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Method and device for separating gaseous hydrocarbon materials

A technology for gaseous hydrocarbons and gaseous materials, applied in separation methods, dispersed particle separation, chemical instruments and methods, etc., can solve problems such as underutilization of ethane resources, reduce equipment investment, reduce energy consumption, and reduce tower kettles The effect of temperature

Active Publication Date: 2022-05-06
CHINA PETROLEUM & CHEM CORP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In summary, the ethane resources in the dry gas of fuel-based refineries have not been fully utilized

Method used

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  • Method and device for separating gaseous hydrocarbon materials
  • Method and device for separating gaseous hydrocarbon materials
  • Method and device for separating gaseous hydrocarbon materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0043] According to a particularly preferred embodiment of the present invention, the method comprises the following steps:

[0044] (1) compressing the gaseous hydrocarbon material to increase the pressure to 3-4MPa, and then cooling to 10-20°C to obtain compressed and cooled gaseous hydrocarbon material;

[0045] (2) Liquid absorbent (such as benzene) is entered in the tower from the tower top of absorption tower, and the gaseous hydrocarbon material after the compression cooling that obtains through step (1) enters from the tower bottom of absorption tower, gaseous hydrocarbon material and benzene Contact (the theoretical plate number of the absorption tower is 15-25, the operating pressure is 2-3.5MPa, and the tower top temperature is 30-40°C), so that the components above carbon three in the gaseous hydrocarbon material are absorbed by benzene to obtain carbon-containing More than three rich solvent materials, the top of the tower is a light component containing carbon tw...

Embodiment 1

[0063] (1) The gaseous hydrocarbon material 11 is compressed in five stages by the compressor 1, so that the pressure of the gaseous hydrocarbon material 11 is increased to 3.5MPa, and then cooled to 15° C. by the cooler 2 to obtain compressed and cooled gaseous hydrocarbons materials;

[0064] (2) The theoretical plate number of absorption tower 3 is 20, operating pressure is 3.1MPa, tower top temperature 35 ℃; With benzene as liquid absorbent, liquid absorbent is entered in the tower from the tower top of absorption tower 3, through step ( 1) The obtained compressed and cooled gaseous hydrocarbon material enters from the bottom of the absorption tower 3, and the gaseous hydrocarbon material is contacted with benzene so that the components above carbon three in the gaseous hydrocarbon material are absorbed by benzene to obtain carbon three The above solvent-rich material, the tower top is the light component containing carbon two or less components and entrained with a small ...

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Abstract

The invention relates to the field of gas organic matter separation, and discloses a method and a device for separating gaseous hydrocarbon materials. The method comprises the following steps: (1) contacting a hydrocarbon material with a liquid absorbent so as to absorb components with more than 3 carbon atoms in the gaseous hydrocarbon material, so as to obtain a light component and a solvent-rich material; and (2) carrying out steam stripping on the solvent-rich material to obtain a gas-phase material and a solvent-rich liquid-phase material. The device comprises an absorption tower and a stripping tower, the absorption tower is used for contacting a hydrocarbon material with a liquid absorbent so as to absorb C3 or above components in the gaseous hydrocarbon material, and a light component and a solvent-rich material are obtained; and the stripping tower is used for stripping the solvent-rich material to obtain a gas-phase material and a solvent-rich liquid-phase material. The method and the device provided by the invention can effectively separate the components below C2 and the components above C3 in the gaseous hydrocarbon material, and are low in energy consumption, simple in process and easy to operate and control.

Description

technical field [0001] The invention relates to the field of gas organic matter separation, in particular to a method and device for separating gaseous hydrocarbon materials. Background technique [0002] A large amount of tail gas will be produced in the process of oil refining and chemical production, some of which, such as dry gas produced by catalytic cracking, thermal cracking, delayed coking, hydrocracking and other production processes, contain a lot of C2 and C3 components, and the recovery value is relatively low. High, but currently a large amount of dry gas is burned as fuel, resulting in a waste of resources. [0003] At present, there are two main ways to utilize dry gas in refineries. One is to use catalytic dry gas as raw material for ethylbenzene / styrene unit, but this method only utilizes ethylene in the dry gas, while other components such as ethane are still Burned as fuel gas. Another way to utilize dry gas is to recover the C2 and above components and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14B01D53/18
CPCB01D53/1487B01D53/1493B01D53/1425B01D53/18B01D2252/205B01D2257/7022B01D2257/7025
Inventor 张炜李东风刘智信刘罡彭晖杜周张燕孙长福秦婷婷
Owner CHINA PETROLEUM & CHEM CORP
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