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A recovery method of petrochemical output gas

A petrochemical and recovery method technology, applied in the petroleum industry, chemical instruments and methods, carbon monoxide, etc., can solve the problems of low output purity, insufficient separation, high energy consumption, etc., to achieve improved purity, simple operation, and energy consumption low effect

Active Publication Date: 2020-06-05
东营亿鑫化工有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0007] Therefore, the above method has more or less disadvantages such as large investment, high energy consumption, low output purity, insufficient separation, etc.

Method used

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  • A recovery method of petrochemical output gas
  • A recovery method of petrochemical output gas

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Embodiment Construction

[0022] see figure 1 , the present invention is a kind of petrochemical output gas recovery method, concrete operation steps are as follows:

[0023] The gas produced by the petrochemical process is first pretreated to remove free water and impurities, and then the pressure is increased by the compressor 1, and then enters the cooler 2 to cool and dry, and then passes through the balance tank 3 and then flows from the bottom of the first absorption tower 4 Into the tower, the C in the gas is absorbed by the first absorbent in the first absorption tower 4 2 and heavier components to obtain a rich absorption liquid, which is discharged from the bottom of the first absorption tower 4 and enters the balance tank 3 to contact the raw gas, and the gas discharged from the top of the first absorption tower 4 enters the bottom of the second absorption tower 5 , a small amount of C in the gas is further absorbed by the second absorbent in the tower 2 , the gas discharged from the secon...

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Abstract

The invention relates to a method for recovering petrochemical engineering output gases with advantages of strong applicability, low energy consumption and high product purity. The method has excellent wide applicability, is applicable to gas by-products produced in petrochemical processing procedures such as catalytic cracking, pyrolysis, catalytic reforming, isomerization and the like, and realizes high-efficiency recovery of hydrogen, carbon monoxide, methane, ethylene, ethane and the like in chemical gases. Moreover, absorbents and refrigerants are recycled, and the economic value is high.

Description

technical field [0001] The invention relates to the field of organic chemical industry, in particular to a method for recovering gas produced in petrochemical industry. Background technique [0002] In the process of petroleum processing, due to the existence of cracking and reforming processes, a large amount of light hydrocarbon components will be by-produced, of which the dry gas yield is 3%~4%, the composition is mainly methane, and some components are rich in C 2 + Light hydrocarbons; the yield of liquefied gas is about 5%~7%, mainly C 3 、C 4 Components, and most of these by-products are part of the raw materials required in the petrochemical production process, especially methane, hydrogen, ethane, etc. are important cost components of petrochemical production. [0003] Therefore, how to separate and recover light hydrocarbons from petrochemical tail gas has great economic and social benefits. At present, the technologies for recovering light hydrocarbons mainly in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C7/00C10L1/04C01B32/40C01B21/04C01B3/56C07C9/04C07C11/04C07C9/06C07C11/06C07C9/08
CPCC01B3/56C01B21/04C01B32/40C01B2210/0025C07C7/005C10L1/04C07C9/04C07C11/04C07C9/06C07C11/06C07C9/08
Inventor 宋新军
Owner 东营亿鑫化工有限公司
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