Internal thermally coupled distillation online observer based on temperature wave characteristics

Abstract

The invention relates to an internal thermally coupled distillation online observer based on temperature wave characteristics. The internal thermally coupled distillation online observer comprises an internal thermally coupled distillation column, an intelligent instrument, a control station, a data storage device, an upper computer observer and a PC display interface, wherein the intelligent instrument is connected to the internal thermally coupled distillation column; the control station is connected to the internal thermally coupled distillation column; the data storage device is connected with the intelligent instrument and the control station; the upper computer observer is connected with the data storage device; the upper computer display interface is connected with the upper computer observer; the upper computer observer comprises a concentration gradient description module, a temperature gradient description module, a temperature wave static description module, a temperature wave dynamic description module, an error calculation module and a future time state prediction module. The internal thermally coupled distillation online observer based on temperature wave characteristics utilizes a nonlinear prediction model based on the temperature wave characteristics of internal thermally coupled distillation process, can track the complex dynamic characteristics of internal thermal coupling in high efficiency and high precision, has high online operation efficiency and strong anti-interference ability, and achieves efficient and accurate dynamic observation effects.

Description

technical field [0001] The invention belongs to the field of dynamic modeling in rectification energy-saving process, and in particular relates to an internal heat-coupled rectification online observer based on temperature wave characteristics. Background technique [0002] The energy consumption of the distillation process accounts for 20% of the total energy consumption of the national economy and 67% of the petrochemical industry. It is a unit operation widely used in petroleum, chemical, metallurgy, coal chemical and other industries, and is closely related to many pillar industries of my country's national economy. However, the energy utilization rate of the rectification process is extremely low, only 5%-10%, which seriously restricts the economic development. [0003] The internal thermal coupling rectification technology makes full use of the heat exchange between the rectification section and the stripping section, saving energy by more than 30% compared with conven...

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Problems solved by technology

[0004] The present invention aims at the above-mentioned deficiencies such as low measurement accuracy, low online operation efficiency, and high sensitivity to noise existing in existing internal thermally coupled rectification observers, and provides an internal thermally coupled rectification online observer based on temperature wave characteristics , the observer can realize on-line measurement and real-time error correction, and has the advantages of high observation accuracy, fast operation speed, and strong anti-noise ability

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