Ultra-pure adaptive nonlinear control system and method for internal thermally coupled distillation column

An internal thermal coupling, nonlinear control technology, applied in the direction of comprehensive factory control, comprehensive factory control, electrical program control, etc., can solve problems such as poor control effect and poor interference suppression ability.

Inactive Publication Date: 2010-11-10
ZHEJIANG UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the shortcomings of poor interference suppression ability and poor control effect of the existing internal thermally coupled rectification tower control method, the present invention provides a high-purity automatic internal thermally coupled rectification tower with good interference suppression ability and good control effect. Adaptive nonlinear control system and method

Method used

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  • Ultra-pure adaptive nonlinear control system and method for internal thermally coupled distillation column
  • Ultra-pure adaptive nonlinear control system and method for internal thermally coupled distillation column
  • Ultra-pure adaptive nonlinear control system and method for internal thermally coupled distillation column

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Embodiment 1

[0064] refer to figure 1 , figure 2 , a high-purity self-adaptive nonlinear control system for an internal thermally coupled rectification tower, the control system includes field intelligent instruments 2 and a DCS system 13 directly connected to the internal thermally coupled rectification tower, and the DCS system 13 includes a storage device 4 , control station 5 and host computer 6, described field smart instrument 2 is connected with storage device 4, control station 5 and host computer 6 successively through field bus and data interface 3; Described smart instrument is used to realize the function of detection module 7 That is, the temperature and pressure data of the internal thermal coupling rectification tower are detected, and the data interface is used to realize the function of the I / O module 8, that is, the input and output of data. A high-purity adaptive nonlinear controller for the control variable value of the distillation column, the high-purity adaptive no...

Embodiment 2

[0090] refer to figure 1 and figure 2 , a high-purity self-adaptive nonlinear control method for an internal thermally coupled rectification tower, the control method comprising the following steps:

[0091] 1) Determine the sampling period t, and compare the value of t, the relative volatility α, the pressure of the stripping section P s , Antonie constants a, b, c are stored in the historical database;

[0092] 2) Set the control law parameter K 1 , K 2 , K 3 , K 4 and the set value Y of the product concentration at the top and bottom of the tower 1 * , X n * ;

[0093] 3) Obtain the pressure P of the rectification section at k sampling time from the smart instrument r Pressure in the stripping section P s , and each tray temperature T i , to calculate the concentration of light components in the liquid phase, and use formula (1) (2) to get:

[0094] X i ( k ) = ...

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Abstract

The invention discloses an ultra-pure adaptive nonlinear control system for an internal thermally coupled distillation column. The system comprises a filed intelligent instrument and a DCS system which are directly connected with the internal thermally coupled distillation column, wherein the DCS system comprises a storage device, a control station, and an upper computer; the filed intelligent instrument is connected with the storage device, the control station, and the upper computer; the upper computer comprises an ultra-pure adaptive nonlinear controller which is used for calculating and outputting the control variable value of the internal thermally coupled distillation column; and the ultra-pure adaptive nonlinear controller comprises a component deduction module, a model parameter adaptive correction module, and an adaptive ultra-pure control law solving module. The invention also provides an ultra-pure adaptive nonlinear control method for the internal thermally coupled distillation column. The control system and the control method can well process the strong nonlinear characteristics of the ultra-pure internal thermally coupled distillation column, and have efficient online operating rate and extremely good servo tracking control effect and interference suppression effect.

Description

technical field [0001] The invention relates to the design problem of a rectification energy-saving control system and method, and in particular proposes a high-purity self-adaptive nonlinear control system and method for an internal heat-coupled rectification tower. Background technique [0002] The rectification process is a core process in the chemical process, and the rectification column is one of the key units. For a long time, the rectification column has become the focus of research in the field of international distillation because of its high energy consumption and low energy efficiency. At present, there are two main solutions to the energy consumption problem in the rectification process: one is to design a new structure, which uses heat coupling to realize energy reuse to achieve energy saving purposes; the other is to design a high-efficiency distillation process control strategy to improve product quality and reduce waste So as to achieve the purpose of energ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/418
CPCY02P90/02
Inventor 刘兴高周叶翔
Owner ZHEJIANG UNIV
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