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Old 05-30-2012, 05:19 PM   #1
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Pilot light for home made application


Hello,

For a project I'm working on (part of a supervised internship) I'm looking for a way to keep ignited a gas propane flow exiting a pipe.

I was thinking about using a pilot light, however I'm having some trouble to find which one choose and how to connect it. Most of the information I find on the internet are for changing parts of a pilot light.

I'm looking for tips to choose a pilot light (type? company? all included package?) and how to connect it.

Thanks

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Old 05-30-2012, 05:24 PM   #2
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Pilot light for home made application


Quote:
Originally Posted by Nanimo View Post
...looking for a way to keep ignited a gas propane flow exiting a pipe.
I'm looking for tips...
An ignition coil and a spark plug will do most of it nicely.
Some sort of control on the 12V feeding the coil is the trick.

A practical application of the technology:
http://www.youtube.com/watch?v=YhA69...eature=related

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Old 05-30-2012, 05:26 PM   #3
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Pilot light for home made application


If your looking for a cheap way....can't/won't help with that....

What your talking about starts to get into NFPA rules as it relates to flame safety....

I would suggest doing a search on Flame Safety....i.e., Honewell 7800 Flame safety relay....over kill for your solution but there is some good info there.

Look up Fire Eye.

Look up Purple Peeper...(flame detector)

If this was on a small scale, I would say just use the pilot off a water heater....has a built in valve to shut off the gas if the pilot goes out....but I suspect your project is maybe a bit more involved.

One of your issues is detecting the flame...that is where the purple peeper comes in....from that you need a device to strike a spark to light the propane....

It can all get very complicated especially when you start factoring in purge cycles and purge time...proof of gas valve closure, etc.
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Old 05-30-2012, 05:35 PM   #4
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Pilot light for home made application


To add more details the gas would exit the pipes wich are very small (0.03" ID). They are about 100 of them on a line. The propane would be burning in ambiant air. This is part of an experiment and I want to make sure that the propane exiting is burning to not create a propane bubble (I'm using propane for something else, I burn it for safety reason).

Yes I'm reviewing the NFPA rules since this morning (I need to do a safety report prior to approvals of the experiment).

Thanks TarheelTerp and ddawg16, I'll look at those.

PS: not looking for "cheap way", safety first
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Old 05-30-2012, 08:30 PM   #5
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Pilot light for home made application


We have to burn off the hydrogen from our heat treat furnaces and use constant spark electrodes. We changed over to this as the old system used flame sensors to trigger a spark igniter and sometimes had failures. I don't mess much with this system so I don't have the specifics on the equipment
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Old 05-30-2012, 08:34 PM   #6
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Pilot light for home made application


Danpik,

Do you have the references of that constant park electrodes - device?

Thanks
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Old 05-31-2012, 12:50 AM   #7
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Pilot light for home made application


One easy way to make a constant spark source is to use a step up transformer along with a spark plug.

If you use a 120vac to 12vac transformer....you could connect that to an automotive transformer....with the output connected to a spark plug...

If you go that route...use the coil from an HEI dist (Gen I or II SBC)...they are designed to run at a full 12v....older coils will burn up without the resistor.

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