Ambient air vaporizer

摘要

Contemplated systems and methods employ a portion of vaporized and heated LNG as a defrosting medium in an LNG ambient air vaporizer. Most preferably, the LNG is heated to a temperature of about 100° F. to 400° F., and is after defrosting fed back to the LNG stream at a position that is upstream and/or downstream of the vaporizer or to the natural gas delivery pipeline.

主权项

1. An LNG regasification system, comprising:
an LNG source configured to provide LNG to first and second ambient air vaporizers, wherein the first and second ambient air vaporizers are configured to provide vaporized LNG; a heater fluidly coupled to the first and second ambient air vaporizers, wherein the heater is configured to receive and heat a portion of the vaporized LNG to a temperature at or above ambient temperature to thereby form a heated vaporized LNG; wherein first and second ambient air vaporizers are further thermally coupled to respective first and second defrosting conduits that are configured receive at least a portion of the heated vaporized LNG to thereby allow defrosting of the first and second ambient air vaporizers and to thereby form chilled vaporized LNG; first and second recycle conduits fluidly coupled to the first and second defrosting conduits and configured to feed at least a portion of the chilled vaporized LNG to a conduit transporting the vaporized LNG and a conduit transporting the LNG; and a third recycle conduit fluidly coupled to the defrosting conduits and configured to allow a combination of another portion of the chilled vaporized LNG with the heated vaporized LNG.