Technically almost any burner will work...it will just take longer.
I use the original cast iron burner I got with a turkey fryer. The regulator is the limiting factor on those burners - which is why you never seem them rated to a certain BTU, because its all about the regulator. A 5 psi regulator will work to bring 10 gallons to a boil but a 10 psi will get you there a lot faster. There are adjustable ones up to 30 psi.
I use a 10 psi regulator for a 25 gallon pot - commonly boiling 20 gallons in it.