Process flow for raw material pretreatment portion of catalytic dry gas produced phenylethane

Abstract

The invention discloses a predisposing technological flow path of ethylbenzene through catalyzing dried gas, which comprises the following steps: adsorbing propylene; desorbing ethylene; desorbing propylene; adding raw material to strip propylene; washing most of MEDA; entering standard dried gas in the delivery tank; entering into propylene adsorbing tower; draining purified dried gas from top of propylene adsorbing tower; making one path as cool material in the ethylene stripping tower and one path to exchange heat with base material of propylene stripping tower under 10-300 deg.c in the ethylene stripping tower; desorbing ethylene component; draining ethylene gas; returning in the dried gas delivery tank; circulating between ethylene stripping tower and propylene stripping tower; desorbing propylene component from adsorbant with 150ppm-0.7% dried propylene in the stripped propylene.

Description

Technical field:

[0001] The invention relates to the technical field of refinery gas recovery in petrochemical industry, specifically, it is an absorption and desorption process flow---a process flow of the raw material pretreatment part of catalytic dry gas production of ethylbenzene. Background technique:

[0002] Refinery gas is the gas produced by various process units in the petroleum processing process (including hydrogen and C 1 to C 4 Alkanes, alkenes and a small amount of C 5 ) collectively. The equipment for generating refinery gas mainly includes thermal processing processes such as initial distillation of crude oil, catalytic cracking, hydrocracking, coking, and visbreaking. In the industry, absorption and desorption methods are generally used to remove more than C in the gas 3 and less than C 2 The components are separated and recovered, which is the absorption and desorption process used in general refineries.

[0003] There are currently two types of abs...

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