FURNACE SYSTEM WITH INTERNAL FLUE GAS RECIRCULATION

摘要

PROBLEM TO BE SOLVED: To regulate furnace temperatures and steam conditions within a predetermined range.SOLUTION: A furnace system 10 includes a combustion vessel 12 having an outlet end 19 and at least one aperture 20 extending into an interior area 14 defined by the combustion vessel 12. The furnace system 10 includes a flue duct 42 coupled to the outlet end 19 and in fluid communication with the interior area 14. A recirculation duct 55 extends from the flue duct 42 to one or more of the apertures 20, 22 and provides fluid communication between the flue duct 42 and the interior area 14.