where can i find a good set of plans to convert my oil furnace to an waste oil burner

"A Babington burner works like a whale's blow hole. Fuel flowing over a curved creates a thin film due to surface tension. When this film is pierce by a jet of air from a very small hole (typically .010 inch), the fuel is not only atomized quite well, but also, enough air is entrained by the atomized fuel to complete the combustion, so there's no need for additional forced air for combustion.

The huge advantage of Babington burners is that there's no nozzle to clog: the fuel flows over the small air hole, rather than through it, making this a very popular waste oil burner. So long as the fuel pump can handle whatever is in the liquid, be it metal shavings, french fry bits, or dirt, the burner will continue working without fail. The tradeoff for this lack of clogging is that you need to have a fuel sump that's located below the atomizer nozzle. [...]

Due to the excellent atomization, Babington burners will burn many heavy and waste oils such as:

* diesel (~140,000 BTU/gallon)