the discharge pipe. A heat shield protects the upstream end of the housing from heat due to the discharge pipe.
Description
'731~
~ACKGROUND OF T~l~ INV~NTION
This invention relates in general to devices for igniting a gasJ and in particular to an igniter for igniting a gas being flared from a gas discharge pipe such as in oil and gas well drilling and productionO
In oil and gas well drilling, a drill bit is rotated by a string of drill pipe from a drill rig. Drilling fluid, normally a liquid containing wat-er and various chemicals known as "mud", ls pumped down the drill pipe, and cir-culated up the annulus surrounding the drill pipe. The mud returns formation cuttings to the surface, cools the drill bit and also prevents the well from blowing outO The weight of the mud is selected so that it will exert a greater hydrostatic force than the formation pressure to prevent formation fluids from blowing the mud out of the holeO
It is not uncommon to experience gas kicks that blow a certain a-mount of mud from the well and result in a large gas bubble that flows to the surface. Often this is due to unexpected high pressure zonesO When this occurs, the drill pipe can be sealed at the rig floor, with the gas being discharged out a flare line~ which extends outward from the drill rig about 250 feet or so, if possible. Flare lines or gas discharge lines are also used in well production and drill stem testing operations, wherein the well is tested by isolating the formation from well hydrostatic pressure and allowing the formation fluid to flow upward through the drill pipe to the surface. Gas is also flared in cer-tain production operations through vertical flaresO
It is necessary to burn the gas being discharged out the flare line.
This is sometimes a problem because of the poor quality of the gas being pro-duced. ~ud~ acid, and other liquids will blow out the flare line along with the gas, thus tending to extinguish any flame. In the prior art technique for nonvertical lines, a bucket containing a llquid fuel or material soaked with ., ~
fuel is placed and ignited near the end o:E the flare line to ignite any gas be-ing produced out the flare line. The liquids being discharged often extinguish the flame of the igniting materials. Re-igniting is dangerous for operating personnel because of the proximity to the flare line when igniting the gas.
In the prior art vertical stack techniques, a Euel soaked rag or the like might be ignited and thrown upward in the vicinity of the stack. Also, burners have been placed inside stacks, but they have eventually failed because of high temperatures.
SUMMARY OF THE INVEN~ION
According to one aspect of the invention, there is provided an igniter for a gas discharge pipe, comprising:
a tubular housing having a downstream end and an upstream end;
a fuel line extending in the housing and spaced therefrom, having one end adapted to be connected to a source of gaseous fuel and the other terminating in a nozzle at the downstream end of the housing;
port means located in the fuel line near the downstream end of -the housing adjacent the nozzle Eor mixing air with the fuel to create a combustible air/fuel mixture;
said housing extending past said port means in an upstream direction;
seal means between the downstream end of the housing and the downstream end of the nozzle for requiring air entering ~he port means to be drawn from the upstream end of the housing; and electrical spark means for creating an electrical spark in the nozzle to ignite the air/fuel mixture.
According to another aspect of the invention, there is provided an igniter for a gas discharge pipe, comprising:
a tubular housing having a downstream end and an upstream end;
. .
~'73~
fuel line means extending into the housing, having one end adapted to be connected to a source of gaseous fuel and the other terminating in a nozzle at the downstream end of the housing;
port means in the fuel line means near the downstream end of the housing adjacent the nozzle for admitting air to the fuel to make a combustible air/fuel tnixture immediately before the nozzle;
said tubular housing surrounding said fuel line means in spaced relation and extending upstream past said port means;
seal means between the downstream end of said houslng and the downstream end of said nozzle to prevent air in the vicinity oE the discharge of the nozzle from entering the port means, the housing being closed to the atmosphere except at the upstream end so as to require all air being drawn into the port means to enter from the upstream end;
electrical spark means for creating an electrical spark in the nozzle to ignite the air/fuel mixture; and mounting means for mounting the igniter to the exterior of a gas discharge pipe so that the nozzle discharges a flame across the face of the discharge pipe.
