DE1778698A1 - Ignition burners, especially for flares - Google Patents

Description

Tulaa, Oklahoma 74 105 / VoSt, A.

Our sign t Z 424

Pilot burner especially for exhaust gas

The invention relates to an ignition device for burners and in particular to a pilot burner which is used for igniting a Main burner can be used and such a pilot burner is in particular for igniting the burner head suitable for an exhaust gas fan.

The ignition device according to the invention can serve as a pilot burner and has an elongated tubular element, which can generally be arranged in a vertical position «A partition wall extends in the substantially over the entire length of the tubular element and divides it so that two elongated Channels are created. Devices for generating an arc are provided in one of the channels, so that a gaseous Gremisii located in this channel can be ignited »This burning mixture moves downstream in the channel and downstream At the end of the partition wall, the flame of the gaseous mixture ignites. which from the other channel

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109033/0097 vtaitore

1) 78698

Further features and objects of the invention are set out in FIG The following description is explained with reference to the figures of the drawing, Ea show:

Pig. 1 shows an axial section of an ignition device according to the invention,

Pig 2 is a cross sectional view taken along line 2-2 of Pig 1 and 2

Pig «3 a plan on the one shown in Pig, 1 Ignition device.

The invention also relates to an ignition device for Burner and is particularly suitable for igniting burners that are located at a certain distance from the operating

personal and this igniter can be used to start combustion at the top of an exhaust flare. The igniter can generally be used in the upright position, as described in Pig. 1 is shown and this ignition device comprises a tubular element 10, which has any desired cross-section. In the illustrated embodiment, this pipe element is generally a cylindrical conduit ₀ The pipe element 10 is elongated and there is a puddle 11 is provided at the upper end or at the downstream end. The pool 11, which is arranged in the interior, has a central opening 12 which has a smaller flow cross-section than

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the entire tubular element 10. A number of openings arranged at a distance from one another in the circumferential direction 14 may be present in paddock 11, as in Pig. 3 is shown «

A partition 16 is within the tubular element a 10 provided and. this partition wall extends over the greater part of the length of this tubular element. The partition wall 16 can be attached to the tubular element in any desired manner, for example by means of Verohweißung. The downstream end 17 of the partition wall 16 ends shortly before a nozzle section 18 at the upper end of the pipe element 10. The partition wall 16 divides the tubular element into two elongated ones lying next to one another Channels 21 and 22.

Means are provided for introducing a gaseous fuel mixture into the upstream end 23 of the tubular element a 10. Any devices known to aioh can be used for this purpose. In the illustrated embodiment, an aspirator can be provided in order to generate a gaseous fuel mixture. The gas is supplied via a pipe 26 and introduced into the section of a component 28 via a nozzle 27. The negative pressure that is generated by the gas which emerges from the nozzle 27 is used to draw air into the component 28 in a manner known per se

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aspirate and the gas and air are mixed to create an ignitable mixture. This mixture will is inserted into tubular member 10 at a speed of at least 7.5 m / seo (25 feet / sec.) · The Movement speed of the gas - air mixture through both channels 21 and 22 is greater than the flame propagation speed of the fuel.

Any device can be provided to create an arc within one of the channels in the drilling element 10 to generate. An electric arc 10 can be developed by means of a spark plug 31, which is shown in FIG Tubular element 10 is mounted, wherein the electrodes of the spark plug are arranged within the channel 21, such as it in Pig. 1 is shown. The spark plug is preferably near the lower portion of the tubular member 10 arranged

If an ignitable mixture is passed through the tubular element 10 during operation, an arc is generated at the electrodes of the spark plug 31. This ignition arc ignites the gaseous mixture within the channel 21 and a flame is generated by burning this part of the gas-air mixture. The speed of movement of the gaseous Gemisohes in the channel 21 is greater than the speed of the spreading of the flames ρ The flames that are generated in the channel 21 who , 109833/0097

BATH ORIGINAL

den, move downstream in this channel and pass through the central opening 12 in the nozzle 18. The other part of the ignitable mixture, which is duroh Moved through the channel 22, it is shielded from the flame and this part of the gas-air mixture gets through not in contact with the flame until this part extends over the downstream end 17 of the partition 16 moved out. The flame moving through the channel 21 ignites the non-burning part of the gas mixture, so that the ignition of the entire gas-air mixture takes place in the area indicated at 33 is shown.

The flame within the channel 21 consumes the fuel located in the channel and generates a against one Combustion of inverted gas «, these inverted gases are led out of the channel 21 and in fact duroh the gas-air mixture that follows. After that, contain the gaseous mixtures that spread through both channels and 22 move through, ignitable gases which burn at the upper or downstream end of the tubular element 10. After the inverted gases have been flushed out of the channel 21, the gas-air mixture burns very stably within the range 33 »

The invention has been described with reference to specific structural features with reference to an arrangement of the Items Described · Note that amendments

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the components and the overall structure can be carried out and that these modifications are within the scope of the invention _e

Patent application

Claims (4)

- 7 claims , Ι.) Ignition device for fuel burner, characterized ^ by an elongated tubular element, a partition within the tubular element, which extends over most of the length of the tubular element and which this tubular element in two adjacent channels, namely a first and a second channel divided, wherein means are provided to supply an ignitable mixture to the upstream end of the tubular element at such a pressure as to lead the mixture through both channels hinduroh at flow rates which are greater than the flame propagation speed of the mixture and at a distance from the downstream End of the tubular element means are arranged to produce an ignition arc in the first of the channels, which ignites the mixture in this channel, after which the flame moves within the first channel beyond the downstream end of the partition wall out to ignite the mixture which from the second Channel exits. 2. Ignition device according to claim 1, characterized by a splash that is downstream within the tubular element is arranged from the partition wall, this Plan oh 109833/0097 Flange has a central opening that has a smaller Cross-section has ala the tubular element. 3. Ignition device naoh claim 1, daduroh characterized, that the tubular member has a nozzle portion which is the downstream end of the device forms, this nozzle section extending beyond the downstream end of the partition wall W extends 4. Ignition device according to claim 1, characterized gekennzeichr net that the ribhr-shaped element is cylindrical and that the partition wall in this cylinder is diametrical runs 109833/0097