Internal thermally coupled rectifying tower control device based on temperature wave characteristics

Abstract

The invention relates to an internal thermally coupled rectifying tower control device based on temperature wave characteristics. The device comprises an internal thermally coupled rectifying tower, an intelligent instrument, a control station, a data storage device and an upper computer, wherein the intelligent instrument is connected with the internal thermally coupled rectifying tower; the control station is connected with the internal thermally coupled rectifying tower; the data storage device is connected with the intelligent instrument and the control station; and the upper computer is connected with the data storage device and the control station and comprises a concentration gradient description module, a temperature gradient description module, a static temperature wave description module, a dynamic temperature wave description module, a set value conversion module and a control parameter solution module. According to the device disclosed by the invention, a nonlinear control scheme is established on the basis of a high-precision nonlinear model, and the interference effect can be timely inhibited; the coupling problem is well solved, and the set value change can be rapidly and accurately tracked; and moreover, the temperature with high measurement precision and small measurement time delay is taken as a main control means, and the control speed and control performance are greatly improved.

Description

Technical field [0001] The invention belongs to the field of nonlinear control in the energy-saving rectification process, and specifically relates to an internal thermally coupled 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, metallurgical, 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 distillation process is extremely low, only 5%-10%, which severely restricts economic development. [0003] The internal thermal coupling distillation technology makes full use of the heat exchange between the rectification section and the stripping section, which saves more than 30% energy than convention...

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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