STAGED SUPPLEMENTAL FIRING OF HIGH VANADIUM CONTENT FUEL OILS

摘要

A heat exchanger for burning fuel oil having vanadium and for preventing melting of vanadium complexes formed from burning fuel oil includes a first (28) and a second (30) stage. Contained within each stage is a duct burner (18) that heats gas flowing through the heat exchanger by burning fuel having vanadium and a cooling component that cools gas heated by the duct burner. Within each stage the temperature of the gas is maintained about below the melting point of vanadium complexes. Consequently, the vanadium complexes do not achieve their corrosive molten state. This invention also includes a method for burning fuel oil containing vanadium and preventing the melting of vanadium complexes by heating and cooling the gas in a plurality of stages.