公开(公告)号：EP0046367B1

公开(公告)日：1985-03-27

申请号：EP81303667.0

申请日：1981-08-12

申请人： Yearout, James David

发明人： Yearout, James David

IPC分类号： F25J3/04 ,  F25J5/00

CPC分类号： F25J3/04206 ,  F25J3/0429 ,  F25J3/04296 ,  F25J3/04309 ,  F25J3/04393 ,  F25J3/0463 ,  F25J2200/04 ,  F25J2205/24 ,  F25J2245/40 ,  F25J2250/40 ,  F25J2250/50 ,  F25J2290/10 ,  Y10S62/908

公开(公告)号：EP0046366A3

公开(公告)日：1982-03-10

申请号：EP81303666

申请日：1981-08-12

申请人： Yearout, James David

发明人： Yearout, James David

IPC分类号： F25J03/04 ,  F25J05/00

CPC分类号： F25J3/04284 ,  F25J3/0429 ,  F25J3/04393 ,  F25J3/04624 ,  F25J2200/02 ,  F25J2245/40 ,  F25J2270/02 ,  F25J2290/10 ,  Y10S62/908

摘要： Production of nitrogen from air, by compressing air to relatively low pressure, e.g. to about 3 atmospheres, and passing the compressed feed air to alternate passages of a reversing heat exchanger in heat exchange relation with an oxygen-rich waste stream, whereby water vapour and C0 2 in the feed air are frozen on the surface of the heat exchange passage. By reversing the flow streams the low pressure oxygen-rich waste stream now flows through the feed air passage. This causes sublimation or evaporation of the C0 2 and water vapour. A portion of the feed air is withdrawn at an intermediate point in the exchanger and is expanded in a turbine. The cooled feed air withdrawn from the heat exchanger is fed to a non-adiabatic fractionating device, whereby oxygen-rich liquid is condensed and withdrawn, and nitrogen is removed as overhead. The oxygen-rich liquid is mixed with the portion of feed air discharged from the turbine, and such mixture, the nitrogen overhead are passed through the fractionating system in heat exchange relation with and countercurrent to the feed air being separated in the fractionation zone. The waste oxygen-rich stream exiting the heat exchange passage of the fractionating zone is passed through one of the reversing passages of the reversing heat exchanger, the fractionation being carried out so that there is only about a 3°R temperature difference between the waste oxygen-rich stream and the feed air at the cold end of the reversing heat exchanger. The nitrogen product is passed through a separate passage of the reversing heat exchanger also in countercurrent heat exchange relation with the feed air.

公开(公告)号：EP0046366B1

公开(公告)日：1985-03-20

申请号：EP81303666.2

申请日：1981-08-12

申请人： Yearout, James David

发明人： Yearout, James David

IPC分类号： F25J3/04 ,  F25J5/00

CPC分类号： F25J3/04284 ,  F25J3/0429 ,  F25J3/04393 ,  F25J3/04624 ,  F25J2200/02 ,  F25J2245/40 ,  F25J2270/02 ,  F25J2290/10 ,  Y10S62/908

公开(公告)号：EP0046367A3

公开(公告)日：1982-03-10

申请号：EP81303667

申请日：1981-08-12

申请人： Yearout, James David

发明人： Yearout, James David

IPC分类号： F25J03/04 ,  F25J05/00

CPC分类号： F25J3/04206 ,  F25J3/0429 ,  F25J3/04296 ,  F25J3/04309 ,  F25J3/04393 ,  F25J3/0463 ,  F25J2200/04 ,  F25J2205/24 ,  F25J2245/40 ,  F25J2250/40 ,  F25J2250/50 ,  F25J2290/10 ,  Y10S62/908

摘要： Production of oxygen from air, by compressing air to relatively low pressure, e.g. to about 3 atmospheres, and passing the compressed feed air to alternate passages of a reversing heat exchanger in heat exchange relation with a nitrogen waste stream, whereby water vapour and C0 2 in the feed air are frozen on the surface of the heat exchange passage. By reversing the flow streams the low pressure nitrogen waste stream now flows through the feed air passage. This causes sublimation or evaporation of the C0 2 and water vapour. A portion of the feed air is withdrawn at an intermediate point in the exchanger and is further cooled in a heat exchange passage in the lower portion of a non-adiabatic fractionating device. The cooled feed air withdrawn from the heat exchanger is partly condensed by evaporating oxygen liquid product, and is fed to the partial condensing zone of the fractionating device, whereby oxygen-rich liquid is condensed and withdrawn, and nitrogen is removed as overhead. The nitrogen is expanded in a turbine and is passed in countercurrent heat exchange relation to the partial condensing zone, thereby providing refrigeration to the system. The oxygen-rich liquid is reduced in pressure, e.g. to about 1 atmosphere, and is fed to the partial evaporation zone of the fractionating device whereby nitrogen-rich vapour is removed as overhead, and oxygen of about 95% purity is removed as a liquid. The waste nitrogen stream exiting the heat exchange passage of the fractionating zone is passed through one of the reversing passages of the reversing heat exchang - er, the fractionation being carried out so that there is only about a 3 o R temperature difference between the nitrogen waste stream and the feed air at the cold end of the reversing exchanger. The oxygen product is passed through a separate passage of the reversing exchanger also in countercurrent heat exchange relation with the feed air.

