SYSTEM AND METHOD FOR THE PRODUCTION OF LIQUEFIED NATURAL GAS

摘要

A system and method for producing liquefied natural gas are provided. The method may include compressing a process stream containing natural gas in a compression assembly to produce a compressed process stream. The method may also include removing non-hydrocarbons from the compressed process stream in a separator, and cooling the compressed process stream with a cooling assembly to thereby produce a cooled, compressed process stream containing natural gas in a supercritical state. The method may further include expanding a first portion and a second portion of the natural gas from the cooled, compressed process stream in a first expansion element and a second expansion element to generate a first refrigeration stream and a second refrigeration stream, respectively. The method may further include cooling the natural gas in the cooled, compressed process stream to a supercritical state with the first and second refrigeration streams to thereby produce the liquefied natural gas.

主权项

1. A method for producing liquefied natural gas, comprising:
compressing a process stream containing natural gas from a natural gas source in a compression assembly fluidly coupled with the natural gas source to produce a compressed process stream; removing one or more non-hydrocarbons from the compressed process stream in a separator fluidly coupled with the compression assembly; cooling the compressed process stream with a cooling assembly fluidly coupled with the compression assembly, thereby producing a cooled, compressed process stream containing the natural gas in a supercritical state; expanding a first portion of the natural gas in the cooled, compressed process stream in a first expansion element to generate a first refrigeration stream; expanding a second portion of the natural gas in the cooled, compressed process stream in a second expansion element to generate a second refrigeration stream; and cooling at least a portion of the natural gas in the cooled, compressed process stream to a subcritical state with the first refrigeration stream and the second refrigeration stream, thereby producing the liquefied natural gas.