BRIE.F DESCRIPTION OF THE DRAWINGS
Figure l is a perspective view of an igniter constructed in accord-ance with this invention, shown mounted to a gas discharge line. Figure 2 is an enlarged perspective view of the igniter oE Pigure 1. Figure 3 is an en~
larged view of the upstream end of the igniter, with the housing removed. Fig-ure 4 is an enlarged perspective view of the downs-tream end of the igniter of Figure 1, with the housing removed. Figure 5 (sheet 3) is a schematic end view of the igniter of Figure 1.
3''~
DESCRIPTION OF THE PREFERRED EMBODIMENT
-Referring to Figure 2, igniter 11 includes a tubular housing 13.
Housing 13 i.s a straight cylind.rical pipe having an open rearward or upstream end 15. The downstream end 17 comprises a tubular elbow or member that is curved 45 degrees. A flat plate or flange 19 is secured to the downstream end - 3a -73~
17 and extends parallel with the axis of the straight portion of housing 13.
An aperture 21 is located in flange 19 for discharging a flame from igniter 11.
A h~at shield 23 of a length about one fourth that of housing 13 is secured to the upstream end of housing 130 Heat shield 23 is a two-piece tubu-lar member of a diameter about twice that of the housing 130 The upstream end 25 of heat shield 23 protrudes rearwardly a few inches past the upstream end 15 of housing 13 and is also open. The downstream end ~7 of heat shield 23 has a hole of diameter equal to housing 13 for tightly securing heat shield 23 to the housing. A pair of flanges 29 connect the two halves of the heat shield lQ 23 by means of bolts 310 Referring to Figure 3, a "T" shaped fitting or manifold 33 has threads. for securing to a source of gaseous fuel such as propane. Manifold 33 has another set of threads for connection to a valve 35, which in turn is connected to an "L" shaped fitting 37. The third connection to manifold 33 is to a Inain gas line 39. The "L" shaped fitting 37 is connected to an auxiliary gas line 41, with valve 35 controlling the amount of fuel that will flow through auxiliary line 41~
Referring to Figure 4, main gas line 39 extends to a port means 43 ~hich has. apertures 45 of selected size for introducing of air to the gaseous
~ACKGROUND OF T~l~ INV~NTION
This invention relates in general to devices for igniting a gasJ and in particular to an igniter for igniting a gas being flared from a gas discharge pipe such as in oil and gas well drilling and productionO
In oil and gas well drilling, a drill bit is rotated by a string of drill pipe from a drill rig. Drilling fluid, normally a liquid containing wat-er and various chemicals known as "mud", ls pumped down the drill pipe, and cir-culated up the annulus surrounding the drill pipe. The mud returns formation cuttings to the surface, cools the drill bit and also prevents the well from blowing outO The weight of the mud is selected so that it will exert a greater hydrostatic force than the formation pressure to prevent formation fluids from blowing the mud out of the holeO
It is not uncommon to experience gas kicks that blow a certain a-mount of mud from the well and result in a large gas bubble that flows to the surface. Often this is due to unexpected high pressure zonesO When this occurs, the drill pipe can be sealed at the rig floor, with the gas being discharged out a flare line~ which extends outward from the drill rig about 250 feet or so, if possible. Flare lines or gas discharge lines are also used in well production and drill stem testing operations, wherein the well is tested by isolating the formation from well hydrostatic pressure and allowing the formation fluid to flow upward through the drill pipe to the surface. Gas is also flared in cer-tain production operations through vertical flaresO
It is necessary to burn the gas being discharged out the flare line.
This is sometimes a problem because of the poor quality of the gas being pro-duced. ~ud~ acid, and other liquids will blow out the flare line along with the gas, thus tending to extinguish any flame. In the prior art technique for nonvertical lines, a bucket containing a llquid fuel or material soaked with ., ~
fuel is placed and ignited near the end o:E the flare line to ignite any gas be-ing produced out the flare line. The liquids being discharged often extinguish the flame of the igniting materials. Re-igniting is dangerous for operating personnel because of the proximity to the flare line when igniting the gas.
