bp Global Optimal Propylene Polymerization Production Process Optimal Soft Sensing Instrument and Method

An optimal soft-sensing, propylene polymerization technology, applied in the direction of comprehensive factory control, comprehensive factory control, electrical program control, etc., can solve the problems of low measurement accuracy and easy to be affected by human factors.

Inactive Publication Date: 2016-08-17
ZHEJIANG UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to overcome the shortcomings of the current existing propylene polymerization production process, such as low measurement accuracy and being easily affected by human factors, the purpose of the present invention is to provide an online measurement, online parameter optimization, fast soft measurement speed, automatic model update, anti- BP Global Optimal Melt Index Optimal Soft Measurement Instrument and Method in Propylene Polymerization Production Process with Strong Interference Capability and High Precision

Method used

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  • bp Global Optimal Propylene Polymerization Production Process Optimal Soft Sensing Instrument and Method
  • bp Global Optimal Propylene Polymerization Production Process Optimal Soft Sensing Instrument and Method
  • bp Global Optimal Propylene Polymerization Production Process Optimal Soft Sensing Instrument and Method

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Embodiment 1

[0082] 1. refer to figure 1 , figure 2 with image 3 , a BP globally optimal soft measuring instrument for propylene polymerization production process, including propylene polymerization production process 1, on-site intelligent instrument 2 for measuring easily measurable variables, control station 3 for measuring operating variables, and DCS for storing data Database 4, BP global optimal soft sensor 5 and melt index soft sensor value display 6, the on-site intelligent instrument 2, the control station 3 are connected to the propylene polymerization production process 1, the on-site intelligent instrument 2, the control station 3 and the The DCS database 4 is connected, and the DCS database 4 is connected with the input end of the BP global optimal soft sensor 5, and the output end of the BP global optimal soft sensor 5 is connected with the melting index soft sensor value display instrument 6, and the BP global optimal soft sensor includes:

[0083] (1) The data preproc...

Embodiment 2

[0155] 1. refer to figure 1 , figure 2 with image 3 , a BP global optimal propylene polymerization production process optimal soft-sensing method includes the following steps:

[0156] (1) For the propylene polymerization production process object, according to the process analysis and operation analysis, the operational variables and easily measurable variables are selected as the input of the model, and the operational variables and easily measurable variables are obtained from the DCS database;

[0157] (2) Preprocess the sample data, center the input variables, that is, subtract the average value of the variables; and then perform normalization processing, that is, divide by the change interval of the variable value;

[0158] (3) The PCA principal component analysis module is used to pre-whiten the input variables and de-correlate the variables. It is realized by applying a linear transformation to the input variables, that is, the principal components are obtained by...

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Abstract

The invention discloses an optimum soft measurement instrument in the BP global optimum propylene polymerization production process. According to the optimum soft measurement instrument, the propylene polymerization production process, an intelligent field instrument, a control station, a DCS database storing data, a BP global optimum soft measurement instrument and a fusion index soft measurement value display instrument are included. The intelligent field instrument and the control station are connected with the propylene polymerization production process and the DCS database. The optimum soft measurement instrument is connected with the DCS database and the soft measurement value display instrument. The BP global optimum soft measurement instrument comprises a model updating module, a data preprocessing module, a PCA module and an intelligent multi-mode BP neural network optimization module. The invention further provides a soft measurement method implemented through the soft measurement instrument. By means of the optimum soft measurement instrument and the soft measurement method, online measurement and online parameter optimization are realized, the soft measurement speed is high, a model is updated automatically, the anti-jamming capability is high, and accuracy is high.

Description

technical field [0001] The invention relates to an optimal soft measuring instrument and method, in particular to an optimal soft measuring instrument and method for BP global optimal propylene polymerization production process. 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, fibers, and non-woven fabrics with good balance of rigidity, toughness, and fluidity, and develop poly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/418G06N3/02
CPCY02P90/02
Inventor 刘兴高李九宝
Owner ZHEJIANG UNIV
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