US 12,259,136 B2
Systems and methods for operation of a flexible fuel combustor
Xijia Lu, Durham, NC (US); Jeremy Eron Fetvedt, Raleigh, NC (US); and Peter Michael McGroddy, Durham, NC (US)
Assigned to 8 Rivers Capital, LLC, Durham, NC (US)
Filed by 8 Rivers Capital, LLC, Durham, NC (US)
Filed on Aug. 8, 2023, as Appl. No. 18/231,384.
Application 18/231,384 is a continuation of application No. 17/525,314, filed on Nov. 12, 2021, granted, now 11,828,468.
Application 17/525,314 is a continuation of application No. 15/869,552, filed on Jan. 12, 2018, granted, now 11,199,327, issued on Dec. 14, 2021.
Claims priority of provisional application 62/467,924, filed on Mar. 7, 2017.
Prior Publication US 2023/0383950 A1, Nov. 30, 2023
Int. Cl. F02C 3/30 (2006.01); F02C 3/20 (2006.01); F02C 9/28 (2006.01); F02C 9/40 (2006.01); F23C 1/00 (2006.01); F23D 14/32 (2006.01); F23K 5/00 (2006.01); F23L 7/00 (2006.01); F23N 1/00 (2006.01); F23N 1/02 (2006.01); F23N 3/00 (2006.01); F23N 5/24 (2006.01); F23N 5/26 (2006.01); F23R 3/36 (2006.01)
CPC F23R 3/36 (2013.01) [F02C 3/20 (2013.01); F02C 3/30 (2013.01); F02C 9/28 (2013.01); F02C 9/40 (2013.01); F23C 1/00 (2013.01); F23D 14/32 (2013.01); F23K 5/007 (2013.01); F23L 7/007 (2013.01); F23N 1/00 (2013.01); F23N 1/02 (2013.01); F23N 3/00 (2013.01); F23N 5/24 (2013.01); F23N 5/26 (2013.01); F05D 2270/303 (2013.01); F23C 2700/04 (2013.01); F23C 2900/99011 (2013.01); F23K 2900/05004 (2013.01); F23L 2900/07001 (2013.01); F23L 2900/07003 (2013.01); F23L 2900/07005 (2013.01); F23L 2900/07006 (2013.01); F23L 2900/07007 (2013.01); F23N 2221/06 (2020.01); F23N 2221/08 (2020.01); F23N 2237/08 (2020.01); F23N 2241/20 (2020.01); F23R 2900/00002 (2013.01); Y02E 20/32 (2013.01); Y02E 20/34 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for normalizing combustion in a power production process, the method comprising:
inputting to a combustor each of:
a) a modified heating value fuel that is a mixture of carbon dioxide and a variable fuel that is subject to compositional changes during the power production process;
b) a mixture of carbon dioxide and an oxidant; and
c) a diluent comprising additional carbon dioxide;
operating the combustor so that the variable fuel in the modified heating value fuel is combusted with the oxidant in the mixture of the carbon dioxide and the oxidant to provide a combustor exhaust stream;
passing the combustor exhaust stream through a turbine to generate power; and
implementing, in response to receiving one or more inputs indicative of a compositional change to the variable fuel, at least one control function effective to account for the compositional change to the variable fuel so that combustion is normalized, said at least one control function comprising varying a flow rate into the combustor of one or more of the modified heating value fuel, the mixture of the carbon dioxide and the oxidant, and the diluent and varying a temperature of one or both of the mixture of the carbon dioxide and the oxidant, and the diluent;
wherein normalization of combustion is defined in that one or more of fuel heating value, combustion pressure, mass flow out of the combustor, turbine inlet flow chemistry, and turbine speed varies from a predetermined value by no greater than 10%.