Method for optimizing operation condition of xylene isomerization reactor

A technology for toluene isomerization and operating conditions, which is applied in the field of optimizing the operating conditions of xylene isomerization reactors, and can solve the problems that the linear regression method is difficult to solve problems completely.

Inactive Publication Date: 2004-07-07
SINOPEC YANGZI PETROCHEM +1
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Problems solved by technology

[0025] In complex nonlinear problems, the linear regression method is difficult to solve the problem perfectly

Method used

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  • Method for optimizing operation condition of xylene isomerization reactor
  • Method for optimizing operation condition of xylene isomerization reactor
  • Method for optimizing operation condition of xylene isomerization reactor

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Embodiment Construction

[0095] The xylene isomerization optimization system mainly establishes a neural network model based on the data obtained by the isomerization unit of the factory, and then, on the basis of this model, determines the optimal operating conditions for the production rate through optimization technology. The whole system can be divided into three parts: modeling, optimization and system maintenance, such as figure 1 Shown:

[0096] The overall structural workflow of the xylene isomerization optimization system, as figure 2 Shown:

[0097] Main Process Parameters Affecting Isomerization Reaction

[0098] 1 Reaction temperature

[0099] The reaction temperature is an important parameter of the isomerization reaction. The isomerization reaction is an exothermic reaction, but its thermal effect is very small, so the overall effect of temperature on the chemical equilibrium is not great. Since catalyst activity decreases as catalyst carbon deposits increase, the temperature must ...

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Abstract

A method for optimizing the operating parameters of the xylene isomerizing reactor includes such steps as combining the radial basic function RBF network of multi-variable interpolation with PLSR, inserting the default output generated by various sample data in the equation to obtain a regression model, using PLSR method to find out the regression question, choosing the ethylbenzene transform rate, isomerizing rate, C8 arylhydrocarbon output rate, etc as the dependent variables of said model, using the actual data of industrial reactor as the training samples, and performing the calculation to find out the optimal parameters.

Description

1. Technical field [0001] The invention relates to the optimization of process conditions for p-xylene isomerization reaction, in particular to a method for optimizing the operating conditions of a xylene isomerization reactor. 2. Background technology [0002] The existing xylene isomerization reactor is an imported device and process. The device uses vacuum diesel oil, heavy coked diesel oil, light coked diesel oil, straight-run naphtha, and hydrogenated gasoline as raw materials to produce p-xylene, ortho xylene and benzene. The isomerization unit is based on the raw material of C8 aromatic hydrocarbon mixture containing poor o-xylene, m-xylene and ethylbenzene, which is converted into p-xylene concentration close to the equilibrium concentration under the action of hydrogen, catalyst and certain reaction temperature and reaction pressure. The mixture of C8 aromatic hydrocarbons can improve the yield of p-xylene. The existing isomerization unit adopts the ISOMAR process...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C5/22C07C15/08
CPCG05B13/04
Inventor 陈德钊陈新华张赛军陈冲伟徐利斌李志华王净依颜学峰
Owner SINOPEC YANGZI PETROCHEM
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