Complex chemical process modeling method having astroid topologic structural film calculation

A technology of chemical process and star topology, applied in computing models, calculations, biological models, etc., can solve problems such as poor local search ability, low search efficiency, and easy prematurity

Inactive Publication Date: 2009-11-25
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the conventional genetic algorithm (SGA), as a random search method with wide adaptability and strong robustness, has strong global search ability and is suitable for solving such problems. However, this method has low search efficiency and poor local search ability. and precocious

Method used

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  • Complex chemical process modeling method having astroid topologic structural film calculation
  • Complex chemical process modeling method having astroid topologic structural film calculation
  • Complex chemical process modeling method having astroid topologic structural film calculation

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Embodiment

[0087] In the following, the method of the present invention is used in the determination of the three lumped models of heavy oil cracking, and is further described in detail:

[0088] The cracking of heavy oil adopts the lumped reaction model, which can simplify the reaction system with many components, that is, many single compounds in the reaction system are combined into several virtual components according to the principle of similar kinetic properties, so as to establish a simplified lumped reaction system. Kinetic model of the reaction. (See figure 2 )

[0089] Let x be the sum of the yields of the fractions, pyrolysis gas and toluene-insoluble matter produced at temperatures below 510°C from heavy oil H as a raw material; x w is the heavy middle distillate yield at 390°C-510°C; x L It is the sum of pyrolysis, 210-390°C light fraction and condensation product yields. assumed:

[0090] (1) The raw material H for the pyrolysis reaction is toluene soluble matter grea...

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Abstract

The invention discloses a complex chemical process modeling method having astroid topologic structural film calculation, comprising steps of: 1) acquiring input and output sampling data of chemical process via on-site operation or experiment; for input sampling data of same group of chemical process, using error absolute value sum of estimated output chemical process mould and actual sampling output of chemical process as a target function; 2) setting control parameters having astroid topologic structural film calculation; 3) operating the astroid topologic structural film calculation to estimate unknown parameters in the chemical process mould to acquire estimation value of unknown parameters in the chemical process mould via minimal target function; introducing the estimation value of unknown parameters to the chemical process mould to form a mathematic mould of chemical process. The invention uses astroid topologic structure, which protects object with smaller function value in optimizing process having high precision and rapid speed of optimization. Diversity of group is added due to rule of conversion.

Description

technical field [0001] The invention relates to a modeling method, in particular to a complex chemical process modeling method with star topological structure membrane calculation. Background technique [0002] Due to the increasing complexity of chemical process systems and the serious nonlinear characteristics of many chemical objects, chemical process modeling has always been a difficult and hot research point in the field of chemical engineering, and is an indispensable part of modern chemical industry production. Modern chemical process control is based on its corresponding mathematical modeling, that is to say, the mathematical model of chemical process is the core of control. Establishing an accurate mathematical model is of great significance to the theoretical research and practical application of chemical process. [0003] Traditionally, there are two main types of methods for establishing mathematical models of chemical plants, one is the mechanism model method, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06N3/00
Inventor 付杰王宁
Owner ZHEJIANG UNIV
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