In the prior art vertical stack techniques, a Euel soaked rag or the like might be ignited and thrown upward in the vicinity of the stack. Also, burners have been placed inside stacks, but they have eventually failed because of high temperatures.
SUMMARY OF THE INVEN~ION
According to one aspect of the invention, there is provided an igniter for a gas discharge pipe, comprising:
a tubular housing having a downstream end and an upstream end;
a fuel line extending in the housing and spaced therefrom, having one end adapted to be connected to a source of gaseous fuel and the other terminating in a nozzle at the downstream end of the housing;
port means located in the fuel line near the downstream end of -the housing adjacent the nozzle Eor mixing air with the fuel to create a combustible air/fuel mixture;
said housing extending past said port means in an upstream direction;
seal means between the downstream end of the housing and the downstream end of the nozzle for requiring air entering ~he port means to be drawn from the upstream end of the housing; and electrical spark means for creating an electrical spark in the nozzle to ignite the air/fuel mixture.
According to another aspect of the invention, there is provided an igniter for a gas discharge pipe, comprising:
a tubular housing having a downstream end and an upstream end;
. .
~'73~
fuel line means extending into the housing, having one end adapted to be connected to a source of gaseous fuel and the other terminating in a nozzle at the downstream end of the housing;
port means in the fuel line means near the downstream end of the housing adjacent the nozzle for admitting air to the fuel to make a combustible air/fuel tnixture immediately before the nozzle;
said tubular housing surrounding said fuel line means in spaced relation and extending upstream past said port means;
seal means between the downstream end of said houslng and the downstream end of said nozzle to prevent air in the vicinity oE the discharge of the nozzle from entering the port means, the housing being closed to the atmosphere except at the upstream end so as to require all air being drawn into the port means to enter from the upstream end;
electrical spark means for creating an electrical spark in the nozzle to ignite the air/fuel mixture; and mounting means for mounting the igniter to the exterior of a gas discharge pipe so that the nozzle discharges a flame across the face of the discharge pipe.
BRIE.F DESCRIPTION OF THE DRAWINGS
Figure l is a perspective view of an igniter constructed in accord-ance with this invention, shown mounted to a gas discharge line. Figure 2 is an enlarged perspective view of the igniter oE Pigure 1. Figure 3 is an en~
larged view of the upstream end of the igniter, with the housing removed. Fig-ure 4 is an enlarged perspective view of the downs-tream end of the igniter of Figure 1, with the housing removed. Figure 5 (sheet 3) is a schematic end view of the igniter of Figure 1.
3''~
DESCRIPTION OF THE PREFERRED EMBODIMENT
-Referring to Figure 2, igniter 11 includes a tubular housing 13.
Housing 13 i.s a straight cylind.rical pipe having an open rearward or upstream end 15. The downstream end 17 comprises a tubular elbow or member that is curved 45 degrees. A flat plate or flange 19 is secured to the downstream end - 3a -73~
17 and extends parallel with the axis of the straight portion of housing 13.
An aperture 21 is located in flange 19 for discharging a flame from igniter 11.
