Method and equipment for separating gas mixture containing methane by distillation and gas obtained by separation

A technology of mixtures and fractions, applied in lighting and heating equipment, cold treatment separation, refrigeration and liquefaction, etc., can solve the problems of multi-energy and consumption, and achieve the effect of reducing compression costs

Inactive Publication Date: 2008-05-21
TECH FRANCE SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although these emerging methods can produce ethane and other hydrocarbons in very satisfactory quantities, they are relatively energy-intensive to obtain methane- or C-rich 2 and fractions of higher hydrocarbons

Method used

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  • Method and equipment for separating gas mixture containing methane by distillation and gas obtained by separation
  • Method and equipment for separating gas mixture containing methane by distillation and gas obtained by separation
  • Method and equipment for separating gas mixture containing methane by distillation and gas obtained by separation

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Embodiment Construction

[0028] The following symbols appear specifically in both figures: FC - for flow controller; GT - for gas turbine; LC - for liquid level controller; PC - for pressure controller; SC - for speed controller; and TC - refers to temperature controller.

[0029] In order to make the drawings clear and concise, the pipelines used in the equipment in Figures 1 and 2 will be marked with the same numerals as the gaseous fractions flowing therein.

[0030] Referring to Figure 1, the apparatus shown is used to process dry natural gas for the specific purpose of, in one aspect, separating from the natural gas a fraction consisting essentially of methane that is substantially free of any C 2 and higher hydrocarbons; on the other hand, a predominantly C-containing 2 and fractions of higher hydrocarbons that are substantially free of any methane.

[0031] The dry natural gas 14 is first divided into a fraction 15 and another fraction 16, the fraction 15 being sent to a heat exchanger E1 for ...

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Abstract

The invention concerns a method and an installation for separating a gas mixture and gases obtained by said installation. The invention concerns a method and an installation for cryogenic separation of constituents of a natural gas under pressure (14) with a first phase separator (B1) whereof the constituents of each of the phases are separated in a distillation column (C1). Part of the gas fraction (5) derived from the head of the column (C1) is recycled at the last stage thereof. The method further comprises diverting (9) part of a first head fraction (3) derived from the first phase separator. Additionally, the method comprises separating a first base fraction (4) derived from the first separator, in a second separator (B2). The invention also relates to other embodiments.

Description

technical field [0001] The present invention, according to its primary design concept, generally relates to a separation process for separating various components of natural gas into a first gaseous fraction and a second gaseous fraction, wherein the first gaseous fraction is rich in methane , but essentially free of C 2 and higher hydrocarbons, while the second gaseous fraction is rich in C 2 and higher hydrocarbons, but essentially free of methane. [0002] More specifically, according to its first aspect, the present invention relates to a process for 2 and the pressure cooled mixture of higher hydrocarbons is separated into a light end fraction rich in methane and a heavy end fraction rich in C 2 and higher hydrocarbons, the method comprising: a first step (I) in which (Ia) the cooled pressurized mixture is separated into a relatively volatile first top in a first tank Fraction, and a relatively less volatile first bottoms fraction, (Ib) the first bottoms fraction is d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25J3/02
CPCF25J2205/04F25J3/0209F25J2200/76F25J2240/02F25J2200/02F25J2280/02F25J3/0233F25J3/0238
Inventor 亨利·帕拉多斯基
Owner TECH FRANCE SA
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