Steam cycle methods, systems, and apparatus for efficiently reducing carbon footprints in plant systems
AssigneeJ. Ray McDermott, S.A.
InventorsVenkata Krishnan Ramanujam, Srinivas Rajabahadur Arcot, Venkata Appala Nuti
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Abstract
Aspects of the present disclosure relate to steam cycle methods, systems, and apparatus for efficiently reducing carbon footprints in plant systems. In one aspect, a cycle is conducted in a plant system to collect CO2. In one aspect, a cycle is conducted in a plant system to recycle energy. The plant system includes one or more of a power production system, a refining system, and/or a petrochemical processing system.
Claims20
A steam cycle system for plant systems, comprising:
- a fuel feed line to supply a fuel mixture to one or more pieces of equipment of a plant system;
- a first expansion turbine to couple to an exhaust line of the one or more pieces of equipment;
- a first separator comprising:
- an inlet,
- a lower outlet coupled to a water feed line, and
- an upper outlet coupled to the fuel feed line;
- and
- a first heat exchanger unit comprising:
- a first heat exchanger inlet line coupled to the first expansion turbine,
- a first heat exchanger outlet line coupled to the inlet of the first separator,
- a second heat exchanger inlet line coupled to the water feed line, and
- a second heat exchanger outlet line coupled to the fuel feed line.
A steam cycle system for plant systems, comprising:
- a fuel feed line to supply a fuel mixture to one or more pieces of equipment of a plant system;
- a first expansion turbine to couple to an exhaust line of the one or more pieces of equipment;
- a first separator comprising:
- an inlet,
- a lower outlet coupled to a water feed line, and
- an upper outlet coupled to the fuel feed line, the upper outlet of the first separator coupled to the fuel feed line through a compressor coupled to a fuel inlet line;
- and
- a first heat exchanger unit comprising:
- a first heat exchanger inlet line coupled to the first expansion turbine, wherein a side outlet line is coupled between the fuel feed line and the first heat exchanger inlet line,
- a first heat exchanger outlet line coupled to the inlet of the first separator,
- a second heat exchanger inlet line coupled to the water feed line, and
- a second heat exchanger outlet line coupled to the fuel feed line.
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.
Dependencies are inferred from the claim text.