초록 ▼

A process for using the cold of pressurized liquefied natural gas (PLNG) to compress boil-off vapors produced by handling of liquefied natural gas to produce a higher pressure gas product and at the same time produce power that preferably provides at least part of the power for the process. The PLNG

A process for using the cold of pressurized liquefied natural gas (PLNG) to compress boil-off vapors produced by handling of liquefied natural gas to produce a higher pressure gas product and at the same time produce power that preferably provides at least part of the power for the process. The PLNG is pressurized, passed to a first heat exchanger for vaporization, and the vaporous material is passed to a second heat exchanger for further heating to produce a first gas product. A refrigerant is circulated in a closed cycle through the first heat exchanger to heat the PLNG, through a pump to pressurize the refrigerant, through a second heat exchanger to vaporize the refrigerant, and through a work-producing device to generate energy. Boil-off gas is compressed and passed through the first heat exchanger, further compressed, and then passed through the second heat exchanger to produce a second gas product.

대표청구항 ▼

[ What is claimed is:] [1.] A process for recovering power in which liquefied natural gas is gasified and the cold potential thereof is utilized, comprising the steps of:(a) pressurizing the liquefied natural gas to a predetermined pressure;(b) passing the pressurized liquefied natural gas through a

[ What is claimed is:] [1.] A process for recovering power in which liquefied natural gas is gasified and the cold potential thereof is utilized, comprising the steps of:(a) pressurizing the liquefied natural gas to a predetermined pressure;(b) passing the pressurized liquefied natural gas through a first heat exchanger whereby the liquefied natural gas is vaporized;(c) passing the vaporized natural gas through a second heat exchanger whereby the vaporized natural gas is heated to produce a first vaporous product;(d) circulating a refrigerant as a working fluid in a closed circuit through the first heat exchanger to condense the refrigerant and to heat the liquefied gas, through a pump to pressurize the condensed refrigerant, through a second heat exchanger in which heat is absorbed from a heat source to vaporize the pressurized refrigerant, and through a work-producing device to generate energy;(e) compressing boil-off vapor by a first compression means;(f) passing the compressed boil-off vapor through the first heat exchanger to cool the boil-off vapor and to heat the liquefied gas; and(g) further compressing the boil-off vapor by a second compression means and passing the compressed vapor from the second compression means through the second heat exchanger to heat the boil-off vapor to produce a second vaporous product.