Cascade refrigeration process for liquefaction of natural gas

Details Cascade refrigeration process for liquefaction of natural gas Cascade refrigeration process for liquefaction of natural gas

1998-06-18

2000-01-25

Doerrler, William

Refrigeration

Cryogenic treatment of gas or gas mixture

Liquefaction

62613, F25J 100

Patent

active

060166657

ABSTRACT:
This invention relates to a process for liquefying a pressurized gas stream rich in methane in which the liquefication of the gas stream occurs in a heat exchanger being cooled by a cascade refrigeration system to produce a methane-rich liquid product having a temperature above about -112.degree. C. (-170.degree. F.). In this process, a pressurized gas stream is introduced into heat exchange contact with a first refrigerant cycle comprising at least one refrigeration stage whereby the temperature of the gas stream is reduced by heat exchange with a first portion of a first refrigerant to produce a cooled gas stream. The cooled gas stream is then introduced into heat exchange contact with a second refrigerant cycle comprising at least one refrigeration stage whereby the temperature of the cooled gas stream is further reduced by heat exchange with a second refrigerant to produce a liquefied methane-rich stream having a temperature above about -112.degree. C. (-170.degree. F.) and a pressure sufficient for the liquefied stream to be at or below its bubble point.

REFERENCES:
patent: 3298805 (1967-01-01), Secord et al.
patent: 3477509 (1969-11-01), Arendt
patent: 3581511 (1971-06-01), Peck
patent: 3596472 (1971-08-01), Streich
patent: 3763358 (1973-10-01), Gaumer et al.
patent: 3763658 (1973-10-01), Gaumer, Jr. et al.
patent: 3818714 (1974-06-01), Etzbach et al.
patent: 3970441 (1976-07-01), Etzbach et al.
patent: 4057972 (1977-11-01), Sarsten
patent: 4315407 (1982-02-01), Creed et al.
patent: 4430103 (1984-02-01), Gray et al.
patent: 4504296 (1985-03-01), Newton et al.
patent: 4548629 (1985-10-01), Chiu
patent: 4680041 (1987-07-01), DeLong
patent: 5199266 (1993-04-01), Johansen
patent: 5291736 (1994-03-01), Paradowski
patent: 5473900 (1995-12-01), Low
patent: 5626034 (1997-05-01), Manley et al.
patent: 5701761 (1997-12-01), Provost et al.
patent: 5746066 (1998-05-01), Manley
Bennett, C. P. Marine Transportation of LNG at Intermediate Temperature, CME (Mar. 1979), pp. 63-64.
Broeker, R. J. CNG and MLG-New Natural Gas Transportation Processes, American Gas Journal (Jul. 1969) pp.138-140.
Domain, L. LNG-Dreams and Prospects, World Petroleum (Apr. 1967), pp. 300-304.
Faridany, E. K., Ffooks R. C., and Meikle, R. B. A Pressure LNG System, European Offshore Petroleum Conference & Exhibition (Oct. 21-24, 1980), vol. EUR 171, pp. 245-254.
Faridany, E. K., Secord, H.C, O'Brien, J. V., Pritchard, J. F., and Banister, M. The Ocean Phoenix Pressure-LNG System, GASTECH 76 (1976), New York, pp. 267-280.
Fluggen, Prof. E. and Backhaus, Dr. I. H. Pressurised LNG --and the Utilisation of Small Gas Fields, GASTECH78, LNG/LPG Conference (Nov. 7, 1978), Monte Carlo pp. 195-204.
Gas Processors Association. Cryogenics, Plant Processing of Natural Gas (1974), Chapter VI, pp.79-87.
Harper, E. A., Rust, J. E., and Dean, L. E. Trouble Free LNG: A reliable, easy-to-operate liquefaction cycle eliminates many of the difficulties of LNG production., Chemical Engineering Progress (Nov. 1975), Vo. 71, No. 11, pp. 75-79.
Jackson, R. G. Today's Processes for the Liquefaction of Natural Gas, World Petroleum (Sep. 1966), pp. 52-56.
Kinard, G. E. and Gaumer, L. S. Mixed Refrigerant Cascade Cycles for LNG, Chemical Engineering Progress (Jan. 1973), vol. 69, No. 1, pp. 56-61.
Price, B.C., Zey, A. F., and Ryan, J. M. Sour Gas Processing for Gas Sales and LNG Production, Society of Petorleum Engineers 1996 International Meeting on Petroleum Engineering (Mar. 17-20, 1986), Beijing China, Paper No. SPE 14057, pp. 145-155.
Broeker, R. J. A New Process for the Transportation of Natural Gas, Proceedings of the First International Conference on LNG (1968), Chicago, Illinois, Session No. 5, Paper 30, pp. 1-11.

Affiliated with

Also associated with

Rating

Cascade refrigeration process for liquefaction of natural gas does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Cascade refrigeration process for liquefaction of natural gas, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cascade refrigeration process for liquefaction of natural gas will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2309076