The large burner linked below will take care of about a three foot Big Honking Pan. Fourteen feet is a lot, though. Usually when you get into that range, people just cook over an outdoor wood fire, as linked in the next post...

Here is a link that might be useful: Paella burners

Here's a really Big Honking Pan:

Here is a link that might be useful: Really Big Honking Pan

Okay, I see my mistake. Please refer to my new string.

Holy cow -- that is the biggest pan I have ever seen.