| CPC F17C 9/02 (2013.01) | 5 Claims |
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1. A method for cryogenic vaporization comprising the steps of:
receiving a sub-cooled liquid cryogen from an air separation plant;
heating the sub-cooled liquid cryogen from the air separation plant via direct heat exchange in a thermal storage unit to produce a liquid cryogen;
receiving the liquid cryogen at a first heat exchanger;
vaporizing the liquid cryogen via indirect heat exchange in the first heat exchanger against a superheated cryogenic vapor to output a cryogenic vapor at a first temperature;
receiving the cryogenic vapor at the first temperature at a second heat exchanger;
heating the cryogenic vapor at the first temperature via indirect heat exchange in the second heat exchanger to yield the superheated cryogenic vapor at a second temperature;
recirculating the superheated cryogenic vapor at the second temperature to the first heat exchanger;
cooling the superheated cryogenic vapor at the second temperature in the first heat exchanger to yield a cryogenic vapor at a third temperature that is colder than the superheated cryogenic vapor at the second temperature;
receiving the cryogenic vapor at the third temperature at a third heat exchanger;
heating the cryogenic vapor at the third temperature via indirect heat exchange in the third heat exchanger to yield a cryogenic vapor at a fourth temperature; and
outputting, from the third heat exchanger, the cryogenic vapor at the fourth temperature to an end-user and wherein the cryogenic vapor at the fourth temperature originated from the air separation plant;
wherein the second heat exchanger and the third heat exchanger are substantially free of ice formation.
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