Design method of automatic control system for vapour-liquid consecutive reaction rectifying process

An automatic control system and serial reaction technology, applied in chemical/physics/physicochemical stationary reactors, fractionation, etc., can solve the difficulty of control system design and increase control accuracy requirements, and reduce the strong nonlinearity and coupling of closed-loop systems , less control degrees of freedom and other issues, to achieve the effect of ensuring long-term stable operation, increasing control accuracy and difficulty, and reducing control degrees of freedom

Inactive Publication Date: 2013-06-19
NANJING UNIV OF TECH
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Problems solved by technology

[0006] Since the reaction and separation processes occur in one device at the same time, not only the system exhibits strong nonlinearity, coupling and multi-stable characteristics, but also the control system design of the reactive distillation process is less complex than the traditional production process. The control degree of freedom and more complex dynamic characteristics make the design difficulty of the control system of the reactive distillation pro

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  • Design method of automatic control system for vapour-liquid consecutive reaction rectifying process
  • Design method of automatic control system for vapour-liquid consecutive reaction rectifying process
  • Design method of automatic control system for vapour-liquid consecutive reaction rectifying process

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Embodiment example

[0036] Implementation case: design case of automatic control system for benzene chlorination series reaction distillation process

[0037] Chlorinated benzene is often used in the manufacture of organic intermediates such as phenol, nitrochlorobenzene, aniline, and nitrophenol in the dye and pharmaceutical industries. The raw materials of the benzene chlorination reaction process are benzene and chlorine. The product is chlorinated benzene, and the by-product dichlorobenzene (mainly o-dichlorobenzene, p-dichlorobenzene) is obtained. The reaction formula is as follows:

[0038] The main reaction equation: (3)

[0039] Side reaction equation: (4)

[0040] Bourion has studied the kinetics of benzene chlorination by using ferric chloride as a catalyst, chlorine gas entering the liquid phase by bubbling, and obtained the kinetic equation of benzene chlorination as follows:

[0041] r 1 ...

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Abstract

The invention discloses a design method of an automatic control system for the vapour-liquid consecutive reaction rectifying process. The design method comprises the following steps of: (1) determining an optimal steady-state technological parameter of a vapour-liquid consecutive reaction rectifying tower; (2) determining a control target designed by the control system; (3) reasonably selecting a manipulated variable and an operating variable; (4), determining the position of the temperature of a sensitive plate; (5) designing a multi-loop automatic control system for the reaction rectifying process; and (6) adjusting and setting a controller structure parameter of the multi-loop automatic control system. The design method of the automatic control system for the vapour-liquid consecutive reaction rectifying process, provided by the invention, can effectively avoid the problems that the dynamic maladjustment of reaction and separating capacity in the tower can be easily caused by reaction mass properties and external disturbance, so that the product quality is reduced and the energy consumption is increased, and by using the method, a long-term stability operation of a closed-loop system of a vapour-liquid consecutive reaction rectification integration device is realized.

Description

technical field [0001] The invention relates to an interdisciplinary subject of chemical engineering and control engineering, belongs to the field of automatic control of production processes of chemical reactors and rectification towers, and relates to a design method of an automatic control system for a vapor-liquid series reaction rectification process. Background technique [0002] Reaction and distillation integration technology is an enhanced process that integrates chemical reaction and distillation separation process in the same equipment. Compared with the traditional production process, the reactive distillation integration technology effectively improves the conversion rate of raw materials or the selectivity of target products by removing the reaction products out of the tower in time, and has obvious advantages in the rational use of reaction heat, the improvement of equipment integration, and the saving of equipment investment. Advantage. In the industrial rea...

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Application Information

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IPC IPC(8): B01J19/24B01D3/14
Inventor 薄翠梅乔旭崔咪芬冯康康李芳芳张程浩
Owner NANJING UNIV OF TECH
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