摘要:
A compressed air stream is cooled in an exchanger to form a compressed cooled air stream. The stream is then cryogenically compressed in a first compressor to form a first pressurized gas stream. The first pressurized gas stream is further cooled in the exchanger, cryogenically compressed in a second compressor, and then it is cooled and partially liquefied. The cooled and partially liquefied product is then fed to a system of distillation columns. A liquid product is removed from the system of distillation columns. This product is then pressurized, vaporized and warmed in the exchanger to yield pressurized gaseous product.
摘要:
A cryogenic air separation method and apparatus in which first (68) and second (64) liquid streams are produced. The first liquid stream (68) has a higher oxygen content than air and can consist of a higher pressure distillation column bottoms and the second liquid stream (64), for instance, air, has a lower oxygen content than the first liquid stream and an argon content no less than the air. The second liquid stream (64) is subcooled through indirect heat exchange (118) with the first liquid stream (138) and both of such streams are introduced into the lower pressure column (30). The second liquid stream (152) is introduced into the lower pressure column (30) above that point at which the crude liquid oxygen column bottoms or any portion thereof (140,146,148) is introduced into the lower pressure column to increase a liquid to vapor ratio below the introduction of the second liquid stream and therefore, reduce the oxygen present within the column overhead (94).
摘要:
A compressed air stream is cooled in an exchanger to form a compressed cooled air stream. The stream is then cryogenically compressed in a first compressor to form a first pressurized gas stream. The first pressurized gas stream is further cooled in the exchanger, cryogenically compressed in a second compressor, and then it is cooled and partially liquefied. The cooled and partially liquefied product is then fed to a system of distillation columns. A liquid product is removed from the system of distillation columns. This product is then pressurized, vaporized and warmed in the exchanger to yield pressurized gaseous product.
摘要:
A cryogenic air separation method and apparatus in which first (68) and second (64) liquid streams are produced. The first liquid stream (68) has a higher oxygen content than air and can consist of a higher pressure distillation column bottoms and the second liquid stream (64), for instance, air, has a lower oxygen content than the first liquid stream and an argon content no less than the air. The second liquid stream (64) is subcooled through indirect heat exchange (118) with the first liquid stream (138) and both of such streams are introduced into the lower pressure column (30). The second liquid stream (152) is introduced into the lower pressure column (30) above that point at which the crude liquid oxygen column bottoms or any portion thereof (140,146,148) is introduced into the lower pressure column to increase a liquid to vapor ratio below the introduction of the second liquid stream and therefore, reduce the oxygen present within the column overhead (94).
摘要:
A cryogenic air separation method and apparatus in which first (68) and second (64) liquid streams are produced. The first liquid stream (68) has a higher oxygen content than air and can consist of a higher pressure distillation column bottoms and the second liquid stream (64), for instance, air, has a lower oxygen content than the first liquid stream and an argon content no less than the air. The second liquid stream (64) is subcooled through indirect heat exchange (118) with the first liquid stream (138) and both of such streams are introduced into the lower pressure column (30). The second liquid stream (152) is introduced into the lower pressure column (30) above that point at which the crude liquid oxygen column bottoms or any portion thereof (140,146,148) is introduced into the lower pressure column to increase a liquid to vapor ratio below the introduction of the second liquid stream and therefore, reduce the oxygen present within the column overhead (94).
摘要:
An apparatus for separating air by cryogenic distillation comprises N air compressors (C1, C2, C3), which are connected so that they receive air at ambient pressure and which are designed to produce air at a first pressure higher than 12 bar abs, N being at least equal to 3, each of the compressors being driven by a single asynchronous motor (M1, M2, M3), the total power of the compressors being at least equal to 10 MW.