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A method of producing one or more products such asoxygen notrogen and argon from air and an apparat us thereof
A method of producing one or more products such asoxygen notrogen and argon from air and an apparat us thereof
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机译：一种从空气中生产一种或多种产品如氧气，氮气和氩气的方法及其设备
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摘要
A stream of air is compressed in a compressor 2 and purified in a unit 4. One stream of the resulting air is cooled in a heat exchanger 6 and is separated in an arrangement of rectification columns comprising a higher pressure rectification column 12, a lower pressure rectification column 26, and a further rectification column 34 for separating argon from an argon-enriched oxygen stream withdrawn from the lower pressure rectification column 26, said stream of resulting air is introduced into the higher pressure rectification column 12 through an inlet 14. A second cooled, compressed, purified air stream is expanded in an expansion turbine 82 and is introduced into the lower pressure rectification column 26. A third cooled, compressed, purified air stream is expanded in a second expansion turbine 88 and is introduced into the higher pressure rectification column 12. A fourth compressed, purified air stream is expanded in a third expansion turbine 88 having an outlet temperature higher than those of the other two turbines and is further cooled in the heat exchanger 6 and is introduced into the higher pressure rectification column 12. The arrangement of turbines enhances argon recovery when liquid nitrogen product is produced. IMAGE
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