Partial energy coupled separation system of carbon 3, carbon 4 and carbon 5 used in predepropanization technological process and operation method

A technology for depropane ethylene and separation systems, which is applied in fractionation, gas mixture processing, petroleum industry and other directions to achieve the effect of reducing quantity, equipment investment and energy consumption
CN101798528AInactive Publication Date: 2010-08-11TIANJIN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TIANJIN UNIV
Publication Date
2010-08-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a partial energy coupling separation system of carbon 3, carbon 4 and carbon 5 used in a predepropanization technological process and an operation method. Aiming at the situation that the content of C3 component is higher in raw materials, i.e., the content of the C3 component is respectively higher than that of C4 component and C5+ component, partial energy is integratedin a low pressure depropanizer and a debutanizer in the predepropanization technological process, and the partial energy coupled distillation column separation of a direct sequence structure can be completed in a diving wall column, or the separation is completed through the thermodynamically equivalent partial energy coupled direct distillation column sequence, thereby reducing the number of heat exchangers in the technological process, and obviously reducing the equipment investment and energy consumption in the separation process of a mixture.
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Description

technical field

[0001] The invention relates to the technical field of rectification, in particular to an energy coupling separation device and separation method for carbon three, carbon four and carbon five in the pre-depropane ethylene process, which can realize carbon three, carbon four and carbon five components Completing the separation in a rectification column or sequence of rectification columns with partial energy coupling can significantly reduce the equipment investment and energy consumption of the mixture separation process. Background technique

[0002] In the production process of the former depropanization ethylene process (G.M.Clancy and R.W.Townsend, Ethylene Plant Fractionation, Chemical Engineering Progress, 1971, 67 (2): 41-44), the cracked gas is quenched, compressed, alkaline washed, dried, and then After cryogenically entering the high-pressure depropanizer, ethane and lighter components are separated from other heavy components in the stripping secti...

Claims

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