Method for coupling oil refining and chemical processes

A process and chemical technology, applied in catalytic pyrolysis (CPP) to olefins and ethylene refining and separation, to achieve the effect of increasing operating flexibility, preventing overloading tower, and preventing surge shutdown

Inactive Publication Date: 2013-02-06
SHENYANG PARAFFIN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
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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

Method used

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  • Method for coupling oil refining and chemical processes

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Effect test

Embodiment 1

[0016] by figure 1 As shown, 19 in the figure is a cracked gas pipeline. The cracked gas enters the first stage suction tank 4 of the CPP cracked gas compressor through the cracked gas pipeline 19, the first stage compressor 1, the first stage condenser 5, the second stage suction tank 6, and the compressor. Second stage 2, second stage condenser 7, third stage suction tank 8, compressor third stage 3, third stage condenser 9, acid gas separation tank 10, caustic washing tower inlet condenser 11, caustic washing tower 12, caustic washing Tower outlet condenser 13, dryer feed liquid separation tank 14; between the outlet end of the three-stage suction tank 8 and the inlet of the first-stage suction tank 4, there is a pyrolysis gas return line 18 (referred to as "two-return and one"). A cracked gas return line 15 (referred to as "three-return-three") is set between the outlet of the feed separation tank 14 and the inlet of the third stage of the compressor, at the outlet end of th...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G70/04C10G11/00
Inventor 王大壮王鹤洲窦春光李惠武宋洪江巍世杰
Owner SHENYANG PARAFFIN CHEM
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