Patent ID: 11885266
Assignee: J. RAY MCDERMOTT, S.A.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 12:
13. A method of operating a plant system, comprising:
separating nitrogen from a supply of air to generate oxygen;
supplying the oxygen to a fuel mixture in a fuel feed line;
expanding an exhaust flow from one or more heaters of the plant system in a first expansion turbine;
cooling the exhaust flow in a first flow path of a first heat exchanger unit;
separating a liquid composition of the exhaust flow from a gas composition of the exhaust flow, the liquid composition of the exhaust flow comprising water and the gas composition of the exhaust flow comprising steam and CO2;
supplying the gas composition of the exhaust flow to the fuel mixture in the fuel feed line;
heating the liquid composition in a second flow path of the first heat exchanger unit to generate a high pressure steam;
expanding the high pressure steam in a second expansion turbine to generate a medium pressure steam;
supplying the medium pressure steam to the fuel mixture in the fuel feed line; and
feeding the fuel mixture to the one or more heaters to combust the fuel mixture.