You could just do a big Pyrex dish on basically any steady heat source. As long as you can keep it around 200 degrees you should be fine. You’re not going to very high temps so whatever you have will work. I think you’re talking about a griddle or something but I don’t know about that.
If you can pour it out in the glass so it’s just a thin film like a millimeter deep it’ll let go of the stink faster. Without equipment/solvents your options are pretty limited but it should help. Some stuff won’t evap off on its own though so don’t expect a miracle depending on what’s in your oil.