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System and method for controlling air-separating tower dynamic matrix

A dynamic matrix control, dynamic matrix technology, applied in distillation regulation/control, refrigeration and liquefaction, liquefaction and other directions, can solve the problems of inability to adapt to the dynamic characteristics of air separation operation, strong, nonlinear and other issues

Inactive Publication Date: 2007-11-21
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the shortcomings of the existing air separation tower control schemes that cannot adapt to the dynamic characteristics of the air separation operation, strong nonlinearity, and coupling between loops, and cannot obtain good control effects, the present invention provides a control scheme that can adapt to air separation. The dynamic characteristics of the separation operation, the strong nonlinearity, and the coupling between the loops, the dynamic matrix control system and method for controlling the air separation tower with good comprehensive effects

Method used

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  • System and method for controlling air-separating tower dynamic matrix
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  • System and method for controlling air-separating tower dynamic matrix

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Embodiment 1

[0080] With reference to Fig. 1~Fig. 4, a kind of dynamic matrix control system of air separation tower, comprises the scene intelligent instrument 2 that is directly connected with air separation tower 1, is used to store the data storage device of historical data and host computer 6, intelligent instrument 2, The data storage device and the upper computer 6 are connected in turn, and the upper computer 6 is a dynamic matrix controller, and the dynamic matrix controller includes a composition inference control part and a dynamic matrix control part, and the composition inference control part includes : detection instrument module 7, including temperature detection element and pressure detection element, used to detect the temperature and pressure of the upper tower of the air separation tower; I / O element module 9, used for electrical signals, and data signals in the controller and control The transmission between the device and the DCS, the composition inference module 10 is ...

Embodiment 2

[0188] With reference to Fig. 1~Fig. 4, a kind of control method realized with the dynamic matrix control system of described air separation tower, described control method comprises the following steps:

[0189] (1) Determine the two-component set value Y of the air separation tower 1set 、X nset , and the sampling period T;

[0190] (2) At each sampling time KT, the composition is inferred based on the temperature and pressure data obtained from the detection, and the formulas are (1), (2):

[0191] Y 1 = α α - 1 - 10 ( a - b T 1 + c ) ...

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Abstract

A controlling system of the dynamic matrix for the air separation tower, it includes the local intelligent meter which connects to the tower, data storage device for the history of the data, and the position machine. The intellective meter, data storage device and position machine connect to each other in sequence. The talked position machine is the controlling machine for the dynamic matrix which consists of the controlling part of the ingredient judging and dynamic matrix. The ingredient judging part includes the module of the testing meter, I / O element module and ingredient judging module. The dynamic matrix includes I / O element module, forecasting model module, feedback revising module, rotating optimizing module and output controlling module. It also provides a controlling method for the realization of the dynamic matrix controlling for the tower. This invention can be suitable to the dynamic characteristic, strongly non linear and coupling of the circuit for the air separation, and the integrated controlling effectiveness is good.

Description

(1) Technical field [0001] The invention relates to the field of control system and method design of an air separation tower, in particular, to a dynamic matrix control system and method of an air separation tower. (2) Background technology [0002] The air separation plant is a device that separates the air and obtains high-purity industrial gases such as oxygen, nitrogen, and argon. It is a supporting unit operation of many industries related to the lifeline of the national economy, such as chemical industry, metallurgy, electronics, energy, aerospace, food and beverage, etc. An important indicator of the level of development. [0003] Air separation operation is a complex process involving low temperature, multi-equipment, long process, complex operation and high safety production requirements. In production, the purity of oxygen, nitrogen, and argon products is often required to be as high as 99%, which belongs to the problem of high-purity rectification control. Comp...

Claims

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Application Information

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IPC IPC(8): F25J3/04B01D3/42
Inventor 刘兴高
Owner ZHEJIANG UNIV
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