Estimation method and system for dynamics parameters of catalytic cracking reaction

Abstract

Embodiments of the invention provide an estimation method and system for dynamics parameters of a catalytic cracking reaction. The method comprises the steps of obtaining an activation energy empirical value and dynamics parameter initial values of a catalytic cracking reaction dynamics model and operation condition data of the catalytic cracking reaction; according to the activation energy empirical value, the dynamics parameter initial values and the operation condition data, obtaining simulative product distribution data of catalytic cracking by utilizing a computational fluid mechanics method; and according to the simulative product distribution data and pre-obtained actually measured product distribution data of the catalytic cracking reaction, optimizing the dynamics parameters of the catalytic cracking reaction dynamics model by utilizing a genetic algorithm, and performing estimation to obtain target dynamics parameters of the catalytic cracking reaction. The system is used for executing the method. According to the method and the system, the accuracy of estimating the dynamics parameters of the catalytic cracking reaction is improved; the tedious step of obtaining the dynamics parameters through an experiment is avoided; and the process of obtaining the dynamics parameters is simplified.

Description

technical field [0001] The embodiments of the present invention relate to the field of petrochemical technology, and in particular to a method and system for estimating kinetic parameters of catalytic cracking reactions. Background technique [0002] Catalytic cracking plays an important role in my country's oil refining industry. Its reaction process and product distribution are affected by the properties of raw materials and operating conditions. It is difficult to establish an accurate mathematical model to describe its dynamic production process. Whether an accurate mathematical model of catalytic cracking can be established is the key to accurately describe the industrial process of catalytic cracking. [0003] In the prior art, most of the mechanism-based lumped dynamics methods are used for modeling, such as three-lumped, six-lumped, and thirteen-lumped models, etc., which play a key role in the modeling process of catalytic cracking systems. The establishment of a t...

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Problems solved by technology

Therefore, the determination of the kinetic parameters in the kinetic model is a key step in the soft sensing of the catalytic cracking reaction. In the prior art, the kinetic parameters in the kinetic model are mostly obtained through a series of experiments, and the process is relatively complicated. cumbersome

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