Patent ID: 9243799
Filing Date: 2016-01-26
CPC Classification: F23C,F23L,F23M,Y02E

Claim Text:
1. An oxy/fuel combustion system comprising: a burner having a longitudinal axis; a furnace; and a precombustor comprising a passage extending through the precombustor, said passage adapted to receive reaction products from the burner wherein the longitudinal axis of the burner is coincident with the passage, and wherein the burner comprises at least two annular fluid apertures surrounding a central aperture so that fluid exiting the at least two surrounding fluid apertures surrounds fluid exiting the central aperture and wherein one of the apertures contains oxygen, one contains fuel, and one contains RFG; wherein the precombustor comprises a first end adjacent to an end of the burner emitting reaction products and a second end adjacent to the furnace; wherein RFG is supplied to the combustion system via a first RFG stream that flows through the precombustor and a second RFG stream that flows outside the precombustor to the furnace; wherein oxygen is supplied to the combustion system via a first oxygen stream that flows through the precombustor and a second oxygen stream that flows outside the precombustor to the furnace; wherein the combustion system further comprises a flow control system wherein the flow rates of the first and second RFG streams are varied in response to a predetermined parameter; and wherein the oxygen is an oxidizer having an oxygen concentration greater than about 30 mol %.