Sacrificial cryogen gas liquefaction system

A method for liquefying a cryogenic gas with free cold from vaporizing a cryogenic liquid comprising the steps of:

• a. providing a heat exchanger, a purifier having an absorbent wherein the purifier is adapted to receive the feed of cryogenic gas to be liquified, a destination tank and a process system;
• b. purifying the cryogenic gas in the purifier;
• c. directing the cryogenic gas to the heat exchanger;
• d. transferring the cryogenic liquid to the heat exchanger;
• e. warming the cryogenic liquid in the heat exchanger with heat from the cryogenic gas so that the cryogenic liquid is vaporized into a resulting gas and the cryogenic gas is liquefied with the free cold into a resulting liquid;
• f. filling the destination tank with the resulting liquid;
• and
• g. directing the resulting gas to the process system.

A system for liquefying a cryogenic gas using free cold from a cryogenic liquid, where the free cold would otherwise be wasted when the cryogenic liquid is vaporized, comprising:

• a. an insulated source tank containing a supply of the cryogenic liquid;
• b. a heat exchanger having a gas inlet, a liquid outlet, a liquid inlet and a gas outlet where the gas inlet is adapted to receive a feed of the cryogenic gas and the liquid inlet is in communication with the source tank;
• c. means for transferring cryogenic liquid in circuit between said source tank and the liquid inlet of said heat exchanger;
• d. an insulated destination tank in communication with the liquid outlet of said heat exchanger;
• e. a process system in communication with the gas outlet of said heat exchanger;
• and
• f. a purifier in communication with the gas inlet of the heat exchanger, said purifier containing an absorbent and adapted to receive the feed of the cryogenic gas that is to be liquefied;
• whereby cryogenic liquid from said source tank flows to said heat exchanger when said means for transferring cryogenic liquid is activated and cryogenic gas from the feed flows to said heat exchanger so that the cryogenic liquid is vaporized in the heat exchanger by heat from the cryogenic gas and the cryogenic gas is liquified in the heat exchanger by the free cold from the cryogenic liquid and a resulting vaporized cryogen flows to the process system and a resulting liquefied cryogenic gas flows to the destination tank.

A method for liquefying a cryogenic gas with free cold from vaporizing a cryogenic liquid comprising the steps of:

• a. providing a heat exchanger, a purifier, a destination tank and a process system;
• b. purifying the cryogenic gas in the purifier;
• c. directing the cryogenic gas to the heat exchanger;
• d. transferring the cryogenic liquid that is provided in a source tank with a head space containing cryogenic vapor to the heat exchanger;
• e. warming the cryogenic liquid in the heat exchanger with heat from the cryogenic gas so that the cryogenic liquid is vaporized into a resulting gas and the cryogenic gas is liquefied with the free cold into a resulting liquid;
• f. filling the destination tank with the resulting liquid;
• g. directing the resulting gas to the process system;
• and
• h. flushing the purifier with the cryogenic vapor from the head space of the source tank.

A method for liquefying a cryogenic gas with free cold from vaporizing a cryogenic liquid comprising the steps of:

• a. providing a heat exchanger, a purifier, a destination tank and a process system;
• b. purifying the cryogenic gas in the purifier;
• c. directing the cryogenic gas to the heat exchanger;
• d. transferring the cryogenic liquid to the heat exchanger;
• e. warming the cryogenic liquid in the heat exchanger with heat from the cryogenic gas so that the cryogenic liquid is vaporized into a resulting gas and the cryogenic gas is liquefied with the free cold into a resulting liquid;
• f. filling the destination tank with the resulting liquid;
• g. directing the resulting gas to the process system;
• and
• h. pulling a vacuum on the purifier.