Cogeneration system with low NO.sub.x combustion of fuel gas
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United States of America Patent
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Jun 25, 1991
Grant Date -
N/A
app pub date -
Jul 16, 1990
filing date -
Jul 16, 1990
priority date (Note) -
Expired
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Abstract
Cogeneration of at least electricity and refrigeration with low NO.sub.x combustion of fuel gas supplied at high pressure involves expanding the gas, after preheating, in a turbo-expander which drives a centrifugal compressor for the refrigerant vapor of a refrigeration system. The expanded fuel gas admixed with a limited amount of air is fed to a porous fiber burner to effect flameless combustion on the outer surface of the burner and yield a flue gas with a very low content of NO.sub.x and other pollutants. Combustion heat is used to produce high-pressure steam which is fed to a steam turbine that drives an electric generator. The flue gas can be passed through an absorption system for the recovery of carbon dioxide, part of the steam being utilized in the absorption system. When desired, recovered carbon dioxide can be liquefied with refrigeration produced by the cogeneration system.
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