Precision control system of chemical reactor of continuous operation

Operation of the precision automatic control system for a continuous chemical reactor of the synthesis of the vitamin B6 is considered. Flows of concentrated nitric acid and a suspension of pyridone with acetic anhydride enter the reactor. The reaction of pyridone with acid is exothermic, therefore, the reactor is provided with a jacket for cooling the mixture. From the point of view of modeling the chemical reactor for the synthesis of vitamin B6 is a reactor of ideal mixing. The reactor model takes into account the mutual influence of parameters, heat transfer and the kinetics of a chemical reaction. The model of automation equipment takes into account its basic properties. The dynamics of actuators, running-down of the shaft speed are considered, which enables the realization of more accurate control. Considering peculiarities of measuring devices of the control system modeling increases the reliability of transient processes and assessment of the system quality. The kernel of the system is the optimal nonlinear multidimensional controller. The control system enables providing high-precision maintenance of the temperature of the exothermic reaction by taking into account the properties of the equipment. In addition, a higher quality compensation of disturbances is achieved by means of the use of the control approach with separation of entering flows in comparison with a typical control system. The developed system has the property of robustness when changing the load of the installation, providing high quality and safety of the synthesis process of the obtained vitamin. Strict maintenance of the technological mode prevents the occurrence of undesirable reactions resulting in admixtures and violation of the homologous formula of vitamin B6. The considered algorithm can serve as the basis for the development of precision automated process control systems of chemical technological type. © 2019 by Begell House Inc.