Optimizing method of reaction model for preparing ethylene molecules through naphtha high-temperature steam cracking

Abstract

The invention relates to an adjustment and parameter optimization method of a molecule reaction dynamic model (namely the Kumar molecule reaction dynamic model) for preparing ethylene molecules through naphtha high-temperature steam cracking and belongs to the field of ethylene cracking furnace process simulation and production operation optimization engineering. Reaction kinetic parameters are adjusted in a self-adaptive mode through the chaos optimization method according to characteristics and constitutions of different kinds of naphtha, furnace profile structures and operation conditions with carbon-hydrogen balance, the minimum product yield error and fine adjustment of secondary reaction kinetic parameters considered, the reaction model better adapts to different kinds of naphtha, and accuracy of process models is improved. The invention further provides a software system for achieving the method. Primary selectivity coefficients and secondary reaction kinetic parameters of the Kumar model can be automatically adjusted according to characteristics of different kinds of naphtha, the defect that an original model is poor in naphtha adaptability is overcome, and the naphtha high-temperature steam cracking process and product distribution can be accurately simulated according to different furnace profile structures and operation conditions.

Description

technical field [0001] The present invention relates to a molecular reaction dynamics model for producing ethylene by high-temperature steam cracking of naphtha - an adjustment and parameter optimization method of the Kumar molecular reaction dynamics model, which can adaptively adjust the molecular reaction kinetics model once for different naphtha characteristics The selectivity coefficient and the kinetic parameters of the secondary reaction improve the adaptability of the model to different naphtha pyrolysis and the accuracy of the cracking process model. Background technique [0002] As a basic organic chemical raw material and an active intermediary in industrial production, ethylene enjoys the honorary title of "Mother of Petrochemicals". There are many ways to produce ethylene, among which steam pyrolysis technology is the most fully developed and widely used. More than 95% of ethylene and about 60% of propylene in the world are produced in the steam cracking proces...

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Problems solved by technology

[0012] The present invention aims at effectively overcoming the shortcoming of the poor adaptability of the Kumar model to raw materials when applying the Kumar molecular reaction dynamics model to the ethylene production process of naphtha cracking in the ethylene industry, and proposes a chaotic optimization adjustment according to different naphtha characteristics Adjustment principles and solutions for the primary reaction selectivity coefficient and secondary reaction kinetic parameters of the molecular reaction dynamics model to improve the adaptability of the model to different naphtha raw materials and the accuracy of process modeling

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