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A visbreaking heat residence time estimation method and reaction device

A visbreaking and residence time technology, which is applied in measuring devices, cracking, non-catalytic thermal cracking, etc., can solve the problems of inestimable thermal residence time, meet the needs of scientific research and production, optimize and improve equipment, and reduce costs Effect

Active Publication Date: 2016-11-23
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the problem that the existing technology cannot estimate the thermal residence time of the raw material oil in the reaction tower during the visbreaking process at the reaction temperature, the present invention provides a method for estimating the thermal residence time of visbreaking and a reaction device

Method used

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  • A visbreaking heat residence time estimation method and reaction device
  • A visbreaking heat residence time estimation method and reaction device

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Effect test

Embodiment 1

[0029] Such as figure 1 As shown, the embodiment of the present invention provides a method for estimating the thermal residence time of visbreaking, and the estimating method includes:

[0030] Step 1: adding feedstock oil into the visbreaking reactor, the feedstock oil is the same as the feedstock oil used in industrial visbreaking reactions;

[0031] Step 2: Heat the vis-reducing reactor to 350°C at a rate of 1-5°C per minute through the heating furnace, because when the reaction temperature is not higher than 350°C, the raw material oil will not undergo fission reaction, and then continue to reduce the viscosity. Heat the visbreaking reactor so that the temperature of the visbreaking reactor rises rapidly to the inlet temperature of the industrial visbreaking reaction tower within 1 to 3 minutes, and record the initial time when the visbreaking reaction starts. At the same time, the visbreaking reactor The reaction pressure in the tank is controlled at 0-0.2MPa, light gas...

Embodiment 2

[0036] Such as figure 2 As shown, the embodiment of the present invention provides a visbreaking reaction device, which includes: a visbreaking reactor 1, a heating furnace 2, a condenser 3, a receiver 4 and a pressure controller 5. The viscous reactor 1 is arranged above the heating furnace 2, and the heating furnace 2 is used to heat the visbreaking reactor 1, the visbreaking reactor 1, the condenser 3 and the receiver 4 are connected internally, and the pressure controller 5 is arranged above the receiver 4 When working, the light gas oil in the visbreaking reactor 1 enters the receiver 4 through the condenser 3, and the noncondensable gas in the receiver 4 is discharged through the pressure controller 5.

[0037] Further, the visbreaking also includes a pressure supplement port 6 , and the pressure supplement port 6 is arranged on the upper part of the visbreaking reactor 1 .

[0038] Further, the visbreaking device also includes a light gas oil outlet 7, and the light g...

Embodiment 3

[0041] Such as figure 1 As shown, the embodiment of the present invention provides a method for estimating the thermal residence time of visbreaking, and the estimating method includes:

[0042] A tower-type visbreaking unit in a refining and chemical company, the inlet temperature of the reaction tower is 370°C, the outlet temperature is 360°C, the pressure is 0.7MPa, the mass ratio of water injection to raw oil is 0.7:100, the cold retention of raw oil in the reaction tower The time is 90 minutes, the properties of the raw material oil are shown in Table 1, and the kinematic viscosity of the raw material oil at 100°C is 781.4mm 2 / s, the kinematic viscosity at 100°C of the normal pressure industrial visbroken residue oil above 350°C produced after the real boiling point cutting of the industrial visbreaking oil is 600.5mm 2 / s.

[0043] Add the same raw material oil used in the above reaction into the reactor, control the reaction pressure in the reactor to 0MPa, turn on t...

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Abstract

The present invention discloses a visbreaking thermal residence time estimation method and a reaction apparatus, and belongs to the field of petrochemical industry. The method comprises: adding raw material oil to a viscosity reducing reactor; heating the viscosity reducing reactor so as to make the raw material oil be subjected to visbreaking, wherein the reaction temperature and the industrial visbreaking temperature are the same; collecting light gas oil; after completing the reaction, mixing the viscosity reducing oil in the viscosity reducing reactor and the light gas oil to obtain the viscosity reducing generating oil; and carrying out true boiling point cutting on the viscosity reducing generating oil and industrial viscosity reducing oil, and comparing the kinematic viscosities of the two viscosity reducing residue oils at the same temperature, wherein the reaction time is the thermal residence time of the industrial visbreaking when the relative difference of the kinematic viscosities is within the predetermined value range. The reaction apparatus comprises the viscosity reducing reactor, a heating furnace, a condenser, a receiver and a pressure controller. According to the present invention, with the visbreaking thermal residence time estimation and the laboratory visbreaking optimization results, the basis is provided for the optimization and the improvement on the industrial tower type visbreaking apparatus process conditions and the industrial apparatus, and the science research and production requirements are met.

Description

technical field [0001] The invention relates to the technical field of petrochemical industry, in particular to a visbreaking thermal residence time estimation method and a reaction device. Background technique [0002] In the field of petrochemical industry, for some heavy and high-viscosity feedstock oils—residual oil or crude oil, most of them need to undergo visbreaking reaction, the purpose of which is to convert heavy and high-viscosity feedstock oil into lower viscosity through shallow thermal cracking reaction and lower pour point oils to meet or approach fuel oil specifications. Visbreaking is a shallow thermal cracking process of feedstock oil. The process of industrial visbreaking reaction includes: first, the feedstock oil is heated to a high temperature through a heating furnace, which is the inlet temperature of the reaction tower; Under appropriate temperature and pressure conditions, mild thermal cracking is carried out; then, quenching oil is injected into ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G9/14G01N11/00
Inventor 刘海澄李天书孙丽汪太龙张戬吴冰田欢梁士军张华孙德胜陈元望
Owner PETROCHINA CO LTD
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