Method for adjusting process parameters in polyester fiber polymerization process

Abstract

The invention relates to a method for adjusting process parameters in a polyester fiber polymerization process, which comprises the following steps of: acquiring a predicted value of a polyester fiberperformance index, comparing the predicted value with a set value, and adjusting the process parameters in the polyester fiber polymerization process according to a comparison result; the collectionprocess of the predicted value comprises the following steps: firstly, collecting m parts of characteristic data from all characteristic data acquired by a sensor; performing feature correlation sorting on the m parts of feature data based on an extreme gradient boosting tree algorithm of grid search; selecting the first n parts of feature data with relatively high feature correlation from the m parts of sorted feature data; normalization processing is carried out on all samples of the n parts of feature data; and finally, processing the n normalized characteristic data by using a weighted double-flow bidirectional long-short-term memory attention network, and respectively outputting predicted values of the four polyester fiber performance indexes. According to the method, the predicted value of the polyester fiber performance index can be obtained with high precision, so that industrial production can be better guided.

Description

technical field [0001] The invention belongs to the technical field of chemical fiber production technology, and relates to a method for adjusting process parameters in the polyester fiber polymerization process. Background technique [0002] The polymerization process is the primary link in the research of the whole process of polyester fiber production. The process includes three stages of esterification, precondensation and final polycondensation. The polymerization process mainly includes four performance indicators, which are the average molecular weight M n , degree of polymerization P n , intrinsic viscosity MIV and esterification rate E s . For example, the average molecular weight of the polymer M n It determines the strength and impact resistance of the product. However, there are three performance indicators in actual industrial production that cannot be measured by sensors in real time, so the production process of polyester fibers cannot be directly contro...

AI Technical Summary

Problems solved by technology

This cannot accurately adjust the process parameters that need to be adjusted, thereby improving the quality of polyester fiber products

[0005] Therefore, there are problems such as inaccuracy and untimeliness in the adjustment method of the process parameters in the polyester fiber polymerization process in the prior art, which need to be solved urgently.

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