公开(公告)号：EP0046367A2

公开(公告)日：1982-02-24

申请号：EP81303667.0

申请日：1981-08-12

申请人： Yearout, James David

发明人： Yearout, James David

IPC分类号： F25J3/04 ,  F25J5/00

CPC分类号： F25J3/04206 ,  F25J3/0429 ,  F25J3/04296 ,  F25J3/04309 ,  F25J3/04393 ,  F25J3/0463 ,  F25J2200/04 ,  F25J2205/24 ,  F25J2245/40 ,  F25J2250/40 ,  F25J2250/50 ,  F25J2290/10 ,  Y10S62/908

摘要： Production of oxygen from air, by compressing air to relatively low pressure, e.g. to about 3 atmospheres, and passing the compressed feed air to alternate passages of a reversing heat exchanger in heat exchange relation with a nitrogen waste stream, whereby water vapour and C0 2 in the feed air are frozen on the surface of the heat exchange passage. By reversing the flow streams the low pressure nitrogen waste stream now flows through the feed air passage. This causes sublimation or evaporation of the C0 2 and water vapour. A portion of the feed air is withdrawn at an intermediate point in the exchanger and is further cooled in a heat exchange passage in the lower portion of a non-adiabatic fractionating device. The cooled feed air withdrawn from the heat exchanger is partly condensed by evaporating oxygen liquid product, and is fed to the partial condensing zone of the fractionating device, whereby oxygen-rich liquid is condensed and withdrawn, and nitrogen is removed as overhead. The nitrogen is expanded in a turbine and is passed in countercurrent heat exchange relation to the partial condensing zone, thereby providing refrigeration to the system. The oxygen-rich liquid is reduced in pressure, e.g. to about 1 atmosphere, and is fed to the partial evaporation zone of the fractionating device whereby nitrogen-rich vapour is removed as overhead, and oxygen of about 95% purity is removed as a liquid. The waste nitrogen stream exiting the heat exchange passage of the fractionating zone is passed through one of the reversing passages of the reversing heat exchang - er, the fractionation being carried out so that there is only about a 3 o R temperature difference between the nitrogen waste stream and the feed air at the cold end of the reversing exchanger. The oxygen product is passed through a separate passage of the reversing exchanger also in countercurrent heat exchange relation with the feed air.

公开(公告)号：EP0046366A2

公开(公告)日：1982-02-24

申请号：EP81303666.2

申请日：1981-08-12

申请人： Yearout, James David

发明人： Yearout, James David

IPC分类号： F25J3/04 ,  F25J5/00

CPC分类号： F25J3/04284 ,  F25J3/0429 ,  F25J3/04393 ,  F25J3/04624 ,  F25J2200/02 ,  F25J2245/40 ,  F25J2270/02 ,  F25J2290/10 ,  Y10S62/908

摘要： Production of nitrogen from air, by compressing air to relatively low pressure, e.g. to about 3 atmospheres, and passing the compressed feed air to alternate passages of a reversing heat exchanger in heat exchange relation with an oxygen-rich waste stream, whereby water vapour and C0 2 in the feed air are frozen on the surface of the heat exchange passage. By reversing the flow streams the low pressure oxygen-rich waste stream now flows through the feed air passage. This causes sublimation or evaporation of the C0 2 and water vapour. A portion of the feed air is withdrawn at an intermediate point in the exchanger and is expanded in a turbine. The cooled feed air withdrawn from the heat exchanger is fed to a non-adiabatic fractionating device, whereby oxygen-rich liquid is condensed and withdrawn, and nitrogen is removed as overhead. The oxygen-rich liquid is mixed with the portion of feed air discharged from the turbine, and such mixture, the nitrogen overhead are passed through the fractionating system in heat exchange relation with and countercurrent to the feed air being separated in the fractionation zone. The waste oxygen-rich stream exiting the heat exchange passage of the fractionating zone is passed through one of the reversing passages of the reversing heat exchanger, the fractionation being carried out so that there is only about a 3°R temperature difference between the waste oxygen-rich stream and the feed air at the cold end of the reversing heat exchanger. The nitrogen product is passed through a separate passage of the reversing heat exchanger also in countercurrent heat exchange relation with the feed air.