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Method and apparatus for treating a hydrocarbon stream

A hydrocarbon stream, logistics technology, applied in lighting and heating equipment, cold process separation, refrigeration and liquefaction, etc., can solve the problems of unsatisfactory ethane recovery rate, complexity, high capital expenditure, etc.

Inactive Publication Date: 2012-06-13
SHELL INT RES MAATSCHAPPIJ BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The problem with the known method is that it is very complex leading to high capital expenditure (CAPEX), but at the same time it does not achieve a satisfactory recovery especially of ethane

Method used

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  • Method and apparatus for treating a hydrocarbon stream
  • Method and apparatus for treating a hydrocarbon stream

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Embodiment Construction

[0029] For the purposes of this specification, a single reference number will be assigned to a line and to the streams carried in that line. The same reference numbers refer to similar components.

[0030] The present invention seeks to provide alternative methods for processing natural gas streams.

[0031] The present invention comprises separating a partially condensed hydrocarbon feed stream into a gaseous stream and a liquid stream in a first gas / liquid separator; expanding the liquid stream and feeding it into a second gas / liquid separator; The stream is expanded and at least partially condensed, and it is fed to a second gas / liquid separator.

[0032] It has been found that using the surprisingly simple method of the present invention, CAPEX can be significantly reduced. Furthermore, also due to its simplicity, the method of the invention and the apparatus for carrying out said method have proven to be very robust when compared with known procedures.

[0033] A parti...

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Abstract

In a method of treating a hydrocarbon stream, such as a natural gas stream, a partly condensed feed stream (10) is supplied to a first gas / liquid separator (2), where it is separated into a gaseous stream (20) and a liquid stream (30). The liquid stream (30) is expanded and fed (40) into a second gas / liquid separator (3), and the gaseous stream (20) is split into at least two sub- streams (50, 70). A first sub-stream (50) of the at least two sub-streams is expanded, thereby obtaining an at least partially condensed first sub-stream (60), and subsequently fed (60) into the second gas / liquid separator (3). A second sub-stream (70) of the at least two sub-streams is cooled against a cold stream (120), thereby obtaining an at least partially condensed second sub-stream (90, 90a), which is fed(90, 90a) into the second gas / liquid separator (3) from which a gaseous stream (130) and a liquid stream (100, 100a) are removed. The at least partially condensed second sub-stream (90, 90a) may havea temperature of below -95 DEG C.

Description

technical field [0001] The present invention relates to methods of treating hydrocarbon streams, such as natural gas streams. [0002] In particular, the invention relates to the processing of natural gas streams, including the recovery of at least some ethane, propane, butane and heavier hydrocarbons such as pentane from natural gas. Recovery of hydrocarbons can be accomplished for several purposes. One purpose may be to produce a hydrocarbon stream consisting primarily of hydrocarbons heavier than methane such as natural gas liquids (NGL; usually consisting of ethane, propane and butane), liquefied petroleum gas (LPG; usually consisting of propane and butane) or condensate Oil (usually composed of butane and heavier hydrocarbon components). Another purpose may be to adjust, for example, the heating value of a hydrocarbon stream to meet desired specifications. Background technique [0003] Several methods and apparatuses are known for treating hydrocarbon streams. Examp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25J3/02
CPCF25J2205/04F25J2200/70F25J3/0238F25J2240/02F25J2290/12F25J3/0209F25J2200/02F25J2270/904F25J3/0233F25J2210/62C10L3/10
Inventor JHC·程AD·瓦尼
Owner SHELL INT RES MAATSCHAPPIJ BV