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Dynamic matrix control system and method for high-purity distillation

A dynamic matrix control and dynamic matrix technology, applied in the field of rectification, can solve the problems of enhancement and the difficulty of effective implementation of advanced control schemes.

Inactive Publication Date: 2007-05-16
ZHEJIANG UNIV
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  • Application Information

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Problems solved by technology

However, in view of the limitations of the instrument control system hardware, the nonlinearity of the high-purity distillation process is significantly enhanced with the increase of purity every 0.1% or even every 0.01% purity, and the unique complex dynamic characteristics such as strong coupling of the system, it is difficult for many advanced control schemes Effective implementation in the process of high-purity distillation has become a bottleneck in the high-purity control of products produced by distillation

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  • Dynamic matrix control system and method for high-purity distillation
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[0046] The present invention will be described in detail below in conjunction with FIG. 1 , FIG. 2 and FIG. 3 , and the purpose and effect of the present invention will be more obvious.

[0047] The control system includes: rectification tower (control object), intelligent detection instrument (sensing and transmission), DCS system, upper computer and field bus. The rectification tower, intelligent detection instrument, DCS system and host computer are connected in sequence through the field bus to realize the upload and download of information flow. The host computer includes an inference controller, a dynamic matrix controller and a man-machine interface.

[0048] The difference between the system connection method and the traditional industrial process is that the system makes full use of the development of DCS and computer technology, the detection instruments at the top and bottom of the tower are connected to the DCS system, and the detected signals are uploaded to the r...

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Abstract

The invention relates to a dynamic matrix control system of high-purity distillation, which comprises distillation tower, intelligent checker, DCS system, superior host, and on-site bus, while they are connected. The control system uses tower product group as the object variable, and the reflux ratio and reboil ratio as control variable; the superior receives history temperature and pressure data from the DCS real-time database, via the predict control and dynamic matrix controller, to obtain the output values of present controller as reflux ratio and reboil ratio, then feedback said two values to DCS system, to function the distillation object. The invention can confirm the high-purity stable operation, with better dynamical control.

Description

technical field [0001] The invention relates to the technical field of rectification, in particular to a dynamic matrix control system and method for high-purity rectification. Background technique [0002] The rectification process is one of the most important unit operations to achieve material separation and purification, and it is also one of the most widely used unit operations in industrial processes. With the rapid development of science and technology, people have put forward higher and higher requirements for the purity of chemical products, so high-purity distillation technology has attracted more and more attention, but this field in our country has just started, compared with the world's advanced level There is still a big gap, which restricts the development of my country's fine chemical technology to a certain extent. [0003] Statistics show that the total pesticide sales of domestic pesticide companies is only equivalent to the annual sales of a medium-sized ...

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Application Information

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IPC IPC(8): B01D3/42
Inventor 刘兴高王成裕
Owner ZHEJIANG UNIV