A h~at shield 23 of a length about one fourth that of housing 13 is secured to the upstream end of housing 130 Heat shield 23 is a two-piece tubu-lar member of a diameter about twice that of the housing 130 The upstream end 25 of heat shield 23 protrudes rearwardly a few inches past the upstream end 15 of housing 13 and is also open. The downstream end ~7 of heat shield 23 has a hole of diameter equal to housing 13 for tightly securing heat shield 23 to the housing. A pair of flanges 29 connect the two halves of the heat shield lQ 23 by means of bolts 310 Referring to Figure 3, a "T" shaped fitting or manifold 33 has threads. for securing to a source of gaseous fuel such as propane. Manifold 33 has another set of threads for connection to a valve 35, which in turn is connected to an "L" shaped fitting 37. The third connection to manifold 33 is to a Inain gas line 39. The "L" shaped fitting 37 is connected to an auxiliary gas line 41, with valve 35 controlling the amount of fuel that will flow through auxiliary line 41~
Referring to Figure 4, main gas line 39 extends to a port means 43 ~hich has. apertures 45 of selected size for introducing of air to the gaseous
2~ fuel flowing through the main fuel line 39. A nozzle section ~7 extends down-stream from the port means 43. Nozzle section ~7 is tuhular and of larger dia-meter than the main fuel line 39. Nozzle section 47 is bent gradually al an acute angle and extends to a larger diameter cylindrical section 49. Nozzle s:ection 49 is a straight tubular member of diame-ter several times that of -the main fuel line 390 A nozzle section 51 of diameter about twice the diameter of section 49 is secured to the downstream end of secti.on 49 and forms the down-
3~3~
stream end of igniter 11. Section 51 is a straight cylindrical member, but its downstream end is cut at an acute angle with respect to its axis and coveredby an annular ~lange 53. Flange 53 ~its sealingly against flange 19 encircl-ing aperture 21 ~Figure 1). The bend in section 47 and the angle at which the clownstreanl end of section 51 is cut, results in flange 53 being in a plane that :is parallel with the axis of housing 13~ The total angle of change from port means, 43 to the end of the nozzle section 51 is abou~ ~5 degrees.
A swirl means 55 is mounted in s,ection 49. Swirl means 55 in the preferred embodiment consists of a plurality of blades 57 each of which have a pitch or inclination with respect to the fuel flow for causing the swirling actionO Blades 57 are rigidly coupled together and rigidly mounted in sec-tion
stream end of igniter 11. Section 51 is a straight cylindrical member, but its downstream end is cut at an acute angle with respect to its axis and coveredby an annular ~lange 53. Flange 53 ~its sealingly against flange 19 encircl-ing aperture 21 ~Figure 1). The bend in section 47 and the angle at which the clownstreanl end of section 51 is cut, results in flange 53 being in a plane that :is parallel with the axis of housing 13~ The total angle of change from port means, 43 to the end of the nozzle section 51 is abou~ ~5 degrees.
A swirl means 55 is mounted in s,ection 49. Swirl means 55 in the preferred embodiment consists of a plurality of blades 57 each of which have a pitch or inclination with respect to the fuel flow for causing the swirling actionO Blades 57 are rigidly coupled together and rigidly mounted in sec-tion
4~.
A conventional internal combus,tion spark plug 59 is mounted ~o sec-tion 49. Spark plug 59 has two spaced-apart electrodes 61 and 63 inside of sec-tion 49. Electrode 61 is g~ounded to section 49, while electrode 63 is connect-ed to a wire 65 for supplying electrical energy. Referring again to Figure 3, wire 65 is connected to a conventional motor vehicle coil 67 which supplies high~oltage DC current to spark plug 590 A wire 68 leads from coil 67 to an energy source.
Referring again to Figure 4, the auxiliary line 41 extends the length of igniter 11 and has a downstream end 69 located in section 51. Other struc-ture of the igniter 11 includes insulators 71 for insulating wire 65 and sup-porting ito A shaft 73 (only partially shown) extends the length of igniter 11 for supporting the ~uel lines 39 and 41 and insulators 71.
Referring to Figure 1, a remote control box 75 is preferably mounted at the rig floor or another remote point and connected to wire 680 Control box 39~
75 is connected to a battery 76 for supplying current to coil 67 ~Figure 3).
Mounting means for mounting the igniter ll to a discharge pipe 77 depend upon the type of discharge pipe. In the case of a nonvertical discharge pipe, as shown, the mounting means is preferably a pair of clamps 79 that are clamped about discharge pipe 770 A channel member ~l is secured between clamps 79.
