Method for coupling oil refining and chemical processes

Abstract

A method for coupling oil refining and chemical processes is implemented by a first compressor section, a second compressor section, a third compressor section, a first-section suction tank, a second-section suction tank, a third-section suction tank, a first-section condenser, a second-section condenser, a third-section condenser, an acidic gas dispensing tank, an inlet condenser of an alkaline washing tower, the alkaline washing tower, an outlet condenser of the alkaline washing tower and a feeding dispensing tank of a dryer. A pyrolysis gas return pipeline is arranged between an outlet end of the third-section suction tank and an inlet of the first-section suction tank, and a pyrolysis gas return pipeline is arranged between an outlet of the feeding dispensing tank of the dryer and an inlet of the third compressor section. The technical scheme includes that a pyrolysis gas return pipeline is arranged between an outlet end of the acidic gas dispensing tank and an inlet end of the third-section suction tank, and a pyrolysis gas return pipeline is arranged between an outlet end of the second-section condenser and an outlet of the second-section suction tank. The method has the advantages that the sectional flux can be within a designed load range assuredly, normal and stable running of a CPP (catalytic pyrolysis process) pyrolysis gas compressor is guaranteed, a CPP reaction and regeneration system and a pyrolysis gas refining and separating system are directly coupled, and oil refining and chemical engineering are integrated.

Description

technical field [0001] The invention relates to the technical field of catalytic pyrolysis (CPP) production of olefins and ethylene refining and separation, in particular to a method for coupling the refining and chemical processes of a CPP refining system and a cracking gas refining and separation system through a cracking gas compressor. Background technique [0002] The so-called "CPP technology" is a technology for producing basic organic chemical raw materials mainly ethylene from heavy oil. The original design of the pyrolysis gas compressor uses the inlet of the dryer to return the pyrolysis gas from the outlet of the liquid separation tank to the third-stage inlet of the compressor ("three returns to three"), and the pyrolysis gas from the outlet of the third-stage suction tank of the pyrolysis gas compressor returns to the first-stage inlet of the compressor (" Two to one") design, this design can prevent the compressor from shutting down due to shock, but it is eas...

AI Technical Summary

Problems solved by technology

In order to solve the problem of not only preventing the cracking gas compressor from shutting down due to shock, but also preventing the gas flow of the alkali washing tower from overloading the tower, so as to solve the problem of direct coupling between the CPP refining system and the refining and separation system, and realize the integration of refining and chemical industry

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