Design And Implement Of Self-Circulation Boiler Control

Boiler is a very important power unit in industrial production, suchas: chemical, oil-refining and electric power. It is Energy conversionequipment and can provide power for industrial production. With therapid development of modern industry, it is higher requirement forindustrial automation, while power saving and rational use of resources isan important indicator whether boiler has a good performance. I designcontrol plan and system for simulation object SMPT-1000Self-Circulation Boiler in this paper, it contain PID control, sequentialcontrol and expert PID control; The application of advanced controlstrategies have been obtained some results.There are many sections and equipments in running process ofself-circulation boiler, the overall process has not only the diversity andcomplexity, but also has characteristics of the nonlinear and the large timedelay. Therefore, it cannot obtain better result by using PID control. Thispaper identifies the order of model by using determinant ratio, and thenuses recursive least squares method to identify model, finally buildsadvanced controller by using expert PID control algorithms so that thecontrolled object is achieved to control. Experiments showed that theexpert PID control algorithm has good control effect.The controlled object is selected multiple functional process system—SMPT-1000Self-Circulation Boiler, the control system has beendesigned based Siemens PCS7BOX. This paper introduces PCS7controlplatform, it contain two sections: hardware structure and softwarestructure. It needs to use CFC,SFC,SCL language to finish PIDcontrol,sequential control and expert PID control for accomplishing todesign control system; Finish designing human interface by using WinCC;It contains Operator screen configuration, alarm system and archivingsystem designing, finish monitoring and managing to Self-CirculationBoiler.The result of system experiment shows that control plan isreasonably designed. Control system is running security and stability andmeets process requirement, the result of control is good.