Ilousing 13 is bolted to channel member 81 by suitable brackets. The clamps 79 are located so that the flame projected by igniter ll will discharge downwardly ~cross the face or end of discharge pipe 77 at an angle of about ~5 degrees.
As shown in Figure 5~ the flame projected by igniter ll will be perpendicular to the axis of discharge pipe 77, but inclined so that it would be in the first quadrant of an X-Y coordinate systemO The second quadrant, which is the quadrant bounded by positive Y and negative X would also be acceptableO The length of the flame projected by igniter ll will be greater than the heights of clamps 7~, so that it will discharge completely across the face of discharge pipe 77. Discharge pipe 77 will often be located on a tripod or stand 83 as shown. In the case of a vertical discharge pipe 77, flange 1~ may hang over the lip or upper edge oE the discharge pipe.
To install the igniter ll, it will be placed in the position des-cribed on a discharge line 77. Electrical wire 68 will be connected to control ~0 box 75, which is connected to battery 76, both of which will be mounted at a remote lscationO A conduit 85 leading from a source oE gaseous fuel will be connected to manifo]d 33 ~Figure 3)0 In operation, whenever it is conceivable that gas might be discharged from gas discharge line 77, the igniter 11 should be in operationO To light the igniter, a gaseous fuel from a remote location is supplied to manifold 33 through conduit 850 As shown in Figure ~, air will mix with the fuel flow '7~
through port apertures ~5~ with the air/fuel mixture discharging through swirl means 55 and swirling about the sec~ion 490 Electrical energy will be provided ~y pressing the proper control button at the control box 75, which sends DC
current thro~gh coil 67 and to spark plug 590 Spark is generated between elec-trodes 61 and 63, igniting the swirling fuel air mixtureO This results in a flame being discharged out through section 510 To provide coloration to assure to the operating personnel that a flame exists, a measured amount of fuel$ without any air being mixed in it, is discharged into section 51, where it burns and adds the yellow coloration to the flameO All fresh air supplied to ports ~5 comes from the open upstream end 15~ the downstream end 17 (Figure 2) of the housing being sealed to the nozzle section 51. The flame will ignite gas being discharged out gas pipe 770 The igniter can be turned off by cutting off the fuel flowing through conduit 55.
In the preferred embodiment, spark plug 59, coil 67, control box 75 and the battery provide electrical spark means for creating an electrical spark in the noæzle to ignite the fuelO The auxiliary line ~1, manifold 33 and valve 35 provide means for enriching the air/fuel ratio at the nozzle to add colora-tion to the flameO Sections 49 and 51 serve as a nozzle for the igniterO
The above described construction has significant advantages. The igniter can be operated from a remote location to avoid danger to personnel that might otherwise have to light, by hand, a gas discharge. lhe swirl means 55 and the nozzle extension 51 prevent the igniter flame from being extinguished even in a high wind~ The positioning of the igniter above the gas discharge, in the case of nonvertical 1are lines, avoids the igniter being plugged or extinguish-ed from heavy liquids being blown from the pipe. Positioning ~he igniter in the first or second quadrants at a ~5 degree angle locates it out of the most extreme heat, which wo~lld be directly above the flareO The heat shield avoids damage to the coil and associated valves and components on the upstream end of the igniter. A supply of fresh air for mixing is available from the upstream cndO
A conventional internal combus,tion spark plug 59 is mounted ~o sec-tion 49. Spark plug 59 has two spaced-apart electrodes 61 and 63 inside of sec-tion 49. Electrode 61 is g~ounded to section 49, while electrode 63 is connect-ed to a wire 65 for supplying electrical energy. Referring again to Figure 3, wire 65 is connected to a conventional motor vehicle coil 67 which supplies high~oltage DC current to spark plug 590 A wire 68 leads from coil 67 to an energy source.
