A real-time monitoring method of butane concentration in debutanizer bottom product based on SAE

Abstract

The invention discloses a SAE-based method for real-time monitoring of the butane concentration of the bottom product of the debutanizer, aiming at solving the problem of how to avoid information loss by using SAE to extract the nonlinear characteristics of the process measurement data of the butane tower layer by layer, and fully and effectively The on-line soft-sensing problem of the butane concentration in the bottom product of the tower is realized by using these nonlinear characteristics. First, when the method of the present invention is training the model, the input of each layer of autoencoder uses the original process data, so the problem of information loss of the input data is avoided in the process of feature extraction. Secondly, the method of the present invention uses the hidden layer output vectors of each layer of neural networks as the input of the single layer neural network, thereby making full use of the nonlinear features extracted by SAE. Compared with the traditional method, when the method of the present invention monitors the butane concentration of the bottom product of the debutanizer on-line, its real-time soft measurement accuracy can be guaranteed.

Description

technical field [0001] The invention relates to a soft measurement technology, in particular to an SAE-based real-time monitoring method for the concentration of butane in the bottom product of a debutanizer. Background technique [0002] Debutanizer is a very important equipment in the process of oil refining industry, and its role in the process of oil refining is to separate naphtha and desulfurize. The process flow of debutanizer generally includes 6 chemical equipment: tower top condenser, heat exchanger, tower top reflux pump, tower bottom reboiler, reflux liquid receiver, and feed pump. In the naphtha flow passage, it is necessary to remove propane and butane in the naphtha. Therefore, minimizing the butane content of the bottoms product is very important for butane column quality control requirements. In order to ensure the real-time performance of quality control, online real-time measurement of butane concentration is the most direct and effective technical means...

AI Technical Summary

Problems solved by technology

It is worth emphasizing that although SAE can extract the features in the input data layer by layer, the problem of information loss will occur in the process of extracting features layer by layer.

From this perspective, it is impossible to fully and effectively mine the features.

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