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Title: Apparatus for the liquefaction of natural gas and methods relating to same

Abstract

An apparatus and method for producing liquefied natural gas. A liquefaction plant may be coupled to a source of unpurified natural gas, such as a natural gas pipeline at a pressure letdown station. A portion of the gas is drawn off and split into a process stream and a cooling stream. The cooling stream passes through a turbo expander creating work output. A compressor is driven by the work output and compresses the process stream. The compressed process stream is cooled, such as by the expanded cooling stream. The cooled, compressed process stream is divided into first and second portions with the first portion being expanded to liquefy the natural gas. A gas-liquid separator separates the vapor from the liquid natural gas. The second portion of the cooled, compressed process stream is also expanded and used to cool the compressed process stream. Additional features and techniques may be integrated with the liquefaction process including a water clean-up cycle and a carbon dioxide (CO.sub.2) clean-up cycle.

Inventors:
 [1];  [1];  [1];  [2];  [1];  [3];  [1];  [4]
  1. Idaho Falls, ID
  2. Ammon, ID
  3. Shelley, ID
  4. Concord, CA
Publication Date:
Research Org.:
Bechtel BWXT Idaho, LLC (Idaho Falls, ID)
Sponsoring Org.:
USDOE
OSTI Identifier:
909408
Patent Number(s):
7,219,512
Application Number:
11/124,589
Assignee:
Battelle Energy Alliance, LLC (Idaho Falls, ID) IDO
DOE Contract Number:
AC07-99ID13727; AC07-05ID14517
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
03 NATURAL GAS

Citation Formats

Wilding, Bruce M, Bingham, Dennis N, McKellar, Michael G, Turner, Terry D, Raterman, Kevin T, Palmer, Gary L, Klingler, Kerry M, and Vranicar, John J. Apparatus for the liquefaction of natural gas and methods relating to same. United States: N. p., 2007. Web.
Wilding, Bruce M, Bingham, Dennis N, McKellar, Michael G, Turner, Terry D, Raterman, Kevin T, Palmer, Gary L, Klingler, Kerry M, & Vranicar, John J. Apparatus for the liquefaction of natural gas and methods relating to same. United States.
Wilding, Bruce M, Bingham, Dennis N, McKellar, Michael G, Turner, Terry D, Raterman, Kevin T, Palmer, Gary L, Klingler, Kerry M, and Vranicar, John J. Tue . "Apparatus for the liquefaction of natural gas and methods relating to same". United States. doi:. https://www.osti.gov/servlets/purl/909408.
@article{osti_909408,
title = {Apparatus for the liquefaction of natural gas and methods relating to same},
author = {Wilding, Bruce M and Bingham, Dennis N and McKellar, Michael G and Turner, Terry D and Raterman, Kevin T and Palmer, Gary L and Klingler, Kerry M and Vranicar, John J},
abstractNote = {An apparatus and method for producing liquefied natural gas. A liquefaction plant may be coupled to a source of unpurified natural gas, such as a natural gas pipeline at a pressure letdown station. A portion of the gas is drawn off and split into a process stream and a cooling stream. The cooling stream passes through a turbo expander creating work output. A compressor is driven by the work output and compresses the process stream. The compressed process stream is cooled, such as by the expanded cooling stream. The cooled, compressed process stream is divided into first and second portions with the first portion being expanded to liquefy the natural gas. A gas-liquid separator separates the vapor from the liquid natural gas. The second portion of the cooled, compressed process stream is also expanded and used to cool the compressed process stream. Additional features and techniques may be integrated with the liquefaction process including a water clean-up cycle and a carbon dioxide (CO.sub.2) clean-up cycle.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue May 22 00:00:00 EDT 2007},
month = {Tue May 22 00:00:00 EDT 2007}
}

Patent:

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  • An apparatus and method for producing liquefied natural gas. A liquefaction plant may be coupled to a source of unpurified natural gas, such as a natural gas pipeline at a pressure letdown station. A portion of the gas is drawn off and split into a process stream and a cooling stream. The cooling stream passes through an expander creating work output. A compressor may be driven by the work output and compresses the process stream. The compressed process stream is cooled, such as by the expanded cooling stream. The cooled, compressed process stream is divided into first and second portionsmore » with the first portion being expanded to liquefy the natural gas. A gas-liquid separator separates the vapor from the liquid natural gas. The second portion of the cooled, compressed process stream is also expanded and used to cool the compressed process stream.« less
  • An apparatus and method for producing liquefied natural gas. A liquefaction plant may be coupled to a source of unpurified natural gas, such as a natural gas pipeline at a pressure letdown station. A portion of the gas is drawn off and split into a process stream and a cooling stream. The cooling stream passes through an expander creating work output. A compressor may be driven by the work output and compresses the process stream. The compressed process stream is cooled, such as by the expanded cooling stream. The cooled, compressed process stream is expanded to liquefy the natural gas.more » A gas-liquid separator separates a vapor from the liquid natural gas. A portion of the liquid gas is used for additional cooling. Gas produced within the system may be recompressed for reintroduction into a receiving line or recirculation within the system for further processing.« less
  • Apparatuses and methods are provided for producing liquefied gas, such as liquefied natural gas. In one embodiment, a liquefaction plant may be coupled to a source of unpurified natural gas, such as a natural gas pipeline at a pressure letdown station. A portion of the gas is drawn off and split into a process stream and a cooling stream. The cooling stream may be sequentially pass through a compressor and an expander. The process stream may also pass through a compressor. The compressed process stream is cooled, such as by the expanded cooling stream. The cooled, compressed process stream ismore » expanded to liquefy the natural gas. A gas-liquid separator separates the vapor from the liquid natural gas. A portion of the liquid gas may be used for additional cooling. Gas produced within the system may be recompressed for reintroduction into a receiving line.« less
  • An apparatus and method for producing liquefied natural gas. A liquefaction plant may be coupled to a source of unpurified natural gas, such as a natural gas pipeline at a pressure letdown station. A portion of the gas is drawn off and split into a process stream and a cooling stream. The cooling stream passes through a turbo expander creating work output. A compressor is driven by the work output and compresses the process stream. The compressed process stream is cooled, such as by the expanded cooling stream. The cooled, compressed process stream is divided into first and second portionsmore » with the first portion being expanded to liquefy the natural gas. A gas-liquid separator separates the vapor from the liquid natural gas. The second portion of the cooled, compressed process stream is also expanded and used to cool the compressed process stream. Additional features and techniques may be integrated with the liquefaction process including a water clean-up cycle and a carbon dioxide (CO.sub.2) clean-up cycle.« less
  • An apparatus and method for producing liquefied natural gas. A liquefaction plant may be coupled to a source of unpurified natural gas, such as a natural gas pipeline at a pressure letdown station. A portion of the gas is drawn off and split into a process stream and a cooling stream. The cooling stream passes through a turbo expander creating work output. A compressor is driven by the work output and compresses the process stream. The compressed process stream is cooled, such as by the expanded cooling stream. The cooled, compressed process stream is divided into first and second portionsmore » with the first portion being expanded to liquefy the natural gas. A gas-liquid separator separates the vapor from the liquid natural gas. The second portion of the cooled, compressed process stream is also expanded and used to cool the compressed process stream. Additional features and techniques may be integrated with the liquefaction process including a water clean-up cycle and a carbon dioxide (CO2) clean-up cycle.« less