Process and apparatus for the generation of power
AssigneeAir Products and Chemicals, Inc.
InventorsRodney John Allam, Rebecca Cotton
Life of this patent
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Abstract
A process for generating power from the expansion of steam in a steam turbine system. The steam is generated by at least partially vaporizing pre-heated water by heat exchange against a first fuel gas that is generated exothermically. The at least partially vaporized water is then heated to produce the steam by heat exchange against expanded combustion product gas that is generated by the combustion of a second fuel gas in the presence of compressed oxygen-containing gas and the subsequent expansion of the combustion product gas. The steam is then expanded in a steam turbine system having more than one pressure stage to produce power and an expanded steam stream.
Claims17
A process for generating power comprising:
- generating exothermically a first fuel gas;
- compressing an oxidant gas to produce compressed oxidant gas;
- combusting a second fuel gas in the presence of at least a portion of said compressed oxidant gas to produce combustion product gas, wherein the second fuel gas comprises at least a portion of the first fuel gas or a gas derived therefrom;
- expanding at least a portion of said combustion product gas to produce expanded combustion product gas;
- at least partially vaporizing pre-heated water by heat exchange against at least a portion of said first fuel gas to produce an at least partially vaporized water stream;
- heating said at least partially vaporized water stream by heat exchange against expanded combustion product gas to produce a heated first steam stream at a pressure of from 10 MPa (100 atm.) to 20 MPa (200 atm.);
- and
- expanding said heated first steam stream in the highest pressure stage of a steam turbine system having more than one pressure stage to generate power and an expanded steam stream.
A process for generating power comprising:
- generating exothermically synthesis gas;
- compressing a gas containing molecular oxygen to produce compressed oxidant gas;
- combusting hydrogen in the presence of at least a portion of said compressed oxidant gas to produce combustion product gas;
- expanding at least a portion of said combustion product gas to produce expanded combustion product gas;
- at least partially vaporising pre-heated water by heat exchange against at least a portion of said synthesis gas to produce an at least partially vaporized water stream;
- heating said at least partially vaporized water stream by heat exchange against expanded combustion product gas to produce a heated first steam stream at a pressure of from 10 MPa (100 atm.) to 20 MPa (200 atm.);
- feeding said heated first steam stream to a steam turbine system having three pressure stages;
- and
- expanding said heated first steam stream in the highest pressure stage of the steam turbine system to generate power and an expanded steam stream.
Apparatus for carrying out a process for generating power, said apparatus comprising:
- a reactor system for generating exothermically a first fuel gas;
- compressing means for compressing an oxidant gas to produce a compressed oxidant gas;
- combusting means for combusting a second fuel gas in the presence of said compressed oxidant gas to produce combustion product gas;
- expanding means for expanding at least a portion of said combustion product gas to produce expanded combustion product gas;
- first heat exchange means for at least partially vaporizing pre-heated water against at least a portion of said first fuel gas to produce an at least partially vaporized water stream;
- conduit means for carrying a stream of said first fuel gas from the reactor system to the first heat exchange means;
- second heat exchange means for heating the at least partially vaporized water stream by heat exchange against expanded combustion product gas to produce a heated first steam stream at a pressure of from 10 MPa (100 atm.) to 20 MPa (200 atm.);
- conduit means for carrying expanded combustion product gas from the expanding means to the second heat exchange means;
- conduit means for carrying said at least partially vaporized water stream from the first heat exchange means to the second heat exchange means;
- a steam turbine system having more than one pressure stage for expanding said heated first steam stream to produce an expanded steam stream;
- and
- conduit means for carrying said heated first steam stream from the second heat exchange means to the highest pressure stage of said steam turbine system.
Dependencies are inferred from the claim text.