Chemical reactor temperature control method based on quantification single-parameter PID control

Abstract

The invention relates to a chemical reactor temperature control method based on quantification single-parameter PID control, and the chemical reactor temperature control method is used for controlling the temperature of a chemical polymerization reactor. The control method includes the steps that a temperature signal of an object to be controlled is firstly collected, a model of the object to be controlled is identified according to the temperature signal, meanwhile, a single-parameter PID control module based on a system performance degree is built, a control output signal of the single-parameter PID control module is then obtained according to the model of the object to be controlled and the set system performance degree, and finally the temperature of the object to be controlled is controlled by the control output signal and is kept with a set range. In comparison with the prior art, only the parameter lambda needs to be adjusted so that the system performance can be achieved, operation is easy, moreover, the chemical reactor temperature control method has good robustness for the model to be identified, and the control effect on great delay, great inertia and other characteristics in the temperature control process is rapid and smooth.

Description

technical field [0001] The invention relates to the technical field of industrial process control, in particular to a chemical reactor temperature control method based on quantitative single-parameter PID control, aimed at the temperature control of polymerization reactors used in large chemical plants, based on quantitative process control theory, It is easy to trade off between system performance and robustness, and it is very simple to use. Background technique [0002] The chemical industry has always been a key industry related to the lifeline of the national economy, and chemical process control is a very important part of the chemical industry, which directly affects the product quality, operating efficiency and economic benefits of the chemical industry. Therefore, the design of chemical process controllers It has important practical application value. At present, more than 95% of the controllers in the chemical process control are PID controllers. The reason why th...

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Problems solved by technology

[0010] Therefore, it can be known from the above that the instability of the open-loop response of the polymerization reactor, the difficulties in the actual process and design, and the reaction characteristics of the reactor make the traditional controller unable to meet the needs of actual temperature control.

Design controllers for specified performance and robustness because conventional methods cannot specify performance

In addition, the main problems of the state-space robust method for designing controllers are: the range of uncertainty needs to be known, it is difficult to design the controller according to specificity and robustness, and when the range of uncertainty changes, it needs to be redesigned The controller, the controller is more complex

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