Combined technology of catalytic cracking absorbing stabilizing system and C3 intercooling oil absorption

Abstract

The invention discloses a combined technology of a catalytic cracking absorbing stabilizing system and C3 intercooling oil absorption, belonging to the technical field of integration of oil refining and ethylene, and providing a method for recovering dry gas by the combination of the absorbing stabilizing system and the C3 intercooling oil absorption. The method eliminates a desorption column of the absorbing stabilizing system, and avoids the constant circulation of a great amount of ethylene, ethane and liquefied gas in desorption gas between absorption and desorption, thus reducing the load of an absorption column and saving the energy consumption of the desorption column; as coarse C3 in a dethanizing column kettle of an ethylene unit is used as an absorbent, raw material is easy to obtain, and the cost is low; the desorption column of an original C3 oil absorption column for absorbing intercooling oil is eliminated, the constant circulation of a great amount of C2 and C3 in the desorption gas between absorption and desorption is avoided, and an expansion engine and an ice chest are adopted for recovering refrigeration capacity, thus saving consumption of the refrigeration capacity and heat capacity; and the regeneration of a C3 absorbing agent, the demethanation and the separation of the ethylene are all conducted in the ethylene unit, thus fully showing the reciprocity of the oil refining and ethylene, and being reasonable in flow.

Description

technical field [0001] The invention relates to a combination process of a catalytic cracking absorption stabilization system and C3 intercooler oil absorption, and furthermore, relates to a combination process technology of an absorption stabilization system and C3 intercooler oil absorption refining ethylene. Background technique [0002] The combination of refining process and ethylene process is an important measure to achieve the maximum output of transportation fuel and ethylene raw material with the minimum input of crude oil, so as to save resources and improve economic benefits. The integration of refinery process and ethylene process design is an inevitable choice. [0003] The mutual supply and reciprocity of the by-products of the refining process and the ethylene process is very strong. Ethylene raw materials include straight-run naphtha and reformed top oil from refineries, hydrocracked light naphtha and tail oil, hydrocokered gasoline, reformed raffinate and ...

AI Technical Summary

Problems solved by technology

A typical pressure swing adsorption device requires 10-16 adsorption towers, and each adsorption tower is repeatedly operated through the steps of adsorption, replacement, reverse discharge, evacuation, and pressure boost. This method has problems such as high equipment investment and large floor space.

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