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Process for liquefying a hydrocarbon-rich stream

A post-liquefaction, hydrocarbon-enriched fraction technology, applied in liquefaction, refrigeration and liquefaction, irreversible cycle compressors, etc., can solve the limitation of intervention possibilities or the number of degrees of freedom, and the difficulty of targeted adjustment and adjustment of temperature curves, etc. question

Active Publication Date: 2015-10-07
LINDE AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the liquid phase of the cooling medium can only evaporate at one pressure level
Targeted regulation and adjustment of the desired temperature profile is therefore difficult, since the intervention possibilities or the number of degrees of freedom are limited in such processes

Method used

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  • Process for liquefying a hydrocarbon-rich stream
  • Process for liquefying a hydrocarbon-rich stream

Examples

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Embodiment Construction

[0013] Explained below figure 2 The embodiment shown in only describes and figure 1 The difference between the methods shown in.

[0014] The method for liquefying hydrocarbon-rich fractions of the present invention figure 1 with 2 The embodiment shown in has a separation tower T, which is used to remove C 2+ The fraction is separated from the hydrocarbon-rich fraction to be liquefied. The fraction to be liquefied is referred to as a natural gas stream in the following and is supplied to the multi-stream heat exchanger E3 via the line 1.

[0015] The multi-stream heat exchanger is preferably configured as a welded aluminum plate heat exchanger. According to the size of the equipment, 1 to 6 heat exchanger units connected in parallel are preferably arranged. Alternatively, the multi-stream heat exchanger E3 may also be configured as a wound heat exchanger. Here, the aluminum plate heat exchanger is preferably used for the liquefaction capacity with an annual output of 30,000 to ...

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Abstract

A method for liquefying a hydrocarbon-rich fraction and simultaneously separating a C2+-rich fraction is described. In said method, the hydrocarbon-rich fraction is cooled and liquefied by indirectly exchanging heat with the coolant mixture of a coolant mixture cycle in which the coolant mixture is condensed in at least two stages, and the C2+-rich fraction is separated at an adjustable temperature level, wherein the coolant mixture is separated into a gaseous and a liquid fraction, and both fractions are supercooled, are expanded essentially to the initial pressure of the first condenser stage, and are at least partially evaporated. According to the invention, at least a partial stream (19, 24) of the liquefied, previously gaseous fraction of the coolant mixture (15) is at least temporarily expanded (j, h) and admixed to the expanded liquid fraction of the coolant mixture (21).

Description

Technical field [0001] The present invention relates to a method for separating C-rich 2+ A method for simultaneously liquefying hydrocarbon-rich fractions, wherein the cooling and liquefaction of the hydrocarbon-rich fractions are carried out under the condition of indirect heat exchange with the cooling medium mixture of the cooling medium mixture circulation loop and enriched in C 2+ The separation of the fractions is carried out at an adjustable temperature level. In the cooling medium mixture circulation loop, the cooling medium mixture is compressed in at least two stages, wherein the cooling medium mixture is divided into gaseous and liquid fractions. Both fractions are cooled, expanded substantially to the suction pressure of the first compressor stage, and at least partially evaporated. Background technique [0002] For example, DE-A 197 22 490 discloses a method for liquefying hydrocarbon-rich fractions of the type described. This liquefaction method is used, for exampl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25J1/02
CPCF25B9/006F25B1/10F25J1/0022F25J1/0055F25J1/0212F25J1/0244F25J1/0291F25J3/0209F25J3/0233F25J3/0238F25J2200/02F25J2200/70F25J2210/06F25J2215/04F25J2245/02F25J2270/18F25J2270/66F25J2270/902F25J2280/02
Inventor H·鲍尔R·扎佩尔D·加尔特
Owner LINDE AG
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