Back to results
US 2026/0146785 A1Published application
Nitrogen Rejection Unit with Mixed Refrigerant Cooling System and Method
OwnerRavikumar Vipperla, Mathew R. Wattinventors
Life of this patent
Estimating the term…
Abstract
A system and methods for liquefying natural gas and removing nitrogen from a liquid natural gas stream. More particularly, a system and method for liquefying natural gas and removing nitrogen from a liquid natural gas stream using a mixed refrigerant refrigeration system.
Claims20
A system for liquefying a natural gas feed stream comprising:
- a liquefaction system, wherein the liquefaction system comprises
- a main heat exchanger configured to cool the natural gas feed stream in a cooling passage;
- and
- a nitrogen rejection unit in fluid communication with the cooling passage of the main heat exchanger;
- and
- a mixed refrigerant cooling system associated with the liquefaction system, wherein the mixed refrigerant cooling system is configured to cool the cooling passage of the main heat exchanger of the liquefaction system.
3 more elements
A method of liquefying a natural gas feed stream comprising the steps of:
- a. cooling the natural gas feed stream within a cooling passage of a main heat exchanger to produce a cooled natural gas fluid stream;
- b. separating the cooled natural gas fluid stream in a nitrogen rejection unit to produce a liquid natural gas product stream and a first nitrogen vapor stream;
- c. cooling a second nitrogen vapor stream from the nitrogen rejection unit in a reflux condenser to form a reflux stream;
- d. directing the reflux stream to the nitrogen rejection unit;
- e. cooling the cooling passage of the main heat exchanger with a mixed refrigerant cooling system associated with the liquefaction system.
2 more elements
Dependencies are inferred from the claim text.