Referring again to Figure 4, the auxiliary line 41 extends the length of igniter 11 and has a downstream end 69 located in section 51. Other struc-ture of the igniter 11 includes insulators 71 for insulating wire 65 and sup-porting ito A shaft 73 (only partially shown) extends the length of igniter 11 for supporting the ~uel lines 39 and 41 and insulators 71.
Referring to Figure 1, a remote control box 75 is preferably mounted at the rig floor or another remote point and connected to wire 680 Control box 39~
75 is connected to a battery 76 for supplying current to coil 67 ~Figure 3).
Mounting means for mounting the igniter ll to a discharge pipe 77 depend upon the type of discharge pipe. In the case of a nonvertical discharge pipe, as shown, the mounting means is preferably a pair of clamps 79 that are clamped about discharge pipe 770 A channel member ~l is secured between clamps 79.
Ilousing 13 is bolted to channel member 81 by suitable brackets. The clamps 79 are located so that the flame projected by igniter ll will discharge downwardly ~cross the face or end of discharge pipe 77 at an angle of about ~5 degrees.
As shown in Figure 5~ the flame projected by igniter ll will be perpendicular to the axis of discharge pipe 77, but inclined so that it would be in the first quadrant of an X-Y coordinate systemO The second quadrant, which is the quadrant bounded by positive Y and negative X would also be acceptableO The length of the flame projected by igniter ll will be greater than the heights of clamps 7~, so that it will discharge completely across the face of discharge pipe 77. Discharge pipe 77 will often be located on a tripod or stand 83 as shown. In the case of a vertical discharge pipe 77, flange 1~ may hang over the lip or upper edge oE the discharge pipe.
To install the igniter ll, it will be placed in the position des-cribed on a discharge line 77. Electrical wire 68 will be connected to control ~0 box 75, which is connected to battery 76, both of which will be mounted at a remote lscationO A conduit 85 leading from a source oE gaseous fuel will be connected to manifo]d 33 ~Figure 3)0 In operation, whenever it is conceivable that gas might be discharged from gas discharge line 77, the igniter 11 should be in operationO To light the igniter, a gaseous fuel from a remote location is supplied to manifold 33 through conduit 850 As shown in Figure ~, air will mix with the fuel flow '7~
through port apertures ~5~ with the air/fuel mixture discharging through swirl means 55 and swirling about the sec~ion 490 Electrical energy will be provided ~y pressing the proper control button at the control box 75, which sends DC
current thro~gh coil 67 and to spark plug 590 Spark is generated between elec-trodes 61 and 63, igniting the swirling fuel air mixtureO This results in a flame being discharged out through section 510 To provide coloration to assure to the operating personnel that a flame exists, a measured amount of fuel$ without any air being mixed in it, is discharged into section 51, where it burns and adds the yellow coloration to the flameO All fresh air supplied to ports ~5 comes from the open upstream end 15~ the downstream end 17 (Figure 2) of the housing being sealed to the nozzle section 51. The flame will ignite gas being discharged out gas pipe 770 The igniter can be turned off by cutting off the fuel flowing through conduit 55.
In the preferred embodiment, spark plug 59, coil 67, control box 75 and the battery provide electrical spark means for creating an electrical spark in the noæzle to ignite the fuelO The auxiliary line ~1, manifold 33 and valve 35 provide means for enriching the air/fuel ratio at the nozzle to add colora-tion to the flameO Sections 49 and 51 serve as a nozzle for the igniterO
The above described construction has significant advantages. The igniter can be operated from a remote location to avoid danger to personnel that might otherwise have to light, by hand, a gas discharge. lhe swirl means 55 and the nozzle extension 51 prevent the igniter flame from being extinguished even in a high wind~ The positioning of the igniter above the gas discharge, in the case of nonvertical 1are lines, avoids the igniter being plugged or extinguish-ed from heavy liquids being blown from the pipe. Positioning ~he igniter in the first or second quadrants at a ~5 degree angle locates it out of the most extreme heat, which wo~lld be directly above the flareO The heat shield avoids damage to the coil and associated valves and components on the upstream end of the igniter. A supply of fresh air for mixing is available from the upstream cndO
Claims (2)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. An igniter for a gas discharge pipe, comprising:
a tubular housing having a downstream end and an upstream end;
a fuel line extending in the housing and spaced therefrom, having one end adapted to be connected to a source of gaseous fuel and the other terminating in a nozzle at the downstream end of the housing;
port means located in the fuel line near the downstream end of the housing adjacent the nozzle for mixing air with the fuel to create a combustible air/fuel mixture;
said housing extending past said port means in an upstream direction;
seal means between the downstream end of the housing and the downstream end of the nozzle for requiring air entering the port means to be drawn from the upstream end of the housing; and electrical spark means for creating an electrical spark in the nozzle to ignite the air/fuel mixture.
