Liquefied natural gas refrigeration transfer to a cryogenics air

Details Liquefied natural gas refrigeration transfer to a cryogenics air Liquefied natural gas refrigeration transfer to a cryogenics air

1991-04-26

1992-08-11

Bennet, Henry A.

Refrigeration

Processes

Circulating external gas

62 8, 62 9, 62 13, 62 30, 62 40, F25J 302, F25J 100

Patent

active

051375583

ABSTRACT:
The present invention relates to a process for the liquefaction of a nitrogen stream produced by separating air components using the combination of cryogenic distillation with improved refrigeration. Very cold liquid natural gas (LNG) is employed as refrigerant, with the LNG concurrently being revaporized for transportation. The requisite circulating liquid is produced by compressing the nitrogen feed streams in a multi-stage compressor, wherein the interstage cooling is provided by heat exchange against the part of the recirculating nitrogen stream yielding a high pressure nitrogen stream. The resulting nitrogen, having a pressure greater than that of the LNG refrigerant, is then used as the circulating fluid to transfer refrigeration from the LNG to other low pressure nitrogen feed streams prior to their cold compression. Also, high pressure nitrogen is used as circulating fluid to transfer refrigeration to precool feed air to cryogenic temperatures prior to its compression in an air separation unit. A portion of the high pressure nitrogen is condensed against vaporizing LNG, followed by reducing the pressure of the condensed, high pressure nitrogen stream, producing a two phase nitrogen stream, which is phase separated into a liquid nitrogen product.

REFERENCES:
patent: 4211544 (1980-07-01), Springmann
patent: 4437312 (1984-03-01), Newton et al.
patent: 4582519 (1986-04-01), Someya et al.
patent: 4638639 (1987-01-01), Marshall et al.
patent: 4894076 (1990-01-01), Dobracki et al.

Affiliated with

Also associated with

Rating

Liquefied natural gas refrigeration transfer to a cryogenics air does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Liquefied natural gas refrigeration transfer to a cryogenics air, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Liquefied natural gas refrigeration transfer to a cryogenics air will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-343901