Methods and configurations for LNG liquefaction
US12181214B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 26, 2021 |
| Grant date | Dec 31, 2024 |
| Priority date | — |
| Expiry date | Dec 23, 2041 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25J2270/16
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Systems and methods for pre-cooling a natural gas stream to a liquefaction plant. A system may include a compressor configured to receive a first natural gas stream at a first pressure and produce a second natural gas stream at a second pressure; an exchanger to cool the second natural gas stream; and an expander to receive the cooled natural gas stream and expand the cooled natural gas stream to produce a chilled natural gas stream.The refrigeration content of the refrigerant is used to liquefy and sub-cool the natural gas stream to produce liquefied natural gas in a cold box or cryogenic exchanger. The refrigerant may be an external gas or an internal refrigerant working fluid expanded and compressed in a twin compander arrangement and compressed by a refrigerant compressor, or an external single mixed refrigerant working fluid compressed by a refrigerant compressor and expanded thru a JT valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.