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Method for the production of liquefied natural gas and nitrogen

a technology of liquefied natural gas and nitrogen, which is applied in the direction of liquefaction, solidification, cold treatment separation, etc., can solve the problems of uneconomical options and high product cost, and achieve the effect of less cost, more efficient and flexible methods of producing lng

Inactive Publication Date: 2017-02-09
LAIR LIQUIDE SA POUR LETUDE & LEXPLOITATION DES PROCEDES GEORGES CLAUDE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is a way to make LNG that is cheaper, more efficient, and flexible. It can involve combining a nitrogen production facility with an LNG production facility. This may help to lower costs and make the process more streamlined.

Problems solved by technology

Alternatively, small scale LNG plants could be installed but also result in a high cost of product, thereby making these options uneconomical.

Method used

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  • Method for the production of liquefied natural gas and nitrogen
  • Method for the production of liquefied natural gas and nitrogen
  • Method for the production of liquefied natural gas and nitrogen

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Embodiment Construction

[0031]While the invention will be described in connection with several embodiments, it will be understood that it is not intended to limit the invention to those embodiments. On the contrary, it is intended to cover all the alternatives, modifications and equivalence as may be included within the spirit and scope of the invention defined by the appended claims.

[0032]In one embodiment, the apparatus can include a Main Air Compressor (MAC), an air purification system, heat exchange means, a distillation column, and a nitrogen refrigeration cycle having a nitrogen recycle compressor and warm and cold turbine boosters. In one embodiment, the nitrogen refrigeration cycle provides compression energy for pressurized gaseous nitrogen product as well as refrigeration for both cooling down the incoming air and liquefy nitrogen, as well as providing refrigeration to liquefy the natural gas to LNG. In one embodiment, the warm turbine booster flow can be split to provide refrigeration to both th...

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Abstract

A method for the production of liquefied natural gas (“LNG”) and nitrogen is provided. The method may include the steps of: a) providing a nitrogen production facility, wherein nitrogen production facility comprises: a main heat exchanger, an air separation unit, a nitrogen recycle compressor, a first nitrogen refrigeration supply configured to provide refrigeration to the main heat exchanger for cooling a main air feed, b) providing a secondary refrigeration supply; c) liquefying a natural gas stream using refrigeration from the secondary refrigeration supply to form an LNG product stream; wherein the secondary refrigeration supply is configured to compress and expand a refrigerant to produce refrigeration, wherein the refrigerant of the secondary refrigeration supply is shared with refrigerant of the first nitrogen refrigeration supply

Description

RELATED APPLICATIONS[0001]This application claims priority to U.S. Provisional Application Ser. No. 62 / 201,947 filed on Aug. 6, 2015, U.S. Provisional Application Ser. No. 62 / 305,381 filed on Mar. 8, 2016, and U.S. Provisional Application Ser. No. 62 / 370,953 filed on Aug. 4, 2016, all of which are hereby incorporated by reference in their entireties.TECHNICAL FIELD OF THE INVENTION[0002]The present invention generally relates to a method and apparatus for efficiently producing liquefied natural gas (“LNG”).BACKGROUND OF THE INVENTION[0003]Small scale nitrogen generators (e.g., typically 100 mtd to 400 mtd) are commonly needed at remote locations where the cost of an air separation unit producing O2 and N2 is not required or justified. The nitrogen can be (1) low purity gaseous for utility purposes (e.g., ethane cracker), (2) liquid form for fracking purposes, or (3) higher purity merchant product, particularly in locations such as North Dakota or Alberta. These sites can also have a...

Claims

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Application Information

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IPC IPC(8): F25J1/02F25J3/02F25J3/04F25J1/00
CPCF25J1/0238F25J2240/12F25J1/0015F25J3/0257F25J3/04412F25J2210/40F25J2210/60F25J2220/44F25J2290/12F25J2230/42F25J2205/02F25J2240/44F25J2270/42F25J2245/42F25J1/0022F25J1/0037F25J1/004F25J1/0045F25J1/005F25J1/0072F25J1/0204F25J1/0264F25J1/0271F25J1/0274F25J1/0288F25J2210/06F25J2220/64F25J2230/60F25J2270/16F25J1/0236F25J2270/06F25J3/04357F25J2200/50F25J1/0234F25J2200/40F25J3/04224F25J3/044F25J1/0035F25J2200/72F25J2200/76F25J1/0202F25J2215/64F25J1/0007F25J1/001F25J2215/62F25J1/0281F25J1/0232F25J2230/20F25J2270/14F25J2210/02F25J2230/30F25J1/0224F25J1/0052F25J1/0092F25J1/0208F25J1/0275F25J1/0292F25J2205/04F25J2215/42F25J2220/02F25J2220/60F25J2220/66F25J2220/68F25J2230/22F25J2240/02F25J2240/40F25J2245/02F25J2270/08F25J2270/88F25J2290/34F25J2290/70
Inventor TURNEY, MICHAEL A.
Owner LAIR LIQUIDE SA POUR LETUDE & LEXPLOITATION DES PROCEDES GEORGES CLAUDE
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