公开(公告)号：EP4390281A1

公开(公告)日：2024-06-26

申请号：EP22020618.9

申请日：2022-12-20

申请人： Linde GmbH

发明人： Kunz, Christian ,  Kirchner, Lars

IPC分类号： F25J3/04

CPC分类号： F25J3/0409 ,  F25J3/04224 ,  F25J3/04357 ,  F25J3/04412 ,  F25J3/04678 ,  F25J3/04727 ,  F25J3/048 ,  F25J2280/0220130101

摘要： The process for producing an argon-enriched fraction by cryogenic air separation comprises
- introducing feed air into a distillation system for oxygen-nitrogen separation comprising a low-pressure column,
- withdrawing an argon-containing fraction from the low-pressure column and introducing it into a crude argon column having a crude argon top condenser being indirectly cooled by a cryogenic working fluid,
- withdrawing an argon-enriched fraction from an upper section of the crude argon column,
- measuring the oxygen content in the argon-containing fraction,
characterized in that
- measuring the nitrogen content in the argon-containing fraction,
- predicting the nitrogen content in the crude argon condenser on the basis of the measured nitrogen content and
- controlling the operation of the crude argon column depending on such corrected estimated argon concentration depending on such predicted nitrogen content in the crude argon condenser.
A respective apparatus is claimed as well.