Multivariable-based batch chemical production process dynamic on-line monitoring method and device

Abstract

The invention relates to a multivariable-based batch chemical production process dynamic on-line monitoring method and device. The method comprises the following steps: obtaining and storing data through a database; judging ending of batch production; determining batch production processes; obtaining historical data; carrying out data cleaning; carrying out multivariable-based principal component analysis; judging contribution rate of two principal components; determining first and second principal components; calculating scores of the first and second principal components; generating a normal operation mode; obtaining real-time data of the first principal component; obtaining real-time data of the second principal component; calculating real-time scores of the first and second principal components; judging the operation mode; and carrying out operation mode alarm. The method and device overcome the common problem that, in the chemical production process, each key variable is within the control range, but the product quality problem still appears, and the difficulty that root cause analysis cannot be carried out, thereby improving batch process optimization control precision and product one-time qualified rate.

Description

technical field [0001] The invention relates to the fields of chemical industry, metallurgy, manufacturing and the like, in particular to a multi-variable process dynamic on-line monitoring method and device suitable for intermittent chemical production enterprises. Background technique [0002] The batch production process is the process of batch production of products in sequential operation steps, such as the production process of fine chemicals, pharmaceuticals, biochemicals, polymers, etc. As an important production mode in industrial production, batch industrial process is closely related to the life of modern people. It is widely used in fine chemical industry, biopharmaceutical, food, polymer reaction, metal processing and other fields, and plays a pivotal role. In recent years, the ever-changing market in modern society has put forward more urgent demands for multi-variety, multi-standard and high-quality products, making the modern process industry more dependent o...

AI Technical Summary

Problems solved by technology

[0005] Based on the above-mentioned defects in the prior art, it is necessary to provide a dynamic online monitoring method and device for batch chemical production process based on multi-variables, which can solve the problem of using fixed upper and lower limits to control key controls in each process in the current batch chemical production process. Variables can be independently monitored online, and multi-dimensional and comprehensive monitoring cannot be realized. Through the analysis and application of "big data" in chemical production, the control accuracy of batch process optimization and the first pass rate of products are greatly improved.

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