초록 ▼

A cryogenic rectification system wherein feed air is turboexpanded to generate refrigeration through two turboexpanders operating at the same inlet pressure but at different inlet temperatures enabling the turboexpanders to efficiently drive the compressor or compressors which compress the feed air

A cryogenic rectification system wherein feed air is turboexpanded to generate refrigeration through two turboexpanders operating at the same inlet pressure but at different inlet temperatures enabling the turboexpanders to efficiently drive the compressor or compressors which compress the feed air to the single expansion pressure.

대표청구항 ▼

[ I claim:] [1.] A method for the cryogenic separation of air comprising:(A) compressing feed air to an expansion pressure to produce expansion pressure feed air;(B) cooling a first portion of the expansion pressure feed air to a first temperature, turboexpanding the cooled first portion, and passin

[ I claim:] [1.] A method for the cryogenic separation of air comprising:(A) compressing feed air to an expansion pressure to produce expansion pressure feed air;(B) cooling a first portion of the expansion pressure feed air to a first temperature, turboexpanding the cooled first portion, and passing the turboexpanded first portion into a cryogenic air separation plant;(C) cooling a second portion of the expansion pressure feed air to a second temperature which is lower than said first temperature, turboexpanding the cooled second portion, and passing the turboexpanded second portion into the cryogenic air separation plant wherein shaft work from the expansion of the first portion and the second portion of the feed air is used to compress the feed air to the expansion pressure;(D) separating the feed air by cryogenic rectification within the cryogenic air separation plant to produce product; and(E) recovering product from the cryogenic air separation plant.