System and method for generation of high pressure air in an integrated gasification combined cycle system
First Claim
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1. An integrated gasification combined cycle system, comprising:
- an ion transport membrane air separation unit for producing oxygen-enriched gas and oxygen-depleted air;
a gasification system for generating syngas from a carbonaceous fuel reacting with the oxygen-enriched gas;
a gas combustor for reacting the syngas; and
a subsystem, configured to provide a first portion of a first stream of air to the air separation unit at a first pressure and to provide a second stream of air to the combustor at a second pressure lower than the first pressure, the subsystem comprising an air turbine connected to receive a second portion of the first stream of air from which the second stream of air is provided and to deliver the second stream of compressed air to the combustor; and
an air chest for mixing the oxygen-depleted air and the second stream of air to provide an air mixture, wherein the air separation unit is configured in the system to deliver the oxygen-depleted air to the air chest.
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Abstract
An integrated gasification combined cycle system. In one embodiment (FIG. 2) a system (200) includes an ion transport membrane air separation unit (210) for producing oxygen-enriched gas (209) and oxygen-depleted air (227), a gasification system (5) for generating syngas with the oxygen-enriched gas (209), a gas combustor (234) for reacting the syngas (224), and a subsystem configured to provide a first stream of air to the combustor (234) at a first pressure and to provide a second stream of air to the air separation unit (210) at a second pressure greater than the first pressure. The subsystem includes a compressor (230) having multi-pressure outlets (203, 204).
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Citations
12 Claims
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1. An integrated gasification combined cycle system, comprising:
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an ion transport membrane air separation unit for producing oxygen-enriched gas and oxygen-depleted air; a gasification system for generating syngas from a carbonaceous fuel reacting with the oxygen-enriched gas; a gas combustor for reacting the syngas; and a subsystem, configured to provide a first portion of a first stream of air to the air separation unit at a first pressure and to provide a second stream of air to the combustor at a second pressure lower than the first pressure, the subsystem comprising an air turbine connected to receive a second portion of the first stream of air from which the second stream of air is provided and to deliver the second stream of compressed air to the combustor; and an air chest for mixing the oxygen-depleted air and the second stream of air to provide an air mixture, wherein the air separation unit is configured in the system to deliver the oxygen-depleted air to the air chest. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An integrated gasification combined cycle system, comprising:
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an ion transport membrane air separation unit for producing oxygen-enriched gas and oxygen-depleted air; a gasification system for generating syngas by reacting a carbonaceous fuel with the oxygen-enriched gas; a combustor for reacting the syngas; and a subsystem, configured to provide a first portion of a first stream of air to the air separation unit at a first pressure and to provide a second stream of air to the combustor at a second pressure lower than the first pressure, the subsystem comprising an air turbine connected to receive a second portion of the first stream of air from which the second stream of air is provided and to deliver the second stream of compressed air to the combustor. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification