Internal Thermally Coupled Distillation Column Control Device Based on Temperature Wave Characteristics

Abstract

The invention relates to an internal thermally coupled rectification tower control device based on temperature wave characteristics, including an internal thermally coupled rectification tower, an intelligent instrument, a control station, a data storage device and a host computer, an intelligent instrument and an internal thermally coupled rectification tower Connection, the control station is connected with the internal thermally coupled rectification tower, the data storage device is connected with the intelligent instrument and the control station, the host computer is connected with the data storage device and the control station, and the host computer includes a concentration gradient description module, a temperature gradient description module, a temperature wave Static description module, temperature fluctuation dynamic description module, set value conversion module and control parameter solving module. The nonlinear control scheme of the present invention is based on a high-precision nonlinear model, which can suppress the interference in time; handles the coupling problem well, and can quickly and accurately track the change of the set value; with high measurement accuracy and small measurement delay Temperature is the main control method, which greatly improves the control speed and control performance.

Description

technical field [0001] The invention belongs to the field of nonlinear control in rectification and energy-saving process, and in particular relates to an internal heat coupling rectification tower control device 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 ...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the above-mentioned deficiencies such as low online operation efficiency, poor interference suppression ability, poor control effect and low sensitivity to noise existing in the existing internal thermally coupled rectification control device, and provides an internal thermal control device based on temperature wave characteristics. Coupled with the control device of the rectification tower, the control device can realize accurate and rapid tracking of the set value, and has the advantages of fast online operation speed, strong anti-noise ability, and good control effect.

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