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US 4,445,842 AGranted
Recuperative burner with exhaust gas recirculation means
AssigneeThermal Systems Engineering, Inc.
InventorAndrew J. Syska
Life of this patent
Estimating the term…
Abstract
A recuperative burner having a recirculating conduit to direct flue gas to the combustion chamber with the air and fuel, and a compact recuperative stack with a recuperative flue gas conduit and an air passage in which air separated from the flue gas by the recuperative flue gas conduit is preheated before supplying it to the combustion chamber.
Claims8
A recuperative burner for a furnace comprising
- a housing having a combustion chamber in it,
- said combustion chamber having an outlet for communication with said furnace and an inlet for receiving air, recirculated flue gas, and fuel,
- a recuperative stack to preheat air supplied to said combustion chamber inlet to reduce fuel requirements of said burner,
- said recuperative stack having
- a recuperative flue gas conduit made of a heat conductive material and having one end for receiving flue gas from said furnace and another end for communication with the atmosphere, and
- an air passage separated from flue gas by said recuperative flue gas conduit and having an inlet for connection to a pressurized source of air and an outlet in communication with said chamber inlet,
- a fuel inlet nozzle in said housing for directing fuel to said chamber inlet, and
- a recirculating flue gas conduit with one end for receiving flue gas from said furnace and another end connected to direct recirculated flue gas to said combustion chamber at a location causing mixing of said flue gas and fuel upstream of said air outlet so as to reduce the flame temperature, thereby reducing the NO.sub.x content.
5 more elements
Dependencies are inferred from the claim text.