Process and device for processing and preparing hydrocarbon by utilizing liquefied gas

Abstract

The invention discloses a process and a device for processing and preparing hydrocarbon by utilizing liquefied gas. The process comprises the processes of cracking reaction, absorption and stabilization, aromatization reaction, gas separation raw material gas stripping concentration and aromatic hydrocarbon purification. The device comprises a cracking reaction system, an absorption and stabilization system, an aromatization reaction system, a gas separation raw material gas stripping concentration system and an aromatic hydrocarbon purification system. The process and the device have the advantages that the energy consumption is low, and after the process is adopted, a deisobutanizer stops running, 90 kilograms of standard coals consumed by a carton-4 raw material per ton are treated, and 48.5 percent of energy is saved; gas separation raw material gas propylene is high in content and is improved from 15 percent to 50 percent in mass fraction; the requirements on equipment and heat energy are low and are easily realized; and the device is simple in process, is easy in operation and control and stable in running.

Description

technical field

[0001] The invention relates to a liquefied gas deep processing technology, in particular to a technology and a device for processing hydrocarbons by utilizing liquefied gas, and belongs to the field of processing hydrocarbons by liquefied gas. Background technique

[0002] There are many methods for the processing and separation of liquefied gas used in chemical production. At present, there is mainly one kind commonly used in the industry: first pretreatment of raw materials, the C2C3 components in the liquefied petroleum gas are extracted from the top of the depropanizer, and the mixed C4 components at the bottom of the tower enter the deisobutanizer , the isobutane is separated from the top of the deisobutanization tower, and the components with carbon four or more at the bottom of the tower enter the cracking reaction system for cracking reaction, and the obtained low-carbon hydrocarbons including propylene enter the absorption stabilization system; Abs...

Images