Method for liquefaction of gas
US8806891B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 1, 2007 |
| Grant date | Aug 19, 2014 |
| Priority date | — |
| Expiry date | Oct 10, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25J2290/32
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention relates to a process plant and method for cooling and optionally liquefaction of a product gas, particularly for liquefaction of natural gas, based on a closed loop of multi-component refrigerant in heat exchange with the gas to be cooled and optionally condensed. The process plant is comprises at least one primary heat exchanger (20) arranged to cool the product gas directed to the heat exchanger (10), at least one compressor (46) arranged to compress the low level refrigerant directed from the first of the at least two secondary heat exchangers (64), at least one pre-cooling heat exchanger (54) to sub-cool and partly liquefy the compressed refrigerant, at least one phase-separator (60) arranged to separate the partly liquefied multi-component refrigerant into a more volatile fraction and a less volatile fraction, at least two secondary heat exchangers (64, 114), the first of the at least two secondary heat exchangers (64) arranged to cool the more volatile fraction from the phase-separator (62), and the second of the at least two secondary heat exchangers (114) arranged to cool further the more volatile fraction, a throttling device (118) arranged to reduce …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.