Propylene polymerization quality on-line measurement system

Abstract

The invention relates to a propylene polymerization quality on-line measurement system, which comprises a chaos reconstruction module for reconstructing operation parameters of a propylene polymerization process according to chaos characteristics to obtain input variables; a Gabor wavelet analysis module, used for analyzing the wavelet characteristics of the input variable by taking the frequency as the reference, reconstructing the variable through a Gabor kernel function, representing the local texture information of the input variable in each scale and each direction under different frequencies, and obtaining an input characteristic signal; and an extreme random tree measurement model module, used for converting the input characteristic signal and outputting a soft measurement value of the corresponding polypropylene product on the basis of a polypropylene product sample set and priori knowledge. The system overcomes the defects that a traditional chemical instrument lags in measurement time and is low in measurement precision, online maintenance of the system can be achieved, the measurement accuracy is improved by combining the chaos characteristic of the aggregation process, and the measurement system is high in robustness, high in confidence level and high in reliability.

Description

technical field [0001] The present invention relates to the field of polymerization process measuring instrument, machine learning field, intelligent optimization field and model maintenance field, in particular to an online measurement system for propylene polymerization quality with chaotic group intelligent optimization. Background technique [0002] Polypropylene is a thermoplastic resin produced by propylene polymerization. The most important downstream product of propylene, 50% of the world's propylene and 65% of my country's propylene are used to make polypropylene. It is one of the five general-purpose plastics. are closely related to daily life. Polypropylene is the fastest growing general-purpose thermoplastic resin in the world, second only to polyethylene and polyvinyl chloride in total. In order to make my country's polypropylene products have market competitiveness, develop impact copolymer products, random copolymer products, BOPP and CPP film materials, fiber...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings of the current existing propylene polymerization production process, which are not high in measurement accuracy and easily affected by human factors, the purpose of the present invention is to provide a measurement system that realizes online maintenance of the system and improves measurement accuracy in combination with the chaotic characteristics of the polymerization process. Propylene polymerization quality online measurement system with strong robustness, high confidence level, and strong reliability

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