a tubular housing having a downstream end and an upstream end;
a fuel line extending in the housing and spaced therefrom, having one end adapted to be connected to a source of gaseous fuel and the other terminating in a nozzle at the downstream end of the housing;
port means located in the fuel line near the downstream end of the housing adjacent the nozzle for mixing air with the fuel to create a combustible air/fuel mixture;
said housing extending past said port means in an upstream direction;
seal means between the downstream end of the housing and the downstream end of the nozzle for requiring air entering the port means to be drawn from the upstream end of the housing; and electrical spark means for creating an electrical spark in the nozzle to ignite the air/fuel mixture.
2. An igniter for a gas discharge pipe, comprising:
a tubular housing having a downstream end and an upstream end;
fuel line means extending into the housing, having one end adapted to be connected to a source of gaseous fuel and the other terminating in a nozzle at the downstream end of the housing;
port means in the fuel line means near the downstream end of the housing adjacent the nozzle for admitting air to the fuel to make a combustible air/fuel mixture immediately before the nozzle;
said tubular housing surrounding said fuel line means in spaced relation and extending upstream past said port means;
seal means between the downstream end of said housing and the downstream end of said nozzle to prevent air in the vicinity of the discharge of the nozzle from entering the port means, the housing being closed to the atmosphere except at the upstream end so as to require all air being drawn into the port means to enter from the upstream end;
electrical spark means for creating an electrical spark in the nozzle to ignite the air/fuel mixture; and mounting means for mounting the igniter to the exterior of a gas discharge pipe so that the nozzle discharges a flame across the face of the discharge pipe.
a tubular housing having a downstream end and an upstream end;
fuel line means extending into the housing, having one end adapted to be connected to a source of gaseous fuel and the other terminating in a nozzle at the downstream end of the housing;
port means in the fuel line means near the downstream end of the housing adjacent the nozzle for admitting air to the fuel to make a combustible air/fuel mixture immediately before the nozzle;
said tubular housing surrounding said fuel line means in spaced relation and extending upstream past said port means;
seal means between the downstream end of said housing and the downstream end of said nozzle to prevent air in the vicinity of the discharge of the nozzle from entering the port means, the housing being closed to the atmosphere except at the upstream end so as to require all air being drawn into the port means to enter from the upstream end;
electrical spark means for creating an electrical spark in the nozzle to ignite the air/fuel mixture; and mounting means for mounting the igniter to the exterior of a gas discharge pipe so that the nozzle discharges a flame across the face of the discharge pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000411788A CA1187394A (en) | 1982-09-20 | 1982-09-20 | Igniter for a gas discharge pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000411788A CA1187394A (en) | 1982-09-20 | 1982-09-20 | Igniter for a gas discharge pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1187394A true CA1187394A (en) | 1985-05-21 |
Family
ID=4123623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000411788A Expired CA1187394A (en) | 1982-09-20 | 1982-09-20 | Igniter for a gas discharge pipe |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1187394A (en) |
-
1982
- 1982-09-20 CA CA000411788A patent/CA1187394A/en not_active Expired
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