Methods and systems for optimizing argon recovery in an air...

Details Methods and systems for optimizing argon recovery in an air... Methods and systems for optimizing argon recovery in an air...

2007-04-17

2007-04-17

Tyler, Cheryl (Department: 3744)

Refrigeration

Cryogenic treatment of gas or gas mixture

Separation of gas mixture

C062S924000

Reexamination Certificate

active

10776346

ABSTRACT:
A cryogenic air separation system that optimizes the recovery of argon includes an air intake, a high-pressure distillation column, a low-pressure distillation column, a crude argon distillation column, and a controller that automatically controls the composition of the raw argon stream to decrease the concentration of oxygen in the stream while preventing the concentration of nitrogen in the crude argon stream from exceeding a selected value. In addition, the controller also controls the composition of the crude argon stream until an oxygen concentration of the crude argon stream reaches a selected value. The controller may include a multivariable predictive controller.

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