Patent ID: 6085701
Filing Date: 2000-07-11
Classification: F24D,F24H

Abstract:
In a used-oil fired furnace having a cabinet housing a combustion chamber; and a burner assembly operable to project a flame within said combustion chamber, the improvement comprising:a coil tube heater including a coiled heat exchanger supported within said combustion chamber and being oriented such that said flame is projected with said coiled heat exchanger extending circumferentially around said flame, said coil tube heater having a liquid transfer medium circulated therethrough to transfer heat generated by said flame to a location remote from said cabinet, said coiled heat exchanger is formed from tubing coiled into a plurality of loops positioned adjacent one another, none of said loops being connected to any of said loops adjacent thereto, said coiled heat exchanger having an inlet line and an outlet line connected thereto for the circulation of said liquid transfer medium through said coiled heat exchanger.