Systems and methods for power generation with exhaust gas recirculation
First Claim
1. A power generation system comprising:
- a gas turbine system comprising;
a combustion chamber configured to combust a fuel stream;
a compressor configured to receive a feed oxidant stream and supply a compressed oxidant to the combustion chamber; and
an expander configured to receive a discharge from the combustion chamber and generate an exhaust comprising carbon dioxide; and
a retrofittable exhaust gas recirculation system comprising;
a splitter configured to split the exhaust into a first split stream and a second split stream;
a heat recovery steam generator configured to receive the first split stream and generate a cooled first split stream; and
a purification system configured to receive the first cooled split stream and to directly receive the second split stream and generate a recycle stream, wherein the recycle stream is mixed with the fresh oxidant to generate the feed oxidant stream.
1 Assignment
0 Petitions
Accused Products
Abstract
A power generation system includes a gas turbine system. The turbine system includes a combustion chamber configured to combust a fuel stream a compressor configured to receive a feed oxidant stream and supply a compressed oxidant to the combustion chamber and an expander configured to receive a discharge from the combustion chamber and generate an exhaust comprising carbon dioxide and electrical energy. The system further includes a retrofittable exhaust gas recirculation system including a splitter configured to split the exhaust into a first split stream and a second split stream, a heat recovery steam generator configured to receive the first split stream and generate a cooled first split stream and a purification system configured to receive the first cooled split stream and the second split stream and generate a recycle stream, wherein the recycle stream is mixed with the fresh oxidant to generate the feed oxidant stream.
23 Citations
27 Claims
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1. A power generation system comprising:
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a gas turbine system comprising; a combustion chamber configured to combust a fuel stream; a compressor configured to receive a feed oxidant stream and supply a compressed oxidant to the combustion chamber; and an expander configured to receive a discharge from the combustion chamber and generate an exhaust comprising carbon dioxide; and a retrofittable exhaust gas recirculation system comprising; a splitter configured to split the exhaust into a first split stream and a second split stream; a heat recovery steam generator configured to receive the first split stream and generate a cooled first split stream; and a purification system configured to receive the first cooled split stream and to directly receive the second split stream and generate a recycle stream, wherein the recycle stream is mixed with the fresh oxidant to generate the feed oxidant stream. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A power generation system comprising:
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a gas turbine system comprising; a combustion chamber configured to combust a fuel stream; a compressor configured to receive a feed oxidant stream and supply a compressed oxidant to the combustion chamber; and an expander configured to receive a discharge from the combustion chamber and generate an exhaust comprising carbon dioxide; an exhaust gas recirculation unit comprising; a splitter configured to split the exhaust into a first split stream and a second split stream; a heat recovery steam generator configured to receive the first split stream and generate a cooled first split stream; a blower to boost pressure in the cooled first split stream; a purification system configured to receive the first cooled split stream and to directly receive the second split stream and generate a recycle stream, wherein the recycle stream is mixed with the fresh oxidant to generate the feed oxidant stream; and a first control valve and a second control valve wherein the first control valve is configured to release a portion of the cooled first exhaust and the second control valve is configured release a portion of the recycle stream. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A method of generating power with reduced NOx emission comprising:
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compressing a feed oxidant and generating a compressed oxidant in a compressor; combusting a fuel stream and the compressed oxidant in a combustion chamber and generating a discharge; expanding the discharge from the combustion chamber and generating an exhaust comprising carbon dioxide; splitting the exhaust into a first split stream and a second split stream; recovering heat from the first split stream and generating a cooled first split stream; increasing the pressure of the cooled first split stream; directly remixing the cooled first split stream and the second split stream and generating a mixed exhaust; purifying the mixed exhaust and generating a recycle stream; and mixing the recycle stream with fresh oxidant and generating the feed oxidant. - View Dependent Claims (21, 22, 23, 24, 25, 26)
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27. A method of generating power comprising:
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compressing a feed oxidant and generating a compressed oxidant in a compressor; combusting a fuel stream and the compressed oxidant in a combustion chamber and generating a discharge; expanding the discharge from the combustion chamber and generating an exhaust comprising carbon dioxide; splitting the exhaust into a first split stream and a second split stream using a coanda ejector; recovering heat from the first split stream and generating a cooled first split stream; increasing the pressure of the cooled first split stream; directly remixing the cooled first split stream and the second split stream and generating a mixed exhaust; purifying the mixed exhaust and generating a recycle stream; mixing the recycle stream with fresh oxidant and generating the feed oxidant; and releasing a portion of the cooled first exhaust through a first control valve and releasing a portion of the recycle stream through a second control valve.
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Specification