Method of producing gaseous oxygen at variable rate

Details Method of producing gaseous oxygen at variable rate Method of producing gaseous oxygen at variable rate

1997-04-30

1998-07-14

Capossela, Ronald C.

Refrigeration

Cryogenic treatment of gas or gas mixture

Separation of gas mixture

364501, F25J 300

Patent

active

057787000

ABSTRACT:
A method of producing gaseous oxygen in accordance with a variable demand cycle in which pumped liquid oxygen from a double column air separation unit is vaporized within a mixing column. During low demand phases, excess liquid oxygen is stored within a storage tank and used to augment the liquid oxygen to vaporized during the high demand phase. Reflux to the lower pressure column of the air separation unit is kept constant by storing liquid with column bottoms produced within the mixing column during the high demand phase for use in the low demand phase when less liquid oxygen is vaporized and therefore less column bottoms is produced in the mixing column.

REFERENCES:
patent: 5084081 (1992-01-01), Rohde
patent: 5355680 (1994-10-01), Darredeau et al.
patent: 5406800 (1995-04-01), Bonaquist
patent: 5431023 (1995-07-01), Howard et al.

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