Thermal coupling air separation unit energy-saving intelligent optimization system based on hybrid modeling

Abstract

The invention discloses a thermal coupling air separation unit energy-saving intelligent optimization system based on hybrid modeling. The system comprises a mechanism statistics hybrid modeling module, an energy consumption calculation module and an energy-saving intelligent optimization calculation module. The system is used for carrying out operation energy-saving intelligent optimization calculation on the thermal coupling air separation equipment and transmitting optimal operation parameters to a control station and a storage system through a field bus. The method aims to overcome the defects that an existing thermal coupling space division model is low in online operation efficiency and poor in model precision. Through combining with a high-expansibility mechanism model and a statistical model which can use a large amount of production historical data, an energy-saving mixing model with high precision and high efficiency of thermal coupling air separation equipment is established. On the basis, the thermal coupling air separation equipment energy-saving intelligent optimization system based on hybrid modeling is realized, the complex nonlinear physical property characteristics of the thermal coupling air separation process can be effectively reflected, the online operation efficiency is high, and the energy-saving optimization effect is better than that of a traditional optimization method based on a mechanism model or a statistical model.

Description

technical field [0001] The invention relates to the field of energy-saving intelligent optimization of air separation equipment, in particular to a thermally coupled air separation equipment energy-saving intelligent optimization system based on hybrid modeling. Background technique [0002] Air separation plant is a production device widely used in industrial production process. Air separation equipment separates air and obtains high-purity industrial gases such as oxygen, nitrogen, and argon, which are widely used in various industrial fields such as petroleum, chemical industry, energy, electronics, metallurgy, aerospace, medical care, food and beverage, etc. It has wide application and important significance in the national economy. Air separation equipment is one of the most energy-consuming equipment in the industrial production process, but it is a typical low-temperature distillation process, and its thermodynamic efficiency is not high. The theoretical thermodynami...

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Problems solved by technology

[0004] In order to overcome the deficiencies in the existing air separation equipment energy-saving optimization system, the modeling process of the air separation equipment cannot effectively reflect the complex nonlinear physical characteristics of the air separation process, the online operation efficiency is low, and the accuracy is low. The purpose of the present invention is to provide a The energy-saving intelligent optimization system of air separation equipment based on hybrid modeling can effectively reflect the complex nonlinear physical characteristics of the air separation process, with high online operation efficiency and better energy-saving optimization effect

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