Quote:
Originally Posted by rmay635703
Where would I get a flame arrester out of curiousity? I definately want a very small steel tube for the input and a shutoff. I want the flow rate as low as possible but am not sure how to accomplish it gravity fed given the viscousity of the oil.
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That's some stuff I can't help with, but a flame arrester is nothing more than a screen somewhere in the line that forces flames which might make it up the line to spread out and cool.
Have you played with a Bunsen burner? When you put a piece of screen over it, the flame spreads out evenly around the screen. You'd just want to put it somewhere in the line of flow a few inches from the opening, at least. No need to buy anything, a small piece of chore-boy would work fine. (Steel wool, rather. Chore boy emits noxious gasses when it gets hot, because it's copper.)
We just happened onto a way to do it with crap (literally) that we already had laying around from fixing the house, the cars, or other people's stuff, and it worked pretty good.
If you have access to the inside of the firebox, add something for the oil to drip onto and expand/spread as it heats up, otherwise you might end up with a puddle of oil in the burner.
We used a piece of expanded steel turned at such an angle that the oil could spread (via gravity and heat expansion) over it, while the flames could climb up it, to ensure a fairly clean, complete burn of the used motor oil/cooking oil/brake fluid/whatever.
I'm almost certain you could just put a few lava rocks on a grate in the firebox and let the oil drip onto them, though. They'll absorb the oil somewhat, and the heat will wick the oil back out and burn it slowly.